diff options
| -rw-r--r-- | drivers/net/phy/sfp.c | 526 |
1 files changed, 369 insertions, 157 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 272d5773573e..f9b8051c4247 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -36,6 +36,8 @@ enum { SFP_E_INSERT = 0, SFP_E_REMOVE, + SFP_E_DEV_ATTACH, + SFP_E_DEV_DETACH, SFP_E_DEV_DOWN, SFP_E_DEV_UP, SFP_E_TX_FAULT, @@ -45,16 +47,21 @@ enum { SFP_E_TIMEOUT, SFP_MOD_EMPTY = 0, + SFP_MOD_ERROR, SFP_MOD_PROBE, + SFP_MOD_WAITDEV, SFP_MOD_HPOWER, + SFP_MOD_WAITPWR, SFP_MOD_PRESENT, - SFP_MOD_ERROR, - SFP_DEV_DOWN = 0, + SFP_DEV_DETACHED = 0, + SFP_DEV_DOWN, SFP_DEV_UP, SFP_S_DOWN = 0, + SFP_S_WAIT, SFP_S_INIT, + SFP_S_INIT_TX_FAULT, SFP_S_WAIT_LOS, SFP_S_LINK_UP, SFP_S_TX_FAULT, @@ -64,10 +71,12 @@ enum { static const char * const mod_state_strings[] = { [SFP_MOD_EMPTY] = "empty", + [SFP_MOD_ERROR] = "error", [SFP_MOD_PROBE] = "probe", + [SFP_MOD_WAITDEV] = "waitdev", [SFP_MOD_HPOWER] = "hpower", + [SFP_MOD_WAITPWR] = "waitpwr", [SFP_MOD_PRESENT] = "present", - [SFP_MOD_ERROR] = "error", }; static const char *mod_state_to_str(unsigned short mod_state) @@ -78,6 +87,7 @@ static const char *mod_state_to_str(unsigned short mod_state) } static const char * const dev_state_strings[] = { + [SFP_DEV_DETACHED] = "detached", [SFP_DEV_DOWN] = "down", [SFP_DEV_UP] = "up", }; @@ -92,6 +102,8 @@ static const char *dev_state_to_str(unsigned short dev_state) static const char * const event_strings[] = { [SFP_E_INSERT] = "insert", [SFP_E_REMOVE] = "remove", + [SFP_E_DEV_ATTACH] = "dev_attach", + [SFP_E_DEV_DETACH] = "dev_detach", [SFP_E_DEV_DOWN] = "dev_down", [SFP_E_DEV_UP] = "dev_up", [SFP_E_TX_FAULT] = "tx_fault", @@ -110,7 +122,9 @@ static const char *event_to_str(unsigned short event) static const char * const sm_state_strings[] = { [SFP_S_DOWN] = "down", + [SFP_S_WAIT] = "wait", [SFP_S_INIT] = "init", + [SFP_S_INIT_TX_FAULT] = "init_tx_fault", [SFP_S_WAIT_LOS] = "wait_los", [SFP_S_LINK_UP] = "link_up", [SFP_S_TX_FAULT] = "tx_fault", @@ -141,6 +155,7 @@ static const enum gpiod_flags gpio_flags[] = { GPIOD_ASIS, }; +#define T_WAIT msecs_to_jiffies(50) #define T_INIT_JIFFIES msecs_to_jiffies(300) #define T_RESET_US 10 #define T_FAULT_RECOVER msecs_to_jiffies(1000) @@ -149,22 +164,21 @@ static const enum gpiod_flags gpio_flags[] = { * the same length on the PCB, which means it's possible for MOD DEF 0 to * connect before the I2C bus on MOD DEF 1/2. * - * The SFP MSA specifies 300ms as t_init (the time taken for TX_FAULT to - * be deasserted) but makes no mention of the earliest time before we can - * access the I2C EEPROM. However, Avago modules require 300ms. + * The SFF-8472 specifies t_serial ("Time from power on until module is + * ready for data transmission over the two wire serial bus.") as 300ms. */ -#define T_PROBE_INIT msecs_to_jiffies(300) -#define T_HPOWER_LEVEL msecs_to_jiffies(300) -#define T_PROBE_RETRY msecs_to_jiffies(100) +#define T_SERIAL msecs_to_jiffies(300) +#define T_HPOWER_LEVEL msecs_to_jiffies(300) +#define T_PROBE_RETRY_INIT msecs_to_jiffies(100) +#define R_PROBE_RETRY_INIT 10 +#define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) +#define R_PROBE_RETRY_SLOW 12 /* SFP modules appear to always have their PHY configured for bus address * 0x56 (which with mdio-i2c, translates to a PHY address of 22). */ #define SFP_PHY_ADDR 22 -/* Give this long for the PHY to reset. */ -#define T_PHY_RESET_MS 50 - struct sff_data { unsigned int gpios; bool (*module_supported)(const struct sfp_eeprom_id *id); @@ -187,20 +201,25 @@ struct sfp { struct gpio_desc *gpio[GPIO_MAX]; int gpio_irq[GPIO_MAX]; - bool attached; struct mutex st_mutex; /* Protects state */ unsigned int state; struct delayed_work poll; struct delayed_work timeout; struct mutex sm_mutex; /* Protects state machine */ unsigned char sm_mod_state; + unsigned char sm_mod_tries_init; + unsigned char sm_mod_tries; unsigned char sm_dev_state; unsigned short sm_state; unsigned int sm_retries; struct sfp_eeprom_id id; + unsigned int module_power_mW; + #if IS_ENABLED(CONFIG_HWMON) struct sfp_diag diag; + struct delayed_work hwmon_probe; + unsigned int hwmon_tries; struct device *hwmon_dev; char *hwmon_name; #endif @@ -1142,29 +1161,27 @@ static const struct hwmon_chip_info sfp_hwmon_chip_info = { .info = sfp_hwmon_info, }; -static int sfp_hwmon_insert(struct sfp *sfp) +static void sfp_hwmon_probe(struct work_struct *work) { + struct sfp *sfp = container_of(work, struct sfp, hwmon_probe.work); int err, i; - if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) - return 0; - - if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) - return 0; - - if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) - /* This driver in general does not support address - * change. - */ - return 0; - err = sfp_read(sfp, true, 0, &sfp->diag, sizeof(sfp->diag)); - if (err < 0) - return err; + if (err < 0) { + if (sfp->hwmon_tries--) { + mod_delayed_work(system_wq, &sfp->hwmon_probe, + T_PROBE_RETRY_SLOW); + } else { + dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); + } + return; + } sfp->hwmon_name = kstrdup(dev_name(sfp->dev), GFP_KERNEL); - if (!sfp->hwmon_name) - return -ENODEV; + if (!sfp->hwmon_name) { + dev_err(sfp->dev, "out of memory for hwmon name\n"); + return; + } for (i = 0; sfp->hwmon_name[i]; i++) if (hwmon_is_bad_char(sfp->hwmon_name[i])) @@ -1174,18 +1191,52 @@ static int sfp_hwmon_insert(struct sfp *sfp) sfp->hwmon_name, sfp, &sfp_hwmon_chip_info, NULL); + if (IS_ERR(sfp->hwmon_dev)) + dev_err(sfp->dev, "failed to register hwmon device: %ld\n", + PTR_ERR(sfp->hwmon_dev)); +} + +static int sfp_hwmon_insert(struct sfp *sfp) +{ + if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE) + return 0; + + if (!(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) + return 0; + + if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE) + /* This driver in general does not support address + * change. + */ + return 0; - return PTR_ERR_OR_ZERO(sfp->hwmon_dev); + mod_delayed_work(system_wq, &sfp->hwmon_probe, 1); + sfp->hwmon_tries = R_PROBE_RETRY_SLOW; + + return 0; } static void sfp_hwmon_remove(struct sfp *sfp) { + cancel_delayed_work_sync(&sfp->hwmon_probe); if (!IS_ERR_OR_NULL(sfp->hwmon_dev)) { hwmon_device_unregister(sfp->hwmon_dev); sfp->hwmon_dev = NULL; kfree(sfp->hwmon_name); } } + +static int sfp_hwmon_init(struct sfp *sfp) +{ + INIT_DELAYED_WORK(&sfp->hwmon_probe, sfp_hwmon_probe); + + return 0; +} + +static void sfp_hwmon_exit(struct sfp *sfp) +{ + cancel_delayed_work_sync(&sfp->hwmon_probe); +} #else static int sfp_hwmon_insert(struct sfp *sfp) { @@ -1195,6 +1246,15 @@ static int sfp_hwmon_insert(struct sfp *sfp) static void sfp_hwmon_remove(struct sfp *sfp) { } + +static int sfp_hwmon_init(struct sfp *sfp) +{ + return 0; +} + +static void sfp_hwmon_exit(struct sfp *sfp) +{ +} #endif /* Helpers */ @@ -1245,7 +1305,7 @@ static void sfp_sm_next(struct sfp *sfp, unsigned int state, sfp_sm_set_timer(sfp, timeout); } -static void sfp_sm_ins_next(struct sfp *sfp, unsigned int state, +static void sfp_sm_mod_next(struct sfp *sfp, unsigned int state, unsigned int timeout) { sfp->sm_mod_state = state; @@ -1266,8 +1326,6 @@ static void sfp_sm_probe_phy(struct sfp *sfp) struct phy_device *phy; int err; - msleep(T_PHY_RESET_MS); - phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR); if (phy == ERR_PTR(-ENODEV)) { dev_info(sfp->dev, "no PHY detected\n"); @@ -1335,7 +1393,7 @@ static bool sfp_los_event_inactive(struct sfp *sfp, unsigned int event) event == SFP_E_LOS_LOW); } -static void sfp_sm_fault(struct sfp *sfp, bool warn) +static void sfp_sm_fault(struct sfp *sfp, unsigned int next_state, bool warn) { if (sfp->sm_retries && !--sfp->sm_retries) { dev_err(sfp->dev, @@ -1345,21 +1403,17 @@ static void sfp_sm_fault(struct sfp *sfp, bool warn) if (warn) dev_err(sfp->dev, "module transmit fault indicated\n"); - sfp_sm_next(sfp, SFP_S_TX_FAULT, T_FAULT_RECOVER); + sfp_sm_next(sfp, next_state, T_FAULT_RECOVER); } } static void sfp_sm_mod_init(struct sfp *sfp) { sfp_module_tx_enable(sfp); +} - /* Wait t_init before indicating that the link is up, provided the - * current state indicates no TX_FAULT. If TX_FAULT clears before - * this time, that's fine too. - */ - sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); - sfp->sm_retries = 5; - +static void sfp_sm_probe_for_phy(struct sfp *sfp) +{ /* Setting the serdes link mode is guesswork: there's no * field in the EEPROM which indicates what mode should * be used. @@ -1375,69 +1429,83 @@ static void sfp_sm_mod_init(struct sfp *sfp) sfp_sm_probe_phy(sfp); } -static int sfp_sm_mod_hpower(struct sfp *sfp) +static int sfp_module_parse_power(struct sfp *sfp) { - u32 power; - u8 val; - int err; + u32 power_mW = 1000; - power = 1000; if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_POWER_DECL)) - power = 1500; + power_mW = 1500; if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL)) - power = 2000; - - if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE && - (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) != - SFP_DIAGMON_DDM) { - /* The module appears not to implement bus address 0xa2, - * or requires an address change sequence, so assume that - * the module powers up in the indicated power mode. - */ - if (power > sfp->max_power_mW) { + power_mW = 2000; + + if (power_mW > sfp->max_power_mW) { + /* Module power specification exceeds the allowed maximum. */ + if (sfp->id.ext.sff8472_compliance == + SFP_SFF8472_COMPLIANCE_NONE && + !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) { + /* The module appears not to implement bus address + * 0xa2, so assume that the module powers up in the + * indicated mode. + */ dev_err(sfp->dev, "Host does not support %u.%uW modules\n", - power / 1000, (power / 100) % 10); + power_mW / 1000, (power_mW / 100) % 10); return -EINVAL; + } else { + dev_warn(sfp->dev, + "Host does not support %u.%uW modules, module left in power mode 1\n", + power_mW / 1000, (power_mW / 100) % 10); + return 0; } - return 0; } - if (power > sfp->max_power_mW) { + /* If the module requires a higher power mode, but also requires + * an address change sequence, warn the user that the module may + * not be functional. + */ + if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) { dev_warn(sfp->dev, - "Host does not support %u.%uW modules, module left in power mode 1\n", - power / 1000, (power / 100) % 10); + "Address Change Sequence not supported but module requies %u.%uW, module may not be functional\n", + power_mW / 1000, (power_mW / 100) % 10); return 0; } - if (power <= 1000) - return 0; + sfp->module_power_mW = power_mW; + + return 0; +} + +static int sfp_sm_mod_hpower(struct sfp *sfp, bool enable) +{ + u8 val; + int err; err = sfp_read(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); if (err != sizeof(val)) { dev_err(sfp->dev, "Failed to read EEPROM: %d\n", err); - err = -EAGAIN; - goto err; + return -EAGAIN; } - val |= BIT(0); + if (enable) + val |= BIT(0); + else + val &= ~BIT(0); err = sfp_write(sfp, true, SFP_EXT_STATUS, &val, sizeof(val)); if (err != sizeof(val)) { dev_err(sfp->dev, "Failed to write EEPROM: %d\n", err); - err = -EAGAIN; - goto err; + return -EAGAIN; } - dev_info(sfp->dev, "Module switched to %u.%uW power level\n", - power / 1000, (power / 100) % 10); - return T_HPOWER_LEVEL; + if (enable) + dev_info(sfp->dev, "Module switched to %u.%uW power level\n", + sfp->module_power_mW / 1000, + (sfp->module_power_mW / 100) % 10); -err: - return err; + return 0; } -static int sfp_sm_mod_probe(struct sfp *sfp) +static int sfp_sm_mod_probe(struct sfp *sfp, bool report) { /* SFP module inserted - read I2C data */ struct sfp_eeprom_id id; @@ -1447,7 +1515,8 @@ static int sfp_sm_mod_probe(struct sfp *sfp) ret = sfp_read(sfp, false, 0, &id, sizeof(id)); if (ret < 0) { - dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); + if (report) + dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); return -EAGAIN; } @@ -1517,106 +1586,174 @@ static int sfp_sm_mod_probe(struct sfp *sfp) dev_warn(sfp->dev, "module address swap to access page 0xA2 is not supported.\n"); - ret = sfp_hwmon_insert(sfp); - if (ret < 0) - return ret; - - ret = sfp_module_insert(sfp->sfp_bus, &sfp->id); + /* Parse the module power requirement */ + ret = sfp_module_parse_power(sfp); if (ret < 0) return ret; - return sfp_sm_mod_hpower(sfp); + return 0; } static void sfp_sm_mod_remove(struct sfp *sfp) { - sfp_module_remove(sfp->sfp_bus); + if (sfp->sm_mod_state > SFP_MOD_WAITDEV) + sfp_module_remove(sfp->sfp_bus); sfp_hwmon_remove(sfp); - if (sfp->mod_phy) - sfp_sm_phy_detach(sfp); - - sfp_module_tx_disable(sfp); - memset(&sfp->id, 0, sizeof(sfp->id)); + sfp->module_power_mW = 0; dev_info(sfp->dev, "module removed\n"); } -static void sfp_sm_event(struct sfp *sfp, unsigned int event) +/* This state machine tracks the upstream's state */ +static void sfp_sm_device(struct sfp *sfp, unsigned int event) { - mutex_lock(&sfp->sm_mutex); + switch (sfp->sm_dev_state) { + default: + if (event == SFP_E_DEV_ATTACH) + sfp->sm_dev_state = SFP_DEV_DOWN; + break; - dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", - mod_state_to_str(sfp->sm_mod_state), - dev_state_to_str(sfp->sm_dev_state), - sm_state_to_str(sfp->sm_state), - event_to_str(event)); + case SFP_DEV_DOWN: + if (event == SFP_E_DEV_DETACH) + sfp->sm_dev_state = SFP_DEV_DETACHED; + else if (event == SFP_E_DEV_UP) + sfp->sm_dev_state = SFP_DEV_UP; + break; + + case SFP_DEV_UP: + if (event == SFP_E_DEV_DETACH) + sfp->sm_dev_state = SFP_DEV_DETACHED; + else if (event == SFP_E_DEV_DOWN) + sfp->sm_dev_state = SFP_DEV_DOWN; + break; + } +} + +/* This state machine tracks the insert/remove state of the module, probes + * the on-board EEPROM, and sets up the power level. + */ +static void sfp_sm_module(struct sfp *sfp, unsigned int event) +{ + int err; + + /* Handle remove event globally, it resets this state machine */ + if (event == SFP_E_REMOVE) { + if (sfp->sm_mod_state > SFP_MOD_PROBE) + sfp_sm_mod_remove(sfp); + sfp_sm_mod_next(sfp, SFP_MOD_EMPTY, 0); + return; + } + + /* Handle device detach globally */ + if (sfp->sm_dev_state < SFP_DEV_DOWN && + sfp->sm_mod_state > SFP_MOD_WAITDEV) { + if (sfp->module_power_mW > 1000 && + sfp->sm_mod_state > SFP_MOD_HPOWER) + sfp_sm_mod_hpower(sfp, false); + sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); + return; + } - /* This state machine tracks the insert/remove state of - * the module, and handles probing the on-board EEPROM. - */ switch (sfp->sm_mod_state) { default: - if (event == SFP_E_INSERT && sfp->attached) { - sfp_module_tx_disable(sfp); - sfp_sm_ins_next(sfp, SFP_MOD_PROBE, T_PROBE_INIT); + if (event == SFP_E_INSERT) { + sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); + sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; + sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; } break; case SFP_MOD_PROBE: - if (event == SFP_E_REMOVE) { - sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); - } else if (event == SFP_E_TIMEOUT) { - int val = sfp_sm_mod_probe(sfp); - - if (val == 0) - sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); - else if (val > 0) - sfp_sm_ins_next(sfp, SFP_MOD_HPOWER, val); - else if (val != -EAGAIN) - sfp_sm_ins_next(sfp, SFP_MOD_ERROR, 0); - else - sfp_sm_set_timer(sfp, T_PROBE_RETRY); + /* Wait for T_PROBE_INIT to time out */ + if (event != SFP_E_TIMEOUT) + break; + + err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); + if (err == -EAGAIN) { + if (sfp->sm_mod_tries_init && + --sfp->sm_mod_tries_init) { + sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); + break; + } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { + if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) + dev_warn(sfp->dev, + "please wait, module slow to respond\n"); + sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); + break; + } + } + if (err < 0) { + sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); + break; } - break; - case SFP_MOD_HPOWER: - if (event == SFP_E_TIMEOUT) { - sfp_sm_ins_next(sfp, SFP_MOD_PRESENT, 0); + sfp_sm_mod_next(sfp, SFP_MOD_WAITDEV, 0); + /* fall through */ + case SFP_MOD_WAITDEV: + /* Ensure that the device is attached before proceeding */ + if (sfp->sm_dev_state < SFP_DEV_DOWN) + break; + + /* Report the module insertion to the upstream device */ + err = sfp_module_insert(sfp->sfp_bus, &sfp->id); + if (err < 0) { + sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); break; } - /* fallthrough */ - case SFP_MOD_PRESENT: - case SFP_MOD_ERROR: - if (event == SFP_E_REMOVE) { - sfp_sm_mod_remove(sfp); - sfp_sm_ins_next(sfp, SFP_MOD_EMPTY, 0); + + /* If this is a power level 1 module, we are done */ + if (sfp->module_power_mW <= 1000) + goto insert; + + sfp_sm_mod_next(sfp, SFP_MOD_HPOWER, 0); + /* fall through */ + case SFP_MOD_HPOWER: + /* Enable high power mode */ + err = sfp_sm_mod_hpower(sfp, true); + if (err < 0) { + if (err != -EAGAIN) { + sfp_module_remove(sfp->sfp_bus); + sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); + } else { + sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); + } + break; } + + sfp_sm_mod_next(sfp, SFP_MOD_WAITPWR, T_HPOWER_LEVEL); break; - } - /* This state machine tracks the netdev up/down state */ - switch (sfp->sm_dev_state) { - default: - if (event == SFP_E_DEV_UP) - sfp->sm_dev_state = SFP_DEV_UP; + case SFP_MOD_WAITPWR: + /* Wait for T_HPOWER_LEVEL to time out */ + if (event != SFP_E_TIMEOUT) + break; + + insert: + sfp_sm_mod_next(sfp, SFP_MOD_PRESENT, 0); break; - case SFP_DEV_UP: - if (event == SFP_E_DEV_DOWN) { - /* If the module has a PHY, avoid raising TX disable - * as this resets the PHY. Otherwise, raise it to - * turn the laser off. - */ - if (!sfp->mod_phy) - sfp_module_tx_disable(sfp); - sfp->sm_dev_state = SFP_DEV_DOWN; - } + case SFP_MOD_PRESENT: + case SFP_MOD_ERROR: break; } +#if IS_ENABLED(CONFIG_HWMON) + if (sfp->sm_mod_state >= SFP_MOD_WAITDEV && + IS_ERR_OR_NULL(sfp->hwmon_dev)) { + err = sfp_hwmon_insert(sfp); + if (err) + dev_warn(sfp->dev, "hwmon probe failed: %d\n", err); + } +#endif +} + +static void sfp_sm_main(struct sfp *sfp, unsigned int event) +{ + unsigned long timeout; + /* Some events are global */ if (sfp->sm_state != SFP_S_DOWN && (sfp->sm_mod_state != SFP_MOD_PRESENT || @@ -1626,29 +1763,83 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) sfp_sm_link_down(sfp); if (sfp->mod_phy) sfp_sm_phy_detach(sfp); + sfp_module_tx_disable(sfp); sfp_sm_next(sfp, SFP_S_DOWN, 0); - mutex_unlock(&sfp->sm_mutex); return; } /* The main state machine */ switch (sfp->sm_state) { case SFP_S_DOWN: - if (sfp->sm_mod_state == SFP_MOD_PRESENT && - sfp->sm_dev_state == SFP_DEV_UP) - sfp_sm_mod_init(sfp); + if (sfp->sm_mod_state != SFP_MOD_PRESENT || + sfp->sm_dev_state != SFP_DEV_UP) + break; + + sfp_sm_mod_init(sfp); + + /* Initialise the fault clearance retries */ + sfp->sm_retries = 5; + + /* We need to check the TX_FAULT state, which is not defined + * while TX_DISABLE is asserted. The earliest we want to do + * anything (such as probe for a PHY) is 50ms. + */ + sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); + break; + + case SFP_S_WAIT: + if (event != SFP_E_TIMEOUT) + break; + + if (sfp->state & SFP_F_TX_FAULT) { + /* Wait t_init before indicating that the link is up, + * provided the current state indicates no TX_FAULT. If + * TX_FAULT clears before this time, that's fine too. + */ + timeout = T_INIT_JIFFIES; + if (timeout > T_WAIT) + timeout -= T_WAIT; + else + timeout = 1; + + sfp_sm_next(sfp, SFP_S_INIT, timeout); + } else { + /* TX_FAULT is not asserted, assume the module has + * finished initialising. + */ + goto init_done; + } break; case SFP_S_INIT: - if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) - sfp_sm_fault(sfp, true); - else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) + if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { + /* TX_FAULT is still asserted after t_init, so assume + * there is a fault. + */ + sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, + sfp->sm_retries == 5); + } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { + init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT + * clear. Probe for the PHY and check the LOS state. + */ + sfp_sm_probe_for_phy(sfp); sfp_sm_link_check_los(sfp); + + /* Reset the fault retry count */ + sfp->sm_retries = 5; + } + break; + + case SFP_S_INIT_TX_FAULT: + if (event == SFP_E_TIMEOUT) { + sfp_module_tx_fault_reset(sfp); + sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES); + } break; case SFP_S_WAIT_LOS: if (event == SFP_E_TX_FAULT) - sfp_sm_fault(sfp, true); + sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); else if (sfp_los_event_inactive(sfp, event)) sfp_sm_link_up(sfp); break; @@ -1656,7 +1847,7 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) case SFP_S_LINK_UP: if (event == SFP_E_TX_FAULT) { sfp_sm_link_down(sfp); - sfp_sm_fault(sfp, true); + sfp_sm_fault(sfp, SFP_S_TX_FAULT, true); } else if (sfp_los_event_active(sfp, event)) { sfp_sm_link_down(sfp); sfp_sm_next(sfp, SFP_S_WAIT_LOS, 0); @@ -1672,7 +1863,7 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) case SFP_S_REINIT: if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) { - sfp_sm_fault(sfp, false); + sfp_sm_fault(sfp, SFP_S_TX_FAULT, false); } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { dev_info(sfp->dev, "module transmit fault recovered\n"); sfp_sm_link_check_los(sfp); @@ -1682,6 +1873,21 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) case SFP_S_TX_DISABLE: break; } +} + +static void sfp_sm_event(struct sfp *sfp, unsigned int event) +{ + mutex_lock(&sfp->sm_mutex); + + dev_dbg(sfp->dev, "SM: enter %s:%s:%s event %s\n", + mod_state_to_str(sfp->sm_mod_state), + dev_state_to_str(sfp->sm_dev_state), + sm_state_to_str(sfp->sm_state), + event_to_str(event)); + + sfp_sm_device(sfp, event); + sfp_sm_module(sfp, event); + sfp_sm_main(sfp, event); dev_dbg(sfp->dev, "SM: exit %s:%s:%s\n", mod_state_to_str(sfp->sm_mod_state), @@ -1693,15 +1899,12 @@ static void sfp_sm_event(struct sfp *sfp, unsigned int event) static void sfp_attach(struct sfp *sfp) { - sfp->attached = true; - if (sfp->state & SFP_F_PRESENT) - sfp_sm_event(sfp, SFP_E_INSERT); + sfp_sm_event(sfp, SFP_E_DEV_ATTACH); } static void sfp_detach(struct sfp *sfp) { - sfp->attached = false; - sfp_sm_event(sfp, SFP_E_REMOVE); + sfp_sm_event(sfp, SFP_E_DEV_DETACH); } static void sfp_start(struct sfp *sfp) @@ -1846,6 +2049,8 @@ static struct sfp *sfp_alloc(struct device *dev) INIT_DELAYED_WORK(&sfp->poll, sfp_poll); INIT_DELAYED_WORK(&sfp->timeout, sfp_timeout); + sfp_hwmon_init(sfp); + return sfp; } @@ -1853,6 +2058,8 @@ static void sfp_cleanup(void *data) { struct sfp *sfp = data; + sfp_hwmon_exit(sfp); + cancel_delayed_work_sync(&sfp->poll); cancel_delayed_work_sync(&sfp->timeout); if (sfp->i2c_mii) { @@ -1964,6 +2171,11 @@ static int sfp_probe(struct platform_device *pdev) sfp->state |= SFP_F_RATE_SELECT; sfp_set_state(sfp, sfp->state); sfp_module_tx_disable(sfp); + if (sfp->state & SFP_F_PRESENT) { + rtnl_lock(); + sfp_sm_event(sfp, SFP_E_INSERT); + rtnl_unlock(); + } for (i = 0; i < GPIO_MAX; i++) { if (gpio_flags[i] != GPIOD_IN || !sfp->gpio[i]) |