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net: phy: added ethtool master-slave configuration support

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To configure the T1 phy as master or slave using the ethtool -s <dev>
master-slave <forced-master/forced-slave>, the config_aneg and read
status functions are added.

Signed-off-by: Prasanna Vengateshan <prasanna.vengateshan@microchip.com>
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arun Ramadoss 2022-03-04 15:14:01 +05:30 committed by David S. Miller
parent 680baca546
commit 8a1b415d70
1 changed files with 90 additions and 0 deletions
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90
drivers/net/phy/microchip_t1.c
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@ -79,6 +79,9 @@
#define T1_EQ_WT_FD_LCK_FRZ_CFG 0x6D
#define T1_PST_EQ_LCK_STG1_FRZ_CFG 0x6E
#define T1_MODE_STAT_REG 0x11
#define T1_LINK_UP_MSK BIT(0)
#define DRIVER_AUTHOR "Nisar Sayed <nisar.sayed@microchip.com>"
#define DRIVER_DESC "Microchip LAN87XX/LAN937x T1 PHY driver"
@ -671,6 +674,89 @@ static int lan87xx_cable_test_get_status(struct phy_device *phydev,
return 0;
}
static int lan87xx_read_master_slave(struct phy_device *phydev)
{
int rc = 0;
phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
rc = phy_read(phydev, MII_CTRL1000);
if (rc < 0)
return rc;
if (rc & CTL1000_AS_MASTER)
phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
else
phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
rc = phy_read(phydev, MII_STAT1000);
if (rc < 0)
return rc;
if (rc & LPA_1000MSRES)
phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
else
phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
return rc;
}
static int lan87xx_read_status(struct phy_device *phydev)
{
int rc = 0;
rc = phy_read(phydev, T1_MODE_STAT_REG);
if (rc < 0)
return rc;
if (rc & T1_LINK_UP_MSK)
phydev->link = 1;
else
phydev->link = 0;
phydev->speed = SPEED_UNKNOWN;
phydev->duplex = DUPLEX_UNKNOWN;
phydev->pause = 0;
phydev->asym_pause = 0;
rc = lan87xx_read_master_slave(phydev);
if (rc < 0)
return rc;
rc = genphy_read_status_fixed(phydev);
if (rc < 0)
return rc;
return rc;
}
static int lan87xx_config_aneg(struct phy_device *phydev)
{
u16 ctl = 0;
int rc;
switch (phydev->master_slave_set) {
case MASTER_SLAVE_CFG_MASTER_FORCE:
ctl |= CTL1000_AS_MASTER;
break;
case MASTER_SLAVE_CFG_SLAVE_FORCE:
break;
case MASTER_SLAVE_CFG_UNKNOWN:
case MASTER_SLAVE_CFG_UNSUPPORTED:
return 0;
default:
phydev_warn(phydev, "Unsupported Master/Slave mode\n");
return -EOPNOTSUPP;
}
rc = phy_modify_changed(phydev, MII_CTRL1000, CTL1000_AS_MASTER, ctl);
if (rc == 1)
rc = genphy_soft_reset(phydev);
return rc;
}
static struct phy_driver microchip_t1_phy_driver[] = {
{
PHY_ID_MATCH_MODEL(PHY_ID_LAN87XX),
@ -682,6 +768,8 @@ static struct phy_driver microchip_t1_phy_driver[] = {
.handle_interrupt = lan87xx_handle_interrupt,
.suspend = genphy_suspend,
.resume = genphy_resume,
.config_aneg = lan87xx_config_aneg,
.read_status = lan87xx_read_status,
.cable_test_start = lan87xx_cable_test_start,
.cable_test_get_status = lan87xx_cable_test_get_status,
},
@ -692,6 +780,8 @@ static struct phy_driver microchip_t1_phy_driver[] = {
.config_init = lan87xx_config_init,
.suspend = genphy_suspend,
.resume = genphy_resume,
.config_aneg = lan87xx_config_aneg,
.read_status = lan87xx_read_status,
.cable_test_start = lan87xx_cable_test_start,
.cable_test_get_status = lan87xx_cable_test_get_status,
}