drivers: net: xgene: Add 10GbE support

- Added 10GbE support
- Removed unused macros/variables
- Moved mac_init call to the end of hardware init

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 438 insertions, 30 deletions

diff --git a/drivers/net/ethernet/apm/xgene/Makefile b/drivers/net/ethernet/apm/xgene/Makefile
index c643e8a0a0dc..589b35247713 100644
--- a/drivers/net/ethernet/apm/xgene/Makefile
+++ b/drivers/net/ethernet/apm/xgene/Makefile
@@ -2,5 +2,6 @@
 # Makefile for APM X-Gene Ethernet Driver.
 #
 
-xgene-enet-objs := xgene_enet_hw.o xgene_enet_main.o xgene_enet_ethtool.o
+xgene-enet-objs := xgene_enet_hw.o xgene_enet_xgmac.o \
+		   xgene_enet_main.o xgene_enet_ethtool.o
 obj-$(CONFIG_NET_XGENE) += xgene-enet.o
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
index 084ac68aed8d..15ec4267779c 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_hw.h
@@ -42,6 +42,11 @@ static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
 	return (val & GENMASK(end, start)) >> start;
 }
 
+enum xgene_enet_rm {
+	RM0,
+	RM3 = 3
+};
+
 #define CSR_RING_ID		0x0008
 #define OVERWRITE		BIT(31)
 #define IS_BUFFER_POOL		BIT(20)
@@ -52,7 +57,6 @@ static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
 #define CSR_RING_WR_BASE	0x0070
 #define NUM_RING_CONFIG		5
 #define BUFPOOL_MODE		3
-#define RM3			3
 #define INC_DEC_CMD_ADDR	0x002c
 #define UDP_HDR_SIZE		2
 #define BUF_LEN_CODE_2K		0x5000
@@ -94,11 +98,9 @@ static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
 
 #define BLOCK_ETH_CSR_OFFSET		0x2000
 #define BLOCK_ETH_RING_IF_OFFSET	0x9000
-#define BLOCK_ETH_CLKRST_CSR_OFFSET	0xC000
 #define BLOCK_ETH_DIAG_CSR_OFFSET	0xD000
 
 #define BLOCK_ETH_MAC_OFFSET		0x0000
-#define BLOCK_ETH_STATS_OFFSET		0x0014
 #define BLOCK_ETH_MAC_CSR_OFFSET	0x2800
 
 #define MAC_ADDR_REG_OFFSET		0x00
@@ -107,12 +109,6 @@ static inline u32 xgene_get_bits(u32 val, u32 start, u32 end)
 #define MAC_READ_REG_OFFSET		0x0c
 #define MAC_COMMAND_DONE_REG_OFFSET	0x10
 
-#define STAT_ADDR_REG_OFFSET		0x00
-#define STAT_COMMAND_REG_OFFSET		0x04
-#define STAT_WRITE_REG_OFFSET		0x08
-#define STAT_READ_REG_OFFSET		0x0c
-#define STAT_COMMAND_DONE_REG_OFFSET	0x10
-
 #define MII_MGMT_CONFIG_ADDR		0x20
 #define MII_MGMT_COMMAND_ADDR		0x24
 #define MII_MGMT_ADDRESS_ADDR		0x28
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
index c4326444deaf..9b85239ceedf 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.c
@@ -21,6 +21,7 @@
 
 #include "xgene_enet_main.h"
 #include "xgene_enet_hw.h"
+#include "xgene_enet_xgmac.h"
 
 static void xgene_enet_init_bufpool(struct xgene_enet_desc_ring *buf_pool)
 {
@@ -390,7 +391,7 @@ static int xgene_enet_process_ring(struct xgene_enet_desc_ring *ring,
 		}
 	}
 
-	return budget;
+	return count;
 }
 
 static int xgene_enet_napi(struct napi_struct *napi, const int budget)
@@ -456,8 +457,10 @@ static int xgene_enet_open(struct net_device *ndev)
 		return ret;
 	napi_enable(&pdata->rx_ring->napi);
 
-	if (pdata->phy_dev)
+	if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
 		phy_start(pdata->phy_dev);
+	else
+		schedule_delayed_work(&pdata->link_work, PHY_POLL_LINK_OFF);
 
 	netif_start_queue(ndev);
 
@@ -471,8 +474,10 @@ static int xgene_enet_close(struct net_device *ndev)
 
 	netif_stop_queue(ndev);
 
-	if (pdata->phy_dev)
+	if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
 		phy_stop(pdata->phy_dev);
+	else
+		cancel_delayed_work_sync(&pdata->link_work);
 
 	napi_disable(&pdata->rx_ring->napi);
 	xgene_enet_free_irq(ndev);
@@ -615,7 +620,6 @@ static struct xgene_enet_desc_ring *xgene_enet_create_desc_ring(
 
 	ring->cmd_base = pdata->ring_cmd_addr + (ring->num << 6);
 	ring->cmd = ring->cmd_base + INC_DEC_CMD_ADDR;
-	pdata->rm = RM3;
 	ring = xgene_enet_setup_ring(ring);
 	netdev_dbg(ndev, "ring info: num=%d  size=%d  id=%d  slots=%d\n",
 		   ring->num, ring->size, ring->id, ring->slots);
@@ -805,8 +809,13 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 
 	pdata->phy_mode = of_get_phy_mode(pdev->dev.of_node);
 	if (pdata->phy_mode < 0) {
-		dev_err(dev, "Incorrect phy-connection-type in DTS\n");
-		return -EINVAL;
+		dev_err(dev, "Unable to get phy-connection-type\n");
+		return pdata->phy_mode;
+	}
+	if (pdata->phy_mode != PHY_INTERFACE_MODE_RGMII &&
+	    pdata->phy_mode != PHY_INTERFACE_MODE_XGMII) {
+		dev_err(dev, "Incorrect phy-connection-type specified\n");
+		return -ENODEV;
 	}
 
 	pdata->clk = devm_clk_get(&pdev->dev, NULL);
@@ -821,12 +830,18 @@ static int xgene_enet_get_resources(struct xgene_enet_pdata *pdata)
 	pdata->eth_csr_addr = base_addr + BLOCK_ETH_CSR_OFFSET;
 	pdata->eth_ring_if_addr = base_addr + BLOCK_ETH_RING_IF_OFFSET;
 	pdata->eth_diag_csr_addr = base_addr + BLOCK_ETH_DIAG_CSR_OFFSET;
-	pdata->mcx_mac_addr = base_addr + BLOCK_ETH_MAC_OFFSET;
-	pdata->mcx_stats_addr = base_addr + BLOCK_ETH_STATS_OFFSET;
-	pdata->mcx_mac_csr_addr = base_addr + BLOCK_ETH_MAC_CSR_OFFSET;
+	if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII) {
+		pdata->mcx_mac_addr = base_addr + BLOCK_ETH_MAC_OFFSET;
+		pdata->mcx_mac_csr_addr = base_addr + BLOCK_ETH_MAC_CSR_OFFSET;
+		pdata->rm = RM3;
+	} else {
+		pdata->mcx_mac_addr = base_addr + BLOCK_AXG_MAC_OFFSET;
+		pdata->mcx_mac_csr_addr = base_addr + BLOCK_AXG_MAC_CSR_OFFSET;
+		pdata->rm = RM0;
+	}
 	pdata->rx_buff_cnt = NUM_PKT_BUF;
 
-	return ret;
+	return 0;
 }
 
 static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
@@ -836,8 +851,7 @@ static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
 	u16 dst_ring_num;
 	int ret;
 
-	pdata->mac_ops->tx_disable(pdata);
-	pdata->mac_ops->rx_disable(pdata);
+	pdata->port_ops->reset(pdata);
 
 	ret = xgene_enet_create_desc_rings(ndev);
 	if (ret) {
@@ -856,14 +870,23 @@ static int xgene_enet_init_hw(struct xgene_enet_pdata *pdata)
 
 	dst_ring_num = xgene_enet_dst_ring_num(pdata->rx_ring);
 	pdata->port_ops->cle_bypass(pdata, dst_ring_num, buf_pool->id);
+	pdata->mac_ops->init(pdata);
 
 	return ret;
 }
 
 static void xgene_enet_setup_ops(struct xgene_enet_pdata *pdata)
 {
-	pdata->mac_ops = &xgene_gmac_ops;
-	pdata->port_ops = &xgene_gport_ops;
+	switch (pdata->phy_mode) {
+	case PHY_INTERFACE_MODE_RGMII:
+		pdata->mac_ops = &xgene_gmac_ops;
+		pdata->port_ops = &xgene_gport_ops;
+		break;
+	default:
+		pdata->mac_ops = &xgene_xgmac_ops;
+		pdata->port_ops = &xgene_xgport_ops;
+		break;
+	}
 }
 
 static int xgene_enet_probe(struct platform_device *pdev)
@@ -895,8 +918,6 @@ static int xgene_enet_probe(struct platform_device *pdev)
 		goto err;
 
 	xgene_enet_setup_ops(pdata);
-	pdata->port_ops->reset(pdata);
-	pdata->mac_ops->init(pdata);
 
 	ret = register_netdev(ndev);
 	if (ret) {
@@ -916,7 +937,10 @@ static int xgene_enet_probe(struct platform_device *pdev)
 
 	napi = &pdata->rx_ring->napi;
 	netif_napi_add(ndev, napi, xgene_enet_napi, NAPI_POLL_WEIGHT);
-	ret = xgene_enet_mdio_config(pdata);
+	if (pdata->phy_mode == PHY_INTERFACE_MODE_RGMII)
+		ret = xgene_enet_mdio_config(pdata);
+	else
+		INIT_DELAYED_WORK(&pdata->link_work, xgene_enet_link_state);
 
 	return ret;
 err:
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
index ac180f980fcd..86cf68b65584 100644
--- a/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_main.h
@@ -105,18 +105,17 @@ struct xgene_enet_pdata {
 	void __iomem *eth_ring_if_addr;
 	void __iomem *eth_diag_csr_addr;
 	void __iomem *mcx_mac_addr;
-	void __iomem *mcx_stats_addr;
 	void __iomem *mcx_mac_csr_addr;
 	void __iomem *base_addr;
 	void __iomem *ring_csr_addr;
 	void __iomem *ring_cmd_addr;
 	u32 phy_addr;
 	int phy_mode;
-	u32 speed;
-	u16 rm;
+	enum xgene_enet_rm rm;
 	struct rtnl_link_stats64 stats;
 	struct xgene_mac_ops *mac_ops;
 	struct xgene_port_ops *port_ops;
+	struct delayed_work link_work;
 };
 
 /* Set the specified value into a bit-field defined by its starting position
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
new file mode 100644
index 000000000000..cd64b9f18b58
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.c
@@ -0,0 +1,331 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "xgene_enet_main.h"
+#include "xgene_enet_hw.h"
+#include "xgene_enet_xgmac.h"
+
+static void xgene_enet_wr_csr(struct xgene_enet_pdata *pdata,
+			      u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_csr_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static void xgene_enet_wr_ring_if(struct xgene_enet_pdata *pdata,
+				  u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_ring_if_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static void xgene_enet_wr_diag_csr(struct xgene_enet_pdata *pdata,
+				   u32 offset, u32 val)
+{
+	void __iomem *addr = pdata->eth_diag_csr_addr + offset;
+
+	iowrite32(val, addr);
+}
+
+static bool xgene_enet_wr_indirect(void __iomem *addr, void __iomem *wr,
+				   void __iomem *cmd, void __iomem *cmd_done,
+				   u32 wr_addr, u32 wr_data)
+{
+	u32 done;
+	u8 wait = 10;
+
+	iowrite32(wr_addr, addr);
+	iowrite32(wr_data, wr);
+	iowrite32(XGENE_ENET_WR_CMD, cmd);
+
+	/* wait for write command to complete */
+	while (!(done = ioread32(cmd_done)) && wait--)
+		udelay(1);
+
+	if (!done)
+		return false;
+
+	iowrite32(0, cmd);
+
+	return true;
+}
+
+static void xgene_enet_wr_mac(struct xgene_enet_pdata *pdata,
+			      u32 wr_addr, u32 wr_data)
+{
+	void __iomem *addr, *wr, *cmd, *cmd_done;
+
+	addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+	wr = pdata->mcx_mac_addr + MAC_WRITE_REG_OFFSET;
+	cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+	cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+	if (!xgene_enet_wr_indirect(addr, wr, cmd, cmd_done, wr_addr, wr_data))
+		netdev_err(pdata->ndev, "MCX mac write failed, addr: %04x\n",
+			   wr_addr);
+}
+
+static void xgene_enet_rd_csr(struct xgene_enet_pdata *pdata,
+			      u32 offset, u32 *val)
+{
+	void __iomem *addr = pdata->eth_csr_addr + offset;
+
+	*val = ioread32(addr);
+}
+
+static void xgene_enet_rd_diag_csr(struct xgene_enet_pdata *pdata,
+				   u32 offset, u32 *val)
+{
+	void __iomem *addr = pdata->eth_diag_csr_addr + offset;
+
+	*val = ioread32(addr);
+}
+
+static bool xgene_enet_rd_indirect(void __iomem *addr, void __iomem *rd,
+				   void __iomem *cmd, void __iomem *cmd_done,
+				   u32 rd_addr, u32 *rd_data)
+{
+	u32 done;
+	u8 wait = 10;
+
+	iowrite32(rd_addr, addr);
+	iowrite32(XGENE_ENET_RD_CMD, cmd);
+
+	/* wait for read command to complete */
+	while (!(done = ioread32(cmd_done)) && wait--)
+		udelay(1);
+
+	if (!done)
+		return false;
+
+	*rd_data = ioread32(rd);
+	iowrite32(0, cmd);
+
+	return true;
+}
+
+static void xgene_enet_rd_mac(struct xgene_enet_pdata *pdata,
+			      u32 rd_addr, u32 *rd_data)
+{
+	void __iomem *addr, *rd, *cmd, *cmd_done;
+
+	addr = pdata->mcx_mac_addr + MAC_ADDR_REG_OFFSET;
+	rd = pdata->mcx_mac_addr + MAC_READ_REG_OFFSET;
+	cmd = pdata->mcx_mac_addr + MAC_COMMAND_REG_OFFSET;
+	cmd_done = pdata->mcx_mac_addr + MAC_COMMAND_DONE_REG_OFFSET;
+
+	if (!xgene_enet_rd_indirect(addr, rd, cmd, cmd_done, rd_addr, rd_data))
+		netdev_err(pdata->ndev, "MCX mac read failed, addr: %04x\n",
+			   rd_addr);
+}
+
+static int xgene_enet_ecc_init(struct xgene_enet_pdata *pdata)
+{
+	struct net_device *ndev = pdata->ndev;
+	u32 data;
+	u8 wait = 10;
+
+	xgene_enet_wr_diag_csr(pdata, ENET_CFG_MEM_RAM_SHUTDOWN_ADDR, 0x0);
+	do {
+		usleep_range(100, 110);
+		xgene_enet_rd_diag_csr(pdata, ENET_BLOCK_MEM_RDY_ADDR, &data);
+	} while ((data != 0xffffffff) && wait--);
+
+	if (data != 0xffffffff) {
+		netdev_err(ndev, "Failed to release memory from shutdown\n");
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static void xgene_enet_config_ring_if_assoc(struct xgene_enet_pdata *pdata)
+{
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIWQASSOC_ADDR, 0);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIFPQASSOC_ADDR, 0);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEWQASSOC_ADDR, 0);
+	xgene_enet_wr_ring_if(pdata, ENET_CFGSSQMIQMLITEFPQASSOC_ADDR, 0);
+}
+
+static void xgene_xgmac_reset(struct xgene_enet_pdata *pdata)
+{
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_0, HSTMACRST);
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_0, 0);
+}
+
+static void xgene_xgmac_set_mac_addr(struct xgene_enet_pdata *pdata)
+{
+	u32 addr0, addr1;
+	u8 *dev_addr = pdata->ndev->dev_addr;
+
+	addr0 = (dev_addr[3] << 24) | (dev_addr[2] << 16) |
+		(dev_addr[1] << 8) | dev_addr[0];
+	addr1 = (dev_addr[5] << 24) | (dev_addr[4] << 16);
+
+	xgene_enet_wr_mac(pdata, HSTMACADR_LSW_ADDR, addr0);
+	xgene_enet_wr_mac(pdata, HSTMACADR_MSW_ADDR, addr1);
+}
+
+static u32 xgene_enet_link_status(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_csr(pdata, XG_LINK_STATUS_ADDR, &data);
+
+	return data;
+}
+
+static void xgene_xgmac_init(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_xgmac_reset(pdata);
+
+	xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+	data |= HSTPPEN;
+	data &= ~HSTLENCHK;
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data);
+
+	xgene_enet_wr_mac(pdata, HSTMAXFRAME_LENGTH_ADDR, 0x06000600);
+	xgene_xgmac_set_mac_addr(pdata);
+
+	xgene_enet_rd_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, &data);
+	data |= CFG_RSIF_FPBUFF_TIMEOUT_EN;
+	xgene_enet_wr_csr(pdata, XG_RSIF_CONFIG_REG_ADDR, data);
+
+	xgene_enet_wr_csr(pdata, XG_CFG_BYPASS_ADDR, RESUME_TX);
+	xgene_enet_wr_csr(pdata, XGENET_RX_DV_GATE_REG_0_ADDR, 0);
+	xgene_enet_rd_csr(pdata, XG_ENET_SPARE_CFG_REG_ADDR, &data);
+	data |= BIT(12);
+	xgene_enet_wr_csr(pdata, XG_ENET_SPARE_CFG_REG_ADDR, data);
+	xgene_enet_wr_csr(pdata, XG_ENET_SPARE_CFG_REG_1_ADDR, 0x82);
+}
+
+static void xgene_xgmac_rx_enable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTRFEN);
+}
+
+static void xgene_xgmac_tx_enable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data | HSTTFEN);
+}
+
+static void xgene_xgmac_rx_disable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTRFEN);
+}
+
+static void xgene_xgmac_tx_disable(struct xgene_enet_pdata *pdata)
+{
+	u32 data;
+
+	xgene_enet_rd_mac(pdata, AXGMAC_CONFIG_1, &data);
+	xgene_enet_wr_mac(pdata, AXGMAC_CONFIG_1, data & ~HSTTFEN);
+}
+
+static void xgene_enet_reset(struct xgene_enet_pdata *pdata)
+{
+	clk_prepare_enable(pdata->clk);
+	clk_disable_unprepare(pdata->clk);
+	clk_prepare_enable(pdata->clk);
+
+	xgene_enet_ecc_init(pdata);
+	xgene_enet_config_ring_if_assoc(pdata);
+}
+
+static void xgene_enet_xgcle_bypass(struct xgene_enet_pdata *pdata,
+				    u32 dst_ring_num, u16 bufpool_id)
+{
+	u32 cb, fpsel;
+
+	xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG0_ADDR, &cb);
+	cb |= CFG_CLE_BYPASS_EN0;
+	CFG_CLE_IP_PROTOCOL0_SET(&cb, 3);
+	xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG0_ADDR, cb);
+
+	fpsel = xgene_enet_ring_bufnum(bufpool_id) - 0x20;
+	xgene_enet_rd_csr(pdata, XCLE_BYPASS_REG1_ADDR, &cb);
+	CFG_CLE_DSTQID0_SET(&cb, dst_ring_num);
+	CFG_CLE_FPSEL0_SET(&cb, fpsel);
+	xgene_enet_wr_csr(pdata, XCLE_BYPASS_REG1_ADDR, cb);
+}
+
+static void xgene_enet_shutdown(struct xgene_enet_pdata *pdata)
+{
+	clk_disable_unprepare(pdata->clk);
+}
+
+void xgene_enet_link_state(struct work_struct *work)
+{
+	struct xgene_enet_pdata *pdata = container_of(to_delayed_work(work),
+					 struct xgene_enet_pdata, link_work);
+	struct net_device *ndev = pdata->ndev;
+	u32 link_status, poll_interval;
+
+	link_status = xgene_enet_link_status(pdata);
+	if (link_status) {
+		if (!netif_carrier_ok(ndev)) {
+			netif_carrier_on(ndev);
+			xgene_xgmac_init(pdata);
+			xgene_xgmac_rx_enable(pdata);
+			xgene_xgmac_tx_enable(pdata);
+			netdev_info(ndev, "Link is Up - 10Gbps\n");
+		}
+		poll_interval = PHY_POLL_LINK_ON;
+	} else {
+		if (netif_carrier_ok(ndev)) {
+			xgene_xgmac_rx_disable(pdata);
+			xgene_xgmac_tx_disable(pdata);
+			netif_carrier_off(ndev);
+			netdev_info(ndev, "Link is Down\n");
+		}
+		poll_interval = PHY_POLL_LINK_OFF;
+	}
+
+	schedule_delayed_work(&pdata->link_work, poll_interval);
+}
+
+struct xgene_mac_ops xgene_xgmac_ops = {
+	.init = xgene_xgmac_init,
+	.reset = xgene_xgmac_reset,
+	.rx_enable = xgene_xgmac_rx_enable,
+	.tx_enable = xgene_xgmac_tx_enable,
+	.rx_disable = xgene_xgmac_rx_disable,
+	.tx_disable = xgene_xgmac_tx_disable,
+	.set_mac_addr = xgene_xgmac_set_mac_addr,
+};
+
+struct xgene_port_ops xgene_xgport_ops = {
+	.reset = xgene_enet_reset,
+	.cle_bypass = xgene_enet_xgcle_bypass,
+	.shutdown = xgene_enet_shutdown,
+};
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
new file mode 100644
index 000000000000..d2d59e7ed9ab
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_xgmac.h
@@ -0,0 +1,57 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *	    Keyur Chudgar <kchudgar@apm.com>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of  the GNU General  Public License as published by the
+ * Free Software Foundation;  either version 2 of the  License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef __XGENE_ENET_XGMAC_H__
+#define __XGENE_ENET_XGMAC_H__
+
+#define BLOCK_AXG_MAC_OFFSET		0x0800
+#define BLOCK_AXG_MAC_CSR_OFFSET	0x2000
+
+#define AXGMAC_CONFIG_0			0x0000
+#define AXGMAC_CONFIG_1			0x0004
+#define HSTMACRST			BIT(31)
+#define HSTTCTLEN			BIT(31)
+#define HSTTFEN				BIT(30)
+#define HSTRCTLEN			BIT(29)
+#define HSTRFEN				BIT(28)
+#define HSTPPEN				BIT(7)
+#define HSTDRPLT64			BIT(5)
+#define HSTLENCHK			BIT(3)
+#define HSTMACADR_LSW_ADDR		0x0010
+#define HSTMACADR_MSW_ADDR		0x0014
+#define HSTMAXFRAME_LENGTH_ADDR		0x0020
+
+#define XG_RSIF_CONFIG_REG_ADDR		0x00a0
+#define XCLE_BYPASS_REG0_ADDR           0x0160
+#define XCLE_BYPASS_REG1_ADDR           0x0164
+#define XG_CFG_BYPASS_ADDR		0x0204
+#define XG_LINK_STATUS_ADDR		0x0228
+#define XG_ENET_SPARE_CFG_REG_ADDR	0x040c
+#define XG_ENET_SPARE_CFG_REG_1_ADDR	0x0410
+#define XGENET_RX_DV_GATE_REG_0_ADDR	0x0804
+
+#define PHY_POLL_LINK_ON	(10 * HZ)
+#define PHY_POLL_LINK_OFF	(PHY_POLL_LINK_ON / 5)
+
+void xgene_enet_link_state(struct work_struct *work);
+extern struct xgene_mac_ops xgene_xgmac_ops;
+extern struct xgene_port_ops xgene_xgport_ops;
+
+#endif /* __XGENE_ENET_XGMAC_H__ */