Commit f0f9b4ed authored by Lin Yun Sheng's avatar Lin Yun Sheng Committed by David S. Miller

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: default avatarLin Yun Sheng <linyunsheng@huawei.com>
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 6992c6c5
......@@ -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,
......
......@@ -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)
......
......@@ -372,6 +372,7 @@ struct phy_c45_device_ids {
* has_fixups: Set to true if this phy has fixups/quirks.
* suspended: Set to true if this phy has been suspended successfully.
* sysfs_links: Internal boolean tracking sysfs symbolic links setup/removal.
* loopback_enabled: Set true if this phy has been loopbacked successfully.
* state: state of the PHY for management purposes
* dev_flags: Device-specific flags used by the PHY driver.
* link_timeout: The number of timer firings to wait before the
......@@ -409,6 +410,7 @@ struct phy_device {
bool has_fixups;
bool suspended;
bool sysfs_links;
bool loopback_enabled;
enum phy_state state;
......@@ -648,6 +650,7 @@ struct phy_driver {
int (*set_tunable)(struct phy_device *dev,
struct ethtool_tunable *tuna,
const void *data);
int (*set_loopback)(struct phy_device *dev, bool enable);
};
#define to_phy_driver(d) container_of(to_mdio_common_driver(d), \
struct phy_driver, mdiodrv)
......@@ -793,6 +796,7 @@ void phy_device_remove(struct phy_device *phydev);
int phy_init_hw(struct phy_device *phydev);
int phy_suspend(struct phy_device *phydev);
int phy_resume(struct phy_device *phydev);
int phy_loopback(struct phy_device *phydev, bool enable);
struct phy_device *phy_attach(struct net_device *dev, const char *bus_id,
phy_interface_t interface);
struct phy_device *phy_find_first(struct mii_bus *bus);
......@@ -847,6 +851,7 @@ int genphy_update_link(struct phy_device *phydev);
int genphy_read_status(struct phy_device *phydev);
int genphy_suspend(struct phy_device *phydev);
int genphy_resume(struct phy_device *phydev);
int genphy_loopback(struct phy_device *phydev, bool enable);
int genphy_soft_reset(struct phy_device *phydev);
static inline int genphy_no_soft_reset(struct phy_device *phydev)
{
......
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