From a2ab95a31352915bf0a1c49a583216801464f8f6 Mon Sep 17 00:00:00 2001 From: Raju Lakkaraju Date: Sat, 12 Feb 2022 21:23:15 +0530 Subject: [PATCH] net: lan743x: Add support for Clause-45 MDIO PHY management Add support for Clause-45 MDIO PHY management Signed-off-by: Raju Lakkaraju Signed-off-by: David S. Miller --- drivers/net/ethernet/microchip/lan743x_main.c | 109 +++++++++++++++++- drivers/net/ethernet/microchip/lan743x_main.h | 16 +++ 2 files changed, 122 insertions(+), 3 deletions(-) diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 8b0890aa66fa5..5282d25a6f9b8 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -18,6 +18,11 @@ #include "lan743x_main.h" #include "lan743x_ethtool.h" +#define MMD_ACCESS_ADDRESS 0 +#define MMD_ACCESS_WRITE 1 +#define MMD_ACCESS_READ 2 +#define MMD_ACCESS_READ_INC 3 + static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter) { u32 chip_rev; @@ -814,6 +819,96 @@ static int lan743x_mdiobus_write(struct mii_bus *bus, return ret; } +static u32 lan743x_mac_mmd_access(int id, int index, int op) +{ + u16 dev_addr; + u32 ret; + + dev_addr = (index >> 16) & 0x1f; + ret = (id << MAC_MII_ACC_PHY_ADDR_SHIFT_) & + MAC_MII_ACC_PHY_ADDR_MASK_; + ret |= (dev_addr << MAC_MII_ACC_MIIMMD_SHIFT_) & + MAC_MII_ACC_MIIMMD_MASK_; + if (op == MMD_ACCESS_WRITE) + ret |= MAC_MII_ACC_MIICMD_WRITE_; + else if (op == MMD_ACCESS_READ) + ret |= MAC_MII_ACC_MIICMD_READ_; + else if (op == MMD_ACCESS_READ_INC) + ret |= MAC_MII_ACC_MIICMD_READ_INC_; + else + ret |= MAC_MII_ACC_MIICMD_ADDR_; + ret |= (MAC_MII_ACC_MII_BUSY_ | MAC_MII_ACC_MIICL45_); + + return ret; +} + +static int lan743x_mdiobus_c45_read(struct mii_bus *bus, int phy_id, int index) +{ + struct lan743x_adapter *adapter = bus->priv; + u32 mmd_access; + int ret; + + /* comfirm MII not busy */ + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + if (ret < 0) + return ret; + if (index & MII_ADDR_C45) { + /* Load Register Address */ + lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff)); + mmd_access = lan743x_mac_mmd_access(phy_id, index, + MMD_ACCESS_ADDRESS); + lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access); + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + if (ret < 0) + return ret; + /* Read Data */ + mmd_access = lan743x_mac_mmd_access(phy_id, index, + MMD_ACCESS_READ); + lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access); + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + if (ret < 0) + return ret; + ret = lan743x_csr_read(adapter, MAC_MII_DATA); + return (int)(ret & 0xFFFF); + } + + ret = lan743x_mdiobus_read(bus, phy_id, index); + return ret; +} + +static int lan743x_mdiobus_c45_write(struct mii_bus *bus, + int phy_id, int index, u16 regval) +{ + struct lan743x_adapter *adapter = bus->priv; + u32 mmd_access; + int ret; + + /* confirm MII not busy */ + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + if (ret < 0) + return ret; + if (index & MII_ADDR_C45) { + /* Load Register Address */ + lan743x_csr_write(adapter, MAC_MII_DATA, (u32)(index & 0xffff)); + mmd_access = lan743x_mac_mmd_access(phy_id, index, + MMD_ACCESS_ADDRESS); + lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access); + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + if (ret < 0) + return ret; + /* Write Data */ + lan743x_csr_write(adapter, MAC_MII_DATA, (u32)regval); + mmd_access = lan743x_mac_mmd_access(phy_id, index, + MMD_ACCESS_WRITE); + lan743x_csr_write(adapter, MAC_MII_ACC, mmd_access); + ret = lan743x_mac_mii_wait_till_not_busy(adapter); + } else { + ret = lan743x_mdiobus_write(bus, phy_id, index, regval); + } + + return ret; +} + static void lan743x_mac_set_address(struct lan743x_adapter *adapter, u8 *addr) { @@ -2847,11 +2942,19 @@ static int lan743x_mdiobus_init(struct lan743x_adapter *adapter) netif_dbg(adapter, drv, adapter->netdev, "(R)GMII operation\n"); } + + adapter->mdiobus->probe_capabilities = MDIOBUS_C22_C45; + adapter->mdiobus->read = lan743x_mdiobus_c45_read; + adapter->mdiobus->write = lan743x_mdiobus_c45_write; + adapter->mdiobus->name = "lan743x-mdiobus-c45"; + netif_dbg(adapter, drv, adapter->netdev, "lan743x-mdiobus-c45\n"); + } else { + adapter->mdiobus->read = lan743x_mdiobus_read; + adapter->mdiobus->write = lan743x_mdiobus_write; + adapter->mdiobus->name = "lan743x-mdiobus"; + netif_dbg(adapter, drv, adapter->netdev, "lan743x-mdiobus\n"); } - adapter->mdiobus->read = lan743x_mdiobus_read; - adapter->mdiobus->write = lan743x_mdiobus_write; - adapter->mdiobus->name = "lan743x-mdiobus"; snprintf(adapter->mdiobus->id, MII_BUS_ID_SIZE, "pci-%s", pci_name(adapter->pdev)); diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h index 7c387ca2d25c9..2c8e76b4e1f79 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -151,6 +151,13 @@ #define MAC_RX_ADDRL (0x11C) #define MAC_MII_ACC (0x120) +#define MAC_MII_ACC_MDC_CYCLE_SHIFT_ (16) +#define MAC_MII_ACC_MDC_CYCLE_MASK_ (0x00070000) +#define MAC_MII_ACC_MDC_CYCLE_2_5MHZ_ (0) +#define MAC_MII_ACC_MDC_CYCLE_5MHZ_ (1) +#define MAC_MII_ACC_MDC_CYCLE_12_5MHZ_ (2) +#define MAC_MII_ACC_MDC_CYCLE_25MHZ_ (3) +#define MAC_MII_ACC_MDC_CYCLE_1_25MHZ_ (4) #define MAC_MII_ACC_PHY_ADDR_SHIFT_ (11) #define MAC_MII_ACC_PHY_ADDR_MASK_ (0x0000F800) #define MAC_MII_ACC_MIIRINDA_SHIFT_ (6) @@ -159,6 +166,15 @@ #define MAC_MII_ACC_MII_WRITE_ (0x00000002) #define MAC_MII_ACC_MII_BUSY_ BIT(0) +#define MAC_MII_ACC_MIIMMD_SHIFT_ (6) +#define MAC_MII_ACC_MIIMMD_MASK_ (0x000007C0) +#define MAC_MII_ACC_MIICL45_ BIT(3) +#define MAC_MII_ACC_MIICMD_MASK_ (0x00000006) +#define MAC_MII_ACC_MIICMD_ADDR_ (0x00000000) +#define MAC_MII_ACC_MIICMD_WRITE_ (0x00000002) +#define MAC_MII_ACC_MIICMD_READ_ (0x00000004) +#define MAC_MII_ACC_MIICMD_READ_INC_ (0x00000006) + #define MAC_MII_DATA (0x124) #define MAC_EEE_TX_LPI_REQ_DLY_CNT (0x130) -- 2.39.5