Messages in this thread Patch in this message | | | From | Raju Lakkaraju <> | Subject | [PATCH net-next V1 3/5] net: lan743x: Add support to SGMII block access functions | Date | Wed, 15 Jun 2022 16:02:35 +0530 |
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Add SGMII access read and write functions
Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com> --- Changes: V0 -> V1: 1. Remove the unlikely()
drivers/net/ethernet/microchip/lan743x_main.c | 69 +++++++++++++++++++ drivers/net/ethernet/microchip/lan743x_main.h | 12 ++++ 2 files changed, 81 insertions(+)
diff --git a/drivers/net/ethernet/microchip/lan743x_main.c b/drivers/net/ethernet/microchip/lan743x_main.c index 6352cba19691..3e690e78f79b 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.c +++ b/drivers/net/ethernet/microchip/lan743x_main.c @@ -909,6 +909,74 @@ static int lan743x_mdiobus_c45_write(struct mii_bus *bus, return ret; } +static int lan743x_sgmii_wait_till_not_busy(struct lan743x_adapter *adapter) +{ + u32 data; + int ret; + + ret = readx_poll_timeout(LAN743X_CSR_READ_OP, SGMII_ACC, data, + !(data & SGMII_ACC_SGMII_BZY_), 100, 1000000); + if (ret < 0) + netif_err(adapter, drv, adapter->netdev, + "%s: error %d sgmii wait timeout\n", __func__, ret); + + return ret; +} + +static int lan743x_sgmii_read(struct lan743x_adapter *adapter, u8 mmd, u16 addr) +{ + u32 mmd_access; + int ret; + u32 val; + + if (mmd > 31) { + netif_err(adapter, probe, adapter->netdev, + "%s mmd should <= 31\n", __func__); + return -EINVAL; + } + + mutex_lock(&adapter->sgmii_rw_lock); + /* Load Register Address */ + mmd_access = mmd << SGMII_ACC_SGMII_MMD_SHIFT_; + mmd_access |= (addr | SGMII_ACC_SGMII_BZY_); + lan743x_csr_write(adapter, SGMII_ACC, mmd_access); + ret = lan743x_sgmii_wait_till_not_busy(adapter); + if (ret < 0) + goto sgmii_unlock; + + val = lan743x_csr_read(adapter, SGMII_DATA); + ret = (int)(val & SGMII_DATA_MASK_); + +sgmii_unlock: + mutex_unlock(&adapter->sgmii_rw_lock); + + return ret; +} + +static int lan743x_sgmii_write(struct lan743x_adapter *adapter, + u8 mmd, u16 addr, u16 val) +{ + u32 mmd_access; + int ret; + + if (mmd > 31) { + netif_err(adapter, probe, adapter->netdev, + "%s mmd should <= 31\n", __func__); + return -EINVAL; + } + mutex_lock(&adapter->sgmii_rw_lock); + /* Load Register Data */ + lan743x_csr_write(adapter, SGMII_DATA, (u32)(val & SGMII_DATA_MASK_)); + /* Load Register Address */ + mmd_access = mmd << SGMII_ACC_SGMII_MMD_SHIFT_; + mmd_access |= (addr | SGMII_ACC_SGMII_BZY_ | SGMII_ACC_SGMII_WR_); + lan743x_csr_write(adapter, SGMII_ACC, mmd_access); + ret = lan743x_sgmii_wait_till_not_busy(adapter); + mutex_unlock(&adapter->sgmii_rw_lock); + + return ret; +} + static void lan743x_mac_set_address(struct lan743x_adapter *adapter, u8 *addr) { @@ -2875,6 +2943,7 @@ static int lan743x_hardware_init(struct lan743x_adapter *adapter, adapter->max_vector_count = PCI11X1X_MAX_VECTOR_COUNT; pci11x1x_strap_get_status(adapter); spin_lock_init(&adapter->eth_syslock_spinlock); + mutex_init(&adapter->sgmii_rw_lock); } else { adapter->max_tx_channels = LAN743X_MAX_TX_CHANNELS; adapter->used_tx_channels = LAN743X_USED_TX_CHANNELS; diff --git a/drivers/net/ethernet/microchip/lan743x_main.h b/drivers/net/ethernet/microchip/lan743x_main.h index 5d37263b25c8..4268b1d56090 100644 --- a/drivers/net/ethernet/microchip/lan743x_main.h +++ b/drivers/net/ethernet/microchip/lan743x_main.h @@ -288,6 +288,17 @@ #define MAC_WUCSR2 (0x600) +#define SGMII_ACC (0x720) +#define SGMII_ACC_SGMII_BZY_ BIT(31) +#define SGMII_ACC_SGMII_WR_ BIT(30) +#define SGMII_ACC_SGMII_MMD_SHIFT_ (16) +#define SGMII_ACC_SGMII_MMD_MASK_ GENMASK(20, 16) +#define SGMII_ACC_SGMII_MMD_VSR_ BIT(15) +#define SGMII_ACC_SGMII_ADDR_SHIFT_ (0) +#define SGMII_ACC_SGMII_ADDR_MASK_ GENMASK(15, 0) +#define SGMII_DATA (0x724) +#define SGMII_DATA_SHIFT_ (0) +#define SGMII_DATA_MASK_ GENMASK(15, 0) #define SGMII_CTL (0x728) #define SGMII_CTL_SGMII_ENABLE_ BIT(31) #define SGMII_CTL_LINK_STATUS_SOURCE_ BIT(8) @@ -940,6 +951,7 @@ struct lan743x_adapter { spinlock_t eth_syslock_spinlock; bool eth_syslock_en; u32 eth_syslock_acquire_cnt; + struct mutex sgmii_rw_lock; u8 max_tx_channels; u8 used_tx_channels; u8 max_vector_count; -- 2.25.1
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