Commit 5acde34a authored by Russell King's avatar Russell King Committed by David S. Miller

net: phy: add 802.3 clause 45 support to phylib

Add generic helpers for 802.3 clause 45 PHYs for >= 10Gbps support.
Reviewed-by: default avatarAndrew Lunn <andrew@lunn.ch>
Signed-off-by: default avatarRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 92046578
# Makefile for Linux PHY drivers and MDIO bus drivers # Makefile for Linux PHY drivers and MDIO bus drivers
libphy-y := phy.o phy-core.o phy_device.o libphy-y := phy.o phy-c45.o phy-core.o phy_device.o
mdio-bus-y += mdio_bus.o mdio_device.o mdio-bus-y += mdio_bus.o mdio_device.o
ifdef CONFIG_MDIO_DEVICE ifdef CONFIG_MDIO_DEVICE
......
/*
* Clause 45 PHY support
*/
#include <linux/ethtool.h>
#include <linux/export.h>
#include <linux/mdio.h>
#include <linux/mii.h>
#include <linux/phy.h>
/**
* genphy_c45_setup_forced - configures a forced speed
* @phydev: target phy_device struct
*/
int genphy_c45_pma_setup_forced(struct phy_device *phydev)
{
int ctrl1, ctrl2, ret;
/* Half duplex is not supported */
if (phydev->duplex != DUPLEX_FULL)
return -EINVAL;
ctrl1 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
if (ctrl1 < 0)
return ctrl1;
ctrl2 = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2);
if (ctrl2 < 0)
return ctrl2;
ctrl1 &= ~MDIO_CTRL1_SPEEDSEL;
/*
* PMA/PMD type selection is 1.7.5:0 not 1.7.3:0. See 45.2.1.6.1
* in 802.3-2012 and 802.3-2015.
*/
ctrl2 &= ~(MDIO_PMA_CTRL2_TYPE | 0x30);
switch (phydev->speed) {
case SPEED_10:
ctrl2 |= MDIO_PMA_CTRL2_10BT;
break;
case SPEED_100:
ctrl1 |= MDIO_PMA_CTRL1_SPEED100;
ctrl2 |= MDIO_PMA_CTRL2_100BTX;
break;
case SPEED_1000:
ctrl1 |= MDIO_PMA_CTRL1_SPEED1000;
/* Assume 1000base-T */
ctrl2 |= MDIO_PMA_CTRL2_1000BT;
break;
case SPEED_10000:
ctrl1 |= MDIO_CTRL1_SPEED10G;
/* Assume 10Gbase-T */
ctrl2 |= MDIO_PMA_CTRL2_10GBT;
break;
default:
return -EINVAL;
}
ret = phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1, ctrl1);
if (ret < 0)
return ret;
return phy_write_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL2, ctrl2);
}
EXPORT_SYMBOL_GPL(genphy_c45_pma_setup_forced);
/**
* genphy_c45_an_disable_aneg - disable auto-negotiation
* @phydev: target phy_device struct
*
* Disable auto-negotiation in the Clause 45 PHY. The link parameters
* parameters are controlled through the PMA/PMD MMD registers.
*
* Returns zero on success, negative errno code on failure.
*/
int genphy_c45_an_disable_aneg(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
if (val < 0)
return val;
val &= ~(MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, val);
}
EXPORT_SYMBOL_GPL(genphy_c45_an_disable_aneg);
/**
* genphy_c45_restart_aneg - Enable and restart auto-negotiation
* @phydev: target phy_device struct
*
* This assumes that the auto-negotiation MMD is present.
*
* Enable and restart auto-negotiation.
*/
int genphy_c45_restart_aneg(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
if (val < 0)
return val;
val |= MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART;
return phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1, val);
}
EXPORT_SYMBOL_GPL(genphy_c45_restart_aneg);
/**
* genphy_c45_aneg_done - return auto-negotiation complete status
* @phydev: target phy_device struct
*
* This assumes that the auto-negotiation MMD is present.
*
* Reads the status register from the auto-negotiation MMD, returning:
* - positive if auto-negotiation is complete
* - negative errno code on error
* - zero otherwise
*/
int genphy_c45_aneg_done(struct phy_device *phydev)
{
int val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
return val < 0 ? val : val & MDIO_AN_STAT1_COMPLETE ? 1 : 0;
}
EXPORT_SYMBOL_GPL(genphy_c45_aneg_done);
/**
* genphy_c45_read_link - read the overall link status from the MMDs
* @phydev: target phy_device struct
* @mmd_mask: MMDs to read status from
*
* Read the link status from the specified MMDs, and if they all indicate
* that the link is up, return positive. If an error is encountered,
* a negative errno will be returned, otherwise zero.
*/
int genphy_c45_read_link(struct phy_device *phydev, u32 mmd_mask)
{
int val, devad;
bool link = true;
while (mmd_mask) {
devad = __ffs(mmd_mask);
mmd_mask &= ~BIT(devad);
/* The link state is latched low so that momentary link
* drops can be detected. Do not double-read the status
* register if the link is down.
*/
val = phy_read_mmd(phydev, devad, MDIO_STAT1);
if (val < 0)
return val;
if (!(val & MDIO_STAT1_LSTATUS))
link = false;
}
return link;
}
EXPORT_SYMBOL_GPL(genphy_c45_read_link);
/**
* genphy_c45_read_lpa - read the link partner advertisment and pause
* @phydev: target phy_device struct
*
* Read the Clause 45 defined base (7.19) and 10G (7.33) status registers,
* filling in the link partner advertisment, pause and asym_pause members
* in @phydev. This assumes that the auto-negotiation MMD is present, and
* the backplane bit (7.48.0) is clear. Clause 45 PHY drivers are expected
* to fill in the remainder of the link partner advert from vendor registers.
*/
int genphy_c45_read_lpa(struct phy_device *phydev)
{
int val;
/* Read the link partner's base page advertisment */
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_LPA);
if (val < 0)
return val;
phydev->lp_advertising = mii_lpa_to_ethtool_lpa_t(val);
phydev->pause = val & LPA_PAUSE_CAP ? 1 : 0;
phydev->asym_pause = val & LPA_PAUSE_ASYM ? 1 : 0;
/* Read the link partner's 10G advertisment */
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_STAT);
if (val < 0)
return val;
if (val & MDIO_AN_10GBT_STAT_LP10G)
phydev->lp_advertising |= ADVERTISED_10000baseT_Full;
return 0;
}
EXPORT_SYMBOL_GPL(genphy_c45_read_lpa);
/**
* genphy_c45_read_pma - read link speed etc from PMA
* @phydev: target phy_device struct
*/
int genphy_c45_read_pma(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_CTRL1);
if (val < 0)
return val;
switch (val & MDIO_CTRL1_SPEEDSEL) {
case 0:
phydev->speed = SPEED_10;
break;
case MDIO_PMA_CTRL1_SPEED100:
phydev->speed = SPEED_100;
break;
case MDIO_PMA_CTRL1_SPEED1000:
phydev->speed = SPEED_1000;
break;
case MDIO_CTRL1_SPEED10G:
phydev->speed = SPEED_10000;
break;
default:
phydev->speed = SPEED_UNKNOWN;
break;
}
phydev->duplex = DUPLEX_FULL;
return 0;
}
EXPORT_SYMBOL_GPL(genphy_c45_read_pma);
...@@ -1508,27 +1508,19 @@ EXPORT_SYMBOL(genphy_read_status); ...@@ -1508,27 +1508,19 @@ EXPORT_SYMBOL(genphy_read_status);
static int gen10g_read_status(struct phy_device *phydev) static int gen10g_read_status(struct phy_device *phydev)
{ {
int devad, reg;
u32 mmd_mask = phydev->c45_ids.devices_in_package; u32 mmd_mask = phydev->c45_ids.devices_in_package;
int ret;
phydev->link = 1;
/* For now just lie and say it's 10G all the time */ /* For now just lie and say it's 10G all the time */
phydev->speed = SPEED_10000; phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL; phydev->duplex = DUPLEX_FULL;
for (devad = 0; mmd_mask; devad++, mmd_mask = mmd_mask >> 1) { /* Avoid reading the vendor MMDs */
if (!(mmd_mask & 1)) mmd_mask &= ~(BIT(MDIO_MMD_VEND1) | BIT(MDIO_MMD_VEND2));
continue;
/* Read twice because link state is latched and a ret = genphy_c45_read_link(phydev, mmd_mask);
* read moves the current state into the register
*/ phydev->link = ret > 0 ? 1 : 0;
phy_read_mmd(phydev, devad, MDIO_STAT1);
reg = phy_read_mmd(phydev, devad, MDIO_STAT1);
if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
phydev->link = 0;
}
return 0; return 0;
} }
......
...@@ -827,6 +827,8 @@ static inline const char *phydev_name(const struct phy_device *phydev) ...@@ -827,6 +827,8 @@ static inline const char *phydev_name(const struct phy_device *phydev)
void phy_attached_print(struct phy_device *phydev, const char *fmt, ...) void phy_attached_print(struct phy_device *phydev, const char *fmt, ...)
__printf(2, 3); __printf(2, 3);
void phy_attached_info(struct phy_device *phydev); void phy_attached_info(struct phy_device *phydev);
/* Clause 22 PHY */
int genphy_config_init(struct phy_device *phydev); int genphy_config_init(struct phy_device *phydev);
int genphy_setup_forced(struct phy_device *phydev); int genphy_setup_forced(struct phy_device *phydev);
int genphy_restart_aneg(struct phy_device *phydev); int genphy_restart_aneg(struct phy_device *phydev);
...@@ -841,6 +843,16 @@ static inline int genphy_no_soft_reset(struct phy_device *phydev) ...@@ -841,6 +843,16 @@ static inline int genphy_no_soft_reset(struct phy_device *phydev)
{ {
return 0; return 0;
} }
/* Clause 45 PHY */
int genphy_c45_restart_aneg(struct phy_device *phydev);
int genphy_c45_aneg_done(struct phy_device *phydev);
int genphy_c45_read_link(struct phy_device *phydev, u32 mmd_mask);
int genphy_c45_read_lpa(struct phy_device *phydev);
int genphy_c45_read_pma(struct phy_device *phydev);
int genphy_c45_pma_setup_forced(struct phy_device *phydev);
int genphy_c45_an_disable_aneg(struct phy_device *phydev);
void phy_driver_unregister(struct phy_driver *drv); void phy_driver_unregister(struct phy_driver *drv);
void phy_drivers_unregister(struct phy_driver *drv, int n); void phy_drivers_unregister(struct phy_driver *drv, int n);
int phy_driver_register(struct phy_driver *new_driver, struct module *owner); int phy_driver_register(struct phy_driver *new_driver, struct module *owner);
......
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