From b64e6a8794d9d56f9713b6ceb9e3fdfc9c5f99af Mon Sep 17 00:00:00 2001 From: Raju Lakkaraju Date: Mon, 24 Oct 2022 13:55:16 +0530 Subject: [PATCH] net: phy: micrel: Add PHY Auto/MDI/MDI-X set driver for KSZ9131 Add support for MDI-X status and configuration for KSZ9131 chips Signed-off-by: Raju Lakkaraju Reviewed-by: Horatiu Vultur Reviewed-by: Andrew Lunn Signed-off-by: Jakub Kicinski --- drivers/net/phy/micrel.c | 77 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 77 insertions(+) diff --git a/drivers/net/phy/micrel.c b/drivers/net/phy/micrel.c index 54a17b5..26ce0c5 100644 --- a/drivers/net/phy/micrel.c +++ b/drivers/net/phy/micrel.c @@ -1295,6 +1295,81 @@ static int ksz9131_config_init(struct phy_device *phydev) return 0; } +#define MII_KSZ9131_AUTO_MDIX 0x1C +#define MII_KSZ9131_AUTO_MDI_SET BIT(7) +#define MII_KSZ9131_AUTO_MDIX_SWAP_OFF BIT(6) + +static int ksz9131_mdix_update(struct phy_device *phydev) +{ + int ret; + + ret = phy_read(phydev, MII_KSZ9131_AUTO_MDIX); + if (ret < 0) + return ret; + + if (ret & MII_KSZ9131_AUTO_MDIX_SWAP_OFF) { + if (ret & MII_KSZ9131_AUTO_MDI_SET) + phydev->mdix_ctrl = ETH_TP_MDI; + else + phydev->mdix_ctrl = ETH_TP_MDI_X; + } else { + phydev->mdix_ctrl = ETH_TP_MDI_AUTO; + } + + if (ret & MII_KSZ9131_AUTO_MDI_SET) + phydev->mdix = ETH_TP_MDI; + else + phydev->mdix = ETH_TP_MDI_X; + + return 0; +} + +static int ksz9131_config_mdix(struct phy_device *phydev, u8 ctrl) +{ + u16 val; + + switch (ctrl) { + case ETH_TP_MDI: + val = MII_KSZ9131_AUTO_MDIX_SWAP_OFF | + MII_KSZ9131_AUTO_MDI_SET; + break; + case ETH_TP_MDI_X: + val = MII_KSZ9131_AUTO_MDIX_SWAP_OFF; + break; + case ETH_TP_MDI_AUTO: + val = 0; + break; + default: + return 0; + } + + return phy_modify(phydev, MII_KSZ9131_AUTO_MDIX, + MII_KSZ9131_AUTO_MDIX_SWAP_OFF | + MII_KSZ9131_AUTO_MDI_SET, val); +} + +static int ksz9131_read_status(struct phy_device *phydev) +{ + int ret; + + ret = ksz9131_mdix_update(phydev); + if (ret < 0) + return ret; + + return genphy_read_status(phydev); +} + +static int ksz9131_config_aneg(struct phy_device *phydev) +{ + int ret; + + ret = ksz9131_config_mdix(phydev, phydev->mdix_ctrl); + if (ret) + return ret; + + return genphy_config_aneg(phydev); +} + #define KSZ8873MLL_GLOBAL_CONTROL_4 0x06 #define KSZ8873MLL_GLOBAL_CONTROL_4_DUPLEX BIT(6) #define KSZ8873MLL_GLOBAL_CONTROL_4_SPEED BIT(4) @@ -3304,6 +3379,8 @@ static struct phy_driver ksphy_driver[] = { .probe = kszphy_probe, .config_init = ksz9131_config_init, .config_intr = kszphy_config_intr, + .config_aneg = ksz9131_config_aneg, + .read_status = ksz9131_read_status, .handle_interrupt = kszphy_handle_interrupt, .get_sset_count = kszphy_get_sset_count, .get_strings = kszphy_get_strings, -- 2.7.4