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net: phy: micrel: add support for DLL setup on ksz9131

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Add support for DLL setup on KSZ9131.

Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
This commit is contained in:
Claudiu Beznea 2020-12-03 11:18:30 +02:00 committed by Eugen Hristev
parent ae3d8b6c40
commit c6df0e2ffd
1 changed files with 62 additions and 1 deletions
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63
drivers/net/phy/micrel_ksz90x1.c
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@ -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")) {