diff options
Diffstat (limited to 'drivers/net/phy/phy.c')
| -rw-r--r-- | drivers/net/phy/phy.c | 160 |
1 files changed, 119 insertions, 41 deletions
diff --git a/drivers/net/phy/phy.c b/drivers/net/phy/phy.c index f424b867f73e..7cc1b7dcfe05 100644 --- a/drivers/net/phy/phy.c +++ b/drivers/net/phy/phy.c @@ -29,6 +29,7 @@ #include <linux/mii.h> #include <linux/ethtool.h> #include <linux/phy.h> +#include <linux/phy_led_triggers.h> #include <linux/timer.h> #include <linux/workqueue.h> #include <linux/mdio.h> @@ -143,13 +144,14 @@ static int phy_config_interrupt(struct phy_device *phydev, u32 interrupts) * Returns > 0 on success or < 0 on error. 0 means that auto-negotiation * is still pending. */ -static inline int phy_aneg_done(struct phy_device *phydev) +int phy_aneg_done(struct phy_device *phydev) { if (phydev->drv->aneg_done) return phydev->drv->aneg_done(phydev); return genphy_aneg_done(phydev); } +EXPORT_SYMBOL(phy_aneg_done); /* A structure for mapping a particular speed and duplex * combination to a particular SUPPORTED and ADVERTISED value @@ -261,6 +263,41 @@ static inline unsigned int phy_find_valid(unsigned int idx, u32 features) } /** + * phy_supported_speeds - return all speeds currently supported by a phy device + * @phy: The phy device to return supported speeds of. + * @speeds: buffer to store supported speeds in. + * @size: size of speeds buffer. + * + * Description: Returns the number of supported speeds, and fills the speeds + * buffer with the supported speeds. If speeds buffer is too small to contain + * all currently supported speeds, will return as many speeds as can fit. + */ +unsigned int phy_supported_speeds(struct phy_device *phy, + unsigned int *speeds, + unsigned int size) +{ + unsigned int count = 0; + unsigned int idx = 0; + + while (idx < MAX_NUM_SETTINGS && count < size) { + idx = phy_find_valid(idx, phy->supported); + + if (!(settings[idx].setting & phy->supported)) + break; + + /* Assumes settings are grouped by speed */ + if ((count == 0) || + (speeds[count - 1] != settings[idx].speed)) { + speeds[count] = settings[idx].speed; + count++; + } + idx++; + } + + return count; +} + +/** * phy_check_valid - check if there is a valid PHY setting which matches * speed, duplex, and feature mask * @speed: speed to match @@ -353,7 +390,7 @@ int phy_ethtool_sset(struct phy_device *phydev, struct ethtool_cmd *cmd) phydev->duplex = cmd->duplex; - phydev->mdix = cmd->eth_tp_mdix_ctrl; + phydev->mdix_ctrl = cmd->eth_tp_mdix_ctrl; /* Restart the PHY */ phy_start_aneg(phydev); @@ -407,7 +444,7 @@ int phy_ethtool_ksettings_set(struct phy_device *phydev, phydev->duplex = duplex; - phydev->mdix = cmd->base.eth_tp_mdix_ctrl; + phydev->mdix_ctrl = cmd->base.eth_tp_mdix_ctrl; /* Restart the PHY */ phy_start_aneg(phydev); @@ -433,7 +470,8 @@ int phy_ethtool_gset(struct phy_device *phydev, struct ethtool_cmd *cmd) cmd->transceiver = phy_is_internal(phydev) ? XCVR_INTERNAL : XCVR_EXTERNAL; cmd->autoneg = phydev->autoneg; - cmd->eth_tp_mdix_ctrl = phydev->mdix; + cmd->eth_tp_mdix_ctrl = phydev->mdix_ctrl; + cmd->eth_tp_mdix = phydev->mdix; return 0; } @@ -460,7 +498,8 @@ int phy_ethtool_ksettings_get(struct phy_device *phydev, cmd->base.phy_address = phydev->mdio.addr; cmd->base.autoneg = phydev->autoneg; - cmd->base.eth_tp_mdix_ctrl = phydev->mdix; + cmd->base.eth_tp_mdix_ctrl = phydev->mdix_ctrl; + cmd->base.eth_tp_mdix = phydev->mdix; return 0; } @@ -611,14 +650,18 @@ void phy_start_machine(struct phy_device *phydev) * phy_trigger_machine - trigger the state machine to run * * @phydev: the phy_device struct + * @sync: indicate whether we should wait for the workqueue cancelation * * Description: There has been a change in state which requires that the * state machine runs. */ -static void phy_trigger_machine(struct phy_device *phydev) +static void phy_trigger_machine(struct phy_device *phydev, bool sync) { - cancel_delayed_work_sync(&phydev->state_queue); + if (sync) + cancel_delayed_work_sync(&phydev->state_queue); + else + cancel_delayed_work(&phydev->state_queue); queue_delayed_work(system_power_efficient_wq, &phydev->state_queue, 0); } @@ -655,7 +698,7 @@ static void phy_error(struct phy_device *phydev) phydev->state = PHY_HALTED; mutex_unlock(&phydev->lock); - phy_trigger_machine(phydev); + phy_trigger_machine(phydev, false); } /** @@ -664,7 +707,7 @@ static void phy_error(struct phy_device *phydev) * @phy_dat: phy_device pointer * * Description: When a PHY interrupt occurs, the handler disables - * interrupts, and schedules a work task to clear the interrupt. + * interrupts, and uses phy_change to handle the interrupt. */ static irqreturn_t phy_interrupt(int irq, void *phy_dat) { @@ -673,15 +716,10 @@ static irqreturn_t phy_interrupt(int irq, void *phy_dat) if (PHY_HALTED == phydev->state) return IRQ_NONE; /* It can't be ours. */ - /* The MDIO bus is not allowed to be written in interrupt - * context, so we need to disable the irq here. A work - * queue will write the PHY to disable and clear the - * interrupt, and then reenable the irq line. - */ disable_irq_nosync(irq); atomic_inc(&phydev->irq_disable); - queue_work(system_power_efficient_wq, &phydev->phy_queue); + phy_change(phydev); return IRQ_HANDLED; } @@ -739,10 +777,9 @@ phy_err: int phy_start_interrupts(struct phy_device *phydev) { atomic_set(&phydev->irq_disable, 0); - if (request_irq(phydev->irq, phy_interrupt, - IRQF_SHARED, - "phy_interrupt", - phydev) < 0) { + if (request_threaded_irq(phydev->irq, NULL, phy_interrupt, + IRQF_ONESHOT | IRQF_SHARED, + phydev_name(phydev), phydev) < 0) { pr_warn("%s: Can't get IRQ %d (PHY)\n", phydev->mdio.bus->name, phydev->irq); phydev->irq = PHY_POLL; @@ -766,12 +803,6 @@ int phy_stop_interrupts(struct phy_device *phydev) free_irq(phydev->irq, phydev); - /* Cannot call flush_scheduled_work() here as desired because - * of rtnl_lock(), but we do not really care about what would - * be done, except from enable_irq(), so cancel any work - * possibly pending and take care of the matter below. - */ - cancel_work_sync(&phydev->phy_queue); /* If work indeed has been cancelled, disable_irq() will have * been left unbalanced from phy_interrupt() and enable_irq() * has to be called so that other devices on the line work. @@ -784,14 +815,11 @@ int phy_stop_interrupts(struct phy_device *phydev) EXPORT_SYMBOL(phy_stop_interrupts); /** - * phy_change - Scheduled by the phy_interrupt/timer to handle PHY changes - * @work: work_struct that describes the work to be done + * phy_change - Called by the phy_interrupt to handle PHY changes + * @phydev: phy_device struct that interrupted */ -void phy_change(struct work_struct *work) +void phy_change(struct phy_device *phydev) { - struct phy_device *phydev = - container_of(work, struct phy_device, phy_queue); - if (phy_interrupt_is_valid(phydev)) { if (phydev->drv->did_interrupt && !phydev->drv->did_interrupt(phydev)) @@ -817,7 +845,7 @@ void phy_change(struct work_struct *work) } /* reschedule state queue work to run as soon as possible */ - phy_trigger_machine(phydev); + phy_trigger_machine(phydev, true); return; ignore: @@ -833,6 +861,18 @@ phy_err: } /** + * phy_change_work - Scheduled by the phy_mac_interrupt to handle PHY changes + * @work: work_struct that describes the work to be done + */ +void phy_change_work(struct work_struct *work) +{ + struct phy_device *phydev = + container_of(work, struct phy_device, phy_queue); + + phy_change(phydev); +} + +/** * phy_stop - Bring down the PHY link, and stop checking the status * @phydev: target phy_device struct */ @@ -907,10 +947,16 @@ void phy_start(struct phy_device *phydev) if (do_resume) phy_resume(phydev); - phy_trigger_machine(phydev); + phy_trigger_machine(phydev, true); } EXPORT_SYMBOL(phy_start); +static void phy_adjust_link(struct phy_device *phydev) +{ + phydev->adjust_link(phydev->attached_dev); + phy_led_trigger_change_speed(phydev); +} + /** * phy_state_machine - Handle the state machine * @work: work_struct that describes the work to be done @@ -953,7 +999,7 @@ void phy_state_machine(struct work_struct *work) if (!phydev->link) { phydev->state = PHY_NOLINK; netif_carrier_off(phydev->attached_dev); - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); break; } @@ -966,7 +1012,7 @@ void phy_state_machine(struct work_struct *work) if (err > 0) { phydev->state = PHY_RUNNING; netif_carrier_on(phydev->attached_dev); - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); } else if (0 == phydev->link_timeout--) needs_aneg = true; @@ -993,7 +1039,7 @@ void phy_state_machine(struct work_struct *work) } phydev->state = PHY_RUNNING; netif_carrier_on(phydev->attached_dev); - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); } break; case PHY_FORCING: @@ -1009,7 +1055,7 @@ void phy_state_machine(struct work_struct *work) needs_aneg = true; } - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); break; case PHY_RUNNING: /* Only register a CHANGE if we are polling and link changed @@ -1024,6 +1070,15 @@ void phy_state_machine(struct work_struct *work) if (old_link != phydev->link) phydev->state = PHY_CHANGELINK; } + /* + * Failsafe: check that nobody set phydev->link=0 between two + * poll cycles, otherwise we won't leave RUNNING state as long + * as link remains down. + */ + if (!phydev->link && phydev->state == PHY_RUNNING) { + phydev->state = PHY_CHANGELINK; + phydev_err(phydev, "no link in PHY_RUNNING\n"); + } break; case PHY_CHANGELINK: err = phy_read_status(phydev); @@ -1038,7 +1093,7 @@ void phy_state_machine(struct work_struct *work) netif_carrier_off(phydev->attached_dev); } - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); if (phy_interrupt_is_valid(phydev)) err = phy_config_interrupt(phydev, @@ -1048,7 +1103,7 @@ void phy_state_machine(struct work_struct *work) if (phydev->link) { phydev->link = 0; netif_carrier_off(phydev->attached_dev); - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); do_suspend = true; } break; @@ -1072,7 +1127,7 @@ void phy_state_machine(struct work_struct *work) } else { phydev->state = PHY_NOLINK; } - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); } else { phydev->state = PHY_AN; phydev->link_timeout = PHY_AN_TIMEOUT; @@ -1088,7 +1143,7 @@ void phy_state_machine(struct work_struct *work) } else { phydev->state = PHY_NOLINK; } - phydev->adjust_link(phydev->attached_dev); + phy_adjust_link(phydev); } break; } @@ -1116,6 +1171,15 @@ void phy_state_machine(struct work_struct *work) PHY_STATE_TIME * HZ); } +/** + * phy_mac_interrupt - MAC says the link has changed + * @phydev: phy_device struct with changed link + * @new_link: Link is Up/Down. + * + * Description: The MAC layer is able indicate there has been a change + * in the PHY link status. Set the new link status, and trigger the + * state machine, work a work queue. + */ void phy_mac_interrupt(struct phy_device *phydev, int new_link) { phydev->link = new_link; @@ -1348,6 +1412,9 @@ int phy_ethtool_set_eee(struct phy_device *phydev, struct ethtool_eee *data) { int val = ethtool_adv_to_mmd_eee_adv_t(data->advertised); + /* Mask prohibited EEE modes */ + val &= ~phydev->eee_broken_modes; + phy_write_mmd_indirect(phydev, MDIO_AN_EEE_ADV, MDIO_MMD_AN, val); return 0; @@ -1393,3 +1460,14 @@ int phy_ethtool_set_link_ksettings(struct net_device *ndev, return phy_ethtool_ksettings_set(phydev, cmd); } EXPORT_SYMBOL(phy_ethtool_set_link_ksettings); + +int phy_ethtool_nway_reset(struct net_device *ndev) +{ + struct phy_device *phydev = ndev->phydev; + + if (!phydev) + return -ENODEV; + + return genphy_restart_aneg(phydev); +} +EXPORT_SYMBOL(phy_ethtool_nway_reset); |