diff options
Diffstat (limited to 'drivers/net/phy/phy_device.c')
| -rw-r--r-- | drivers/net/phy/phy_device.c | 248 |
1 files changed, 246 insertions, 2 deletions
diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index ac2784192472..83fc8e1b5793 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1082,8 +1082,12 @@ int phy_init_hw(struct phy_device *phydev) if (!phydev->drv) return 0; - if (phydev->drv->soft_reset) + if (phydev->drv->soft_reset) { ret = phydev->drv->soft_reset(phydev); + /* see comment in genphy_soft_reset for an explanation */ + if (!ret) + phydev->suspended = 0; + } if (ret < 0) return ret; @@ -1458,6 +1462,144 @@ bool phy_driver_is_genphy_10g(struct phy_device *phydev) EXPORT_SYMBOL_GPL(phy_driver_is_genphy_10g); /** + * phy_package_join - join a common PHY group + * @phydev: target phy_device struct + * @addr: cookie and PHY address for global register access + * @priv_size: if non-zero allocate this amount of bytes for private data + * + * This joins a PHY group and provides a shared storage for all phydevs in + * this group. This is intended to be used for packages which contain + * more than one PHY, for example a quad PHY transceiver. + * + * The addr parameter serves as a cookie which has to have the same value + * for all members of one group and as a PHY address to access generic + * registers of a PHY package. Usually, one of the PHY addresses of the + * different PHYs in the package provides access to these global registers. + * The address which is given here, will be used in the phy_package_read() + * and phy_package_write() convenience functions. If your PHY doesn't have + * global registers you can just pick any of the PHY addresses. + * + * This will set the shared pointer of the phydev to the shared storage. + * If this is the first call for a this cookie the shared storage will be + * allocated. If priv_size is non-zero, the given amount of bytes are + * allocated for the priv member. + * + * Returns < 1 on error, 0 on success. Esp. calling phy_package_join() + * with the same cookie but a different priv_size is an error. + */ +int phy_package_join(struct phy_device *phydev, int addr, size_t priv_size) +{ + struct mii_bus *bus = phydev->mdio.bus; + struct phy_package_shared *shared; + int ret; + + if (addr < 0 || addr >= PHY_MAX_ADDR) + return -EINVAL; + + mutex_lock(&bus->shared_lock); + shared = bus->shared[addr]; + if (!shared) { + ret = -ENOMEM; + shared = kzalloc(sizeof(*shared), GFP_KERNEL); + if (!shared) + goto err_unlock; + if (priv_size) { + shared->priv = kzalloc(priv_size, GFP_KERNEL); + if (!shared->priv) + goto err_free; + shared->priv_size = priv_size; + } + shared->addr = addr; + refcount_set(&shared->refcnt, 1); + bus->shared[addr] = shared; + } else { + ret = -EINVAL; + if (priv_size && priv_size != shared->priv_size) + goto err_unlock; + refcount_inc(&shared->refcnt); + } + mutex_unlock(&bus->shared_lock); + + phydev->shared = shared; + + return 0; + +err_free: + kfree(shared); +err_unlock: + mutex_unlock(&bus->shared_lock); + return ret; +} +EXPORT_SYMBOL_GPL(phy_package_join); + +/** + * phy_package_leave - leave a common PHY group + * @phydev: target phy_device struct + * + * This leaves a PHY group created by phy_package_join(). If this phydev + * was the last user of the shared data between the group, this data is + * freed. Resets the phydev->shared pointer to NULL. + */ +void phy_package_leave(struct phy_device *phydev) +{ + struct phy_package_shared *shared = phydev->shared; + struct mii_bus *bus = phydev->mdio.bus; + + if (!shared) + return; + + if (refcount_dec_and_mutex_lock(&shared->refcnt, &bus->shared_lock)) { + bus->shared[shared->addr] = NULL; + mutex_unlock(&bus->shared_lock); + kfree(shared->priv); + kfree(shared); + } + + phydev->shared = NULL; +} +EXPORT_SYMBOL_GPL(phy_package_leave); + +static void devm_phy_package_leave(struct device *dev, void *res) +{ + phy_package_leave(*(struct phy_device **)res); +} + +/** + * devm_phy_package_join - resource managed phy_package_join() + * @dev: device that is registering this PHY package + * @phydev: target phy_device struct + * @addr: cookie and PHY address for global register access + * @priv_size: if non-zero allocate this amount of bytes for private data + * + * Managed phy_package_join(). Shared storage fetched by this function, + * phy_package_leave() is automatically called on driver detach. See + * phy_package_join() for more information. + */ +int devm_phy_package_join(struct device *dev, struct phy_device *phydev, + int addr, size_t priv_size) +{ + struct phy_device **ptr; + int ret; + + ptr = devres_alloc(devm_phy_package_leave, sizeof(*ptr), + GFP_KERNEL); + if (!ptr) + return -ENOMEM; + + ret = phy_package_join(phydev, addr, priv_size); + + if (!ret) { + *ptr = phydev; + devres_add(dev, ptr); + } else { + devres_free(ptr); + } + + return ret; +} +EXPORT_SYMBOL_GPL(devm_phy_package_join); + +/** * phy_detach - detach a PHY device from its network device * @phydev: target phy_device struct * @@ -1524,6 +1666,9 @@ int phy_suspend(struct phy_device *phydev) struct phy_driver *phydrv = phydev->drv; int ret; + if (phydev->suspended) + return 0; + /* If the device has WOL enabled, we cannot suspend the PHY */ phy_ethtool_get_wol(phydev, &wol); if (wol.wolopts || (netdev && netdev->wol_enabled)) @@ -1768,6 +1913,90 @@ int genphy_setup_forced(struct phy_device *phydev) } EXPORT_SYMBOL(genphy_setup_forced); +static int genphy_setup_master_slave(struct phy_device *phydev) +{ + u16 ctl = 0; + + if (!phydev->is_gigabit_capable) + return 0; + + switch (phydev->master_slave_set) { + case MASTER_SLAVE_CFG_MASTER_PREFERRED: + ctl |= CTL1000_PREFER_MASTER; + break; + case MASTER_SLAVE_CFG_SLAVE_PREFERRED: + break; + case MASTER_SLAVE_CFG_MASTER_FORCE: + ctl |= CTL1000_AS_MASTER; + /* fallthrough */ + case MASTER_SLAVE_CFG_SLAVE_FORCE: + ctl |= CTL1000_ENABLE_MASTER; + break; + case MASTER_SLAVE_CFG_UNKNOWN: + case MASTER_SLAVE_CFG_UNSUPPORTED: + return 0; + default: + phydev_warn(phydev, "Unsupported Master/Slave mode\n"); + return -EOPNOTSUPP; + } + + return phy_modify_changed(phydev, MII_CTRL1000, + (CTL1000_ENABLE_MASTER | CTL1000_AS_MASTER | + CTL1000_PREFER_MASTER), ctl); +} + +static int genphy_read_master_slave(struct phy_device *phydev) +{ + int cfg, state; + u16 val; + + if (!phydev->is_gigabit_capable) { + phydev->master_slave_get = MASTER_SLAVE_CFG_UNSUPPORTED; + phydev->master_slave_state = MASTER_SLAVE_STATE_UNSUPPORTED; + return 0; + } + + phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN; + phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN; + + val = phy_read(phydev, MII_CTRL1000); + if (val < 0) + return val; + + if (val & CTL1000_ENABLE_MASTER) { + if (val & CTL1000_AS_MASTER) + cfg = MASTER_SLAVE_CFG_MASTER_FORCE; + else + cfg = MASTER_SLAVE_CFG_SLAVE_FORCE; + } else { + if (val & CTL1000_PREFER_MASTER) + cfg = MASTER_SLAVE_CFG_MASTER_PREFERRED; + else + cfg = MASTER_SLAVE_CFG_SLAVE_PREFERRED; + } + + val = phy_read(phydev, MII_STAT1000); + if (val < 0) + return val; + + if (val & LPA_1000MSFAIL) { + state = MASTER_SLAVE_STATE_ERR; + } else if (phydev->link) { + /* this bits are valid only for active link */ + if (val & LPA_1000MSRES) + state = MASTER_SLAVE_STATE_MASTER; + else + state = MASTER_SLAVE_STATE_SLAVE; + } else { + state = MASTER_SLAVE_STATE_UNKNOWN; + } + + phydev->master_slave_get = cfg; + phydev->master_slave_state = state; + + return 0; +} + /** * genphy_restart_aneg - Enable and Restart Autonegotiation * @phydev: target phy_device struct @@ -1826,6 +2055,12 @@ int __genphy_config_aneg(struct phy_device *phydev, bool changed) if (genphy_config_eee_advert(phydev)) changed = true; + err = genphy_setup_master_slave(phydev); + if (err < 0) + return err; + else if (err) + changed = true; + if (AUTONEG_ENABLE != phydev->autoneg) return genphy_setup_forced(phydev); @@ -2060,6 +2295,10 @@ int genphy_read_status(struct phy_device *phydev) phydev->pause = 0; phydev->asym_pause = 0; + err = genphy_read_master_slave(phydev); + if (err < 0) + return err; + err = genphy_read_lpa(phydev); if (err < 0) return err; @@ -2154,6 +2393,12 @@ int genphy_soft_reset(struct phy_device *phydev) if (ret < 0) return ret; + /* Clause 22 states that setting bit BMCR_RESET sets control registers + * to their default value. Therefore the POWER DOWN bit is supposed to + * be cleared after soft reset. + */ + phydev->suspended = 0; + ret = phy_poll_reset(phydev); if (ret) return ret; @@ -2627,7 +2872,6 @@ static struct phy_driver genphy_driver = { .phy_id = 0xffffffff, .phy_id_mask = 0xffffffff, .name = "Generic PHY", - .soft_reset = genphy_no_soft_reset, .get_features = genphy_read_abilities, .suspend = genphy_suspend, .resume = genphy_resume, |