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amd-xgbe-phy: Enhance parallel detection to support KR speed

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Add support to allow parallel detection to work in KR speed. With
both speed modes of KX and KR supported, KX must be checked first.

Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Lendacky, Thomas 2014-09-03 12:14:22 -05:00 committed by David S. Miller
parent e3eec4e793
commit e6f0562ff4
1 changed files with 28 additions and 2 deletions
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30
drivers/net/phy/amd-xgbe-phy.c
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@ -100,9 +100,11 @@ MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
#ifndef MDIO_PMA_10GBR_PMD_CTRL
#define MDIO_PMA_10GBR_PMD_CTRL 0x0096
#endif
#ifndef MDIO_PMA_10GBR_FEC_CTRL
#define MDIO_PMA_10GBR_FEC_CTRL 0x00ab
#endif
#ifndef MDIO_AN_XNP
#define MDIO_AN_XNP 0x0016
#endif
@ -110,14 +112,23 @@ MODULE_DESCRIPTION("AMD 10GbE (amd-xgbe) PHY driver");
#ifndef MDIO_AN_INTMASK
#define MDIO_AN_INTMASK 0x8001
#endif
#ifndef MDIO_AN_INT
#define MDIO_AN_INT 0x8002
#endif
#ifndef MDIO_AN_KR_CTRL
#define MDIO_AN_KR_CTRL 0x8003
#endif
#ifndef MDIO_CTRL1_SPEED1G
#define MDIO_CTRL1_SPEED1G (MDIO_CTRL1_SPEED10G & ~BMCR_SPEED100)
#endif
#ifndef MDIO_KR_CTRL_PDETECT
#define MDIO_KR_CTRL_PDETECT 0x01
#endif
/* SerDes integration register offsets */
#define SIR0_KR_RT_1 0x002c
#define SIR0_STATUS 0x0040
@ -341,6 +352,7 @@ struct amd_xgbe_phy_priv {
enum amd_xgbe_phy_rx kx_state;
struct work_struct an_work;
struct workqueue_struct *an_workqueue;
unsigned int parallel_detect;
};
static int amd_xgbe_an_enable_kr_training(struct phy_device *phydev)
@ -808,6 +820,13 @@ static enum amd_xgbe_phy_an amd_xgbe_an_start(struct phy_device *phydev)
/* Enable and start auto-negotiation */
phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_INT, 0);
ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_KR_CTRL);
if (ret < 0)
return AMD_XGBE_AN_ERROR;
ret |= MDIO_KR_CTRL_PDETECT;
phy_write_mmd(phydev, MDIO_MMD_AN, MDIO_AN_KR_CTRL, ret);
ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
if (ret < 0)
return AMD_XGBE_AN_ERROR;
@ -888,6 +907,10 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
int sleep;
unsigned int an_supported = 0;
/* Start in KX mode */
if (amd_xgbe_phy_set_mode(phydev, AMD_XGBE_MODE_KX))
priv->an_state = AMD_XGBE_AN_ERROR;
while (1) {
mutex_lock(&priv->an_mutex);
@ -895,8 +918,9 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
switch (priv->an_state) {
case AMD_XGBE_AN_START:
priv->an_state = amd_xgbe_an_start(phydev);
an_supported = 0;
priv->parallel_detect = 0;
priv->an_state = amd_xgbe_an_start(phydev);
break;
case AMD_XGBE_AN_EVENT:
@ -913,6 +937,7 @@ static void amd_xgbe_an_state_machine(struct work_struct *work)
break;
case AMD_XGBE_AN_COMPLETE:
priv->parallel_detect = an_supported ? 0 : 1;
netdev_info(phydev->attached_dev, "%s successful\n",
an_supported ? "Auto negotiation"
: "Parallel detection");
@ -1150,7 +1175,8 @@ static int amd_xgbe_phy_read_status(struct phy_device *phydev)
if (ret)
return ret;
if (phydev->autoneg == AUTONEG_ENABLE) {
if ((phydev->autoneg == AUTONEG_ENABLE) &&
!priv->parallel_detect) {
if (!(mmd_mask & MDIO_DEVS_AN))
return -EINVAL;