// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Copyright(c) 2007 Atheros Corporation. All rights reserved.
 *
 * Derived from Intel e1000 driver
 * Copyright(c) 1999 - 2005 Intel Corporation. All rights reserved.
 */

#include <linux/netdevice.h>
#include <linux/ethtool.h>
#include <linux/slab.h>

#include "atl1e.h"

static int atl1e_get_link_ksettings(struct net_device *netdev,
                                    struct ethtool_link_ksettings *cmd)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        struct atl1e_hw *hw = &adapter->hw;
        u32 supported, advertising;

        supported = (SUPPORTED_10baseT_Half  |
                           SUPPORTED_10baseT_Full  |
                           SUPPORTED_100baseT_Half |
                           SUPPORTED_100baseT_Full |
                           SUPPORTED_Autoneg       |
                           SUPPORTED_TP);
        if (hw->nic_type == athr_l1e)
                supported |= SUPPORTED_1000baseT_Full;

        advertising = ADVERTISED_TP;

        advertising |= ADVERTISED_Autoneg;
        advertising |= hw->autoneg_advertised;

        cmd->base.port = PORT_TP;
        cmd->base.phy_address = 0;

        if (adapter->link_speed != SPEED_0) {
                cmd->base.speed = adapter->link_speed;
                if (adapter->link_duplex == FULL_DUPLEX)
                        cmd->base.duplex = DUPLEX_FULL;
                else
                        cmd->base.duplex = DUPLEX_HALF;
        } else {
                cmd->base.speed = SPEED_UNKNOWN;
                cmd->base.duplex = DUPLEX_UNKNOWN;
        }

        cmd->base.autoneg = AUTONEG_ENABLE;

        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.supported,
                                                supported);
        ethtool_convert_legacy_u32_to_link_mode(cmd->link_modes.advertising,
                                                advertising);

        return 0;
}

static int atl1e_set_link_ksettings(struct net_device *netdev,
                                    const struct ethtool_link_ksettings *cmd)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        struct atl1e_hw *hw = &adapter->hw;
        u32 advertising;

        ethtool_convert_link_mode_to_legacy_u32(&advertising,
                                                cmd->link_modes.advertising);

        while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
                msleep(1);

        if (cmd->base.autoneg == AUTONEG_ENABLE) {
                u16 adv4, adv9;

                if (advertising & ADVERTISE_1000_FULL) {
                        if (hw->nic_type == athr_l1e) {
                                hw->autoneg_advertised =
                                        advertising & AT_ADV_MASK;
                        } else {
                                clear_bit(__AT_RESETTING, &adapter->flags);
                                return -EINVAL;
                        }
                } else if (advertising & ADVERTISE_1000_HALF) {
                        clear_bit(__AT_RESETTING, &adapter->flags);
                        return -EINVAL;
                } else {
                        hw->autoneg_advertised =
                                advertising & AT_ADV_MASK;
                }
                advertising = hw->autoneg_advertised |
                                    ADVERTISED_TP | ADVERTISED_Autoneg;

                adv4 = hw->mii_autoneg_adv_reg & ~ADVERTISE_ALL;
                adv9 = hw->mii_1000t_ctrl_reg & ~MII_AT001_CR_1000T_SPEED_MASK;
                if (hw->autoneg_advertised & ADVERTISE_10_HALF)
                        adv4 |= ADVERTISE_10HALF;
                if (hw->autoneg_advertised & ADVERTISE_10_FULL)
                        adv4 |= ADVERTISE_10FULL;
                if (hw->autoneg_advertised & ADVERTISE_100_HALF)
                        adv4 |= ADVERTISE_100HALF;
                if (hw->autoneg_advertised & ADVERTISE_100_FULL)
                        adv4 |= ADVERTISE_100FULL;
                if (hw->autoneg_advertised & ADVERTISE_1000_FULL)
                        adv9 |= ADVERTISE_1000FULL;

                if (adv4 != hw->mii_autoneg_adv_reg ||
                                adv9 != hw->mii_1000t_ctrl_reg) {
                        hw->mii_autoneg_adv_reg = adv4;
                        hw->mii_1000t_ctrl_reg = adv9;
                        hw->re_autoneg = true;
                }

        } else {
                clear_bit(__AT_RESETTING, &adapter->flags);
                return -EINVAL;
        }

        /* reset the link */

        if (netif_running(adapter->netdev)) {
                atl1e_down(adapter);
                atl1e_up(adapter);
        } else
                atl1e_reset_hw(&adapter->hw);

        clear_bit(__AT_RESETTING, &adapter->flags);
        return 0;
}

static u32 atl1e_get_msglevel(struct net_device *netdev)
{
#ifdef DBG
        return 1;
#else
        return 0;
#endif
}

static int atl1e_get_regs_len(struct net_device *netdev)
{
        return AT_REGS_LEN * sizeof(u32);
}

static void atl1e_get_regs(struct net_device *netdev,
                           struct ethtool_regs *regs, void *p)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        struct atl1e_hw *hw = &adapter->hw;
        u32 *regs_buff = p;
        u16 phy_data;

        memset(p, 0, AT_REGS_LEN * sizeof(u32));

        regs->version = (1 << 24) | (hw->revision_id << 16) | hw->device_id;

        regs_buff[0]  = AT_READ_REG(hw, REG_VPD_CAP);
        regs_buff[1]  = AT_READ_REG(hw, REG_SPI_FLASH_CTRL);
        regs_buff[2]  = AT_READ_REG(hw, REG_SPI_FLASH_CONFIG);
        regs_buff[3]  = AT_READ_REG(hw, REG_TWSI_CTRL);
        regs_buff[4]  = AT_READ_REG(hw, REG_PCIE_DEV_MISC_CTRL);
        regs_buff[5]  = AT_READ_REG(hw, REG_MASTER_CTRL);
        regs_buff[6]  = AT_READ_REG(hw, REG_MANUAL_TIMER_INIT);
        regs_buff[7]  = AT_READ_REG(hw, REG_IRQ_MODU_TIMER_INIT);
        regs_buff[8]  = AT_READ_REG(hw, REG_GPHY_CTRL);
        regs_buff[9]  = AT_READ_REG(hw, REG_CMBDISDMA_TIMER);
        regs_buff[10] = AT_READ_REG(hw, REG_IDLE_STATUS);
        regs_buff[11] = AT_READ_REG(hw, REG_MDIO_CTRL);
        regs_buff[12] = AT_READ_REG(hw, REG_SERDES_LOCK);
        regs_buff[13] = AT_READ_REG(hw, REG_MAC_CTRL);
        regs_buff[14] = AT_READ_REG(hw, REG_MAC_IPG_IFG);
        regs_buff[15] = AT_READ_REG(hw, REG_MAC_STA_ADDR);
        regs_buff[16] = AT_READ_REG(hw, REG_MAC_STA_ADDR+4);
        regs_buff[17] = AT_READ_REG(hw, REG_RX_HASH_TABLE);
        regs_buff[18] = AT_READ_REG(hw, REG_RX_HASH_TABLE+4);
        regs_buff[19] = AT_READ_REG(hw, REG_MAC_HALF_DUPLX_CTRL);
        regs_buff[20] = AT_READ_REG(hw, REG_MTU);
        regs_buff[21] = AT_READ_REG(hw, REG_WOL_CTRL);
        regs_buff[22] = AT_READ_REG(hw, REG_SRAM_TRD_ADDR);
        regs_buff[23] = AT_READ_REG(hw, REG_SRAM_TRD_LEN);
        regs_buff[24] = AT_READ_REG(hw, REG_SRAM_RXF_ADDR);
        regs_buff[25] = AT_READ_REG(hw, REG_SRAM_RXF_LEN);
        regs_buff[26] = AT_READ_REG(hw, REG_SRAM_TXF_ADDR);
        regs_buff[27] = AT_READ_REG(hw, REG_SRAM_TXF_LEN);
        regs_buff[28] = AT_READ_REG(hw, REG_SRAM_TCPH_ADDR);
        regs_buff[29] = AT_READ_REG(hw, REG_SRAM_PKTH_ADDR);

        atl1e_read_phy_reg(hw, MII_BMCR, &phy_data);
        regs_buff[73] = (u32)phy_data;
        atl1e_read_phy_reg(hw, MII_BMSR, &phy_data);
        regs_buff[74] = (u32)phy_data;
}

static int atl1e_get_eeprom_len(struct net_device *netdev)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);

        if (!atl1e_check_eeprom_exist(&adapter->hw))
                return AT_EEPROM_LEN;
        else
                return 0;
}

static int atl1e_get_eeprom(struct net_device *netdev,
                struct ethtool_eeprom *eeprom, u8 *bytes)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        struct atl1e_hw *hw = &adapter->hw;
        u32 *eeprom_buff;
        int first_dword, last_dword;
        int ret_val = 0;
        int i;

        if (eeprom->len == 0)
                return -EINVAL;

        if (atl1e_check_eeprom_exist(hw)) /* not exist */
                return -EINVAL;

        eeprom->magic = hw->vendor_id | (hw->device_id << 16);

        first_dword = eeprom->offset >> 2;
        last_dword = (eeprom->offset + eeprom->len - 1) >> 2;

        eeprom_buff = kmalloc_array(last_dword - first_dword + 1, sizeof(u32),
                                    GFP_KERNEL);
        if (eeprom_buff == NULL)
                return -ENOMEM;

        for (i = first_dword; i < last_dword; i++) {
                if (!atl1e_read_eeprom(hw, i * 4, &(eeprom_buff[i-first_dword]))) {
                        kfree(eeprom_buff);
                        return -EIO;
                }
        }

        memcpy(bytes, (u8 *)eeprom_buff + (eeprom->offset & 3),
                        eeprom->len);
        kfree(eeprom_buff);

        return ret_val;
}

static int atl1e_set_eeprom(struct net_device *netdev,
                            struct ethtool_eeprom *eeprom, u8 *bytes)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        struct atl1e_hw *hw = &adapter->hw;
        u32 *eeprom_buff;
        u32 *ptr;
        int first_dword, last_dword;
        int ret_val = 0;
        int i;

        if (eeprom->len == 0)
                return -EOPNOTSUPP;

        if (eeprom->magic != (hw->vendor_id | (hw->device_id << 16)))
                return -EINVAL;

        first_dword = eeprom->offset >> 2;
        last_dword = (eeprom->offset + eeprom->len - 1) >> 2;
        eeprom_buff = kmalloc(AT_EEPROM_LEN, GFP_KERNEL);
        if (eeprom_buff == NULL)
                return -ENOMEM;

        ptr = eeprom_buff;

        if (eeprom->offset & 3) {
                /* need read/modify/write of first changed EEPROM word */
                /* only the second byte of the word is being modified */
                if (!atl1e_read_eeprom(hw, first_dword * 4, &(eeprom_buff[0]))) {
                        ret_val = -EIO;
                        goto out;
                }
                ptr++;
        }
        if (((eeprom->offset + eeprom->len) & 3)) {
                /* need read/modify/write of last changed EEPROM word */
                /* only the first byte of the word is being modified */

                if (!atl1e_read_eeprom(hw, last_dword * 4,
                                &(eeprom_buff[last_dword - first_dword]))) {
                        ret_val = -EIO;
                        goto out;
                }
        }

        /* Device's eeprom is always little-endian, word addressable */
        memcpy(ptr, bytes, eeprom->len);

        for (i = 0; i < last_dword - first_dword + 1; i++) {
                if (!atl1e_write_eeprom(hw, ((first_dword + i) * 4),
                                  eeprom_buff[i])) {
                        ret_val = -EIO;
                        goto out;
                }
        }
out:
        kfree(eeprom_buff);
        return ret_val;
}

static void atl1e_get_drvinfo(struct net_device *netdev,
                struct ethtool_drvinfo *drvinfo)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);

        strscpy(drvinfo->driver,  atl1e_driver_name, sizeof(drvinfo->driver));
        strscpy(drvinfo->fw_version, "L1e", sizeof(drvinfo->fw_version));
        strscpy(drvinfo->bus_info, pci_name(adapter->pdev),
                sizeof(drvinfo->bus_info));
}

static void atl1e_get_wol(struct net_device *netdev,
                          struct ethtool_wolinfo *wol)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);

        wol->supported = WAKE_MAGIC | WAKE_PHY;
        wol->wolopts = 0;

        if (adapter->wol & AT_WUFC_EX)
                wol->wolopts |= WAKE_UCAST;
        if (adapter->wol & AT_WUFC_MC)
                wol->wolopts |= WAKE_MCAST;
        if (adapter->wol & AT_WUFC_BC)
                wol->wolopts |= WAKE_BCAST;
        if (adapter->wol & AT_WUFC_MAG)
                wol->wolopts |= WAKE_MAGIC;
        if (adapter->wol & AT_WUFC_LNKC)
                wol->wolopts |= WAKE_PHY;
}

static int atl1e_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);

        if (wol->wolopts & (WAKE_ARP | WAKE_MAGICSECURE |
                            WAKE_UCAST | WAKE_MCAST | WAKE_BCAST))
                return -EOPNOTSUPP;
        /* these settings will always override what we currently have */
        adapter->wol = 0;

        if (wol->wolopts & WAKE_MAGIC)
                adapter->wol |= AT_WUFC_MAG;
        if (wol->wolopts & WAKE_PHY)
                adapter->wol |= AT_WUFC_LNKC;

        device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);

        return 0;
}

static int atl1e_nway_reset(struct net_device *netdev)
{
        struct atl1e_adapter *adapter = netdev_priv(netdev);
        if (netif_running(netdev))
                atl1e_reinit_locked(adapter);
        return 0;
}

static const struct ethtool_ops atl1e_ethtool_ops = {
        .get_drvinfo            = atl1e_get_drvinfo,
        .get_regs_len           = atl1e_get_regs_len,
        .get_regs               = atl1e_get_regs,
        .get_wol                = atl1e_get_wol,
        .set_wol                = atl1e_set_wol,
        .get_msglevel           = atl1e_get_msglevel,
        .nway_reset             = atl1e_nway_reset,
        .get_link               = ethtool_op_get_link,
        .get_eeprom_len         = atl1e_get_eeprom_len,
        .get_eeprom             = atl1e_get_eeprom,
        .set_eeprom             = atl1e_set_eeprom,
        .get_link_ksettings     = atl1e_get_link_ksettings,
        .set_link_ksettings     = atl1e_set_link_ksettings,
};

void atl1e_set_ethtool_ops(struct net_device *netdev)
{
        netdev->ethtool_ops = &atl1e_ethtool_ops;
}