/* Copyright 2008-2015 Freescale Semiconductor, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Freescale Semiconductor nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 *
 * ALTERNATIVELY, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") as published by the Free Software
 * Foundation, either version 2 of that License or (at your option) any
 * later version.
 *
 * THIS SOFTWARE IS PROVIDED BY Freescale Semiconductor ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL Freescale Semiconductor BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/init.h>
#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <linux/device.h>
#include <linux/phy.h>
#include <linux/netdevice.h>
#include <linux/phy_fixed.h>
#include <linux/etherdevice.h>
#include <linux/libfdt_env.h>

#include "mac.h"
#include "fman_mac.h"
#include "fman_dtsec.h"
#include "fman_tgec.h"
#include "fman_memac.h"

MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("FSL FMan MAC API based driver");

struct mac_priv_s {
        struct device                   *dev;
        void __iomem                    *vaddr;
        u8                              cell_index;
        struct fman                     *fman;
        struct device_node              *internal_phy_node;
        /* List of multicast addresses */
        struct list_head                mc_addr_list;
        struct platform_device          *eth_dev;
        struct fixed_phy_status         *fixed_link;
        u16                             speed;
        u16                             max_speed;

        int (*enable)(struct fman_mac *mac_dev, enum comm_mode mode);
        int (*disable)(struct fman_mac *mac_dev, enum comm_mode mode);
};

struct mac_address {
        u8 addr[ETH_ALEN];
        struct list_head list;
};

static void mac_exception(void *handle, enum fman_mac_exceptions ex)
{
        struct mac_device       *mac_dev;
        struct mac_priv_s       *priv;

        mac_dev = handle;
        priv = mac_dev->priv;

        if (ex == FM_MAC_EX_10G_RX_FIFO_OVFL) {
                /* don't flag RX FIFO after the first */
                mac_dev->set_exception(mac_dev->fman_mac,
                                       FM_MAC_EX_10G_RX_FIFO_OVFL, false);
                dev_err(priv->dev, "10G MAC got RX FIFO Error = %x\n", ex);
        }

        dev_dbg(priv->dev, "%s:%s() -> %d\n", KBUILD_BASENAME ".c",
                __func__, ex);
}

static void set_fman_mac_params(struct mac_device *mac_dev,
                                struct fman_mac_params *params)
{
        struct mac_priv_s *priv = mac_dev->priv;

        params->base_addr = (typeof(params->base_addr))
                devm_ioremap(priv->dev, mac_dev->res->start,
                             resource_size(mac_dev->res));
        memcpy(&params->addr, mac_dev->addr, sizeof(mac_dev->addr));
        params->max_speed       = priv->max_speed;
        params->phy_if          = mac_dev->phy_if;
        params->basex_if        = false;
        params->mac_id          = priv->cell_index;
        params->fm              = (void *)priv->fman;
        params->exception_cb    = mac_exception;
        params->event_cb        = mac_exception;
        params->dev_id          = mac_dev;
        params->internal_phy_node = priv->internal_phy_node;
}

static int tgec_initialization(struct mac_device *mac_dev)
{
        int err;
        struct mac_priv_s       *priv;
        struct fman_mac_params  params;
        u32                     version;

        priv = mac_dev->priv;

        set_fman_mac_params(mac_dev, &params);

        mac_dev->fman_mac = tgec_config(&params);
        if (!mac_dev->fman_mac) {
                err = -EINVAL;
                goto _return;
        }

        err = tgec_cfg_max_frame_len(mac_dev->fman_mac, fman_get_max_frm());
        if (err < 0)
                goto _return_fm_mac_free;

        err = tgec_init(mac_dev->fman_mac);
        if (err < 0)
                goto _return_fm_mac_free;

        /* For 10G MAC, disable Tx ECC exception */
        err = mac_dev->set_exception(mac_dev->fman_mac,
                                     FM_MAC_EX_10G_TX_ECC_ER, false);
        if (err < 0)
                goto _return_fm_mac_free;

        err = tgec_get_version(mac_dev->fman_mac, &version);
        if (err < 0)
                goto _return_fm_mac_free;

        dev_info(priv->dev, "FMan XGEC version: 0x%08x\n", version);

        goto _return;

_return_fm_mac_free:
        tgec_free(mac_dev->fman_mac);

_return:
        return err;
}

static int dtsec_initialization(struct mac_device *mac_dev)
{
        int                     err;
        struct mac_priv_s       *priv;
        struct fman_mac_params  params;
        u32                     version;

        priv = mac_dev->priv;

        set_fman_mac_params(mac_dev, &params);

        mac_dev->fman_mac = dtsec_config(&params);
        if (!mac_dev->fman_mac) {
                err = -EINVAL;
                goto _return;
        }

        err = dtsec_cfg_max_frame_len(mac_dev->fman_mac, fman_get_max_frm());
        if (err < 0)
                goto _return_fm_mac_free;

        err = dtsec_cfg_pad_and_crc(mac_dev->fman_mac, true);
        if (err < 0)
                goto _return_fm_mac_free;

        err = dtsec_init(mac_dev->fman_mac);
        if (err < 0)
                goto _return_fm_mac_free;

        /* For 1G MAC, disable by default the MIB counters overflow interrupt */
        err = mac_dev->set_exception(mac_dev->fman_mac,
                                     FM_MAC_EX_1G_RX_MIB_CNT_OVFL, false);
        if (err < 0)
                goto _return_fm_mac_free;

        err = dtsec_get_version(mac_dev->fman_mac, &version);
        if (err < 0)
                goto _return_fm_mac_free;

        dev_info(priv->dev, "FMan dTSEC version: 0x%08x\n", version);

        goto _return;

_return_fm_mac_free:
        dtsec_free(mac_dev->fman_mac);

_return:
        return err;
}

static int memac_initialization(struct mac_device *mac_dev)
{
        int                      err;
        struct mac_priv_s       *priv;
        struct fman_mac_params   params;

        priv = mac_dev->priv;

        set_fman_mac_params(mac_dev, &params);

        if (priv->max_speed == SPEED_10000)
                params.phy_if = PHY_INTERFACE_MODE_XGMII;

        mac_dev->fman_mac = memac_config(&params);
        if (!mac_dev->fman_mac) {
                err = -EINVAL;
                goto _return;
        }

        err = memac_cfg_max_frame_len(mac_dev->fman_mac, fman_get_max_frm());
        if (err < 0)
                goto _return_fm_mac_free;

        err = memac_cfg_reset_on_init(mac_dev->fman_mac, true);
        if (err < 0)
                goto _return_fm_mac_free;

        err = memac_cfg_fixed_link(mac_dev->fman_mac, priv->fixed_link);
        if (err < 0)
                goto _return_fm_mac_free;

        err = memac_init(mac_dev->fman_mac);
        if (err < 0)
                goto _return_fm_mac_free;

        dev_info(priv->dev, "FMan MEMAC\n");

        goto _return;

_return_fm_mac_free:
        memac_free(mac_dev->fman_mac);

_return:
        return err;
}

static int start(struct mac_device *mac_dev)
{
        int      err;
        struct phy_device *phy_dev = mac_dev->phy_dev;
        struct mac_priv_s *priv = mac_dev->priv;

        err = priv->enable(mac_dev->fman_mac, COMM_MODE_RX_AND_TX);
        if (!err && phy_dev)
                phy_start(phy_dev);

        return err;
}

static int stop(struct mac_device *mac_dev)
{
        struct mac_priv_s *priv = mac_dev->priv;

        if (mac_dev->phy_dev)
                phy_stop(mac_dev->phy_dev);

        return priv->disable(mac_dev->fman_mac, COMM_MODE_RX_AND_TX);
}

static int set_multi(struct net_device *net_dev, struct mac_device *mac_dev)
{
        struct mac_priv_s       *priv;
        struct mac_address      *old_addr, *tmp;
        struct netdev_hw_addr   *ha;
        int                     err;
        enet_addr_t             *addr;

        priv = mac_dev->priv;

        /* Clear previous address list */
        list_for_each_entry_safe(old_addr, tmp, &priv->mc_addr_list, list) {
                addr = (enet_addr_t *)old_addr->addr;
                err = mac_dev->remove_hash_mac_addr(mac_dev->fman_mac, addr);
                if (err < 0)
                        return err;

                list_del(&old_addr->list);
                kfree(old_addr);
        }

        /* Add all the addresses from the new list */
        netdev_for_each_mc_addr(ha, net_dev) {
                addr = (enet_addr_t *)ha->addr;
                err = mac_dev->add_hash_mac_addr(mac_dev->fman_mac, addr);
                if (err < 0)
                        return err;

                tmp = kmalloc(sizeof(*tmp), GFP_ATOMIC);
                if (!tmp)
                        return -ENOMEM;

                ether_addr_copy(tmp->addr, ha->addr);
                list_add(&tmp->list, &priv->mc_addr_list);
        }
        return 0;
}

/**
 * fman_set_mac_active_pause
 * @mac_dev:    A pointer to the MAC device
 * @rx:         Pause frame setting for RX
 * @tx:         Pause frame setting for TX
 *
 * Set the MAC RX/TX PAUSE frames settings
 *
 * Avoid redundant calls to FMD, if the MAC driver already contains the desired
 * active PAUSE settings. Otherwise, the new active settings should be reflected
 * in FMan.
 *
 * Return: 0 on success; Error code otherwise.
 */
int fman_set_mac_active_pause(struct mac_device *mac_dev, bool rx, bool tx)
{
        struct fman_mac *fman_mac = mac_dev->fman_mac;
        int err = 0;

        if (rx != mac_dev->rx_pause_active) {
                err = mac_dev->set_rx_pause(fman_mac, rx);
                if (likely(err == 0))
                        mac_dev->rx_pause_active = rx;
        }

        if (tx != mac_dev->tx_pause_active) {
                u16 pause_time = (tx ? FSL_FM_PAUSE_TIME_ENABLE :
                                         FSL_FM_PAUSE_TIME_DISABLE);

                err = mac_dev->set_tx_pause(fman_mac, 0, pause_time, 0);

                if (likely(err == 0))
                        mac_dev->tx_pause_active = tx;
        }

        return err;
}
EXPORT_SYMBOL(fman_set_mac_active_pause);

/**
 * fman_get_pause_cfg
 * @mac_dev:    A pointer to the MAC device
 * @rx:         Return value for RX setting
 * @tx:         Return value for TX setting
 *
 * Determine the MAC RX/TX PAUSE frames settings based on PHY
 * autonegotiation or values set by eththool.
 *
 * Return: Pointer to FMan device.
 */
void fman_get_pause_cfg(struct mac_device *mac_dev, bool *rx_pause,
                        bool *tx_pause)
{
        struct phy_device *phy_dev = mac_dev->phy_dev;
        u16 lcl_adv, rmt_adv;
        u8 flowctrl;

        *rx_pause = *tx_pause = false;

        if (!phy_dev->duplex)
                return;

        /* If PAUSE autonegotiation is disabled, the TX/RX PAUSE settings
         * are those set by ethtool.
         */
        if (!mac_dev->autoneg_pause) {
                *rx_pause = mac_dev->rx_pause_req;
                *tx_pause = mac_dev->tx_pause_req;
                return;
        }

        /* Else if PAUSE autonegotiation is enabled, the TX/RX PAUSE
         * settings depend on the result of the link negotiation.
         */

        /* get local capabilities */
        lcl_adv = 0;
        if (phy_dev->advertising & ADVERTISED_Pause)
                lcl_adv |= ADVERTISE_PAUSE_CAP;
        if (phy_dev->advertising & ADVERTISED_Asym_Pause)
                lcl_adv |= ADVERTISE_PAUSE_ASYM;

        /* get link partner capabilities */
        rmt_adv = 0;
        if (phy_dev->pause)
                rmt_adv |= LPA_PAUSE_CAP;
        if (phy_dev->asym_pause)
                rmt_adv |= LPA_PAUSE_ASYM;

        /* Calculate TX/RX settings based on local and peer advertised
         * symmetric/asymmetric PAUSE capabilities.
         */
        flowctrl = mii_resolve_flowctrl_fdx(lcl_adv, rmt_adv);
        if (flowctrl & FLOW_CTRL_RX)
                *rx_pause = true;
        if (flowctrl & FLOW_CTRL_TX)
                *tx_pause = true;
}
EXPORT_SYMBOL(fman_get_pause_cfg);

static void adjust_link_void(struct mac_device *mac_dev)
{
}

static void adjust_link_dtsec(struct mac_device *mac_dev)
{
        struct phy_device *phy_dev = mac_dev->phy_dev;
        struct fman_mac *fman_mac;
        bool rx_pause, tx_pause;
        int err;

        fman_mac = mac_dev->fman_mac;
        if (!phy_dev->link) {
                dtsec_restart_autoneg(fman_mac);

                return;
        }

        dtsec_adjust_link(fman_mac, phy_dev->speed);
        fman_get_pause_cfg(mac_dev, &rx_pause, &tx_pause);
        err = fman_set_mac_active_pause(mac_dev, rx_pause, tx_pause);
        if (err < 0)
                dev_err(mac_dev->priv->dev, "fman_set_mac_active_pause() = %d\n",
                        err);
}

static void adjust_link_memac(struct mac_device *mac_dev)
{
        struct phy_device *phy_dev = mac_dev->phy_dev;
        struct fman_mac *fman_mac;
        bool rx_pause, tx_pause;
        int err;

        fman_mac = mac_dev->fman_mac;
        memac_adjust_link(fman_mac, phy_dev->speed);

        fman_get_pause_cfg(mac_dev, &rx_pause, &tx_pause);
        err = fman_set_mac_active_pause(mac_dev, rx_pause, tx_pause);
        if (err < 0)
                dev_err(mac_dev->priv->dev, "fman_set_mac_active_pause() = %d\n",
                        err);
}

static void setup_dtsec(struct mac_device *mac_dev)
{
        mac_dev->init                   = dtsec_initialization;
        mac_dev->set_promisc            = dtsec_set_promiscuous;
        mac_dev->change_addr            = dtsec_modify_mac_address;
        mac_dev->add_hash_mac_addr      = dtsec_add_hash_mac_address;
        mac_dev->remove_hash_mac_addr   = dtsec_del_hash_mac_address;
        mac_dev->set_tx_pause           = dtsec_set_tx_pause_frames;
        mac_dev->set_rx_pause           = dtsec_accept_rx_pause_frames;
        mac_dev->set_exception          = dtsec_set_exception;
        mac_dev->set_allmulti           = dtsec_set_allmulti;
        mac_dev->set_tstamp             = dtsec_set_tstamp;
        mac_dev->set_multi              = set_multi;
        mac_dev->start                  = start;
        mac_dev->stop                   = stop;
        mac_dev->adjust_link            = adjust_link_dtsec;
        mac_dev->priv->enable           = dtsec_enable;
        mac_dev->priv->disable          = dtsec_disable;
}

static void setup_tgec(struct mac_device *mac_dev)
{
        mac_dev->init                   = tgec_initialization;
        mac_dev->set_promisc            = tgec_set_promiscuous;
        mac_dev->change_addr            = tgec_modify_mac_address;
        mac_dev->add_hash_mac_addr      = tgec_add_hash_mac_address;
        mac_dev->remove_hash_mac_addr   = tgec_del_hash_mac_address;
        mac_dev->set_tx_pause           = tgec_set_tx_pause_frames;
        mac_dev->set_rx_pause           = tgec_accept_rx_pause_frames;
        mac_dev->set_exception          = tgec_set_exception;
        mac_dev->set_allmulti           = tgec_set_allmulti;
        mac_dev->set_tstamp             = tgec_set_tstamp;
        mac_dev->set_multi              = set_multi;
        mac_dev->start                  = start;
        mac_dev->stop                   = stop;
        mac_dev->adjust_link            = adjust_link_void;
        mac_dev->priv->enable           = tgec_enable;
        mac_dev->priv->disable          = tgec_disable;
}

static void setup_memac(struct mac_device *mac_dev)
{
        mac_dev->init                   = memac_initialization;
        mac_dev->set_promisc            = memac_set_promiscuous;
        mac_dev->change_addr            = memac_modify_mac_address;
        mac_dev->add_hash_mac_addr      = memac_add_hash_mac_address;
        mac_dev->remove_hash_mac_addr   = memac_del_hash_mac_address;
        mac_dev->set_tx_pause           = memac_set_tx_pause_frames;
        mac_dev->set_rx_pause           = memac_accept_rx_pause_frames;
        mac_dev->set_exception          = memac_set_exception;
        mac_dev->set_allmulti           = memac_set_allmulti;
        mac_dev->set_tstamp             = memac_set_tstamp;
        mac_dev->set_multi              = set_multi;
        mac_dev->start                  = start;
        mac_dev->stop                   = stop;
        mac_dev->adjust_link            = adjust_link_memac;
        mac_dev->priv->enable           = memac_enable;
        mac_dev->priv->disable          = memac_disable;
}

#define DTSEC_SUPPORTED \
        (SUPPORTED_10baseT_Half \
        | SUPPORTED_10baseT_Full \
        | SUPPORTED_100baseT_Half \
        | SUPPORTED_100baseT_Full \
        | SUPPORTED_Autoneg \
        | SUPPORTED_Pause \
        | SUPPORTED_Asym_Pause \
        | SUPPORTED_MII)

static DEFINE_MUTEX(eth_lock);

static const u16 phy2speed[] = {
        [PHY_INTERFACE_MODE_MII]                = SPEED_100,
        [PHY_INTERFACE_MODE_GMII]               = SPEED_1000,
        [PHY_INTERFACE_MODE_SGMII]              = SPEED_1000,
        [PHY_INTERFACE_MODE_TBI]                = SPEED_1000,
        [PHY_INTERFACE_MODE_RMII]               = SPEED_100,
        [PHY_INTERFACE_MODE_RGMII]              = SPEED_1000,
        [PHY_INTERFACE_MODE_RGMII_ID]           = SPEED_1000,
        [PHY_INTERFACE_MODE_RGMII_RXID] = SPEED_1000,
        [PHY_INTERFACE_MODE_RGMII_TXID] = SPEED_1000,
        [PHY_INTERFACE_MODE_RTBI]               = SPEED_1000,
        [PHY_INTERFACE_MODE_QSGMII]             = SPEED_1000,
        [PHY_INTERFACE_MODE_XGMII]              = SPEED_10000
};

static struct platform_device *dpaa_eth_add_device(int fman_id,
                                                   struct mac_device *mac_dev)
{
        struct platform_device *pdev;
        struct dpaa_eth_data data;
        struct mac_priv_s       *priv;
        static int dpaa_eth_dev_cnt;
        int ret;

        priv = mac_dev->priv;

        data.mac_dev = mac_dev;
        data.mac_hw_id = priv->cell_index;
        data.fman_hw_id = fman_id;

        mutex_lock(&eth_lock);
        pdev = platform_device_alloc("dpaa-ethernet", dpaa_eth_dev_cnt);
        if (!pdev) {
                ret = -ENOMEM;
                goto no_mem;
        }

        pdev->dev.parent = priv->dev;

        ret = platform_device_add_data(pdev, &data, sizeof(data));
        if (ret)
                goto err;

        ret = platform_device_add(pdev);
        if (ret)
                goto err;

        dpaa_eth_dev_cnt++;
        mutex_unlock(&eth_lock);

        return pdev;

err:
        platform_device_put(pdev);
no_mem:
        mutex_unlock(&eth_lock);

        return ERR_PTR(ret);
}

static const struct of_device_id mac_match[] = {
        { .compatible   = "fsl,fman-dtsec" },
        { .compatible   = "fsl,fman-xgec" },
        { .compatible   = "fsl,fman-memac" },
        {}
};
MODULE_DEVICE_TABLE(of, mac_match);

static int mac_probe(struct platform_device *_of_dev)
{
        int                      err, i, nph;
        struct device           *dev;
        struct device_node      *mac_node, *dev_node;
        struct mac_device       *mac_dev;
        struct platform_device  *of_dev;
        struct resource          res;
        struct mac_priv_s       *priv;
        const u8                *mac_addr;
        u32                      val;
        u8                      fman_id;
        int                     phy_if;

        dev = &_of_dev->dev;
        mac_node = dev->of_node;

        mac_dev = devm_kzalloc(dev, sizeof(*mac_dev), GFP_KERNEL);
        if (!mac_dev) {
                err = -ENOMEM;
                goto _return;
        }
        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv) {
                err = -ENOMEM;
                goto _return;
        }

        /* Save private information */
        mac_dev->priv = priv;
        priv->dev = dev;

        if (of_device_is_compatible(mac_node, "fsl,fman-dtsec")) {
                setup_dtsec(mac_dev);
                priv->internal_phy_node = of_parse_phandle(mac_node,
                                                          "tbi-handle", 0);
        } else if (of_device_is_compatible(mac_node, "fsl,fman-xgec")) {
                setup_tgec(mac_dev);
        } else if (of_device_is_compatible(mac_node, "fsl,fman-memac")) {
                setup_memac(mac_dev);
                priv->internal_phy_node = of_parse_phandle(mac_node,
                                                          "pcsphy-handle", 0);
        } else {
                dev_err(dev, "MAC node (%pOF) contains unsupported MAC\n",
                        mac_node);
                err = -EINVAL;
                goto _return;
        }

        INIT_LIST_HEAD(&priv->mc_addr_list);

        /* Get the FM node */
        dev_node = of_get_parent(mac_node);
        if (!dev_node) {
                dev_err(dev, "of_get_parent(%pOF) failed\n",
                        mac_node);
                err = -EINVAL;
                goto _return_of_get_parent;
        }

        of_dev = of_find_device_by_node(dev_node);
        if (!of_dev) {
                dev_err(dev, "of_find_device_by_node(%pOF) failed\n", dev_node);
                err = -EINVAL;
                goto _return_of_node_put;
        }

        /* Get the FMan cell-index */
        err = of_property_read_u32(dev_node, "cell-index", &val);
        if (err) {
                dev_err(dev, "failed to read cell-index for %pOF\n", dev_node);
                err = -EINVAL;
                goto _return_of_node_put;
        }
        /* cell-index 0 => FMan id 1 */
        fman_id = (u8)(val + 1);

        priv->fman = fman_bind(&of_dev->dev);
        if (!priv->fman) {
                dev_err(dev, "fman_bind(%pOF) failed\n", dev_node);
                err = -ENODEV;
                goto _return_of_node_put;
        }

        of_node_put(dev_node);

        /* Get the address of the memory mapped registers */
        err = of_address_to_resource(mac_node, 0, &res);
        if (err < 0) {
                dev_err(dev, "of_address_to_resource(%pOF) = %d\n",
                        mac_node, err);
                goto _return_of_get_parent;
        }

        mac_dev->res = __devm_request_region(dev,
                                             fman_get_mem_region(priv->fman),
                                             res.start, res.end + 1 - res.start,
                                             "mac");
        if (!mac_dev->res) {
                dev_err(dev, "__devm_request_mem_region(mac) failed\n");
                err = -EBUSY;
                goto _return_of_get_parent;
        }

        priv->vaddr = devm_ioremap(dev, mac_dev->res->start,
                                   mac_dev->res->end + 1 - mac_dev->res->start);
        if (!priv->vaddr) {
                dev_err(dev, "devm_ioremap() failed\n");
                err = -EIO;
                goto _return_of_get_parent;
        }

        if (!of_device_is_available(mac_node)) {
                err = -ENODEV;
                goto _return_of_get_parent;
        }

        /* Get the cell-index */
        err = of_property_read_u32(mac_node, "cell-index", &val);
        if (err) {
                dev_err(dev, "failed to read cell-index for %pOF\n", mac_node);
                err = -EINVAL;
                goto _return_of_get_parent;
        }
        priv->cell_index = (u8)val;

        /* Get the MAC address */
        mac_addr = of_get_mac_address(mac_node);
        if (!mac_addr) {
                dev_err(dev, "of_get_mac_address(%pOF) failed\n", mac_node);
                err = -EINVAL;
                goto _return_of_get_parent;
        }
        memcpy(mac_dev->addr, mac_addr, sizeof(mac_dev->addr));

        /* Get the port handles */
        nph = of_count_phandle_with_args(mac_node, "fsl,fman-ports", NULL);
        if (unlikely(nph < 0)) {
                dev_err(dev, "of_count_phandle_with_args(%pOF, fsl,fman-ports) failed\n",
                        mac_node);
                err = nph;
                goto _return_of_get_parent;
        }

        if (nph != ARRAY_SIZE(mac_dev->port)) {
                dev_err(dev, "Not supported number of fman-ports handles of mac node %pOF from device tree\n",
                        mac_node);
                err = -EINVAL;
                goto _return_of_get_parent;
        }

        for (i = 0; i < ARRAY_SIZE(mac_dev->port); i++) {
                /* Find the port node */
                dev_node = of_parse_phandle(mac_node, "fsl,fman-ports", i);
                if (!dev_node) {
                        dev_err(dev, "of_parse_phandle(%pOF, fsl,fman-ports) failed\n",
                                mac_node);
                        err = -EINVAL;
                        goto _return_of_node_put;
                }

                of_dev = of_find_device_by_node(dev_node);
                if (!of_dev) {
                        dev_err(dev, "of_find_device_by_node(%pOF) failed\n",
                                dev_node);
                        err = -EINVAL;
                        goto _return_of_node_put;
                }

                mac_dev->port[i] = fman_port_bind(&of_dev->dev);
                if (!mac_dev->port[i]) {
                        dev_err(dev, "dev_get_drvdata(%pOF) failed\n",
                                dev_node);
                        err = -EINVAL;
                        goto _return_of_node_put;
                }
                of_node_put(dev_node);
        }

        /* Get the PHY connection type */
        phy_if = of_get_phy_mode(mac_node);
        if (phy_if < 0) {
                dev_warn(dev,
                         "of_get_phy_mode() for %pOF failed. Defaulting to SGMII\n",
                         mac_node);
                phy_if = PHY_INTERFACE_MODE_SGMII;
        }
        mac_dev->phy_if = phy_if;

        priv->speed             = phy2speed[mac_dev->phy_if];
        priv->max_speed         = priv->speed;
        mac_dev->if_support     = DTSEC_SUPPORTED;
        /* We don't support half-duplex in SGMII mode */
        if (mac_dev->phy_if == PHY_INTERFACE_MODE_SGMII)
                mac_dev->if_support &= ~(SUPPORTED_10baseT_Half |
                                        SUPPORTED_100baseT_Half);

        /* Gigabit support (no half-duplex) */
        if (priv->max_speed == 1000)
                mac_dev->if_support |= SUPPORTED_1000baseT_Full;

        /* The 10G interface only supports one mode */
        if (mac_dev->phy_if == PHY_INTERFACE_MODE_XGMII)
                mac_dev->if_support = SUPPORTED_10000baseT_Full;

        /* Get the rest of the PHY information */
        mac_dev->phy_node = of_parse_phandle(mac_node, "phy-handle", 0);
        if (!mac_dev->phy_node && of_phy_is_fixed_link(mac_node)) {
                struct phy_device *phy;

                err = of_phy_register_fixed_link(mac_node);
                if (err)
                        goto _return_of_get_parent;

                priv->fixed_link = kzalloc(sizeof(*priv->fixed_link),
                                           GFP_KERNEL);
                if (!priv->fixed_link) {
                        err = -ENOMEM;
                        goto _return_of_get_parent;
                }

                mac_dev->phy_node = of_node_get(mac_node);
                phy = of_phy_find_device(mac_dev->phy_node);
                if (!phy) {
                        err = -EINVAL;
                        of_node_put(mac_dev->phy_node);
                        goto _return_of_get_parent;
                }

                priv->fixed_link->link = phy->link;
                priv->fixed_link->speed = phy->speed;
                priv->fixed_link->duplex = phy->duplex;
                priv->fixed_link->pause = phy->pause;
                priv->fixed_link->asym_pause = phy->asym_pause;

                put_device(&phy->mdio.dev);
        }

        err = mac_dev->init(mac_dev);
        if (err < 0) {
                dev_err(dev, "mac_dev->init() = %d\n", err);
                of_node_put(mac_dev->phy_node);
                goto _return_of_get_parent;
        }

        /* pause frame autonegotiation enabled */
        mac_dev->autoneg_pause = true;

        /* By intializing the values to false, force FMD to enable PAUSE frames
         * on RX and TX
         */
        mac_dev->rx_pause_req = true;
        mac_dev->tx_pause_req = true;
        mac_dev->rx_pause_active = false;
        mac_dev->tx_pause_active = false;
        err = fman_set_mac_active_pause(mac_dev, true, true);
        if (err < 0)
                dev_err(dev, "fman_set_mac_active_pause() = %d\n", err);

        dev_info(dev, "FMan MAC address: %02hx:%02hx:%02hx:%02hx:%02hx:%02hx\n",
                 mac_dev->addr[0], mac_dev->addr[1], mac_dev->addr[2],
                 mac_dev->addr[3], mac_dev->addr[4], mac_dev->addr[5]);

        priv->eth_dev = dpaa_eth_add_device(fman_id, mac_dev);
        if (IS_ERR(priv->eth_dev)) {
                dev_err(dev, "failed to add Ethernet platform device for MAC %d\n",
                        priv->cell_index);
                priv->eth_dev = NULL;
        }

        goto _return;

_return_of_node_put:
        of_node_put(dev_node);
_return_of_get_parent:
        kfree(priv->fixed_link);
_return:
        return err;
}

static struct platform_driver mac_driver = {
        .driver = {
                .name           = KBUILD_MODNAME,
                .of_match_table = mac_match,
        },
        .probe          = mac_probe,
};

builtin_platform_driver(mac_driver);