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 17565ef2d5cSRussell King /* N_FAULT_INIT is the number of recovery attempts at module initialisation 17665ef2d5cSRussell King * time. If the TX_FAULT signal is not deasserted after this number of 17765ef2d5cSRussell King * attempts at clearing it, we decide that the module is faulty. 17865ef2d5cSRussell King * N_FAULT is the same but after the module has initialised. 17965ef2d5cSRussell King */ 18065ef2d5cSRussell King #define N_FAULT_INIT 5 18165ef2d5cSRussell King #define N_FAULT 5 18265ef2d5cSRussell King 18373970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 18473970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 18573970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 18673970055SRussell King * 187d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 188d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 18973970055SRussell King */ 190d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1913bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 192e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 193e117be74SRussell King #define R_PROBE_RETRY_INIT 10 194e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 195e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 19673970055SRussell King 197516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 19873970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 19973970055SRussell King */ 20073970055SRussell King #define SFP_PHY_ADDR 22 20173970055SRussell King 202259c8618SRussell King struct sff_data { 203259c8618SRussell King unsigned int gpios; 204259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 205259c8618SRussell King }; 206259c8618SRussell King 20773970055SRussell King struct sfp { 20873970055SRussell King struct device *dev; 20973970055SRussell King struct i2c_adapter *i2c; 21073970055SRussell King struct mii_bus *i2c_mii; 21173970055SRussell King struct sfp_bus *sfp_bus; 21273970055SRussell King struct phy_device *mod_phy; 213259c8618SRussell King const struct sff_data *type; 2143bb35261SJon Nettleton u32 max_power_mW; 21573970055SRussell King 21673970055SRussell King unsigned int (*get_state)(struct sfp *); 21773970055SRussell King void (*set_state)(struct sfp *, unsigned int); 21873970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 2193bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 22073970055SRussell King 22173970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 222257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 22373970055SRussell King 224f3c9a666SRussell King bool need_poll; 225f3c9a666SRussell King 2262158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 227f3c9a666SRussell King unsigned int state_soft_mask; 22873970055SRussell King unsigned int state; 22973970055SRussell King struct delayed_work poll; 23073970055SRussell King struct delayed_work timeout; 2312158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 23273970055SRussell King unsigned char sm_mod_state; 233e117be74SRussell King unsigned char sm_mod_tries_init; 234e117be74SRussell King unsigned char sm_mod_tries; 23573970055SRussell King unsigned char sm_dev_state; 23673970055SRussell King unsigned short sm_state; 237281e4eabSRussell King unsigned char sm_fault_retries; 23873970055SRussell King 23973970055SRussell King struct sfp_eeprom_id id; 240ed32abb1SRussell King unsigned int module_power_mW; 24126c97a2dSRussell King unsigned int module_t_start_up; 242ed32abb1SRussell King 2431323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2441323061aSAndrew Lunn struct sfp_diag diag; 245139d3a21SRussell King struct delayed_work hwmon_probe; 246139d3a21SRussell King unsigned int hwmon_tries; 2471323061aSAndrew Lunn struct device *hwmon_dev; 2481323061aSAndrew Lunn char *hwmon_name; 2491323061aSAndrew Lunn #endif 2501323061aSAndrew Lunn 25173970055SRussell King }; 25273970055SRussell King 253259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 254259c8618SRussell King { 2550fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFF_8472 && 256259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 257259c8618SRussell King } 258259c8618SRussell King 259259c8618SRussell King static const struct sff_data sff_data = { 260259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 261259c8618SRussell King .module_supported = sff_module_supported, 262259c8618SRussell King }; 263259c8618SRussell King 264259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 265259c8618SRussell King { 2660fbd26a9SRussell King return id->base.phys_id == SFF8024_ID_SFP && 267259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 268259c8618SRussell King } 269259c8618SRussell King 270259c8618SRussell King static const struct sff_data sfp_data = { 271259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 272259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 273259c8618SRussell King .module_supported = sfp_module_supported, 274259c8618SRussell King }; 275259c8618SRussell King 276259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 277259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 278259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 279259c8618SRussell King { }, 280259c8618SRussell King }; 281259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 282259c8618SRussell King 28373970055SRussell King static unsigned long poll_jiffies; 28473970055SRussell King 28573970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 28673970055SRussell King { 28773970055SRussell King unsigned int i, state, v; 28873970055SRussell King 28973970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 29073970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 29173970055SRussell King continue; 29273970055SRussell King 29373970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 29473970055SRussell King if (v) 29573970055SRussell King state |= BIT(i); 29673970055SRussell King } 29773970055SRussell King 29873970055SRussell King return state; 29973970055SRussell King } 30073970055SRussell King 301259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 302259c8618SRussell King { 303259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 304259c8618SRussell King } 305259c8618SRussell King 30673970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 30773970055SRussell King { 30873970055SRussell King if (state & SFP_F_PRESENT) { 30973970055SRussell King /* If the module is present, drive the signals */ 31073970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 31173970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 31273970055SRussell King state & SFP_F_TX_DISABLE); 31373970055SRussell King if (state & SFP_F_RATE_SELECT) 31473970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 31573970055SRussell King state & SFP_F_RATE_SELECT); 31673970055SRussell King } else { 31773970055SRussell King /* Otherwise, let them float to the pull-ups */ 31873970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 31973970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 32073970055SRussell King if (state & SFP_F_RATE_SELECT) 32173970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 32273970055SRussell King } 32373970055SRussell King } 32473970055SRussell King 3253bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3263bb35261SJon Nettleton size_t len) 32773970055SRussell King { 32873970055SRussell King struct i2c_msg msgs[2]; 3293bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 33028e74a7cSRussell King size_t this_len; 33173970055SRussell King int ret; 33273970055SRussell King 33373970055SRussell King msgs[0].addr = bus_addr; 33473970055SRussell King msgs[0].flags = 0; 33573970055SRussell King msgs[0].len = 1; 33673970055SRussell King msgs[0].buf = &dev_addr; 33773970055SRussell King msgs[1].addr = bus_addr; 33873970055SRussell King msgs[1].flags = I2C_M_RD; 33973970055SRussell King msgs[1].len = len; 34073970055SRussell King msgs[1].buf = buf; 34173970055SRussell King 34228e74a7cSRussell King while (len) { 34328e74a7cSRussell King this_len = len; 34428e74a7cSRussell King if (this_len > 16) 34528e74a7cSRussell King this_len = 16; 34628e74a7cSRussell King 34728e74a7cSRussell King msgs[1].len = this_len; 34828e74a7cSRussell King 3493bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 35073970055SRussell King if (ret < 0) 35173970055SRussell King return ret; 35273970055SRussell King 35328e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 35428e74a7cSRussell King break; 35528e74a7cSRussell King 35628e74a7cSRussell King msgs[1].buf += this_len; 35728e74a7cSRussell King dev_addr += this_len; 35828e74a7cSRussell King len -= this_len; 35928e74a7cSRussell King } 36028e74a7cSRussell King 36128e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 36273970055SRussell King } 36373970055SRussell King 3643bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 36573970055SRussell King size_t len) 36673970055SRussell King { 3673bb35261SJon Nettleton struct i2c_msg msgs[1]; 3683bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3693bb35261SJon Nettleton int ret; 3703bb35261SJon Nettleton 3713bb35261SJon Nettleton msgs[0].addr = bus_addr; 3723bb35261SJon Nettleton msgs[0].flags = 0; 3733bb35261SJon Nettleton msgs[0].len = 1 + len; 3743bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3753bb35261SJon Nettleton if (!msgs[0].buf) 3763bb35261SJon Nettleton return -ENOMEM; 3773bb35261SJon Nettleton 3783bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3793bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3803bb35261SJon Nettleton 3813bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3823bb35261SJon Nettleton 3833bb35261SJon Nettleton kfree(msgs[0].buf); 3843bb35261SJon Nettleton 3853bb35261SJon Nettleton if (ret < 0) 3863bb35261SJon Nettleton return ret; 3873bb35261SJon Nettleton 3883bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 38973970055SRussell King } 39073970055SRussell King 39173970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 39273970055SRussell King { 39373970055SRussell King struct mii_bus *i2c_mii; 39473970055SRussell King int ret; 39573970055SRussell King 39673970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 39773970055SRussell King return -EINVAL; 39873970055SRussell King 39973970055SRussell King sfp->i2c = i2c; 40073970055SRussell King sfp->read = sfp_i2c_read; 4013bb35261SJon Nettleton sfp->write = sfp_i2c_write; 40273970055SRussell King 40373970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 40473970055SRussell King if (IS_ERR(i2c_mii)) 40573970055SRussell King return PTR_ERR(i2c_mii); 40673970055SRussell King 40773970055SRussell King i2c_mii->name = "SFP I2C Bus"; 40873970055SRussell King i2c_mii->phy_mask = ~0; 40973970055SRussell King 41073970055SRussell King ret = mdiobus_register(i2c_mii); 41173970055SRussell King if (ret < 0) { 41273970055SRussell King mdiobus_free(i2c_mii); 41373970055SRussell King return ret; 41473970055SRussell King } 41573970055SRussell King 41673970055SRussell King sfp->i2c_mii = i2c_mii; 41773970055SRussell King 41873970055SRussell King return 0; 41973970055SRussell King } 42073970055SRussell King 42173970055SRussell King /* Interface */ 42273970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 42373970055SRussell King { 42473970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 42573970055SRussell King } 42673970055SRussell King 4273bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4283bb35261SJon Nettleton { 4293bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4303bb35261SJon Nettleton } 4313bb35261SJon Nettleton 432f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 433f3c9a666SRussell King { 434f3c9a666SRussell King unsigned int state = 0; 435f3c9a666SRussell King u8 status; 436f3c9a666SRussell King 437f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 438f3c9a666SRussell King sizeof(status)) { 439f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 440f3c9a666SRussell King state |= SFP_F_LOS; 441f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 442f3c9a666SRussell King state |= SFP_F_TX_FAULT; 443f3c9a666SRussell King } 444f3c9a666SRussell King 445f3c9a666SRussell King return state & sfp->state_soft_mask; 446f3c9a666SRussell King } 447f3c9a666SRussell King 448f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 449f3c9a666SRussell King { 450f3c9a666SRussell King u8 status; 451f3c9a666SRussell King 452f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 453f3c9a666SRussell King sizeof(status)) { 454f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 455f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 456f3c9a666SRussell King else 457f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 458f3c9a666SRussell King 459f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 460f3c9a666SRussell King } 461f3c9a666SRussell King } 462f3c9a666SRussell King 463f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 464f3c9a666SRussell King { 465f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 466f3c9a666SRussell King 467f3c9a666SRussell King sfp->state_soft_mask = 0; 468f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 469f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 470f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 471f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 472f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 473f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 474f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 475f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 476f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 477f3c9a666SRussell King 478f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 479f3c9a666SRussell King !sfp->need_poll) 480f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 481f3c9a666SRussell King } 482f3c9a666SRussell King 483f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 484f3c9a666SRussell King { 485f3c9a666SRussell King sfp->state_soft_mask = 0; 486f3c9a666SRussell King } 487f3c9a666SRussell King 488f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 489f3c9a666SRussell King { 490f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 491f3c9a666SRussell King 492f3c9a666SRussell King if (state & SFP_F_PRESENT && 493f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 494f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 495f3c9a666SRussell King 496f3c9a666SRussell King return state; 497f3c9a666SRussell King } 498f3c9a666SRussell King 499f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 500f3c9a666SRussell King { 501f3c9a666SRussell King sfp->set_state(sfp, state); 502f3c9a666SRussell King 503f3c9a666SRussell King if (state & SFP_F_PRESENT && 504f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 505f3c9a666SRussell King sfp_soft_set_state(sfp, state); 506f3c9a666SRussell King } 507f3c9a666SRussell King 50873970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 50973970055SRussell King { 51073970055SRussell King u8 *p, check; 51173970055SRussell King 51273970055SRussell King for (p = buf, check = 0; len; p++, len--) 51373970055SRussell King check += *p; 51473970055SRussell King 51573970055SRussell King return check; 51673970055SRussell King } 51773970055SRussell King 5181323061aSAndrew Lunn /* hwmon */ 5191323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 5201323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5211323061aSAndrew Lunn enum hwmon_sensor_types type, 5221323061aSAndrew Lunn u32 attr, int channel) 5231323061aSAndrew Lunn { 5241323061aSAndrew Lunn const struct sfp *sfp = data; 5251323061aSAndrew Lunn 5261323061aSAndrew Lunn switch (type) { 5271323061aSAndrew Lunn case hwmon_temp: 5281323061aSAndrew Lunn switch (attr) { 5291323061aSAndrew Lunn case hwmon_temp_min_alarm: 5301323061aSAndrew Lunn case hwmon_temp_max_alarm: 5311323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5321323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5331323061aSAndrew Lunn case hwmon_temp_min: 5341323061aSAndrew Lunn case hwmon_temp_max: 5351323061aSAndrew Lunn case hwmon_temp_lcrit: 5361323061aSAndrew Lunn case hwmon_temp_crit: 537a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 538a33710bdSAndrew Lunn return 0; 539a33710bdSAndrew Lunn /* fall through */ 540a33710bdSAndrew Lunn case hwmon_temp_input: 541c1236979SAndrew Lunn case hwmon_temp_label: 5421323061aSAndrew Lunn return 0444; 5431323061aSAndrew Lunn default: 5441323061aSAndrew Lunn return 0; 5451323061aSAndrew Lunn } 5461323061aSAndrew Lunn case hwmon_in: 5471323061aSAndrew Lunn switch (attr) { 5481323061aSAndrew Lunn case hwmon_in_min_alarm: 5491323061aSAndrew Lunn case hwmon_in_max_alarm: 5501323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5511323061aSAndrew Lunn case hwmon_in_crit_alarm: 5521323061aSAndrew Lunn case hwmon_in_min: 5531323061aSAndrew Lunn case hwmon_in_max: 5541323061aSAndrew Lunn case hwmon_in_lcrit: 5551323061aSAndrew Lunn case hwmon_in_crit: 556a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 557a33710bdSAndrew Lunn return 0; 558a33710bdSAndrew Lunn /* fall through */ 559a33710bdSAndrew Lunn case hwmon_in_input: 560c1236979SAndrew Lunn case hwmon_in_label: 5611323061aSAndrew Lunn return 0444; 5621323061aSAndrew Lunn default: 5631323061aSAndrew Lunn return 0; 5641323061aSAndrew Lunn } 5651323061aSAndrew Lunn case hwmon_curr: 5661323061aSAndrew Lunn switch (attr) { 5671323061aSAndrew Lunn case hwmon_curr_min_alarm: 5681323061aSAndrew Lunn case hwmon_curr_max_alarm: 5691323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5701323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5711323061aSAndrew Lunn case hwmon_curr_min: 5721323061aSAndrew Lunn case hwmon_curr_max: 5731323061aSAndrew Lunn case hwmon_curr_lcrit: 5741323061aSAndrew Lunn case hwmon_curr_crit: 575a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 576a33710bdSAndrew Lunn return 0; 577a33710bdSAndrew Lunn /* fall through */ 578a33710bdSAndrew Lunn case hwmon_curr_input: 579c1236979SAndrew Lunn case hwmon_curr_label: 5801323061aSAndrew Lunn return 0444; 5811323061aSAndrew Lunn default: 5821323061aSAndrew Lunn return 0; 5831323061aSAndrew Lunn } 5841323061aSAndrew Lunn case hwmon_power: 5851323061aSAndrew Lunn /* External calibration of receive power requires 5861323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 5871323061aSAndrew Lunn * is not easy, so just skip it. If the module does 5881323061aSAndrew Lunn * not require external calibration, we can however 5891323061aSAndrew Lunn * show receiver power, since FP is then not needed. 5901323061aSAndrew Lunn */ 5911323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 5921323061aSAndrew Lunn channel == 1) 5931323061aSAndrew Lunn return 0; 5941323061aSAndrew Lunn switch (attr) { 5951323061aSAndrew Lunn case hwmon_power_min_alarm: 5961323061aSAndrew Lunn case hwmon_power_max_alarm: 5971323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 5981323061aSAndrew Lunn case hwmon_power_crit_alarm: 5991323061aSAndrew Lunn case hwmon_power_min: 6001323061aSAndrew Lunn case hwmon_power_max: 6011323061aSAndrew Lunn case hwmon_power_lcrit: 6021323061aSAndrew Lunn case hwmon_power_crit: 603a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 604a33710bdSAndrew Lunn return 0; 605a33710bdSAndrew Lunn /* fall through */ 606a33710bdSAndrew Lunn case hwmon_power_input: 607c1236979SAndrew Lunn case hwmon_power_label: 6081323061aSAndrew Lunn return 0444; 6091323061aSAndrew Lunn default: 6101323061aSAndrew Lunn return 0; 6111323061aSAndrew Lunn } 6121323061aSAndrew Lunn default: 6131323061aSAndrew Lunn return 0; 6141323061aSAndrew Lunn } 6151323061aSAndrew Lunn } 6161323061aSAndrew Lunn 6171323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 6181323061aSAndrew Lunn { 6191323061aSAndrew Lunn __be16 val; 6201323061aSAndrew Lunn int err; 6211323061aSAndrew Lunn 6221323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6231323061aSAndrew Lunn if (err < 0) 6241323061aSAndrew Lunn return err; 6251323061aSAndrew Lunn 6261323061aSAndrew Lunn *value = be16_to_cpu(val); 6271323061aSAndrew Lunn 6281323061aSAndrew Lunn return 0; 6291323061aSAndrew Lunn } 6301323061aSAndrew Lunn 6311323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6321323061aSAndrew Lunn { 6330cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6341323061aSAndrew Lunn } 6351323061aSAndrew Lunn 6361323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6371323061aSAndrew Lunn long *value) 6381323061aSAndrew Lunn { 6391323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6401323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6411323061aSAndrew Lunn } 6421323061aSAndrew Lunn 6431323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6441323061aSAndrew Lunn { 6451323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6461323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6471323061aSAndrew Lunn 6481323061aSAndrew Lunn if (*value >= 0x8000) 6491323061aSAndrew Lunn *value -= 0x10000; 6501323061aSAndrew Lunn 6511323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6521323061aSAndrew Lunn } 6531323061aSAndrew Lunn 6541323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6551323061aSAndrew Lunn { 6561323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6571323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6581323061aSAndrew Lunn 6591323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6601323061aSAndrew Lunn } 6611323061aSAndrew Lunn 6621323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6631323061aSAndrew Lunn { 6641323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6651323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6681323061aSAndrew Lunn } 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6711323061aSAndrew Lunn { 6721323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6731323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6741323061aSAndrew Lunn 6751323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6761323061aSAndrew Lunn } 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 6791323061aSAndrew Lunn { 6801323061aSAndrew Lunn int err; 6811323061aSAndrew Lunn 6821323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6831323061aSAndrew Lunn if (err < 0) 6841323061aSAndrew Lunn return err; 6851323061aSAndrew Lunn 6861323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6871323061aSAndrew Lunn 6881323061aSAndrew Lunn return 0; 6891323061aSAndrew Lunn } 6901323061aSAndrew Lunn 6911323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 6921323061aSAndrew Lunn { 6931323061aSAndrew Lunn int err; 6941323061aSAndrew Lunn 6951323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6961323061aSAndrew Lunn if (err < 0) 6971323061aSAndrew Lunn return err; 6981323061aSAndrew Lunn 6991323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7001323061aSAndrew Lunn 7011323061aSAndrew Lunn return 0; 7021323061aSAndrew Lunn } 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 7051323061aSAndrew Lunn { 7061323061aSAndrew Lunn int err; 7071323061aSAndrew Lunn 7081323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7091323061aSAndrew Lunn if (err < 0) 7101323061aSAndrew Lunn return err; 7111323061aSAndrew Lunn 7121323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7131323061aSAndrew Lunn 7141323061aSAndrew Lunn return 0; 7151323061aSAndrew Lunn } 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 7181323061aSAndrew Lunn { 7191323061aSAndrew Lunn int err; 7201323061aSAndrew Lunn 7211323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7221323061aSAndrew Lunn if (err < 0) 7231323061aSAndrew Lunn return err; 7241323061aSAndrew Lunn 7251323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn return 0; 7281323061aSAndrew Lunn } 7291323061aSAndrew Lunn 7301323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7311323061aSAndrew Lunn { 7321323061aSAndrew Lunn int err; 7331323061aSAndrew Lunn 7341323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7351323061aSAndrew Lunn if (err < 0) 7361323061aSAndrew Lunn return err; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7391323061aSAndrew Lunn 7401323061aSAndrew Lunn return 0; 7411323061aSAndrew Lunn } 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7441323061aSAndrew Lunn { 7451323061aSAndrew Lunn u8 status; 7461323061aSAndrew Lunn int err; 7471323061aSAndrew Lunn 7481323061aSAndrew Lunn switch (attr) { 7491323061aSAndrew Lunn case hwmon_temp_input: 7501323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7511323061aSAndrew Lunn 7521323061aSAndrew Lunn case hwmon_temp_lcrit: 7531323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7541323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7551323061aSAndrew Lunn return 0; 7561323061aSAndrew Lunn 7571323061aSAndrew Lunn case hwmon_temp_min: 7581323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7591323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7601323061aSAndrew Lunn return 0; 7611323061aSAndrew Lunn case hwmon_temp_max: 7621323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7631323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7641323061aSAndrew Lunn return 0; 7651323061aSAndrew Lunn 7661323061aSAndrew Lunn case hwmon_temp_crit: 7671323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7681323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7691323061aSAndrew Lunn return 0; 7701323061aSAndrew Lunn 7711323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7721323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7731323061aSAndrew Lunn if (err < 0) 7741323061aSAndrew Lunn return err; 7751323061aSAndrew Lunn 7761323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7771323061aSAndrew Lunn return 0; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn case hwmon_temp_min_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_LOW); 7851323061aSAndrew Lunn return 0; 7861323061aSAndrew Lunn 7871323061aSAndrew Lunn case hwmon_temp_max_alarm: 7881323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7891323061aSAndrew Lunn if (err < 0) 7901323061aSAndrew Lunn return err; 7911323061aSAndrew Lunn 7921323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 7931323061aSAndrew Lunn return 0; 7941323061aSAndrew Lunn 7951323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7961323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7971323061aSAndrew Lunn if (err < 0) 7981323061aSAndrew Lunn return err; 7991323061aSAndrew Lunn 8001323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 8011323061aSAndrew Lunn return 0; 8021323061aSAndrew Lunn default: 8031323061aSAndrew Lunn return -EOPNOTSUPP; 8041323061aSAndrew Lunn } 8051323061aSAndrew Lunn 8061323061aSAndrew Lunn return -EOPNOTSUPP; 8071323061aSAndrew Lunn } 8081323061aSAndrew Lunn 8091323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 8101323061aSAndrew Lunn { 8111323061aSAndrew Lunn u8 status; 8121323061aSAndrew Lunn int err; 8131323061aSAndrew Lunn 8141323061aSAndrew Lunn switch (attr) { 8151323061aSAndrew Lunn case hwmon_in_input: 8161323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 8171323061aSAndrew Lunn 8181323061aSAndrew Lunn case hwmon_in_lcrit: 8191323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 8201323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8211323061aSAndrew Lunn return 0; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn case hwmon_in_min: 8241323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8251323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8261323061aSAndrew Lunn return 0; 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn case hwmon_in_max: 8291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8301323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8311323061aSAndrew Lunn return 0; 8321323061aSAndrew Lunn 8331323061aSAndrew Lunn case hwmon_in_crit: 8341323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8351323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8361323061aSAndrew Lunn return 0; 8371323061aSAndrew Lunn 8381323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8391323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8401323061aSAndrew Lunn if (err < 0) 8411323061aSAndrew Lunn return err; 8421323061aSAndrew Lunn 8431323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8441323061aSAndrew Lunn return 0; 8451323061aSAndrew Lunn 8461323061aSAndrew Lunn case hwmon_in_min_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_LOW); 8521323061aSAndrew Lunn return 0; 8531323061aSAndrew Lunn 8541323061aSAndrew Lunn case hwmon_in_max_alarm: 8551323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8561323061aSAndrew Lunn if (err < 0) 8571323061aSAndrew Lunn return err; 8581323061aSAndrew Lunn 8591323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8601323061aSAndrew Lunn return 0; 8611323061aSAndrew Lunn 8621323061aSAndrew Lunn case hwmon_in_crit_alarm: 8631323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8641323061aSAndrew Lunn if (err < 0) 8651323061aSAndrew Lunn return err; 8661323061aSAndrew Lunn 8671323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8681323061aSAndrew Lunn return 0; 8691323061aSAndrew Lunn default: 8701323061aSAndrew Lunn return -EOPNOTSUPP; 8711323061aSAndrew Lunn } 8721323061aSAndrew Lunn 8731323061aSAndrew Lunn return -EOPNOTSUPP; 8741323061aSAndrew Lunn } 8751323061aSAndrew Lunn 8761323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8771323061aSAndrew Lunn { 8781323061aSAndrew Lunn u8 status; 8791323061aSAndrew Lunn int err; 8801323061aSAndrew Lunn 8811323061aSAndrew Lunn switch (attr) { 8821323061aSAndrew Lunn case hwmon_curr_input: 8831323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 8841323061aSAndrew Lunn 8851323061aSAndrew Lunn case hwmon_curr_lcrit: 8861323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 8871323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8881323061aSAndrew Lunn return 0; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn case hwmon_curr_min: 8911323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 8921323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8931323061aSAndrew Lunn return 0; 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn case hwmon_curr_max: 8961323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 8971323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8981323061aSAndrew Lunn return 0; 8991323061aSAndrew Lunn 9001323061aSAndrew Lunn case hwmon_curr_crit: 9011323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 9021323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 9031323061aSAndrew Lunn return 0; 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 9061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9071323061aSAndrew Lunn if (err < 0) 9081323061aSAndrew Lunn return err; 9091323061aSAndrew Lunn 9101323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 9111323061aSAndrew Lunn return 0; 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn case hwmon_curr_min_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_LOW); 9191323061aSAndrew Lunn return 0; 9201323061aSAndrew Lunn 9211323061aSAndrew Lunn case hwmon_curr_max_alarm: 9221323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9231323061aSAndrew Lunn if (err < 0) 9241323061aSAndrew Lunn return err; 9251323061aSAndrew Lunn 9261323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9271323061aSAndrew Lunn return 0; 9281323061aSAndrew Lunn 9291323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9301323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9311323061aSAndrew Lunn if (err < 0) 9321323061aSAndrew Lunn return err; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9351323061aSAndrew Lunn return 0; 9361323061aSAndrew Lunn default: 9371323061aSAndrew Lunn return -EOPNOTSUPP; 9381323061aSAndrew Lunn } 9391323061aSAndrew Lunn 9401323061aSAndrew Lunn return -EOPNOTSUPP; 9411323061aSAndrew Lunn } 9421323061aSAndrew Lunn 9431323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9441323061aSAndrew Lunn { 9451323061aSAndrew Lunn u8 status; 9461323061aSAndrew Lunn int err; 9471323061aSAndrew Lunn 9481323061aSAndrew Lunn switch (attr) { 9491323061aSAndrew Lunn case hwmon_power_input: 9501323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9511323061aSAndrew Lunn 9521323061aSAndrew Lunn case hwmon_power_lcrit: 9531323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9541323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9551323061aSAndrew Lunn return 0; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn case hwmon_power_min: 9581323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9591323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9601323061aSAndrew Lunn return 0; 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn case hwmon_power_max: 9631323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9641323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9651323061aSAndrew Lunn return 0; 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn case hwmon_power_crit: 9681323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9691323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9701323061aSAndrew Lunn return 0; 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9741323061aSAndrew Lunn if (err < 0) 9751323061aSAndrew Lunn return err; 9761323061aSAndrew Lunn 9771323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 9781323061aSAndrew Lunn return 0; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn case hwmon_power_min_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_LOW); 9861323061aSAndrew Lunn return 0; 9871323061aSAndrew Lunn 9881323061aSAndrew Lunn case hwmon_power_max_alarm: 9891323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9901323061aSAndrew Lunn if (err < 0) 9911323061aSAndrew Lunn return err; 9921323061aSAndrew Lunn 9931323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 9941323061aSAndrew Lunn return 0; 9951323061aSAndrew Lunn 9961323061aSAndrew Lunn case hwmon_power_crit_alarm: 9971323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9981323061aSAndrew Lunn if (err < 0) 9991323061aSAndrew Lunn return err; 10001323061aSAndrew Lunn 10011323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 10021323061aSAndrew Lunn return 0; 10031323061aSAndrew Lunn default: 10041323061aSAndrew Lunn return -EOPNOTSUPP; 10051323061aSAndrew Lunn } 10061323061aSAndrew Lunn 10071323061aSAndrew Lunn return -EOPNOTSUPP; 10081323061aSAndrew Lunn } 10091323061aSAndrew Lunn 10101323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 10111323061aSAndrew Lunn { 10121323061aSAndrew Lunn u8 status; 10131323061aSAndrew Lunn int err; 10141323061aSAndrew Lunn 10151323061aSAndrew Lunn switch (attr) { 10161323061aSAndrew Lunn case hwmon_power_input: 10171323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 10181323061aSAndrew Lunn 10191323061aSAndrew Lunn case hwmon_power_lcrit: 10201323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10211323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10221323061aSAndrew Lunn return 0; 10231323061aSAndrew Lunn 10241323061aSAndrew Lunn case hwmon_power_min: 10251323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10261323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10271323061aSAndrew Lunn return 0; 10281323061aSAndrew Lunn 10291323061aSAndrew Lunn case hwmon_power_max: 10301323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10311323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10321323061aSAndrew Lunn return 0; 10331323061aSAndrew Lunn 10341323061aSAndrew Lunn case hwmon_power_crit: 10351323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10361323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10371323061aSAndrew Lunn return 0; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10411323061aSAndrew Lunn if (err < 0) 10421323061aSAndrew Lunn return err; 10431323061aSAndrew Lunn 10441323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10451323061aSAndrew Lunn return 0; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn case hwmon_power_min_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_LOW); 10531323061aSAndrew Lunn return 0; 10541323061aSAndrew Lunn 10551323061aSAndrew Lunn case hwmon_power_max_alarm: 10561323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10571323061aSAndrew Lunn if (err < 0) 10581323061aSAndrew Lunn return err; 10591323061aSAndrew Lunn 10601323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10611323061aSAndrew Lunn return 0; 10621323061aSAndrew Lunn 10631323061aSAndrew Lunn case hwmon_power_crit_alarm: 10641323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10651323061aSAndrew Lunn if (err < 0) 10661323061aSAndrew Lunn return err; 10671323061aSAndrew Lunn 10681323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10691323061aSAndrew Lunn return 0; 10701323061aSAndrew Lunn default: 10711323061aSAndrew Lunn return -EOPNOTSUPP; 10721323061aSAndrew Lunn } 10731323061aSAndrew Lunn 10741323061aSAndrew Lunn return -EOPNOTSUPP; 10751323061aSAndrew Lunn } 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 10781323061aSAndrew Lunn u32 attr, int channel, long *value) 10791323061aSAndrew Lunn { 10801323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn switch (type) { 10831323061aSAndrew Lunn case hwmon_temp: 10841323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 10851323061aSAndrew Lunn case hwmon_in: 10861323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 10871323061aSAndrew Lunn case hwmon_curr: 10881323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 10891323061aSAndrew Lunn case hwmon_power: 10901323061aSAndrew Lunn switch (channel) { 10911323061aSAndrew Lunn case 0: 10921323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 10931323061aSAndrew Lunn case 1: 10941323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 10951323061aSAndrew Lunn default: 10961323061aSAndrew Lunn return -EOPNOTSUPP; 10971323061aSAndrew Lunn } 10981323061aSAndrew Lunn default: 10991323061aSAndrew Lunn return -EOPNOTSUPP; 11001323061aSAndrew Lunn } 11011323061aSAndrew Lunn } 11021323061aSAndrew Lunn 1103c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1104c1236979SAndrew Lunn "TX_power", 1105c1236979SAndrew Lunn "RX_power", 1106c1236979SAndrew Lunn }; 1107c1236979SAndrew Lunn 1108c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1109c1236979SAndrew Lunn enum hwmon_sensor_types type, 1110c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1111c1236979SAndrew Lunn { 1112c1236979SAndrew Lunn switch (type) { 1113c1236979SAndrew Lunn case hwmon_curr: 1114c1236979SAndrew Lunn switch (attr) { 1115c1236979SAndrew Lunn case hwmon_curr_label: 1116c1236979SAndrew Lunn *str = "bias"; 1117c1236979SAndrew Lunn return 0; 1118c1236979SAndrew Lunn default: 1119c1236979SAndrew Lunn return -EOPNOTSUPP; 1120c1236979SAndrew Lunn } 1121c1236979SAndrew Lunn break; 1122c1236979SAndrew Lunn case hwmon_temp: 1123c1236979SAndrew Lunn switch (attr) { 1124c1236979SAndrew Lunn case hwmon_temp_label: 1125c1236979SAndrew Lunn *str = "temperature"; 1126c1236979SAndrew Lunn return 0; 1127c1236979SAndrew Lunn default: 1128c1236979SAndrew Lunn return -EOPNOTSUPP; 1129c1236979SAndrew Lunn } 1130c1236979SAndrew Lunn break; 1131c1236979SAndrew Lunn case hwmon_in: 1132c1236979SAndrew Lunn switch (attr) { 1133c1236979SAndrew Lunn case hwmon_in_label: 1134c1236979SAndrew Lunn *str = "VCC"; 1135c1236979SAndrew Lunn return 0; 1136c1236979SAndrew Lunn default: 1137c1236979SAndrew Lunn return -EOPNOTSUPP; 1138c1236979SAndrew Lunn } 1139c1236979SAndrew Lunn break; 1140c1236979SAndrew Lunn case hwmon_power: 1141c1236979SAndrew Lunn switch (attr) { 1142c1236979SAndrew Lunn case hwmon_power_label: 1143c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1144c1236979SAndrew Lunn return 0; 1145c1236979SAndrew Lunn default: 1146c1236979SAndrew Lunn return -EOPNOTSUPP; 1147c1236979SAndrew Lunn } 1148c1236979SAndrew Lunn break; 1149c1236979SAndrew Lunn default: 1150c1236979SAndrew Lunn return -EOPNOTSUPP; 1151c1236979SAndrew Lunn } 1152c1236979SAndrew Lunn 1153c1236979SAndrew Lunn return -EOPNOTSUPP; 1154c1236979SAndrew Lunn } 1155c1236979SAndrew Lunn 11561323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11571323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11581323061aSAndrew Lunn .read = sfp_hwmon_read, 1159c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11601323061aSAndrew Lunn }; 11611323061aSAndrew Lunn 11621323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11631323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11641323061aSAndrew Lunn 0, 11651323061aSAndrew Lunn }; 11661323061aSAndrew Lunn 11671323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11681323061aSAndrew Lunn .type = hwmon_chip, 11691323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11701323061aSAndrew Lunn }; 11711323061aSAndrew Lunn 11721323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11731323061aSAndrew Lunn HWMON_T_INPUT | 11741323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11751323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11761323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1177c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1178c1236979SAndrew Lunn HWMON_T_LABEL, 11791323061aSAndrew Lunn 0, 11801323061aSAndrew Lunn }; 11811323061aSAndrew Lunn 11821323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 11831323061aSAndrew Lunn .type = hwmon_temp, 11841323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 11851323061aSAndrew Lunn }; 11861323061aSAndrew Lunn 11871323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 11881323061aSAndrew Lunn HWMON_I_INPUT | 11891323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 11901323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 11911323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1192c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1193c1236979SAndrew Lunn HWMON_I_LABEL, 11941323061aSAndrew Lunn 0, 11951323061aSAndrew Lunn }; 11961323061aSAndrew Lunn 11971323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 11981323061aSAndrew Lunn .type = hwmon_in, 11991323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 12001323061aSAndrew Lunn }; 12011323061aSAndrew Lunn 12021323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 12031323061aSAndrew Lunn HWMON_C_INPUT | 12041323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 12051323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 12061323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1207c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1208c1236979SAndrew Lunn HWMON_C_LABEL, 12091323061aSAndrew Lunn 0, 12101323061aSAndrew Lunn }; 12111323061aSAndrew Lunn 12121323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 12131323061aSAndrew Lunn .type = hwmon_curr, 12141323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 12151323061aSAndrew Lunn }; 12161323061aSAndrew Lunn 12171323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 12181323061aSAndrew Lunn /* Transmit power */ 12191323061aSAndrew Lunn HWMON_P_INPUT | 12201323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12211323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12221323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1223c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1224c1236979SAndrew Lunn HWMON_P_LABEL, 12251323061aSAndrew Lunn /* Receive power */ 12261323061aSAndrew Lunn HWMON_P_INPUT | 12271323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12281323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12291323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1230c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1231c1236979SAndrew Lunn HWMON_P_LABEL, 12321323061aSAndrew Lunn 0, 12331323061aSAndrew Lunn }; 12341323061aSAndrew Lunn 12351323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12361323061aSAndrew Lunn .type = hwmon_power, 12371323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12381323061aSAndrew Lunn }; 12391323061aSAndrew Lunn 12401323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12411323061aSAndrew Lunn &sfp_hwmon_chip, 12421323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12431323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12441323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12451323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12461323061aSAndrew Lunn NULL, 12471323061aSAndrew Lunn }; 12481323061aSAndrew Lunn 12491323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12501323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12511323061aSAndrew Lunn .info = sfp_hwmon_info, 12521323061aSAndrew Lunn }; 12531323061aSAndrew Lunn 1254139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12551323061aSAndrew Lunn { 1256139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12571323061aSAndrew Lunn int err, i; 12581323061aSAndrew Lunn 1259139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1260139d3a21SRussell King if (err < 0) { 1261139d3a21SRussell King if (sfp->hwmon_tries--) { 1262139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1263139d3a21SRussell King T_PROBE_RETRY_SLOW); 1264139d3a21SRussell King } else { 1265139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1266139d3a21SRussell King } 1267139d3a21SRussell King return; 1268139d3a21SRussell King } 1269139d3a21SRussell King 1270139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1271139d3a21SRussell King if (!sfp->hwmon_name) { 1272139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1273139d3a21SRussell King return; 1274139d3a21SRussell King } 1275139d3a21SRussell King 1276139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1277139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1278139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1279139d3a21SRussell King 1280139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1281139d3a21SRussell King sfp->hwmon_name, sfp, 1282139d3a21SRussell King &sfp_hwmon_chip_info, 1283139d3a21SRussell King NULL); 1284139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1285139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1286139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1287139d3a21SRussell King } 1288139d3a21SRussell King 1289139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1290139d3a21SRussell King { 12911323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 12921323061aSAndrew Lunn return 0; 12931323061aSAndrew Lunn 12941323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 12951323061aSAndrew Lunn return 0; 12961323061aSAndrew Lunn 12971323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 12981323061aSAndrew Lunn /* This driver in general does not support address 12991323061aSAndrew Lunn * change. 13001323061aSAndrew Lunn */ 13011323061aSAndrew Lunn return 0; 13021323061aSAndrew Lunn 1303139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1304139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 13051323061aSAndrew Lunn 1306139d3a21SRussell King return 0; 13071323061aSAndrew Lunn } 13081323061aSAndrew Lunn 13091323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13101323061aSAndrew Lunn { 1311139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 13123e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 13131323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 13143e322474SAndrew Lunn sfp->hwmon_dev = NULL; 13151323061aSAndrew Lunn kfree(sfp->hwmon_name); 13161323061aSAndrew Lunn } 13173e322474SAndrew Lunn } 1318139d3a21SRussell King 1319139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1320139d3a21SRussell King { 1321139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1322139d3a21SRussell King 1323139d3a21SRussell King return 0; 1324139d3a21SRussell King } 1325139d3a21SRussell King 1326139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1327139d3a21SRussell King { 1328139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1329139d3a21SRussell King } 13301323061aSAndrew Lunn #else 13311323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13321323061aSAndrew Lunn { 13331323061aSAndrew Lunn return 0; 13341323061aSAndrew Lunn } 13351323061aSAndrew Lunn 13361323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13371323061aSAndrew Lunn { 13381323061aSAndrew Lunn } 1339139d3a21SRussell King 1340139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1341139d3a21SRussell King { 1342139d3a21SRussell King return 0; 1343139d3a21SRussell King } 1344139d3a21SRussell King 1345139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1346139d3a21SRussell King { 1347139d3a21SRussell King } 13481323061aSAndrew Lunn #endif 13491323061aSAndrew Lunn 135073970055SRussell King /* Helpers */ 135173970055SRussell King static void sfp_module_tx_disable(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, 1); 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_enable(struct sfp *sfp) 136073970055SRussell King { 136173970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 136273970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 136373970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 136473970055SRussell King sfp_set_state(sfp, sfp->state); 136573970055SRussell King } 136673970055SRussell King 136773970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 136873970055SRussell King { 136973970055SRussell King unsigned int state = sfp->state; 137073970055SRussell King 137173970055SRussell King if (state & SFP_F_TX_DISABLE) 137273970055SRussell King return; 137373970055SRussell King 137473970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 137573970055SRussell King 137673970055SRussell King udelay(T_RESET_US); 137773970055SRussell King 137873970055SRussell King sfp_set_state(sfp, state); 137973970055SRussell King } 138073970055SRussell King 138173970055SRussell King /* SFP state machine */ 138273970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 138373970055SRussell King { 138473970055SRussell King if (timeout) 138573970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 138673970055SRussell King timeout); 138773970055SRussell King else 138873970055SRussell King cancel_delayed_work(&sfp->timeout); 138973970055SRussell King } 139073970055SRussell King 139173970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 139273970055SRussell King unsigned int timeout) 139373970055SRussell King { 139473970055SRussell King sfp->sm_state = state; 139573970055SRussell King sfp_sm_set_timer(sfp, timeout); 139673970055SRussell King } 139773970055SRussell King 13980936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1399516b29edSFlorian Fainelli unsigned int timeout) 140073970055SRussell King { 140173970055SRussell King sfp->sm_mod_state = state; 140273970055SRussell King sfp_sm_set_timer(sfp, timeout); 140373970055SRussell King } 140473970055SRussell King 140573970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 140673970055SRussell King { 140773970055SRussell King sfp_remove_phy(sfp->sfp_bus); 140873970055SRussell King phy_device_remove(sfp->mod_phy); 140973970055SRussell King phy_device_free(sfp->mod_phy); 141073970055SRussell King sfp->mod_phy = NULL; 141173970055SRussell King } 141273970055SRussell King 1413256e43cbSRussell King static int sfp_sm_probe_phy(struct sfp *sfp, bool is_c45) 141473970055SRussell King { 141573970055SRussell King struct phy_device *phy; 141673970055SRussell King int err; 141773970055SRussell King 14189a484621SRussell King phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); 141920b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 142020b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 1421256e43cbSRussell King return 0; 142273970055SRussell King } 142320b56ed9SRussell King if (IS_ERR(phy)) { 142420b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 1425256e43cbSRussell King return PTR_ERR(phy); 142673970055SRussell King } 142773970055SRussell King 14289a484621SRussell King err = phy_device_register(phy); 14299a484621SRussell King if (err) { 14309a484621SRussell King phy_device_free(phy); 14319a484621SRussell King dev_err(sfp->dev, "phy_device_register failed: %d\n", err); 1432256e43cbSRussell King return err; 14339a484621SRussell King } 14349a484621SRussell King 143573970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 143673970055SRussell King if (err) { 143773970055SRussell King phy_device_remove(phy); 143873970055SRussell King phy_device_free(phy); 143973970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 1440256e43cbSRussell King return err; 144173970055SRussell King } 144273970055SRussell King 144373970055SRussell King sfp->mod_phy = phy; 1444256e43cbSRussell King 1445256e43cbSRussell King return 0; 144673970055SRussell King } 144773970055SRussell King 144873970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 144973970055SRussell King { 145073970055SRussell King sfp_link_up(sfp->sfp_bus); 145173970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 145273970055SRussell King } 145373970055SRussell King 145473970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 145573970055SRussell King { 145673970055SRussell King sfp_link_down(sfp->sfp_bus); 145773970055SRussell King } 145873970055SRussell King 145973970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 146073970055SRussell King { 146173970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 146273970055SRussell King 1463710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1464710dfbb0SRussell King * are set, we assume that no LOS signal is available. 146573970055SRussell King */ 1466acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 146773970055SRussell King los ^= SFP_F_LOS; 1468710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1469710dfbb0SRussell King los = 0; 147073970055SRussell King 147173970055SRussell King if (los) 147273970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 147373970055SRussell King else 147473970055SRussell King sfp_sm_link_up(sfp); 147573970055SRussell King } 147673970055SRussell King 1477710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1478710dfbb0SRussell King { 1479710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1480710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1481710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1482710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1483710dfbb0SRussell King } 1484710dfbb0SRussell King 1485710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1486710dfbb0SRussell King { 1487710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1488710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1489710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1490710dfbb0SRussell King event == SFP_E_LOS_LOW); 1491710dfbb0SRussell King } 1492710dfbb0SRussell King 149363ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 149473970055SRussell King { 1495281e4eabSRussell King if (sfp->sm_fault_retries && !--sfp->sm_fault_retries) { 1496516b29edSFlorian Fainelli dev_err(sfp->dev, 1497516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 149873970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 149973970055SRussell King } else { 150073970055SRussell King if (warn) 150173970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 150273970055SRussell King 150363ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 150473970055SRussell King } 150573970055SRussell King } 150673970055SRussell King 15079a484621SRussell King /* Probe a SFP for a PHY device if the module supports copper - the PHY 15089a484621SRussell King * normally sits at I2C bus address 0x56, and may either be a clause 22 15099a484621SRussell King * or clause 45 PHY. 15109a484621SRussell King * 15119a484621SRussell King * Clause 22 copper SFP modules normally operate in Cisco SGMII mode with 15129a484621SRussell King * negotiation enabled, but some may be in 1000base-X - which is for the 15139a484621SRussell King * PHY driver to determine. 15149a484621SRussell King * 15159a484621SRussell King * Clause 45 copper SFP+ modules (10G) appear to switch their interface 15169a484621SRussell King * mode according to the negotiated line speed. 15179a484621SRussell King */ 1518256e43cbSRussell King static int sfp_sm_probe_for_phy(struct sfp *sfp) 1519181f29daSRussell King { 1520256e43cbSRussell King int err = 0; 1521256e43cbSRussell King 15229a484621SRussell King switch (sfp->id.base.extended_cc) { 15239a484621SRussell King case SFF8024_ECC_10GBASE_T_SFI: 15249a484621SRussell King case SFF8024_ECC_10GBASE_T_SR: 15259a484621SRussell King case SFF8024_ECC_5GBASE_T: 15269a484621SRussell King case SFF8024_ECC_2_5GBASE_T: 1527256e43cbSRussell King err = sfp_sm_probe_phy(sfp, true); 15289a484621SRussell King break; 15299a484621SRussell King 15309a484621SRussell King default: 1531fa2de660SRussell King if (sfp->id.base.e1000_base_t) 1532256e43cbSRussell King err = sfp_sm_probe_phy(sfp, false); 15339a484621SRussell King break; 15349a484621SRussell King } 1535256e43cbSRussell King return err; 153673970055SRussell King } 153773970055SRussell King 1538ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 15393bb35261SJon Nettleton { 1540ed32abb1SRussell King u32 power_mW = 1000; 15413bb35261SJon Nettleton 15423bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1543ed32abb1SRussell King power_mW = 1500; 15443bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1545ed32abb1SRussell King power_mW = 2000; 15463bb35261SJon Nettleton 1547ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 15487cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 15497cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 15507cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 15517cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 15527cfa9c92SRussell King /* The module appears not to implement bus address 15537cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 15547cfa9c92SRussell King * indicated mode. 15557cfa9c92SRussell King */ 15563bb35261SJon Nettleton dev_err(sfp->dev, 15573bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1558ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15593bb35261SJon Nettleton return -EINVAL; 15607cfa9c92SRussell King } else { 15613bb35261SJon Nettleton dev_warn(sfp->dev, 15623bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1563ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15643bb35261SJon Nettleton return 0; 15653bb35261SJon Nettleton } 15667cfa9c92SRussell King } 15677cfa9c92SRussell King 15687cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 15697cfa9c92SRussell King * an address change sequence, warn the user that the module may 15707cfa9c92SRussell King * not be functional. 15717cfa9c92SRussell King */ 15727cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 15737cfa9c92SRussell King dev_warn(sfp->dev, 157407f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 15757cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 15767cfa9c92SRussell King return 0; 15777cfa9c92SRussell King } 15783bb35261SJon Nettleton 1579ed32abb1SRussell King sfp->module_power_mW = power_mW; 1580ed32abb1SRussell King 1581ed32abb1SRussell King return 0; 1582ed32abb1SRussell King } 1583ed32abb1SRussell King 1584b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1585ed32abb1SRussell King { 1586ed32abb1SRussell King u8 val; 1587ed32abb1SRussell King int err; 1588ed32abb1SRussell King 15893bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15903bb35261SJon Nettleton if (err != sizeof(val)) { 15913bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1592b036a554SRussell King return -EAGAIN; 15933bb35261SJon Nettleton } 15943bb35261SJon Nettleton 15959a484621SRussell King /* DM7052 reports as a high power module, responds to reads (with 15969a484621SRussell King * all bytes 0xff) at 0x51 but does not accept writes. In any case, 15979a484621SRussell King * if the bit is already set, we're already in high power mode. 15989a484621SRussell King */ 15999a484621SRussell King if (!!(val & BIT(0)) == enable) 16009a484621SRussell King return 0; 16019a484621SRussell King 1602b036a554SRussell King if (enable) 16033bb35261SJon Nettleton val |= BIT(0); 1604b036a554SRussell King else 1605b036a554SRussell King val &= ~BIT(0); 16063bb35261SJon Nettleton 16073bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 16083bb35261SJon Nettleton if (err != sizeof(val)) { 16093bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1610b036a554SRussell King return -EAGAIN; 16113bb35261SJon Nettleton } 16123bb35261SJon Nettleton 1613b036a554SRussell King if (enable) 16143bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1615ed32abb1SRussell King sfp->module_power_mW / 1000, 1616ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 16173bb35261SJon Nettleton 1618b036a554SRussell King return 0; 16193bb35261SJon Nettleton } 16203bb35261SJon Nettleton 1621e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 162273970055SRussell King { 162373970055SRussell King /* SFP module inserted - read I2C data */ 162473970055SRussell King struct sfp_eeprom_id id; 1625981f1f80SRussell King bool cotsworks; 162673970055SRussell King u8 check; 16273bb35261SJon Nettleton int ret; 162873970055SRussell King 16293bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 16303bb35261SJon Nettleton if (ret < 0) { 1631e117be74SRussell King if (report) 16323bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 163373970055SRussell King return -EAGAIN; 163473970055SRussell King } 163573970055SRussell King 16363bb35261SJon Nettleton if (ret != sizeof(id)) { 16373bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 163873970055SRussell King return -EAGAIN; 163973970055SRussell King } 164073970055SRussell King 1641981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1642981f1f80SRussell King * do the final programming with the final module part number, 1643981f1f80SRussell King * serial number and date code. 1644981f1f80SRussell King */ 1645981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1646981f1f80SRussell King 164773970055SRussell King /* Validate the checksum over the base structure */ 164873970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 164973970055SRussell King if (check != id.base.cc_base) { 1650981f1f80SRussell King if (cotsworks) { 1651981f1f80SRussell King dev_warn(sfp->dev, 1652981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1653981f1f80SRussell King check, id.base.cc_base); 1654981f1f80SRussell King } else { 165573970055SRussell King dev_err(sfp->dev, 1656981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1657981f1f80SRussell King check, id.base.cc_base); 165873970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1659981f1f80SRussell King 16, 1, &id, sizeof(id), true); 166073970055SRussell King return -EINVAL; 166173970055SRussell King } 1662981f1f80SRussell King } 166373970055SRussell King 166473970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 166573970055SRussell King if (check != id.ext.cc_ext) { 1666981f1f80SRussell King if (cotsworks) { 1667981f1f80SRussell King dev_warn(sfp->dev, 1668981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1669981f1f80SRussell King check, id.ext.cc_ext); 1670981f1f80SRussell King } else { 167173970055SRussell King dev_err(sfp->dev, 1672981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1673981f1f80SRussell King check, id.ext.cc_ext); 1674981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1675981f1f80SRussell King 16, 1, &id, sizeof(id), true); 167673970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 167773970055SRussell King } 1678981f1f80SRussell King } 167973970055SRussell King 168073970055SRussell King sfp->id = id; 168173970055SRussell King 1682a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1683a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1684a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1685a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1686a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1687a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 168873970055SRussell King 1689259c8618SRussell King /* Check whether we support this module */ 1690f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1691259c8618SRussell King dev_err(sfp->dev, 1692259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 169373970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 169473970055SRussell King return -EINVAL; 169573970055SRussell King } 169673970055SRussell King 1697ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1698ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1699ec7681bdSRussell King dev_warn(sfp->dev, 1700ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1701ec7681bdSRussell King 1702ed32abb1SRussell King /* Parse the module power requirement */ 1703ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1704ed32abb1SRussell King if (ret < 0) 1705ed32abb1SRussell King return ret; 1706ed32abb1SRussell King 170726c97a2dSRussell King if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) && 170826c97a2dSRussell King !memcmp(id.base.vendor_pn, "3FE46541AA ", 16)) 170926c97a2dSRussell King sfp->module_t_start_up = T_START_UP_BAD_GPON; 171026c97a2dSRussell King else 171126c97a2dSRussell King sfp->module_t_start_up = T_START_UP; 171226c97a2dSRussell King 1713b036a554SRussell King return 0; 171473970055SRussell King } 171573970055SRussell King 171673970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 171773970055SRussell King { 171873f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 171973970055SRussell King sfp_module_remove(sfp->sfp_bus); 172073970055SRussell King 17211323061aSAndrew Lunn sfp_hwmon_remove(sfp); 17221323061aSAndrew Lunn 172373970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1724ed32abb1SRussell King sfp->module_power_mW = 0; 172573970055SRussell King 172673970055SRussell King dev_info(sfp->dev, "module removed\n"); 172773970055SRussell King } 172873970055SRussell King 17296b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1730e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 173173970055SRussell King { 1732e85d81a1SRussell King switch (sfp->sm_dev_state) { 1733e85d81a1SRussell King default: 17346b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 17356b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 17366b0da5c9SRussell King break; 17376b0da5c9SRussell King 17386b0da5c9SRussell King case SFP_DEV_DOWN: 17396b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17406b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17416b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1742e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1743e85d81a1SRussell King break; 174473970055SRussell King 1745e85d81a1SRussell King case SFP_DEV_UP: 17466b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 17476b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 17486b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1749e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1750e85d81a1SRussell King break; 1751e85d81a1SRussell King } 1752e85d81a1SRussell King } 175373970055SRussell King 1754d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1755d900954fSRussell King * the on-board EEPROM, and sets up the power level. 175673970055SRussell King */ 1757e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1758e85d81a1SRussell King { 1759b036a554SRussell King int err; 1760b036a554SRussell King 1761b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1762b036a554SRussell King if (event == SFP_E_REMOVE) { 1763d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1764d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1765b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1766b036a554SRussell King return; 1767b036a554SRussell King } 1768b036a554SRussell King 1769b036a554SRussell King /* Handle device detach globally */ 177073f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 177173f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1772b036a554SRussell King if (sfp->module_power_mW > 1000 && 1773b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1774b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 177573f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1776d2e816c0SRussell King return; 1777d2e816c0SRussell King } 1778d2e816c0SRussell King 177973970055SRussell King switch (sfp->sm_mod_state) { 178073970055SRussell King default: 1781e117be74SRussell King if (event == SFP_E_INSERT) { 1782d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1783e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1784e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1785e117be74SRussell King } 178673970055SRussell King break; 178773970055SRussell King 178873970055SRussell King case SFP_MOD_PROBE: 178973f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1790b036a554SRussell King if (event != SFP_E_TIMEOUT) 1791b036a554SRussell King break; 179273970055SRussell King 1793e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1794b036a554SRussell King if (err == -EAGAIN) { 1795e117be74SRussell King if (sfp->sm_mod_tries_init && 1796e117be74SRussell King --sfp->sm_mod_tries_init) { 1797e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1798b036a554SRussell King break; 1799e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1800e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1801e117be74SRussell King dev_warn(sfp->dev, 1802e117be74SRussell King "please wait, module slow to respond\n"); 1803e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1804e117be74SRussell King break; 1805e117be74SRussell King } 1806b036a554SRussell King } 1807b036a554SRussell King if (err < 0) { 1808b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1809b036a554SRussell King break; 1810b036a554SRussell King } 1811b036a554SRussell King 181238ecd706SRussell King err = sfp_hwmon_insert(sfp); 181338ecd706SRussell King if (err) 181438ecd706SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 181538ecd706SRussell King 181673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 181773f5e847SRussell King /* fall through */ 181873f5e847SRussell King case SFP_MOD_WAITDEV: 181973f5e847SRussell King /* Ensure that the device is attached before proceeding */ 182073f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 182173f5e847SRussell King break; 182273f5e847SRussell King 182373f5e847SRussell King /* Report the module insertion to the upstream device */ 182473f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 182573f5e847SRussell King if (err < 0) { 182673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 182773f5e847SRussell King break; 182873f5e847SRussell King } 182973f5e847SRussell King 1830b036a554SRussell King /* If this is a power level 1 module, we are done */ 1831b036a554SRussell King if (sfp->module_power_mW <= 1000) 1832b036a554SRussell King goto insert; 1833b036a554SRussell King 1834b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1835b036a554SRussell King /* fall through */ 1836b036a554SRussell King case SFP_MOD_HPOWER: 1837b036a554SRussell King /* Enable high power mode */ 1838b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 183973f5e847SRussell King if (err < 0) { 184073f5e847SRussell King if (err != -EAGAIN) { 184173f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 18420936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 184373f5e847SRussell King } else { 1844e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 184573f5e847SRussell King } 184673f5e847SRussell King break; 184773f5e847SRussell King } 184873f5e847SRussell King 184973f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 185073970055SRussell King break; 185173970055SRussell King 1852b036a554SRussell King case SFP_MOD_WAITPWR: 1853b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1854b036a554SRussell King if (event != SFP_E_TIMEOUT) 1855b036a554SRussell King break; 1856b036a554SRussell King 1857b036a554SRussell King insert: 18580936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 18593bb35261SJon Nettleton break; 1860b036a554SRussell King 186173970055SRussell King case SFP_MOD_PRESENT: 186273970055SRussell King case SFP_MOD_ERROR: 186373970055SRussell King break; 186473970055SRussell King } 186573970055SRussell King } 186673970055SRussell King 1867e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1868e85d81a1SRussell King { 1869eefa6f1fSRussell King unsigned long timeout; 1870eefa6f1fSRussell King 187173970055SRussell King /* Some events are global */ 187273970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 187373970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 187473970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 187573970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 187673970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 187773970055SRussell King sfp_sm_link_down(sfp); 187874c551caSRussell King if (sfp->sm_state > SFP_S_INIT) 187974c551caSRussell King sfp_module_stop(sfp->sfp_bus); 188073970055SRussell King if (sfp->mod_phy) 188173970055SRussell King sfp_sm_phy_detach(sfp); 18821539e0d3SRussell King sfp_module_tx_disable(sfp); 1883f3c9a666SRussell King sfp_soft_stop_poll(sfp); 188473970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 188573970055SRussell King return; 188673970055SRussell King } 188773970055SRussell King 188873970055SRussell King /* The main state machine */ 188973970055SRussell King switch (sfp->sm_state) { 189073970055SRussell King case SFP_S_DOWN: 1891eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1892eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1893eefa6f1fSRussell King break; 1894eefa6f1fSRussell King 1895f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 1896f3c9a666SRussell King sfp_soft_start_poll(sfp); 1897f3c9a666SRussell King 1898f3c9a666SRussell King sfp_module_tx_enable(sfp); 1899eefa6f1fSRussell King 1900eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1901281e4eabSRussell King sfp->sm_fault_retries = N_FAULT_INIT; 1902eefa6f1fSRussell King 1903eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1904eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1905eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1906eefa6f1fSRussell King */ 1907eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1908eefa6f1fSRussell King break; 1909eefa6f1fSRussell King 1910eefa6f1fSRussell King case SFP_S_WAIT: 1911eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1912eefa6f1fSRussell King break; 1913eefa6f1fSRussell King 1914eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 191526c97a2dSRussell King /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431) 191626c97a2dSRussell King * from the TX_DISABLE deassertion for the module to 191726c97a2dSRussell King * initialise, which is indicated by TX_FAULT 191826c97a2dSRussell King * deasserting. 1919181f29daSRussell King */ 192026c97a2dSRussell King timeout = sfp->module_t_start_up; 1921eefa6f1fSRussell King if (timeout > T_WAIT) 1922eefa6f1fSRussell King timeout -= T_WAIT; 1923eefa6f1fSRussell King else 1924eefa6f1fSRussell King timeout = 1; 1925eefa6f1fSRussell King 1926eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1927eefa6f1fSRussell King } else { 1928eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1929eefa6f1fSRussell King * finished initialising. 1930eefa6f1fSRussell King */ 1931eefa6f1fSRussell King goto init_done; 1932181f29daSRussell King } 193373970055SRussell King break; 193473970055SRussell King 193573970055SRussell King case SFP_S_INIT: 1936d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 193726c97a2dSRussell King /* TX_FAULT is still asserted after t_init or 193826c97a2dSRussell King * or t_start_up, so assume there is a fault. 1939d23751a0SRussell King */ 1940d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1941281e4eabSRussell King sfp->sm_fault_retries == N_FAULT_INIT); 1942d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 1943d23751a0SRussell King init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT 1944d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1945d23751a0SRussell King */ 1946256e43cbSRussell King if (sfp_sm_probe_for_phy(sfp)) { 1947256e43cbSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 1948256e43cbSRussell King break; 1949256e43cbSRussell King } 195074c551caSRussell King if (sfp_module_start(sfp->sfp_bus)) { 195174c551caSRussell King sfp_sm_next(sfp, SFP_S_FAIL, 0); 195274c551caSRussell King break; 195374c551caSRussell King } 1954d23751a0SRussell King sfp_sm_link_check_los(sfp); 1955d23751a0SRussell King 1956d23751a0SRussell King /* Reset the fault retry count */ 1957281e4eabSRussell King sfp->sm_fault_retries = N_FAULT; 1958d23751a0SRussell King } 1959d23751a0SRussell King break; 1960d23751a0SRussell King 1961d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1962d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1963d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 196426c97a2dSRussell King sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up); 1965d23751a0SRussell King } 196673970055SRussell King break; 196773970055SRussell King 196873970055SRussell King case SFP_S_WAIT_LOS: 196973970055SRussell King if (event == SFP_E_TX_FAULT) 197063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1971710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 197273970055SRussell King sfp_sm_link_up(sfp); 197373970055SRussell King break; 197473970055SRussell King 197573970055SRussell King case SFP_S_LINK_UP: 197673970055SRussell King if (event == SFP_E_TX_FAULT) { 197773970055SRussell King sfp_sm_link_down(sfp); 197863ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1979710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 198073970055SRussell King sfp_sm_link_down(sfp); 198173970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 198273970055SRussell King } 198373970055SRussell King break; 198473970055SRussell King 198573970055SRussell King case SFP_S_TX_FAULT: 198673970055SRussell King if (event == SFP_E_TIMEOUT) { 198773970055SRussell King sfp_module_tx_fault_reset(sfp); 198826c97a2dSRussell King sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up); 198973970055SRussell King } 199073970055SRussell King break; 199173970055SRussell King 199273970055SRussell King case SFP_S_REINIT: 199373970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 199463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 199573970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 199673970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 199773970055SRussell King sfp_sm_link_check_los(sfp); 199873970055SRussell King } 199973970055SRussell King break; 200073970055SRussell King 200173970055SRussell King case SFP_S_TX_DISABLE: 200273970055SRussell King break; 200373970055SRussell King } 2004e85d81a1SRussell King } 2005e85d81a1SRussell King 2006e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 2007e85d81a1SRussell King { 2008e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 2009e85d81a1SRussell King 2010e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 2011e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 2012e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 2013e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 2014e85d81a1SRussell King event_to_str(event)); 2015e85d81a1SRussell King 2016e85d81a1SRussell King sfp_sm_device(sfp, event); 20176b0da5c9SRussell King sfp_sm_module(sfp, event); 2018e85d81a1SRussell King sfp_sm_main(sfp, event); 201973970055SRussell King 20204005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 20214005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 20224005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 20234005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 202473970055SRussell King 202573970055SRussell King mutex_unlock(&sfp->sm_mutex); 202673970055SRussell King } 202773970055SRussell King 2028b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 2029b5bfc21aSRussell King { 20306b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 2031b5bfc21aSRussell King } 2032b5bfc21aSRussell King 2033b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 2034b5bfc21aSRussell King { 20356b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 2036b5bfc21aSRussell King } 2037b5bfc21aSRussell King 203873970055SRussell King static void sfp_start(struct sfp *sfp) 203973970055SRussell King { 204073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 204173970055SRussell King } 204273970055SRussell King 204373970055SRussell King static void sfp_stop(struct sfp *sfp) 204473970055SRussell King { 204573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 204673970055SRussell King } 204773970055SRussell King 204873970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 204973970055SRussell King { 205073970055SRussell King /* locking... and check module is present */ 205173970055SRussell King 2052ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 2053ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 205473970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 205573970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 205673970055SRussell King } else { 205773970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 205873970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 205973970055SRussell King } 206073970055SRussell King return 0; 206173970055SRussell King } 206273970055SRussell King 206373970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 206473970055SRussell King u8 *data) 206573970055SRussell King { 206673970055SRussell King unsigned int first, last, len; 206773970055SRussell King int ret; 206873970055SRussell King 206973970055SRussell King if (ee->len == 0) 207073970055SRussell King return -EINVAL; 207173970055SRussell King 207273970055SRussell King first = ee->offset; 207373970055SRussell King last = ee->offset + ee->len; 207473970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 207573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 207673970055SRussell King len -= first; 207773970055SRussell King 20782794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 207973970055SRussell King if (ret < 0) 208073970055SRussell King return ret; 208173970055SRussell King 208273970055SRussell King first += len; 208373970055SRussell King data += len; 208473970055SRussell King } 20852794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 208673970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 208773970055SRussell King len -= first; 208873970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 208973970055SRussell King 20902794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 209173970055SRussell King if (ret < 0) 209273970055SRussell King return ret; 209373970055SRussell King } 209473970055SRussell King return 0; 209573970055SRussell King } 209673970055SRussell King 209773970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2098b5bfc21aSRussell King .attach = sfp_attach, 2099b5bfc21aSRussell King .detach = sfp_detach, 210073970055SRussell King .start = sfp_start, 210173970055SRussell King .stop = sfp_stop, 210273970055SRussell King .module_info = sfp_module_info, 210373970055SRussell King .module_eeprom = sfp_module_eeprom, 210473970055SRussell King }; 210573970055SRussell King 210673970055SRussell King static void sfp_timeout(struct work_struct *work) 210773970055SRussell King { 210873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 210973970055SRussell King 211073970055SRussell King rtnl_lock(); 211173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 211273970055SRussell King rtnl_unlock(); 211373970055SRussell King } 211473970055SRussell King 211573970055SRussell King static void sfp_check_state(struct sfp *sfp) 211673970055SRussell King { 211773970055SRussell King unsigned int state, i, changed; 211873970055SRussell King 21192158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 212073970055SRussell King state = sfp_get_state(sfp); 212173970055SRussell King changed = state ^ sfp->state; 212273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 212373970055SRussell King 212473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 212573970055SRussell King if (changed & BIT(i)) 212673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 212773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 212873970055SRussell King 212973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 213073970055SRussell King sfp->state = state; 213173970055SRussell King 213273970055SRussell King rtnl_lock(); 213373970055SRussell King if (changed & SFP_F_PRESENT) 213473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 213573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 213673970055SRussell King 213773970055SRussell King if (changed & SFP_F_TX_FAULT) 213873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 213973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 214073970055SRussell King 214173970055SRussell King if (changed & SFP_F_LOS) 214273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 214373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 214473970055SRussell King rtnl_unlock(); 21452158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 214673970055SRussell King } 214773970055SRussell King 214873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 214973970055SRussell King { 215073970055SRussell King struct sfp *sfp = data; 215173970055SRussell King 215273970055SRussell King sfp_check_state(sfp); 215373970055SRussell King 215473970055SRussell King return IRQ_HANDLED; 215573970055SRussell King } 215673970055SRussell King 215773970055SRussell King static void sfp_poll(struct work_struct *work) 215873970055SRussell King { 215973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 216073970055SRussell King 216173970055SRussell King sfp_check_state(sfp); 2162f3c9a666SRussell King 2163f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2164f3c9a666SRussell King sfp->need_poll) 216573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 216673970055SRussell King } 216773970055SRussell King 216873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 216973970055SRussell King { 217073970055SRussell King struct sfp *sfp; 217173970055SRussell King 217273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 217373970055SRussell King if (!sfp) 217473970055SRussell King return ERR_PTR(-ENOMEM); 217573970055SRussell King 217673970055SRussell King sfp->dev = dev; 217773970055SRussell King 217873970055SRussell King mutex_init(&sfp->sm_mutex); 21792158e856SRobert Hancock mutex_init(&sfp->st_mutex); 218073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 218173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 218273970055SRussell King 2183139d3a21SRussell King sfp_hwmon_init(sfp); 2184139d3a21SRussell King 218573970055SRussell King return sfp; 218673970055SRussell King } 218773970055SRussell King 218873970055SRussell King static void sfp_cleanup(void *data) 218973970055SRussell King { 219073970055SRussell King struct sfp *sfp = data; 219173970055SRussell King 2192139d3a21SRussell King sfp_hwmon_exit(sfp); 2193139d3a21SRussell King 219473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 219573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 219673970055SRussell King if (sfp->i2c_mii) { 219773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 219873970055SRussell King mdiobus_free(sfp->i2c_mii); 219973970055SRussell King } 220073970055SRussell King if (sfp->i2c) 220173970055SRussell King i2c_put_adapter(sfp->i2c); 220273970055SRussell King kfree(sfp); 220373970055SRussell King } 220473970055SRussell King 220573970055SRussell King static int sfp_probe(struct platform_device *pdev) 220673970055SRussell King { 2207259c8618SRussell King const struct sff_data *sff; 22087ce236faSRuslan Babayev struct i2c_adapter *i2c; 220973970055SRussell King struct sfp *sfp; 2210257c2559SRobert Hancock int err, i; 221173970055SRussell King 221273970055SRussell King sfp = sfp_alloc(&pdev->dev); 221373970055SRussell King if (IS_ERR(sfp)) 221473970055SRussell King return PTR_ERR(sfp); 221573970055SRussell King 221673970055SRussell King platform_set_drvdata(pdev, sfp); 221773970055SRussell King 221873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 221973970055SRussell King if (err < 0) 222073970055SRussell King return err; 222173970055SRussell King 2222259c8618SRussell King sff = sfp->type = &sfp_data; 2223259c8618SRussell King 222473970055SRussell King if (pdev->dev.of_node) { 222573970055SRussell King struct device_node *node = pdev->dev.of_node; 2226259c8618SRussell King const struct of_device_id *id; 222773970055SRussell King struct device_node *np; 222873970055SRussell King 2229259c8618SRussell King id = of_match_node(sfp_of_match, node); 2230259c8618SRussell King if (WARN_ON(!id)) 2231259c8618SRussell King return -EINVAL; 2232259c8618SRussell King 2233259c8618SRussell King sff = sfp->type = id->data; 2234259c8618SRussell King 223573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 223666ede1f9SAntoine Tenart if (!np) { 223766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 223866ede1f9SAntoine Tenart return -ENODEV; 223966ede1f9SAntoine Tenart } 224073970055SRussell King 224173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 224273970055SRussell King of_node_put(np); 22437ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 22447ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 22457ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 22467ce236faSRuslan Babayev struct fwnode_reference_args args; 22477ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 22487ce236faSRuslan Babayev int ret; 22497ce236faSRuslan Babayev 22507ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 22511086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 22527ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 22537ce236faSRuslan Babayev return -ENODEV; 22547ce236faSRuslan Babayev } 22557ce236faSRuslan Babayev 22567ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 22577ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 22587ce236faSRuslan Babayev } else { 22597ce236faSRuslan Babayev return -EINVAL; 22607ce236faSRuslan Babayev } 22617ce236faSRuslan Babayev 226273970055SRussell King if (!i2c) 226373970055SRussell King return -EPROBE_DEFER; 226473970055SRussell King 226573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 226673970055SRussell King if (err < 0) { 226773970055SRussell King i2c_put_adapter(i2c); 226873970055SRussell King return err; 226973970055SRussell King } 227073970055SRussell King 2271259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2272259c8618SRussell King if (sff->gpios & BIT(i)) { 227373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 227473970055SRussell King gpio_of_names[i], gpio_flags[i]); 227573970055SRussell King if (IS_ERR(sfp->gpio[i])) 227673970055SRussell King return PTR_ERR(sfp->gpio[i]); 227773970055SRussell King } 227873970055SRussell King 227973970055SRussell King sfp->get_state = sfp_gpio_get_state; 228073970055SRussell King sfp->set_state = sfp_gpio_set_state; 2281259c8618SRussell King 2282259c8618SRussell King /* Modules that have no detect signal are always present */ 2283259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2284259c8618SRussell King sfp->get_state = sff_gpio_get_state; 228573970055SRussell King 22863bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 22873bb35261SJon Nettleton &sfp->max_power_mW); 22883bb35261SJon Nettleton if (!sfp->max_power_mW) 22893bb35261SJon Nettleton sfp->max_power_mW = 1000; 22903bb35261SJon Nettleton 22913bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 22923bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 22933bb35261SJon Nettleton 229473970055SRussell King /* Get the initial state, and always signal TX disable, 229573970055SRussell King * since the network interface will not be up. 229673970055SRussell King */ 229773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 229873970055SRussell King 229973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 230073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 230173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 230273970055SRussell King sfp_set_state(sfp, sfp->state); 230373970055SRussell King sfp_module_tx_disable(sfp); 230473f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 230573f5e847SRussell King rtnl_lock(); 230673f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 230773f5e847SRussell King rtnl_unlock(); 230873f5e847SRussell King } 230973970055SRussell King 231073970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 231173970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 231273970055SRussell King continue; 231373970055SRussell King 2314257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2315257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 2316f3c9a666SRussell King sfp->need_poll = true; 231773970055SRussell King continue; 231873970055SRussell King } 231973970055SRussell King 2320257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2321257c2559SRobert Hancock NULL, sfp_irq, 232273970055SRussell King IRQF_ONESHOT | 232373970055SRussell King IRQF_TRIGGER_RISING | 232473970055SRussell King IRQF_TRIGGER_FALLING, 232573970055SRussell King dev_name(sfp->dev), sfp); 2326257c2559SRobert Hancock if (err) { 2327257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2328f3c9a666SRussell King sfp->need_poll = true; 232973970055SRussell King } 2330257c2559SRobert Hancock } 233173970055SRussell King 2332f3c9a666SRussell King if (sfp->need_poll) 233373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 233473970055SRussell King 2335a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2336a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2337a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2338a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2339a1f5d1f0SAntoine Tenart */ 2340a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2341a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2342a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2343a1f5d1f0SAntoine Tenart 2344b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2345b5bfc21aSRussell King if (!sfp->sfp_bus) 2346b5bfc21aSRussell King return -ENOMEM; 2347b5bfc21aSRussell King 234873970055SRussell King return 0; 234973970055SRussell King } 235073970055SRussell King 235173970055SRussell King static int sfp_remove(struct platform_device *pdev) 235273970055SRussell King { 235373970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 235473970055SRussell King 235573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 235673970055SRussell King 23570cb96b57SRussell King rtnl_lock(); 23580cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 23590cb96b57SRussell King rtnl_unlock(); 23600cb96b57SRussell King 236173970055SRussell King return 0; 236273970055SRussell King } 236373970055SRussell King 2364257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2365257c2559SRobert Hancock { 2366257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2367257c2559SRobert Hancock int i; 2368257c2559SRobert Hancock 2369257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2370257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2371257c2559SRobert Hancock continue; 2372257c2559SRobert Hancock 2373257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2374257c2559SRobert Hancock } 2375257c2559SRobert Hancock 2376257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2377257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2378257c2559SRobert Hancock } 2379257c2559SRobert Hancock 238073970055SRussell King static struct platform_driver sfp_driver = { 238173970055SRussell King .probe = sfp_probe, 238273970055SRussell King .remove = sfp_remove, 2383257c2559SRobert Hancock .shutdown = sfp_shutdown, 238473970055SRussell King .driver = { 238573970055SRussell King .name = "sfp", 238673970055SRussell King .of_match_table = sfp_of_match, 238773970055SRussell King }, 238873970055SRussell King }; 238973970055SRussell King 239073970055SRussell King static int sfp_init(void) 239173970055SRussell King { 239273970055SRussell King poll_jiffies = msecs_to_jiffies(100); 239373970055SRussell King 239473970055SRussell King return platform_driver_register(&sfp_driver); 239573970055SRussell King } 239673970055SRussell King module_init(sfp_init); 239773970055SRussell King 239873970055SRussell King static void sfp_exit(void) 239973970055SRussell King { 240073970055SRussell King platform_driver_unregister(&sfp_driver); 240173970055SRussell King } 240273970055SRussell King module_exit(sfp_exit); 240373970055SRussell King 240473970055SRussell King MODULE_ALIAS("platform:sfp"); 240573970055SRussell King MODULE_AUTHOR("Russell King"); 240673970055SRussell King MODULE_LICENSE("GPL v2"); 2407