net: Add Gigabit Ethernet driver of Topcliff PCH

Signed-off-by: NMasayuki Ohtake <masa-korg@dsn.okisemi.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/Kconfig

@@ -2515,6 +2515,18 @@ config S6GMAC
 
 source "drivers/net/stmmac/Kconfig"
 
+config PCH_GBE
+	tristate "PCH Gigabit Ethernet"
+	depends on PCI
+	---help---
+	  This is a gigabit ethernet driver for Topcliff PCH.
+	  Topcliff PCH is the platform controller hub that is used in Intel's
+	  general embedded platform.
+	  Topcliff PCH has Gigabit Ethernet interface.
+	  Using this interface, it is able to access system devices connected
+	  to Gigabit Ethernet.
+	  This driver enables Gigabit Ethernet function.
+
 endif # NETDEV_1000
 
 #

drivers/net/Makefile

@@ -298,3 +298,4 @@ obj-$(CONFIG_WIMAX) += wimax/
 obj-$(CONFIG_CAIF) += caif/
 
 obj-$(CONFIG_OCTEON_MGMT_ETHERNET) += octeon/
+obj-$(CONFIG_PCH_GBE) += pch_gbe/

drivers/net/pch_gbe/Makefile

+obj-$(CONFIG_PCH_GBE) += pch_gbe.o
+
+pch_gbe-y := pch_gbe_phy.o pch_gbe_ethtool.o pch_gbe_param.o
+pch_gbe-y += pch_gbe_api.o pch_gbe_main.o

drivers/net/pch_gbe/pch_gbe_api.c

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include "pch_gbe.h"
+#include "pch_gbe_phy.h"
+
+/* bus type values */
+#define pch_gbe_bus_type_unknown	0
+#define pch_gbe_bus_type_pci		1
+#define pch_gbe_bus_type_pcix		2
+#define pch_gbe_bus_type_pci_express	3
+#define pch_gbe_bus_type_reserved	4
+
+/* bus speed values */
+#define pch_gbe_bus_speed_unknown	0
+#define pch_gbe_bus_speed_33		1
+#define pch_gbe_bus_speed_66		2
+#define pch_gbe_bus_speed_100		3
+#define pch_gbe_bus_speed_120		4
+#define pch_gbe_bus_speed_133		5
+#define pch_gbe_bus_speed_2500		6
+#define pch_gbe_bus_speed_reserved	7
+
+/* bus width values */
+#define pch_gbe_bus_width_unknown	0
+#define pch_gbe_bus_width_pcie_x1	1
+#define pch_gbe_bus_width_pcie_x2	2
+#define pch_gbe_bus_width_pcie_x4	4
+#define pch_gbe_bus_width_32		5
+#define pch_gbe_bus_width_64		6
+#define pch_gbe_bus_width_reserved	7
+
+/**
+ * pch_gbe_plat_get_bus_info - Obtain bus information for adapter
+ * @hw:	Pointer to the HW structure
+ */
+static void pch_gbe_plat_get_bus_info(struct pch_gbe_hw *hw)
+{
+	hw->bus.type  = pch_gbe_bus_type_pci_express;
+	hw->bus.speed = pch_gbe_bus_speed_2500;
+	hw->bus.width = pch_gbe_bus_width_pcie_x1;
+}
+
+/**
+ * pch_gbe_plat_init_hw - Initialize hardware
+ * @hw:	Pointer to the HW structure
+ * Returns
+ *	0:		Successfully
+ *	Negative value:	Failed-EBUSY
+ */
+static s32 pch_gbe_plat_init_hw(struct pch_gbe_hw *hw)
+{
+	s32 ret_val;
+
+	ret_val = pch_gbe_phy_get_id(hw);
+	if (ret_val) {
+		pr_err("pch_gbe_phy_get_id error\n");
+		return ret_val;
+	}
+	pch_gbe_phy_init_setting(hw);
+	/* Setup Mac interface option RGMII */
+#ifdef PCH_GBE_MAC_IFOP_RGMII
+	pch_gbe_phy_set_rgmii(hw);
+#endif
+	return ret_val;
+}
+
+static const struct pch_gbe_functions pch_gbe_ops = {
+	.get_bus_info      = pch_gbe_plat_get_bus_info,
+	.init_hw           = pch_gbe_plat_init_hw,
+	.read_phy_reg      = pch_gbe_phy_read_reg_miic,
+	.write_phy_reg     = pch_gbe_phy_write_reg_miic,
+	.reset_phy         = pch_gbe_phy_hw_reset,
+	.sw_reset_phy      = pch_gbe_phy_sw_reset,
+	.power_up_phy      = pch_gbe_phy_power_up,
+	.power_down_phy    = pch_gbe_phy_power_down,
+	.read_mac_addr     = pch_gbe_mac_read_mac_addr
+};
+
+/**
+ * pch_gbe_plat_init_function_pointers - Init func ptrs
+ * @hw:	Pointer to the HW structure
+ */
+void pch_gbe_plat_init_function_pointers(struct pch_gbe_hw *hw)
+{
+	/* Set PHY parameter */
+	hw->phy.reset_delay_us     = PCH_GBE_PHY_RESET_DELAY_US;
+	/* Set function pointers */
+	hw->func = &pch_gbe_ops;
+}
+
+/**
+ * pch_gbe_hal_setup_init_funcs - Initializes function pointers
+ * @hw:	Pointer to the HW structure
+ * Returns
+ *	0:	Successfully
+ *	ENOSYS:	Function is not registered
+ */
+inline s32 pch_gbe_hal_setup_init_funcs(struct pch_gbe_hw *hw)
+{
+	if (!hw->reg) {
+		pr_err("ERROR: Registers not mapped\n");
+		return -ENOSYS;
+	}
+	pch_gbe_plat_init_function_pointers(hw);
+	return 0;
+}
+
+/**
+ * pch_gbe_hal_get_bus_info - Obtain bus information for adapter
+ * @hw:	Pointer to the HW structure
+ */
+inline void pch_gbe_hal_get_bus_info(struct pch_gbe_hw *hw)
+{
+	if (!hw->func->get_bus_info)
+		pr_err("ERROR: configuration\n");
+	else
+		hw->func->get_bus_info(hw);
+}
+
+/**
+ * pch_gbe_hal_init_hw - Initialize hardware
+ * @hw:	Pointer to the HW structure
+ * Returns
+ *	0:	Successfully
+ *	ENOSYS:	Function is not registered
+ */
+inline s32 pch_gbe_hal_init_hw(struct pch_gbe_hw *hw)
+{
+	if (!hw->func->init_hw) {
+		pr_err("ERROR: configuration\n");
+		return -ENOSYS;
+	}
+	return hw->func->init_hw(hw);
+}
+
+/**
+ * pch_gbe_hal_read_phy_reg - Reads PHY register
+ * @hw:	    Pointer to the HW structure
+ * @offset: The register to read
+ * @data:   The buffer to store the 16-bit read.
+ * Returns
+ *	0:	Successfully
+ *	Negative value:	Failed
+ */
+inline s32 pch_gbe_hal_read_phy_reg(struct pch_gbe_hw *hw, u32 offset,
+					u16 *data)
+{
+	if (!hw->func->read_phy_reg)
+		return 0;
+	return hw->func->read_phy_reg(hw, offset, data);
+}
+
+/**
+ * pch_gbe_hal_write_phy_reg - Writes PHY register
+ * @hw:	    Pointer to the HW structure
+ * @offset: The register to read
+ * @data:   The value to write.
+ * Returns
+ *	0:	Successfully
+ *	Negative value:	Failed
+ */
+inline s32 pch_gbe_hal_write_phy_reg(struct pch_gbe_hw *hw, u32 offset,
+					u16 data)
+{
+	if (!hw->func->write_phy_reg)
+		return 0;
+	return hw->func->write_phy_reg(hw, offset, data);
+}
+
+/**
+ * pch_gbe_hal_phy_hw_reset - Hard PHY reset
+ * @hw:	    Pointer to the HW structure
+ */
+inline void pch_gbe_hal_phy_hw_reset(struct pch_gbe_hw *hw)
+{
+	if (!hw->func->reset_phy)
+		pr_err("ERROR: configuration\n");
+	else
+		hw->func->reset_phy(hw);
+}
+
+/**
+ * pch_gbe_hal_phy_sw_reset - Soft PHY reset
+ * @hw:	    Pointer to the HW structure
+ */
+inline void pch_gbe_hal_phy_sw_reset(struct pch_gbe_hw *hw)
+{
+	if (!hw->func->sw_reset_phy)
+		pr_err("ERROR: configuration\n");
+	else
+		hw->func->sw_reset_phy(hw);
+}
+
+/**
+ * pch_gbe_hal_read_mac_addr - Reads MAC address
+ * @hw:	Pointer to the HW structure
+ * Returns
+ *	0:	Successfully
+ *	ENOSYS:	Function is not registered
+ */
+inline s32 pch_gbe_hal_read_mac_addr(struct pch_gbe_hw *hw)
+{
+	if (!hw->func->read_mac_addr) {
+		pr_err("ERROR: configuration\n");
+		return -ENOSYS;
+	}
+	return hw->func->read_mac_addr(hw);
+}
+
+/**
+ * pch_gbe_hal_power_up_phy - Power up PHY
+ * @hw:	Pointer to the HW structure
+ */
+inline void pch_gbe_hal_power_up_phy(struct pch_gbe_hw *hw)
+{
+	if (hw->func->power_up_phy)
+		hw->func->power_up_phy(hw);
+}
+
+/**
+ * pch_gbe_hal_power_down_phy - Power down PHY
+ * @hw:	Pointer to the HW structure
+ */
+inline void pch_gbe_hal_power_down_phy(struct pch_gbe_hw *hw)
+{
+	if (hw->func->power_down_phy)
+		hw->func->power_down_phy(hw);
+}

drivers/net/pch_gbe/pch_gbe_api.h

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef _PCH_GBE_API_H_
+#define _PCH_GBE_API_H_
+
+#include "pch_gbe_phy.h"
+
+s32 pch_gbe_hal_setup_init_funcs(struct pch_gbe_hw *hw);
+void pch_gbe_hal_get_bus_info(struct pch_gbe_hw *hw);
+s32 pch_gbe_hal_init_hw(struct pch_gbe_hw *hw);
+s32 pch_gbe_hal_read_phy_reg(struct pch_gbe_hw *hw, u32 offset, u16 *data);
+s32 pch_gbe_hal_write_phy_reg(struct pch_gbe_hw *hw, u32 offset, u16 data);
+void pch_gbe_hal_phy_hw_reset(struct pch_gbe_hw *hw);
+void pch_gbe_hal_phy_sw_reset(struct pch_gbe_hw *hw);
+s32 pch_gbe_hal_read_mac_addr(struct pch_gbe_hw *hw);
+void pch_gbe_hal_power_up_phy(struct pch_gbe_hw *hw);
+void pch_gbe_hal_power_down_phy(struct pch_gbe_hw *hw);
+
+#endif

drivers/net/pch_gbe/pch_gbe_ethtool.c

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+#include "pch_gbe.h"
+#include "pch_gbe_api.h"
+
+/**
+ * pch_gbe_stats - Stats item infomation
+ */
+struct pch_gbe_stats {
+	char string[ETH_GSTRING_LEN];
+	size_t size;
+	size_t offset;
+};
+
+#define PCH_GBE_STAT(m)						\
+{								\
+	.string = #m,						\
+	.size = FIELD_SIZEOF(struct pch_gbe_hw_stats, m),	\
+	.offset = offsetof(struct pch_gbe_hw_stats, m),		\
+}
+
+/**
+ * pch_gbe_gstrings_stats - ethtool information status name list
+ */
+static const struct pch_gbe_stats pch_gbe_gstrings_stats[] = {
+	PCH_GBE_STAT(rx_packets),
+	PCH_GBE_STAT(tx_packets),
+	PCH_GBE_STAT(rx_bytes),
+	PCH_GBE_STAT(tx_bytes),
+	PCH_GBE_STAT(rx_errors),
+	PCH_GBE_STAT(tx_errors),
+	PCH_GBE_STAT(rx_dropped),
+	PCH_GBE_STAT(tx_dropped),
+	PCH_GBE_STAT(multicast),
+	PCH_GBE_STAT(collisions),
+	PCH_GBE_STAT(rx_crc_errors),
+	PCH_GBE_STAT(rx_frame_errors),
+	PCH_GBE_STAT(rx_alloc_buff_failed),
+	PCH_GBE_STAT(tx_length_errors),
+	PCH_GBE_STAT(tx_aborted_errors),
+	PCH_GBE_STAT(tx_carrier_errors),
+	PCH_GBE_STAT(tx_timeout_count),
+	PCH_GBE_STAT(tx_restart_count),
+	PCH_GBE_STAT(intr_rx_dsc_empty_count),
+	PCH_GBE_STAT(intr_rx_frame_err_count),
+	PCH_GBE_STAT(intr_rx_fifo_err_count),
+	PCH_GBE_STAT(intr_rx_dma_err_count),
+	PCH_GBE_STAT(intr_tx_fifo_err_count),
+	PCH_GBE_STAT(intr_tx_dma_err_count),
+	PCH_GBE_STAT(intr_tcpip_err_count)
+};
+
+#define PCH_GBE_QUEUE_STATS_LEN 0
+#define PCH_GBE_GLOBAL_STATS_LEN	ARRAY_SIZE(pch_gbe_gstrings_stats)
+#define PCH_GBE_STATS_LEN (PCH_GBE_GLOBAL_STATS_LEN + PCH_GBE_QUEUE_STATS_LEN)
+
+#define PCH_GBE_MAC_REGS_LEN    (sizeof(struct pch_gbe_regs) / 4)
+#define PCH_GBE_REGS_LEN        (PCH_GBE_MAC_REGS_LEN + PCH_GBE_PHY_REGS_LEN)
+/**
+ * pch_gbe_get_settings - Get device-specific settings
+ * @netdev: Network interface device structure
+ * @ecmd:   Ethtool command
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_get_settings(struct net_device *netdev,
+				 struct ethtool_cmd *ecmd)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	int ret;
+
+	ret = mii_ethtool_gset(&adapter->mii, ecmd);
+	ecmd->supported &= ~(SUPPORTED_TP | SUPPORTED_1000baseT_Half);
+	ecmd->advertising &= ~(ADVERTISED_TP | ADVERTISED_1000baseT_Half);
+
+	if (!netif_carrier_ok(adapter->netdev))
+		ecmd->speed = -1;
+	return ret;
+}
+
+/**
+ * pch_gbe_set_settings - Set device-specific settings
+ * @netdev: Network interface device structure
+ * @ecmd:   Ethtool command
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_settings(struct net_device *netdev,
+				 struct ethtool_cmd *ecmd)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_hw *hw = &adapter->hw;
+	int ret;
+
+	pch_gbe_hal_write_phy_reg(hw, MII_BMCR, BMCR_RESET);
+
+	if (ecmd->speed == -1)
+		ecmd->speed = SPEED_1000;
+		ecmd->duplex = DUPLEX_FULL;
+	ret = mii_ethtool_sset(&adapter->mii, ecmd);
+	if (ret) {
+		pr_err("Error: mii_ethtool_sset\n");
+		return ret;
+	}
+	hw->mac.link_speed = ecmd->speed;
+	hw->mac.link_duplex = ecmd->duplex;
+	hw->phy.autoneg_advertised = ecmd->advertising;
+	hw->mac.autoneg = ecmd->autoneg;
+	pch_gbe_hal_phy_sw_reset(hw);
+
+	/* reset the link */
+	if (netif_running(adapter->netdev)) {
+		pch_gbe_down(adapter);
+		ret = pch_gbe_up(adapter);
+	} else {
+		pch_gbe_reset(adapter);
+	}
+	return ret;
+}
+
+/**
+ * pch_gbe_get_regs_len - Report the size of device registers
+ * @netdev: Network interface device structure
+ * Returns: the size of device registers.
+ */
+static int pch_gbe_get_regs_len(struct net_device *netdev)
+{
+	return PCH_GBE_REGS_LEN * (int)sizeof(u32);
+}
+
+/**
+ * pch_gbe_get_drvinfo - Report driver information
+ * @netdev:  Network interface device structure
+ * @drvinfo: Driver information structure
+ */
+static void pch_gbe_get_drvinfo(struct net_device *netdev,
+				 struct ethtool_drvinfo *drvinfo)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	strcpy(drvinfo->driver, KBUILD_MODNAME);
+	strcpy(drvinfo->version, pch_driver_version);
+	strcpy(drvinfo->fw_version, "N/A");
+	strcpy(drvinfo->bus_info, pci_name(adapter->pdev));
+	drvinfo->regdump_len = pch_gbe_get_regs_len(netdev);
+}
+
+/**
+ * pch_gbe_get_regs - Get device registers
+ * @netdev: Network interface device structure
+ * @regs:   Ethtool register structure
+ * @p:      Buffer pointer of read device register date
+ */
+static void pch_gbe_get_regs(struct net_device *netdev,
+				struct ethtool_regs *regs, void *p)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_hw *hw = &adapter->hw;
+	struct pci_dev *pdev = adapter->pdev;
+	u32 *regs_buff = p;
+	u16 i, tmp;
+
+	regs->version = 0x1000000 | (__u32)pdev->revision << 16 | pdev->device;
+	for (i = 0; i < PCH_GBE_MAC_REGS_LEN; i++)
+		*regs_buff++ = ioread32(&hw->reg->INT_ST + i);
+	/* PHY register */
+	for (i = 0; i < PCH_GBE_PHY_REGS_LEN; i++) {
+		pch_gbe_hal_read_phy_reg(&adapter->hw, i, &tmp);
+		*regs_buff++ = tmp;
+	}
+}
+
+/**
+ * pch_gbe_get_wol - Report whether Wake-on-Lan is enabled
+ * @netdev: Network interface device structure
+ * @wol:    Wake-on-Lan information
+ */
+static void pch_gbe_get_wol(struct net_device *netdev,
+				struct ethtool_wolinfo *wol)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	wol->supported = WAKE_UCAST | WAKE_MCAST | WAKE_BCAST | WAKE_MAGIC;
+	wol->wolopts = 0;
+
+	if ((adapter->wake_up_evt & PCH_GBE_WLC_IND))
+		wol->wolopts |= WAKE_UCAST;
+	if ((adapter->wake_up_evt & PCH_GBE_WLC_MLT))
+		wol->wolopts |= WAKE_MCAST;
+	if ((adapter->wake_up_evt & PCH_GBE_WLC_BR))
+		wol->wolopts |= WAKE_BCAST;
+	if ((adapter->wake_up_evt & PCH_GBE_WLC_MP))
+		wol->wolopts |= WAKE_MAGIC;
+}
+
+/**
+ * pch_gbe_set_wol - Turn Wake-on-Lan on or off
+ * @netdev: Network interface device structure
+ * @wol:    Pointer of wake-on-Lan information straucture
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_wol(struct net_device *netdev,
+				struct ethtool_wolinfo *wol)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	if ((wol->wolopts & (WAKE_PHY | WAKE_ARP | WAKE_MAGICSECURE)))
+		return -EOPNOTSUPP;
+	/* these settings will always override what we currently have */
+	adapter->wake_up_evt = 0;
+
+	if ((wol->wolopts & WAKE_UCAST))
+		adapter->wake_up_evt |= PCH_GBE_WLC_IND;
+	if ((wol->wolopts & WAKE_MCAST))
+		adapter->wake_up_evt |= PCH_GBE_WLC_MLT;
+	if ((wol->wolopts & WAKE_BCAST))
+		adapter->wake_up_evt |= PCH_GBE_WLC_BR;
+	if ((wol->wolopts & WAKE_MAGIC))
+		adapter->wake_up_evt |= PCH_GBE_WLC_MP;
+	return 0;
+}
+
+/**
+ * pch_gbe_nway_reset - Restart autonegotiation
+ * @netdev: Network interface device structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_nway_reset(struct net_device *netdev)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	return mii_nway_restart(&adapter->mii);
+}
+
+/**
+ * pch_gbe_get_ringparam - Report ring sizes
+ * @netdev:  Network interface device structure
+ * @ring:    Ring param structure
+ */
+static void pch_gbe_get_ringparam(struct net_device *netdev,
+					struct ethtool_ringparam *ring)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_tx_ring *txdr = adapter->tx_ring;
+	struct pch_gbe_rx_ring *rxdr = adapter->rx_ring;
+
+	ring->rx_max_pending = PCH_GBE_MAX_RXD;
+	ring->tx_max_pending = PCH_GBE_MAX_TXD;
+	ring->rx_mini_max_pending = 0;
+	ring->rx_jumbo_max_pending = 0;
+	ring->rx_pending = rxdr->count;
+	ring->tx_pending = txdr->count;
+	ring->rx_mini_pending = 0;
+	ring->rx_jumbo_pending = 0;
+}
+
+/**
+ * pch_gbe_set_ringparam - Set ring sizes
+ * @netdev:  Network interface device structure
+ * @ring:    Ring param structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_ringparam(struct net_device *netdev,
+					struct ethtool_ringparam *ring)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_tx_ring *txdr, *tx_old;
+	struct pch_gbe_rx_ring *rxdr, *rx_old;
+	int tx_ring_size, rx_ring_size;
+	int err = 0;
+
+	if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
+		return -EINVAL;
+	tx_ring_size = (int)sizeof(struct pch_gbe_tx_ring);
+	rx_ring_size = (int)sizeof(struct pch_gbe_rx_ring);
+
+	if ((netif_running(adapter->netdev)))
+		pch_gbe_down(adapter);
+	tx_old = adapter->tx_ring;
+	rx_old = adapter->rx_ring;
+
+	txdr = kzalloc(tx_ring_size, GFP_KERNEL);
+	if (!txdr) {
+		err = -ENOMEM;
+		goto err_alloc_tx;
+	}
+	rxdr = kzalloc(rx_ring_size, GFP_KERNEL);
+	if (!rxdr) {
+		err = -ENOMEM;
+		goto err_alloc_rx;
+	}
+	adapter->tx_ring = txdr;
+	adapter->rx_ring = rxdr;
+
+	rxdr->count =
+		clamp_val(ring->rx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
+	rxdr->count = roundup(rxdr->count, PCH_GBE_RX_DESC_MULTIPLE);
+
+	txdr->count =
+		clamp_val(ring->tx_pending, PCH_GBE_MIN_RXD, PCH_GBE_MAX_RXD);
+	txdr->count = roundup(txdr->count, PCH_GBE_TX_DESC_MULTIPLE);
+
+	if ((netif_running(adapter->netdev))) {
+		/* Try to get new resources before deleting old */
+		err = pch_gbe_setup_rx_resources(adapter, adapter->rx_ring);
+		if (err)
+			goto err_setup_rx;
+		err = pch_gbe_setup_tx_resources(adapter, adapter->tx_ring);
+		if (err)
+			goto err_setup_tx;
+		/* save the new, restore the old in order to free it,
+		 * then restore the new back again */
+#ifdef RINGFREE
+		adapter->rx_ring = rx_old;
+		adapter->tx_ring = tx_old;
+		pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
+		pch_gbe_free_tx_resources(adapter, adapter->tx_ring);
+		kfree(tx_old);
+		kfree(rx_old);
+		adapter->rx_ring = rxdr;
+		adapter->tx_ring = txdr;
+#else
+		pch_gbe_free_rx_resources(adapter, rx_old);
+		pch_gbe_free_tx_resources(adapter, tx_old);
+		kfree(tx_old);
+		kfree(rx_old);
+		adapter->rx_ring = rxdr;
+		adapter->tx_ring = txdr;
+#endif
+		err = pch_gbe_up(adapter);
+	}
+	return err;
+
+err_setup_tx:
+	pch_gbe_free_rx_resources(adapter, adapter->rx_ring);
+err_setup_rx:
+	adapter->rx_ring = rx_old;
+	adapter->tx_ring = tx_old;
+	kfree(rxdr);
+err_alloc_rx:
+	kfree(txdr);
+err_alloc_tx:
+	if (netif_running(adapter->netdev))
+		pch_gbe_up(adapter);
+	return err;
+}
+
+/**
+ * pch_gbe_get_pauseparam - Report pause parameters
+ * @netdev:  Network interface device structure
+ * @pause:   Pause parameters structure
+ */
+static void pch_gbe_get_pauseparam(struct net_device *netdev,
+				       struct ethtool_pauseparam *pause)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_hw *hw = &adapter->hw;
+
+	pause->autoneg =
+	    ((hw->mac.fc_autoneg) ? AUTONEG_ENABLE : AUTONEG_DISABLE);
+
+	if (hw->mac.fc == PCH_GBE_FC_RX_PAUSE) {
+		pause->rx_pause = 1;
+	} else if (hw->mac.fc == PCH_GBE_FC_TX_PAUSE) {
+		pause->tx_pause = 1;
+	} else if (hw->mac.fc == PCH_GBE_FC_FULL) {
+		pause->rx_pause = 1;
+		pause->tx_pause = 1;
+	}
+}
+
+/**
+ * pch_gbe_set_pauseparam - Set pause paramters
+ * @netdev:  Network interface device structure
+ * @pause:   Pause parameters structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_pauseparam(struct net_device *netdev,
+				       struct ethtool_pauseparam *pause)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	struct pch_gbe_hw *hw = &adapter->hw;
+	int ret = 0;
+
+	hw->mac.fc_autoneg = pause->autoneg;
+	if ((pause->rx_pause) && (pause->tx_pause))
+		hw->mac.fc = PCH_GBE_FC_FULL;
+	else if ((pause->rx_pause) && (!pause->tx_pause))
+		hw->mac.fc = PCH_GBE_FC_RX_PAUSE;
+	else if ((!pause->rx_pause) && (pause->tx_pause))
+		hw->mac.fc = PCH_GBE_FC_TX_PAUSE;
+	else if ((!pause->rx_pause) && (!pause->tx_pause))
+		hw->mac.fc = PCH_GBE_FC_NONE;
+
+	if (hw->mac.fc_autoneg == AUTONEG_ENABLE) {
+		if ((netif_running(adapter->netdev))) {
+			pch_gbe_down(adapter);
+			ret = pch_gbe_up(adapter);
+		} else {
+			pch_gbe_reset(adapter);
+		}
+	} else {
+		ret = pch_gbe_mac_force_mac_fc(hw);
+	}
+	return ret;
+}
+
+/**
+ * pch_gbe_get_rx_csum - Report whether receive checksums are turned on or off
+ * @netdev:  Network interface device structure
+ * Returns
+ *	true(1):  Checksum On
+ *	false(0): Checksum Off
+ */
+static u32 pch_gbe_get_rx_csum(struct net_device *netdev)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	return adapter->rx_csum;
+}
+
+/**
+ * pch_gbe_set_rx_csum - Turn receive checksum on or off
+ * @netdev:  Network interface device structure
+ * @data:    Checksum On[true] or Off[false]
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_rx_csum(struct net_device *netdev, u32 data)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	adapter->rx_csum = data;
+	if ((netif_running(netdev)))
+		pch_gbe_reinit_locked(adapter);
+	else
+		pch_gbe_reset(adapter);
+
+	return 0;
+}
+
+/**
+ * pch_gbe_get_tx_csum - Report whether transmit checksums are turned on or off
+ * @netdev:  Network interface device structure
+ * Returns
+ *	true(1):  Checksum On
+ *	false(0): Checksum Off
+ */
+static u32 pch_gbe_get_tx_csum(struct net_device *netdev)
+{
+	return (netdev->features & NETIF_F_HW_CSUM) != 0;
+}
+
+/**
+ * pch_gbe_set_tx_csum - Turn transmit checksums on or off
+ * @netdev: Network interface device structure
+ * @data:   Checksum on[true] or off[false]
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_set_tx_csum(struct net_device *netdev, u32 data)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+
+	adapter->tx_csum = data;
+	if (data)
+		netdev->features |= NETIF_F_HW_CSUM;
+	else
+		netdev->features &= ~NETIF_F_HW_CSUM;
+	return 0;
+}
+
+/**
+ * pch_gbe_get_strings - Return a set of strings that describe the requested
+ *			 objects
+ * @netdev:    Network interface device structure
+ * @stringset: Select the stringset. [ETH_SS_TEST] [ETH_SS_STATS]
+ * @data:      Pointer of read string data.
+ */
+static void pch_gbe_get_strings(struct net_device *netdev, u32 stringset,
+					u8 *data)
+{
+	u8 *p = data;
+	int i;
+
+	switch (stringset) {
+	case (u32) ETH_SS_STATS:
+		for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
+			memcpy(p, pch_gbe_gstrings_stats[i].string,
+			       ETH_GSTRING_LEN);
+			p += ETH_GSTRING_LEN;
+		}
+		break;
+	}
+}
+
+/**
+ * pch_gbe_get_ethtool_stats - Return statistics about the device
+ * @netdev: Network interface device structure
+ * @stats:  Ethtool statue structure
+ * @data:   Pointer of read status area
+ */
+static void pch_gbe_get_ethtool_stats(struct net_device *netdev,
+				  struct ethtool_stats *stats, u64 *data)
+{
+	struct pch_gbe_adapter *adapter = netdev_priv(netdev);
+	int i;
+	const struct pch_gbe_stats *gstats = pch_gbe_gstrings_stats;
+	char *hw_stats = (char *)&adapter->stats;
+
+	pch_gbe_update_stats(adapter);
+	for (i = 0; i < PCH_GBE_GLOBAL_STATS_LEN; i++) {
+		char *p = hw_stats + gstats->offset;
+		data[i] = gstats->size == sizeof(u64) ? *(u64 *)p:(*(u32 *)p);
+		gstats++;
+	}
+}
+
+static int pch_gbe_get_sset_count(struct net_device *netdev, int sset)
+{
+	switch (sset) {
+	case ETH_SS_STATS:
+		return PCH_GBE_STATS_LEN;
+	default:
+		return -EOPNOTSUPP;
+	}
+}
+
+static const struct ethtool_ops pch_gbe_ethtool_ops = {
+	.get_settings = pch_gbe_get_settings,
+	.set_settings = pch_gbe_set_settings,
+	.get_drvinfo = pch_gbe_get_drvinfo,
+	.get_regs_len = pch_gbe_get_regs_len,
+	.get_regs = pch_gbe_get_regs,
+	.get_wol = pch_gbe_get_wol,
+	.set_wol = pch_gbe_set_wol,
+	.nway_reset = pch_gbe_nway_reset,
+	.get_link = ethtool_op_get_link,
+	.get_ringparam = pch_gbe_get_ringparam,
+	.set_ringparam = pch_gbe_set_ringparam,
+	.get_pauseparam = pch_gbe_get_pauseparam,
+	.set_pauseparam = pch_gbe_set_pauseparam,
+	.get_rx_csum = pch_gbe_get_rx_csum,
+	.set_rx_csum = pch_gbe_set_rx_csum,
+	.get_tx_csum = pch_gbe_get_tx_csum,
+	.set_tx_csum = pch_gbe_set_tx_csum,
+	.get_strings = pch_gbe_get_strings,
+	.get_ethtool_stats = pch_gbe_get_ethtool_stats,
+	.get_sset_count = pch_gbe_get_sset_count,
+};
+
+void pch_gbe_set_ethtool_ops(struct net_device *netdev)
+{
+	SET_ETHTOOL_OPS(netdev, &pch_gbe_ethtool_ops);
+}

drivers/net/pch_gbe/pch_gbe_param.c

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "pch_gbe.h"
+
+#define OPTION_UNSET   -1
+#define OPTION_DISABLED 0
+#define OPTION_ENABLED  1
+
+/**
+ * TxDescriptors - Transmit Descriptor Count
+ * @Valid Range:   PCH_GBE_MIN_TXD - PCH_GBE_MAX_TXD
+ * @Default Value: PCH_GBE_DEFAULT_TXD
+ */
+static int TxDescriptors = OPTION_UNSET;
+module_param(TxDescriptors, int, 0);
+MODULE_PARM_DESC(TxDescriptors, "Number of transmit descriptors");
+
+/**
+ * RxDescriptors -Receive Descriptor Count
+ * @Valid Range:   PCH_GBE_MIN_RXD - PCH_GBE_MAX_RXD
+ * @Default Value: PCH_GBE_DEFAULT_RXD
+ */
+static int RxDescriptors = OPTION_UNSET;
+module_param(RxDescriptors, int, 0);
+MODULE_PARM_DESC(RxDescriptors, "Number of receive descriptors");
+
+/**
+ * Speed - User Specified Speed Override
+ * @Valid Range: 0, 10, 100, 1000
+ *   - 0:    auto-negotiate at all supported speeds
+ *   - 10:   only link at 10 Mbps
+ *   - 100:  only link at 100 Mbps
+ *   - 1000: only link at 1000 Mbps
+ * @Default Value: 0
+ */
+static int Speed = OPTION_UNSET;
+module_param(Speed, int, 0);
+MODULE_PARM_DESC(Speed, "Speed setting");
+
+/**
+ * Duplex - User Specified Duplex Override
+ * @Valid Range: 0-2
+ *   - 0:  auto-negotiate for duplex
+ *   - 1:  only link at half duplex
+ *   - 2:  only link at full duplex
+ * @Default Value: 0
+ */
+static int Duplex = OPTION_UNSET;
+module_param(Duplex, int, 0);
+MODULE_PARM_DESC(Duplex, "Duplex setting");
+
+#define HALF_DUPLEX 1
+#define FULL_DUPLEX 2
+
+/**
+ * AutoNeg - Auto-negotiation Advertisement Override
+ * @Valid Range: 0x01-0x0F, 0x20-0x2F
+ *
+ *       The AutoNeg value is a bit mask describing which speed and duplex
+ *       combinations should be advertised during auto-negotiation.
+ *       The supported speed and duplex modes are listed below
+ *
+ *       Bit           7     6     5      4      3     2     1      0
+ *       Speed (Mbps)  N/A   N/A   1000   N/A    100   100   10     10
+ *       Duplex                    Full          Full  Half  Full   Half
+ *
+ * @Default Value: 0x2F (copper)
+ */
+static int AutoNeg = OPTION_UNSET;
+module_param(AutoNeg, int, 0);
+MODULE_PARM_DESC(AutoNeg, "Advertised auto-negotiation setting");
+
+#define PHY_ADVERTISE_10_HALF      0x0001
+#define PHY_ADVERTISE_10_FULL      0x0002
+#define PHY_ADVERTISE_100_HALF     0x0004
+#define PHY_ADVERTISE_100_FULL     0x0008
+#define PHY_ADVERTISE_1000_HALF    0x0010 /* Not used, just FYI */
+#define PHY_ADVERTISE_1000_FULL    0x0020
+#define PCH_AUTONEG_ADVERTISE_DEFAULT   0x2F
+
+/**
+ * FlowControl - User Specified Flow Control Override
+ * @Valid Range: 0-3
+ *    - 0:  No Flow Control
+ *    - 1:  Rx only, respond to PAUSE frames but do not generate them
+ *    - 2:  Tx only, generate PAUSE frames but ignore them on receive
+ *    - 3:  Full Flow Control Support
+ * @Default Value: Read flow control settings from the EEPROM
+ */
+static int FlowControl = OPTION_UNSET;
+module_param(FlowControl, int, 0);
+MODULE_PARM_DESC(FlowControl, "Flow Control setting");
+
+/*
+ * XsumRX - Receive Checksum Offload Enable/Disable
+ * @Valid Range: 0, 1
+ *    - 0:  disables all checksum offload
+ *    - 1:  enables receive IP/TCP/UDP checksum offload
+ * @Default Value: PCH_GBE_DEFAULT_RX_CSUM
+ */
+static int XsumRX = OPTION_UNSET;
+module_param(XsumRX, int, 0);
+MODULE_PARM_DESC(XsumRX, "Disable or enable Receive Checksum offload");
+
+#define PCH_GBE_DEFAULT_RX_CSUM             true	/* trueorfalse */
+
+/*
+ * XsumTX - Transmit Checksum Offload Enable/Disable
+ * @Valid Range: 0, 1
+ *    - 0:  disables all checksum offload
+ *    - 1:  enables transmit IP/TCP/UDP checksum offload
+ * @Default Value: PCH_GBE_DEFAULT_TX_CSUM
+ */
+static int XsumTX = OPTION_UNSET;
+module_param(XsumTX, int, 0);
+MODULE_PARM_DESC(XsumTX, "Disable or enable Transmit Checksum offload");
+
+#define PCH_GBE_DEFAULT_TX_CSUM             true	/* trueorfalse */
+
+/**
+ * pch_gbe_option - Force the MAC's flow control settings
+ * @hw:	            Pointer to the HW structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+struct pch_gbe_option {
+	enum { enable_option, range_option, list_option } type;
+	char *name;
+	char *err;
+	int  def;
+	union {
+		struct { /* range_option info */
+			int min;
+			int max;
+		} r;
+		struct { /* list_option info */
+			int nr;
+			const struct pch_gbe_opt_list { int i; char *str; } *p;
+		} l;
+	} arg;
+};
+
+static const struct pch_gbe_opt_list speed_list[] = {
+	{ 0, "" },
+	{ SPEED_10, "" },
+	{ SPEED_100, "" },
+	{ SPEED_1000, "" }
+};
+
+static const struct pch_gbe_opt_list dplx_list[] = {
+	{ 0, "" },
+	{ HALF_DUPLEX, "" },
+	{ FULL_DUPLEX, "" }
+};
+
+static const struct pch_gbe_opt_list an_list[] =
+	#define AA "AutoNeg advertising "
+	{{ 0x01, AA "10/HD" },
+	 { 0x02, AA "10/FD" },
+	 { 0x03, AA "10/FD, 10/HD" },
+	 { 0x04, AA "100/HD" },
+	 { 0x05, AA "100/HD, 10/HD" },
+	 { 0x06, AA "100/HD, 10/FD" },
+	 { 0x07, AA "100/HD, 10/FD, 10/HD" },
+	 { 0x08, AA "100/FD" },
+	 { 0x09, AA "100/FD, 10/HD" },
+	 { 0x0a, AA "100/FD, 10/FD" },
+	 { 0x0b, AA "100/FD, 10/FD, 10/HD" },
+	 { 0x0c, AA "100/FD, 100/HD" },
+	 { 0x0d, AA "100/FD, 100/HD, 10/HD" },
+	 { 0x0e, AA "100/FD, 100/HD, 10/FD" },
+	 { 0x0f, AA "100/FD, 100/HD, 10/FD, 10/HD" },
+	 { 0x20, AA "1000/FD" },
+	 { 0x21, AA "1000/FD, 10/HD" },
+	 { 0x22, AA "1000/FD, 10/FD" },
+	 { 0x23, AA "1000/FD, 10/FD, 10/HD" },
+	 { 0x24, AA "1000/FD, 100/HD" },
+	 { 0x25, AA "1000/FD, 100/HD, 10/HD" },
+	 { 0x26, AA "1000/FD, 100/HD, 10/FD" },
+	 { 0x27, AA "1000/FD, 100/HD, 10/FD, 10/HD" },
+	 { 0x28, AA "1000/FD, 100/FD" },
+	 { 0x29, AA "1000/FD, 100/FD, 10/HD" },
+	 { 0x2a, AA "1000/FD, 100/FD, 10/FD" },
+	 { 0x2b, AA "1000/FD, 100/FD, 10/FD, 10/HD" },
+	 { 0x2c, AA "1000/FD, 100/FD, 100/HD" },
+	 { 0x2d, AA "1000/FD, 100/FD, 100/HD, 10/HD" },
+	 { 0x2e, AA "1000/FD, 100/FD, 100/HD, 10/FD" },
+	 { 0x2f, AA "1000/FD, 100/FD, 100/HD, 10/FD, 10/HD" }
+};
+
+static const struct pch_gbe_opt_list fc_list[] = {
+	{ PCH_GBE_FC_NONE, "Flow Control Disabled" },
+	{ PCH_GBE_FC_RX_PAUSE, "Flow Control Receive Only" },
+	{ PCH_GBE_FC_TX_PAUSE, "Flow Control Transmit Only" },
+	{ PCH_GBE_FC_FULL, "Flow Control Enabled" }
+};
+
+/**
+ * pch_gbe_validate_option - Validate option
+ * @value:    value
+ * @opt:      option
+ * @adapter:  Board private structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+static int pch_gbe_validate_option(int *value,
+				    const struct pch_gbe_option *opt,
+				    struct pch_gbe_adapter *adapter)
+{
+	if (*value == OPTION_UNSET) {
+		*value = opt->def;
+		return 0;
+	}
+
+	switch (opt->type) {
+	case enable_option:
+		switch (*value) {
+		case OPTION_ENABLED:
+			pr_debug("%s Enabled\n", opt->name);
+			return 0;
+		case OPTION_DISABLED:
+			pr_debug("%s Disabled\n", opt->name);
+			return 0;
+		}
+		break;
+	case range_option:
+		if (*value >= opt->arg.r.min && *value <= opt->arg.r.max) {
+			pr_debug("%s set to %i\n", opt->name, *value);
+			return 0;
+		}
+		break;
+	case list_option: {
+		int i;
+		const struct pch_gbe_opt_list *ent;
+
+		for (i = 0; i < opt->arg.l.nr; i++) {
+			ent = &opt->arg.l.p[i];
+			if (*value == ent->i) {
+				if (ent->str[0] != '\0')
+					pr_debug("%s\n", ent->str);
+				return 0;
+			}
+		}
+	}
+		break;
+	default:
+		BUG();
+	}
+
+	pr_debug("Invalid %s value specified (%i) %s\n",
+		 opt->name, *value, opt->err);
+	*value = opt->def;
+	return -1;
+}
+
+/**
+ * pch_gbe_check_copper_options - Range Checking for Link Options, Copper Version
+ * @adapter:  Board private structure
+ */
+static void pch_gbe_check_copper_options(struct pch_gbe_adapter *adapter)
+{
+	struct pch_gbe_hw *hw = &adapter->hw;
+	int speed, dplx;
+
+	{ /* Speed */
+		static const struct pch_gbe_option opt = {
+			.type = list_option,
+			.name = "Speed",
+			.err  = "parameter ignored",
+			.def  = 0,
+			.arg  = { .l = { .nr = (int)ARRAY_SIZE(speed_list),
+					 .p = speed_list } }
+		};
+		speed = Speed;
+		pch_gbe_validate_option(&speed, &opt, adapter);
+	}
+	{ /* Duplex */
+		static const struct pch_gbe_option opt = {
+			.type = list_option,
+			.name = "Duplex",
+			.err  = "parameter ignored",
+			.def  = 0,
+			.arg  = { .l = { .nr = (int)ARRAY_SIZE(dplx_list),
+					 .p = dplx_list } }
+		};
+		dplx = Duplex;
+		pch_gbe_validate_option(&dplx, &opt, adapter);
+	}
+
+	{ /* Autoneg */
+		static const struct pch_gbe_option opt = {
+			.type = list_option,
+			.name = "AutoNeg",
+			.err  = "parameter ignored",
+			.def  = PCH_AUTONEG_ADVERTISE_DEFAULT,
+			.arg  = { .l = { .nr = (int)ARRAY_SIZE(an_list),
+					 .p = an_list} }
+		};
+		if (speed || dplx) {
+			pr_debug("AutoNeg specified along with Speed or Duplex, AutoNeg parameter ignored\n");
+			hw->phy.autoneg_advertised = opt.def;
+		} else {
+			hw->phy.autoneg_advertised = AutoNeg;
+			pch_gbe_validate_option(
+				(int *)(&hw->phy.autoneg_advertised),
+				&opt, adapter);
+		}
+	}
+
+	switch (speed + dplx) {
+	case 0:
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		if ((speed || dplx))
+			pr_debug("Speed and duplex autonegotiation enabled\n");
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case HALF_DUPLEX:
+		pr_debug("Half Duplex specified without Speed\n");
+		pr_debug("Using Autonegotiation at Half Duplex only\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		hw->phy.autoneg_advertised = PHY_ADVERTISE_10_HALF |
+						PHY_ADVERTISE_100_HALF;
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case FULL_DUPLEX:
+		pr_debug("Full Duplex specified without Speed\n");
+		pr_debug("Using Autonegotiation at Full Duplex only\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		hw->phy.autoneg_advertised = PHY_ADVERTISE_10_FULL |
+						PHY_ADVERTISE_100_FULL |
+						PHY_ADVERTISE_1000_FULL;
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_FULL;
+		break;
+	case SPEED_10:
+		pr_debug("10 Mbps Speed specified without Duplex\n");
+		pr_debug("Using Autonegotiation at 10 Mbps only\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		hw->phy.autoneg_advertised = PHY_ADVERTISE_10_HALF |
+						PHY_ADVERTISE_10_FULL;
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case SPEED_10 + HALF_DUPLEX:
+		pr_debug("Forcing to 10 Mbps Half Duplex\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 0;
+		hw->phy.autoneg_advertised = 0;
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case SPEED_10 + FULL_DUPLEX:
+		pr_debug("Forcing to 10 Mbps Full Duplex\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 0;
+		hw->phy.autoneg_advertised = 0;
+		hw->mac.link_speed = SPEED_10;
+		hw->mac.link_duplex = DUPLEX_FULL;
+		break;
+	case SPEED_100:
+		pr_debug("100 Mbps Speed specified without Duplex\n");
+		pr_debug("Using Autonegotiation at 100 Mbps only\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		hw->phy.autoneg_advertised = PHY_ADVERTISE_100_HALF |
+						PHY_ADVERTISE_100_FULL;
+		hw->mac.link_speed = SPEED_100;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case SPEED_100 + HALF_DUPLEX:
+		pr_debug("Forcing to 100 Mbps Half Duplex\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 0;
+		hw->phy.autoneg_advertised = 0;
+		hw->mac.link_speed = SPEED_100;
+		hw->mac.link_duplex = DUPLEX_HALF;
+		break;
+	case SPEED_100 + FULL_DUPLEX:
+		pr_debug("Forcing to 100 Mbps Full Duplex\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 0;
+		hw->phy.autoneg_advertised = 0;
+		hw->mac.link_speed = SPEED_100;
+		hw->mac.link_duplex = DUPLEX_FULL;
+		break;
+	case SPEED_1000:
+		pr_debug("1000 Mbps Speed specified without Duplex\n");
+		goto full_duplex_only;
+	case SPEED_1000 + HALF_DUPLEX:
+		pr_debug("Half Duplex is not supported at 1000 Mbps\n");
+		/* fall through */
+	case SPEED_1000 + FULL_DUPLEX:
+full_duplex_only:
+		pr_debug("Using Autonegotiation at 1000 Mbps Full Duplex only\n");
+		hw->mac.autoneg = hw->mac.fc_autoneg = 1;
+		hw->phy.autoneg_advertised = PHY_ADVERTISE_1000_FULL;
+		hw->mac.link_speed = SPEED_1000;
+		hw->mac.link_duplex = DUPLEX_FULL;
+		break;
+	default:
+		BUG();
+	}
+}
+
+/**
+ * pch_gbe_check_options - Range Checking for Command Line Parameters
+ * @adapter:  Board private structure
+ */
+void pch_gbe_check_options(struct pch_gbe_adapter *adapter)
+{
+	struct pch_gbe_hw *hw = &adapter->hw;
+
+	{ /* Transmit Descriptor Count */
+		static const struct pch_gbe_option opt = {
+			.type = range_option,
+			.name = "Transmit Descriptors",
+			.err  = "using default of "
+				__MODULE_STRING(PCH_GBE_DEFAULT_TXD),
+			.def  = PCH_GBE_DEFAULT_TXD,
+			.arg  = { .r = { .min = PCH_GBE_MIN_TXD } },
+			.arg  = { .r = { .max = PCH_GBE_MAX_TXD } }
+		};
+		struct pch_gbe_tx_ring *tx_ring = adapter->tx_ring;
+		tx_ring->count = TxDescriptors;
+		pch_gbe_validate_option(&tx_ring->count, &opt, adapter);
+		tx_ring->count = roundup(tx_ring->count,
+					PCH_GBE_TX_DESC_MULTIPLE);
+	}
+	{ /* Receive Descriptor Count */
+		static const struct pch_gbe_option opt = {
+			.type = range_option,
+			.name = "Receive Descriptors",
+			.err  = "using default of "
+				__MODULE_STRING(PCH_GBE_DEFAULT_RXD),
+			.def  = PCH_GBE_DEFAULT_RXD,
+			.arg  = { .r = { .min = PCH_GBE_MIN_RXD } },
+			.arg  = { .r = { .max = PCH_GBE_MAX_RXD } }
+		};
+		struct pch_gbe_rx_ring *rx_ring = adapter->rx_ring;
+		rx_ring->count = RxDescriptors;
+		pch_gbe_validate_option(&rx_ring->count, &opt, adapter);
+		rx_ring->count = roundup(rx_ring->count,
+				PCH_GBE_RX_DESC_MULTIPLE);
+	}
+	{ /* Checksum Offload Enable/Disable */
+		static const struct pch_gbe_option opt = {
+			.type = enable_option,
+			.name = "Checksum Offload",
+			.err  = "defaulting to Enabled",
+			.def  = PCH_GBE_DEFAULT_RX_CSUM
+		};
+		adapter->rx_csum = XsumRX;
+		pch_gbe_validate_option((int *)(&adapter->rx_csum),
+					&opt, adapter);
+	}
+	{ /* Checksum Offload Enable/Disable */
+		static const struct pch_gbe_option opt = {
+			.type = enable_option,
+			.name = "Checksum Offload",
+			.err  = "defaulting to Enabled",
+			.def  = PCH_GBE_DEFAULT_TX_CSUM
+		};
+		adapter->tx_csum = XsumTX;
+		pch_gbe_validate_option((int *)(&adapter->tx_csum),
+						&opt, adapter);
+	}
+	{ /* Flow Control */
+		static const struct pch_gbe_option opt = {
+			.type = list_option,
+			.name = "Flow Control",
+			.err  = "reading default settings from EEPROM",
+			.def  = PCH_GBE_FC_DEFAULT,
+			.arg  = { .l = { .nr = (int)ARRAY_SIZE(fc_list),
+					 .p = fc_list } }
+		};
+		hw->mac.fc = FlowControl;
+		pch_gbe_validate_option((int *)(&hw->mac.fc),
+						&opt, adapter);
+	}
+
+	pch_gbe_check_copper_options(adapter);
+}

drivers/net/pch_gbe/pch_gbe_phy.c

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#include "pch_gbe.h"
+#include "pch_gbe_phy.h"
+
+#define PHY_MAX_REG_ADDRESS   0x1F	/* 5 bit address bus (0-0x1F) */
+
+/* PHY 1000 MII Register/Bit Definitions */
+/* PHY Registers defined by IEEE */
+#define PHY_CONTROL           0x00  /* Control Register */
+#define PHY_STATUS            0x01  /* Status Regiser */
+#define PHY_ID1               0x02  /* Phy Id Register (word 1) */
+#define PHY_ID2               0x03  /* Phy Id Register (word 2) */
+#define PHY_AUTONEG_ADV       0x04  /* Autoneg Advertisement */
+#define PHY_LP_ABILITY        0x05  /* Link Partner Ability (Base Page) */
+#define PHY_AUTONEG_EXP       0x06  /* Autoneg Expansion Register */
+#define PHY_NEXT_PAGE_TX      0x07  /* Next Page TX */
+#define PHY_LP_NEXT_PAGE      0x08  /* Link Partner Next Page */
+#define PHY_1000T_CTRL        0x09  /* 1000Base-T Control Register */
+#define PHY_1000T_STATUS      0x0A  /* 1000Base-T Status Register */
+#define PHY_EXT_STATUS        0x0F  /* Extended Status Register */
+#define PHY_PHYSP_CONTROL     0x10  /* PHY Specific Control Register */
+#define PHY_EXT_PHYSP_CONTROL 0x14  /* Extended PHY Specific Control Register */
+#define PHY_LED_CONTROL       0x18  /* LED Control Register */
+#define PHY_EXT_PHYSP_STATUS  0x1B  /* Extended PHY Specific Status Register */
+
+/* PHY Control Register */
+#define MII_CR_SPEED_SELECT_MSB 0x0040	/* bits 6,13: 10=1000, 01=100, 00=10 */
+#define MII_CR_COLL_TEST_ENABLE 0x0080	/* Collision test enable */
+#define MII_CR_FULL_DUPLEX      0x0100	/* FDX =1, half duplex =0 */
+#define MII_CR_RESTART_AUTO_NEG 0x0200	/* Restart auto negotiation */
+#define MII_CR_ISOLATE          0x0400	/* Isolate PHY from MII */
+#define MII_CR_POWER_DOWN       0x0800	/* Power down */
+#define MII_CR_AUTO_NEG_EN      0x1000	/* Auto Neg Enable */
+#define MII_CR_SPEED_SELECT_LSB 0x2000	/* bits 6,13: 10=1000, 01=100, 00=10 */
+#define MII_CR_LOOPBACK         0x4000	/* 0 = normal, 1 = loopback */
+#define MII_CR_RESET            0x8000	/* 0 = normal, 1 = PHY reset */
+#define MII_CR_SPEED_1000       0x0040
+#define MII_CR_SPEED_100        0x2000
+#define MII_CR_SPEED_10         0x0000
+
+/* PHY Status Register */
+#define MII_SR_EXTENDED_CAPS     0x0001	/* Extended register capabilities */
+#define MII_SR_JABBER_DETECT     0x0002	/* Jabber Detected */
+#define MII_SR_LINK_STATUS       0x0004	/* Link Status 1 = link */
+#define MII_SR_AUTONEG_CAPS      0x0008	/* Auto Neg Capable */
+#define MII_SR_REMOTE_FAULT      0x0010	/* Remote Fault Detect */
+#define MII_SR_AUTONEG_COMPLETE  0x0020	/* Auto Neg Complete */
+#define MII_SR_PREAMBLE_SUPPRESS 0x0040	/* Preamble may be suppressed */
+#define MII_SR_EXTENDED_STATUS   0x0100	/* Ext. status info in Reg 0x0F */
+#define MII_SR_100T2_HD_CAPS     0x0200	/* 100T2 Half Duplex Capable */
+#define MII_SR_100T2_FD_CAPS     0x0400	/* 100T2 Full Duplex Capable */
+#define MII_SR_10T_HD_CAPS       0x0800	/* 10T   Half Duplex Capable */
+#define MII_SR_10T_FD_CAPS       0x1000	/* 10T   Full Duplex Capable */
+#define MII_SR_100X_HD_CAPS      0x2000	/* 100X  Half Duplex Capable */
+#define MII_SR_100X_FD_CAPS      0x4000	/* 100X  Full Duplex Capable */
+#define MII_SR_100T4_CAPS        0x8000	/* 100T4 Capable */
+
+/* Phy Id Register (word 2) */
+#define PHY_REVISION_MASK        0x000F
+
+/* PHY Specific Control Register */
+#define PHYSP_CTRL_ASSERT_CRS_TX  0x0800
+
+
+/* Default value of PHY register */
+#define PHY_CONTROL_DEFAULT         0x1140 /* Control Register */
+#define PHY_AUTONEG_ADV_DEFAULT     0x01e0 /* Autoneg Advertisement */
+#define PHY_NEXT_PAGE_TX_DEFAULT    0x2001 /* Next Page TX */
+#define PHY_1000T_CTRL_DEFAULT      0x0300 /* 1000Base-T Control Register */
+#define PHY_PHYSP_CONTROL_DEFAULT   0x01EE /* PHY Specific Control Register */
+
+/**
+ * pch_gbe_phy_get_id - Retrieve the PHY ID and revision
+ * @hw:	       Pointer to the HW structure
+ * Returns
+ *	0:			Successful.
+ *	Negative value:		Failed.
+ */
+s32 pch_gbe_phy_get_id(struct pch_gbe_hw *hw)
+{
+	struct pch_gbe_phy_info *phy = &hw->phy;
+	s32 ret;
+	u16 phy_id1;
+	u16 phy_id2;
+
+	ret = pch_gbe_phy_read_reg_miic(hw, PHY_ID1, &phy_id1);
+	if (ret)
+		return ret;
+	ret = pch_gbe_phy_read_reg_miic(hw, PHY_ID2, &phy_id2);
+	if (ret)
+		return ret;
+	/*
+	 * PHY_ID1: [bit15-0:ID(21-6)]
+	 * PHY_ID2: [bit15-10:ID(5-0)][bit9-4:Model][bit3-0:revision]
+	 */
+	phy->id = (u32)phy_id1;
+	phy->id = ((phy->id << 6) | ((phy_id2 & 0xFC00) >> 10));
+	phy->revision = (u32) (phy_id2 & 0x000F);
+	pr_debug("phy->id : 0x%08x  phy->revision : 0x%08x\n",
+		 phy->id, phy->revision);
+	return 0;
+}
+
+/**
+ * pch_gbe_phy_read_reg_miic - Read MII control register
+ * @hw:	     Pointer to the HW structure
+ * @offset:  Register offset to be read
+ * @data:    Pointer to the read data
+ * Returns
+ *	0:		Successful.
+ *	-EINVAL:	Invalid argument.
+ */
+s32 pch_gbe_phy_read_reg_miic(struct pch_gbe_hw *hw, u32 offset, u16 *data)
+{
+	struct pch_gbe_phy_info *phy = &hw->phy;
+
+	if (offset > PHY_MAX_REG_ADDRESS) {
+		pr_err("PHY Address %d is out of range\n", offset);
+		return -EINVAL;
+	}
+	*data = pch_gbe_mac_ctrl_miim(hw, phy->addr, PCH_GBE_HAL_MIIM_READ,
+				      offset, (u16)0);
+	return 0;
+}
+
+/**
+ * pch_gbe_phy_write_reg_miic - Write MII control register
+ * @hw:	     Pointer to the HW structure
+ * @offset:  Register offset to be read
+ * @data:    data to write to register at offset
+ * Returns
+ *	0:		Successful.
+ *	-EINVAL:	Invalid argument.
+ */
+s32 pch_gbe_phy_write_reg_miic(struct pch_gbe_hw *hw, u32 offset, u16 data)
+{
+	struct pch_gbe_phy_info *phy = &hw->phy;
+
+	if (offset > PHY_MAX_REG_ADDRESS) {
+		pr_err("PHY Address %d is out of range\n", offset);
+		return -EINVAL;
+	}
+	pch_gbe_mac_ctrl_miim(hw, phy->addr, PCH_GBE_HAL_MIIM_WRITE,
+				 offset, data);
+	return 0;
+}
+
+/**
+ * pch_gbe_phy_sw_reset - PHY software reset
+ * @hw:	            Pointer to the HW structure
+ */
+void pch_gbe_phy_sw_reset(struct pch_gbe_hw *hw)
+{
+	u16 phy_ctrl;
+
+	pch_gbe_phy_read_reg_miic(hw, PHY_CONTROL, &phy_ctrl);
+	phy_ctrl |= MII_CR_RESET;
+	pch_gbe_phy_write_reg_miic(hw, PHY_CONTROL, phy_ctrl);
+	udelay(1);
+}
+
+/**
+ * pch_gbe_phy_hw_reset - PHY hardware reset
+ * @hw:	   Pointer to the HW structure
+ */
+void pch_gbe_phy_hw_reset(struct pch_gbe_hw *hw)
+{
+	pch_gbe_phy_write_reg_miic(hw, PHY_CONTROL, PHY_CONTROL_DEFAULT);
+	pch_gbe_phy_write_reg_miic(hw, PHY_AUTONEG_ADV,
+					PHY_AUTONEG_ADV_DEFAULT);
+	pch_gbe_phy_write_reg_miic(hw, PHY_NEXT_PAGE_TX,
+					PHY_NEXT_PAGE_TX_DEFAULT);
+	pch_gbe_phy_write_reg_miic(hw, PHY_1000T_CTRL, PHY_1000T_CTRL_DEFAULT);
+	pch_gbe_phy_write_reg_miic(hw, PHY_PHYSP_CONTROL,
+					PHY_PHYSP_CONTROL_DEFAULT);
+}
+
+/**
+ * pch_gbe_phy_power_up - restore link in case the phy was powered down
+ * @hw:	   Pointer to the HW structure
+ */
+void pch_gbe_phy_power_up(struct pch_gbe_hw *hw)
+{
+	u16 mii_reg;
+
+	mii_reg = 0;
+	/* Just clear the power down bit to wake the phy back up */
+	/* according to the manual, the phy will retain its
+	 * settings across a power-down/up cycle */
+	pch_gbe_phy_read_reg_miic(hw, PHY_CONTROL, &mii_reg);
+	mii_reg &= ~MII_CR_POWER_DOWN;
+	pch_gbe_phy_write_reg_miic(hw, PHY_CONTROL, mii_reg);
+}
+
+/**
+ * pch_gbe_phy_power_down - Power down PHY
+ * @hw:	   Pointer to the HW structure
+ */
+void pch_gbe_phy_power_down(struct pch_gbe_hw *hw)
+{
+	u16 mii_reg;
+
+	mii_reg = 0;
+	/* Power down the PHY so no link is implied when interface is down *
+	 * The PHY cannot be powered down if any of the following is TRUE *
+	 * (a) WoL is enabled
+	 * (b) AMT is active
+	 */
+	pch_gbe_phy_read_reg_miic(hw, PHY_CONTROL, &mii_reg);
+	mii_reg |= MII_CR_POWER_DOWN;
+	pch_gbe_phy_write_reg_miic(hw, PHY_CONTROL, mii_reg);
+	mdelay(1);
+}
+
+/**
+ * pch_gbe_phy_set_rgmii - RGMII interface setting
+ * @hw:	            Pointer to the HW structure
+ */
+inline void pch_gbe_phy_set_rgmii(struct pch_gbe_hw *hw)
+{
+	pch_gbe_phy_sw_reset(hw);
+}
+
+/**
+ * pch_gbe_phy_init_setting - PHY initial setting
+ * @hw:	            Pointer to the HW structure
+ */
+void pch_gbe_phy_init_setting(struct pch_gbe_hw *hw)
+{
+	struct pch_gbe_adapter *adapter;
+	struct ethtool_cmd     cmd;
+	int ret;
+	u16 mii_reg;
+
+	adapter = container_of(hw, struct pch_gbe_adapter, hw);
+	ret = mii_ethtool_gset(&adapter->mii, &cmd);
+	if (ret)
+		pr_err("Error: mii_ethtool_gset\n");
+
+	cmd.speed = hw->mac.link_speed;
+	cmd.duplex = hw->mac.link_duplex;
+	cmd.advertising = hw->phy.autoneg_advertised;
+	cmd.autoneg = hw->mac.autoneg;
+	pch_gbe_phy_write_reg_miic(hw, MII_BMCR, BMCR_RESET);
+	ret = mii_ethtool_sset(&adapter->mii, &cmd);
+	if (ret)
+		pr_err("Error: mii_ethtool_sset\n");
+
+	pch_gbe_phy_sw_reset(hw);
+
+	pch_gbe_phy_read_reg_miic(hw, PHY_PHYSP_CONTROL, &mii_reg);
+	mii_reg |= PHYSP_CTRL_ASSERT_CRS_TX;
+	pch_gbe_phy_write_reg_miic(hw, PHY_PHYSP_CONTROL, mii_reg);
+
+}

drivers/net/pch_gbe/pch_gbe_phy.h

+/*
+ * Copyright (C) 1999 - 2010 Intel Corporation.
+ * Copyright (C) 2010 OKI SEMICONDUCTOR Co., LTD.
+ *
+ * This code was derived from the Intel e1000e Linux driver.
+ *
+ * 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; version 2 of the License.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
+ */
+#ifndef _PCH_GBE_PHY_H_
+#define _PCH_GBE_PHY_H_
+
+#define PCH_GBE_PHY_REGS_LEN		32
+#define	PCH_GBE_PHY_RESET_DELAY_US	10
+#define PCH_GBE_MAC_IFOP_RGMII
+
+s32 pch_gbe_phy_get_id(struct pch_gbe_hw *hw);
+s32 pch_gbe_phy_read_reg_miic(struct pch_gbe_hw *hw, u32 offset, u16 *data);
+s32 pch_gbe_phy_write_reg_miic(struct pch_gbe_hw *hw, u32 offset, u16 data);
+void pch_gbe_phy_sw_reset(struct pch_gbe_hw *hw);
+void pch_gbe_phy_hw_reset(struct pch_gbe_hw *hw);
+void pch_gbe_phy_power_up(struct pch_gbe_hw *hw);
+void pch_gbe_phy_power_down(struct pch_gbe_hw *hw);
+void pch_gbe_phy_set_rgmii(struct pch_gbe_hw *hw);
+void pch_gbe_phy_init_setting(struct pch_gbe_hw *hw);
+
+#endif /* _PCH_GBE_PHY_H_ */