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, 62eefa6f1fSRussell King SFP_S_WAIT, 6373970055SRussell King SFP_S_INIT, 64d23751a0SRussell King SFP_S_INIT_TX_FAULT, 6573970055SRussell King SFP_S_WAIT_LOS, 6673970055SRussell King SFP_S_LINK_UP, 6773970055SRussell King SFP_S_TX_FAULT, 6873970055SRussell King SFP_S_REINIT, 6973970055SRussell King SFP_S_TX_DISABLE, 7073970055SRussell King }; 7173970055SRussell King 724005a7cbSAndrew Lunn static const char * const mod_state_strings[] = { 734005a7cbSAndrew Lunn [SFP_MOD_EMPTY] = "empty", 7473f5e847SRussell King [SFP_MOD_ERROR] = "error", 754005a7cbSAndrew Lunn [SFP_MOD_PROBE] = "probe", 7673f5e847SRussell King [SFP_MOD_WAITDEV] = "waitdev", 774005a7cbSAndrew Lunn [SFP_MOD_HPOWER] = "hpower", 78b036a554SRussell King [SFP_MOD_WAITPWR] = "waitpwr", 794005a7cbSAndrew Lunn [SFP_MOD_PRESENT] = "present", 804005a7cbSAndrew Lunn }; 814005a7cbSAndrew Lunn 824005a7cbSAndrew Lunn static const char *mod_state_to_str(unsigned short mod_state) 834005a7cbSAndrew Lunn { 844005a7cbSAndrew Lunn if (mod_state >= ARRAY_SIZE(mod_state_strings)) 854005a7cbSAndrew Lunn return "Unknown module state"; 864005a7cbSAndrew Lunn return mod_state_strings[mod_state]; 874005a7cbSAndrew Lunn } 884005a7cbSAndrew Lunn 894005a7cbSAndrew Lunn static const char * const dev_state_strings[] = { 906b0da5c9SRussell King [SFP_DEV_DETACHED] = "detached", 914005a7cbSAndrew Lunn [SFP_DEV_DOWN] = "down", 924005a7cbSAndrew Lunn [SFP_DEV_UP] = "up", 934005a7cbSAndrew Lunn }; 944005a7cbSAndrew Lunn 954005a7cbSAndrew Lunn static const char *dev_state_to_str(unsigned short dev_state) 964005a7cbSAndrew Lunn { 974005a7cbSAndrew Lunn if (dev_state >= ARRAY_SIZE(dev_state_strings)) 984005a7cbSAndrew Lunn return "Unknown device state"; 994005a7cbSAndrew Lunn return dev_state_strings[dev_state]; 1004005a7cbSAndrew Lunn } 1014005a7cbSAndrew Lunn 1024005a7cbSAndrew Lunn static const char * const event_strings[] = { 1034005a7cbSAndrew Lunn [SFP_E_INSERT] = "insert", 1044005a7cbSAndrew Lunn [SFP_E_REMOVE] = "remove", 1056b0da5c9SRussell King [SFP_E_DEV_ATTACH] = "dev_attach", 1066b0da5c9SRussell King [SFP_E_DEV_DETACH] = "dev_detach", 1074005a7cbSAndrew Lunn [SFP_E_DEV_DOWN] = "dev_down", 1084005a7cbSAndrew Lunn [SFP_E_DEV_UP] = "dev_up", 1094005a7cbSAndrew Lunn [SFP_E_TX_FAULT] = "tx_fault", 1104005a7cbSAndrew Lunn [SFP_E_TX_CLEAR] = "tx_clear", 1114005a7cbSAndrew Lunn [SFP_E_LOS_HIGH] = "los_high", 1124005a7cbSAndrew Lunn [SFP_E_LOS_LOW] = "los_low", 1134005a7cbSAndrew Lunn [SFP_E_TIMEOUT] = "timeout", 1144005a7cbSAndrew Lunn }; 1154005a7cbSAndrew Lunn 1164005a7cbSAndrew Lunn static const char *event_to_str(unsigned short event) 1174005a7cbSAndrew Lunn { 1184005a7cbSAndrew Lunn if (event >= ARRAY_SIZE(event_strings)) 1194005a7cbSAndrew Lunn return "Unknown event"; 1204005a7cbSAndrew Lunn return event_strings[event]; 1214005a7cbSAndrew Lunn } 1224005a7cbSAndrew Lunn 1234005a7cbSAndrew Lunn static const char * const sm_state_strings[] = { 1244005a7cbSAndrew Lunn [SFP_S_DOWN] = "down", 125eefa6f1fSRussell King [SFP_S_WAIT] = "wait", 1264005a7cbSAndrew Lunn [SFP_S_INIT] = "init", 127d23751a0SRussell King [SFP_S_INIT_TX_FAULT] = "init_tx_fault", 1284005a7cbSAndrew Lunn [SFP_S_WAIT_LOS] = "wait_los", 1294005a7cbSAndrew Lunn [SFP_S_LINK_UP] = "link_up", 1304005a7cbSAndrew Lunn [SFP_S_TX_FAULT] = "tx_fault", 1314005a7cbSAndrew Lunn [SFP_S_REINIT] = "reinit", 1324005a7cbSAndrew Lunn [SFP_S_TX_DISABLE] = "rx_disable", 1334005a7cbSAndrew Lunn }; 1344005a7cbSAndrew Lunn 1354005a7cbSAndrew Lunn static const char *sm_state_to_str(unsigned short sm_state) 1364005a7cbSAndrew Lunn { 1374005a7cbSAndrew Lunn if (sm_state >= ARRAY_SIZE(sm_state_strings)) 1384005a7cbSAndrew Lunn return "Unknown state"; 1394005a7cbSAndrew Lunn return sm_state_strings[sm_state]; 1404005a7cbSAndrew Lunn } 1414005a7cbSAndrew Lunn 14273970055SRussell King static const char *gpio_of_names[] = { 14325ee0793SBaruch Siach "mod-def0", 14473970055SRussell King "los", 14573970055SRussell King "tx-fault", 14673970055SRussell King "tx-disable", 14725ee0793SBaruch Siach "rate-select0", 14873970055SRussell King }; 14973970055SRussell King 15073970055SRussell King static const enum gpiod_flags gpio_flags[] = { 15173970055SRussell King GPIOD_IN, 15273970055SRussell King GPIOD_IN, 15373970055SRussell King GPIOD_IN, 15473970055SRussell King GPIOD_ASIS, 15573970055SRussell King GPIOD_ASIS, 15673970055SRussell King }; 15773970055SRussell King 158eefa6f1fSRussell King #define T_WAIT msecs_to_jiffies(50) 15973970055SRussell King #define T_INIT_JIFFIES msecs_to_jiffies(300) 16073970055SRussell King #define T_RESET_US 10 16173970055SRussell King #define T_FAULT_RECOVER msecs_to_jiffies(1000) 16273970055SRussell King 16373970055SRussell King /* SFP module presence detection is poor: the three MOD DEF signals are 16473970055SRussell King * the same length on the PCB, which means it's possible for MOD DEF 0 to 16573970055SRussell King * connect before the I2C bus on MOD DEF 1/2. 16673970055SRussell King * 167d900954fSRussell King * The SFF-8472 specifies t_serial ("Time from power on until module is 168d900954fSRussell King * ready for data transmission over the two wire serial bus.") as 300ms. 16973970055SRussell King */ 170d900954fSRussell King #define T_SERIAL msecs_to_jiffies(300) 1713bb35261SJon Nettleton #define T_HPOWER_LEVEL msecs_to_jiffies(300) 172e117be74SRussell King #define T_PROBE_RETRY_INIT msecs_to_jiffies(100) 173e117be74SRussell King #define R_PROBE_RETRY_INIT 10 174e117be74SRussell King #define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) 175e117be74SRussell King #define R_PROBE_RETRY_SLOW 12 17673970055SRussell King 177516b29edSFlorian Fainelli /* SFP modules appear to always have their PHY configured for bus address 17873970055SRussell King * 0x56 (which with mdio-i2c, translates to a PHY address of 22). 17973970055SRussell King */ 18073970055SRussell King #define SFP_PHY_ADDR 22 18173970055SRussell King 182259c8618SRussell King struct sff_data { 183259c8618SRussell King unsigned int gpios; 184259c8618SRussell King bool (*module_supported)(const struct sfp_eeprom_id *id); 185259c8618SRussell King }; 186259c8618SRussell King 18773970055SRussell King struct sfp { 18873970055SRussell King struct device *dev; 18973970055SRussell King struct i2c_adapter *i2c; 19073970055SRussell King struct mii_bus *i2c_mii; 19173970055SRussell King struct sfp_bus *sfp_bus; 19273970055SRussell King struct phy_device *mod_phy; 193259c8618SRussell King const struct sff_data *type; 1943bb35261SJon Nettleton u32 max_power_mW; 19573970055SRussell King 19673970055SRussell King unsigned int (*get_state)(struct sfp *); 19773970055SRussell King void (*set_state)(struct sfp *, unsigned int); 19873970055SRussell King int (*read)(struct sfp *, bool, u8, void *, size_t); 1993bb35261SJon Nettleton int (*write)(struct sfp *, bool, u8, void *, size_t); 20073970055SRussell King 20173970055SRussell King struct gpio_desc *gpio[GPIO_MAX]; 202257c2559SRobert Hancock int gpio_irq[GPIO_MAX]; 20373970055SRussell King 2042158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 20573970055SRussell King unsigned int state; 20673970055SRussell King struct delayed_work poll; 20773970055SRussell King struct delayed_work timeout; 2082158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 20973970055SRussell King unsigned char sm_mod_state; 210e117be74SRussell King unsigned char sm_mod_tries_init; 211e117be74SRussell King unsigned char sm_mod_tries; 21273970055SRussell King unsigned char sm_dev_state; 21373970055SRussell King unsigned short sm_state; 21473970055SRussell King unsigned int sm_retries; 21573970055SRussell King 21673970055SRussell King struct sfp_eeprom_id id; 217ed32abb1SRussell King unsigned int module_power_mW; 218ed32abb1SRussell King 2191323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2201323061aSAndrew Lunn struct sfp_diag diag; 221139d3a21SRussell King struct delayed_work hwmon_probe; 222139d3a21SRussell King unsigned int hwmon_tries; 2231323061aSAndrew Lunn struct device *hwmon_dev; 2241323061aSAndrew Lunn char *hwmon_name; 2251323061aSAndrew Lunn #endif 2261323061aSAndrew Lunn 22773970055SRussell King }; 22873970055SRussell King 229259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 230259c8618SRussell King { 231259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 232259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 233259c8618SRussell King } 234259c8618SRussell King 235259c8618SRussell King static const struct sff_data sff_data = { 236259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 237259c8618SRussell King .module_supported = sff_module_supported, 238259c8618SRussell King }; 239259c8618SRussell King 240259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 241259c8618SRussell King { 242259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 243259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 244259c8618SRussell King } 245259c8618SRussell King 246259c8618SRussell King static const struct sff_data sfp_data = { 247259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 248259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 249259c8618SRussell King .module_supported = sfp_module_supported, 250259c8618SRussell King }; 251259c8618SRussell King 252259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 253259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 254259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 255259c8618SRussell King { }, 256259c8618SRussell King }; 257259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 258259c8618SRussell King 25973970055SRussell King static unsigned long poll_jiffies; 26073970055SRussell King 26173970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 26273970055SRussell King { 26373970055SRussell King unsigned int i, state, v; 26473970055SRussell King 26573970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 26673970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 26773970055SRussell King continue; 26873970055SRussell King 26973970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 27073970055SRussell King if (v) 27173970055SRussell King state |= BIT(i); 27273970055SRussell King } 27373970055SRussell King 27473970055SRussell King return state; 27573970055SRussell King } 27673970055SRussell King 277259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 278259c8618SRussell King { 279259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 280259c8618SRussell King } 281259c8618SRussell King 28273970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 28373970055SRussell King { 28473970055SRussell King if (state & SFP_F_PRESENT) { 28573970055SRussell King /* If the module is present, drive the signals */ 28673970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 28773970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 28873970055SRussell King state & SFP_F_TX_DISABLE); 28973970055SRussell King if (state & SFP_F_RATE_SELECT) 29073970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 29173970055SRussell King state & SFP_F_RATE_SELECT); 29273970055SRussell King } else { 29373970055SRussell King /* Otherwise, let them float to the pull-ups */ 29473970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 29573970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 29673970055SRussell King if (state & SFP_F_RATE_SELECT) 29773970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 29873970055SRussell King } 29973970055SRussell King } 30073970055SRussell King 3013bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3023bb35261SJon Nettleton size_t len) 30373970055SRussell King { 30473970055SRussell King struct i2c_msg msgs[2]; 3053bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 30628e74a7cSRussell King size_t this_len; 30773970055SRussell King int ret; 30873970055SRussell King 30973970055SRussell King msgs[0].addr = bus_addr; 31073970055SRussell King msgs[0].flags = 0; 31173970055SRussell King msgs[0].len = 1; 31273970055SRussell King msgs[0].buf = &dev_addr; 31373970055SRussell King msgs[1].addr = bus_addr; 31473970055SRussell King msgs[1].flags = I2C_M_RD; 31573970055SRussell King msgs[1].len = len; 31673970055SRussell King msgs[1].buf = buf; 31773970055SRussell King 31828e74a7cSRussell King while (len) { 31928e74a7cSRussell King this_len = len; 32028e74a7cSRussell King if (this_len > 16) 32128e74a7cSRussell King this_len = 16; 32228e74a7cSRussell King 32328e74a7cSRussell King msgs[1].len = this_len; 32428e74a7cSRussell King 3253bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 32673970055SRussell King if (ret < 0) 32773970055SRussell King return ret; 32873970055SRussell King 32928e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 33028e74a7cSRussell King break; 33128e74a7cSRussell King 33228e74a7cSRussell King msgs[1].buf += this_len; 33328e74a7cSRussell King dev_addr += this_len; 33428e74a7cSRussell King len -= this_len; 33528e74a7cSRussell King } 33628e74a7cSRussell King 33728e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 33873970055SRussell King } 33973970055SRussell King 3403bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 34173970055SRussell King size_t len) 34273970055SRussell King { 3433bb35261SJon Nettleton struct i2c_msg msgs[1]; 3443bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3453bb35261SJon Nettleton int ret; 3463bb35261SJon Nettleton 3473bb35261SJon Nettleton msgs[0].addr = bus_addr; 3483bb35261SJon Nettleton msgs[0].flags = 0; 3493bb35261SJon Nettleton msgs[0].len = 1 + len; 3503bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3513bb35261SJon Nettleton if (!msgs[0].buf) 3523bb35261SJon Nettleton return -ENOMEM; 3533bb35261SJon Nettleton 3543bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3553bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3563bb35261SJon Nettleton 3573bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3583bb35261SJon Nettleton 3593bb35261SJon Nettleton kfree(msgs[0].buf); 3603bb35261SJon Nettleton 3613bb35261SJon Nettleton if (ret < 0) 3623bb35261SJon Nettleton return ret; 3633bb35261SJon Nettleton 3643bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 36573970055SRussell King } 36673970055SRussell King 36773970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 36873970055SRussell King { 36973970055SRussell King struct mii_bus *i2c_mii; 37073970055SRussell King int ret; 37173970055SRussell King 37273970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 37373970055SRussell King return -EINVAL; 37473970055SRussell King 37573970055SRussell King sfp->i2c = i2c; 37673970055SRussell King sfp->read = sfp_i2c_read; 3773bb35261SJon Nettleton sfp->write = sfp_i2c_write; 37873970055SRussell King 37973970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 38073970055SRussell King if (IS_ERR(i2c_mii)) 38173970055SRussell King return PTR_ERR(i2c_mii); 38273970055SRussell King 38373970055SRussell King i2c_mii->name = "SFP I2C Bus"; 38473970055SRussell King i2c_mii->phy_mask = ~0; 38573970055SRussell King 38673970055SRussell King ret = mdiobus_register(i2c_mii); 38773970055SRussell King if (ret < 0) { 38873970055SRussell King mdiobus_free(i2c_mii); 38973970055SRussell King return ret; 39073970055SRussell King } 39173970055SRussell King 39273970055SRussell King sfp->i2c_mii = i2c_mii; 39373970055SRussell King 39473970055SRussell King return 0; 39573970055SRussell King } 39673970055SRussell King 39773970055SRussell King /* Interface */ 39873970055SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 39973970055SRussell King { 40073970055SRussell King return sfp->get_state(sfp); 40173970055SRussell King } 40273970055SRussell King 40373970055SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 40473970055SRussell King { 40573970055SRussell King sfp->set_state(sfp, state); 40673970055SRussell King } 40773970055SRussell King 40873970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 40973970055SRussell King { 41073970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 41173970055SRussell King } 41273970055SRussell King 4133bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4143bb35261SJon Nettleton { 4153bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4163bb35261SJon Nettleton } 4173bb35261SJon Nettleton 41873970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 41973970055SRussell King { 42073970055SRussell King u8 *p, check; 42173970055SRussell King 42273970055SRussell King for (p = buf, check = 0; len; p++, len--) 42373970055SRussell King check += *p; 42473970055SRussell King 42573970055SRussell King return check; 42673970055SRussell King } 42773970055SRussell King 4281323061aSAndrew Lunn /* hwmon */ 4291323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4301323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 4311323061aSAndrew Lunn enum hwmon_sensor_types type, 4321323061aSAndrew Lunn u32 attr, int channel) 4331323061aSAndrew Lunn { 4341323061aSAndrew Lunn const struct sfp *sfp = data; 4351323061aSAndrew Lunn 4361323061aSAndrew Lunn switch (type) { 4371323061aSAndrew Lunn case hwmon_temp: 4381323061aSAndrew Lunn switch (attr) { 4391323061aSAndrew Lunn case hwmon_temp_min_alarm: 4401323061aSAndrew Lunn case hwmon_temp_max_alarm: 4411323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 4421323061aSAndrew Lunn case hwmon_temp_crit_alarm: 4431323061aSAndrew Lunn case hwmon_temp_min: 4441323061aSAndrew Lunn case hwmon_temp_max: 4451323061aSAndrew Lunn case hwmon_temp_lcrit: 4461323061aSAndrew Lunn case hwmon_temp_crit: 447a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 448a33710bdSAndrew Lunn return 0; 449a33710bdSAndrew Lunn /* fall through */ 450a33710bdSAndrew Lunn case hwmon_temp_input: 451c1236979SAndrew Lunn case hwmon_temp_label: 4521323061aSAndrew Lunn return 0444; 4531323061aSAndrew Lunn default: 4541323061aSAndrew Lunn return 0; 4551323061aSAndrew Lunn } 4561323061aSAndrew Lunn case hwmon_in: 4571323061aSAndrew Lunn switch (attr) { 4581323061aSAndrew Lunn case hwmon_in_min_alarm: 4591323061aSAndrew Lunn case hwmon_in_max_alarm: 4601323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 4611323061aSAndrew Lunn case hwmon_in_crit_alarm: 4621323061aSAndrew Lunn case hwmon_in_min: 4631323061aSAndrew Lunn case hwmon_in_max: 4641323061aSAndrew Lunn case hwmon_in_lcrit: 4651323061aSAndrew Lunn case hwmon_in_crit: 466a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 467a33710bdSAndrew Lunn return 0; 468a33710bdSAndrew Lunn /* fall through */ 469a33710bdSAndrew Lunn case hwmon_in_input: 470c1236979SAndrew Lunn case hwmon_in_label: 4711323061aSAndrew Lunn return 0444; 4721323061aSAndrew Lunn default: 4731323061aSAndrew Lunn return 0; 4741323061aSAndrew Lunn } 4751323061aSAndrew Lunn case hwmon_curr: 4761323061aSAndrew Lunn switch (attr) { 4771323061aSAndrew Lunn case hwmon_curr_min_alarm: 4781323061aSAndrew Lunn case hwmon_curr_max_alarm: 4791323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 4801323061aSAndrew Lunn case hwmon_curr_crit_alarm: 4811323061aSAndrew Lunn case hwmon_curr_min: 4821323061aSAndrew Lunn case hwmon_curr_max: 4831323061aSAndrew Lunn case hwmon_curr_lcrit: 4841323061aSAndrew Lunn case hwmon_curr_crit: 485a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 486a33710bdSAndrew Lunn return 0; 487a33710bdSAndrew Lunn /* fall through */ 488a33710bdSAndrew Lunn case hwmon_curr_input: 489c1236979SAndrew Lunn case hwmon_curr_label: 4901323061aSAndrew Lunn return 0444; 4911323061aSAndrew Lunn default: 4921323061aSAndrew Lunn return 0; 4931323061aSAndrew Lunn } 4941323061aSAndrew Lunn case hwmon_power: 4951323061aSAndrew Lunn /* External calibration of receive power requires 4961323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 4971323061aSAndrew Lunn * is not easy, so just skip it. If the module does 4981323061aSAndrew Lunn * not require external calibration, we can however 4991323061aSAndrew Lunn * show receiver power, since FP is then not needed. 5001323061aSAndrew Lunn */ 5011323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 5021323061aSAndrew Lunn channel == 1) 5031323061aSAndrew Lunn return 0; 5041323061aSAndrew Lunn switch (attr) { 5051323061aSAndrew Lunn case hwmon_power_min_alarm: 5061323061aSAndrew Lunn case hwmon_power_max_alarm: 5071323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 5081323061aSAndrew Lunn case hwmon_power_crit_alarm: 5091323061aSAndrew Lunn case hwmon_power_min: 5101323061aSAndrew Lunn case hwmon_power_max: 5111323061aSAndrew Lunn case hwmon_power_lcrit: 5121323061aSAndrew Lunn case hwmon_power_crit: 513a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 514a33710bdSAndrew Lunn return 0; 515a33710bdSAndrew Lunn /* fall through */ 516a33710bdSAndrew Lunn case hwmon_power_input: 517c1236979SAndrew Lunn case hwmon_power_label: 5181323061aSAndrew Lunn return 0444; 5191323061aSAndrew Lunn default: 5201323061aSAndrew Lunn return 0; 5211323061aSAndrew Lunn } 5221323061aSAndrew Lunn default: 5231323061aSAndrew Lunn return 0; 5241323061aSAndrew Lunn } 5251323061aSAndrew Lunn } 5261323061aSAndrew Lunn 5271323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5281323061aSAndrew Lunn { 5291323061aSAndrew Lunn __be16 val; 5301323061aSAndrew Lunn int err; 5311323061aSAndrew Lunn 5321323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 5331323061aSAndrew Lunn if (err < 0) 5341323061aSAndrew Lunn return err; 5351323061aSAndrew Lunn 5361323061aSAndrew Lunn *value = be16_to_cpu(val); 5371323061aSAndrew Lunn 5381323061aSAndrew Lunn return 0; 5391323061aSAndrew Lunn } 5401323061aSAndrew Lunn 5411323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 5421323061aSAndrew Lunn { 5430cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5441323061aSAndrew Lunn } 5451323061aSAndrew Lunn 5461323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 5471323061aSAndrew Lunn long *value) 5481323061aSAndrew Lunn { 5491323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 5501323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 5511323061aSAndrew Lunn } 5521323061aSAndrew Lunn 5531323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 5541323061aSAndrew Lunn { 5551323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 5561323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 5571323061aSAndrew Lunn 5581323061aSAndrew Lunn if (*value >= 0x8000) 5591323061aSAndrew Lunn *value -= 0x10000; 5601323061aSAndrew Lunn 5611323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 5621323061aSAndrew Lunn } 5631323061aSAndrew Lunn 5641323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 5651323061aSAndrew Lunn { 5661323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 5671323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 5681323061aSAndrew Lunn 5691323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5701323061aSAndrew Lunn } 5711323061aSAndrew Lunn 5721323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 5731323061aSAndrew Lunn { 5741323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 5751323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 5761323061aSAndrew Lunn 5771323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 5781323061aSAndrew Lunn } 5791323061aSAndrew Lunn 5801323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 5811323061aSAndrew Lunn { 5821323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 5831323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 5841323061aSAndrew Lunn 5851323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 5861323061aSAndrew Lunn } 5871323061aSAndrew Lunn 5881323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 5891323061aSAndrew Lunn { 5901323061aSAndrew Lunn int err; 5911323061aSAndrew Lunn 5921323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 5931323061aSAndrew Lunn if (err < 0) 5941323061aSAndrew Lunn return err; 5951323061aSAndrew Lunn 5961323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 5971323061aSAndrew Lunn 5981323061aSAndrew Lunn return 0; 5991323061aSAndrew Lunn } 6001323061aSAndrew Lunn 6011323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 6021323061aSAndrew Lunn { 6031323061aSAndrew Lunn int err; 6041323061aSAndrew Lunn 6051323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6061323061aSAndrew Lunn if (err < 0) 6071323061aSAndrew Lunn return err; 6081323061aSAndrew Lunn 6091323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 6101323061aSAndrew Lunn 6111323061aSAndrew Lunn return 0; 6121323061aSAndrew Lunn } 6131323061aSAndrew Lunn 6141323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 6151323061aSAndrew Lunn { 6161323061aSAndrew Lunn int err; 6171323061aSAndrew Lunn 6181323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6191323061aSAndrew Lunn if (err < 0) 6201323061aSAndrew Lunn return err; 6211323061aSAndrew Lunn 6221323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 6231323061aSAndrew Lunn 6241323061aSAndrew Lunn return 0; 6251323061aSAndrew Lunn } 6261323061aSAndrew Lunn 6271323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6281323061aSAndrew Lunn { 6291323061aSAndrew Lunn int err; 6301323061aSAndrew Lunn 6311323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6321323061aSAndrew Lunn if (err < 0) 6331323061aSAndrew Lunn return err; 6341323061aSAndrew Lunn 6351323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 6361323061aSAndrew Lunn 6371323061aSAndrew Lunn return 0; 6381323061aSAndrew Lunn } 6391323061aSAndrew Lunn 6401323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 6411323061aSAndrew Lunn { 6421323061aSAndrew Lunn int err; 6431323061aSAndrew Lunn 6441323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6451323061aSAndrew Lunn if (err < 0) 6461323061aSAndrew Lunn return err; 6471323061aSAndrew Lunn 6481323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 6491323061aSAndrew Lunn 6501323061aSAndrew Lunn return 0; 6511323061aSAndrew Lunn } 6521323061aSAndrew Lunn 6531323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 6541323061aSAndrew Lunn { 6551323061aSAndrew Lunn u8 status; 6561323061aSAndrew Lunn int err; 6571323061aSAndrew Lunn 6581323061aSAndrew Lunn switch (attr) { 6591323061aSAndrew Lunn case hwmon_temp_input: 6601323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 6611323061aSAndrew Lunn 6621323061aSAndrew Lunn case hwmon_temp_lcrit: 6631323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 6641323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6651323061aSAndrew Lunn return 0; 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn case hwmon_temp_min: 6681323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 6691323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6701323061aSAndrew Lunn return 0; 6711323061aSAndrew Lunn case hwmon_temp_max: 6721323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 6731323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6741323061aSAndrew Lunn return 0; 6751323061aSAndrew Lunn 6761323061aSAndrew Lunn case hwmon_temp_crit: 6771323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 6781323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6791323061aSAndrew Lunn return 0; 6801323061aSAndrew Lunn 6811323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 6821323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 6831323061aSAndrew Lunn if (err < 0) 6841323061aSAndrew Lunn return err; 6851323061aSAndrew Lunn 6861323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 6871323061aSAndrew Lunn return 0; 6881323061aSAndrew Lunn 6891323061aSAndrew Lunn case hwmon_temp_min_alarm: 6901323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6911323061aSAndrew Lunn if (err < 0) 6921323061aSAndrew Lunn return err; 6931323061aSAndrew Lunn 6941323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 6951323061aSAndrew Lunn return 0; 6961323061aSAndrew Lunn 6971323061aSAndrew Lunn case hwmon_temp_max_alarm: 6981323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 6991323061aSAndrew Lunn if (err < 0) 7001323061aSAndrew Lunn return err; 7011323061aSAndrew Lunn 7021323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 7031323061aSAndrew Lunn return 0; 7041323061aSAndrew Lunn 7051323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7061323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7071323061aSAndrew Lunn if (err < 0) 7081323061aSAndrew Lunn return err; 7091323061aSAndrew Lunn 7101323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 7111323061aSAndrew Lunn return 0; 7121323061aSAndrew Lunn default: 7131323061aSAndrew Lunn return -EOPNOTSUPP; 7141323061aSAndrew Lunn } 7151323061aSAndrew Lunn 7161323061aSAndrew Lunn return -EOPNOTSUPP; 7171323061aSAndrew Lunn } 7181323061aSAndrew Lunn 7191323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 7201323061aSAndrew Lunn { 7211323061aSAndrew Lunn u8 status; 7221323061aSAndrew Lunn int err; 7231323061aSAndrew Lunn 7241323061aSAndrew Lunn switch (attr) { 7251323061aSAndrew Lunn case hwmon_in_input: 7261323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7271323061aSAndrew Lunn 7281323061aSAndrew Lunn case hwmon_in_lcrit: 7291323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7301323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7311323061aSAndrew Lunn return 0; 7321323061aSAndrew Lunn 7331323061aSAndrew Lunn case hwmon_in_min: 7341323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 7351323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7361323061aSAndrew Lunn return 0; 7371323061aSAndrew Lunn 7381323061aSAndrew Lunn case hwmon_in_max: 7391323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 7401323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7411323061aSAndrew Lunn return 0; 7421323061aSAndrew Lunn 7431323061aSAndrew Lunn case hwmon_in_crit: 7441323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 7451323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 7461323061aSAndrew Lunn return 0; 7471323061aSAndrew Lunn 7481323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 7491323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7501323061aSAndrew Lunn if (err < 0) 7511323061aSAndrew Lunn return err; 7521323061aSAndrew Lunn 7531323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 7541323061aSAndrew Lunn return 0; 7551323061aSAndrew Lunn 7561323061aSAndrew Lunn case hwmon_in_min_alarm: 7571323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7581323061aSAndrew Lunn if (err < 0) 7591323061aSAndrew Lunn return err; 7601323061aSAndrew Lunn 7611323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 7621323061aSAndrew Lunn return 0; 7631323061aSAndrew Lunn 7641323061aSAndrew Lunn case hwmon_in_max_alarm: 7651323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7661323061aSAndrew Lunn if (err < 0) 7671323061aSAndrew Lunn return err; 7681323061aSAndrew Lunn 7691323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 7701323061aSAndrew Lunn return 0; 7711323061aSAndrew Lunn 7721323061aSAndrew Lunn case hwmon_in_crit_alarm: 7731323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7741323061aSAndrew Lunn if (err < 0) 7751323061aSAndrew Lunn return err; 7761323061aSAndrew Lunn 7771323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 7781323061aSAndrew Lunn return 0; 7791323061aSAndrew Lunn default: 7801323061aSAndrew Lunn return -EOPNOTSUPP; 7811323061aSAndrew Lunn } 7821323061aSAndrew Lunn 7831323061aSAndrew Lunn return -EOPNOTSUPP; 7841323061aSAndrew Lunn } 7851323061aSAndrew Lunn 7861323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 7871323061aSAndrew Lunn { 7881323061aSAndrew Lunn u8 status; 7891323061aSAndrew Lunn int err; 7901323061aSAndrew Lunn 7911323061aSAndrew Lunn switch (attr) { 7921323061aSAndrew Lunn case hwmon_curr_input: 7931323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 7941323061aSAndrew Lunn 7951323061aSAndrew Lunn case hwmon_curr_lcrit: 7961323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 7971323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 7981323061aSAndrew Lunn return 0; 7991323061aSAndrew Lunn 8001323061aSAndrew Lunn case hwmon_curr_min: 8011323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 8021323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8031323061aSAndrew Lunn return 0; 8041323061aSAndrew Lunn 8051323061aSAndrew Lunn case hwmon_curr_max: 8061323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 8071323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8081323061aSAndrew Lunn return 0; 8091323061aSAndrew Lunn 8101323061aSAndrew Lunn case hwmon_curr_crit: 8111323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 8121323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8131323061aSAndrew Lunn return 0; 8141323061aSAndrew Lunn 8151323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8161323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8171323061aSAndrew Lunn if (err < 0) 8181323061aSAndrew Lunn return err; 8191323061aSAndrew Lunn 8201323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 8211323061aSAndrew Lunn return 0; 8221323061aSAndrew Lunn 8231323061aSAndrew Lunn case hwmon_curr_min_alarm: 8241323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8251323061aSAndrew Lunn if (err < 0) 8261323061aSAndrew Lunn return err; 8271323061aSAndrew Lunn 8281323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8291323061aSAndrew Lunn return 0; 8301323061aSAndrew Lunn 8311323061aSAndrew Lunn case hwmon_curr_max_alarm: 8321323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8331323061aSAndrew Lunn if (err < 0) 8341323061aSAndrew Lunn return err; 8351323061aSAndrew Lunn 8361323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 8371323061aSAndrew Lunn return 0; 8381323061aSAndrew Lunn 8391323061aSAndrew Lunn case hwmon_curr_crit_alarm: 8401323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8411323061aSAndrew Lunn if (err < 0) 8421323061aSAndrew Lunn return err; 8431323061aSAndrew Lunn 8441323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 8451323061aSAndrew Lunn return 0; 8461323061aSAndrew Lunn default: 8471323061aSAndrew Lunn return -EOPNOTSUPP; 8481323061aSAndrew Lunn } 8491323061aSAndrew Lunn 8501323061aSAndrew Lunn return -EOPNOTSUPP; 8511323061aSAndrew Lunn } 8521323061aSAndrew Lunn 8531323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 8541323061aSAndrew Lunn { 8551323061aSAndrew Lunn u8 status; 8561323061aSAndrew Lunn int err; 8571323061aSAndrew Lunn 8581323061aSAndrew Lunn switch (attr) { 8591323061aSAndrew Lunn case hwmon_power_input: 8601323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 8611323061aSAndrew Lunn 8621323061aSAndrew Lunn case hwmon_power_lcrit: 8631323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 8641323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8651323061aSAndrew Lunn return 0; 8661323061aSAndrew Lunn 8671323061aSAndrew Lunn case hwmon_power_min: 8681323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 8691323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8701323061aSAndrew Lunn return 0; 8711323061aSAndrew Lunn 8721323061aSAndrew Lunn case hwmon_power_max: 8731323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 8741323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8751323061aSAndrew Lunn return 0; 8761323061aSAndrew Lunn 8771323061aSAndrew Lunn case hwmon_power_crit: 8781323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 8791323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 8801323061aSAndrew Lunn return 0; 8811323061aSAndrew Lunn 8821323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 8831323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8841323061aSAndrew Lunn if (err < 0) 8851323061aSAndrew Lunn return err; 8861323061aSAndrew Lunn 8871323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 8881323061aSAndrew Lunn return 0; 8891323061aSAndrew Lunn 8901323061aSAndrew Lunn case hwmon_power_min_alarm: 8911323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8921323061aSAndrew Lunn if (err < 0) 8931323061aSAndrew Lunn return err; 8941323061aSAndrew Lunn 8951323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 8961323061aSAndrew Lunn return 0; 8971323061aSAndrew Lunn 8981323061aSAndrew Lunn case hwmon_power_max_alarm: 8991323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9001323061aSAndrew Lunn if (err < 0) 9011323061aSAndrew Lunn return err; 9021323061aSAndrew Lunn 9031323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 9041323061aSAndrew Lunn return 0; 9051323061aSAndrew Lunn 9061323061aSAndrew Lunn case hwmon_power_crit_alarm: 9071323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9081323061aSAndrew Lunn if (err < 0) 9091323061aSAndrew Lunn return err; 9101323061aSAndrew Lunn 9111323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 9121323061aSAndrew Lunn return 0; 9131323061aSAndrew Lunn default: 9141323061aSAndrew Lunn return -EOPNOTSUPP; 9151323061aSAndrew Lunn } 9161323061aSAndrew Lunn 9171323061aSAndrew Lunn return -EOPNOTSUPP; 9181323061aSAndrew Lunn } 9191323061aSAndrew Lunn 9201323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 9211323061aSAndrew Lunn { 9221323061aSAndrew Lunn u8 status; 9231323061aSAndrew Lunn int err; 9241323061aSAndrew Lunn 9251323061aSAndrew Lunn switch (attr) { 9261323061aSAndrew Lunn case hwmon_power_input: 9271323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9281323061aSAndrew Lunn 9291323061aSAndrew Lunn case hwmon_power_lcrit: 9301323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 9311323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9321323061aSAndrew Lunn return 0; 9331323061aSAndrew Lunn 9341323061aSAndrew Lunn case hwmon_power_min: 9351323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 9361323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9371323061aSAndrew Lunn return 0; 9381323061aSAndrew Lunn 9391323061aSAndrew Lunn case hwmon_power_max: 9401323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 9411323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9421323061aSAndrew Lunn return 0; 9431323061aSAndrew Lunn 9441323061aSAndrew Lunn case hwmon_power_crit: 9451323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 9461323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 9471323061aSAndrew Lunn return 0; 9481323061aSAndrew Lunn 9491323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9501323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9511323061aSAndrew Lunn if (err < 0) 9521323061aSAndrew Lunn return err; 9531323061aSAndrew Lunn 9541323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 9551323061aSAndrew Lunn return 0; 9561323061aSAndrew Lunn 9571323061aSAndrew Lunn case hwmon_power_min_alarm: 9581323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9591323061aSAndrew Lunn if (err < 0) 9601323061aSAndrew Lunn return err; 9611323061aSAndrew Lunn 9621323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 9631323061aSAndrew Lunn return 0; 9641323061aSAndrew Lunn 9651323061aSAndrew Lunn case hwmon_power_max_alarm: 9661323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 9671323061aSAndrew Lunn if (err < 0) 9681323061aSAndrew Lunn return err; 9691323061aSAndrew Lunn 9701323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 9711323061aSAndrew Lunn return 0; 9721323061aSAndrew Lunn 9731323061aSAndrew Lunn case hwmon_power_crit_alarm: 9741323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 9751323061aSAndrew Lunn if (err < 0) 9761323061aSAndrew Lunn return err; 9771323061aSAndrew Lunn 9781323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 9791323061aSAndrew Lunn return 0; 9801323061aSAndrew Lunn default: 9811323061aSAndrew Lunn return -EOPNOTSUPP; 9821323061aSAndrew Lunn } 9831323061aSAndrew Lunn 9841323061aSAndrew Lunn return -EOPNOTSUPP; 9851323061aSAndrew Lunn } 9861323061aSAndrew Lunn 9871323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 9881323061aSAndrew Lunn u32 attr, int channel, long *value) 9891323061aSAndrew Lunn { 9901323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 9911323061aSAndrew Lunn 9921323061aSAndrew Lunn switch (type) { 9931323061aSAndrew Lunn case hwmon_temp: 9941323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 9951323061aSAndrew Lunn case hwmon_in: 9961323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 9971323061aSAndrew Lunn case hwmon_curr: 9981323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 9991323061aSAndrew Lunn case hwmon_power: 10001323061aSAndrew Lunn switch (channel) { 10011323061aSAndrew Lunn case 0: 10021323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 10031323061aSAndrew Lunn case 1: 10041323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 10051323061aSAndrew Lunn default: 10061323061aSAndrew Lunn return -EOPNOTSUPP; 10071323061aSAndrew Lunn } 10081323061aSAndrew Lunn default: 10091323061aSAndrew Lunn return -EOPNOTSUPP; 10101323061aSAndrew Lunn } 10111323061aSAndrew Lunn } 10121323061aSAndrew Lunn 1013c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1014c1236979SAndrew Lunn "TX_power", 1015c1236979SAndrew Lunn "RX_power", 1016c1236979SAndrew Lunn }; 1017c1236979SAndrew Lunn 1018c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1019c1236979SAndrew Lunn enum hwmon_sensor_types type, 1020c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1021c1236979SAndrew Lunn { 1022c1236979SAndrew Lunn switch (type) { 1023c1236979SAndrew Lunn case hwmon_curr: 1024c1236979SAndrew Lunn switch (attr) { 1025c1236979SAndrew Lunn case hwmon_curr_label: 1026c1236979SAndrew Lunn *str = "bias"; 1027c1236979SAndrew Lunn return 0; 1028c1236979SAndrew Lunn default: 1029c1236979SAndrew Lunn return -EOPNOTSUPP; 1030c1236979SAndrew Lunn } 1031c1236979SAndrew Lunn break; 1032c1236979SAndrew Lunn case hwmon_temp: 1033c1236979SAndrew Lunn switch (attr) { 1034c1236979SAndrew Lunn case hwmon_temp_label: 1035c1236979SAndrew Lunn *str = "temperature"; 1036c1236979SAndrew Lunn return 0; 1037c1236979SAndrew Lunn default: 1038c1236979SAndrew Lunn return -EOPNOTSUPP; 1039c1236979SAndrew Lunn } 1040c1236979SAndrew Lunn break; 1041c1236979SAndrew Lunn case hwmon_in: 1042c1236979SAndrew Lunn switch (attr) { 1043c1236979SAndrew Lunn case hwmon_in_label: 1044c1236979SAndrew Lunn *str = "VCC"; 1045c1236979SAndrew Lunn return 0; 1046c1236979SAndrew Lunn default: 1047c1236979SAndrew Lunn return -EOPNOTSUPP; 1048c1236979SAndrew Lunn } 1049c1236979SAndrew Lunn break; 1050c1236979SAndrew Lunn case hwmon_power: 1051c1236979SAndrew Lunn switch (attr) { 1052c1236979SAndrew Lunn case hwmon_power_label: 1053c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1054c1236979SAndrew Lunn return 0; 1055c1236979SAndrew Lunn default: 1056c1236979SAndrew Lunn return -EOPNOTSUPP; 1057c1236979SAndrew Lunn } 1058c1236979SAndrew Lunn break; 1059c1236979SAndrew Lunn default: 1060c1236979SAndrew Lunn return -EOPNOTSUPP; 1061c1236979SAndrew Lunn } 1062c1236979SAndrew Lunn 1063c1236979SAndrew Lunn return -EOPNOTSUPP; 1064c1236979SAndrew Lunn } 1065c1236979SAndrew Lunn 10661323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 10671323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 10681323061aSAndrew Lunn .read = sfp_hwmon_read, 1069c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 10701323061aSAndrew Lunn }; 10711323061aSAndrew Lunn 10721323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 10731323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 10741323061aSAndrew Lunn 0, 10751323061aSAndrew Lunn }; 10761323061aSAndrew Lunn 10771323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 10781323061aSAndrew Lunn .type = hwmon_chip, 10791323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 10801323061aSAndrew Lunn }; 10811323061aSAndrew Lunn 10821323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 10831323061aSAndrew Lunn HWMON_T_INPUT | 10841323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 10851323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 10861323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1087c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1088c1236979SAndrew Lunn HWMON_T_LABEL, 10891323061aSAndrew Lunn 0, 10901323061aSAndrew Lunn }; 10911323061aSAndrew Lunn 10921323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 10931323061aSAndrew Lunn .type = hwmon_temp, 10941323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 10951323061aSAndrew Lunn }; 10961323061aSAndrew Lunn 10971323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 10981323061aSAndrew Lunn HWMON_I_INPUT | 10991323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 11001323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 11011323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1102c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1103c1236979SAndrew Lunn HWMON_I_LABEL, 11041323061aSAndrew Lunn 0, 11051323061aSAndrew Lunn }; 11061323061aSAndrew Lunn 11071323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 11081323061aSAndrew Lunn .type = hwmon_in, 11091323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 11101323061aSAndrew Lunn }; 11111323061aSAndrew Lunn 11121323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 11131323061aSAndrew Lunn HWMON_C_INPUT | 11141323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 11151323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 11161323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1117c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1118c1236979SAndrew Lunn HWMON_C_LABEL, 11191323061aSAndrew Lunn 0, 11201323061aSAndrew Lunn }; 11211323061aSAndrew Lunn 11221323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 11231323061aSAndrew Lunn .type = hwmon_curr, 11241323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 11251323061aSAndrew Lunn }; 11261323061aSAndrew Lunn 11271323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 11281323061aSAndrew Lunn /* Transmit power */ 11291323061aSAndrew Lunn HWMON_P_INPUT | 11301323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11311323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11321323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1133c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1134c1236979SAndrew Lunn HWMON_P_LABEL, 11351323061aSAndrew Lunn /* Receive power */ 11361323061aSAndrew Lunn HWMON_P_INPUT | 11371323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 11381323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 11391323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1140c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1141c1236979SAndrew Lunn HWMON_P_LABEL, 11421323061aSAndrew Lunn 0, 11431323061aSAndrew Lunn }; 11441323061aSAndrew Lunn 11451323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 11461323061aSAndrew Lunn .type = hwmon_power, 11471323061aSAndrew Lunn .config = sfp_hwmon_power_config, 11481323061aSAndrew Lunn }; 11491323061aSAndrew Lunn 11501323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 11511323061aSAndrew Lunn &sfp_hwmon_chip, 11521323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 11531323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 11541323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 11551323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 11561323061aSAndrew Lunn NULL, 11571323061aSAndrew Lunn }; 11581323061aSAndrew Lunn 11591323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 11601323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 11611323061aSAndrew Lunn .info = sfp_hwmon_info, 11621323061aSAndrew Lunn }; 11631323061aSAndrew Lunn 1164139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 11651323061aSAndrew Lunn { 1166139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 11671323061aSAndrew Lunn int err, i; 11681323061aSAndrew Lunn 1169139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1170139d3a21SRussell King if (err < 0) { 1171139d3a21SRussell King if (sfp->hwmon_tries--) { 1172139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1173139d3a21SRussell King T_PROBE_RETRY_SLOW); 1174139d3a21SRussell King } else { 1175139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1176139d3a21SRussell King } 1177139d3a21SRussell King return; 1178139d3a21SRussell King } 1179139d3a21SRussell King 1180139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1181139d3a21SRussell King if (!sfp->hwmon_name) { 1182139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1183139d3a21SRussell King return; 1184139d3a21SRussell King } 1185139d3a21SRussell King 1186139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1187139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1188139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1189139d3a21SRussell King 1190139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1191139d3a21SRussell King sfp->hwmon_name, sfp, 1192139d3a21SRussell King &sfp_hwmon_chip_info, 1193139d3a21SRussell King NULL); 1194139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1195139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1196139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1197139d3a21SRussell King } 1198139d3a21SRussell King 1199139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1200139d3a21SRussell King { 12011323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 12021323061aSAndrew Lunn return 0; 12031323061aSAndrew Lunn 12041323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 12051323061aSAndrew Lunn return 0; 12061323061aSAndrew Lunn 12071323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 12081323061aSAndrew Lunn /* This driver in general does not support address 12091323061aSAndrew Lunn * change. 12101323061aSAndrew Lunn */ 12111323061aSAndrew Lunn return 0; 12121323061aSAndrew Lunn 1213139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1214139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 12151323061aSAndrew Lunn 1216139d3a21SRussell King return 0; 12171323061aSAndrew Lunn } 12181323061aSAndrew Lunn 12191323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 12201323061aSAndrew Lunn { 1221139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 12223e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 12231323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 12243e322474SAndrew Lunn sfp->hwmon_dev = NULL; 12251323061aSAndrew Lunn kfree(sfp->hwmon_name); 12261323061aSAndrew Lunn } 12273e322474SAndrew Lunn } 1228139d3a21SRussell King 1229139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1230139d3a21SRussell King { 1231139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1232139d3a21SRussell King 1233139d3a21SRussell King return 0; 1234139d3a21SRussell King } 1235139d3a21SRussell King 1236139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1237139d3a21SRussell King { 1238139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1239139d3a21SRussell King } 12401323061aSAndrew Lunn #else 12411323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 12421323061aSAndrew Lunn { 12431323061aSAndrew Lunn return 0; 12441323061aSAndrew Lunn } 12451323061aSAndrew Lunn 12461323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 12471323061aSAndrew Lunn { 12481323061aSAndrew Lunn } 1249139d3a21SRussell King 1250139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1251139d3a21SRussell King { 1252139d3a21SRussell King return 0; 1253139d3a21SRussell King } 1254139d3a21SRussell King 1255139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1256139d3a21SRussell King { 1257139d3a21SRussell King } 12581323061aSAndrew Lunn #endif 12591323061aSAndrew Lunn 126073970055SRussell King /* Helpers */ 126173970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 126273970055SRussell King { 126373970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 126473970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 126573970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 126673970055SRussell King sfp_set_state(sfp, sfp->state); 126773970055SRussell King } 126873970055SRussell King 126973970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 127073970055SRussell King { 127173970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 127273970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 127373970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 127473970055SRussell King sfp_set_state(sfp, sfp->state); 127573970055SRussell King } 127673970055SRussell King 127773970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 127873970055SRussell King { 127973970055SRussell King unsigned int state = sfp->state; 128073970055SRussell King 128173970055SRussell King if (state & SFP_F_TX_DISABLE) 128273970055SRussell King return; 128373970055SRussell King 128473970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 128573970055SRussell King 128673970055SRussell King udelay(T_RESET_US); 128773970055SRussell King 128873970055SRussell King sfp_set_state(sfp, state); 128973970055SRussell King } 129073970055SRussell King 129173970055SRussell King /* SFP state machine */ 129273970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 129373970055SRussell King { 129473970055SRussell King if (timeout) 129573970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 129673970055SRussell King timeout); 129773970055SRussell King else 129873970055SRussell King cancel_delayed_work(&sfp->timeout); 129973970055SRussell King } 130073970055SRussell King 130173970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 130273970055SRussell King unsigned int timeout) 130373970055SRussell King { 130473970055SRussell King sfp->sm_state = state; 130573970055SRussell King sfp_sm_set_timer(sfp, timeout); 130673970055SRussell King } 130773970055SRussell King 13080936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1309516b29edSFlorian Fainelli unsigned int timeout) 131073970055SRussell King { 131173970055SRussell King sfp->sm_mod_state = state; 131273970055SRussell King sfp_sm_set_timer(sfp, timeout); 131373970055SRussell King } 131473970055SRussell King 131573970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 131673970055SRussell King { 131773970055SRussell King phy_stop(sfp->mod_phy); 131873970055SRussell King sfp_remove_phy(sfp->sfp_bus); 131973970055SRussell King phy_device_remove(sfp->mod_phy); 132073970055SRussell King phy_device_free(sfp->mod_phy); 132173970055SRussell King sfp->mod_phy = NULL; 132273970055SRussell King } 132373970055SRussell King 132473970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 132573970055SRussell King { 132673970055SRussell King struct phy_device *phy; 132773970055SRussell King int err; 132873970055SRussell King 132973970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 133020b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 133120b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 133273970055SRussell King return; 133373970055SRussell King } 133420b56ed9SRussell King if (IS_ERR(phy)) { 133520b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 133673970055SRussell King return; 133773970055SRussell King } 133873970055SRussell King 133973970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 134073970055SRussell King if (err) { 134173970055SRussell King phy_device_remove(phy); 134273970055SRussell King phy_device_free(phy); 134373970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 134473970055SRussell King return; 134573970055SRussell King } 134673970055SRussell King 134773970055SRussell King sfp->mod_phy = phy; 134873970055SRussell King phy_start(phy); 134973970055SRussell King } 135073970055SRussell King 135173970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 135273970055SRussell King { 135373970055SRussell King sfp_link_up(sfp->sfp_bus); 135473970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 135573970055SRussell King } 135673970055SRussell King 135773970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 135873970055SRussell King { 135973970055SRussell King sfp_link_down(sfp->sfp_bus); 136073970055SRussell King } 136173970055SRussell King 136273970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 136373970055SRussell King { 136473970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 136573970055SRussell King 1366710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1367710dfbb0SRussell King * are set, we assume that no LOS signal is available. 136873970055SRussell King */ 1369acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 137073970055SRussell King los ^= SFP_F_LOS; 1371710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1372710dfbb0SRussell King los = 0; 137373970055SRussell King 137473970055SRussell King if (los) 137573970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 137673970055SRussell King else 137773970055SRussell King sfp_sm_link_up(sfp); 137873970055SRussell King } 137973970055SRussell King 1380710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1381710dfbb0SRussell King { 1382710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1383710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1384710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1385710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1386710dfbb0SRussell King } 1387710dfbb0SRussell King 1388710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1389710dfbb0SRussell King { 1390710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1391710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1392710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1393710dfbb0SRussell King event == SFP_E_LOS_LOW); 1394710dfbb0SRussell King } 1395710dfbb0SRussell King 139663ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 139773970055SRussell King { 139873970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1399516b29edSFlorian Fainelli dev_err(sfp->dev, 1400516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 140173970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 140273970055SRussell King } else { 140373970055SRussell King if (warn) 140473970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 140573970055SRussell King 140663ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 140773970055SRussell King } 140873970055SRussell King } 140973970055SRussell King 141073970055SRussell King static void sfp_sm_mod_init(struct sfp *sfp) 141173970055SRussell King { 141273970055SRussell King sfp_module_tx_enable(sfp); 1413181f29daSRussell King } 141473970055SRussell King 1415181f29daSRussell King static void sfp_sm_probe_for_phy(struct sfp *sfp) 1416181f29daSRussell King { 141773970055SRussell King /* Setting the serdes link mode is guesswork: there's no 141873970055SRussell King * field in the EEPROM which indicates what mode should 141973970055SRussell King * be used. 142073970055SRussell King * 142173970055SRussell King * If it's a gigabit-only fiber module, it probably does 142273970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 142373970055SRussell King * Otherwise, switch to SGMII mode (which is required to 142473970055SRussell King * support non-gigabit speeds) and probe for a PHY. 142573970055SRussell King */ 142673970055SRussell King if (sfp->id.base.e1000_base_t || 142773970055SRussell King sfp->id.base.e100_base_lx || 142873970055SRussell King sfp->id.base.e100_base_fx) 142973970055SRussell King sfp_sm_probe_phy(sfp); 143073970055SRussell King } 143173970055SRussell King 1432ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 14333bb35261SJon Nettleton { 1434ed32abb1SRussell King u32 power_mW = 1000; 14353bb35261SJon Nettleton 14363bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1437ed32abb1SRussell King power_mW = 1500; 14383bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1439ed32abb1SRussell King power_mW = 2000; 14403bb35261SJon Nettleton 1441ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 14427cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 14437cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 14447cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 14457cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 14467cfa9c92SRussell King /* The module appears not to implement bus address 14477cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 14487cfa9c92SRussell King * indicated mode. 14497cfa9c92SRussell King */ 14503bb35261SJon Nettleton dev_err(sfp->dev, 14513bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1452ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 14533bb35261SJon Nettleton return -EINVAL; 14547cfa9c92SRussell King } else { 14553bb35261SJon Nettleton dev_warn(sfp->dev, 14563bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1457ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 14583bb35261SJon Nettleton return 0; 14593bb35261SJon Nettleton } 14607cfa9c92SRussell King } 14617cfa9c92SRussell King 14627cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 14637cfa9c92SRussell King * an address change sequence, warn the user that the module may 14647cfa9c92SRussell King * not be functional. 14657cfa9c92SRussell King */ 14667cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 14677cfa9c92SRussell King dev_warn(sfp->dev, 146807f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 14697cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 14707cfa9c92SRussell King return 0; 14717cfa9c92SRussell King } 14723bb35261SJon Nettleton 1473ed32abb1SRussell King sfp->module_power_mW = power_mW; 1474ed32abb1SRussell King 1475ed32abb1SRussell King return 0; 1476ed32abb1SRussell King } 1477ed32abb1SRussell King 1478b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1479ed32abb1SRussell King { 1480ed32abb1SRussell King u8 val; 1481ed32abb1SRussell King int err; 1482ed32abb1SRussell King 14833bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14843bb35261SJon Nettleton if (err != sizeof(val)) { 14853bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1486b036a554SRussell King return -EAGAIN; 14873bb35261SJon Nettleton } 14883bb35261SJon Nettleton 1489b036a554SRussell King if (enable) 14903bb35261SJon Nettleton val |= BIT(0); 1491b036a554SRussell King else 1492b036a554SRussell King val &= ~BIT(0); 14933bb35261SJon Nettleton 14943bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 14953bb35261SJon Nettleton if (err != sizeof(val)) { 14963bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1497b036a554SRussell King return -EAGAIN; 14983bb35261SJon Nettleton } 14993bb35261SJon Nettleton 1500b036a554SRussell King if (enable) 15013bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1502ed32abb1SRussell King sfp->module_power_mW / 1000, 1503ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 15043bb35261SJon Nettleton 1505b036a554SRussell King return 0; 15063bb35261SJon Nettleton } 15073bb35261SJon Nettleton 1508e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 150973970055SRussell King { 151073970055SRussell King /* SFP module inserted - read I2C data */ 151173970055SRussell King struct sfp_eeprom_id id; 1512981f1f80SRussell King bool cotsworks; 151373970055SRussell King u8 check; 15143bb35261SJon Nettleton int ret; 151573970055SRussell King 15163bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 15173bb35261SJon Nettleton if (ret < 0) { 1518e117be74SRussell King if (report) 15193bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 152073970055SRussell King return -EAGAIN; 152173970055SRussell King } 152273970055SRussell King 15233bb35261SJon Nettleton if (ret != sizeof(id)) { 15243bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 152573970055SRussell King return -EAGAIN; 152673970055SRussell King } 152773970055SRussell King 1528981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1529981f1f80SRussell King * do the final programming with the final module part number, 1530981f1f80SRussell King * serial number and date code. 1531981f1f80SRussell King */ 1532981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1533981f1f80SRussell King 153473970055SRussell King /* Validate the checksum over the base structure */ 153573970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 153673970055SRussell King if (check != id.base.cc_base) { 1537981f1f80SRussell King if (cotsworks) { 1538981f1f80SRussell King dev_warn(sfp->dev, 1539981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1540981f1f80SRussell King check, id.base.cc_base); 1541981f1f80SRussell King } else { 154273970055SRussell King dev_err(sfp->dev, 1543981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1544981f1f80SRussell King check, id.base.cc_base); 154573970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1546981f1f80SRussell King 16, 1, &id, sizeof(id), true); 154773970055SRussell King return -EINVAL; 154873970055SRussell King } 1549981f1f80SRussell King } 155073970055SRussell King 155173970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 155273970055SRussell King if (check != id.ext.cc_ext) { 1553981f1f80SRussell King if (cotsworks) { 1554981f1f80SRussell King dev_warn(sfp->dev, 1555981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1556981f1f80SRussell King check, id.ext.cc_ext); 1557981f1f80SRussell King } else { 155873970055SRussell King dev_err(sfp->dev, 1559981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1560981f1f80SRussell King check, id.ext.cc_ext); 1561981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1562981f1f80SRussell King 16, 1, &id, sizeof(id), true); 156373970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 156473970055SRussell King } 1565981f1f80SRussell King } 156673970055SRussell King 156773970055SRussell King sfp->id = id; 156873970055SRussell King 1569a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1570a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1571a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1572a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1573a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1574a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 157573970055SRussell King 1576259c8618SRussell King /* Check whether we support this module */ 1577259c8618SRussell King if (!sfp->type->module_supported(&sfp->id)) { 1578259c8618SRussell King dev_err(sfp->dev, 1579259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 158073970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 158173970055SRussell King return -EINVAL; 158273970055SRussell King } 158373970055SRussell King 1584ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1585ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1586ec7681bdSRussell King dev_warn(sfp->dev, 1587ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1588ec7681bdSRussell King 1589ed32abb1SRussell King /* Parse the module power requirement */ 1590ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1591ed32abb1SRussell King if (ret < 0) 1592ed32abb1SRussell King return ret; 1593ed32abb1SRussell King 1594b036a554SRussell King return 0; 159573970055SRussell King } 159673970055SRussell King 159773970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 159873970055SRussell King { 159973f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 160073970055SRussell King sfp_module_remove(sfp->sfp_bus); 160173970055SRussell King 16021323061aSAndrew Lunn sfp_hwmon_remove(sfp); 16031323061aSAndrew Lunn 160473970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1605ed32abb1SRussell King sfp->module_power_mW = 0; 160673970055SRussell King 160773970055SRussell King dev_info(sfp->dev, "module removed\n"); 160873970055SRussell King } 160973970055SRussell King 16106b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1611e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 161273970055SRussell King { 1613e85d81a1SRussell King switch (sfp->sm_dev_state) { 1614e85d81a1SRussell King default: 16156b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 16166b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 16176b0da5c9SRussell King break; 16186b0da5c9SRussell King 16196b0da5c9SRussell King case SFP_DEV_DOWN: 16206b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 16216b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 16226b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1623e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1624e85d81a1SRussell King break; 162573970055SRussell King 1626e85d81a1SRussell King case SFP_DEV_UP: 16276b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 16286b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 16296b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1630e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1631e85d81a1SRussell King break; 1632e85d81a1SRussell King } 1633e85d81a1SRussell King } 163473970055SRussell King 1635d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1636d900954fSRussell King * the on-board EEPROM, and sets up the power level. 163773970055SRussell King */ 1638e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1639e85d81a1SRussell King { 1640b036a554SRussell King int err; 1641b036a554SRussell King 1642b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1643b036a554SRussell King if (event == SFP_E_REMOVE) { 1644d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1645d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1646b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1647b036a554SRussell King return; 1648b036a554SRussell King } 1649b036a554SRussell King 1650b036a554SRussell King /* Handle device detach globally */ 165173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 165273f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1653b036a554SRussell King if (sfp->module_power_mW > 1000 && 1654b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1655b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 165673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1657d2e816c0SRussell King return; 1658d2e816c0SRussell King } 1659d2e816c0SRussell King 166073970055SRussell King switch (sfp->sm_mod_state) { 166173970055SRussell King default: 1662e117be74SRussell King if (event == SFP_E_INSERT) { 1663d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1664e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1665e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1666e117be74SRussell King } 166773970055SRussell King break; 166873970055SRussell King 166973970055SRussell King case SFP_MOD_PROBE: 167073f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1671b036a554SRussell King if (event != SFP_E_TIMEOUT) 1672b036a554SRussell King break; 167373970055SRussell King 1674e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1675b036a554SRussell King if (err == -EAGAIN) { 1676e117be74SRussell King if (sfp->sm_mod_tries_init && 1677e117be74SRussell King --sfp->sm_mod_tries_init) { 1678e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1679b036a554SRussell King break; 1680e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1681e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1682e117be74SRussell King dev_warn(sfp->dev, 1683e117be74SRussell King "please wait, module slow to respond\n"); 1684e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1685e117be74SRussell King break; 1686e117be74SRussell King } 1687b036a554SRussell King } 1688b036a554SRussell King if (err < 0) { 1689b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1690b036a554SRussell King break; 1691b036a554SRussell King } 1692b036a554SRussell King 169373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 169473f5e847SRussell King /* fall through */ 169573f5e847SRussell King case SFP_MOD_WAITDEV: 169673f5e847SRussell King /* Ensure that the device is attached before proceeding */ 169773f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 169873f5e847SRussell King break; 169973f5e847SRussell King 170073f5e847SRussell King /* Report the module insertion to the upstream device */ 170173f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 170273f5e847SRussell King if (err < 0) { 170373f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 170473f5e847SRussell King break; 170573f5e847SRussell King } 170673f5e847SRussell King 1707b036a554SRussell King /* If this is a power level 1 module, we are done */ 1708b036a554SRussell King if (sfp->module_power_mW <= 1000) 1709b036a554SRussell King goto insert; 1710b036a554SRussell King 1711b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1712b036a554SRussell King /* fall through */ 1713b036a554SRussell King case SFP_MOD_HPOWER: 1714b036a554SRussell King /* Enable high power mode */ 1715b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 171673f5e847SRussell King if (err < 0) { 171773f5e847SRussell King if (err != -EAGAIN) { 171873f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 17190936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 172073f5e847SRussell King } else { 1721e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 172273f5e847SRussell King } 172373f5e847SRussell King break; 172473f5e847SRussell King } 172573f5e847SRussell King 172673f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 172773970055SRussell King break; 172873970055SRussell King 1729b036a554SRussell King case SFP_MOD_WAITPWR: 1730b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1731b036a554SRussell King if (event != SFP_E_TIMEOUT) 1732b036a554SRussell King break; 1733b036a554SRussell King 1734b036a554SRussell King insert: 17350936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 17363bb35261SJon Nettleton break; 1737b036a554SRussell King 173873970055SRussell King case SFP_MOD_PRESENT: 173973970055SRussell King case SFP_MOD_ERROR: 174073970055SRussell King break; 174173970055SRussell King } 1742139d3a21SRussell King 1743139d3a21SRussell King #if IS_ENABLED(CONFIG_HWMON) 1744139d3a21SRussell King if (sfp->sm_mod_state >= SFP_MOD_WAITDEV && 1745139d3a21SRussell King IS_ERR_OR_NULL(sfp->hwmon_dev)) { 1746139d3a21SRussell King err = sfp_hwmon_insert(sfp); 1747139d3a21SRussell King if (err) 1748139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1749139d3a21SRussell King } 1750139d3a21SRussell King #endif 175173970055SRussell King } 175273970055SRussell King 1753e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1754e85d81a1SRussell King { 1755eefa6f1fSRussell King unsigned long timeout; 1756eefa6f1fSRussell King 175773970055SRussell King /* Some events are global */ 175873970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 175973970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 176073970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 176173970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 176273970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 176373970055SRussell King sfp_sm_link_down(sfp); 176473970055SRussell King if (sfp->mod_phy) 176573970055SRussell King sfp_sm_phy_detach(sfp); 17661539e0d3SRussell King sfp_module_tx_disable(sfp); 176773970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 176873970055SRussell King return; 176973970055SRussell King } 177073970055SRussell King 177173970055SRussell King /* The main state machine */ 177273970055SRussell King switch (sfp->sm_state) { 177373970055SRussell King case SFP_S_DOWN: 1774eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1775eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1776eefa6f1fSRussell King break; 1777eefa6f1fSRussell King 177873970055SRussell King sfp_sm_mod_init(sfp); 1779eefa6f1fSRussell King 1780eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1781eefa6f1fSRussell King sfp->sm_retries = 5; 1782eefa6f1fSRussell King 1783eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1784eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1785eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1786eefa6f1fSRussell King */ 1787eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1788eefa6f1fSRussell King break; 1789eefa6f1fSRussell King 1790eefa6f1fSRussell King case SFP_S_WAIT: 1791eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1792eefa6f1fSRussell King break; 1793eefa6f1fSRussell King 1794eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 1795181f29daSRussell King /* Wait t_init before indicating that the link is up, 1796181f29daSRussell King * provided the current state indicates no TX_FAULT. If 1797181f29daSRussell King * TX_FAULT clears before this time, that's fine too. 1798181f29daSRussell King */ 1799eefa6f1fSRussell King timeout = T_INIT_JIFFIES; 1800eefa6f1fSRussell King if (timeout > T_WAIT) 1801eefa6f1fSRussell King timeout -= T_WAIT; 1802eefa6f1fSRussell King else 1803eefa6f1fSRussell King timeout = 1; 1804eefa6f1fSRussell King 1805eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1806eefa6f1fSRussell King } else { 1807eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1808eefa6f1fSRussell King * finished initialising. 1809eefa6f1fSRussell King */ 1810eefa6f1fSRussell King goto init_done; 1811181f29daSRussell King } 181273970055SRussell King break; 181373970055SRussell King 181473970055SRussell King case SFP_S_INIT: 1815d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 1816d23751a0SRussell King /* TX_FAULT is still asserted after t_init, so assume 1817d23751a0SRussell King * there is a fault. 1818d23751a0SRussell King */ 1819d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1820d23751a0SRussell King sfp->sm_retries == 5); 1821d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 1822d23751a0SRussell King init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT 1823d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1824d23751a0SRussell King */ 1825d23751a0SRussell King sfp_sm_probe_for_phy(sfp); 1826d23751a0SRussell King sfp_sm_link_check_los(sfp); 1827d23751a0SRussell King 1828d23751a0SRussell King /* Reset the fault retry count */ 1829d23751a0SRussell King sfp->sm_retries = 5; 1830d23751a0SRussell King } 1831d23751a0SRussell King break; 1832d23751a0SRussell King 1833d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1834d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1835d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 1836d23751a0SRussell King sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); 1837d23751a0SRussell King } 183873970055SRussell King break; 183973970055SRussell King 184073970055SRussell King case SFP_S_WAIT_LOS: 184173970055SRussell King if (event == SFP_E_TX_FAULT) 184263ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1843710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 184473970055SRussell King sfp_sm_link_up(sfp); 184573970055SRussell King break; 184673970055SRussell King 184773970055SRussell King case SFP_S_LINK_UP: 184873970055SRussell King if (event == SFP_E_TX_FAULT) { 184973970055SRussell King sfp_sm_link_down(sfp); 185063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1851710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 185273970055SRussell King sfp_sm_link_down(sfp); 185373970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 185473970055SRussell King } 185573970055SRussell King break; 185673970055SRussell King 185773970055SRussell King case SFP_S_TX_FAULT: 185873970055SRussell King if (event == SFP_E_TIMEOUT) { 185973970055SRussell King sfp_module_tx_fault_reset(sfp); 186073970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 186173970055SRussell King } 186273970055SRussell King break; 186373970055SRussell King 186473970055SRussell King case SFP_S_REINIT: 186573970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 186663ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 186773970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 186873970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 186973970055SRussell King sfp_sm_link_check_los(sfp); 187073970055SRussell King } 187173970055SRussell King break; 187273970055SRussell King 187373970055SRussell King case SFP_S_TX_DISABLE: 187473970055SRussell King break; 187573970055SRussell King } 1876e85d81a1SRussell King } 1877e85d81a1SRussell King 1878e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 1879e85d81a1SRussell King { 1880e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 1881e85d81a1SRussell King 1882e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 1883e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 1884e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 1885e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 1886e85d81a1SRussell King event_to_str(event)); 1887e85d81a1SRussell King 1888e85d81a1SRussell King sfp_sm_device(sfp, event); 18896b0da5c9SRussell King sfp_sm_module(sfp, event); 1890e85d81a1SRussell King sfp_sm_main(sfp, event); 189173970055SRussell King 18924005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 18934005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 18944005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 18954005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 189673970055SRussell King 189773970055SRussell King mutex_unlock(&sfp->sm_mutex); 189873970055SRussell King } 189973970055SRussell King 1900b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1901b5bfc21aSRussell King { 19026b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 1903b5bfc21aSRussell King } 1904b5bfc21aSRussell King 1905b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1906b5bfc21aSRussell King { 19076b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 1908b5bfc21aSRussell King } 1909b5bfc21aSRussell King 191073970055SRussell King static void sfp_start(struct sfp *sfp) 191173970055SRussell King { 191273970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 191373970055SRussell King } 191473970055SRussell King 191573970055SRussell King static void sfp_stop(struct sfp *sfp) 191673970055SRussell King { 191773970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 191873970055SRussell King } 191973970055SRussell King 192073970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 192173970055SRussell King { 192273970055SRussell King /* locking... and check module is present */ 192373970055SRussell King 1924ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1925ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 192673970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 192773970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 192873970055SRussell King } else { 192973970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 193073970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 193173970055SRussell King } 193273970055SRussell King return 0; 193373970055SRussell King } 193473970055SRussell King 193573970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 193673970055SRussell King u8 *data) 193773970055SRussell King { 193873970055SRussell King unsigned int first, last, len; 193973970055SRussell King int ret; 194073970055SRussell King 194173970055SRussell King if (ee->len == 0) 194273970055SRussell King return -EINVAL; 194373970055SRussell King 194473970055SRussell King first = ee->offset; 194573970055SRussell King last = ee->offset + ee->len; 194673970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 194773970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 194873970055SRussell King len -= first; 194973970055SRussell King 19502794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 195173970055SRussell King if (ret < 0) 195273970055SRussell King return ret; 195373970055SRussell King 195473970055SRussell King first += len; 195573970055SRussell King data += len; 195673970055SRussell King } 19572794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 195873970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 195973970055SRussell King len -= first; 196073970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 196173970055SRussell King 19622794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 196373970055SRussell King if (ret < 0) 196473970055SRussell King return ret; 196573970055SRussell King } 196673970055SRussell King return 0; 196773970055SRussell King } 196873970055SRussell King 196973970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 1970b5bfc21aSRussell King .attach = sfp_attach, 1971b5bfc21aSRussell King .detach = sfp_detach, 197273970055SRussell King .start = sfp_start, 197373970055SRussell King .stop = sfp_stop, 197473970055SRussell King .module_info = sfp_module_info, 197573970055SRussell King .module_eeprom = sfp_module_eeprom, 197673970055SRussell King }; 197773970055SRussell King 197873970055SRussell King static void sfp_timeout(struct work_struct *work) 197973970055SRussell King { 198073970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 198173970055SRussell King 198273970055SRussell King rtnl_lock(); 198373970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 198473970055SRussell King rtnl_unlock(); 198573970055SRussell King } 198673970055SRussell King 198773970055SRussell King static void sfp_check_state(struct sfp *sfp) 198873970055SRussell King { 198973970055SRussell King unsigned int state, i, changed; 199073970055SRussell King 19912158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 199273970055SRussell King state = sfp_get_state(sfp); 199373970055SRussell King changed = state ^ sfp->state; 199473970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 199573970055SRussell King 199673970055SRussell King for (i = 0; i < GPIO_MAX; i++) 199773970055SRussell King if (changed & BIT(i)) 199873970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 199973970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 200073970055SRussell King 200173970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 200273970055SRussell King sfp->state = state; 200373970055SRussell King 200473970055SRussell King rtnl_lock(); 200573970055SRussell King if (changed & SFP_F_PRESENT) 200673970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 200773970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 200873970055SRussell King 200973970055SRussell King if (changed & SFP_F_TX_FAULT) 201073970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 201173970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 201273970055SRussell King 201373970055SRussell King if (changed & SFP_F_LOS) 201473970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 201573970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 201673970055SRussell King rtnl_unlock(); 20172158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 201873970055SRussell King } 201973970055SRussell King 202073970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 202173970055SRussell King { 202273970055SRussell King struct sfp *sfp = data; 202373970055SRussell King 202473970055SRussell King sfp_check_state(sfp); 202573970055SRussell King 202673970055SRussell King return IRQ_HANDLED; 202773970055SRussell King } 202873970055SRussell King 202973970055SRussell King static void sfp_poll(struct work_struct *work) 203073970055SRussell King { 203173970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 203273970055SRussell King 203373970055SRussell King sfp_check_state(sfp); 203473970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 203573970055SRussell King } 203673970055SRussell King 203773970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 203873970055SRussell King { 203973970055SRussell King struct sfp *sfp; 204073970055SRussell King 204173970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 204273970055SRussell King if (!sfp) 204373970055SRussell King return ERR_PTR(-ENOMEM); 204473970055SRussell King 204573970055SRussell King sfp->dev = dev; 204673970055SRussell King 204773970055SRussell King mutex_init(&sfp->sm_mutex); 20482158e856SRobert Hancock mutex_init(&sfp->st_mutex); 204973970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 205073970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 205173970055SRussell King 2052139d3a21SRussell King sfp_hwmon_init(sfp); 2053139d3a21SRussell King 205473970055SRussell King return sfp; 205573970055SRussell King } 205673970055SRussell King 205773970055SRussell King static void sfp_cleanup(void *data) 205873970055SRussell King { 205973970055SRussell King struct sfp *sfp = data; 206073970055SRussell King 2061139d3a21SRussell King sfp_hwmon_exit(sfp); 2062139d3a21SRussell King 206373970055SRussell King cancel_delayed_work_sync(&sfp->poll); 206473970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 206573970055SRussell King if (sfp->i2c_mii) { 206673970055SRussell King mdiobus_unregister(sfp->i2c_mii); 206773970055SRussell King mdiobus_free(sfp->i2c_mii); 206873970055SRussell King } 206973970055SRussell King if (sfp->i2c) 207073970055SRussell King i2c_put_adapter(sfp->i2c); 207173970055SRussell King kfree(sfp); 207273970055SRussell King } 207373970055SRussell King 207473970055SRussell King static int sfp_probe(struct platform_device *pdev) 207573970055SRussell King { 2076259c8618SRussell King const struct sff_data *sff; 20777ce236faSRuslan Babayev struct i2c_adapter *i2c; 207873970055SRussell King struct sfp *sfp; 207973970055SRussell King bool poll = false; 2080257c2559SRobert Hancock int err, i; 208173970055SRussell King 208273970055SRussell King sfp = sfp_alloc(&pdev->dev); 208373970055SRussell King if (IS_ERR(sfp)) 208473970055SRussell King return PTR_ERR(sfp); 208573970055SRussell King 208673970055SRussell King platform_set_drvdata(pdev, sfp); 208773970055SRussell King 208873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 208973970055SRussell King if (err < 0) 209073970055SRussell King return err; 209173970055SRussell King 2092259c8618SRussell King sff = sfp->type = &sfp_data; 2093259c8618SRussell King 209473970055SRussell King if (pdev->dev.of_node) { 209573970055SRussell King struct device_node *node = pdev->dev.of_node; 2096259c8618SRussell King const struct of_device_id *id; 209773970055SRussell King struct device_node *np; 209873970055SRussell King 2099259c8618SRussell King id = of_match_node(sfp_of_match, node); 2100259c8618SRussell King if (WARN_ON(!id)) 2101259c8618SRussell King return -EINVAL; 2102259c8618SRussell King 2103259c8618SRussell King sff = sfp->type = id->data; 2104259c8618SRussell King 210573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 210666ede1f9SAntoine Tenart if (!np) { 210766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 210866ede1f9SAntoine Tenart return -ENODEV; 210966ede1f9SAntoine Tenart } 211073970055SRussell King 211173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 211273970055SRussell King of_node_put(np); 21137ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 21147ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 21157ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 21167ce236faSRuslan Babayev struct fwnode_reference_args args; 21177ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 21187ce236faSRuslan Babayev int ret; 21197ce236faSRuslan Babayev 21207ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 21211086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 21227ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 21237ce236faSRuslan Babayev return -ENODEV; 21247ce236faSRuslan Babayev } 21257ce236faSRuslan Babayev 21267ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 21277ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 21287ce236faSRuslan Babayev } else { 21297ce236faSRuslan Babayev return -EINVAL; 21307ce236faSRuslan Babayev } 21317ce236faSRuslan Babayev 213273970055SRussell King if (!i2c) 213373970055SRussell King return -EPROBE_DEFER; 213473970055SRussell King 213573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 213673970055SRussell King if (err < 0) { 213773970055SRussell King i2c_put_adapter(i2c); 213873970055SRussell King return err; 213973970055SRussell King } 214073970055SRussell King 2141259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2142259c8618SRussell King if (sff->gpios & BIT(i)) { 214373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 214473970055SRussell King gpio_of_names[i], gpio_flags[i]); 214573970055SRussell King if (IS_ERR(sfp->gpio[i])) 214673970055SRussell King return PTR_ERR(sfp->gpio[i]); 214773970055SRussell King } 214873970055SRussell King 214973970055SRussell King sfp->get_state = sfp_gpio_get_state; 215073970055SRussell King sfp->set_state = sfp_gpio_set_state; 2151259c8618SRussell King 2152259c8618SRussell King /* Modules that have no detect signal are always present */ 2153259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2154259c8618SRussell King sfp->get_state = sff_gpio_get_state; 215573970055SRussell King 21563bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 21573bb35261SJon Nettleton &sfp->max_power_mW); 21583bb35261SJon Nettleton if (!sfp->max_power_mW) 21593bb35261SJon Nettleton sfp->max_power_mW = 1000; 21603bb35261SJon Nettleton 21613bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 21623bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 21633bb35261SJon Nettleton 216473970055SRussell King /* Get the initial state, and always signal TX disable, 216573970055SRussell King * since the network interface will not be up. 216673970055SRussell King */ 216773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 216873970055SRussell King 216973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 217073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 217173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 217273970055SRussell King sfp_set_state(sfp, sfp->state); 217373970055SRussell King sfp_module_tx_disable(sfp); 217473f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 217573f5e847SRussell King rtnl_lock(); 217673f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 217773f5e847SRussell King rtnl_unlock(); 217873f5e847SRussell King } 217973970055SRussell King 218073970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 218173970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 218273970055SRussell King continue; 218373970055SRussell King 2184257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2185257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 218673970055SRussell King poll = true; 218773970055SRussell King continue; 218873970055SRussell King } 218973970055SRussell King 2190257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2191257c2559SRobert Hancock NULL, sfp_irq, 219273970055SRussell King IRQF_ONESHOT | 219373970055SRussell King IRQF_TRIGGER_RISING | 219473970055SRussell King IRQF_TRIGGER_FALLING, 219573970055SRussell King dev_name(sfp->dev), sfp); 2196257c2559SRobert Hancock if (err) { 2197257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 219873970055SRussell King poll = true; 219973970055SRussell King } 2200257c2559SRobert Hancock } 220173970055SRussell King 220273970055SRussell King if (poll) 220373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 220473970055SRussell King 2205a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2206a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2207a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2208a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2209a1f5d1f0SAntoine Tenart */ 2210a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2211a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2212a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2213a1f5d1f0SAntoine Tenart 2214b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2215b5bfc21aSRussell King if (!sfp->sfp_bus) 2216b5bfc21aSRussell King return -ENOMEM; 2217b5bfc21aSRussell King 221873970055SRussell King return 0; 221973970055SRussell King } 222073970055SRussell King 222173970055SRussell King static int sfp_remove(struct platform_device *pdev) 222273970055SRussell King { 222373970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 222473970055SRussell King 222573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 222673970055SRussell King 222773970055SRussell King return 0; 222873970055SRussell King } 222973970055SRussell King 2230257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2231257c2559SRobert Hancock { 2232257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2233257c2559SRobert Hancock int i; 2234257c2559SRobert Hancock 2235257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2236257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2237257c2559SRobert Hancock continue; 2238257c2559SRobert Hancock 2239257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2240257c2559SRobert Hancock } 2241257c2559SRobert Hancock 2242257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2243257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2244257c2559SRobert Hancock } 2245257c2559SRobert Hancock 224673970055SRussell King static struct platform_driver sfp_driver = { 224773970055SRussell King .probe = sfp_probe, 224873970055SRussell King .remove = sfp_remove, 2249257c2559SRobert Hancock .shutdown = sfp_shutdown, 225073970055SRussell King .driver = { 225173970055SRussell King .name = "sfp", 225273970055SRussell King .of_match_table = sfp_of_match, 225373970055SRussell King }, 225473970055SRussell King }; 225573970055SRussell King 225673970055SRussell King static int sfp_init(void) 225773970055SRussell King { 225873970055SRussell King poll_jiffies = msecs_to_jiffies(100); 225973970055SRussell King 226073970055SRussell King return platform_driver_register(&sfp_driver); 226173970055SRussell King } 226273970055SRussell King module_init(sfp_init); 226373970055SRussell King 226473970055SRussell King static void sfp_exit(void) 226573970055SRussell King { 226673970055SRussell King platform_driver_unregister(&sfp_driver); 226773970055SRussell King } 226873970055SRussell King module_exit(sfp_exit); 226973970055SRussell King 227073970055SRussell King MODULE_ALIAS("platform:sfp"); 227173970055SRussell King MODULE_AUTHOR("Russell King"); 227273970055SRussell King MODULE_LICENSE("GPL v2"); 2273