diff options
| author | Claudiu Beznea <claudiu.beznea@microchip.com> | 2020-12-03 11:18:30 +0200 |
|---|---|---|
| committer | Eugen Hristev <eugen.hristev@microchip.com> | 2021-01-19 10:11:14 +0200 |
| commit | c6df0e2ffdc468ce34a7bc77fa5a298e0359e7a0 (patch) | |
| tree | 858a958c642a274dda72219e374aca2d558cbb60 /drivers/net | |
| parent | ae3d8b6c403218e68b56bce962ba7737161cc6f4 (diff) | |
| download | u-boot-c6df0e2ffdc468ce34a7bc77fa5a298e0359e7a0.tar.gz | |
net: phy: micrel: add support for DLL setup on ksz9131
Add support for DLL setup on KSZ9131.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Diffstat (limited to 'drivers/net')
| -rw-r--r-- | drivers/net/phy/micrel_ksz90x1.c | 63 |
1 files changed, 62 insertions, 1 deletions
diff --git a/drivers/net/phy/micrel_ksz90x1.c b/drivers/net/phy/micrel_ksz90x1.c index f0032e8ce1..d6694c5cd8 100644 --- a/drivers/net/phy/micrel_ksz90x1.c +++ b/drivers/net/phy/micrel_ksz90x1.c @@ -396,9 +396,70 @@ static struct phy_driver ksz9031_driver = { /* * KSZ9131 */ + +#define KSZ9131RN_MMD_COMMON_CTRL_REG 2 +#define KSZ9131RN_RXC_DLL_CTRL 76 +#define KSZ9131RN_TXC_DLL_CTRL 77 +#define KSZ9131RN_DLL_CTRL_BYPASS BIT_MASK(12) +#define KSZ9131RN_DLL_ENABLE_DELAY 0 +#define KSZ9131RN_DLL_DISABLE_DELAY BIT(12) + +static int ksz9131_config_rgmii_delay(struct phy_device *phydev) +{ + struct phy_driver *drv = phydev->drv; + u16 rxcdll_val, txcdll_val, val; + int ret; + + switch (phydev->interface) { + case PHY_INTERFACE_MODE_RGMII: + rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + break; + case PHY_INTERFACE_MODE_RGMII_ID: + rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; + txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; + break; + case PHY_INTERFACE_MODE_RGMII_RXID: + rxcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; + txcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + break; + case PHY_INTERFACE_MODE_RGMII_TXID: + rxcdll_val = KSZ9131RN_DLL_DISABLE_DELAY; + txcdll_val = KSZ9131RN_DLL_ENABLE_DELAY; + break; + default: + return 0; + } + + val = drv->readext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG, + KSZ9131RN_RXC_DLL_CTRL); + val &= ~KSZ9131RN_DLL_CTRL_BYPASS; + val |= rxcdll_val; + ret = drv->writeext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG, + KSZ9131RN_RXC_DLL_CTRL, val); + if (ret) + return ret; + + val = drv->readext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG, + KSZ9131RN_TXC_DLL_CTRL); + + val &= ~KSZ9131RN_DLL_CTRL_BYPASS; + val |= txcdll_val; + ret = drv->writeext(phydev, 0, KSZ9131RN_MMD_COMMON_CTRL_REG, + KSZ9131RN_TXC_DLL_CTRL, val); + + return ret; +} + static int ksz9131_config(struct phy_device *phydev) { - /* TBD: Implement Skew values for dts */ + int ret; + + if (phy_interface_is_rgmii(phydev)) { + ret = ksz9131_config_rgmii_delay(phydev); + if (ret) + return ret; + } /* add an option to disable the gigabit feature of this PHY */ if (env_get("disable_giga")) { |