Commit a46d9d37 authored by Raju Lakkaraju's avatar Raju Lakkaraju Committed by David S. Miller
Browse files

net: lan743x: Add support for SGMII interface 



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

Signed-off-by: default avatarRaju Lakkaraju <Raju.Lakkaraju@microchip.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent ac16b6eb

drivers/net/ethernet/microchip/lan743x_main.c

+48 −0
Original line number Diff line number Diff line
@@ -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";

drivers/net/ethernet/microchip/lan743x_main.h

+17 −0
Original line number Diff line number Diff line
@@ -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;