@@ -102,10 +102,30 @@ static int _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg,
write_data &= 0xffff;
- mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE |
- (phy_register << PHY_IAC_REG_SHIFT) |
- (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data,
- MTK_PHY_IAC);
+ if (phy_reg & MII_ADDR_C45) {
+ u8 dev_num = (phy_reg >> MII_DEVADDR_C45_SHIFT) & GENMASK(4, 0);
+ u16 reg = (u16)(phy_reg & MII_REGADDR_C45_MASK);
+
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_SET_ADDR |
+ (phy_addr << PHY_IAC_ADDR_SHIFT) |
+ (dev_num << PHY_IAC_REG_SHIFT) |
+ reg,
+ MTK_PHY_IAC);
+
+ if (mtk_mdio_busy_wait(eth))
+ return -EBUSY;
+
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_WRITE |
+ (phy_addr << PHY_IAC_ADDR_SHIFT) |
+ (dev_num << PHY_IAC_REG_SHIFT) |
+ write_data,
+ MTK_PHY_IAC);
+ } else {
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_WRITE |
+ (phy_reg << PHY_IAC_REG_SHIFT) |
+ (phy_addr << PHY_IAC_ADDR_SHIFT) | write_data,
+ MTK_PHY_IAC);
+ }
if (mtk_mdio_busy_wait(eth))
return -EBUSY;
@@ -113,17 +133,36 @@ static int _mtk_mdio_write(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg,
return 0;
}
-static int _mtk_mdio_read(struct mtk_eth *eth, int phy_addr, int phy_reg)
+static int _mtk_mdio_read(struct mtk_eth *eth, u32 phy_addr, u32 phy_reg)
{
- u32 d;
+ int d;
if (mtk_mdio_busy_wait(eth))
return -EBUSY;
- mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ |
- (phy_reg << PHY_IAC_REG_SHIFT) |
- (phy_addr << PHY_IAC_ADDR_SHIFT),
- MTK_PHY_IAC);
+ if (phy_reg & MII_ADDR_C45) {
+ u8 dev_num = (phy_reg >> MII_DEVADDR_C45_SHIFT) & GENMASK(4, 0);
+ u16 reg = (u16)(phy_reg & MII_REGADDR_C45_MASK);
+
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_SET_ADDR |
+ (phy_addr << PHY_IAC_ADDR_SHIFT) |
+ (dev_num << PHY_IAC_REG_SHIFT) |
+ reg,
+ MTK_PHY_IAC);
+
+ if (mtk_mdio_busy_wait(eth))
+ return -EBUSY;
+
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START_C45 | PHY_IAC_READ_C45 |
+ (phy_addr << PHY_IAC_ADDR_SHIFT) |
+ (dev_num << PHY_IAC_REG_SHIFT),
+ MTK_PHY_IAC);
+ } else {
+ mtk_w32(eth, PHY_IAC_ACCESS | PHY_IAC_START | PHY_IAC_READ |
+ (phy_reg << PHY_IAC_REG_SHIFT) |
+ (phy_addr << PHY_IAC_ADDR_SHIFT),
+ MTK_PHY_IAC);
+ }
if (mtk_mdio_busy_wait(eth))
return -EBUSY;
@@ -497,6 +536,7 @@ static int mtk_mdio_init(struct mtk_eth *eth)
eth->mii_bus->name = "mdio";
eth->mii_bus->read = mtk_mdio_read;
eth->mii_bus->write = mtk_mdio_write;
+ eth->mii_bus->probe_capabilities = MDIOBUS_C22_C45;
eth->mii_bus->priv = eth;
eth->mii_bus->parent = eth->dev;
@@ -341,9 +341,12 @@
/* PHY Indirect Access Control registers */
#define MTK_PHY_IAC 0x10004
#define PHY_IAC_ACCESS BIT(31)
+#define PHY_IAC_SET_ADDR 0
#define PHY_IAC_READ BIT(19)
+#define PHY_IAC_READ_C45 (BIT(18) | BIT(19))
#define PHY_IAC_WRITE BIT(18)
#define PHY_IAC_START BIT(16)
+#define PHY_IAC_START_C45 0
#define PHY_IAC_ADDR_SHIFT 20
#define PHY_IAC_REG_SHIFT 25
#define PHY_IAC_TIMEOUT HZ
Implement read and write access to IEEE 802.3 Clause 45 Ethernet phy registers. Tested on the Ubiquiti UniFi 6 LR access point featuring MediaTek MT7622BV WiSoC with Aquantia AQR112C. Signed-off-by: Daniel Golle <daniel@makrotopia.org> --- v4: clean-up return values and types, split into two commits v3: return -1 instead of 0xffff on error in _mtk_mdio_write v2: use MII_DEVADDR_C45_SHIFT and MII_REGADDR_C45_MASK to extract device id and register address. Unify read and write functions to have identical types and parameter names where possible as we are anyway already replacing both function bodies. drivers/net/ethernet/mediatek/mtk_eth_soc.c | 60 +++++++++++++++++---- drivers/net/ethernet/mediatek/mtk_eth_soc.h | 3 ++ 2 files changed, 53 insertions(+), 10 deletions(-)