iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

net: lan743x: Add support for SGMII interface

Browse Source 
This change facilitates the selection between SGMII and (R)GIII
interfaces

Signed-off-by: Raju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raju Lakkaraju 2022-02-12 21:23:14 +05:30 committed by David S. Miller
parent ac16b6eb39
commit a46d9d37c4
2 changed files with 65 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

48
drivers/net/ethernet/microchip/lan743x_main.c
View File

@ -18,6 +18,34 @@
#include "lan743x_main.h"
#include "lan743x_ethtool.h"
static void pci11x1x_strap_get_status(struct lan743x_adapter *adapter)
{
u32 chip_rev;
u32 strap;
strap = lan743x_csr_read(adapter, STRAP_READ);
if (strap & STRAP_READ_USE_SGMII_EN_) {
if (strap & STRAP_READ_SGMII_EN_)
adapter->is_sgmii_en = true;
else
adapter->is_sgmii_en = false;
netif_dbg(adapter, drv, adapter->netdev,
"STRAP_READ: 0x%08X\n", strap);
} else {
chip_rev = lan743x_csr_read(adapter, FPGA_REV);
if (chip_rev) {
if (chip_rev & FPGA_SGMII_OP)
adapter->is_sgmii_en = true;
else
adapter->is_sgmii_en = false;
netif_dbg(adapter, drv, adapter->netdev,
"FPGA_REV: 0x%08X\n", chip_rev);
} else {
adapter->is_sgmii_en = false;
}
}
}
static bool is_pci11x1x_chip(struct lan743x_adapter *adapter)
{
struct lan743x_csr *csr = &adapter->csr;
@ -2744,6 +2772,7 @@ static int lan743x_hardware_init(struct lan743x_adapter *adapter,
adapter->max_tx_channels = PCI11X1X_MAX_TX_CHANNELS;
adapter->used_tx_channels = PCI11X1X_USED_TX_CHANNELS;
adapter->max_vector_count = PCI11X1X_MAX_VECTOR_COUNT;
pci11x1x_strap_get_status(adapter);
} else {
adapter->max_tx_channels = LAN743X_MAX_TX_CHANNELS;
adapter->used_tx_channels = LAN743X_USED_TX_CHANNELS;
@ -2792,6 +2821,7 @@ static int lan743x_hardware_init(struct lan743x_adapter *adapter,
static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
{
u32 sgmii_ctl;
int ret;
adapter->mdiobus = devm_mdiobus_alloc(&adapter->pdev->dev);
@ -2801,6 +2831,24 @@ static int lan743x_mdiobus_init(struct lan743x_adapter *adapter)
}
adapter->mdiobus->priv = (void *)adapter;
if (adapter->is_pci11x1x) {
if (adapter->is_sgmii_en) {
sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
sgmii_ctl |= SGMII_CTL_SGMII_ENABLE_;
sgmii_ctl &= ~SGMII_CTL_SGMII_POWER_DN_;
lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
netif_dbg(adapter, drv, adapter->netdev,
"SGMII operation\n");
} else {
sgmii_ctl = lan743x_csr_read(adapter, SGMII_CTL);
sgmii_ctl &= ~SGMII_CTL_SGMII_ENABLE_;
sgmii_ctl |= SGMII_CTL_SGMII_POWER_DN_;
lan743x_csr_write(adapter, SGMII_CTL, sgmii_ctl);
netif_dbg(adapter, drv, adapter->netdev,
"(R)GMII operation\n");
}
}
adapter->mdiobus->read = lan743x_mdiobus_read;
adapter->mdiobus->write = lan743x_mdiobus_write;
adapter->mdiobus->name = "lan743x-mdiobus";

17
drivers/net/ethernet/microchip/lan743x_main.h
View File

@ -30,6 +30,17 @@
#define FPGA_REV (0x04)
#define FPGA_REV_GET_MINOR_(fpga_rev) (((fpga_rev) >> 8) & 0x000000FF)
#define FPGA_REV_GET_MAJOR_(fpga_rev) ((fpga_rev) & 0x000000FF)
#define FPGA_SGMII_OP BIT(24)
#define STRAP_READ (0x0C)
#define STRAP_READ_USE_SGMII_EN_ BIT(22)
#define STRAP_READ_SGMII_EN_ BIT(6)
#define STRAP_READ_SGMII_REFCLK_ BIT(5)
#define STRAP_READ_SGMII_2_5G_ BIT(4)
#define STRAP_READ_BASE_X_ BIT(3)
#define STRAP_READ_RGMII_TXC_DELAY_EN_ BIT(2)
#define STRAP_READ_RGMII_RXC_DELAY_EN_ BIT(1)
#define STRAP_READ_ADV_PM_DISABLE_ BIT(0)
#define HW_CFG (0x010)
#define HW_CFG_RELOAD_TYPE_ALL_ (0x00000FC0)
@ -219,6 +230,11 @@
#define MAC_WUCSR2 (0x600)
#define SGMII_CTL (0x728)
#define SGMII_CTL_SGMII_ENABLE_ BIT(31)
#define SGMII_CTL_LINK_STATUS_SOURCE_ BIT(8)
#define SGMII_CTL_SGMII_POWER_DN_ BIT(1)
#define INT_STS (0x780)
#define INT_BIT_DMA_RX_(channel) BIT(24 + (channel))
#define INT_BIT_ALL_RX_ (0x0F000000)
@ -739,6 +755,7 @@ struct lan743x_adapter {
struct lan743x_tx tx[PCI11X1X_USED_TX_CHANNELS];
struct lan743x_rx rx[LAN743X_USED_RX_CHANNELS];
bool is_pci11x1x;
bool is_sgmii_en;
u8 max_tx_channels;
u8 used_tx_channels;
u8 max_vector_count;