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 204f3c9a666SRussell King bool need_poll; 205f3c9a666SRussell King 2062158e856SRobert Hancock struct mutex st_mutex; /* Protects state */ 207f3c9a666SRussell King unsigned int state_soft_mask; 20873970055SRussell King unsigned int state; 20973970055SRussell King struct delayed_work poll; 21073970055SRussell King struct delayed_work timeout; 2112158e856SRobert Hancock struct mutex sm_mutex; /* Protects state machine */ 21273970055SRussell King unsigned char sm_mod_state; 213e117be74SRussell King unsigned char sm_mod_tries_init; 214e117be74SRussell King unsigned char sm_mod_tries; 21573970055SRussell King unsigned char sm_dev_state; 21673970055SRussell King unsigned short sm_state; 21773970055SRussell King unsigned int sm_retries; 21873970055SRussell King 21973970055SRussell King struct sfp_eeprom_id id; 220ed32abb1SRussell King unsigned int module_power_mW; 221ed32abb1SRussell King 2221323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 2231323061aSAndrew Lunn struct sfp_diag diag; 224139d3a21SRussell King struct delayed_work hwmon_probe; 225139d3a21SRussell King unsigned int hwmon_tries; 2261323061aSAndrew Lunn struct device *hwmon_dev; 2271323061aSAndrew Lunn char *hwmon_name; 2281323061aSAndrew Lunn #endif 2291323061aSAndrew Lunn 23073970055SRussell King }; 23173970055SRussell King 232259c8618SRussell King static bool sff_module_supported(const struct sfp_eeprom_id *id) 233259c8618SRussell King { 234259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFF && 235259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 236259c8618SRussell King } 237259c8618SRussell King 238259c8618SRussell King static const struct sff_data sff_data = { 239259c8618SRussell King .gpios = SFP_F_LOS | SFP_F_TX_FAULT | SFP_F_TX_DISABLE, 240259c8618SRussell King .module_supported = sff_module_supported, 241259c8618SRussell King }; 242259c8618SRussell King 243259c8618SRussell King static bool sfp_module_supported(const struct sfp_eeprom_id *id) 244259c8618SRussell King { 245259c8618SRussell King return id->base.phys_id == SFP_PHYS_ID_SFP && 246259c8618SRussell King id->base.phys_ext_id == SFP_PHYS_EXT_ID_SFP; 247259c8618SRussell King } 248259c8618SRussell King 249259c8618SRussell King static const struct sff_data sfp_data = { 250259c8618SRussell King .gpios = SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT | 251259c8618SRussell King SFP_F_TX_DISABLE | SFP_F_RATE_SELECT, 252259c8618SRussell King .module_supported = sfp_module_supported, 253259c8618SRussell King }; 254259c8618SRussell King 255259c8618SRussell King static const struct of_device_id sfp_of_match[] = { 256259c8618SRussell King { .compatible = "sff,sff", .data = &sff_data, }, 257259c8618SRussell King { .compatible = "sff,sfp", .data = &sfp_data, }, 258259c8618SRussell King { }, 259259c8618SRussell King }; 260259c8618SRussell King MODULE_DEVICE_TABLE(of, sfp_of_match); 261259c8618SRussell King 26273970055SRussell King static unsigned long poll_jiffies; 26373970055SRussell King 26473970055SRussell King static unsigned int sfp_gpio_get_state(struct sfp *sfp) 26573970055SRussell King { 26673970055SRussell King unsigned int i, state, v; 26773970055SRussell King 26873970055SRussell King for (i = state = 0; i < GPIO_MAX; i++) { 26973970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 27073970055SRussell King continue; 27173970055SRussell King 27273970055SRussell King v = gpiod_get_value_cansleep(sfp->gpio[i]); 27373970055SRussell King if (v) 27473970055SRussell King state |= BIT(i); 27573970055SRussell King } 27673970055SRussell King 27773970055SRussell King return state; 27873970055SRussell King } 27973970055SRussell King 280259c8618SRussell King static unsigned int sff_gpio_get_state(struct sfp *sfp) 281259c8618SRussell King { 282259c8618SRussell King return sfp_gpio_get_state(sfp) | SFP_F_PRESENT; 283259c8618SRussell King } 284259c8618SRussell King 28573970055SRussell King static void sfp_gpio_set_state(struct sfp *sfp, unsigned int state) 28673970055SRussell King { 28773970055SRussell King if (state & SFP_F_PRESENT) { 28873970055SRussell King /* If the module is present, drive the signals */ 28973970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 29073970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_TX_DISABLE], 29173970055SRussell King state & SFP_F_TX_DISABLE); 29273970055SRussell King if (state & SFP_F_RATE_SELECT) 29373970055SRussell King gpiod_direction_output(sfp->gpio[GPIO_RATE_SELECT], 29473970055SRussell King state & SFP_F_RATE_SELECT); 29573970055SRussell King } else { 29673970055SRussell King /* Otherwise, let them float to the pull-ups */ 29773970055SRussell King if (sfp->gpio[GPIO_TX_DISABLE]) 29873970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_TX_DISABLE]); 29973970055SRussell King if (state & SFP_F_RATE_SELECT) 30073970055SRussell King gpiod_direction_input(sfp->gpio[GPIO_RATE_SELECT]); 30173970055SRussell King } 30273970055SRussell King } 30373970055SRussell King 3043bb35261SJon Nettleton static int sfp_i2c_read(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 3053bb35261SJon Nettleton size_t len) 30673970055SRussell King { 30773970055SRussell King struct i2c_msg msgs[2]; 3083bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 30928e74a7cSRussell King size_t this_len; 31073970055SRussell King int ret; 31173970055SRussell King 31273970055SRussell King msgs[0].addr = bus_addr; 31373970055SRussell King msgs[0].flags = 0; 31473970055SRussell King msgs[0].len = 1; 31573970055SRussell King msgs[0].buf = &dev_addr; 31673970055SRussell King msgs[1].addr = bus_addr; 31773970055SRussell King msgs[1].flags = I2C_M_RD; 31873970055SRussell King msgs[1].len = len; 31973970055SRussell King msgs[1].buf = buf; 32073970055SRussell King 32128e74a7cSRussell King while (len) { 32228e74a7cSRussell King this_len = len; 32328e74a7cSRussell King if (this_len > 16) 32428e74a7cSRussell King this_len = 16; 32528e74a7cSRussell King 32628e74a7cSRussell King msgs[1].len = this_len; 32728e74a7cSRussell King 3283bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 32973970055SRussell King if (ret < 0) 33073970055SRussell King return ret; 33173970055SRussell King 33228e74a7cSRussell King if (ret != ARRAY_SIZE(msgs)) 33328e74a7cSRussell King break; 33428e74a7cSRussell King 33528e74a7cSRussell King msgs[1].buf += this_len; 33628e74a7cSRussell King dev_addr += this_len; 33728e74a7cSRussell King len -= this_len; 33828e74a7cSRussell King } 33928e74a7cSRussell King 34028e74a7cSRussell King return msgs[1].buf - (u8 *)buf; 34173970055SRussell King } 34273970055SRussell King 3433bb35261SJon Nettleton static int sfp_i2c_write(struct sfp *sfp, bool a2, u8 dev_addr, void *buf, 34473970055SRussell King size_t len) 34573970055SRussell King { 3463bb35261SJon Nettleton struct i2c_msg msgs[1]; 3473bb35261SJon Nettleton u8 bus_addr = a2 ? 0x51 : 0x50; 3483bb35261SJon Nettleton int ret; 3493bb35261SJon Nettleton 3503bb35261SJon Nettleton msgs[0].addr = bus_addr; 3513bb35261SJon Nettleton msgs[0].flags = 0; 3523bb35261SJon Nettleton msgs[0].len = 1 + len; 3533bb35261SJon Nettleton msgs[0].buf = kmalloc(1 + len, GFP_KERNEL); 3543bb35261SJon Nettleton if (!msgs[0].buf) 3553bb35261SJon Nettleton return -ENOMEM; 3563bb35261SJon Nettleton 3573bb35261SJon Nettleton msgs[0].buf[0] = dev_addr; 3583bb35261SJon Nettleton memcpy(&msgs[0].buf[1], buf, len); 3593bb35261SJon Nettleton 3603bb35261SJon Nettleton ret = i2c_transfer(sfp->i2c, msgs, ARRAY_SIZE(msgs)); 3613bb35261SJon Nettleton 3623bb35261SJon Nettleton kfree(msgs[0].buf); 3633bb35261SJon Nettleton 3643bb35261SJon Nettleton if (ret < 0) 3653bb35261SJon Nettleton return ret; 3663bb35261SJon Nettleton 3673bb35261SJon Nettleton return ret == ARRAY_SIZE(msgs) ? len : 0; 36873970055SRussell King } 36973970055SRussell King 37073970055SRussell King static int sfp_i2c_configure(struct sfp *sfp, struct i2c_adapter *i2c) 37173970055SRussell King { 37273970055SRussell King struct mii_bus *i2c_mii; 37373970055SRussell King int ret; 37473970055SRussell King 37573970055SRussell King if (!i2c_check_functionality(i2c, I2C_FUNC_I2C)) 37673970055SRussell King return -EINVAL; 37773970055SRussell King 37873970055SRussell King sfp->i2c = i2c; 37973970055SRussell King sfp->read = sfp_i2c_read; 3803bb35261SJon Nettleton sfp->write = sfp_i2c_write; 38173970055SRussell King 38273970055SRussell King i2c_mii = mdio_i2c_alloc(sfp->dev, i2c); 38373970055SRussell King if (IS_ERR(i2c_mii)) 38473970055SRussell King return PTR_ERR(i2c_mii); 38573970055SRussell King 38673970055SRussell King i2c_mii->name = "SFP I2C Bus"; 38773970055SRussell King i2c_mii->phy_mask = ~0; 38873970055SRussell King 38973970055SRussell King ret = mdiobus_register(i2c_mii); 39073970055SRussell King if (ret < 0) { 39173970055SRussell King mdiobus_free(i2c_mii); 39273970055SRussell King return ret; 39373970055SRussell King } 39473970055SRussell King 39573970055SRussell King sfp->i2c_mii = i2c_mii; 39673970055SRussell King 39773970055SRussell King return 0; 39873970055SRussell King } 39973970055SRussell King 40073970055SRussell King /* Interface */ 40173970055SRussell King static int sfp_read(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 40273970055SRussell King { 40373970055SRussell King return sfp->read(sfp, a2, addr, buf, len); 40473970055SRussell King } 40573970055SRussell King 4063bb35261SJon Nettleton static int sfp_write(struct sfp *sfp, bool a2, u8 addr, void *buf, size_t len) 4073bb35261SJon Nettleton { 4083bb35261SJon Nettleton return sfp->write(sfp, a2, addr, buf, len); 4093bb35261SJon Nettleton } 4103bb35261SJon Nettleton 411f3c9a666SRussell King static unsigned int sfp_soft_get_state(struct sfp *sfp) 412f3c9a666SRussell King { 413f3c9a666SRussell King unsigned int state = 0; 414f3c9a666SRussell King u8 status; 415f3c9a666SRussell King 416f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 417f3c9a666SRussell King sizeof(status)) { 418f3c9a666SRussell King if (status & SFP_STATUS_RX_LOS) 419f3c9a666SRussell King state |= SFP_F_LOS; 420f3c9a666SRussell King if (status & SFP_STATUS_TX_FAULT) 421f3c9a666SRussell King state |= SFP_F_TX_FAULT; 422f3c9a666SRussell King } 423f3c9a666SRussell King 424f3c9a666SRussell King return state & sfp->state_soft_mask; 425f3c9a666SRussell King } 426f3c9a666SRussell King 427f3c9a666SRussell King static void sfp_soft_set_state(struct sfp *sfp, unsigned int state) 428f3c9a666SRussell King { 429f3c9a666SRussell King u8 status; 430f3c9a666SRussell King 431f3c9a666SRussell King if (sfp_read(sfp, true, SFP_STATUS, &status, sizeof(status)) == 432f3c9a666SRussell King sizeof(status)) { 433f3c9a666SRussell King if (state & SFP_F_TX_DISABLE) 434f3c9a666SRussell King status |= SFP_STATUS_TX_DISABLE_FORCE; 435f3c9a666SRussell King else 436f3c9a666SRussell King status &= ~SFP_STATUS_TX_DISABLE_FORCE; 437f3c9a666SRussell King 438f3c9a666SRussell King sfp_write(sfp, true, SFP_STATUS, &status, sizeof(status)); 439f3c9a666SRussell King } 440f3c9a666SRussell King } 441f3c9a666SRussell King 442f3c9a666SRussell King static void sfp_soft_start_poll(struct sfp *sfp) 443f3c9a666SRussell King { 444f3c9a666SRussell King const struct sfp_eeprom_id *id = &sfp->id; 445f3c9a666SRussell King 446f3c9a666SRussell King sfp->state_soft_mask = 0; 447f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_DISABLE && 448f3c9a666SRussell King !sfp->gpio[GPIO_TX_DISABLE]) 449f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_DISABLE; 450f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_TX_FAULT && 451f3c9a666SRussell King !sfp->gpio[GPIO_TX_FAULT]) 452f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_TX_FAULT; 453f3c9a666SRussell King if (id->ext.enhopts & SFP_ENHOPTS_SOFT_RX_LOS && 454f3c9a666SRussell King !sfp->gpio[GPIO_LOS]) 455f3c9a666SRussell King sfp->state_soft_mask |= SFP_F_LOS; 456f3c9a666SRussell King 457f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) && 458f3c9a666SRussell King !sfp->need_poll) 459f3c9a666SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 460f3c9a666SRussell King } 461f3c9a666SRussell King 462f3c9a666SRussell King static void sfp_soft_stop_poll(struct sfp *sfp) 463f3c9a666SRussell King { 464f3c9a666SRussell King sfp->state_soft_mask = 0; 465f3c9a666SRussell King } 466f3c9a666SRussell King 467f3c9a666SRussell King static unsigned int sfp_get_state(struct sfp *sfp) 468f3c9a666SRussell King { 469f3c9a666SRussell King unsigned int state = sfp->get_state(sfp); 470f3c9a666SRussell King 471f3c9a666SRussell King if (state & SFP_F_PRESENT && 472f3c9a666SRussell King sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT)) 473f3c9a666SRussell King state |= sfp_soft_get_state(sfp); 474f3c9a666SRussell King 475f3c9a666SRussell King return state; 476f3c9a666SRussell King } 477f3c9a666SRussell King 478f3c9a666SRussell King static void sfp_set_state(struct sfp *sfp, unsigned int state) 479f3c9a666SRussell King { 480f3c9a666SRussell King sfp->set_state(sfp, state); 481f3c9a666SRussell King 482f3c9a666SRussell King if (state & SFP_F_PRESENT && 483f3c9a666SRussell King sfp->state_soft_mask & SFP_F_TX_DISABLE) 484f3c9a666SRussell King sfp_soft_set_state(sfp, state); 485f3c9a666SRussell King } 486f3c9a666SRussell King 48773970055SRussell King static unsigned int sfp_check(void *buf, size_t len) 48873970055SRussell King { 48973970055SRussell King u8 *p, check; 49073970055SRussell King 49173970055SRussell King for (p = buf, check = 0; len; p++, len--) 49273970055SRussell King check += *p; 49373970055SRussell King 49473970055SRussell King return check; 49573970055SRussell King } 49673970055SRussell King 4971323061aSAndrew Lunn /* hwmon */ 4981323061aSAndrew Lunn #if IS_ENABLED(CONFIG_HWMON) 4991323061aSAndrew Lunn static umode_t sfp_hwmon_is_visible(const void *data, 5001323061aSAndrew Lunn enum hwmon_sensor_types type, 5011323061aSAndrew Lunn u32 attr, int channel) 5021323061aSAndrew Lunn { 5031323061aSAndrew Lunn const struct sfp *sfp = data; 5041323061aSAndrew Lunn 5051323061aSAndrew Lunn switch (type) { 5061323061aSAndrew Lunn case hwmon_temp: 5071323061aSAndrew Lunn switch (attr) { 5081323061aSAndrew Lunn case hwmon_temp_min_alarm: 5091323061aSAndrew Lunn case hwmon_temp_max_alarm: 5101323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 5111323061aSAndrew Lunn case hwmon_temp_crit_alarm: 5121323061aSAndrew Lunn case hwmon_temp_min: 5131323061aSAndrew Lunn case hwmon_temp_max: 5141323061aSAndrew Lunn case hwmon_temp_lcrit: 5151323061aSAndrew Lunn case hwmon_temp_crit: 516a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 517a33710bdSAndrew Lunn return 0; 518a33710bdSAndrew Lunn /* fall through */ 519a33710bdSAndrew Lunn case hwmon_temp_input: 520c1236979SAndrew Lunn case hwmon_temp_label: 5211323061aSAndrew Lunn return 0444; 5221323061aSAndrew Lunn default: 5231323061aSAndrew Lunn return 0; 5241323061aSAndrew Lunn } 5251323061aSAndrew Lunn case hwmon_in: 5261323061aSAndrew Lunn switch (attr) { 5271323061aSAndrew Lunn case hwmon_in_min_alarm: 5281323061aSAndrew Lunn case hwmon_in_max_alarm: 5291323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 5301323061aSAndrew Lunn case hwmon_in_crit_alarm: 5311323061aSAndrew Lunn case hwmon_in_min: 5321323061aSAndrew Lunn case hwmon_in_max: 5331323061aSAndrew Lunn case hwmon_in_lcrit: 5341323061aSAndrew Lunn case hwmon_in_crit: 535a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 536a33710bdSAndrew Lunn return 0; 537a33710bdSAndrew Lunn /* fall through */ 538a33710bdSAndrew Lunn case hwmon_in_input: 539c1236979SAndrew Lunn case hwmon_in_label: 5401323061aSAndrew Lunn return 0444; 5411323061aSAndrew Lunn default: 5421323061aSAndrew Lunn return 0; 5431323061aSAndrew Lunn } 5441323061aSAndrew Lunn case hwmon_curr: 5451323061aSAndrew Lunn switch (attr) { 5461323061aSAndrew Lunn case hwmon_curr_min_alarm: 5471323061aSAndrew Lunn case hwmon_curr_max_alarm: 5481323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 5491323061aSAndrew Lunn case hwmon_curr_crit_alarm: 5501323061aSAndrew Lunn case hwmon_curr_min: 5511323061aSAndrew Lunn case hwmon_curr_max: 5521323061aSAndrew Lunn case hwmon_curr_lcrit: 5531323061aSAndrew Lunn case hwmon_curr_crit: 554a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 555a33710bdSAndrew Lunn return 0; 556a33710bdSAndrew Lunn /* fall through */ 557a33710bdSAndrew Lunn case hwmon_curr_input: 558c1236979SAndrew Lunn case hwmon_curr_label: 5591323061aSAndrew Lunn return 0444; 5601323061aSAndrew Lunn default: 5611323061aSAndrew Lunn return 0; 5621323061aSAndrew Lunn } 5631323061aSAndrew Lunn case hwmon_power: 5641323061aSAndrew Lunn /* External calibration of receive power requires 5651323061aSAndrew Lunn * floating point arithmetic. Doing that in the kernel 5661323061aSAndrew Lunn * is not easy, so just skip it. If the module does 5671323061aSAndrew Lunn * not require external calibration, we can however 5681323061aSAndrew Lunn * show receiver power, since FP is then not needed. 5691323061aSAndrew Lunn */ 5701323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL && 5711323061aSAndrew Lunn channel == 1) 5721323061aSAndrew Lunn return 0; 5731323061aSAndrew Lunn switch (attr) { 5741323061aSAndrew Lunn case hwmon_power_min_alarm: 5751323061aSAndrew Lunn case hwmon_power_max_alarm: 5761323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 5771323061aSAndrew Lunn case hwmon_power_crit_alarm: 5781323061aSAndrew Lunn case hwmon_power_min: 5791323061aSAndrew Lunn case hwmon_power_max: 5801323061aSAndrew Lunn case hwmon_power_lcrit: 5811323061aSAndrew Lunn case hwmon_power_crit: 582a33710bdSAndrew Lunn if (!(sfp->id.ext.enhopts & SFP_ENHOPTS_ALARMWARN)) 583a33710bdSAndrew Lunn return 0; 584a33710bdSAndrew Lunn /* fall through */ 585a33710bdSAndrew Lunn case hwmon_power_input: 586c1236979SAndrew Lunn case hwmon_power_label: 5871323061aSAndrew Lunn return 0444; 5881323061aSAndrew Lunn default: 5891323061aSAndrew Lunn return 0; 5901323061aSAndrew Lunn } 5911323061aSAndrew Lunn default: 5921323061aSAndrew Lunn return 0; 5931323061aSAndrew Lunn } 5941323061aSAndrew Lunn } 5951323061aSAndrew Lunn 5961323061aSAndrew Lunn static int sfp_hwmon_read_sensor(struct sfp *sfp, int reg, long *value) 5971323061aSAndrew Lunn { 5981323061aSAndrew Lunn __be16 val; 5991323061aSAndrew Lunn int err; 6001323061aSAndrew Lunn 6011323061aSAndrew Lunn err = sfp_read(sfp, true, reg, &val, sizeof(val)); 6021323061aSAndrew Lunn if (err < 0) 6031323061aSAndrew Lunn return err; 6041323061aSAndrew Lunn 6051323061aSAndrew Lunn *value = be16_to_cpu(val); 6061323061aSAndrew Lunn 6071323061aSAndrew Lunn return 0; 6081323061aSAndrew Lunn } 6091323061aSAndrew Lunn 6101323061aSAndrew Lunn static void sfp_hwmon_to_rx_power(long *value) 6111323061aSAndrew Lunn { 6120cea0e11SAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6131323061aSAndrew Lunn } 6141323061aSAndrew Lunn 6151323061aSAndrew Lunn static void sfp_hwmon_calibrate(struct sfp *sfp, unsigned int slope, int offset, 6161323061aSAndrew Lunn long *value) 6171323061aSAndrew Lunn { 6181323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_EXT_CAL) 6191323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * slope, 256) + offset; 6201323061aSAndrew Lunn } 6211323061aSAndrew Lunn 6221323061aSAndrew Lunn static void sfp_hwmon_calibrate_temp(struct sfp *sfp, long *value) 6231323061aSAndrew Lunn { 6241323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_t_slope), 6251323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_t_offset), value); 6261323061aSAndrew Lunn 6271323061aSAndrew Lunn if (*value >= 0x8000) 6281323061aSAndrew Lunn *value -= 0x10000; 6291323061aSAndrew Lunn 6301323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value * 1000, 256); 6311323061aSAndrew Lunn } 6321323061aSAndrew Lunn 6331323061aSAndrew Lunn static void sfp_hwmon_calibrate_vcc(struct sfp *sfp, long *value) 6341323061aSAndrew Lunn { 6351323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_v_slope), 6361323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_v_offset), value); 6371323061aSAndrew Lunn 6381323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6391323061aSAndrew Lunn } 6401323061aSAndrew Lunn 6411323061aSAndrew Lunn static void sfp_hwmon_calibrate_bias(struct sfp *sfp, long *value) 6421323061aSAndrew Lunn { 6431323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txi_slope), 6441323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txi_offset), value); 6451323061aSAndrew Lunn 6461323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 500); 6471323061aSAndrew Lunn } 6481323061aSAndrew Lunn 6491323061aSAndrew Lunn static void sfp_hwmon_calibrate_tx_power(struct sfp *sfp, long *value) 6501323061aSAndrew Lunn { 6511323061aSAndrew Lunn sfp_hwmon_calibrate(sfp, be16_to_cpu(sfp->diag.cal_txpwr_slope), 6521323061aSAndrew Lunn be16_to_cpu(sfp->diag.cal_txpwr_offset), value); 6531323061aSAndrew Lunn 6541323061aSAndrew Lunn *value = DIV_ROUND_CLOSEST(*value, 10); 6551323061aSAndrew Lunn } 6561323061aSAndrew Lunn 6571323061aSAndrew Lunn static int sfp_hwmon_read_temp(struct sfp *sfp, int reg, long *value) 6581323061aSAndrew Lunn { 6591323061aSAndrew Lunn int err; 6601323061aSAndrew Lunn 6611323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6621323061aSAndrew Lunn if (err < 0) 6631323061aSAndrew Lunn return err; 6641323061aSAndrew Lunn 6651323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 6661323061aSAndrew Lunn 6671323061aSAndrew Lunn return 0; 6681323061aSAndrew Lunn } 6691323061aSAndrew Lunn 6701323061aSAndrew Lunn static int sfp_hwmon_read_vcc(struct sfp *sfp, int reg, long *value) 6711323061aSAndrew Lunn { 6721323061aSAndrew Lunn int err; 6731323061aSAndrew Lunn 6741323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6751323061aSAndrew Lunn if (err < 0) 6761323061aSAndrew Lunn return err; 6771323061aSAndrew Lunn 6781323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 6791323061aSAndrew Lunn 6801323061aSAndrew Lunn return 0; 6811323061aSAndrew Lunn } 6821323061aSAndrew Lunn 6831323061aSAndrew Lunn static int sfp_hwmon_read_bias(struct sfp *sfp, int reg, long *value) 6841323061aSAndrew Lunn { 6851323061aSAndrew Lunn int err; 6861323061aSAndrew Lunn 6871323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 6881323061aSAndrew Lunn if (err < 0) 6891323061aSAndrew Lunn return err; 6901323061aSAndrew Lunn 6911323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 6921323061aSAndrew Lunn 6931323061aSAndrew Lunn return 0; 6941323061aSAndrew Lunn } 6951323061aSAndrew Lunn 6961323061aSAndrew Lunn static int sfp_hwmon_read_tx_power(struct sfp *sfp, int reg, long *value) 6971323061aSAndrew Lunn { 6981323061aSAndrew Lunn int err; 6991323061aSAndrew Lunn 7001323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7011323061aSAndrew Lunn if (err < 0) 7021323061aSAndrew Lunn return err; 7031323061aSAndrew Lunn 7041323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 7051323061aSAndrew Lunn 7061323061aSAndrew Lunn return 0; 7071323061aSAndrew Lunn } 7081323061aSAndrew Lunn 7091323061aSAndrew Lunn static int sfp_hwmon_read_rx_power(struct sfp *sfp, int reg, long *value) 7101323061aSAndrew Lunn { 7111323061aSAndrew Lunn int err; 7121323061aSAndrew Lunn 7131323061aSAndrew Lunn err = sfp_hwmon_read_sensor(sfp, reg, value); 7141323061aSAndrew Lunn if (err < 0) 7151323061aSAndrew Lunn return err; 7161323061aSAndrew Lunn 7171323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 7181323061aSAndrew Lunn 7191323061aSAndrew Lunn return 0; 7201323061aSAndrew Lunn } 7211323061aSAndrew Lunn 7221323061aSAndrew Lunn static int sfp_hwmon_temp(struct sfp *sfp, u32 attr, long *value) 7231323061aSAndrew Lunn { 7241323061aSAndrew Lunn u8 status; 7251323061aSAndrew Lunn int err; 7261323061aSAndrew Lunn 7271323061aSAndrew Lunn switch (attr) { 7281323061aSAndrew Lunn case hwmon_temp_input: 7291323061aSAndrew Lunn return sfp_hwmon_read_temp(sfp, SFP_TEMP, value); 7301323061aSAndrew Lunn 7311323061aSAndrew Lunn case hwmon_temp_lcrit: 7321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_alarm); 7331323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7341323061aSAndrew Lunn return 0; 7351323061aSAndrew Lunn 7361323061aSAndrew Lunn case hwmon_temp_min: 7371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_low_warn); 7381323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7391323061aSAndrew Lunn return 0; 7401323061aSAndrew Lunn case hwmon_temp_max: 7411323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_warn); 7421323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7431323061aSAndrew Lunn return 0; 7441323061aSAndrew Lunn 7451323061aSAndrew Lunn case hwmon_temp_crit: 7461323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.temp_high_alarm); 7471323061aSAndrew Lunn sfp_hwmon_calibrate_temp(sfp, value); 7481323061aSAndrew Lunn return 0; 7491323061aSAndrew Lunn 7501323061aSAndrew Lunn case hwmon_temp_lcrit_alarm: 7511323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7521323061aSAndrew Lunn if (err < 0) 7531323061aSAndrew Lunn return err; 7541323061aSAndrew Lunn 7551323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_LOW); 7561323061aSAndrew Lunn return 0; 7571323061aSAndrew Lunn 7581323061aSAndrew Lunn case hwmon_temp_min_alarm: 7591323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7601323061aSAndrew Lunn if (err < 0) 7611323061aSAndrew Lunn return err; 7621323061aSAndrew Lunn 7631323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_LOW); 7641323061aSAndrew Lunn return 0; 7651323061aSAndrew Lunn 7661323061aSAndrew Lunn case hwmon_temp_max_alarm: 7671323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 7681323061aSAndrew Lunn if (err < 0) 7691323061aSAndrew Lunn return err; 7701323061aSAndrew Lunn 7711323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TEMP_HIGH); 7721323061aSAndrew Lunn return 0; 7731323061aSAndrew Lunn 7741323061aSAndrew Lunn case hwmon_temp_crit_alarm: 7751323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 7761323061aSAndrew Lunn if (err < 0) 7771323061aSAndrew Lunn return err; 7781323061aSAndrew Lunn 7791323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TEMP_HIGH); 7801323061aSAndrew Lunn return 0; 7811323061aSAndrew Lunn default: 7821323061aSAndrew Lunn return -EOPNOTSUPP; 7831323061aSAndrew Lunn } 7841323061aSAndrew Lunn 7851323061aSAndrew Lunn return -EOPNOTSUPP; 7861323061aSAndrew Lunn } 7871323061aSAndrew Lunn 7881323061aSAndrew Lunn static int sfp_hwmon_vcc(struct sfp *sfp, u32 attr, long *value) 7891323061aSAndrew Lunn { 7901323061aSAndrew Lunn u8 status; 7911323061aSAndrew Lunn int err; 7921323061aSAndrew Lunn 7931323061aSAndrew Lunn switch (attr) { 7941323061aSAndrew Lunn case hwmon_in_input: 7951323061aSAndrew Lunn return sfp_hwmon_read_vcc(sfp, SFP_VCC, value); 7961323061aSAndrew Lunn 7971323061aSAndrew Lunn case hwmon_in_lcrit: 7981323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_alarm); 7991323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8001323061aSAndrew Lunn return 0; 8011323061aSAndrew Lunn 8021323061aSAndrew Lunn case hwmon_in_min: 8031323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_low_warn); 8041323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8051323061aSAndrew Lunn return 0; 8061323061aSAndrew Lunn 8071323061aSAndrew Lunn case hwmon_in_max: 8081323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_warn); 8091323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8101323061aSAndrew Lunn return 0; 8111323061aSAndrew Lunn 8121323061aSAndrew Lunn case hwmon_in_crit: 8131323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.volt_high_alarm); 8141323061aSAndrew Lunn sfp_hwmon_calibrate_vcc(sfp, value); 8151323061aSAndrew Lunn return 0; 8161323061aSAndrew Lunn 8171323061aSAndrew Lunn case hwmon_in_lcrit_alarm: 8181323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8191323061aSAndrew Lunn if (err < 0) 8201323061aSAndrew Lunn return err; 8211323061aSAndrew Lunn 8221323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_LOW); 8231323061aSAndrew Lunn return 0; 8241323061aSAndrew Lunn 8251323061aSAndrew Lunn case hwmon_in_min_alarm: 8261323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8271323061aSAndrew Lunn if (err < 0) 8281323061aSAndrew Lunn return err; 8291323061aSAndrew Lunn 8301323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_LOW); 8311323061aSAndrew Lunn return 0; 8321323061aSAndrew Lunn 8331323061aSAndrew Lunn case hwmon_in_max_alarm: 8341323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8351323061aSAndrew Lunn if (err < 0) 8361323061aSAndrew Lunn return err; 8371323061aSAndrew Lunn 8381323061aSAndrew Lunn *value = !!(status & SFP_WARN0_VCC_HIGH); 8391323061aSAndrew Lunn return 0; 8401323061aSAndrew Lunn 8411323061aSAndrew Lunn case hwmon_in_crit_alarm: 8421323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8431323061aSAndrew Lunn if (err < 0) 8441323061aSAndrew Lunn return err; 8451323061aSAndrew Lunn 8461323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_VCC_HIGH); 8471323061aSAndrew Lunn return 0; 8481323061aSAndrew Lunn default: 8491323061aSAndrew Lunn return -EOPNOTSUPP; 8501323061aSAndrew Lunn } 8511323061aSAndrew Lunn 8521323061aSAndrew Lunn return -EOPNOTSUPP; 8531323061aSAndrew Lunn } 8541323061aSAndrew Lunn 8551323061aSAndrew Lunn static int sfp_hwmon_bias(struct sfp *sfp, u32 attr, long *value) 8561323061aSAndrew Lunn { 8571323061aSAndrew Lunn u8 status; 8581323061aSAndrew Lunn int err; 8591323061aSAndrew Lunn 8601323061aSAndrew Lunn switch (attr) { 8611323061aSAndrew Lunn case hwmon_curr_input: 8621323061aSAndrew Lunn return sfp_hwmon_read_bias(sfp, SFP_TX_BIAS, value); 8631323061aSAndrew Lunn 8641323061aSAndrew Lunn case hwmon_curr_lcrit: 8651323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_alarm); 8661323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8671323061aSAndrew Lunn return 0; 8681323061aSAndrew Lunn 8691323061aSAndrew Lunn case hwmon_curr_min: 8701323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_low_warn); 8711323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8721323061aSAndrew Lunn return 0; 8731323061aSAndrew Lunn 8741323061aSAndrew Lunn case hwmon_curr_max: 8751323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_warn); 8761323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8771323061aSAndrew Lunn return 0; 8781323061aSAndrew Lunn 8791323061aSAndrew Lunn case hwmon_curr_crit: 8801323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.bias_high_alarm); 8811323061aSAndrew Lunn sfp_hwmon_calibrate_bias(sfp, value); 8821323061aSAndrew Lunn return 0; 8831323061aSAndrew Lunn 8841323061aSAndrew Lunn case hwmon_curr_lcrit_alarm: 8851323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 8861323061aSAndrew Lunn if (err < 0) 8871323061aSAndrew Lunn return err; 8881323061aSAndrew Lunn 8891323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_LOW); 8901323061aSAndrew Lunn return 0; 8911323061aSAndrew Lunn 8921323061aSAndrew Lunn case hwmon_curr_min_alarm: 8931323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 8941323061aSAndrew Lunn if (err < 0) 8951323061aSAndrew Lunn return err; 8961323061aSAndrew Lunn 8971323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_LOW); 8981323061aSAndrew Lunn return 0; 8991323061aSAndrew Lunn 9001323061aSAndrew Lunn case hwmon_curr_max_alarm: 9011323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9021323061aSAndrew Lunn if (err < 0) 9031323061aSAndrew Lunn return err; 9041323061aSAndrew Lunn 9051323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TX_BIAS_HIGH); 9061323061aSAndrew Lunn return 0; 9071323061aSAndrew Lunn 9081323061aSAndrew Lunn case hwmon_curr_crit_alarm: 9091323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9101323061aSAndrew Lunn if (err < 0) 9111323061aSAndrew Lunn return err; 9121323061aSAndrew Lunn 9131323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TX_BIAS_HIGH); 9141323061aSAndrew Lunn return 0; 9151323061aSAndrew Lunn default: 9161323061aSAndrew Lunn return -EOPNOTSUPP; 9171323061aSAndrew Lunn } 9181323061aSAndrew Lunn 9191323061aSAndrew Lunn return -EOPNOTSUPP; 9201323061aSAndrew Lunn } 9211323061aSAndrew Lunn 9221323061aSAndrew Lunn static int sfp_hwmon_tx_power(struct sfp *sfp, u32 attr, long *value) 9231323061aSAndrew Lunn { 9241323061aSAndrew Lunn u8 status; 9251323061aSAndrew Lunn int err; 9261323061aSAndrew Lunn 9271323061aSAndrew Lunn switch (attr) { 9281323061aSAndrew Lunn case hwmon_power_input: 9291323061aSAndrew Lunn return sfp_hwmon_read_tx_power(sfp, SFP_TX_POWER, value); 9301323061aSAndrew Lunn 9311323061aSAndrew Lunn case hwmon_power_lcrit: 9321323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_alarm); 9331323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9341323061aSAndrew Lunn return 0; 9351323061aSAndrew Lunn 9361323061aSAndrew Lunn case hwmon_power_min: 9371323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_low_warn); 9381323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9391323061aSAndrew Lunn return 0; 9401323061aSAndrew Lunn 9411323061aSAndrew Lunn case hwmon_power_max: 9421323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_warn); 9431323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9441323061aSAndrew Lunn return 0; 9451323061aSAndrew Lunn 9461323061aSAndrew Lunn case hwmon_power_crit: 9471323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.txpwr_high_alarm); 9481323061aSAndrew Lunn sfp_hwmon_calibrate_tx_power(sfp, value); 9491323061aSAndrew Lunn return 0; 9501323061aSAndrew Lunn 9511323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 9521323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9531323061aSAndrew Lunn if (err < 0) 9541323061aSAndrew Lunn return err; 9551323061aSAndrew Lunn 9561323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_LOW); 9571323061aSAndrew Lunn return 0; 9581323061aSAndrew Lunn 9591323061aSAndrew Lunn case hwmon_power_min_alarm: 9601323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9611323061aSAndrew Lunn if (err < 0) 9621323061aSAndrew Lunn return err; 9631323061aSAndrew Lunn 9641323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_LOW); 9651323061aSAndrew Lunn return 0; 9661323061aSAndrew Lunn 9671323061aSAndrew Lunn case hwmon_power_max_alarm: 9681323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN0, &status, sizeof(status)); 9691323061aSAndrew Lunn if (err < 0) 9701323061aSAndrew Lunn return err; 9711323061aSAndrew Lunn 9721323061aSAndrew Lunn *value = !!(status & SFP_WARN0_TXPWR_HIGH); 9731323061aSAndrew Lunn return 0; 9741323061aSAndrew Lunn 9751323061aSAndrew Lunn case hwmon_power_crit_alarm: 9761323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM0, &status, sizeof(status)); 9771323061aSAndrew Lunn if (err < 0) 9781323061aSAndrew Lunn return err; 9791323061aSAndrew Lunn 9801323061aSAndrew Lunn *value = !!(status & SFP_ALARM0_TXPWR_HIGH); 9811323061aSAndrew Lunn return 0; 9821323061aSAndrew Lunn default: 9831323061aSAndrew Lunn return -EOPNOTSUPP; 9841323061aSAndrew Lunn } 9851323061aSAndrew Lunn 9861323061aSAndrew Lunn return -EOPNOTSUPP; 9871323061aSAndrew Lunn } 9881323061aSAndrew Lunn 9891323061aSAndrew Lunn static int sfp_hwmon_rx_power(struct sfp *sfp, u32 attr, long *value) 9901323061aSAndrew Lunn { 9911323061aSAndrew Lunn u8 status; 9921323061aSAndrew Lunn int err; 9931323061aSAndrew Lunn 9941323061aSAndrew Lunn switch (attr) { 9951323061aSAndrew Lunn case hwmon_power_input: 9961323061aSAndrew Lunn return sfp_hwmon_read_rx_power(sfp, SFP_RX_POWER, value); 9971323061aSAndrew Lunn 9981323061aSAndrew Lunn case hwmon_power_lcrit: 9991323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_alarm); 10001323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10011323061aSAndrew Lunn return 0; 10021323061aSAndrew Lunn 10031323061aSAndrew Lunn case hwmon_power_min: 10041323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_low_warn); 10051323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10061323061aSAndrew Lunn return 0; 10071323061aSAndrew Lunn 10081323061aSAndrew Lunn case hwmon_power_max: 10091323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_warn); 10101323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10111323061aSAndrew Lunn return 0; 10121323061aSAndrew Lunn 10131323061aSAndrew Lunn case hwmon_power_crit: 10141323061aSAndrew Lunn *value = be16_to_cpu(sfp->diag.rxpwr_high_alarm); 10151323061aSAndrew Lunn sfp_hwmon_to_rx_power(value); 10161323061aSAndrew Lunn return 0; 10171323061aSAndrew Lunn 10181323061aSAndrew Lunn case hwmon_power_lcrit_alarm: 10191323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10201323061aSAndrew Lunn if (err < 0) 10211323061aSAndrew Lunn return err; 10221323061aSAndrew Lunn 10231323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_LOW); 10241323061aSAndrew Lunn return 0; 10251323061aSAndrew Lunn 10261323061aSAndrew Lunn case hwmon_power_min_alarm: 10271323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10281323061aSAndrew Lunn if (err < 0) 10291323061aSAndrew Lunn return err; 10301323061aSAndrew Lunn 10311323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_LOW); 10321323061aSAndrew Lunn return 0; 10331323061aSAndrew Lunn 10341323061aSAndrew Lunn case hwmon_power_max_alarm: 10351323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_WARN1, &status, sizeof(status)); 10361323061aSAndrew Lunn if (err < 0) 10371323061aSAndrew Lunn return err; 10381323061aSAndrew Lunn 10391323061aSAndrew Lunn *value = !!(status & SFP_WARN1_RXPWR_HIGH); 10401323061aSAndrew Lunn return 0; 10411323061aSAndrew Lunn 10421323061aSAndrew Lunn case hwmon_power_crit_alarm: 10431323061aSAndrew Lunn err = sfp_read(sfp, true, SFP_ALARM1, &status, sizeof(status)); 10441323061aSAndrew Lunn if (err < 0) 10451323061aSAndrew Lunn return err; 10461323061aSAndrew Lunn 10471323061aSAndrew Lunn *value = !!(status & SFP_ALARM1_RXPWR_HIGH); 10481323061aSAndrew Lunn return 0; 10491323061aSAndrew Lunn default: 10501323061aSAndrew Lunn return -EOPNOTSUPP; 10511323061aSAndrew Lunn } 10521323061aSAndrew Lunn 10531323061aSAndrew Lunn return -EOPNOTSUPP; 10541323061aSAndrew Lunn } 10551323061aSAndrew Lunn 10561323061aSAndrew Lunn static int sfp_hwmon_read(struct device *dev, enum hwmon_sensor_types type, 10571323061aSAndrew Lunn u32 attr, int channel, long *value) 10581323061aSAndrew Lunn { 10591323061aSAndrew Lunn struct sfp *sfp = dev_get_drvdata(dev); 10601323061aSAndrew Lunn 10611323061aSAndrew Lunn switch (type) { 10621323061aSAndrew Lunn case hwmon_temp: 10631323061aSAndrew Lunn return sfp_hwmon_temp(sfp, attr, value); 10641323061aSAndrew Lunn case hwmon_in: 10651323061aSAndrew Lunn return sfp_hwmon_vcc(sfp, attr, value); 10661323061aSAndrew Lunn case hwmon_curr: 10671323061aSAndrew Lunn return sfp_hwmon_bias(sfp, attr, value); 10681323061aSAndrew Lunn case hwmon_power: 10691323061aSAndrew Lunn switch (channel) { 10701323061aSAndrew Lunn case 0: 10711323061aSAndrew Lunn return sfp_hwmon_tx_power(sfp, attr, value); 10721323061aSAndrew Lunn case 1: 10731323061aSAndrew Lunn return sfp_hwmon_rx_power(sfp, attr, value); 10741323061aSAndrew Lunn default: 10751323061aSAndrew Lunn return -EOPNOTSUPP; 10761323061aSAndrew Lunn } 10771323061aSAndrew Lunn default: 10781323061aSAndrew Lunn return -EOPNOTSUPP; 10791323061aSAndrew Lunn } 10801323061aSAndrew Lunn } 10811323061aSAndrew Lunn 1082c1236979SAndrew Lunn static const char *const sfp_hwmon_power_labels[] = { 1083c1236979SAndrew Lunn "TX_power", 1084c1236979SAndrew Lunn "RX_power", 1085c1236979SAndrew Lunn }; 1086c1236979SAndrew Lunn 1087c1236979SAndrew Lunn static int sfp_hwmon_read_string(struct device *dev, 1088c1236979SAndrew Lunn enum hwmon_sensor_types type, 1089c1236979SAndrew Lunn u32 attr, int channel, const char **str) 1090c1236979SAndrew Lunn { 1091c1236979SAndrew Lunn switch (type) { 1092c1236979SAndrew Lunn case hwmon_curr: 1093c1236979SAndrew Lunn switch (attr) { 1094c1236979SAndrew Lunn case hwmon_curr_label: 1095c1236979SAndrew Lunn *str = "bias"; 1096c1236979SAndrew Lunn return 0; 1097c1236979SAndrew Lunn default: 1098c1236979SAndrew Lunn return -EOPNOTSUPP; 1099c1236979SAndrew Lunn } 1100c1236979SAndrew Lunn break; 1101c1236979SAndrew Lunn case hwmon_temp: 1102c1236979SAndrew Lunn switch (attr) { 1103c1236979SAndrew Lunn case hwmon_temp_label: 1104c1236979SAndrew Lunn *str = "temperature"; 1105c1236979SAndrew Lunn return 0; 1106c1236979SAndrew Lunn default: 1107c1236979SAndrew Lunn return -EOPNOTSUPP; 1108c1236979SAndrew Lunn } 1109c1236979SAndrew Lunn break; 1110c1236979SAndrew Lunn case hwmon_in: 1111c1236979SAndrew Lunn switch (attr) { 1112c1236979SAndrew Lunn case hwmon_in_label: 1113c1236979SAndrew Lunn *str = "VCC"; 1114c1236979SAndrew Lunn return 0; 1115c1236979SAndrew Lunn default: 1116c1236979SAndrew Lunn return -EOPNOTSUPP; 1117c1236979SAndrew Lunn } 1118c1236979SAndrew Lunn break; 1119c1236979SAndrew Lunn case hwmon_power: 1120c1236979SAndrew Lunn switch (attr) { 1121c1236979SAndrew Lunn case hwmon_power_label: 1122c1236979SAndrew Lunn *str = sfp_hwmon_power_labels[channel]; 1123c1236979SAndrew Lunn return 0; 1124c1236979SAndrew Lunn default: 1125c1236979SAndrew Lunn return -EOPNOTSUPP; 1126c1236979SAndrew Lunn } 1127c1236979SAndrew Lunn break; 1128c1236979SAndrew Lunn default: 1129c1236979SAndrew Lunn return -EOPNOTSUPP; 1130c1236979SAndrew Lunn } 1131c1236979SAndrew Lunn 1132c1236979SAndrew Lunn return -EOPNOTSUPP; 1133c1236979SAndrew Lunn } 1134c1236979SAndrew Lunn 11351323061aSAndrew Lunn static const struct hwmon_ops sfp_hwmon_ops = { 11361323061aSAndrew Lunn .is_visible = sfp_hwmon_is_visible, 11371323061aSAndrew Lunn .read = sfp_hwmon_read, 1138c1236979SAndrew Lunn .read_string = sfp_hwmon_read_string, 11391323061aSAndrew Lunn }; 11401323061aSAndrew Lunn 11411323061aSAndrew Lunn static u32 sfp_hwmon_chip_config[] = { 11421323061aSAndrew Lunn HWMON_C_REGISTER_TZ, 11431323061aSAndrew Lunn 0, 11441323061aSAndrew Lunn }; 11451323061aSAndrew Lunn 11461323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_chip = { 11471323061aSAndrew Lunn .type = hwmon_chip, 11481323061aSAndrew Lunn .config = sfp_hwmon_chip_config, 11491323061aSAndrew Lunn }; 11501323061aSAndrew Lunn 11511323061aSAndrew Lunn static u32 sfp_hwmon_temp_config[] = { 11521323061aSAndrew Lunn HWMON_T_INPUT | 11531323061aSAndrew Lunn HWMON_T_MAX | HWMON_T_MIN | 11541323061aSAndrew Lunn HWMON_T_MAX_ALARM | HWMON_T_MIN_ALARM | 11551323061aSAndrew Lunn HWMON_T_CRIT | HWMON_T_LCRIT | 1156c1236979SAndrew Lunn HWMON_T_CRIT_ALARM | HWMON_T_LCRIT_ALARM | 1157c1236979SAndrew Lunn HWMON_T_LABEL, 11581323061aSAndrew Lunn 0, 11591323061aSAndrew Lunn }; 11601323061aSAndrew Lunn 11611323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_temp_channel_info = { 11621323061aSAndrew Lunn .type = hwmon_temp, 11631323061aSAndrew Lunn .config = sfp_hwmon_temp_config, 11641323061aSAndrew Lunn }; 11651323061aSAndrew Lunn 11661323061aSAndrew Lunn static u32 sfp_hwmon_vcc_config[] = { 11671323061aSAndrew Lunn HWMON_I_INPUT | 11681323061aSAndrew Lunn HWMON_I_MAX | HWMON_I_MIN | 11691323061aSAndrew Lunn HWMON_I_MAX_ALARM | HWMON_I_MIN_ALARM | 11701323061aSAndrew Lunn HWMON_I_CRIT | HWMON_I_LCRIT | 1171c1236979SAndrew Lunn HWMON_I_CRIT_ALARM | HWMON_I_LCRIT_ALARM | 1172c1236979SAndrew Lunn HWMON_I_LABEL, 11731323061aSAndrew Lunn 0, 11741323061aSAndrew Lunn }; 11751323061aSAndrew Lunn 11761323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_vcc_channel_info = { 11771323061aSAndrew Lunn .type = hwmon_in, 11781323061aSAndrew Lunn .config = sfp_hwmon_vcc_config, 11791323061aSAndrew Lunn }; 11801323061aSAndrew Lunn 11811323061aSAndrew Lunn static u32 sfp_hwmon_bias_config[] = { 11821323061aSAndrew Lunn HWMON_C_INPUT | 11831323061aSAndrew Lunn HWMON_C_MAX | HWMON_C_MIN | 11841323061aSAndrew Lunn HWMON_C_MAX_ALARM | HWMON_C_MIN_ALARM | 11851323061aSAndrew Lunn HWMON_C_CRIT | HWMON_C_LCRIT | 1186c1236979SAndrew Lunn HWMON_C_CRIT_ALARM | HWMON_C_LCRIT_ALARM | 1187c1236979SAndrew Lunn HWMON_C_LABEL, 11881323061aSAndrew Lunn 0, 11891323061aSAndrew Lunn }; 11901323061aSAndrew Lunn 11911323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_bias_channel_info = { 11921323061aSAndrew Lunn .type = hwmon_curr, 11931323061aSAndrew Lunn .config = sfp_hwmon_bias_config, 11941323061aSAndrew Lunn }; 11951323061aSAndrew Lunn 11961323061aSAndrew Lunn static u32 sfp_hwmon_power_config[] = { 11971323061aSAndrew Lunn /* Transmit power */ 11981323061aSAndrew Lunn HWMON_P_INPUT | 11991323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12001323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12011323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1202c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1203c1236979SAndrew Lunn HWMON_P_LABEL, 12041323061aSAndrew Lunn /* Receive power */ 12051323061aSAndrew Lunn HWMON_P_INPUT | 12061323061aSAndrew Lunn HWMON_P_MAX | HWMON_P_MIN | 12071323061aSAndrew Lunn HWMON_P_MAX_ALARM | HWMON_P_MIN_ALARM | 12081323061aSAndrew Lunn HWMON_P_CRIT | HWMON_P_LCRIT | 1209c1236979SAndrew Lunn HWMON_P_CRIT_ALARM | HWMON_P_LCRIT_ALARM | 1210c1236979SAndrew Lunn HWMON_P_LABEL, 12111323061aSAndrew Lunn 0, 12121323061aSAndrew Lunn }; 12131323061aSAndrew Lunn 12141323061aSAndrew Lunn static const struct hwmon_channel_info sfp_hwmon_power_channel_info = { 12151323061aSAndrew Lunn .type = hwmon_power, 12161323061aSAndrew Lunn .config = sfp_hwmon_power_config, 12171323061aSAndrew Lunn }; 12181323061aSAndrew Lunn 12191323061aSAndrew Lunn static const struct hwmon_channel_info *sfp_hwmon_info[] = { 12201323061aSAndrew Lunn &sfp_hwmon_chip, 12211323061aSAndrew Lunn &sfp_hwmon_vcc_channel_info, 12221323061aSAndrew Lunn &sfp_hwmon_temp_channel_info, 12231323061aSAndrew Lunn &sfp_hwmon_bias_channel_info, 12241323061aSAndrew Lunn &sfp_hwmon_power_channel_info, 12251323061aSAndrew Lunn NULL, 12261323061aSAndrew Lunn }; 12271323061aSAndrew Lunn 12281323061aSAndrew Lunn static const struct hwmon_chip_info sfp_hwmon_chip_info = { 12291323061aSAndrew Lunn .ops = &sfp_hwmon_ops, 12301323061aSAndrew Lunn .info = sfp_hwmon_info, 12311323061aSAndrew Lunn }; 12321323061aSAndrew Lunn 1233139d3a21SRussell King static void sfp_hwmon_probe(struct work_struct *work) 12341323061aSAndrew Lunn { 1235139d3a21SRussell King struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); 12361323061aSAndrew Lunn int err, i; 12371323061aSAndrew Lunn 1238139d3a21SRussell King err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); 1239139d3a21SRussell King if (err < 0) { 1240139d3a21SRussell King if (sfp->hwmon_tries--) { 1241139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1242139d3a21SRussell King T_PROBE_RETRY_SLOW); 1243139d3a21SRussell King } else { 1244139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1245139d3a21SRussell King } 1246139d3a21SRussell King return; 1247139d3a21SRussell King } 1248139d3a21SRussell King 1249139d3a21SRussell King sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); 1250139d3a21SRussell King if (!sfp->hwmon_name) { 1251139d3a21SRussell King dev_err(sfp->dev, "out of memory for hwmon name\n"); 1252139d3a21SRussell King return; 1253139d3a21SRussell King } 1254139d3a21SRussell King 1255139d3a21SRussell King for (i = 0; sfp->hwmon_name[i]; i++) 1256139d3a21SRussell King if (hwmon_is_bad_char(sfp->hwmon_name[i])) 1257139d3a21SRussell King sfp->hwmon_name[i] = '_'; 1258139d3a21SRussell King 1259139d3a21SRussell King sfp->hwmon_dev = hwmon_device_register_with_info(sfp->dev, 1260139d3a21SRussell King sfp->hwmon_name, sfp, 1261139d3a21SRussell King &sfp_hwmon_chip_info, 1262139d3a21SRussell King NULL); 1263139d3a21SRussell King if (IS_ERR(sfp->hwmon_dev)) 1264139d3a21SRussell King dev_err(sfp->dev, "failed to register hwmon device: %ld\n", 1265139d3a21SRussell King PTR_ERR(sfp->hwmon_dev)); 1266139d3a21SRussell King } 1267139d3a21SRussell King 1268139d3a21SRussell King static int sfp_hwmon_insert(struct sfp *sfp) 1269139d3a21SRussell King { 12701323061aSAndrew Lunn if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) 12711323061aSAndrew Lunn return 0; 12721323061aSAndrew Lunn 12731323061aSAndrew Lunn if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) 12741323061aSAndrew Lunn return 0; 12751323061aSAndrew Lunn 12761323061aSAndrew Lunn if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 12771323061aSAndrew Lunn /* This driver in general does not support address 12781323061aSAndrew Lunn * change. 12791323061aSAndrew Lunn */ 12801323061aSAndrew Lunn return 0; 12811323061aSAndrew Lunn 1282139d3a21SRussell King mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); 1283139d3a21SRussell King sfp->hwmon_tries = R_PROBE_RETRY_SLOW; 12841323061aSAndrew Lunn 1285139d3a21SRussell King return 0; 12861323061aSAndrew Lunn } 12871323061aSAndrew Lunn 12881323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 12891323061aSAndrew Lunn { 1290139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 12913e322474SAndrew Lunn if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { 12921323061aSAndrew Lunn hwmon_device_unregister(sfp->hwmon_dev); 12933e322474SAndrew Lunn sfp->hwmon_dev = NULL; 12941323061aSAndrew Lunn kfree(sfp->hwmon_name); 12951323061aSAndrew Lunn } 12963e322474SAndrew Lunn } 1297139d3a21SRussell King 1298139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1299139d3a21SRussell King { 1300139d3a21SRussell King INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); 1301139d3a21SRussell King 1302139d3a21SRussell King return 0; 1303139d3a21SRussell King } 1304139d3a21SRussell King 1305139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1306139d3a21SRussell King { 1307139d3a21SRussell King cancel_delayed_work_sync(&sfp->hwmon_probe); 1308139d3a21SRussell King } 13091323061aSAndrew Lunn #else 13101323061aSAndrew Lunn static int sfp_hwmon_insert(struct sfp *sfp) 13111323061aSAndrew Lunn { 13121323061aSAndrew Lunn return 0; 13131323061aSAndrew Lunn } 13141323061aSAndrew Lunn 13151323061aSAndrew Lunn static void sfp_hwmon_remove(struct sfp *sfp) 13161323061aSAndrew Lunn { 13171323061aSAndrew Lunn } 1318139d3a21SRussell King 1319139d3a21SRussell King static int sfp_hwmon_init(struct sfp *sfp) 1320139d3a21SRussell King { 1321139d3a21SRussell King return 0; 1322139d3a21SRussell King } 1323139d3a21SRussell King 1324139d3a21SRussell King static void sfp_hwmon_exit(struct sfp *sfp) 1325139d3a21SRussell King { 1326139d3a21SRussell King } 13271323061aSAndrew Lunn #endif 13281323061aSAndrew Lunn 132973970055SRussell King /* Helpers */ 133073970055SRussell King static void sfp_module_tx_disable(struct sfp *sfp) 133173970055SRussell King { 133273970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 133373970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 1); 133473970055SRussell King sfp->state |= SFP_F_TX_DISABLE; 133573970055SRussell King sfp_set_state(sfp, sfp->state); 133673970055SRussell King } 133773970055SRussell King 133873970055SRussell King static void sfp_module_tx_enable(struct sfp *sfp) 133973970055SRussell King { 134073970055SRussell King dev_dbg(sfp->dev, "tx disable %u -> %u\n", 134173970055SRussell King sfp->state & SFP_F_TX_DISABLE ? 1 : 0, 0); 134273970055SRussell King sfp->state &= ~SFP_F_TX_DISABLE; 134373970055SRussell King sfp_set_state(sfp, sfp->state); 134473970055SRussell King } 134573970055SRussell King 134673970055SRussell King static void sfp_module_tx_fault_reset(struct sfp *sfp) 134773970055SRussell King { 134873970055SRussell King unsigned int state = sfp->state; 134973970055SRussell King 135073970055SRussell King if (state & SFP_F_TX_DISABLE) 135173970055SRussell King return; 135273970055SRussell King 135373970055SRussell King sfp_set_state(sfp, state | SFP_F_TX_DISABLE); 135473970055SRussell King 135573970055SRussell King udelay(T_RESET_US); 135673970055SRussell King 135773970055SRussell King sfp_set_state(sfp, state); 135873970055SRussell King } 135973970055SRussell King 136073970055SRussell King /* SFP state machine */ 136173970055SRussell King static void sfp_sm_set_timer(struct sfp *sfp, unsigned int timeout) 136273970055SRussell King { 136373970055SRussell King if (timeout) 136473970055SRussell King mod_delayed_work(system_power_efficient_wq, &sfp->timeout, 136573970055SRussell King timeout); 136673970055SRussell King else 136773970055SRussell King cancel_delayed_work(&sfp->timeout); 136873970055SRussell King } 136973970055SRussell King 137073970055SRussell King static void sfp_sm_next(struct sfp *sfp, unsigned int state, 137173970055SRussell King unsigned int timeout) 137273970055SRussell King { 137373970055SRussell King sfp->sm_state = state; 137473970055SRussell King sfp_sm_set_timer(sfp, timeout); 137573970055SRussell King } 137673970055SRussell King 13770936ebc4SRussell King static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, 1378516b29edSFlorian Fainelli unsigned int timeout) 137973970055SRussell King { 138073970055SRussell King sfp->sm_mod_state = state; 138173970055SRussell King sfp_sm_set_timer(sfp, timeout); 138273970055SRussell King } 138373970055SRussell King 138473970055SRussell King static void sfp_sm_phy_detach(struct sfp *sfp) 138573970055SRussell King { 138673970055SRussell King phy_stop(sfp->mod_phy); 138773970055SRussell King sfp_remove_phy(sfp->sfp_bus); 138873970055SRussell King phy_device_remove(sfp->mod_phy); 138973970055SRussell King phy_device_free(sfp->mod_phy); 139073970055SRussell King sfp->mod_phy = NULL; 139173970055SRussell King } 139273970055SRussell King 139373970055SRussell King static void sfp_sm_probe_phy(struct sfp *sfp) 139473970055SRussell King { 139573970055SRussell King struct phy_device *phy; 139673970055SRussell King int err; 139773970055SRussell King 139873970055SRussell King phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); 139920b56ed9SRussell King if (phy == ERR_PTR(-ENODEV)) { 140020b56ed9SRussell King dev_info(sfp->dev, "no PHY detected\n"); 140173970055SRussell King return; 140273970055SRussell King } 140320b56ed9SRussell King if (IS_ERR(phy)) { 140420b56ed9SRussell King dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); 140573970055SRussell King return; 140673970055SRussell King } 140773970055SRussell King 140873970055SRussell King err = sfp_add_phy(sfp->sfp_bus, phy); 140973970055SRussell King if (err) { 141073970055SRussell King phy_device_remove(phy); 141173970055SRussell King phy_device_free(phy); 141273970055SRussell King dev_err(sfp->dev, "sfp_add_phy failed: %d\n", err); 141373970055SRussell King return; 141473970055SRussell King } 141573970055SRussell King 141673970055SRussell King sfp->mod_phy = phy; 141773970055SRussell King phy_start(phy); 141873970055SRussell King } 141973970055SRussell King 142073970055SRussell King static void sfp_sm_link_up(struct sfp *sfp) 142173970055SRussell King { 142273970055SRussell King sfp_link_up(sfp->sfp_bus); 142373970055SRussell King sfp_sm_next(sfp, SFP_S_LINK_UP, 0); 142473970055SRussell King } 142573970055SRussell King 142673970055SRussell King static void sfp_sm_link_down(struct sfp *sfp) 142773970055SRussell King { 142873970055SRussell King sfp_link_down(sfp->sfp_bus); 142973970055SRussell King } 143073970055SRussell King 143173970055SRussell King static void sfp_sm_link_check_los(struct sfp *sfp) 143273970055SRussell King { 143373970055SRussell King unsigned int los = sfp->state & SFP_F_LOS; 143473970055SRussell King 1435710dfbb0SRussell King /* If neither SFP_OPTIONS_LOS_INVERTED nor SFP_OPTIONS_LOS_NORMAL 1436710dfbb0SRussell King * are set, we assume that no LOS signal is available. 143773970055SRussell King */ 1438acf1c02fSRussell King if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED)) 143973970055SRussell King los ^= SFP_F_LOS; 1440710dfbb0SRussell King else if (!(sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL))) 1441710dfbb0SRussell King los = 0; 144273970055SRussell King 144373970055SRussell King if (los) 144473970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 144573970055SRussell King else 144673970055SRussell King sfp_sm_link_up(sfp); 144773970055SRussell King } 144873970055SRussell King 1449710dfbb0SRussell King static bool sfp_los_event_active(struct sfp *sfp, unsigned int event) 1450710dfbb0SRussell King { 1451710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1452710dfbb0SRussell King event == SFP_E_LOS_LOW) || 1453710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1454710dfbb0SRussell King event == SFP_E_LOS_HIGH); 1455710dfbb0SRussell King } 1456710dfbb0SRussell King 1457710dfbb0SRussell King static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) 1458710dfbb0SRussell King { 1459710dfbb0SRussell King return (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_INVERTED) && 1460710dfbb0SRussell King event == SFP_E_LOS_HIGH) || 1461710dfbb0SRussell King (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_LOS_NORMAL) && 1462710dfbb0SRussell King event == SFP_E_LOS_LOW); 1463710dfbb0SRussell King } 1464710dfbb0SRussell King 146563ec1c7cSRussell King static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) 146673970055SRussell King { 146773970055SRussell King if (sfp->sm_retries && !--sfp->sm_retries) { 1468516b29edSFlorian Fainelli dev_err(sfp->dev, 1469516b29edSFlorian Fainelli "module persistently indicates fault, disabling\n"); 147073970055SRussell King sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0); 147173970055SRussell King } else { 147273970055SRussell King if (warn) 147373970055SRussell King dev_err(sfp->dev, "module transmit fault indicated\n"); 147473970055SRussell King 147563ec1c7cSRussell King sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); 147673970055SRussell King } 147773970055SRussell King } 147873970055SRussell King 1479181f29daSRussell King static void sfp_sm_probe_for_phy(struct sfp *sfp) 1480181f29daSRussell King { 148173970055SRussell King /* Setting the serdes link mode is guesswork: there's no 148273970055SRussell King * field in the EEPROM which indicates what mode should 148373970055SRussell King * be used. 148473970055SRussell King * 148573970055SRussell King * If it's a gigabit-only fiber module, it probably does 148673970055SRussell King * not have a PHY, so switch to 802.3z negotiation mode. 148773970055SRussell King * Otherwise, switch to SGMII mode (which is required to 148873970055SRussell King * support non-gigabit speeds) and probe for a PHY. 148973970055SRussell King */ 149073970055SRussell King if (sfp->id.base.e1000_base_t || 149173970055SRussell King sfp->id.base.e100_base_lx || 149273970055SRussell King sfp->id.base.e100_base_fx) 149373970055SRussell King sfp_sm_probe_phy(sfp); 149473970055SRussell King } 149573970055SRussell King 1496ed32abb1SRussell King static int sfp_module_parse_power(struct sfp *sfp) 14973bb35261SJon Nettleton { 1498ed32abb1SRussell King u32 power_mW = 1000; 14993bb35261SJon Nettleton 15003bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) 1501ed32abb1SRussell King power_mW = 1500; 15023bb35261SJon Nettleton if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) 1503ed32abb1SRussell King power_mW = 2000; 15043bb35261SJon Nettleton 1505ed32abb1SRussell King if (power_mW > sfp->max_power_mW) { 15067cfa9c92SRussell King /* Module power specification exceeds the allowed maximum. */ 15077cfa9c92SRussell King if (sfp->id.ext.sff8472_compliance == 15087cfa9c92SRussell King SFP_SFF8472_COMPLIANCE_NONE && 15097cfa9c92SRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { 15107cfa9c92SRussell King /* The module appears not to implement bus address 15117cfa9c92SRussell King * 0xa2, so assume that the module powers up in the 15127cfa9c92SRussell King * indicated mode. 15137cfa9c92SRussell King */ 15143bb35261SJon Nettleton dev_err(sfp->dev, 15153bb35261SJon Nettleton "Host does not support %u.%uW modules\n", 1516ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15173bb35261SJon Nettleton return -EINVAL; 15187cfa9c92SRussell King } else { 15193bb35261SJon Nettleton dev_warn(sfp->dev, 15203bb35261SJon Nettleton "Host does not support %u.%uW modules, module left in power mode 1\n", 1521ed32abb1SRussell King power_mW / 1000, (power_mW / 100) % 10); 15223bb35261SJon Nettleton return 0; 15233bb35261SJon Nettleton } 15247cfa9c92SRussell King } 15257cfa9c92SRussell King 15267cfa9c92SRussell King /* If the module requires a higher power mode, but also requires 15277cfa9c92SRussell King * an address change sequence, warn the user that the module may 15287cfa9c92SRussell King * not be functional. 15297cfa9c92SRussell King */ 15307cfa9c92SRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { 15317cfa9c92SRussell King dev_warn(sfp->dev, 153207f23d90SColin Ian King "Address Change Sequence not supported but module requires %u.%uW, module may not be functional\n", 15337cfa9c92SRussell King power_mW / 1000, (power_mW / 100) % 10); 15347cfa9c92SRussell King return 0; 15357cfa9c92SRussell King } 15363bb35261SJon Nettleton 1537ed32abb1SRussell King sfp->module_power_mW = power_mW; 1538ed32abb1SRussell King 1539ed32abb1SRussell King return 0; 1540ed32abb1SRussell King } 1541ed32abb1SRussell King 1542b036a554SRussell King static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) 1543ed32abb1SRussell King { 1544ed32abb1SRussell King u8 val; 1545ed32abb1SRussell King int err; 1546ed32abb1SRussell King 15473bb35261SJon Nettleton err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15483bb35261SJon Nettleton if (err != sizeof(val)) { 15493bb35261SJon Nettleton dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); 1550b036a554SRussell King return -EAGAIN; 15513bb35261SJon Nettleton } 15523bb35261SJon Nettleton 1553b036a554SRussell King if (enable) 15543bb35261SJon Nettleton val |= BIT(0); 1555b036a554SRussell King else 1556b036a554SRussell King val &= ~BIT(0); 15573bb35261SJon Nettleton 15583bb35261SJon Nettleton err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); 15593bb35261SJon Nettleton if (err != sizeof(val)) { 15603bb35261SJon Nettleton dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); 1561b036a554SRussell King return -EAGAIN; 15623bb35261SJon Nettleton } 15633bb35261SJon Nettleton 1564b036a554SRussell King if (enable) 15653bb35261SJon Nettleton dev_info(sfp->dev, "Module switched to %u.%uW power level\n", 1566ed32abb1SRussell King sfp->module_power_mW / 1000, 1567ed32abb1SRussell King (sfp->module_power_mW / 100) % 10); 15683bb35261SJon Nettleton 1569b036a554SRussell King return 0; 15703bb35261SJon Nettleton } 15713bb35261SJon Nettleton 1572e117be74SRussell King static int sfp_sm_mod_probe(struct sfp *sfp, bool report) 157373970055SRussell King { 157473970055SRussell King /* SFP module inserted - read I2C data */ 157573970055SRussell King struct sfp_eeprom_id id; 1576981f1f80SRussell King bool cotsworks; 157773970055SRussell King u8 check; 15783bb35261SJon Nettleton int ret; 157973970055SRussell King 15803bb35261SJon Nettleton ret = sfp_read(sfp, false, 0, &id, sizeof(id)); 15813bb35261SJon Nettleton if (ret < 0) { 1582e117be74SRussell King if (report) 15833bb35261SJon Nettleton dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); 158473970055SRussell King return -EAGAIN; 158573970055SRussell King } 158673970055SRussell King 15873bb35261SJon Nettleton if (ret != sizeof(id)) { 15883bb35261SJon Nettleton dev_err(sfp->dev, "EEPROM short read: %d\n", ret); 158973970055SRussell King return -EAGAIN; 159073970055SRussell King } 159173970055SRussell King 1592981f1f80SRussell King /* Cotsworks do not seem to update the checksums when they 1593981f1f80SRussell King * do the final programming with the final module part number, 1594981f1f80SRussell King * serial number and date code. 1595981f1f80SRussell King */ 1596981f1f80SRussell King cotsworks = !memcmp(id.base.vendor_name, "COTSWORKS ", 16); 1597981f1f80SRussell King 159873970055SRussell King /* Validate the checksum over the base structure */ 159973970055SRussell King check = sfp_check(&id.base, sizeof(id.base) - 1); 160073970055SRussell King if (check != id.base.cc_base) { 1601981f1f80SRussell King if (cotsworks) { 1602981f1f80SRussell King dev_warn(sfp->dev, 1603981f1f80SRussell King "EEPROM base structure checksum failure (0x%02x != 0x%02x)\n", 1604981f1f80SRussell King check, id.base.cc_base); 1605981f1f80SRussell King } else { 160673970055SRussell King dev_err(sfp->dev, 1607981f1f80SRussell King "EEPROM base structure checksum failure: 0x%02x != 0x%02x\n", 1608981f1f80SRussell King check, id.base.cc_base); 160973970055SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1610981f1f80SRussell King 16, 1, &id, sizeof(id), true); 161173970055SRussell King return -EINVAL; 161273970055SRussell King } 1613981f1f80SRussell King } 161473970055SRussell King 161573970055SRussell King check = sfp_check(&id.ext, sizeof(id.ext) - 1); 161673970055SRussell King if (check != id.ext.cc_ext) { 1617981f1f80SRussell King if (cotsworks) { 1618981f1f80SRussell King dev_warn(sfp->dev, 1619981f1f80SRussell King "EEPROM extended structure checksum failure (0x%02x != 0x%02x)\n", 1620981f1f80SRussell King check, id.ext.cc_ext); 1621981f1f80SRussell King } else { 162273970055SRussell King dev_err(sfp->dev, 1623981f1f80SRussell King "EEPROM extended structure checksum failure: 0x%02x != 0x%02x\n", 1624981f1f80SRussell King check, id.ext.cc_ext); 1625981f1f80SRussell King print_hex_dump(KERN_ERR, "sfp EE: ", DUMP_PREFIX_OFFSET, 1626981f1f80SRussell King 16, 1, &id, sizeof(id), true); 162773970055SRussell King memset(&id.ext, 0, sizeof(id.ext)); 162873970055SRussell King } 1629981f1f80SRussell King } 163073970055SRussell King 163173970055SRussell King sfp->id = id; 163273970055SRussell King 1633a2f247efSRussell King dev_info(sfp->dev, "module %.*s %.*s rev %.*s sn %.*s dc %.*s\n", 1634a2f247efSRussell King (int)sizeof(id.base.vendor_name), id.base.vendor_name, 1635a2f247efSRussell King (int)sizeof(id.base.vendor_pn), id.base.vendor_pn, 1636a2f247efSRussell King (int)sizeof(id.base.vendor_rev), id.base.vendor_rev, 1637a2f247efSRussell King (int)sizeof(id.ext.vendor_sn), id.ext.vendor_sn, 1638a2f247efSRussell King (int)sizeof(id.ext.datecode), id.ext.datecode); 163973970055SRussell King 1640259c8618SRussell King /* Check whether we support this module */ 1641f3c9a666SRussell King if (!sfp->type->module_supported(&id)) { 1642259c8618SRussell King dev_err(sfp->dev, 1643259c8618SRussell King "module is not supported - phys id 0x%02x 0x%02x\n", 164473970055SRussell King sfp->id.base.phys_id, sfp->id.base.phys_ext_id); 164573970055SRussell King return -EINVAL; 164673970055SRussell King } 164773970055SRussell King 1648ec7681bdSRussell King /* If the module requires address swap mode, warn about it */ 1649ec7681bdSRussell King if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) 1650ec7681bdSRussell King dev_warn(sfp->dev, 1651ec7681bdSRussell King "module address swap to access page 0xA2 is not supported.\n"); 1652ec7681bdSRussell King 1653ed32abb1SRussell King /* Parse the module power requirement */ 1654ed32abb1SRussell King ret = sfp_module_parse_power(sfp); 1655ed32abb1SRussell King if (ret < 0) 1656ed32abb1SRussell King return ret; 1657ed32abb1SRussell King 1658b036a554SRussell King return 0; 165973970055SRussell King } 166073970055SRussell King 166173970055SRussell King static void sfp_sm_mod_remove(struct sfp *sfp) 166273970055SRussell King { 166373f5e847SRussell King if (sfp->sm_mod_state > SFP_MOD_WAITDEV) 166473970055SRussell King sfp_module_remove(sfp->sfp_bus); 166573970055SRussell King 16661323061aSAndrew Lunn sfp_hwmon_remove(sfp); 16671323061aSAndrew Lunn 166873970055SRussell King memset(&sfp->id, 0, sizeof(sfp->id)); 1669ed32abb1SRussell King sfp->module_power_mW = 0; 167073970055SRussell King 167173970055SRussell King dev_info(sfp->dev, "module removed\n"); 167273970055SRussell King } 167373970055SRussell King 16746b0da5c9SRussell King /* This state machine tracks the upstream's state */ 1675e85d81a1SRussell King static void sfp_sm_device(struct sfp *sfp, unsigned int event) 167673970055SRussell King { 1677e85d81a1SRussell King switch (sfp->sm_dev_state) { 1678e85d81a1SRussell King default: 16796b0da5c9SRussell King if (event == SFP_E_DEV_ATTACH) 16806b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 16816b0da5c9SRussell King break; 16826b0da5c9SRussell King 16836b0da5c9SRussell King case SFP_DEV_DOWN: 16846b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 16856b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 16866b0da5c9SRussell King else if (event == SFP_E_DEV_UP) 1687e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_UP; 1688e85d81a1SRussell King break; 168973970055SRussell King 1690e85d81a1SRussell King case SFP_DEV_UP: 16916b0da5c9SRussell King if (event == SFP_E_DEV_DETACH) 16926b0da5c9SRussell King sfp->sm_dev_state = SFP_DEV_DETACHED; 16936b0da5c9SRussell King else if (event == SFP_E_DEV_DOWN) 1694e85d81a1SRussell King sfp->sm_dev_state = SFP_DEV_DOWN; 1695e85d81a1SRussell King break; 1696e85d81a1SRussell King } 1697e85d81a1SRussell King } 169873970055SRussell King 1699d900954fSRussell King /* This state machine tracks the insert/remove state of the module, probes 1700d900954fSRussell King * the on-board EEPROM, and sets up the power level. 170173970055SRussell King */ 1702e85d81a1SRussell King static void sfp_sm_module(struct sfp *sfp, unsigned int event) 1703e85d81a1SRussell King { 1704b036a554SRussell King int err; 1705b036a554SRussell King 1706b036a554SRussell King /* Handle remove event globally, it resets this state machine */ 1707b036a554SRussell King if (event == SFP_E_REMOVE) { 1708d2e816c0SRussell King if (sfp->sm_mod_state > SFP_MOD_PROBE) 1709d2e816c0SRussell King sfp_sm_mod_remove(sfp); 1710b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); 1711b036a554SRussell King return; 1712b036a554SRussell King } 1713b036a554SRussell King 1714b036a554SRussell King /* Handle device detach globally */ 171573f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN && 171673f5e847SRussell King sfp->sm_mod_state > SFP_MOD_WAITDEV) { 1717b036a554SRussell King if (sfp->module_power_mW > 1000 && 1718b036a554SRussell King sfp->sm_mod_state > SFP_MOD_HPOWER) 1719b036a554SRussell King sfp_sm_mod_hpower(sfp, false); 172073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 1721d2e816c0SRussell King return; 1722d2e816c0SRussell King } 1723d2e816c0SRussell King 172473970055SRussell King switch (sfp->sm_mod_state) { 172573970055SRussell King default: 1726e117be74SRussell King if (event == SFP_E_INSERT) { 1727d900954fSRussell King sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); 1728e117be74SRussell King sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; 1729e117be74SRussell King sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; 1730e117be74SRussell King } 173173970055SRussell King break; 173273970055SRussell King 173373970055SRussell King case SFP_MOD_PROBE: 173473f5e847SRussell King /* Wait for T_PROBE_INIT to time out */ 1735b036a554SRussell King if (event != SFP_E_TIMEOUT) 1736b036a554SRussell King break; 173773970055SRussell King 1738e117be74SRussell King err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); 1739b036a554SRussell King if (err == -EAGAIN) { 1740e117be74SRussell King if (sfp->sm_mod_tries_init && 1741e117be74SRussell King --sfp->sm_mod_tries_init) { 1742e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 1743b036a554SRussell King break; 1744e117be74SRussell King } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { 1745e117be74SRussell King if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) 1746e117be74SRussell King dev_warn(sfp->dev, 1747e117be74SRussell King "please wait, module slow to respond\n"); 1748e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); 1749e117be74SRussell King break; 1750e117be74SRussell King } 1751b036a554SRussell King } 1752b036a554SRussell King if (err < 0) { 1753b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 1754b036a554SRussell King break; 1755b036a554SRussell King } 1756b036a554SRussell King 175773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); 175873f5e847SRussell King /* fall through */ 175973f5e847SRussell King case SFP_MOD_WAITDEV: 176073f5e847SRussell King /* Ensure that the device is attached before proceeding */ 176173f5e847SRussell King if (sfp->sm_dev_state < SFP_DEV_DOWN) 176273f5e847SRussell King break; 176373f5e847SRussell King 176473f5e847SRussell King /* Report the module insertion to the upstream device */ 176573f5e847SRussell King err = sfp_module_insert(sfp->sfp_bus, &sfp->id); 176673f5e847SRussell King if (err < 0) { 176773f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 176873f5e847SRussell King break; 176973f5e847SRussell King } 177073f5e847SRussell King 1771b036a554SRussell King /* If this is a power level 1 module, we are done */ 1772b036a554SRussell King if (sfp->module_power_mW <= 1000) 1773b036a554SRussell King goto insert; 1774b036a554SRussell King 1775b036a554SRussell King sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); 1776b036a554SRussell King /* fall through */ 1777b036a554SRussell King case SFP_MOD_HPOWER: 1778b036a554SRussell King /* Enable high power mode */ 1779b036a554SRussell King err = sfp_sm_mod_hpower(sfp, true); 178073f5e847SRussell King if (err < 0) { 178173f5e847SRussell King if (err != -EAGAIN) { 178273f5e847SRussell King sfp_module_remove(sfp->sfp_bus); 17830936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); 178473f5e847SRussell King } else { 1785e117be74SRussell King sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); 178673f5e847SRussell King } 178773f5e847SRussell King break; 178873f5e847SRussell King } 178973f5e847SRussell King 179073f5e847SRussell King sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); 179173970055SRussell King break; 179273970055SRussell King 1793b036a554SRussell King case SFP_MOD_WAITPWR: 1794b036a554SRussell King /* Wait for T_HPOWER_LEVEL to time out */ 1795b036a554SRussell King if (event != SFP_E_TIMEOUT) 1796b036a554SRussell King break; 1797b036a554SRussell King 1798b036a554SRussell King insert: 17990936ebc4SRussell King sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); 18003bb35261SJon Nettleton break; 1801b036a554SRussell King 180273970055SRussell King case SFP_MOD_PRESENT: 180373970055SRussell King case SFP_MOD_ERROR: 180473970055SRussell King break; 180573970055SRussell King } 1806139d3a21SRussell King 1807139d3a21SRussell King #if IS_ENABLED(CONFIG_HWMON) 1808139d3a21SRussell King if (sfp->sm_mod_state >= SFP_MOD_WAITDEV && 1809139d3a21SRussell King IS_ERR_OR_NULL(sfp->hwmon_dev)) { 1810139d3a21SRussell King err = sfp_hwmon_insert(sfp); 1811139d3a21SRussell King if (err) 1812139d3a21SRussell King dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); 1813139d3a21SRussell King } 1814139d3a21SRussell King #endif 181573970055SRussell King } 181673970055SRussell King 1817e85d81a1SRussell King static void sfp_sm_main(struct sfp *sfp, unsigned int event) 1818e85d81a1SRussell King { 1819eefa6f1fSRussell King unsigned long timeout; 1820eefa6f1fSRussell King 182173970055SRussell King /* Some events are global */ 182273970055SRussell King if (sfp->sm_state != SFP_S_DOWN && 182373970055SRussell King (sfp->sm_mod_state != SFP_MOD_PRESENT || 182473970055SRussell King sfp->sm_dev_state != SFP_DEV_UP)) { 182573970055SRussell King if (sfp->sm_state == SFP_S_LINK_UP && 182673970055SRussell King sfp->sm_dev_state == SFP_DEV_UP) 182773970055SRussell King sfp_sm_link_down(sfp); 182873970055SRussell King if (sfp->mod_phy) 182973970055SRussell King sfp_sm_phy_detach(sfp); 18301539e0d3SRussell King sfp_module_tx_disable(sfp); 1831f3c9a666SRussell King sfp_soft_stop_poll(sfp); 183273970055SRussell King sfp_sm_next(sfp, SFP_S_DOWN, 0); 183373970055SRussell King return; 183473970055SRussell King } 183573970055SRussell King 183673970055SRussell King /* The main state machine */ 183773970055SRussell King switch (sfp->sm_state) { 183873970055SRussell King case SFP_S_DOWN: 1839eefa6f1fSRussell King if (sfp->sm_mod_state != SFP_MOD_PRESENT || 1840eefa6f1fSRussell King sfp->sm_dev_state != SFP_DEV_UP) 1841eefa6f1fSRussell King break; 1842eefa6f1fSRussell King 1843f3c9a666SRussell King if (!(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) 1844f3c9a666SRussell King sfp_soft_start_poll(sfp); 1845f3c9a666SRussell King 1846f3c9a666SRussell King sfp_module_tx_enable(sfp); 1847eefa6f1fSRussell King 1848eefa6f1fSRussell King /* Initialise the fault clearance retries */ 1849eefa6f1fSRussell King sfp->sm_retries = 5; 1850eefa6f1fSRussell King 1851eefa6f1fSRussell King /* We need to check the TX_FAULT state, which is not defined 1852eefa6f1fSRussell King * while TX_DISABLE is asserted. The earliest we want to do 1853eefa6f1fSRussell King * anything (such as probe for a PHY) is 50ms. 1854eefa6f1fSRussell King */ 1855eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); 1856eefa6f1fSRussell King break; 1857eefa6f1fSRussell King 1858eefa6f1fSRussell King case SFP_S_WAIT: 1859eefa6f1fSRussell King if (event != SFP_E_TIMEOUT) 1860eefa6f1fSRussell King break; 1861eefa6f1fSRussell King 1862eefa6f1fSRussell King if (sfp->state & SFP_F_TX_FAULT) { 1863181f29daSRussell King /* Wait t_init before indicating that the link is up, 1864181f29daSRussell King * provided the current state indicates no TX_FAULT. If 1865181f29daSRussell King * TX_FAULT clears before this time, that's fine too. 1866181f29daSRussell King */ 1867eefa6f1fSRussell King timeout = T_INIT_JIFFIES; 1868eefa6f1fSRussell King if (timeout > T_WAIT) 1869eefa6f1fSRussell King timeout -= T_WAIT; 1870eefa6f1fSRussell King else 1871eefa6f1fSRussell King timeout = 1; 1872eefa6f1fSRussell King 1873eefa6f1fSRussell King sfp_sm_next(sfp, SFP_S_INIT, timeout); 1874eefa6f1fSRussell King } else { 1875eefa6f1fSRussell King /* TX_FAULT is not asserted, assume the module has 1876eefa6f1fSRussell King * finished initialising. 1877eefa6f1fSRussell King */ 1878eefa6f1fSRussell King goto init_done; 1879181f29daSRussell King } 188073970055SRussell King break; 188173970055SRussell King 188273970055SRussell King case SFP_S_INIT: 1883d23751a0SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 1884d23751a0SRussell King /* TX_FAULT is still asserted after t_init, so assume 1885d23751a0SRussell King * there is a fault. 1886d23751a0SRussell King */ 1887d23751a0SRussell King sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, 1888d23751a0SRussell King sfp->sm_retries == 5); 1889d23751a0SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 1890d23751a0SRussell King init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT 1891d23751a0SRussell King * clear. Probe for the PHY and check the LOS state. 1892d23751a0SRussell King */ 1893d23751a0SRussell King sfp_sm_probe_for_phy(sfp); 1894d23751a0SRussell King sfp_sm_link_check_los(sfp); 1895d23751a0SRussell King 1896d23751a0SRussell King /* Reset the fault retry count */ 1897d23751a0SRussell King sfp->sm_retries = 5; 1898d23751a0SRussell King } 1899d23751a0SRussell King break; 1900d23751a0SRussell King 1901d23751a0SRussell King case SFP_S_INIT_TX_FAULT: 1902d23751a0SRussell King if (event == SFP_E_TIMEOUT) { 1903d23751a0SRussell King sfp_module_tx_fault_reset(sfp); 1904d23751a0SRussell King sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); 1905d23751a0SRussell King } 190673970055SRussell King break; 190773970055SRussell King 190873970055SRussell King case SFP_S_WAIT_LOS: 190973970055SRussell King if (event == SFP_E_TX_FAULT) 191063ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1911710dfbb0SRussell King else if (sfp_los_event_inactive(sfp, event)) 191273970055SRussell King sfp_sm_link_up(sfp); 191373970055SRussell King break; 191473970055SRussell King 191573970055SRussell King case SFP_S_LINK_UP: 191673970055SRussell King if (event == SFP_E_TX_FAULT) { 191773970055SRussell King sfp_sm_link_down(sfp); 191863ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); 1919710dfbb0SRussell King } else if (sfp_los_event_active(sfp, event)) { 192073970055SRussell King sfp_sm_link_down(sfp); 192173970055SRussell King sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); 192273970055SRussell King } 192373970055SRussell King break; 192473970055SRussell King 192573970055SRussell King case SFP_S_TX_FAULT: 192673970055SRussell King if (event == SFP_E_TIMEOUT) { 192773970055SRussell King sfp_module_tx_fault_reset(sfp); 192873970055SRussell King sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES); 192973970055SRussell King } 193073970055SRussell King break; 193173970055SRussell King 193273970055SRussell King case SFP_S_REINIT: 193373970055SRussell King if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { 193463ec1c7cSRussell King sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); 193573970055SRussell King } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { 193673970055SRussell King dev_info(sfp->dev, "module transmit fault recovered\n"); 193773970055SRussell King sfp_sm_link_check_los(sfp); 193873970055SRussell King } 193973970055SRussell King break; 194073970055SRussell King 194173970055SRussell King case SFP_S_TX_DISABLE: 194273970055SRussell King break; 194373970055SRussell King } 1944e85d81a1SRussell King } 1945e85d81a1SRussell King 1946e85d81a1SRussell King static void sfp_sm_event(struct sfp *sfp, unsigned int event) 1947e85d81a1SRussell King { 1948e85d81a1SRussell King mutex_lock(&sfp->sm_mutex); 1949e85d81a1SRussell King 1950e85d81a1SRussell King dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", 1951e85d81a1SRussell King mod_state_to_str(sfp->sm_mod_state), 1952e85d81a1SRussell King dev_state_to_str(sfp->sm_dev_state), 1953e85d81a1SRussell King sm_state_to_str(sfp->sm_state), 1954e85d81a1SRussell King event_to_str(event)); 1955e85d81a1SRussell King 1956e85d81a1SRussell King sfp_sm_device(sfp, event); 19576b0da5c9SRussell King sfp_sm_module(sfp, event); 1958e85d81a1SRussell King sfp_sm_main(sfp, event); 195973970055SRussell King 19604005a7cbSAndrew Lunn dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", 19614005a7cbSAndrew Lunn mod_state_to_str(sfp->sm_mod_state), 19624005a7cbSAndrew Lunn dev_state_to_str(sfp->sm_dev_state), 19634005a7cbSAndrew Lunn sm_state_to_str(sfp->sm_state)); 196473970055SRussell King 196573970055SRussell King mutex_unlock(&sfp->sm_mutex); 196673970055SRussell King } 196773970055SRussell King 1968b5bfc21aSRussell King static void sfp_attach(struct sfp *sfp) 1969b5bfc21aSRussell King { 19706b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_ATTACH); 1971b5bfc21aSRussell King } 1972b5bfc21aSRussell King 1973b5bfc21aSRussell King static void sfp_detach(struct sfp *sfp) 1974b5bfc21aSRussell King { 19756b0da5c9SRussell King sfp_sm_event(sfp, SFP_E_DEV_DETACH); 1976b5bfc21aSRussell King } 1977b5bfc21aSRussell King 197873970055SRussell King static void sfp_start(struct sfp *sfp) 197973970055SRussell King { 198073970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_UP); 198173970055SRussell King } 198273970055SRussell King 198373970055SRussell King static void sfp_stop(struct sfp *sfp) 198473970055SRussell King { 198573970055SRussell King sfp_sm_event(sfp, SFP_E_DEV_DOWN); 198673970055SRussell King } 198773970055SRussell King 198873970055SRussell King static int sfp_module_info(struct sfp *sfp, struct ethtool_modinfo *modinfo) 198973970055SRussell King { 199073970055SRussell King /* locking... and check module is present */ 199173970055SRussell King 1992ec7681bdSRussell King if (sfp->id.ext.sff8472_compliance && 1993ec7681bdSRussell King !(sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE)) { 199473970055SRussell King modinfo->type = ETH_MODULE_SFF_8472; 199573970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN; 199673970055SRussell King } else { 199773970055SRussell King modinfo->type = ETH_MODULE_SFF_8079; 199873970055SRussell King modinfo->eeprom_len = ETH_MODULE_SFF_8079_LEN; 199973970055SRussell King } 200073970055SRussell King return 0; 200173970055SRussell King } 200273970055SRussell King 200373970055SRussell King static int sfp_module_eeprom(struct sfp *sfp, struct ethtool_eeprom *ee, 200473970055SRussell King u8 *data) 200573970055SRussell King { 200673970055SRussell King unsigned int first, last, len; 200773970055SRussell King int ret; 200873970055SRussell King 200973970055SRussell King if (ee->len == 0) 201073970055SRussell King return -EINVAL; 201173970055SRussell King 201273970055SRussell King first = ee->offset; 201373970055SRussell King last = ee->offset + ee->len; 201473970055SRussell King if (first < ETH_MODULE_SFF_8079_LEN) { 201573970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8079_LEN); 201673970055SRussell King len -= first; 201773970055SRussell King 20182794ffc4SRussell King ret = sfp_read(sfp, false, first, data, len); 201973970055SRussell King if (ret < 0) 202073970055SRussell King return ret; 202173970055SRussell King 202273970055SRussell King first += len; 202373970055SRussell King data += len; 202473970055SRussell King } 20252794ffc4SRussell King if (first < ETH_MODULE_SFF_8472_LEN && last > ETH_MODULE_SFF_8079_LEN) { 202673970055SRussell King len = min_t(unsigned int, last, ETH_MODULE_SFF_8472_LEN); 202773970055SRussell King len -= first; 202873970055SRussell King first -= ETH_MODULE_SFF_8079_LEN; 202973970055SRussell King 20302794ffc4SRussell King ret = sfp_read(sfp, true, first, data, len); 203173970055SRussell King if (ret < 0) 203273970055SRussell King return ret; 203373970055SRussell King } 203473970055SRussell King return 0; 203573970055SRussell King } 203673970055SRussell King 203773970055SRussell King static const struct sfp_socket_ops sfp_module_ops = { 2038b5bfc21aSRussell King .attach = sfp_attach, 2039b5bfc21aSRussell King .detach = sfp_detach, 204073970055SRussell King .start = sfp_start, 204173970055SRussell King .stop = sfp_stop, 204273970055SRussell King .module_info = sfp_module_info, 204373970055SRussell King .module_eeprom = sfp_module_eeprom, 204473970055SRussell King }; 204573970055SRussell King 204673970055SRussell King static void sfp_timeout(struct work_struct *work) 204773970055SRussell King { 204873970055SRussell King struct sfp *sfp = container_of(work, struct sfp, timeout.work); 204973970055SRussell King 205073970055SRussell King rtnl_lock(); 205173970055SRussell King sfp_sm_event(sfp, SFP_E_TIMEOUT); 205273970055SRussell King rtnl_unlock(); 205373970055SRussell King } 205473970055SRussell King 205573970055SRussell King static void sfp_check_state(struct sfp *sfp) 205673970055SRussell King { 205773970055SRussell King unsigned int state, i, changed; 205873970055SRussell King 20592158e856SRobert Hancock mutex_lock(&sfp->st_mutex); 206073970055SRussell King state = sfp_get_state(sfp); 206173970055SRussell King changed = state ^ sfp->state; 206273970055SRussell King changed &= SFP_F_PRESENT | SFP_F_LOS | SFP_F_TX_FAULT; 206373970055SRussell King 206473970055SRussell King for (i = 0; i < GPIO_MAX; i++) 206573970055SRussell King if (changed & BIT(i)) 206673970055SRussell King dev_dbg(sfp->dev, "%s %u -> %u\n", gpio_of_names[i], 206773970055SRussell King !!(sfp->state & BIT(i)), !!(state & BIT(i))); 206873970055SRussell King 206973970055SRussell King state |= sfp->state & (SFP_F_TX_DISABLE | SFP_F_RATE_SELECT); 207073970055SRussell King sfp->state = state; 207173970055SRussell King 207273970055SRussell King rtnl_lock(); 207373970055SRussell King if (changed & SFP_F_PRESENT) 207473970055SRussell King sfp_sm_event(sfp, state & SFP_F_PRESENT ? 207573970055SRussell King SFP_E_INSERT : SFP_E_REMOVE); 207673970055SRussell King 207773970055SRussell King if (changed & SFP_F_TX_FAULT) 207873970055SRussell King sfp_sm_event(sfp, state & SFP_F_TX_FAULT ? 207973970055SRussell King SFP_E_TX_FAULT : SFP_E_TX_CLEAR); 208073970055SRussell King 208173970055SRussell King if (changed & SFP_F_LOS) 208273970055SRussell King sfp_sm_event(sfp, state & SFP_F_LOS ? 208373970055SRussell King SFP_E_LOS_HIGH : SFP_E_LOS_LOW); 208473970055SRussell King rtnl_unlock(); 20852158e856SRobert Hancock mutex_unlock(&sfp->st_mutex); 208673970055SRussell King } 208773970055SRussell King 208873970055SRussell King static irqreturn_t sfp_irq(int irq, void *data) 208973970055SRussell King { 209073970055SRussell King struct sfp *sfp = data; 209173970055SRussell King 209273970055SRussell King sfp_check_state(sfp); 209373970055SRussell King 209473970055SRussell King return IRQ_HANDLED; 209573970055SRussell King } 209673970055SRussell King 209773970055SRussell King static void sfp_poll(struct work_struct *work) 209873970055SRussell King { 209973970055SRussell King struct sfp *sfp = container_of(work, struct sfp, poll.work); 210073970055SRussell King 210173970055SRussell King sfp_check_state(sfp); 2102f3c9a666SRussell King 2103f3c9a666SRussell King if (sfp->state_soft_mask & (SFP_F_LOS | SFP_F_TX_FAULT) || 2104f3c9a666SRussell King sfp->need_poll) 210573970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 210673970055SRussell King } 210773970055SRussell King 210873970055SRussell King static struct sfp *sfp_alloc(struct device *dev) 210973970055SRussell King { 211073970055SRussell King struct sfp *sfp; 211173970055SRussell King 211273970055SRussell King sfp = kzalloc(sizeof(*sfp), GFP_KERNEL); 211373970055SRussell King if (!sfp) 211473970055SRussell King return ERR_PTR(-ENOMEM); 211573970055SRussell King 211673970055SRussell King sfp->dev = dev; 211773970055SRussell King 211873970055SRussell King mutex_init(&sfp->sm_mutex); 21192158e856SRobert Hancock mutex_init(&sfp->st_mutex); 212073970055SRussell King INIT_DELAYED_WORK(&sfp->poll, sfp_poll); 212173970055SRussell King INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); 212273970055SRussell King 2123139d3a21SRussell King sfp_hwmon_init(sfp); 2124139d3a21SRussell King 212573970055SRussell King return sfp; 212673970055SRussell King } 212773970055SRussell King 212873970055SRussell King static void sfp_cleanup(void *data) 212973970055SRussell King { 213073970055SRussell King struct sfp *sfp = data; 213173970055SRussell King 2132139d3a21SRussell King sfp_hwmon_exit(sfp); 2133139d3a21SRussell King 213473970055SRussell King cancel_delayed_work_sync(&sfp->poll); 213573970055SRussell King cancel_delayed_work_sync(&sfp->timeout); 213673970055SRussell King if (sfp->i2c_mii) { 213773970055SRussell King mdiobus_unregister(sfp->i2c_mii); 213873970055SRussell King mdiobus_free(sfp->i2c_mii); 213973970055SRussell King } 214073970055SRussell King if (sfp->i2c) 214173970055SRussell King i2c_put_adapter(sfp->i2c); 214273970055SRussell King kfree(sfp); 214373970055SRussell King } 214473970055SRussell King 214573970055SRussell King static int sfp_probe(struct platform_device *pdev) 214673970055SRussell King { 2147259c8618SRussell King const struct sff_data *sff; 21487ce236faSRuslan Babayev struct i2c_adapter *i2c; 214973970055SRussell King struct sfp *sfp; 2150257c2559SRobert Hancock int err, i; 215173970055SRussell King 215273970055SRussell King sfp = sfp_alloc(&pdev->dev); 215373970055SRussell King if (IS_ERR(sfp)) 215473970055SRussell King return PTR_ERR(sfp); 215573970055SRussell King 215673970055SRussell King platform_set_drvdata(pdev, sfp); 215773970055SRussell King 215873970055SRussell King err = devm_add_action(sfp->dev, sfp_cleanup, sfp); 215973970055SRussell King if (err < 0) 216073970055SRussell King return err; 216173970055SRussell King 2162259c8618SRussell King sff = sfp->type = &sfp_data; 2163259c8618SRussell King 216473970055SRussell King if (pdev->dev.of_node) { 216573970055SRussell King struct device_node *node = pdev->dev.of_node; 2166259c8618SRussell King const struct of_device_id *id; 216773970055SRussell King struct device_node *np; 216873970055SRussell King 2169259c8618SRussell King id = of_match_node(sfp_of_match, node); 2170259c8618SRussell King if (WARN_ON(!id)) 2171259c8618SRussell King return -EINVAL; 2172259c8618SRussell King 2173259c8618SRussell King sff = sfp->type = id->data; 2174259c8618SRussell King 217573970055SRussell King np = of_parse_phandle(node, "i2c-bus", 0); 217666ede1f9SAntoine Tenart if (!np) { 217766ede1f9SAntoine Tenart dev_err(sfp->dev, "missing 'i2c-bus' property\n"); 217866ede1f9SAntoine Tenart return -ENODEV; 217966ede1f9SAntoine Tenart } 218073970055SRussell King 218173970055SRussell King i2c = of_find_i2c_adapter_by_node(np); 218273970055SRussell King of_node_put(np); 21837ce236faSRuslan Babayev } else if (has_acpi_companion(&pdev->dev)) { 21847ce236faSRuslan Babayev struct acpi_device *adev = ACPI_COMPANION(&pdev->dev); 21857ce236faSRuslan Babayev struct fwnode_handle *fw = acpi_fwnode_handle(adev); 21867ce236faSRuslan Babayev struct fwnode_reference_args args; 21877ce236faSRuslan Babayev struct acpi_handle *acpi_handle; 21887ce236faSRuslan Babayev int ret; 21897ce236faSRuslan Babayev 21907ce236faSRuslan Babayev ret = acpi_node_get_property_reference(fw, "i2c-bus", 0, &args); 21911086ca3aSDan Carpenter if (ret || !is_acpi_device_node(args.fwnode)) { 21927ce236faSRuslan Babayev dev_err(&pdev->dev, "missing 'i2c-bus' property\n"); 21937ce236faSRuslan Babayev return -ENODEV; 21947ce236faSRuslan Babayev } 21957ce236faSRuslan Babayev 21967ce236faSRuslan Babayev acpi_handle = ACPI_HANDLE_FWNODE(args.fwnode); 21977ce236faSRuslan Babayev i2c = i2c_acpi_find_adapter_by_handle(acpi_handle); 21987ce236faSRuslan Babayev } else { 21997ce236faSRuslan Babayev return -EINVAL; 22007ce236faSRuslan Babayev } 22017ce236faSRuslan Babayev 220273970055SRussell King if (!i2c) 220373970055SRussell King return -EPROBE_DEFER; 220473970055SRussell King 220573970055SRussell King err = sfp_i2c_configure(sfp, i2c); 220673970055SRussell King if (err < 0) { 220773970055SRussell King i2c_put_adapter(i2c); 220873970055SRussell King return err; 220973970055SRussell King } 221073970055SRussell King 2211259c8618SRussell King for (i = 0; i < GPIO_MAX; i++) 2212259c8618SRussell King if (sff->gpios & BIT(i)) { 221373970055SRussell King sfp->gpio[i] = devm_gpiod_get_optional(sfp->dev, 221473970055SRussell King gpio_of_names[i], gpio_flags[i]); 221573970055SRussell King if (IS_ERR(sfp->gpio[i])) 221673970055SRussell King return PTR_ERR(sfp->gpio[i]); 221773970055SRussell King } 221873970055SRussell King 221973970055SRussell King sfp->get_state = sfp_gpio_get_state; 222073970055SRussell King sfp->set_state = sfp_gpio_set_state; 2221259c8618SRussell King 2222259c8618SRussell King /* Modules that have no detect signal are always present */ 2223259c8618SRussell King if (!(sfp->gpio[GPIO_MODDEF0])) 2224259c8618SRussell King sfp->get_state = sff_gpio_get_state; 222573970055SRussell King 22263bb35261SJon Nettleton device_property_read_u32(&pdev->dev, "maximum-power-milliwatt", 22273bb35261SJon Nettleton &sfp->max_power_mW); 22283bb35261SJon Nettleton if (!sfp->max_power_mW) 22293bb35261SJon Nettleton sfp->max_power_mW = 1000; 22303bb35261SJon Nettleton 22313bb35261SJon Nettleton dev_info(sfp->dev, "Host maximum power %u.%uW\n", 22323bb35261SJon Nettleton sfp->max_power_mW / 1000, (sfp->max_power_mW / 100) % 10); 22333bb35261SJon Nettleton 223473970055SRussell King /* Get the initial state, and always signal TX disable, 223573970055SRussell King * since the network interface will not be up. 223673970055SRussell King */ 223773970055SRussell King sfp->state = sfp_get_state(sfp) | SFP_F_TX_DISABLE; 223873970055SRussell King 223973970055SRussell King if (sfp->gpio[GPIO_RATE_SELECT] && 224073970055SRussell King gpiod_get_value_cansleep(sfp->gpio[GPIO_RATE_SELECT])) 224173970055SRussell King sfp->state |= SFP_F_RATE_SELECT; 224273970055SRussell King sfp_set_state(sfp, sfp->state); 224373970055SRussell King sfp_module_tx_disable(sfp); 224473f5e847SRussell King if (sfp->state & SFP_F_PRESENT) { 224573f5e847SRussell King rtnl_lock(); 224673f5e847SRussell King sfp_sm_event(sfp, SFP_E_INSERT); 224773f5e847SRussell King rtnl_unlock(); 224873f5e847SRussell King } 224973970055SRussell King 225073970055SRussell King for (i = 0; i < GPIO_MAX; i++) { 225173970055SRussell King if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) 225273970055SRussell King continue; 225373970055SRussell King 2254257c2559SRobert Hancock sfp->gpio_irq[i] = gpiod_to_irq(sfp->gpio[i]); 2255257c2559SRobert Hancock if (!sfp->gpio_irq[i]) { 2256f3c9a666SRussell King sfp->need_poll = true; 225773970055SRussell King continue; 225873970055SRussell King } 225973970055SRussell King 2260257c2559SRobert Hancock err = devm_request_threaded_irq(sfp->dev, sfp->gpio_irq[i], 2261257c2559SRobert Hancock NULL, sfp_irq, 226273970055SRussell King IRQF_ONESHOT | 226373970055SRussell King IRQF_TRIGGER_RISING | 226473970055SRussell King IRQF_TRIGGER_FALLING, 226573970055SRussell King dev_name(sfp->dev), sfp); 2266257c2559SRobert Hancock if (err) { 2267257c2559SRobert Hancock sfp->gpio_irq[i] = 0; 2268f3c9a666SRussell King sfp->need_poll = true; 226973970055SRussell King } 2270257c2559SRobert Hancock } 227173970055SRussell King 2272f3c9a666SRussell King if (sfp->need_poll) 227373970055SRussell King mod_delayed_work(system_wq, &sfp->poll, poll_jiffies); 227473970055SRussell King 2275a1f5d1f0SAntoine Tenart /* We could have an issue in cases no Tx disable pin is available or 2276a1f5d1f0SAntoine Tenart * wired as modules using a laser as their light source will continue to 2277a1f5d1f0SAntoine Tenart * be active when the fiber is removed. This could be a safety issue and 2278a1f5d1f0SAntoine Tenart * we should at least warn the user about that. 2279a1f5d1f0SAntoine Tenart */ 2280a1f5d1f0SAntoine Tenart if (!sfp->gpio[GPIO_TX_DISABLE]) 2281a1f5d1f0SAntoine Tenart dev_warn(sfp->dev, 2282a1f5d1f0SAntoine Tenart "No tx_disable pin: SFP modules will always be emitting.\n"); 2283a1f5d1f0SAntoine Tenart 2284b5bfc21aSRussell King sfp->sfp_bus = sfp_register_socket(sfp->dev, sfp, &sfp_module_ops); 2285b5bfc21aSRussell King if (!sfp->sfp_bus) 2286b5bfc21aSRussell King return -ENOMEM; 2287b5bfc21aSRussell King 228873970055SRussell King return 0; 228973970055SRussell King } 229073970055SRussell King 229173970055SRussell King static int sfp_remove(struct platform_device *pdev) 229273970055SRussell King { 229373970055SRussell King struct sfp *sfp = platform_get_drvdata(pdev); 229473970055SRussell King 229573970055SRussell King sfp_unregister_socket(sfp->sfp_bus); 229673970055SRussell King 22970cb96b57SRussell King rtnl_lock(); 22980cb96b57SRussell King sfp_sm_event(sfp, SFP_E_REMOVE); 22990cb96b57SRussell King rtnl_unlock(); 23000cb96b57SRussell King 230173970055SRussell King return 0; 230273970055SRussell King } 230373970055SRussell King 2304257c2559SRobert Hancock static void sfp_shutdown(struct platform_device *pdev) 2305257c2559SRobert Hancock { 2306257c2559SRobert Hancock struct sfp *sfp = platform_get_drvdata(pdev); 2307257c2559SRobert Hancock int i; 2308257c2559SRobert Hancock 2309257c2559SRobert Hancock for (i = 0; i < GPIO_MAX; i++) { 2310257c2559SRobert Hancock if (!sfp->gpio_irq[i]) 2311257c2559SRobert Hancock continue; 2312257c2559SRobert Hancock 2313257c2559SRobert Hancock devm_free_irq(sfp->dev, sfp->gpio_irq[i], sfp); 2314257c2559SRobert Hancock } 2315257c2559SRobert Hancock 2316257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->poll); 2317257c2559SRobert Hancock cancel_delayed_work_sync(&sfp->timeout); 2318257c2559SRobert Hancock } 2319257c2559SRobert Hancock 232073970055SRussell King static struct platform_driver sfp_driver = { 232173970055SRussell King .probe = sfp_probe, 232273970055SRussell King .remove = sfp_remove, 2323257c2559SRobert Hancock .shutdown = sfp_shutdown, 232473970055SRussell King .driver = { 232573970055SRussell King .name = "sfp", 232673970055SRussell King .of_match_table = sfp_of_match, 232773970055SRussell King }, 232873970055SRussell King }; 232973970055SRussell King 233073970055SRussell King static int sfp_init(void) 233173970055SRussell King { 233273970055SRussell King poll_jiffies = msecs_to_jiffies(100); 233373970055SRussell King 233473970055SRussell King return platform_driver_register(&sfp_driver); 233573970055SRussell King } 233673970055SRussell King module_init(sfp_init); 233773970055SRussell King 233873970055SRussell King static void sfp_exit(void) 233973970055SRussell King { 234073970055SRussell King platform_driver_unregister(&sfp_driver); 234173970055SRussell King } 234273970055SRussell King module_exit(sfp_exit); 234373970055SRussell King 234473970055SRussell King MODULE_ALIAS("platform:sfp"); 234573970055SRussell King MODULE_AUTHOR("Russell King"); 234673970055SRussell King MODULE_LICENSE("GPL v2"); 2347