diff options
| author | Lin Yun Sheng <linyunsheng@huawei.com> | 2017-06-30 17:44:15 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2017-07-03 02:01:15 -0700 |
| commit | f0f9b4ed23381d97cde2ac64248198bc43608e6d (patch) | |
| tree | 0f771555ccba033f1d5a922785ac5d0f68e53c68 /drivers/net/phy | |
| parent | 6992c6c5dd4756e665824d4bc29f15b85c2907e0 (diff) | |
| download | linux-f0f9b4ed23381d97cde2ac64248198bc43608e6d.tar.bz2 | |
net: phy: Add phy loopback support in net phy framework
This patch add set_loopback in phy_driver, which is used by MAC
driver to enable or disable phy loopback. it also add a generic
genphy_loopback function, which use BMCR loopback bit to enable
or disable loopback.
Signed-off-by: Lin Yun Sheng <linyunsheng@huawei.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/marvell.c | 1 | ||||
| -rw-r--r-- | drivers/net/phy/phy_device.c | 51 |
2 files changed, 52 insertions, 0 deletions
diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index 8400403b3f62..5d314f143aea 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -2171,6 +2171,7 @@ static struct phy_driver marvell_drivers[] = { .get_sset_count = marvell_get_sset_count, .get_strings = marvell_get_strings, .get_stats = marvell_get_stats, + .set_loopback = genphy_loopback, }, { .phy_id = MARVELL_PHY_ID_88E1540, diff --git a/drivers/net/phy/phy_device.c b/drivers/net/phy/phy_device.c index acf00f071c9a..1790f7fec125 100644 --- a/drivers/net/phy/phy_device.c +++ b/drivers/net/phy/phy_device.c @@ -1136,6 +1136,39 @@ int phy_resume(struct phy_device *phydev) } EXPORT_SYMBOL(phy_resume); +int phy_loopback(struct phy_device *phydev, bool enable) +{ + struct phy_driver *phydrv = to_phy_driver(phydev->mdio.dev.driver); + int ret = 0; + + mutex_lock(&phydev->lock); + + if (enable && phydev->loopback_enabled) { + ret = -EBUSY; + goto out; + } + + if (!enable && !phydev->loopback_enabled) { + ret = -EINVAL; + goto out; + } + + if (phydev->drv && phydrv->set_loopback) + ret = phydrv->set_loopback(phydev, enable); + else + ret = -EOPNOTSUPP; + + if (ret) + goto out; + + phydev->loopback_enabled = enable; + +out: + mutex_unlock(&phydev->lock); + return ret; +} +EXPORT_SYMBOL(phy_loopback); + /* Generic PHY support and helper functions */ /** @@ -1584,6 +1617,23 @@ int genphy_resume(struct phy_device *phydev) } EXPORT_SYMBOL(genphy_resume); +int genphy_loopback(struct phy_device *phydev, bool enable) +{ + int value; + + value = phy_read(phydev, MII_BMCR); + if (value < 0) + return value; + + if (enable) + value |= BMCR_LOOPBACK; + else + value &= ~BMCR_LOOPBACK; + + return phy_write(phydev, MII_BMCR, value); +} +EXPORT_SYMBOL(genphy_loopback); + static int __set_phy_supported(struct phy_device *phydev, u32 max_speed) { /* The default values for phydev->supported are provided by the PHY @@ -1829,6 +1879,7 @@ static struct phy_driver genphy_driver = { .read_status = genphy_read_status, .suspend = genphy_suspend, .resume = genphy_resume, + .set_loopback = genphy_loopback, }; static int __init phy_init(void) |