1a2443fd1SAndrew Lunn // SPDX-License-Identifier: GPL-2.0 27ce236faSRuslan Babayev #include <linux/acpi.h> 31323061aSAndrew Lunn #include <linux/ctype.h> 473970055SRussell King #include <linux/delay.h> 554a2fc62SFlorian Fainelli #include <linux/gpio/consumer.h> 61323061aSAndrew Lunn #include <linux/hwmon.h> 773970055SRussell King #include <linux/i2c.h> 873970055SRussell King #include <linux/interrupt.h> 973970055SRussell King #include <linux/jiffies.h> 1073970055SRussell King #include <linux/module.h> 1173970055SRussell King #include <linux/mutex.h> 1273970055SRussell King #include <linux/of.h> 1373970055SRussell King #include <linux/phy.h> 1473970055SRussell King #include <linux/platform_device.h> 1573970055SRussell King #include <linux/rtnetlink.h> 1673970055SRussell King #include <linux/slab.h> 1773970055SRussell King #include <linux/workqueue.h> 1873970055SRussell King 1973970055SRussell King #include "mdio-i2c.h" 2073970055SRussell King #include "sfp.h" 2173970055SRussell King #include "swphy.h" 2273970055SRussell King 2373970055SRussell King enum { 2473970055SRussell King GPIO_MODDEF0, 2573970055SRussell King GPIO_LOS, 2673970055SRussell King GPIO_TX_FAULT, 2773970055SRussell King GPIO_TX_DISABLE, 2873970055SRussell King GPIO_RATE_SELECT, 2973970055SRussell King GPIO_MAX, 3073970055SRussell King 3173970055SRussell King SFP_F_PRESENT = BIT(GPIO_MODDEF0), 3273970055SRussell King SFP_F_LOS = BIT(GPIO_LOS), 3373970055SRussell King SFP_F_TX_FAULT = BIT(GPIO_TX_FAULT), 3473970055SRussell King SFP_F_TX_DISABLE = BIT(GPIO_TX_DISABLE), 3573970055SRussell King SFP_F_RATE_SELECT = BIT(GPIO_RATE_SELECT), 3673970055SRussell King 3773970055SRussell King SFP_E_INSERT = 0, 3873970055SRussell King SFP_E_REMOVE, 396b0da5c9SRussell King SFP_E_DEV_ATTACH, 406b0da5c9SRussell King SFP_E_DEV_DETACH, 4173970055SRussell King SFP_E_DEV_DOWN, 4273970055SRussell King SFP_E_DEV_UP, 4373970055SRussell King SFP_E_TX_FAULT, 4473970055SRussell King SFP_E_TX_CLEAR, 4573970055SRussell King SFP_E_LOS_HIGH, 4673970055SRussell King SFP_E_LOS_LOW, 4773970055SRussell King SFP_E_TIMEOUT, 4873970055SRussell King 4973970055SRussell King SFP_MOD_EMPTY = 0, 5073f5e847SRussell King SFP_MOD_ERROR, 5173970055SRussell King SFP_MOD_PROBE, 5273f5e847SRussell King SFP_MOD_WAITDEV, 533bb35261SJon Nettleton SFP_MOD_HPOWER, 54b036a554SRussell King SFP_MOD_WAITPWR, 5573970055SRussell King SFP_MOD_PRESENT, 5673970055SRussell King 576b0da5c9SRussell King SFP_DEV_DETACHED = 0, 586b0da5c9SRussell King SFP_DEV_DOWN, 5973970055SRussell King SFP_DEV_UP, 6073970055SRussell King 6173970055SRussell King SFP_S_DOWN = 0, 6274c551caSRussell King SFP_S_FAIL, 63eefa6f1fSRussell King SFP_S_WAIT, 6473970055SRussell King SFP_S_INIT, 65d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6673970055SRussell King SFP_S_WAIT_LOS, 6773970055SRussell King SFP_S_LINK_UP, 6873970055SRussell King SFP_S_TX_FAULT, 6973970055SRussell King SFP_S_REINIT, 7073970055SRussell King SFP_S_TX_DISABLE, 7173970055SRussell King }; 7273970055SRussell King 734005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 744005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7573f5e847SRussell King [SFP_MOD_ERROR] = "error", 764005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7773f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 784005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 79b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 804005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 814005a7cbSAndrew Lunn }; 824005a7cbSAndrew Lunn 834005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 844005a7cbSAndrew Lunn { 854005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 864005a7cbSAndrew Lunn return "Unknown module state"; 874005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 884005a7cbSAndrew Lunn } 894005a7cbSAndrew Lunn 904005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 916b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 924005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 934005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 944005a7cbSAndrew Lunn }; 954005a7cbSAndrew Lunn 964005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 974005a7cbSAndrew Lunn { 984005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 994005a7cbSAndrew Lunn return "Unknown device state"; 1004005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1014005a7cbSAndrew Lunn } 1024005a7cbSAndrew Lunn 1034005a7cbSAndrew Lunn static const char * const event_strings[] = { 1044005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1054005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1066b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1076b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1084005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1094005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1104005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1114005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1124005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1134005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1144005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1154005a7cbSAndrew Lunn }; 1164005a7cbSAndrew Lunn 1174005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1184005a7cbSAndrew Lunn { 1194005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1204005a7cbSAndrew Lunn return "Unknown event"; 1214005a7cbSAndrew Lunn return event_strings[event]; 1224005a7cbSAndrew Lunn } 1234005a7cbSAndrew Lunn 1244005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1254005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 12674c551caSRussell King [SFP_S_FAIL] = "fail", 127eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1284005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 129d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1304005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1314005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1324005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1334005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1344005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1354005a7cbSAndrew Lunn }; 1364005a7cbSAndrew Lunn 1374005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1384005a7cbSAndrew Lunn { 1394005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1404005a7cbSAndrew Lunn return "Unknown state"; 1414005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1424005a7cbSAndrew Lunn } 1434005a7cbSAndrew Lunn 14473970055SRussell King static const char *gpio_of_names[] = { 14525ee0793SBaruch Siach "mod-def0", 14673970055SRussell King "los", 14773970055SRussell King "tx-fault", 14873970055SRussell King "tx-disable", 14925ee0793SBaruch Siach "rate-select0", 15073970055SRussell King }; 15173970055SRussell King 15273970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15373970055SRussell King GPIOD_IN, 15473970055SRussell King GPIOD_IN, 15573970055SRussell King GPIOD_IN, 15673970055SRussell King GPIOD_ASIS, 15773970055SRussell King GPIOD_ASIS, 15873970055SRussell King }; 15973970055SRussell King 16026c97a2dSRussell King /* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a 16126c97a2dSRussell King * non-cooled module to initialise its laser safety circuitry. We wait 16226c97a2dSRussell King * an initial T_WAIT period before we check the tx fault to give any PHY 16326c97a2dSRussell King * on board (for a copper SFP) time to initialise. 16426c97a2dSRussell King */ 165eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 16626c97a2dSRussell King #define T_START_UP msecs_to_jiffies(300) 16726c97a2dSRussell King #define T_START_UP_BAD_GPON msecs_to_jiffies(60000) 16826c97a2dSRussell King 16926c97a2dSRussell King /* t_reset is the time required to assert the TX_DISABLE signal to reset 17026c97a2dSRussell King * an indicated TX_FAULT. 17126c97a2dSRussell King */ 17273970055SRussell King #define T_RESET_US 10 17373970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 17473970055SRussell King 17573970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 17673970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 17773970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 17873970055SRussell King * 179d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 180d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 18173970055SRussell King */ 182d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1833bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 184e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 185e117be74SRussell King #define R_PROBE_RETRY_INIT 10 186e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 187e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 18873970055SRussell King 189516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 19073970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 19173970055SRussell King */ 19273970055SRussell King #define SFP_PHY_ADDR 22 19373970055SRussell King 194259c8618SRussell King struct sff_data { 195259c8618SRussell King unsigned int gpios; 196259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 197259c8618SRussell King }; 198259c8618SRussell King 19973970055SRussell King struct sfp { 20073970055SRussell King struct device *dev; 20173970055SRussell King struct i2c_adapter *i2c; 20273970055SRussell King struct mii_bus *i2c_mii; 20373970055SRussell King struct sfp_bus *sfp_bus; 20473970055SRussell King struct phy_device *mod_phy; 205259c8618SRussell King const struct sff_data *type; 2063bb35261SJon Nettleton u32 max_power_mW; 20773970055SRussell King 20873970055SRussell King unsigned int (*get_state)(struct sfp *); 20973970055SRussell King void (*set_state)(struct sfp *, unsigned int); 21073970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2113bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 21273970055SRussell King 21373970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 214257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 21573970055SRussell King 216f3c9a666SRussell King bool need_poll; 217f3c9a666SRussell King 2182158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 219f3c9a666SRussell King unsigned int state_soft_mask; 22073970055SRussell King unsigned int state; 22173970055SRussell King struct delayed_work poll; 22273970055SRussell King struct delayed_work timeout; 2232158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 22473970055SRussell King unsigned char sm_mod_state; 225e117be74SRussell King unsigned char sm_mod_tries_init; 226e117be74SRussell King unsigned char sm_mod_tries; 22773970055SRussell King unsigned char sm_dev_state; 22873970055SRussell King unsigned short sm_state; 22973970055SRussell King unsigned int sm_retries; 23073970055SRussell King 23173970055SRussell King struct sfp_eeprom_id id; 232ed32abb1SRussell King unsigned int module_power_mW; 23326c97a2dSRussell King unsigned int module_t_start_up; 234ed32abb1SRussell King 2351323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2361323061aSAndrew Lunn struct sfp_diag diag; 237139d3a21SRussell King struct delayed_work hwmon_probe; 238139d3a21SRussell King unsigned int hwmon_tries; 2391323061aSAndrew Lunn struct device *hwmon_dev; 2401323061aSAndrew Lunn char *hwmon_name; 2411323061aSAndrew Lunn #endif 2421323061aSAndrew Lunn 24373970055SRussell King }; 24473970055SRussell King 245259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 246259c8618SRussell King { 2470fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 248259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 249259c8618SRussell King } 250259c8618SRussell King 251259c8618SRussell King static const struct sff_data sff_data = { 252259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 253259c8618SRussell King .module_supported = sff_module_supported, 254259c8618SRussell King }; 255259c8618SRussell King 256259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 257259c8618SRussell King { 2580fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFP && 259259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 260259c8618SRussell King } 261259c8618SRussell King 262259c8618SRussell King static const struct sff_data sfp_data = { 263259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 264259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 265259c8618SRussell King .module_supported = sfp_module_supported, 266259c8618SRussell King }; 267259c8618SRussell King 268259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 269259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 270259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 271259c8618SRussell King { }, 272259c8618SRussell King }; 273259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 274259c8618SRussell King 27573970055SRussell King static unsigned long poll_jiffies; 27673970055SRussell King 27773970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 27873970055SRussell King { 27973970055SRussell King unsigned int i, state, v; 28073970055SRussell King 28173970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 28273970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 28373970055SRussell King continue; 28473970055SRussell King 28573970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 28673970055SRussell King if (v) 28773970055SRussell King state |= BIT(i); 28873970055SRussell King } 28973970055SRussell King 29073970055SRussell King return state; 29173970055SRussell King } 29273970055SRussell King 293259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 294259c8618SRussell King { 295259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 296259c8618SRussell King } 297259c8618SRussell King 29873970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 29973970055SRussell King { 30073970055SRussell King if (state & SFP_F_PRESENT) { 30173970055SRussell King /* If the module is present, drive the signals */ 30273970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 30373970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 30473970055SRussell King state & SFP_F_TX_DISABLE); 30573970055SRussell King if (state & SFP_F_RATE_SELECT) 30673970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 30773970055SRussell King state & SFP_F_RATE_SELECT); 30873970055SRussell King } else { 30973970055SRussell King /* Otherwise, let them float to the pull-ups */ 31073970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 31173970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 31273970055SRussell King if (state & SFP_F_RATE_SELECT) 31373970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 31473970055SRussell King } 31573970055SRussell King } 31673970055SRussell King 3173bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3183bb35261SJon Nettleton size_t len) 31973970055SRussell King { 32073970055SRussell King struct i2c_msg msgs[2]; 3213bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 32228e74a7cSRussell King size_t this_len; 32373970055SRussell King int ret; 32473970055SRussell King 32573970055SRussell King msgs[0].addr = bus_addr; 32673970055SRussell King msgs[0].flags = 0; 32773970055SRussell King msgs[0].len = 1; 32873970055SRussell King msgs[0].buf = &dev_addr; 32973970055SRussell King msgs[1].addr = bus_addr; 33073970055SRussell King msgs[1].flags = I2C_M_RD; 33173970055SRussell King msgs[1].len = len; 33273970055SRussell King msgs[1].buf = buf; 33373970055SRussell King 33428e74a7cSRussell King while (len) { 33528e74a7cSRussell King this_len = len; 33628e74a7cSRussell King if (this_len > 16) 33728e74a7cSRussell King this_len = 16; 33828e74a7cSRussell King 33928e74a7cSRussell King msgs[1].len = this_len; 34028e74a7cSRussell King 3413bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 34273970055SRussell King if (ret < 0) 34373970055SRussell King return ret; 34473970055SRussell King 34528e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 34628e74a7cSRussell King break; 34728e74a7cSRussell King 34828e74a7cSRussell King msgs[1].buf += this_len; 34928e74a7cSRussell King dev_addr += this_len; 35028e74a7cSRussell King len -= this_len; 35128e74a7cSRussell King } 35228e74a7cSRussell King 35328e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 35473970055SRussell King } 35573970055SRussell King 3563bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 35773970055SRussell King size_t len) 35873970055SRussell King { 3593bb35261SJon Nettleton struct i2c_msg msgs[1]; 3603bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3613bb35261SJon Nettleton int ret; 3623bb35261SJon Nettleton 3633bb35261SJon Nettleton msgs[0].addr = bus_addr; 3643bb35261SJon Nettleton msgs[0].flags = 0; 3653bb35261SJon Nettleton msgs[0].len = 1 + len; 3663bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3673bb35261SJon Nettleton if (!msgs[0].buf) 3683bb35261SJon Nettleton return -ENOMEM; 3693bb35261SJon Nettleton 3703bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3713bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3723bb35261SJon Nettleton 3733bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3743bb35261SJon Nettleton 3753bb35261SJon Nettleton kfree(msgs[0].buf); 3763bb35261SJon Nettleton 3773bb35261SJon Nettleton if (ret < 0) 3783bb35261SJon Nettleton return ret; 3793bb35261SJon Nettleton 3803bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 38173970055SRussell King } 38273970055SRussell King 38373970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 38473970055SRussell King { 38573970055SRussell King struct mii_bus *i2c_mii; 38673970055SRussell King int ret; 38773970055SRussell King 38873970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 38973970055SRussell King return -EINVAL; 39073970055SRussell King 39173970055SRussell King sfp->i2c = i2c; 39273970055SRussell King sfp->read = sfp_i2c_read; 3933bb35261SJon Nettleton sfp->write = sfp_i2c_write; 39473970055SRussell King 39573970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 39673970055SRussell King if (IS_ERR(i2c_mii)) 39773970055SRussell King return PTR_ERR(i2c_mii); 39873970055SRussell King 39973970055SRussell King i2c_mii->name = "SFP I2C Bus"; 40073970055SRussell King i2c_mii->phy_mask = ~0; 40173970055SRussell King 40273970055SRussell King ret = mdiobus_register(i2c_mii); 40373970055SRussell King if (ret < 0) { 40473970055SRussell King mdiobus_free(i2c_mii); 40573970055SRussell King return ret; 40673970055SRussell King } 40773970055SRussell King 40873970055SRussell King sfp->i2c_mii = i2c_mii; 40973970055SRussell King 41073970055SRussell King return 0; 41173970055SRussell King } 41273970055SRussell King 41373970055SRussell King /* Interface */ 41473970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 41573970055SRussell King { 41673970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 41773970055SRussell King } 41873970055SRussell King 4193bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4203bb35261SJon Nettleton { 4213bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4223bb35261SJon Nettleton } 4233bb35261SJon Nettleton 424f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 425f3c9a666SRussell King { 426f3c9a666SRussell King unsigned int state = 0; 427f3c9a666SRussell King u8 status; 428f3c9a666SRussell King 429f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 430f3c9a666SRussell King sizeof(status)) { 431f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 432f3c9a666SRussell King state |= SFP_F_LOS; 433f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 434f3c9a666SRussell King state |= SFP_F_TX_FAULT; 435f3c9a666SRussell King } 436f3c9a666SRussell King 437f3c9a666SRussell King return state & sfp->state_soft_mask; 438f3c9a666SRussell King } 439f3c9a666SRussell King 440f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 441f3c9a666SRussell King { 442f3c9a666SRussell King u8 status; 443f3c9a666SRussell King 444f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 445f3c9a666SRussell King sizeof(status)) { 446f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 447f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 448f3c9a666SRussell King else 449f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 450f3c9a666SRussell King 451f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 452f3c9a666SRussell King } 453f3c9a666SRussell King } 454f3c9a666SRussell King 455f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 456f3c9a666SRussell King { 457f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 458f3c9a666SRussell King 459f3c9a666SRussell King sfp->state_soft_mask = 0; 460f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 461f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 462f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 463f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 464f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 465f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 466f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 467f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 468f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 469f3c9a666SRussell King 470f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 471f3c9a666SRussell King !sfp->need_poll) 472f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 473f3c9a666SRussell King } 474f3c9a666SRussell King 475f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 476f3c9a666SRussell King { 477f3c9a666SRussell King sfp->state_soft_mask = 0; 478f3c9a666SRussell King } 479f3c9a666SRussell King 480f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 481f3c9a666SRussell King { 482f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 483f3c9a666SRussell King 484f3c9a666SRussell King if (state & SFP_F_PRESENT && 485f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 486f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 487f3c9a666SRussell King 488f3c9a666SRussell King return state; 489f3c9a666SRussell King } 490f3c9a666SRussell King 491f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 492f3c9a666SRussell King { 493f3c9a666SRussell King sfp->set_state(sfp, state); 494f3c9a666SRussell King 495f3c9a666SRussell King if (state & SFP_F_PRESENT && 496f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 497f3c9a666SRussell King sfp_soft_set_state(sfp, state); 498f3c9a666SRussell King } 499f3c9a666SRussell King 50073970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 50173970055SRussell King { 50273970055SRussell King u8 *p, check; 50373970055SRussell King 50473970055SRussell King for (p = buf, check = 0; len; p++, len--) 50573970055SRussell King check += *p; 50673970055SRussell King 50773970055SRussell King return check; 50873970055SRussell King } 50973970055SRussell King 5101323061aSAndrew Lunn /* hwmon */ 5111323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5121323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5131323061aSAndrew Lunn enum hwmon_sensor_types type, 5141323061aSAndrew Lunn u32 attr, int channel) 5151323061aSAndrew Lunn { 5161323061aSAndrew Lunn const struct sfp *sfp = data; 5171323061aSAndrew Lunn 5181323061aSAndrew Lunn switch (type) { 5191323061aSAndrew Lunn case hwmon_temp: 5201323061aSAndrew Lunn switch (attr) { 5211323061aSAndrew Lunn case hwmon_temp_min_alarm: 5221323061aSAndrew Lunn case hwmon_temp_max_alarm: 5231323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5241323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5251323061aSAndrew Lunn case hwmon_temp_min: 5261323061aSAndrew Lunn case hwmon_temp_max: 5271323061aSAndrew Lunn case hwmon_temp_lcrit: 5281323061aSAndrew Lunn case hwmon_temp_crit: 529a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 530a33710bdSAndrew Lunn return 0; 531a33710bdSAndrew Lunn /* fall through */ 532a33710bdSAndrew Lunn case hwmon_temp_input: 533c1236979SAndrew Lunn case hwmon_temp_label: 5341323061aSAndrew Lunn return 0444; 5351323061aSAndrew Lunn default: 5361323061aSAndrew Lunn return 0; 5371323061aSAndrew Lunn } 5381323061aSAndrew Lunn case hwmon_in: 5391323061aSAndrew Lunn switch (attr) { 5401323061aSAndrew Lunn case hwmon_in_min_alarm: 5411323061aSAndrew Lunn case hwmon_in_max_alarm: 5421323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5431323061aSAndrew Lunn case hwmon_in_crit_alarm: 5441323061aSAndrew Lunn case hwmon_in_min: 5451323061aSAndrew Lunn case hwmon_in_max: 5461323061aSAndrew Lunn case hwmon_in_lcrit: 5471323061aSAndrew Lunn case hwmon_in_crit: 548a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 549a33710bdSAndrew Lunn return 0; 550a33710bdSAndrew Lunn /* fall through */ 551a33710bdSAndrew Lunn case hwmon_in_input: 552c1236979SAndrew Lunn case hwmon_in_label: 5531323061aSAndrew Lunn return 0444; 5541323061aSAndrew Lunn default: 5551323061aSAndrew Lunn return 0; 5561323061aSAndrew Lunn } 5571323061aSAndrew Lunn case hwmon_curr: 5581323061aSAndrew Lunn switch (attr) { 5591323061aSAndrew Lunn case hwmon_curr_min_alarm: 5601323061aSAndrew Lunn case hwmon_curr_max_alarm: 5611323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5621323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5631323061aSAndrew Lunn case hwmon_curr_min: 5641323061aSAndrew Lunn case hwmon_curr_max: 5651323061aSAndrew Lunn case hwmon_curr_lcrit: 5661323061aSAndrew Lunn case hwmon_curr_crit: 567a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 568a33710bdSAndrew Lunn return 0; 569a33710bdSAndrew Lunn /* fall through */ 570a33710bdSAndrew Lunn case hwmon_curr_input: 571c1236979SAndrew Lunn case hwmon_curr_label: 5721323061aSAndrew Lunn return 0444; 5731323061aSAndrew Lunn default: 5741323061aSAndrew Lunn return 0; 5751323061aSAndrew Lunn } 5761323061aSAndrew Lunn case hwmon_power: 5771323061aSAndrew Lunn /* External calibration of receive power requires 5781323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 5791323061aSAndrew Lunn * is not easy, so just skip it. If the module does 5801323061aSAndrew Lunn * not require external calibration, we can however 5811323061aSAndrew Lunn * show receiver power, since FP is then not needed. 5821323061aSAndrew Lunn */ 5831323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 5841323061aSAndrew Lunn channel == 1) 5851323061aSAndrew Lunn return 0; 5861323061aSAndrew Lunn switch (attr) { 5871323061aSAndrew Lunn case hwmon_power_min_alarm: 5881323061aSAndrew Lunn case hwmon_power_max_alarm: 5891323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 5901323061aSAndrew Lunn case hwmon_power_crit_alarm: 5911323061aSAndrew Lunn case hwmon_power_min: 5921323061aSAndrew Lunn case hwmon_power_max: 5931323061aSAndrew Lunn case hwmon_power_lcrit: 5941323061aSAndrew Lunn case hwmon_power_crit: 595a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 596a33710bdSAndrew Lunn return 0; 597a33710bdSAndrew Lunn /* fall through */ 598a33710bdSAndrew Lunn case hwmon_power_input: 599c1236979SAndrew Lunn case hwmon_power_label: 6001323061aSAndrew Lunn return 0444; 6011323061aSAndrew Lunn default: 6021323061aSAndrew Lunn return 0; 6031323061aSAndrew Lunn } 6041323061aSAndrew Lunn default: 6051323061aSAndrew Lunn return 0; 6061323061aSAndrew Lunn } 6071323061aSAndrew Lunn } 6081323061aSAndrew Lunn 6091323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6101323061aSAndrew Lunn { 6111323061aSAndrew Lunn __be16 val; 6121323061aSAndrew Lunn int err; 6131323061aSAndrew Lunn 6141323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6151323061aSAndrew Lunn if (err < 0) 6161323061aSAndrew Lunn return err; 6171323061aSAndrew Lunn 6181323061aSAndrew Lunn *value = be16_to_cpu(val); 6191323061aSAndrew Lunn 6201323061aSAndrew Lunn return 0; 6211323061aSAndrew Lunn } 6221323061aSAndrew Lunn 6231323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6241323061aSAndrew Lunn { 6250cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6261323061aSAndrew Lunn } 6271323061aSAndrew Lunn 6281323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6291323061aSAndrew Lunn long *value) 6301323061aSAndrew Lunn { 6311323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6321323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6331323061aSAndrew Lunn } 6341323061aSAndrew Lunn 6351323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6361323061aSAndrew Lunn { 6371323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6381323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6391323061aSAndrew Lunn 6401323061aSAndrew Lunn if (*value >= 0x8000) 6411323061aSAndrew Lunn *value -= 0x10000; 6421323061aSAndrew Lunn 6431323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6441323061aSAndrew Lunn } 6451323061aSAndrew Lunn 6461323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6471323061aSAndrew Lunn { 6481323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6491323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6501323061aSAndrew Lunn 6511323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6521323061aSAndrew Lunn } 6531323061aSAndrew Lunn 6541323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6551323061aSAndrew Lunn { 6561323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6571323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6581323061aSAndrew Lunn 6591323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6601323061aSAndrew Lunn } 6611323061aSAndrew Lunn 6621323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6631323061aSAndrew Lunn { 6641323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6651323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6681323061aSAndrew Lunn } 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 6711323061aSAndrew Lunn { 6721323061aSAndrew Lunn int err; 6731323061aSAndrew Lunn 6741323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6751323061aSAndrew Lunn if (err < 0) 6761323061aSAndrew Lunn return err; 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6791323061aSAndrew Lunn 6801323061aSAndrew Lunn return 0; 6811323061aSAndrew Lunn } 6821323061aSAndrew Lunn 6831323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 6841323061aSAndrew Lunn { 6851323061aSAndrew Lunn int err; 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6881323061aSAndrew Lunn if (err < 0) 6891323061aSAndrew Lunn return err; 6901323061aSAndrew Lunn 6911323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 6921323061aSAndrew Lunn 6931323061aSAndrew Lunn return 0; 6941323061aSAndrew Lunn } 6951323061aSAndrew Lunn 6961323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 6971323061aSAndrew Lunn { 6981323061aSAndrew Lunn int err; 6991323061aSAndrew Lunn 7001323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7011323061aSAndrew Lunn if (err < 0) 7021323061aSAndrew Lunn return err; 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7051323061aSAndrew Lunn 7061323061aSAndrew Lunn return 0; 7071323061aSAndrew Lunn } 7081323061aSAndrew Lunn 7091323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7101323061aSAndrew Lunn { 7111323061aSAndrew Lunn int err; 7121323061aSAndrew Lunn 7131323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7141323061aSAndrew Lunn if (err < 0) 7151323061aSAndrew Lunn return err; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7181323061aSAndrew Lunn 7191323061aSAndrew Lunn return 0; 7201323061aSAndrew Lunn } 7211323061aSAndrew Lunn 7221323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7231323061aSAndrew Lunn { 7241323061aSAndrew Lunn int err; 7251323061aSAndrew Lunn 7261323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7271323061aSAndrew Lunn if (err < 0) 7281323061aSAndrew Lunn return err; 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7311323061aSAndrew Lunn 7321323061aSAndrew Lunn return 0; 7331323061aSAndrew Lunn } 7341323061aSAndrew Lunn 7351323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7361323061aSAndrew Lunn { 7371323061aSAndrew Lunn u8 status; 7381323061aSAndrew Lunn int err; 7391323061aSAndrew Lunn 7401323061aSAndrew Lunn switch (attr) { 7411323061aSAndrew Lunn case hwmon_temp_input: 7421323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7431323061aSAndrew Lunn 7441323061aSAndrew Lunn case hwmon_temp_lcrit: 7451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7461323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7471323061aSAndrew Lunn return 0; 7481323061aSAndrew Lunn 7491323061aSAndrew Lunn case hwmon_temp_min: 7501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7511323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7521323061aSAndrew Lunn return 0; 7531323061aSAndrew Lunn case hwmon_temp_max: 7541323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7551323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7561323061aSAndrew Lunn return 0; 7571323061aSAndrew Lunn 7581323061aSAndrew Lunn case hwmon_temp_crit: 7591323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7601323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7611323061aSAndrew Lunn return 0; 7621323061aSAndrew Lunn 7631323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7651323061aSAndrew Lunn if (err < 0) 7661323061aSAndrew Lunn return err; 7671323061aSAndrew Lunn 7681323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7691323061aSAndrew Lunn return 0; 7701323061aSAndrew Lunn 7711323061aSAndrew Lunn case hwmon_temp_min_alarm: 7721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7731323061aSAndrew Lunn if (err < 0) 7741323061aSAndrew Lunn return err; 7751323061aSAndrew Lunn 7761323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 7771323061aSAndrew Lunn return 0; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn case hwmon_temp_max_alarm: 7801323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7811323061aSAndrew Lunn if (err < 0) 7821323061aSAndrew Lunn return err; 7831323061aSAndrew Lunn 7841323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 7851323061aSAndrew Lunn return 0; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7881323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7891323061aSAndrew Lunn if (err < 0) 7901323061aSAndrew Lunn return err; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 7931323061aSAndrew Lunn return 0; 7941323061aSAndrew Lunn default: 7951323061aSAndrew Lunn return -EOPNOTSUPP; 7961323061aSAndrew Lunn } 7971323061aSAndrew Lunn 7981323061aSAndrew Lunn return -EOPNOTSUPP; 7991323061aSAndrew Lunn } 8001323061aSAndrew Lunn 8011323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8021323061aSAndrew Lunn { 8031323061aSAndrew Lunn u8 status; 8041323061aSAndrew Lunn int err; 8051323061aSAndrew Lunn 8061323061aSAndrew Lunn switch (attr) { 8071323061aSAndrew Lunn case hwmon_in_input: 8081323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn case hwmon_in_lcrit: 8111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8121323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8131323061aSAndrew Lunn return 0; 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn case hwmon_in_min: 8161323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8171323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8181323061aSAndrew Lunn return 0; 8191323061aSAndrew Lunn 8201323061aSAndrew Lunn case hwmon_in_max: 8211323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8221323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8231323061aSAndrew Lunn return 0; 8241323061aSAndrew Lunn 8251323061aSAndrew Lunn case hwmon_in_crit: 8261323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8271323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8281323061aSAndrew Lunn return 0; 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8311323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8321323061aSAndrew Lunn if (err < 0) 8331323061aSAndrew Lunn return err; 8341323061aSAndrew Lunn 8351323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8361323061aSAndrew Lunn return 0; 8371323061aSAndrew Lunn 8381323061aSAndrew Lunn case hwmon_in_min_alarm: 8391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8401323061aSAndrew Lunn if (err < 0) 8411323061aSAndrew Lunn return err; 8421323061aSAndrew Lunn 8431323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8441323061aSAndrew Lunn return 0; 8451323061aSAndrew Lunn 8461323061aSAndrew Lunn case hwmon_in_max_alarm: 8471323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8481323061aSAndrew Lunn if (err < 0) 8491323061aSAndrew Lunn return err; 8501323061aSAndrew Lunn 8511323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8521323061aSAndrew Lunn return 0; 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_in_crit_alarm: 8551323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8561323061aSAndrew Lunn if (err < 0) 8571323061aSAndrew Lunn return err; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8601323061aSAndrew Lunn return 0; 8611323061aSAndrew Lunn default: 8621323061aSAndrew Lunn return -EOPNOTSUPP; 8631323061aSAndrew Lunn } 8641323061aSAndrew Lunn 8651323061aSAndrew Lunn return -EOPNOTSUPP; 8661323061aSAndrew Lunn } 8671323061aSAndrew Lunn 8681323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8691323061aSAndrew Lunn { 8701323061aSAndrew Lunn u8 status; 8711323061aSAndrew Lunn int err; 8721323061aSAndrew Lunn 8731323061aSAndrew Lunn switch (attr) { 8741323061aSAndrew Lunn case hwmon_curr_input: 8751323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn case hwmon_curr_lcrit: 8781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 8791323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8801323061aSAndrew Lunn return 0; 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn case hwmon_curr_min: 8831323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 8841323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8851323061aSAndrew Lunn return 0; 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn case hwmon_curr_max: 8881323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 8891323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8901323061aSAndrew Lunn return 0; 8911323061aSAndrew Lunn 8921323061aSAndrew Lunn case hwmon_curr_crit: 8931323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 8941323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8951323061aSAndrew Lunn return 0; 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8991323061aSAndrew Lunn if (err < 0) 9001323061aSAndrew Lunn return err; 9011323061aSAndrew Lunn 9021323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9031323061aSAndrew Lunn return 0; 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn case hwmon_curr_min_alarm: 9061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9071323061aSAndrew Lunn if (err < 0) 9081323061aSAndrew Lunn return err; 9091323061aSAndrew Lunn 9101323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 9111323061aSAndrew Lunn return 0; 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn case hwmon_curr_max_alarm: 9141323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9151323061aSAndrew Lunn if (err < 0) 9161323061aSAndrew Lunn return err; 9171323061aSAndrew Lunn 9181323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9191323061aSAndrew Lunn return 0; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9221323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9231323061aSAndrew Lunn if (err < 0) 9241323061aSAndrew Lunn return err; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9271323061aSAndrew Lunn return 0; 9281323061aSAndrew Lunn default: 9291323061aSAndrew Lunn return -EOPNOTSUPP; 9301323061aSAndrew Lunn } 9311323061aSAndrew Lunn 9321323061aSAndrew Lunn return -EOPNOTSUPP; 9331323061aSAndrew Lunn } 9341323061aSAndrew Lunn 9351323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9361323061aSAndrew Lunn { 9371323061aSAndrew Lunn u8 status; 9381323061aSAndrew Lunn int err; 9391323061aSAndrew Lunn 9401323061aSAndrew Lunn switch (attr) { 9411323061aSAndrew Lunn case hwmon_power_input: 9421323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn case hwmon_power_lcrit: 9451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9461323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9471323061aSAndrew Lunn return 0; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn case hwmon_power_min: 9501323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9511323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9521323061aSAndrew Lunn return 0; 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn case hwmon_power_max: 9551323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9561323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9571323061aSAndrew Lunn return 0; 9581323061aSAndrew Lunn 9591323061aSAndrew Lunn case hwmon_power_crit: 9601323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9611323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9621323061aSAndrew Lunn return 0; 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9661323061aSAndrew Lunn if (err < 0) 9671323061aSAndrew Lunn return err; 9681323061aSAndrew Lunn 9691323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 9701323061aSAndrew Lunn return 0; 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn case hwmon_power_min_alarm: 9731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9741323061aSAndrew Lunn if (err < 0) 9751323061aSAndrew Lunn return err; 9761323061aSAndrew Lunn 9771323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 9781323061aSAndrew Lunn return 0; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn case hwmon_power_max_alarm: 9811323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9821323061aSAndrew Lunn if (err < 0) 9831323061aSAndrew Lunn return err; 9841323061aSAndrew Lunn 9851323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 9861323061aSAndrew Lunn return 0; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_power_crit_alarm: 9891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9901323061aSAndrew Lunn if (err < 0) 9911323061aSAndrew Lunn return err; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn default: 9961323061aSAndrew Lunn return -EOPNOTSUPP; 9971323061aSAndrew Lunn } 9981323061aSAndrew Lunn 9991323061aSAndrew Lunn return -EOPNOTSUPP; 10001323061aSAndrew Lunn } 10011323061aSAndrew Lunn 10021323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10031323061aSAndrew Lunn { 10041323061aSAndrew Lunn u8 status; 10051323061aSAndrew Lunn int err; 10061323061aSAndrew Lunn 10071323061aSAndrew Lunn switch (attr) { 10081323061aSAndrew Lunn case hwmon_power_input: 10091323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10101323061aSAndrew Lunn 10111323061aSAndrew Lunn case hwmon_power_lcrit: 10121323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10131323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10141323061aSAndrew Lunn return 0; 10151323061aSAndrew Lunn 10161323061aSAndrew Lunn case hwmon_power_min: 10171323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10181323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10191323061aSAndrew Lunn return 0; 10201323061aSAndrew Lunn 10211323061aSAndrew Lunn case hwmon_power_max: 10221323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10231323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10241323061aSAndrew Lunn return 0; 10251323061aSAndrew Lunn 10261323061aSAndrew Lunn case hwmon_power_crit: 10271323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10281323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10291323061aSAndrew Lunn return 0; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10331323061aSAndrew Lunn if (err < 0) 10341323061aSAndrew Lunn return err; 10351323061aSAndrew Lunn 10361323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10371323061aSAndrew Lunn return 0; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn case hwmon_power_min_alarm: 10401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10411323061aSAndrew Lunn if (err < 0) 10421323061aSAndrew Lunn return err; 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10451323061aSAndrew Lunn return 0; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn case hwmon_power_max_alarm: 10481323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10491323061aSAndrew Lunn if (err < 0) 10501323061aSAndrew Lunn return err; 10511323061aSAndrew Lunn 10521323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10531323061aSAndrew Lunn return 0; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_power_crit_alarm: 10561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10571323061aSAndrew Lunn if (err < 0) 10581323061aSAndrew Lunn return err; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn default: 10631323061aSAndrew Lunn return -EOPNOTSUPP; 10641323061aSAndrew Lunn } 10651323061aSAndrew Lunn 10661323061aSAndrew Lunn return -EOPNOTSUPP; 10671323061aSAndrew Lunn } 10681323061aSAndrew Lunn 10691323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 10701323061aSAndrew Lunn u32 attr, int channel, long *value) 10711323061aSAndrew Lunn { 10721323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn switch (type) { 10751323061aSAndrew Lunn case hwmon_temp: 10761323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 10771323061aSAndrew Lunn case hwmon_in: 10781323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 10791323061aSAndrew Lunn case hwmon_curr: 10801323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 10811323061aSAndrew Lunn case hwmon_power: 10821323061aSAndrew Lunn switch (channel) { 10831323061aSAndrew Lunn case 0: 10841323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 10851323061aSAndrew Lunn case 1: 10861323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 10871323061aSAndrew Lunn default: 10881323061aSAndrew Lunn return -EOPNOTSUPP; 10891323061aSAndrew Lunn } 10901323061aSAndrew Lunn default: 10911323061aSAndrew Lunn return -EOPNOTSUPP; 10921323061aSAndrew Lunn } 10931323061aSAndrew Lunn } 10941323061aSAndrew Lunn 1095c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1096c1236979SAndrew Lunn "TX_power", 1097c1236979SAndrew Lunn "RX_power", 1098c1236979SAndrew Lunn }; 1099c1236979SAndrew Lunn 1100c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1101c1236979SAndrew Lunn enum hwmon_sensor_types type, 1102c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1103c1236979SAndrew Lunn { 1104c1236979SAndrew Lunn switch (type) { 1105c1236979SAndrew Lunn case hwmon_curr: 1106c1236979SAndrew Lunn switch (attr) { 1107c1236979SAndrew Lunn case hwmon_curr_label: 1108c1236979SAndrew Lunn *str = "bias"; 1109c1236979SAndrew Lunn return 0; 1110c1236979SAndrew Lunn default: 1111c1236979SAndrew Lunn return -EOPNOTSUPP; 1112c1236979SAndrew Lunn } 1113c1236979SAndrew Lunn break; 1114c1236979SAndrew Lunn case hwmon_temp: 1115c1236979SAndrew Lunn switch (attr) { 1116c1236979SAndrew Lunn case hwmon_temp_label: 1117c1236979SAndrew Lunn *str = "temperature"; 1118c1236979SAndrew Lunn return 0; 1119c1236979SAndrew Lunn default: 1120c1236979SAndrew Lunn return -EOPNOTSUPP; 1121c1236979SAndrew Lunn } 1122c1236979SAndrew Lunn break; 1123c1236979SAndrew Lunn case hwmon_in: 1124c1236979SAndrew Lunn switch (attr) { 1125c1236979SAndrew Lunn case hwmon_in_label: 1126c1236979SAndrew Lunn *str = "VCC"; 1127c1236979SAndrew Lunn return 0; 1128c1236979SAndrew Lunn default: 1129c1236979SAndrew Lunn return -EOPNOTSUPP; 1130c1236979SAndrew Lunn } 1131c1236979SAndrew Lunn break; 1132c1236979SAndrew Lunn case hwmon_power: 1133c1236979SAndrew Lunn switch (attr) { 1134c1236979SAndrew Lunn case hwmon_power_label: 1135c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1136c1236979SAndrew Lunn return 0; 1137c1236979SAndrew Lunn default: 1138c1236979SAndrew Lunn return -EOPNOTSUPP; 1139c1236979SAndrew Lunn } 1140c1236979SAndrew Lunn break; 1141c1236979SAndrew Lunn default: 1142c1236979SAndrew Lunn return -EOPNOTSUPP; 1143c1236979SAndrew Lunn } 1144c1236979SAndrew Lunn 1145c1236979SAndrew Lunn return -EOPNOTSUPP; 1146c1236979SAndrew Lunn } 1147c1236979SAndrew Lunn 11481323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11491323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11501323061aSAndrew Lunn .read = sfp_hwmon_read, 1151c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11521323061aSAndrew Lunn }; 11531323061aSAndrew Lunn 11541323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11551323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11561323061aSAndrew Lunn 0, 11571323061aSAndrew Lunn }; 11581323061aSAndrew Lunn 11591323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11601323061aSAndrew Lunn .type = hwmon_chip, 11611323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11621323061aSAndrew Lunn }; 11631323061aSAndrew Lunn 11641323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11651323061aSAndrew Lunn HWMON_T_INPUT | 11661323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11671323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11681323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1169c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1170c1236979SAndrew Lunn HWMON_T_LABEL, 11711323061aSAndrew Lunn 0, 11721323061aSAndrew Lunn }; 11731323061aSAndrew Lunn 11741323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 11751323061aSAndrew Lunn .type = hwmon_temp, 11761323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 11771323061aSAndrew Lunn }; 11781323061aSAndrew Lunn 11791323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 11801323061aSAndrew Lunn HWMON_I_INPUT | 11811323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 11821323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 11831323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1184c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1185c1236979SAndrew Lunn HWMON_I_LABEL, 11861323061aSAndrew Lunn 0, 11871323061aSAndrew Lunn }; 11881323061aSAndrew Lunn 11891323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 11901323061aSAndrew Lunn .type = hwmon_in, 11911323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 11921323061aSAndrew Lunn }; 11931323061aSAndrew Lunn 11941323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 11951323061aSAndrew Lunn HWMON_C_INPUT | 11961323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 11971323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 11981323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1199c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1200c1236979SAndrew Lunn HWMON_C_LABEL, 12011323061aSAndrew Lunn 0, 12021323061aSAndrew Lunn }; 12031323061aSAndrew Lunn 12041323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12051323061aSAndrew Lunn .type = hwmon_curr, 12061323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12071323061aSAndrew Lunn }; 12081323061aSAndrew Lunn 12091323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12101323061aSAndrew Lunn /* Transmit power */ 12111323061aSAndrew Lunn HWMON_P_INPUT | 12121323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12131323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12141323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1215c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1216c1236979SAndrew Lunn HWMON_P_LABEL, 12171323061aSAndrew Lunn /* Receive power */ 12181323061aSAndrew Lunn HWMON_P_INPUT | 12191323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12201323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12211323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1222c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1223c1236979SAndrew Lunn HWMON_P_LABEL, 12241323061aSAndrew Lunn 0, 12251323061aSAndrew Lunn }; 12261323061aSAndrew Lunn 12271323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12281323061aSAndrew Lunn .type = hwmon_power, 12291323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12301323061aSAndrew Lunn }; 12311323061aSAndrew Lunn 12321323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12331323061aSAndrew Lunn &sfp_hwmon_chip, 12341323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12351323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12361323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12371323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12381323061aSAndrew Lunn NULL, 12391323061aSAndrew Lunn }; 12401323061aSAndrew Lunn 12411323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12421323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12431323061aSAndrew Lunn .info = sfp_hwmon_info, 12441323061aSAndrew Lunn }; 12451323061aSAndrew Lunn 1246139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12471323061aSAndrew Lunn { 1248139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12491323061aSAndrew Lunn int err, i; 12501323061aSAndrew Lunn 1251139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1252139d3a21SRussell King if (err < 0) { 1253139d3a21SRussell King if (sfp->hwmon_tries--) { 1254139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1255139d3a21SRussell King T_PROBE_RETRY_SLOW); 1256139d3a21SRussell King } else { 1257139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1258139d3a21SRussell King } 1259139d3a21SRussell King return; 1260139d3a21SRussell King } 1261139d3a21SRussell King 1262139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1263139d3a21SRussell King if (!sfp->hwmon_name) { 1264139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1265139d3a21SRussell King return; 1266139d3a21SRussell King } 1267139d3a21SRussell King 1268139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1269139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1270139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1271139d3a21SRussell King 1272139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1273139d3a21SRussell King sfp->hwmon_name, sfp, 1274139d3a21SRussell King &sfp_hwmon_chip_info, 1275139d3a21SRussell King NULL); 1276139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1277139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1278139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1279139d3a21SRussell King } 1280139d3a21SRussell King 1281139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1282139d3a21SRussell King { 12831323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 12841323061aSAndrew Lunn return 0; 12851323061aSAndrew Lunn 12861323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 12871323061aSAndrew Lunn return 0; 12881323061aSAndrew Lunn 12891323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 12901323061aSAndrew Lunn /* This driver in general does not support address 12911323061aSAndrew Lunn * change. 12921323061aSAndrew Lunn */ 12931323061aSAndrew Lunn return 0; 12941323061aSAndrew Lunn 1295139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1296139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 12971323061aSAndrew Lunn 1298139d3a21SRussell King return 0; 12991323061aSAndrew Lunn } 13001323061aSAndrew Lunn 13011323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13021323061aSAndrew Lunn { 1303139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13043e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13051323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13063e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13071323061aSAndrew Lunn kfree(sfp->hwmon_name); 13081323061aSAndrew Lunn } 13093e322474SAndrew Lunn } 1310139d3a21SRussell King 1311139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1312139d3a21SRussell King { 1313139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1314139d3a21SRussell King 1315139d3a21SRussell King return 0; 1316139d3a21SRussell King } 1317139d3a21SRussell King 1318139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1319139d3a21SRussell King { 1320139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1321139d3a21SRussell King } 13221323061aSAndrew Lunn #else 13231323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13241323061aSAndrew Lunn { 13251323061aSAndrew Lunn return 0; 13261323061aSAndrew Lunn } 13271323061aSAndrew Lunn 13281323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13291323061aSAndrew Lunn { 13301323061aSAndrew Lunn } 1331139d3a21SRussell King 1332139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1333139d3a21SRussell King { 1334139d3a21SRussell King return 0; 1335139d3a21SRussell King } 1336139d3a21SRussell King 1337139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1338139d3a21SRussell King { 1339139d3a21SRussell King } 13401323061aSAndrew Lunn #endif 13411323061aSAndrew Lunn 134273970055SRussell King /* Helpers */ 134373970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 134473970055SRussell King { 134573970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 134673970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 134773970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 134873970055SRussell King sfp_set_state(sfp, sfp->state); 134973970055SRussell King } 135073970055SRussell King 135173970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 135273970055SRussell King { 135373970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 135473970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 135573970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 135673970055SRussell King sfp_set_state(sfp, sfp->state); 135773970055SRussell King } 135873970055SRussell King 135973970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 136073970055SRussell King { 136173970055SRussell King unsigned int state = sfp->state; 136273970055SRussell King 136373970055SRussell King if (state & SFP_F_TX_DISABLE) 136473970055SRussell King return; 136573970055SRussell King 136673970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 136773970055SRussell King 136873970055SRussell King udelay(T_RESET_US); 136973970055SRussell King 137073970055SRussell King sfp_set_state(sfp, state); 137173970055SRussell King } 137273970055SRussell King 137373970055SRussell King /* SFP state machine */ 137473970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 137573970055SRussell King { 137673970055SRussell King if (timeout) 137773970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 137873970055SRussell King timeout); 137973970055SRussell King else 138073970055SRussell King cancel_delayed_work(&sfp->timeout); 138173970055SRussell King } 138273970055SRussell King 138373970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 138473970055SRussell King unsigned int timeout) 138573970055SRussell King { 138673970055SRussell King sfp->sm_state = state; 138773970055SRussell King sfp_sm_set_timer(sfp, timeout); 138873970055SRussell King } 138973970055SRussell King 13900936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1391516b29edSFlorian Fainelli unsigned int timeout) 139273970055SRussell King { 139373970055SRussell King sfp->sm_mod_state = state; 139473970055SRussell King sfp_sm_set_timer(sfp, timeout); 139573970055SRussell King } 139673970055SRussell King 139773970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 139873970055SRussell King { 139973970055SRussell King phy_stop(sfp->mod_phy); 140073970055SRussell King sfp_remove_phy(sfp->sfp_bus); 140173970055SRussell King phy_device_remove(sfp->mod_phy); 140273970055SRussell King phy_device_free(sfp->mod_phy); 140373970055SRussell King sfp->mod_phy = NULL; 140473970055SRussell King } 140573970055SRussell King 140673970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 140773970055SRussell King { 140873970055SRussell King struct phy_device *phy; 140973970055SRussell King int err; 141073970055SRussell King 141173970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 141220b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 141320b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 141473970055SRussell King return; 141573970055SRussell King } 141620b56ed9SRussell King if (IS_ERR(phy)) { 141720b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 141873970055SRussell King return; 141973970055SRussell King } 142073970055SRussell King 142173970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 142273970055SRussell King if (err) { 142373970055SRussell King phy_device_remove(phy); 142473970055SRussell King phy_device_free(phy); 142573970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 142673970055SRussell King return; 142773970055SRussell King } 142873970055SRussell King 142973970055SRussell King sfp->mod_phy = phy; 143073970055SRussell King phy_start(phy); 143173970055SRussell King } 143273970055SRussell King 143373970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 143473970055SRussell King { 143573970055SRussell King sfp_link_up(sfp->sfp_bus); 143673970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 143773970055SRussell King } 143873970055SRussell King 143973970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 144073970055SRussell King { 144173970055SRussell King sfp_link_down(sfp->sfp_bus); 144273970055SRussell King } 144373970055SRussell King 144473970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 144573970055SRussell King { 144673970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 144773970055SRussell King 1448710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1449710dfbb0SRussell King * are set, we assume that no LOS signal is available. 145073970055SRussell King */ 1451acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 145273970055SRussell King los ^= SFP_F_LOS; 1453710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1454710dfbb0SRussell King los = 0; 145573970055SRussell King 145673970055SRussell King if (los) 145773970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 145873970055SRussell King else 145973970055SRussell King sfp_sm_link_up(sfp); 146073970055SRussell King } 146173970055SRussell King 1462710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1463710dfbb0SRussell King { 1464710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1465710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1466710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1467710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1468710dfbb0SRussell King } 1469710dfbb0SRussell King 1470710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1471710dfbb0SRussell King { 1472710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1473710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1474710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1475710dfbb0SRussell King event == SFP_E_LOS_LOW); 1476710dfbb0SRussell King } 1477710dfbb0SRussell King 147863ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 147973970055SRussell King { 148073970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1481516b29edSFlorian Fainelli dev_err(sfp->dev, 1482516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 148373970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 148473970055SRussell King } else { 148573970055SRussell King if (warn) 148673970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 148773970055SRussell King 148863ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 148973970055SRussell King } 149073970055SRussell King } 149173970055SRussell King 1492181f29daSRussell King static void sfp_sm_probe_for_phy(struct sfp *sfp) 1493181f29daSRussell King { 1494fa2de660SRussell King if (sfp->id.base.e1000_base_t) 149573970055SRussell King sfp_sm_probe_phy(sfp); 149673970055SRussell King } 149773970055SRussell King 1498ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 14993bb35261SJon Nettleton { 1500ed32abb1SRussell King u32 power_mW = 1000; 15013bb35261SJon Nettleton 15023bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1503ed32abb1SRussell King power_mW = 1500; 15043bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1505ed32abb1SRussell King power_mW = 2000; 15063bb35261SJon Nettleton 1507ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 15087cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 15097cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 15107cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 15117cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 15127cfa9c92SRussell King /* The module appears not to implement bus address 15137cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 15147cfa9c92SRussell King * indicated mode. 15157cfa9c92SRussell King */ 15163bb35261SJon Nettleton dev_err(sfp->dev, 15173bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1518ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15193bb35261SJon Nettleton return -EINVAL; 15207cfa9c92SRussell King } else { 15213bb35261SJon Nettleton dev_warn(sfp->dev, 15223bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1523ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15243bb35261SJon Nettleton return 0; 15253bb35261SJon Nettleton } 15267cfa9c92SRussell King } 15277cfa9c92SRussell King 15287cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 15297cfa9c92SRussell King * an address change sequence, warn the user that the module may 15307cfa9c92SRussell King * not be functional. 15317cfa9c92SRussell King */ 15327cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 15337cfa9c92SRussell King dev_warn(sfp->dev, 153407f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 15357cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 15367cfa9c92SRussell King return 0; 15377cfa9c92SRussell King } 15383bb35261SJon Nettleton 1539ed32abb1SRussell King sfp->module_power_mW = power_mW; 1540ed32abb1SRussell King 1541ed32abb1SRussell King return 0; 1542ed32abb1SRussell King } 1543ed32abb1SRussell King 1544b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1545ed32abb1SRussell King { 1546ed32abb1SRussell King u8 val; 1547ed32abb1SRussell King int err; 1548ed32abb1SRussell King 15493bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15503bb35261SJon Nettleton if (err != sizeof(val)) { 15513bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1552b036a554SRussell King return -EAGAIN; 15533bb35261SJon Nettleton } 15543bb35261SJon Nettleton 1555b036a554SRussell King if (enable) 15563bb35261SJon Nettleton val |= BIT(0); 1557b036a554SRussell King else 1558b036a554SRussell King val &= ~BIT(0); 15593bb35261SJon Nettleton 15603bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15613bb35261SJon Nettleton if (err != sizeof(val)) { 15623bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1563b036a554SRussell King return -EAGAIN; 15643bb35261SJon Nettleton } 15653bb35261SJon Nettleton 1566b036a554SRussell King if (enable) 15673bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1568ed32abb1SRussell King sfp->module_power_mW / 1000, 1569ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 15703bb35261SJon Nettleton 1571b036a554SRussell King return 0; 15723bb35261SJon Nettleton } 15733bb35261SJon Nettleton 1574e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 157573970055SRussell King { 157673970055SRussell King /* SFP module inserted - read I2C data */ 157773970055SRussell King struct sfp_eeprom_id id; 1578981f1f80SRussell King bool cotsworks; 157973970055SRussell King u8 check; 15803bb35261SJon Nettleton int ret; 158173970055SRussell King 15823bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 15833bb35261SJon Nettleton if (ret < 0) { 1584e117be74SRussell King if (report) 15853bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 158673970055SRussell King return -EAGAIN; 158773970055SRussell King } 158873970055SRussell King 15893bb35261SJon Nettleton if (ret != sizeof(id)) { 15903bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 159173970055SRussell King return -EAGAIN; 159273970055SRussell King } 159373970055SRussell King 1594981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1595981f1f80SRussell King * do the final programming with the final module part number, 1596981f1f80SRussell King * serial number and date code. 1597981f1f80SRussell King */ 1598981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1599981f1f80SRussell King 160073970055SRussell King /* Validate the checksum over the base structure */ 160173970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 160273970055SRussell King if (check != id.base.cc_base) { 1603981f1f80SRussell King if (cotsworks) { 1604981f1f80SRussell King dev_warn(sfp->dev, 1605981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1606981f1f80SRussell King check, id.base.cc_base); 1607981f1f80SRussell King } else { 160873970055SRussell King dev_err(sfp->dev, 1609981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1610981f1f80SRussell King check, id.base.cc_base); 161173970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1612981f1f80SRussell King 16, 1, &id, sizeof(id), true); 161373970055SRussell King return -EINVAL; 161473970055SRussell King } 1615981f1f80SRussell King } 161673970055SRussell King 161773970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 161873970055SRussell King if (check != id.ext.cc_ext) { 1619981f1f80SRussell King if (cotsworks) { 1620981f1f80SRussell King dev_warn(sfp->dev, 1621981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1622981f1f80SRussell King check, id.ext.cc_ext); 1623981f1f80SRussell King } else { 162473970055SRussell King dev_err(sfp->dev, 1625981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1626981f1f80SRussell King check, id.ext.cc_ext); 1627981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1628981f1f80SRussell King 16, 1, &id, sizeof(id), true); 162973970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 163073970055SRussell King } 1631981f1f80SRussell King } 163273970055SRussell King 163373970055SRussell King sfp->id = id; 163473970055SRussell King 1635a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1636a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1637a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1638a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1639a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1640a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 164173970055SRussell King 1642259c8618SRussell King /* Check whether we support this module */ 1643f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1644259c8618SRussell King dev_err(sfp->dev, 1645259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 164673970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 164773970055SRussell King return -EINVAL; 164873970055SRussell King } 164973970055SRussell King 1650ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1651ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1652ec7681bdSRussell King dev_warn(sfp->dev, 1653ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1654ec7681bdSRussell King 1655ed32abb1SRussell King /* Parse the module power requirement */ 1656ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1657ed32abb1SRussell King if (ret < 0) 1658ed32abb1SRussell King return ret; 1659ed32abb1SRussell King 166026c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 166126c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 166226c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 166326c97a2dSRussell King else 166426c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 166526c97a2dSRussell King 1666b036a554SRussell King return 0; 166773970055SRussell King } 166873970055SRussell King 166973970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 167073970055SRussell King { 167173f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 167273970055SRussell King sfp_module_remove(sfp->sfp_bus); 167373970055SRussell King 16741323061aSAndrew Lunn sfp_hwmon_remove(sfp); 16751323061aSAndrew Lunn 167673970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1677ed32abb1SRussell King sfp->module_power_mW = 0; 167873970055SRussell King 167973970055SRussell King dev_info(sfp->dev, "module removed\n"); 168073970055SRussell King } 168173970055SRussell King 16826b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1683e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 168473970055SRussell King { 1685e85d81a1SRussell King switch (sfp->sm_dev_state) { 1686e85d81a1SRussell King default: 16876b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 16886b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 16896b0da5c9SRussell King break; 16906b0da5c9SRussell King 16916b0da5c9SRussell King case SFP_DEV_DOWN: 16926b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 16936b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 16946b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1695e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1696e85d81a1SRussell King break; 169773970055SRussell King 1698e85d81a1SRussell King case SFP_DEV_UP: 16996b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17006b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17016b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1702e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1703e85d81a1SRussell King break; 1704e85d81a1SRussell King } 1705e85d81a1SRussell King } 170673970055SRussell King 1707d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1708d900954fSRussell King * the on-board EEPROM, and sets up the power level. 170973970055SRussell King */ 1710e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1711e85d81a1SRussell King { 1712b036a554SRussell King int err; 1713b036a554SRussell King 1714b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1715b036a554SRussell King if (event == SFP_E_REMOVE) { 1716d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1717d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1718b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1719b036a554SRussell King return; 1720b036a554SRussell King } 1721b036a554SRussell King 1722b036a554SRussell King /* Handle device detach globally */ 172373f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 172473f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1725b036a554SRussell King if (sfp->module_power_mW > 1000 && 1726b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1727b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 172873f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1729d2e816c0SRussell King return; 1730d2e816c0SRussell King } 1731d2e816c0SRussell King 173273970055SRussell King switch (sfp->sm_mod_state) { 173373970055SRussell King default: 1734e117be74SRussell King if (event == SFP_E_INSERT) { 1735d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1736e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1737e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1738e117be74SRussell King } 173973970055SRussell King break; 174073970055SRussell King 174173970055SRussell King case SFP_MOD_PROBE: 174273f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1743b036a554SRussell King if (event != SFP_E_TIMEOUT) 1744b036a554SRussell King break; 174573970055SRussell King 1746e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1747b036a554SRussell King if (err == -EAGAIN) { 1748e117be74SRussell King if (sfp->sm_mod_tries_init && 1749e117be74SRussell King --sfp->sm_mod_tries_init) { 1750e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1751b036a554SRussell King break; 1752e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1753e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1754e117be74SRussell King dev_warn(sfp->dev, 1755e117be74SRussell King "please wait, module slow to respond\n"); 1756e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1757e117be74SRussell King break; 1758e117be74SRussell King } 1759b036a554SRussell King } 1760b036a554SRussell King if (err < 0) { 1761b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1762b036a554SRussell King break; 1763b036a554SRussell King } 1764b036a554SRussell King 176538ecd706SRussell King err = sfp_hwmon_insert(sfp); 176638ecd706SRussell King if (err) 176738ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 176838ecd706SRussell King 176973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 177073f5e847SRussell King /* fall through */ 177173f5e847SRussell King case SFP_MOD_WAITDEV: 177273f5e847SRussell King /* Ensure that the device is attached before proceeding */ 177373f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 177473f5e847SRussell King break; 177573f5e847SRussell King 177673f5e847SRussell King /* Report the module insertion to the upstream device */ 177773f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 177873f5e847SRussell King if (err < 0) { 177973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 178073f5e847SRussell King break; 178173f5e847SRussell King } 178273f5e847SRussell King 1783b036a554SRussell King /* If this is a power level 1 module, we are done */ 1784b036a554SRussell King if (sfp->module_power_mW <= 1000) 1785b036a554SRussell King goto insert; 1786b036a554SRussell King 1787b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1788b036a554SRussell King /* fall through */ 1789b036a554SRussell King case SFP_MOD_HPOWER: 1790b036a554SRussell King /* Enable high power mode */ 1791b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 179273f5e847SRussell King if (err < 0) { 179373f5e847SRussell King if (err != -EAGAIN) { 179473f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 17950936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 179673f5e847SRussell King } else { 1797e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 179873f5e847SRussell King } 179973f5e847SRussell King break; 180073f5e847SRussell King } 180173f5e847SRussell King 180273f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 180373970055SRussell King break; 180473970055SRussell King 1805b036a554SRussell King case SFP_MOD_WAITPWR: 1806b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1807b036a554SRussell King if (event != SFP_E_TIMEOUT) 1808b036a554SRussell King break; 1809b036a554SRussell King 1810b036a554SRussell King insert: 18110936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 18123bb35261SJon Nettleton break; 1813b036a554SRussell King 181473970055SRussell King case SFP_MOD_PRESENT: 181573970055SRussell King case SFP_MOD_ERROR: 181673970055SRussell King break; 181773970055SRussell King } 181873970055SRussell King } 181973970055SRussell King 1820e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1821e85d81a1SRussell King { 1822eefa6f1fSRussell King unsigned long timeout; 1823eefa6f1fSRussell King 182473970055SRussell King /* Some events are global */ 182573970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 182673970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 182773970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 182873970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 182973970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 183073970055SRussell King sfp_sm_link_down(sfp); 183174c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 183274c551caSRussell King sfp_module_stop(sfp->sfp_bus); 183373970055SRussell King if (sfp->mod_phy) 183473970055SRussell King sfp_sm_phy_detach(sfp); 18351539e0d3SRussell King sfp_module_tx_disable(sfp); 1836f3c9a666SRussell King sfp_soft_stop_poll(sfp); 183773970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 183873970055SRussell King return; 183973970055SRussell King } 184073970055SRussell King 184173970055SRussell King /* The main state machine */ 184273970055SRussell King switch (sfp->sm_state) { 184373970055SRussell King case SFP_S_DOWN: 1844eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1845eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1846eefa6f1fSRussell King break; 1847eefa6f1fSRussell King 1848f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 1849f3c9a666SRussell King sfp_soft_start_poll(sfp); 1850f3c9a666SRussell King 1851f3c9a666SRussell King sfp_module_tx_enable(sfp); 1852eefa6f1fSRussell King 1853eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1854eefa6f1fSRussell King sfp->sm_retries = 5; 1855eefa6f1fSRussell King 1856eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1857eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1858eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1859eefa6f1fSRussell King */ 1860eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1861eefa6f1fSRussell King break; 1862eefa6f1fSRussell King 1863eefa6f1fSRussell King case SFP_S_WAIT: 1864eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1865eefa6f1fSRussell King break; 1866eefa6f1fSRussell King 1867eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 186826c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 186926c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 187026c97a2dSRussell King * initialise, which is indicated by TX_FAULT 187126c97a2dSRussell King * deasserting. 1872181f29daSRussell King */ 187326c97a2dSRussell King timeout = sfp->module_t_start_up; 1874eefa6f1fSRussell King if (timeout > T_WAIT) 1875eefa6f1fSRussell King timeout -= T_WAIT; 1876eefa6f1fSRussell King else 1877eefa6f1fSRussell King timeout = 1; 1878eefa6f1fSRussell King 1879eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1880eefa6f1fSRussell King } else { 1881eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1882eefa6f1fSRussell King * finished initialising. 1883eefa6f1fSRussell King */ 1884eefa6f1fSRussell King goto init_done; 1885181f29daSRussell King } 188673970055SRussell King break; 188773970055SRussell King 188873970055SRussell King case SFP_S_INIT: 1889d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 189026c97a2dSRussell King /* TX_FAULT is still asserted after t_init or 189126c97a2dSRussell King * or t_start_up, so assume there is a fault. 1892d23751a0SRussell King */ 1893d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1894d23751a0SRussell King sfp->sm_retries == 5); 1895d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 1896d23751a0SRussell King init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT 1897d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1898d23751a0SRussell King */ 1899d23751a0SRussell King sfp_sm_probe_for_phy(sfp); 190074c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 190174c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 190274c551caSRussell King break; 190374c551caSRussell King } 1904d23751a0SRussell King sfp_sm_link_check_los(sfp); 1905d23751a0SRussell King 1906d23751a0SRussell King /* Reset the fault retry count */ 1907d23751a0SRussell King sfp->sm_retries = 5; 1908d23751a0SRussell King } 1909d23751a0SRussell King break; 1910d23751a0SRussell King 1911d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1912d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1913d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 191426c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 1915d23751a0SRussell King } 191673970055SRussell King break; 191773970055SRussell King 191873970055SRussell King case SFP_S_WAIT_LOS: 191973970055SRussell King if (event == SFP_E_TX_FAULT) 192063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1921710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 192273970055SRussell King sfp_sm_link_up(sfp); 192373970055SRussell King break; 192473970055SRussell King 192573970055SRussell King case SFP_S_LINK_UP: 192673970055SRussell King if (event == SFP_E_TX_FAULT) { 192773970055SRussell King sfp_sm_link_down(sfp); 192863ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1929710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 193073970055SRussell King sfp_sm_link_down(sfp); 193173970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 193273970055SRussell King } 193373970055SRussell King break; 193473970055SRussell King 193573970055SRussell King case SFP_S_TX_FAULT: 193673970055SRussell King if (event == SFP_E_TIMEOUT) { 193773970055SRussell King sfp_module_tx_fault_reset(sfp); 193826c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 193973970055SRussell King } 194073970055SRussell King break; 194173970055SRussell King 194273970055SRussell King case SFP_S_REINIT: 194373970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 194463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 194573970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 194673970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 194773970055SRussell King sfp_sm_link_check_los(sfp); 194873970055SRussell King } 194973970055SRussell King break; 195073970055SRussell King 195173970055SRussell King case SFP_S_TX_DISABLE: 195273970055SRussell King break; 195373970055SRussell King } 1954e85d81a1SRussell King } 1955e85d81a1SRussell King 1956e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 1957e85d81a1SRussell King { 1958e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 1959e85d81a1SRussell King 1960e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 1961e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 1962e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 1963e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 1964e85d81a1SRussell King event_to_str(event)); 1965e85d81a1SRussell King 1966e85d81a1SRussell King sfp_sm_device(sfp, event); 19676b0da5c9SRussell King sfp_sm_module(sfp, event); 1968e85d81a1SRussell King sfp_sm_main(sfp, event); 196973970055SRussell King 19704005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 19714005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 19724005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 19734005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 197473970055SRussell King 197573970055SRussell King mutex_unlock(&sfp->sm_mutex); 197673970055SRussell King } 197773970055SRussell King 1978b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1979b5bfc21aSRussell King { 19806b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 1981b5bfc21aSRussell King } 1982b5bfc21aSRussell King 1983b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1984b5bfc21aSRussell King { 19856b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 1986b5bfc21aSRussell King } 1987b5bfc21aSRussell King 198873970055SRussell King static void sfp_start(struct sfp *sfp) 198973970055SRussell King { 199073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 199173970055SRussell King } 199273970055SRussell King 199373970055SRussell King static void sfp_stop(struct sfp *sfp) 199473970055SRussell King { 199573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 199673970055SRussell King } 199773970055SRussell King 199873970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 199973970055SRussell King { 200073970055SRussell King /* locking... and check module is present */ 200173970055SRussell King 2002ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2003ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 200473970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 200573970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 200673970055SRussell King } else { 200773970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 200873970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 200973970055SRussell King } 201073970055SRussell King return 0; 201173970055SRussell King } 201273970055SRussell King 201373970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 201473970055SRussell King u8 *data) 201573970055SRussell King { 201673970055SRussell King unsigned int first, last, len; 201773970055SRussell King int ret; 201873970055SRussell King 201973970055SRussell King if (ee->len == 0) 202073970055SRussell King return -EINVAL; 202173970055SRussell King 202273970055SRussell King first = ee->offset; 202373970055SRussell King last = ee->offset + ee->len; 202473970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 202573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 202673970055SRussell King len -= first; 202773970055SRussell King 20282794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 202973970055SRussell King if (ret < 0) 203073970055SRussell King return ret; 203173970055SRussell King 203273970055SRussell King first += len; 203373970055SRussell King data += len; 203473970055SRussell King } 20352794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 203673970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 203773970055SRussell King len -= first; 203873970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 203973970055SRussell King 20402794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 204173970055SRussell King if (ret < 0) 204273970055SRussell King return ret; 204373970055SRussell King } 204473970055SRussell King return 0; 204573970055SRussell King } 204673970055SRussell King 204773970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2048b5bfc21aSRussell King .attach = sfp_attach, 2049b5bfc21aSRussell King .detach = sfp_detach, 205073970055SRussell King .start = sfp_start, 205173970055SRussell King .stop = sfp_stop, 205273970055SRussell King .module_info = sfp_module_info, 205373970055SRussell King .module_eeprom = sfp_module_eeprom, 205473970055SRussell King }; 205573970055SRussell King 205673970055SRussell King static void sfp_timeout(struct work_struct *work) 205773970055SRussell King { 205873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 205973970055SRussell King 206073970055SRussell King rtnl_lock(); 206173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 206273970055SRussell King rtnl_unlock(); 206373970055SRussell King } 206473970055SRussell King 206573970055SRussell King static void sfp_check_state(struct sfp *sfp) 206673970055SRussell King { 206773970055SRussell King unsigned int state, i, changed; 206873970055SRussell King 20692158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 207073970055SRussell King state = sfp_get_state(sfp); 207173970055SRussell King changed = state ^ sfp->state; 207273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 207373970055SRussell King 207473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 207573970055SRussell King if (changed & BIT(i)) 207673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 207773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 207873970055SRussell King 207973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 208073970055SRussell King sfp->state = state; 208173970055SRussell King 208273970055SRussell King rtnl_lock(); 208373970055SRussell King if (changed & SFP_F_PRESENT) 208473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 208573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 208673970055SRussell King 208773970055SRussell King if (changed & SFP_F_TX_FAULT) 208873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 208973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 209073970055SRussell King 209173970055SRussell King if (changed & SFP_F_LOS) 209273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 209373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 209473970055SRussell King rtnl_unlock(); 20952158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 209673970055SRussell King } 209773970055SRussell King 209873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 209973970055SRussell King { 210073970055SRussell King struct sfp *sfp = data; 210173970055SRussell King 210273970055SRussell King sfp_check_state(sfp); 210373970055SRussell King 210473970055SRussell King return IRQ_HANDLED; 210573970055SRussell King } 210673970055SRussell King 210773970055SRussell King static void sfp_poll(struct work_struct *work) 210873970055SRussell King { 210973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 211073970055SRussell King 211173970055SRussell King sfp_check_state(sfp); 2112f3c9a666SRussell King 2113f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2114f3c9a666SRussell King sfp->need_poll) 211573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 211673970055SRussell King } 211773970055SRussell King 211873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 211973970055SRussell King { 212073970055SRussell King struct sfp *sfp; 212173970055SRussell King 212273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 212373970055SRussell King if (!sfp) 212473970055SRussell King return ERR_PTR(-ENOMEM); 212573970055SRussell King 212673970055SRussell King sfp->dev = dev; 212773970055SRussell King 212873970055SRussell King mutex_init(&sfp->sm_mutex); 21292158e856SRobert Hancock mutex_init(&sfp->st_mutex); 213073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 213173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 213273970055SRussell King 2133139d3a21SRussell King sfp_hwmon_init(sfp); 2134139d3a21SRussell King 213573970055SRussell King return sfp; 213673970055SRussell King } 213773970055SRussell King 213873970055SRussell King static void sfp_cleanup(void *data) 213973970055SRussell King { 214073970055SRussell King struct sfp *sfp = data; 214173970055SRussell King 2142139d3a21SRussell King sfp_hwmon_exit(sfp); 2143139d3a21SRussell King 214473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 214573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 214673970055SRussell King if (sfp->i2c_mii) { 214773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 214873970055SRussell King mdiobus_free(sfp->i2c_mii); 214973970055SRussell King } 215073970055SRussell King if (sfp->i2c) 215173970055SRussell King i2c_put_adapter(sfp->i2c); 215273970055SRussell King kfree(sfp); 215373970055SRussell King } 215473970055SRussell King 215573970055SRussell King static int sfp_probe(struct platform_device *pdev) 215673970055SRussell King { 2157259c8618SRussell King const struct sff_data *sff; 21587ce236faSRuslan Babayev struct i2c_adapter *i2c; 215973970055SRussell King struct sfp *sfp; 2160257c2559SRobert Hancock int err, i; 216173970055SRussell King 216273970055SRussell King sfp = sfp_alloc(&pdev->dev); 216373970055SRussell King if (IS_ERR(sfp)) 216473970055SRussell King return PTR_ERR(sfp); 216573970055SRussell King 216673970055SRussell King platform_set_drvdata(pdev, sfp); 216773970055SRussell King 216873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 216973970055SRussell King if (err < 0) 217073970055SRussell King return err; 217173970055SRussell King 2172259c8618SRussell King sff = sfp->type = &sfp_data; 2173259c8618SRussell King 217473970055SRussell King if (pdev->dev.of_node) { 217573970055SRussell King struct device_node *node = pdev->dev.of_node; 2176259c8618SRussell King const struct of_device_id *id; 217773970055SRussell King struct device_node *np; 217873970055SRussell King 2179259c8618SRussell King id = of_match_node(sfp_of_match, node); 2180259c8618SRussell King if (WARN_ON(!id)) 2181259c8618SRussell King return -EINVAL; 2182259c8618SRussell King 2183259c8618SRussell King sff = sfp->type = id->data; 2184259c8618SRussell King 218573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 218666ede1f9SAntoine Tenart if (!np) { 218766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 218866ede1f9SAntoine Tenart return -ENODEV; 218966ede1f9SAntoine Tenart } 219073970055SRussell King 219173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 219273970055SRussell King of_node_put(np); 21937ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 21947ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 21957ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 21967ce236faSRuslan Babayev struct fwnode_reference_args args; 21977ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 21987ce236faSRuslan Babayev int ret; 21997ce236faSRuslan Babayev 22007ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 22011086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 22027ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 22037ce236faSRuslan Babayev return -ENODEV; 22047ce236faSRuslan Babayev } 22057ce236faSRuslan Babayev 22067ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 22077ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 22087ce236faSRuslan Babayev } else { 22097ce236faSRuslan Babayev return -EINVAL; 22107ce236faSRuslan Babayev } 22117ce236faSRuslan Babayev 221273970055SRussell King if (!i2c) 221373970055SRussell King return -EPROBE_DEFER; 221473970055SRussell King 221573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 221673970055SRussell King if (err < 0) { 221773970055SRussell King i2c_put_adapter(i2c); 221873970055SRussell King return err; 221973970055SRussell King } 222073970055SRussell King 2221259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2222259c8618SRussell King if (sff->gpios & BIT(i)) { 222373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 222473970055SRussell King gpio_of_names[i], gpio_flags[i]); 222573970055SRussell King if (IS_ERR(sfp->gpio[i])) 222673970055SRussell King return PTR_ERR(sfp->gpio[i]); 222773970055SRussell King } 222873970055SRussell King 222973970055SRussell King sfp->get_state = sfp_gpio_get_state; 223073970055SRussell King sfp->set_state = sfp_gpio_set_state; 2231259c8618SRussell King 2232259c8618SRussell King /* Modules that have no detect signal are always present */ 2233259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2234259c8618SRussell King sfp->get_state = sff_gpio_get_state; 223573970055SRussell King 22363bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 22373bb35261SJon Nettleton &sfp->max_power_mW); 22383bb35261SJon Nettleton if (!sfp->max_power_mW) 22393bb35261SJon Nettleton sfp->max_power_mW = 1000; 22403bb35261SJon Nettleton 22413bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 22423bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 22433bb35261SJon Nettleton 224473970055SRussell King /* Get the initial state, and always signal TX disable, 224573970055SRussell King * since the network interface will not be up. 224673970055SRussell King */ 224773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 224873970055SRussell King 224973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 225073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 225173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 225273970055SRussell King sfp_set_state(sfp, sfp->state); 225373970055SRussell King sfp_module_tx_disable(sfp); 225473f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 225573f5e847SRussell King rtnl_lock(); 225673f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 225773f5e847SRussell King rtnl_unlock(); 225873f5e847SRussell King } 225973970055SRussell King 226073970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 226173970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 226273970055SRussell King continue; 226373970055SRussell King 2264257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2265257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 2266f3c9a666SRussell King sfp->need_poll = true; 226773970055SRussell King continue; 226873970055SRussell King } 226973970055SRussell King 2270257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2271257c2559SRobert Hancock NULL, sfp_irq, 227273970055SRussell King IRQF_ONESHOT | 227373970055SRussell King IRQF_TRIGGER_RISING | 227473970055SRussell King IRQF_TRIGGER_FALLING, 227573970055SRussell King dev_name(sfp->dev), sfp); 2276257c2559SRobert Hancock if (err) { 2277257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2278f3c9a666SRussell King sfp->need_poll = true; 227973970055SRussell King } 2280257c2559SRobert Hancock } 228173970055SRussell King 2282f3c9a666SRussell King if (sfp->need_poll) 228373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 228473970055SRussell King 2285a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2286a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2287a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2288a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2289a1f5d1f0SAntoine Tenart */ 2290a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2291a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2292a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2293a1f5d1f0SAntoine Tenart 2294b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2295b5bfc21aSRussell King if (!sfp->sfp_bus) 2296b5bfc21aSRussell King return -ENOMEM; 2297b5bfc21aSRussell King 229873970055SRussell King return 0; 229973970055SRussell King } 230073970055SRussell King 230173970055SRussell King static int sfp_remove(struct platform_device *pdev) 230273970055SRussell King { 230373970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 230473970055SRussell King 230573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 230673970055SRussell King 23070cb96b57SRussell King rtnl_lock(); 23080cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 23090cb96b57SRussell King rtnl_unlock(); 23100cb96b57SRussell King 231173970055SRussell King return 0; 231273970055SRussell King } 231373970055SRussell King 2314257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2315257c2559SRobert Hancock { 2316257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2317257c2559SRobert Hancock int i; 2318257c2559SRobert Hancock 2319257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2320257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2321257c2559SRobert Hancock continue; 2322257c2559SRobert Hancock 2323257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2324257c2559SRobert Hancock } 2325257c2559SRobert Hancock 2326257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2327257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2328257c2559SRobert Hancock } 2329257c2559SRobert Hancock 233073970055SRussell King static struct platform_driver sfp_driver = { 233173970055SRussell King .probe = sfp_probe, 233273970055SRussell King .remove = sfp_remove, 2333257c2559SRobert Hancock .shutdown = sfp_shutdown, 233473970055SRussell King .driver = { 233573970055SRussell King .name = "sfp", 233673970055SRussell King .of_match_table = sfp_of_match, 233773970055SRussell King }, 233873970055SRussell King }; 233973970055SRussell King 234073970055SRussell King static int sfp_init(void) 234173970055SRussell King { 234273970055SRussell King poll_jiffies = msecs_to_jiffies(100); 234373970055SRussell King 234473970055SRussell King return platform_driver_register(&sfp_driver); 234573970055SRussell King } 234673970055SRussell King module_init(sfp_init); 234773970055SRussell King 234873970055SRussell King static void sfp_exit(void) 234973970055SRussell King { 235073970055SRussell King platform_driver_unregister(&sfp_driver); 235173970055SRussell King } 235273970055SRussell King module_exit(sfp_exit); 235373970055SRussell King 235473970055SRussell King MODULE_ALIAS("platform:sfp"); 235573970055SRussell King MODULE_AUTHOR("Russell King"); 235673970055SRussell King MODULE_LICENSE("GPL v2"); 2357