// SPDX-License-Identifier: GPL-2.0
/*
 * Lantiq / Intel GSWIP switch driver for VRX200, xRX300 and xRX330 SoCs
 *
 * Copyright (C) 2010 Lantiq Deutschland
 * Copyright (C) 2012 John Crispin <john@phrozen.org>
 * Copyright (C) 2017 - 2019 Hauke Mehrtens <hauke@hauke-m.de>
 *
 * The VLAN and bridge model the GSWIP hardware uses does not directly
 * matches the model DSA uses.
 *
 * The hardware has 64 possible table entries for bridges with one VLAN
 * ID, one flow id and a list of ports for each bridge. All entries which
 * match the same flow ID are combined in the mac learning table, they
 * act as one global bridge.
 * The hardware does not support VLAN filter on the port, but on the
 * bridge, this driver converts the DSA model to the hardware.
 *
 * The CPU gets all the exception frames which do not match any forwarding
 * rule and the CPU port is also added to all bridges. This makes it possible
 * to handle all the special cases easily in software.
 * At the initialization the driver allocates one bridge table entry for
 * each switch port which is used when the port is used without an
 * explicit bridge. This prevents the frames from being forwarded
 * between all LAN ports by default.
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/etherdevice.h>
#include <linux/firmware.h>
#include <linux/if_bridge.h>
#include <linux/if_vlan.h>
#include <linux/iopoll.h>
#include <linux/mfd/syscon.h>
#include <linux/module.h>
#include <linux/of_mdio.h>
#include <linux/of_net.h>
#include <linux/of_platform.h>
#include <linux/phy.h>
#include <linux/phylink.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <net/dsa.h>
#include <dt-bindings/mips/lantiq_rcu_gphy.h>

#include "lantiq_pce.h"

/* GSWIP MDIO Registers */
#define GSWIP_MDIO_GLOB                 0x00
#define  GSWIP_MDIO_GLOB_ENABLE         BIT(15)
#define GSWIP_MDIO_CTRL                 0x08
#define  GSWIP_MDIO_CTRL_BUSY           BIT(12)
#define  GSWIP_MDIO_CTRL_RD             BIT(11)
#define  GSWIP_MDIO_CTRL_WR             BIT(10)
#define  GSWIP_MDIO_CTRL_PHYAD_MASK     0x1f
#define  GSWIP_MDIO_CTRL_PHYAD_SHIFT    5
#define  GSWIP_MDIO_CTRL_REGAD_MASK     0x1f
#define GSWIP_MDIO_READ                 0x09
#define GSWIP_MDIO_WRITE                0x0A
#define GSWIP_MDIO_MDC_CFG0             0x0B
#define GSWIP_MDIO_MDC_CFG1             0x0C
#define GSWIP_MDIO_PHYp(p)              (0x15 - (p))
#define  GSWIP_MDIO_PHY_LINK_MASK       0x6000
#define  GSWIP_MDIO_PHY_LINK_AUTO       0x0000
#define  GSWIP_MDIO_PHY_LINK_DOWN       0x4000
#define  GSWIP_MDIO_PHY_LINK_UP         0x2000
#define  GSWIP_MDIO_PHY_SPEED_MASK      0x1800
#define  GSWIP_MDIO_PHY_SPEED_AUTO      0x1800
#define  GSWIP_MDIO_PHY_SPEED_M10       0x0000
#define  GSWIP_MDIO_PHY_SPEED_M100      0x0800
#define  GSWIP_MDIO_PHY_SPEED_G1        0x1000
#define  GSWIP_MDIO_PHY_FDUP_MASK       0x0600
#define  GSWIP_MDIO_PHY_FDUP_AUTO       0x0000
#define  GSWIP_MDIO_PHY_FDUP_EN         0x0200
#define  GSWIP_MDIO_PHY_FDUP_DIS        0x0600
#define  GSWIP_MDIO_PHY_FCONTX_MASK     0x0180
#define  GSWIP_MDIO_PHY_FCONTX_AUTO     0x0000
#define  GSWIP_MDIO_PHY_FCONTX_EN       0x0100
#define  GSWIP_MDIO_PHY_FCONTX_DIS      0x0180
#define  GSWIP_MDIO_PHY_FCONRX_MASK     0x0060
#define  GSWIP_MDIO_PHY_FCONRX_AUTO     0x0000
#define  GSWIP_MDIO_PHY_FCONRX_EN       0x0020
#define  GSWIP_MDIO_PHY_FCONRX_DIS      0x0060
#define  GSWIP_MDIO_PHY_ADDR_MASK       0x001f
#define  GSWIP_MDIO_PHY_MASK            (GSWIP_MDIO_PHY_ADDR_MASK | \
                                         GSWIP_MDIO_PHY_FCONRX_MASK | \
                                         GSWIP_MDIO_PHY_FCONTX_MASK | \
                                         GSWIP_MDIO_PHY_LINK_MASK | \
                                         GSWIP_MDIO_PHY_SPEED_MASK | \
                                         GSWIP_MDIO_PHY_FDUP_MASK)

/* GSWIP MII Registers */
#define GSWIP_MII_CFGp(p)               (0x2 * (p))
#define  GSWIP_MII_CFG_RESET            BIT(15)
#define  GSWIP_MII_CFG_EN               BIT(14)
#define  GSWIP_MII_CFG_ISOLATE          BIT(13)
#define  GSWIP_MII_CFG_LDCLKDIS         BIT(12)
#define  GSWIP_MII_CFG_RGMII_IBS        BIT(8)
#define  GSWIP_MII_CFG_RMII_CLK         BIT(7)
#define  GSWIP_MII_CFG_MODE_MIIP        0x0
#define  GSWIP_MII_CFG_MODE_MIIM        0x1
#define  GSWIP_MII_CFG_MODE_RMIIP       0x2
#define  GSWIP_MII_CFG_MODE_RMIIM       0x3
#define  GSWIP_MII_CFG_MODE_RGMII       0x4
#define  GSWIP_MII_CFG_MODE_GMII        0x9
#define  GSWIP_MII_CFG_MODE_MASK        0xf
#define  GSWIP_MII_CFG_RATE_M2P5        0x00
#define  GSWIP_MII_CFG_RATE_M25 0x10
#define  GSWIP_MII_CFG_RATE_M125        0x20
#define  GSWIP_MII_CFG_RATE_M50 0x30
#define  GSWIP_MII_CFG_RATE_AUTO        0x40
#define  GSWIP_MII_CFG_RATE_MASK        0x70
#define GSWIP_MII_PCDU0                 0x01
#define GSWIP_MII_PCDU1                 0x03
#define GSWIP_MII_PCDU5                 0x05
#define  GSWIP_MII_PCDU_TXDLY_MASK      GENMASK(2, 0)
#define  GSWIP_MII_PCDU_RXDLY_MASK      GENMASK(9, 7)

/* GSWIP Core Registers */
#define GSWIP_SWRES                     0x000
#define  GSWIP_SWRES_R1                 BIT(1)  /* GSWIP Software reset */
#define  GSWIP_SWRES_R0                 BIT(0)  /* GSWIP Hardware reset */
#define GSWIP_VERSION                   0x013
#define  GSWIP_VERSION_REV_SHIFT        0
#define  GSWIP_VERSION_REV_MASK         GENMASK(7, 0)
#define  GSWIP_VERSION_MOD_SHIFT        8
#define  GSWIP_VERSION_MOD_MASK         GENMASK(15, 8)
#define   GSWIP_VERSION_2_0             0x100
#define   GSWIP_VERSION_2_1             0x021
#define   GSWIP_VERSION_2_2             0x122
#define   GSWIP_VERSION_2_2_ETC         0x022

#define GSWIP_BM_RAM_VAL(x)             (0x043 - (x))
#define GSWIP_BM_RAM_ADDR               0x044
#define GSWIP_BM_RAM_CTRL               0x045
#define  GSWIP_BM_RAM_CTRL_BAS          BIT(15)
#define  GSWIP_BM_RAM_CTRL_OPMOD        BIT(5)
#define  GSWIP_BM_RAM_CTRL_ADDR_MASK    GENMASK(4, 0)
#define GSWIP_BM_QUEUE_GCTRL            0x04A
#define  GSWIP_BM_QUEUE_GCTRL_GL_MOD    BIT(10)
/* buffer management Port Configuration Register */
#define GSWIP_BM_PCFGp(p)               (0x080 + ((p) * 2))
#define  GSWIP_BM_PCFG_CNTEN            BIT(0)  /* RMON Counter Enable */
#define  GSWIP_BM_PCFG_IGCNT            BIT(1)  /* Ingres Special Tag RMON count */
/* buffer management Port Control Register */
#define GSWIP_BM_RMON_CTRLp(p)          (0x81 + ((p) * 2))
#define  GSWIP_BM_CTRL_RMON_RAM1_RES    BIT(0)  /* Software Reset for RMON RAM 1 */
#define  GSWIP_BM_CTRL_RMON_RAM2_RES    BIT(1)  /* Software Reset for RMON RAM 2 */

/* PCE */
#define GSWIP_PCE_TBL_KEY(x)            (0x447 - (x))
#define GSWIP_PCE_TBL_MASK              0x448
#define GSWIP_PCE_TBL_VAL(x)            (0x44D - (x))
#define GSWIP_PCE_TBL_ADDR              0x44E
#define GSWIP_PCE_TBL_CTRL              0x44F
#define  GSWIP_PCE_TBL_CTRL_BAS         BIT(15)
#define  GSWIP_PCE_TBL_CTRL_TYPE        BIT(13)
#define  GSWIP_PCE_TBL_CTRL_VLD         BIT(12)
#define  GSWIP_PCE_TBL_CTRL_KEYFORM     BIT(11)
#define  GSWIP_PCE_TBL_CTRL_GMAP_MASK   GENMASK(10, 7)
#define  GSWIP_PCE_TBL_CTRL_OPMOD_MASK  GENMASK(6, 5)
#define  GSWIP_PCE_TBL_CTRL_OPMOD_ADRD  0x00
#define  GSWIP_PCE_TBL_CTRL_OPMOD_ADWR  0x20
#define  GSWIP_PCE_TBL_CTRL_OPMOD_KSRD  0x40
#define  GSWIP_PCE_TBL_CTRL_OPMOD_KSWR  0x60
#define  GSWIP_PCE_TBL_CTRL_ADDR_MASK   GENMASK(4, 0)
#define GSWIP_PCE_PMAP1                 0x453   /* Monitoring port map */
#define GSWIP_PCE_PMAP2                 0x454   /* Default Multicast port map */
#define GSWIP_PCE_PMAP3                 0x455   /* Default Unknown Unicast port map */
#define GSWIP_PCE_GCTRL_0               0x456
#define  GSWIP_PCE_GCTRL_0_MTFL         BIT(0)  /* MAC Table Flushing */
#define  GSWIP_PCE_GCTRL_0_MC_VALID     BIT(3)
#define  GSWIP_PCE_GCTRL_0_VLAN         BIT(14) /* VLAN aware Switching */
#define GSWIP_PCE_GCTRL_1               0x457
#define  GSWIP_PCE_GCTRL_1_MAC_GLOCK    BIT(2)  /* MAC Address table lock */
#define  GSWIP_PCE_GCTRL_1_MAC_GLOCK_MOD        BIT(3) /* Mac address table lock forwarding mode */
#define GSWIP_PCE_PCTRL_0p(p)           (0x480 + ((p) * 0xA))
#define  GSWIP_PCE_PCTRL_0_TVM          BIT(5)  /* Transparent VLAN mode */
#define  GSWIP_PCE_PCTRL_0_VREP         BIT(6)  /* VLAN Replace Mode */
#define  GSWIP_PCE_PCTRL_0_INGRESS      BIT(11) /* Accept special tag in ingress */
#define  GSWIP_PCE_PCTRL_0_PSTATE_LISTEN        0x0
#define  GSWIP_PCE_PCTRL_0_PSTATE_RX            0x1
#define  GSWIP_PCE_PCTRL_0_PSTATE_TX            0x2
#define  GSWIP_PCE_PCTRL_0_PSTATE_LEARNING      0x3
#define  GSWIP_PCE_PCTRL_0_PSTATE_FORWARDING    0x7
#define  GSWIP_PCE_PCTRL_0_PSTATE_MASK  GENMASK(2, 0)
#define GSWIP_PCE_VCTRL(p)              (0x485 + ((p) * 0xA))
#define  GSWIP_PCE_VCTRL_UVR            BIT(0)  /* Unknown VLAN Rule */
#define  GSWIP_PCE_VCTRL_VIMR           BIT(3)  /* VLAN Ingress Member violation rule */
#define  GSWIP_PCE_VCTRL_VEMR           BIT(4)  /* VLAN Egress Member violation rule */
#define  GSWIP_PCE_VCTRL_VSR            BIT(5)  /* VLAN Security */
#define  GSWIP_PCE_VCTRL_VID0           BIT(6)  /* Priority Tagged Rule */
#define GSWIP_PCE_DEFPVID(p)            (0x486 + ((p) * 0xA))

#define GSWIP_MAC_FLEN                  0x8C5
#define GSWIP_MAC_CTRL_0p(p)            (0x903 + ((p) * 0xC))
#define  GSWIP_MAC_CTRL_0_PADEN         BIT(8)
#define  GSWIP_MAC_CTRL_0_FCS_EN        BIT(7)
#define  GSWIP_MAC_CTRL_0_FCON_MASK     0x0070
#define  GSWIP_MAC_CTRL_0_FCON_AUTO     0x0000
#define  GSWIP_MAC_CTRL_0_FCON_RX       0x0010
#define  GSWIP_MAC_CTRL_0_FCON_TX       0x0020
#define  GSWIP_MAC_CTRL_0_FCON_RXTX     0x0030
#define  GSWIP_MAC_CTRL_0_FCON_NONE     0x0040
#define  GSWIP_MAC_CTRL_0_FDUP_MASK     0x000C
#define  GSWIP_MAC_CTRL_0_FDUP_AUTO     0x0000
#define  GSWIP_MAC_CTRL_0_FDUP_EN       0x0004
#define  GSWIP_MAC_CTRL_0_FDUP_DIS      0x000C
#define  GSWIP_MAC_CTRL_0_GMII_MASK     0x0003
#define  GSWIP_MAC_CTRL_0_GMII_AUTO     0x0000
#define  GSWIP_MAC_CTRL_0_GMII_MII      0x0001
#define  GSWIP_MAC_CTRL_0_GMII_RGMII    0x0002
#define GSWIP_MAC_CTRL_2p(p)            (0x905 + ((p) * 0xC))
#define GSWIP_MAC_CTRL_2_LCHKL          BIT(2) /* Frame Length Check Long Enable */
#define GSWIP_MAC_CTRL_2_MLEN           BIT(3) /* Maximum Untagged Frame Lnegth */

/* Ethernet Switch Fetch DMA Port Control Register */
#define GSWIP_FDMA_PCTRLp(p)            (0xA80 + ((p) * 0x6))
#define  GSWIP_FDMA_PCTRL_EN            BIT(0)  /* FDMA Port Enable */
#define  GSWIP_FDMA_PCTRL_STEN          BIT(1)  /* Special Tag Insertion Enable */
#define  GSWIP_FDMA_PCTRL_VLANMOD_MASK  GENMASK(4, 3)   /* VLAN Modification Control */
#define  GSWIP_FDMA_PCTRL_VLANMOD_SHIFT 3       /* VLAN Modification Control */
#define  GSWIP_FDMA_PCTRL_VLANMOD_DIS   (0x0 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define  GSWIP_FDMA_PCTRL_VLANMOD_PRIO  (0x1 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define  GSWIP_FDMA_PCTRL_VLANMOD_ID    (0x2 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)
#define  GSWIP_FDMA_PCTRL_VLANMOD_BOTH  (0x3 << GSWIP_FDMA_PCTRL_VLANMOD_SHIFT)

/* Ethernet Switch Store DMA Port Control Register */
#define GSWIP_SDMA_PCTRLp(p)            (0xBC0 + ((p) * 0x6))
#define  GSWIP_SDMA_PCTRL_EN            BIT(0)  /* SDMA Port Enable */
#define  GSWIP_SDMA_PCTRL_FCEN          BIT(1)  /* Flow Control Enable */
#define  GSWIP_SDMA_PCTRL_PAUFWD        BIT(3)  /* Pause Frame Forwarding */

#define GSWIP_TABLE_ACTIVE_VLAN         0x01
#define GSWIP_TABLE_VLAN_MAPPING        0x02
#define GSWIP_TABLE_MAC_BRIDGE          0x0b
#define  GSWIP_TABLE_MAC_BRIDGE_STATIC  0x01    /* Static not, aging entry */

#define XRX200_GPHY_FW_ALIGN    (16 * 1024)

/* Maximum packet size supported by the switch. In theory this should be 10240,
 * but long packets currently cause lock-ups with an MTU of over 2526. Medium
 * packets are sometimes dropped (e.g. TCP over 2477, UDP over 2516-2519, ICMP
 * over 2526), hence an MTU value of 2400 seems safe. This issue only affects
 * packet reception. This is probably caused by the PPA engine, which is on the
 * RX part of the device. Packet transmission works properly up to 10240.
 */
#define GSWIP_MAX_PACKET_LENGTH 2400

struct gswip_hw_info {
        int max_ports;
        int cpu_port;
        const struct dsa_switch_ops *ops;
};

struct xway_gphy_match_data {
        char *fe_firmware_name;
        char *ge_firmware_name;
};

struct gswip_gphy_fw {
        struct clk *clk_gate;
        struct reset_control *reset;
        u32 fw_addr_offset;
        char *fw_name;
};

struct gswip_vlan {
        struct net_device *bridge;
        u16 vid;
        u8 fid;
};

struct gswip_priv {
        __iomem void *gswip;
        __iomem void *mdio;
        __iomem void *mii;
        const struct gswip_hw_info *hw_info;
        const struct xway_gphy_match_data *gphy_fw_name_cfg;
        struct dsa_switch *ds;
        struct device *dev;
        struct regmap *rcu_regmap;
        struct gswip_vlan vlans[64];
        int num_gphy_fw;
        struct gswip_gphy_fw *gphy_fw;
        u32 port_vlan_filter;
        struct mutex pce_table_lock;
};

struct gswip_pce_table_entry {
        u16 index;      // PCE_TBL_ADDR.ADDR = pData->table_index
        u16 table;      // PCE_TBL_CTRL.ADDR = pData->table
        u16 key[8];
        u16 val[5];
        u16 mask;
        u8 gmap;
        bool type;
        bool valid;
        bool key_mode;
};

struct gswip_rmon_cnt_desc {
        unsigned int size;
        unsigned int offset;
        const char *name;
};

#define MIB_DESC(_size, _offset, _name) {.size = _size, .offset = _offset, .name = _name}

static const struct gswip_rmon_cnt_desc gswip_rmon_cnt[] = {
        /** Receive Packet Count (only packets that are accepted and not discarded). */
        MIB_DESC(1, 0x1F, "RxGoodPkts"),
        MIB_DESC(1, 0x23, "RxUnicastPkts"),
        MIB_DESC(1, 0x22, "RxMulticastPkts"),
        MIB_DESC(1, 0x21, "RxFCSErrorPkts"),
        MIB_DESC(1, 0x1D, "RxUnderSizeGoodPkts"),
        MIB_DESC(1, 0x1E, "RxUnderSizeErrorPkts"),
        MIB_DESC(1, 0x1B, "RxOversizeGoodPkts"),
        MIB_DESC(1, 0x1C, "RxOversizeErrorPkts"),
        MIB_DESC(1, 0x20, "RxGoodPausePkts"),
        MIB_DESC(1, 0x1A, "RxAlignErrorPkts"),
        MIB_DESC(1, 0x12, "Rx64BytePkts"),
        MIB_DESC(1, 0x13, "Rx127BytePkts"),
        MIB_DESC(1, 0x14, "Rx255BytePkts"),
        MIB_DESC(1, 0x15, "Rx511BytePkts"),
        MIB_DESC(1, 0x16, "Rx1023BytePkts"),
        /** Receive Size 1024-1522 (or more, if configured) Packet Count. */
        MIB_DESC(1, 0x17, "RxMaxBytePkts"),
        MIB_DESC(1, 0x18, "RxDroppedPkts"),
        MIB_DESC(1, 0x19, "RxFilteredPkts"),
        MIB_DESC(2, 0x24, "RxGoodBytes"),
        MIB_DESC(2, 0x26, "RxBadBytes"),
        MIB_DESC(1, 0x11, "TxAcmDroppedPkts"),
        MIB_DESC(1, 0x0C, "TxGoodPkts"),
        MIB_DESC(1, 0x06, "TxUnicastPkts"),
        MIB_DESC(1, 0x07, "TxMulticastPkts"),
        MIB_DESC(1, 0x00, "Tx64BytePkts"),
        MIB_DESC(1, 0x01, "Tx127BytePkts"),
        MIB_DESC(1, 0x02, "Tx255BytePkts"),
        MIB_DESC(1, 0x03, "Tx511BytePkts"),
        MIB_DESC(1, 0x04, "Tx1023BytePkts"),
        /** Transmit Size 1024-1522 (or more, if configured) Packet Count. */
        MIB_DESC(1, 0x05, "TxMaxBytePkts"),
        MIB_DESC(1, 0x08, "TxSingleCollCount"),
        MIB_DESC(1, 0x09, "TxMultCollCount"),
        MIB_DESC(1, 0x0A, "TxLateCollCount"),
        MIB_DESC(1, 0x0B, "TxExcessCollCount"),
        MIB_DESC(1, 0x0D, "TxPauseCount"),
        MIB_DESC(1, 0x10, "TxDroppedPkts"),
        MIB_DESC(2, 0x0E, "TxGoodBytes"),
};

static u32 gswip_switch_r(struct gswip_priv *priv, u32 offset)
{
        return __raw_readl(priv->gswip + (offset * 4));
}

static void gswip_switch_w(struct gswip_priv *priv, u32 val, u32 offset)
{
        __raw_writel(val, priv->gswip + (offset * 4));
}

static void gswip_switch_mask(struct gswip_priv *priv, u32 clear, u32 set,
                              u32 offset)
{
        u32 val = gswip_switch_r(priv, offset);

        val &= ~(clear);
        val |= set;
        gswip_switch_w(priv, val, offset);
}

static u32 gswip_switch_r_timeout(struct gswip_priv *priv, u32 offset,
                                  u32 cleared)
{
        u32 val;

        return readx_poll_timeout(__raw_readl, priv->gswip + (offset * 4), val,
                                  (val & cleared) == 0, 20, 50000);
}

static u32 gswip_mdio_r(struct gswip_priv *priv, u32 offset)
{
        return __raw_readl(priv->mdio + (offset * 4));
}

static void gswip_mdio_w(struct gswip_priv *priv, u32 val, u32 offset)
{
        __raw_writel(val, priv->mdio + (offset * 4));
}

static void gswip_mdio_mask(struct gswip_priv *priv, u32 clear, u32 set,
                            u32 offset)
{
        u32 val = gswip_mdio_r(priv, offset);

        val &= ~(clear);
        val |= set;
        gswip_mdio_w(priv, val, offset);
}

static u32 gswip_mii_r(struct gswip_priv *priv, u32 offset)
{
        return __raw_readl(priv->mii + (offset * 4));
}

static void gswip_mii_w(struct gswip_priv *priv, u32 val, u32 offset)
{
        __raw_writel(val, priv->mii + (offset * 4));
}

static void gswip_mii_mask(struct gswip_priv *priv, u32 clear, u32 set,
                           u32 offset)
{
        u32 val = gswip_mii_r(priv, offset);

        val &= ~(clear);
        val |= set;
        gswip_mii_w(priv, val, offset);
}

static void gswip_mii_mask_cfg(struct gswip_priv *priv, u32 clear, u32 set,
                               int port)
{
        /* There's no MII_CFG register for the CPU port */
        if (!dsa_is_cpu_port(priv->ds, port))
                gswip_mii_mask(priv, clear, set, GSWIP_MII_CFGp(port));
}

static void gswip_mii_mask_pcdu(struct gswip_priv *priv, u32 clear, u32 set,
                                int port)
{
        switch (port) {
        case 0:
                gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU0);
                break;
        case 1:
                gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU1);
                break;
        case 5:
                gswip_mii_mask(priv, clear, set, GSWIP_MII_PCDU5);
                break;
        }
}

static int gswip_mdio_poll(struct gswip_priv *priv)
{
        int cnt = 100;

        while (likely(cnt--)) {
                u32 ctrl = gswip_mdio_r(priv, GSWIP_MDIO_CTRL);

                if ((ctrl & GSWIP_MDIO_CTRL_BUSY) == 0)
                        return 0;
                usleep_range(20, 40);
        }

        return -ETIMEDOUT;
}

static int gswip_mdio_wr(struct mii_bus *bus, int addr, int reg, u16 val)
{
        struct gswip_priv *priv = bus->priv;
        int err;

        err = gswip_mdio_poll(priv);
        if (err) {
                dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
                return err;
        }

        gswip_mdio_w(priv, val, GSWIP_MDIO_WRITE);
        gswip_mdio_w(priv, GSWIP_MDIO_CTRL_BUSY | GSWIP_MDIO_CTRL_WR |
                ((addr & GSWIP_MDIO_CTRL_PHYAD_MASK) << GSWIP_MDIO_CTRL_PHYAD_SHIFT) |
                (reg & GSWIP_MDIO_CTRL_REGAD_MASK),
                GSWIP_MDIO_CTRL);

        return 0;
}

static int gswip_mdio_rd(struct mii_bus *bus, int addr, int reg)
{
        struct gswip_priv *priv = bus->priv;
        int err;

        err = gswip_mdio_poll(priv);
        if (err) {
                dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
                return err;
        }

        gswip_mdio_w(priv, GSWIP_MDIO_CTRL_BUSY | GSWIP_MDIO_CTRL_RD |
                ((addr & GSWIP_MDIO_CTRL_PHYAD_MASK) << GSWIP_MDIO_CTRL_PHYAD_SHIFT) |
                (reg & GSWIP_MDIO_CTRL_REGAD_MASK),
                GSWIP_MDIO_CTRL);

        err = gswip_mdio_poll(priv);
        if (err) {
                dev_err(&bus->dev, "waiting for MDIO bus busy timed out\n");
                return err;
        }

        return gswip_mdio_r(priv, GSWIP_MDIO_READ);
}

static int gswip_mdio(struct gswip_priv *priv, struct device_node *mdio_np)
{
        struct dsa_switch *ds = priv->ds;
        int err;

        ds->slave_mii_bus = mdiobus_alloc();
        if (!ds->slave_mii_bus)
                return -ENOMEM;

        ds->slave_mii_bus->priv = priv;
        ds->slave_mii_bus->read = gswip_mdio_rd;
        ds->slave_mii_bus->write = gswip_mdio_wr;
        ds->slave_mii_bus->name = "lantiq,xrx200-mdio";
        snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "%s-mii",
                 dev_name(priv->dev));
        ds->slave_mii_bus->parent = priv->dev;
        ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;

        err = of_mdiobus_register(ds->slave_mii_bus, mdio_np);
        if (err)
                mdiobus_free(ds->slave_mii_bus);

        return err;
}

static int gswip_pce_table_entry_read(struct gswip_priv *priv,
                                      struct gswip_pce_table_entry *tbl)
{
        int i;
        int err;
        u16 crtl;
        u16 addr_mode = tbl->key_mode ? GSWIP_PCE_TBL_CTRL_OPMOD_KSRD :
                                        GSWIP_PCE_TBL_CTRL_OPMOD_ADRD;

        mutex_lock(&priv->pce_table_lock);

        err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
                                     GSWIP_PCE_TBL_CTRL_BAS);
        if (err) {
                mutex_unlock(&priv->pce_table_lock);
                return err;
        }

        gswip_switch_w(priv, tbl->index, GSWIP_PCE_TBL_ADDR);
        gswip_switch_mask(priv, GSWIP_PCE_TBL_CTRL_ADDR_MASK |
                                GSWIP_PCE_TBL_CTRL_OPMOD_MASK,
                          tbl->table | addr_mode | GSWIP_PCE_TBL_CTRL_BAS,
                          GSWIP_PCE_TBL_CTRL);

        err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
                                     GSWIP_PCE_TBL_CTRL_BAS);
        if (err) {
                mutex_unlock(&priv->pce_table_lock);
                return err;
        }

        for (i = 0; i < ARRAY_SIZE(tbl->key); i++)
                tbl->key[i] = gswip_switch_r(priv, GSWIP_PCE_TBL_KEY(i));

        for (i = 0; i < ARRAY_SIZE(tbl->val); i++)
                tbl->val[i] = gswip_switch_r(priv, GSWIP_PCE_TBL_VAL(i));

        tbl->mask = gswip_switch_r(priv, GSWIP_PCE_TBL_MASK);

        crtl = gswip_switch_r(priv, GSWIP_PCE_TBL_CTRL);

        tbl->type = !!(crtl & GSWIP_PCE_TBL_CTRL_TYPE);
        tbl->valid = !!(crtl & GSWIP_PCE_TBL_CTRL_VLD);
        tbl->gmap = (crtl & GSWIP_PCE_TBL_CTRL_GMAP_MASK) >> 7;

        mutex_unlock(&priv->pce_table_lock);

        return 0;
}

static int gswip_pce_table_entry_write(struct gswip_priv *priv,
                                       struct gswip_pce_table_entry *tbl)
{
        int i;
        int err;
        u16 crtl;
        u16 addr_mode = tbl->key_mode ? GSWIP_PCE_TBL_CTRL_OPMOD_KSWR :
                                        GSWIP_PCE_TBL_CTRL_OPMOD_ADWR;

        mutex_lock(&priv->pce_table_lock);

        err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
                                     GSWIP_PCE_TBL_CTRL_BAS);
        if (err) {
                mutex_unlock(&priv->pce_table_lock);
                return err;
        }

        gswip_switch_w(priv, tbl->index, GSWIP_PCE_TBL_ADDR);
        gswip_switch_mask(priv, GSWIP_PCE_TBL_CTRL_ADDR_MASK |
                                GSWIP_PCE_TBL_CTRL_OPMOD_MASK,
                          tbl->table | addr_mode,
                          GSWIP_PCE_TBL_CTRL);

        for (i = 0; i < ARRAY_SIZE(tbl->key); i++)
                gswip_switch_w(priv, tbl->key[i], GSWIP_PCE_TBL_KEY(i));

        for (i = 0; i < ARRAY_SIZE(tbl->val); i++)
                gswip_switch_w(priv, tbl->val[i], GSWIP_PCE_TBL_VAL(i));

        gswip_switch_mask(priv, GSWIP_PCE_TBL_CTRL_ADDR_MASK |
                                GSWIP_PCE_TBL_CTRL_OPMOD_MASK,
                          tbl->table | addr_mode,
                          GSWIP_PCE_TBL_CTRL);

        gswip_switch_w(priv, tbl->mask, GSWIP_PCE_TBL_MASK);

        crtl = gswip_switch_r(priv, GSWIP_PCE_TBL_CTRL);
        crtl &= ~(GSWIP_PCE_TBL_CTRL_TYPE | GSWIP_PCE_TBL_CTRL_VLD |
                  GSWIP_PCE_TBL_CTRL_GMAP_MASK);
        if (tbl->type)
                crtl |= GSWIP_PCE_TBL_CTRL_TYPE;
        if (tbl->valid)
                crtl |= GSWIP_PCE_TBL_CTRL_VLD;
        crtl |= (tbl->gmap << 7) & GSWIP_PCE_TBL_CTRL_GMAP_MASK;
        crtl |= GSWIP_PCE_TBL_CTRL_BAS;
        gswip_switch_w(priv, crtl, GSWIP_PCE_TBL_CTRL);

        err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
                                     GSWIP_PCE_TBL_CTRL_BAS);

        mutex_unlock(&priv->pce_table_lock);

        return err;
}

/* Add the LAN port into a bridge with the CPU port by
 * default. This prevents automatic forwarding of
 * packages between the LAN ports when no explicit
 * bridge is configured.
 */
static int gswip_add_single_port_br(struct gswip_priv *priv, int port, bool add)
{
        struct gswip_pce_table_entry vlan_active = {0,};
        struct gswip_pce_table_entry vlan_mapping = {0,};
        unsigned int cpu_port = priv->hw_info->cpu_port;
        unsigned int max_ports = priv->hw_info->max_ports;
        int err;

        if (port >= max_ports) {
                dev_err(priv->dev, "single port for %i supported\n", port);
                return -EIO;
        }

        vlan_active.index = port + 1;
        vlan_active.table = GSWIP_TABLE_ACTIVE_VLAN;
        vlan_active.key[0] = 0; /* vid */
        vlan_active.val[0] = port + 1 /* fid */;
        vlan_active.valid = add;
        err = gswip_pce_table_entry_write(priv, &vlan_active);
        if (err) {
                dev_err(priv->dev, "failed to write active VLAN: %d\n", err);
                return err;
        }

        if (!add)
                return 0;

        vlan_mapping.index = port + 1;
        vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
        vlan_mapping.val[0] = 0 /* vid */;
        vlan_mapping.val[1] = BIT(port) | BIT(cpu_port);
        vlan_mapping.val[2] = 0;
        err = gswip_pce_table_entry_write(priv, &vlan_mapping);
        if (err) {
                dev_err(priv->dev, "failed to write VLAN mapping: %d\n", err);
                return err;
        }

        return 0;
}

static int gswip_port_enable(struct dsa_switch *ds, int port,
                             struct phy_device *phydev)
{
        struct gswip_priv *priv = ds->priv;
        int err;

        if (!dsa_is_user_port(ds, port))
                return 0;

        if (!dsa_is_cpu_port(ds, port)) {
                err = gswip_add_single_port_br(priv, port, true);
                if (err)
                        return err;
        }

        /* RMON Counter Enable for port */
        gswip_switch_w(priv, GSWIP_BM_PCFG_CNTEN, GSWIP_BM_PCFGp(port));

        /* enable port fetch/store dma & VLAN Modification */
        gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_EN |
                                   GSWIP_FDMA_PCTRL_VLANMOD_BOTH,
                         GSWIP_FDMA_PCTRLp(port));
        gswip_switch_mask(priv, 0, GSWIP_SDMA_PCTRL_EN,
                          GSWIP_SDMA_PCTRLp(port));

        if (!dsa_is_cpu_port(ds, port)) {
                u32 mdio_phy = 0;

                if (phydev)
                        mdio_phy = phydev->mdio.addr & GSWIP_MDIO_PHY_ADDR_MASK;

                gswip_mdio_mask(priv, GSWIP_MDIO_PHY_ADDR_MASK, mdio_phy,
                                GSWIP_MDIO_PHYp(port));
        }

        return 0;
}

static void gswip_port_disable(struct dsa_switch *ds, int port)
{
        struct gswip_priv *priv = ds->priv;

        if (!dsa_is_user_port(ds, port))
                return;

        gswip_switch_mask(priv, GSWIP_FDMA_PCTRL_EN, 0,
                          GSWIP_FDMA_PCTRLp(port));
        gswip_switch_mask(priv, GSWIP_SDMA_PCTRL_EN, 0,
                          GSWIP_SDMA_PCTRLp(port));
}

static int gswip_pce_load_microcode(struct gswip_priv *priv)
{
        int i;
        int err;

        gswip_switch_mask(priv, GSWIP_PCE_TBL_CTRL_ADDR_MASK |
                                GSWIP_PCE_TBL_CTRL_OPMOD_MASK,
                          GSWIP_PCE_TBL_CTRL_OPMOD_ADWR, GSWIP_PCE_TBL_CTRL);
        gswip_switch_w(priv, 0, GSWIP_PCE_TBL_MASK);

        for (i = 0; i < ARRAY_SIZE(gswip_pce_microcode); i++) {
                gswip_switch_w(priv, i, GSWIP_PCE_TBL_ADDR);
                gswip_switch_w(priv, gswip_pce_microcode[i].val_0,
                               GSWIP_PCE_TBL_VAL(0));
                gswip_switch_w(priv, gswip_pce_microcode[i].val_1,
                               GSWIP_PCE_TBL_VAL(1));
                gswip_switch_w(priv, gswip_pce_microcode[i].val_2,
                               GSWIP_PCE_TBL_VAL(2));
                gswip_switch_w(priv, gswip_pce_microcode[i].val_3,
                               GSWIP_PCE_TBL_VAL(3));

                /* start the table access: */
                gswip_switch_mask(priv, 0, GSWIP_PCE_TBL_CTRL_BAS,
                                  GSWIP_PCE_TBL_CTRL);
                err = gswip_switch_r_timeout(priv, GSWIP_PCE_TBL_CTRL,
                                             GSWIP_PCE_TBL_CTRL_BAS);
                if (err)
                        return err;
        }

        /* tell the switch that the microcode is loaded */
        gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_0_MC_VALID,
                          GSWIP_PCE_GCTRL_0);

        return 0;
}

static int gswip_port_vlan_filtering(struct dsa_switch *ds, int port,
                                     bool vlan_filtering,
                                     struct netlink_ext_ack *extack)
{
        struct net_device *bridge = dsa_port_bridge_dev_get(dsa_to_port(ds, port));
        struct gswip_priv *priv = ds->priv;

        /* Do not allow changing the VLAN filtering options while in bridge */
        if (bridge && !!(priv->port_vlan_filter & BIT(port)) != vlan_filtering) {
                NL_SET_ERR_MSG_MOD(extack,
                                   "Dynamic toggling of vlan_filtering not supported");
                return -EIO;
        }

        if (vlan_filtering) {
                /* Use port based VLAN tag */
                gswip_switch_mask(priv,
                                  GSWIP_PCE_VCTRL_VSR,
                                  GSWIP_PCE_VCTRL_UVR | GSWIP_PCE_VCTRL_VIMR |
                                  GSWIP_PCE_VCTRL_VEMR,
                                  GSWIP_PCE_VCTRL(port));
                gswip_switch_mask(priv, GSWIP_PCE_PCTRL_0_TVM, 0,
                                  GSWIP_PCE_PCTRL_0p(port));
        } else {
                /* Use port based VLAN tag */
                gswip_switch_mask(priv,
                                  GSWIP_PCE_VCTRL_UVR | GSWIP_PCE_VCTRL_VIMR |
                                  GSWIP_PCE_VCTRL_VEMR,
                                  GSWIP_PCE_VCTRL_VSR,
                                  GSWIP_PCE_VCTRL(port));
                gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_TVM,
                                  GSWIP_PCE_PCTRL_0p(port));
        }

        return 0;
}

static int gswip_setup(struct dsa_switch *ds)
{
        struct gswip_priv *priv = ds->priv;
        unsigned int cpu_port = priv->hw_info->cpu_port;
        int i;
        int err;

        gswip_switch_w(priv, GSWIP_SWRES_R0, GSWIP_SWRES);
        usleep_range(5000, 10000);
        gswip_switch_w(priv, 0, GSWIP_SWRES);

        /* disable port fetch/store dma on all ports */
        for (i = 0; i < priv->hw_info->max_ports; i++) {
                gswip_port_disable(ds, i);
                gswip_port_vlan_filtering(ds, i, false, NULL);
        }

        /* enable Switch */
        gswip_mdio_mask(priv, 0, GSWIP_MDIO_GLOB_ENABLE, GSWIP_MDIO_GLOB);

        err = gswip_pce_load_microcode(priv);
        if (err) {
                dev_err(priv->dev, "writing PCE microcode failed, %i", err);
                return err;
        }

        /* Default unknown Broadcast/Multicast/Unicast port maps */
        gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP1);
        gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP2);
        gswip_switch_w(priv, BIT(cpu_port), GSWIP_PCE_PMAP3);

        /* Deactivate MDIO PHY auto polling. Some PHYs as the AR8030 have an
         * interoperability problem with this auto polling mechanism because
         * their status registers think that the link is in a different state
         * than it actually is. For the AR8030 it has the BMSR_ESTATEN bit set
         * as well as ESTATUS_1000_TFULL and ESTATUS_1000_XFULL. This makes the
         * auto polling state machine consider the link being negotiated with
         * 1Gbit/s. Since the PHY itself is a Fast Ethernet RMII PHY this leads
         * to the switch port being completely dead (RX and TX are both not
         * working).
         * Also with various other PHY / port combinations (PHY11G GPHY, PHY22F
         * GPHY, external RGMII PEF7071/7072) any traffic would stop. Sometimes
         * it would work fine for a few minutes to hours and then stop, on
         * other device it would no traffic could be sent or received at all.
         * Testing shows that when PHY auto polling is disabled these problems
         * go away.
         */
        gswip_mdio_w(priv, 0x0, GSWIP_MDIO_MDC_CFG0);

        /* Configure the MDIO Clock 2.5 MHz */
        gswip_mdio_mask(priv, 0xff, 0x09, GSWIP_MDIO_MDC_CFG1);

        /* Disable the xMII interface and clear it's isolation bit */
        for (i = 0; i < priv->hw_info->max_ports; i++)
                gswip_mii_mask_cfg(priv,
                                   GSWIP_MII_CFG_EN | GSWIP_MII_CFG_ISOLATE,
                                   0, i);

        /* enable special tag insertion on cpu port */
        gswip_switch_mask(priv, 0, GSWIP_FDMA_PCTRL_STEN,
                          GSWIP_FDMA_PCTRLp(cpu_port));

        /* accept special tag in ingress direction */
        gswip_switch_mask(priv, 0, GSWIP_PCE_PCTRL_0_INGRESS,
                          GSWIP_PCE_PCTRL_0p(cpu_port));

        gswip_switch_mask(priv, 0, GSWIP_BM_QUEUE_GCTRL_GL_MOD,
                          GSWIP_BM_QUEUE_GCTRL);

        /* VLAN aware Switching */
        gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_0_VLAN, GSWIP_PCE_GCTRL_0);

        /* Flush MAC Table */
        gswip_switch_mask(priv, 0, GSWIP_PCE_GCTRL_0_MTFL, GSWIP_PCE_GCTRL_0);

        err = gswip_switch_r_timeout(priv, GSWIP_PCE_GCTRL_0,
                                     GSWIP_PCE_GCTRL_0_MTFL);
        if (err) {
                dev_err(priv->dev, "MAC flushing didn't finish\n");
                return err;
        }

        ds->mtu_enforcement_ingress = true;

        gswip_port_enable(ds, cpu_port, NULL);

        ds->configure_vlan_while_not_filtering = false;

        return 0;
}

static enum dsa_tag_protocol gswip_get_tag_protocol(struct dsa_switch *ds,
                                                    int port,
                                                    enum dsa_tag_protocol mp)
{
        return DSA_TAG_PROTO_GSWIP;
}

static int gswip_vlan_active_create(struct gswip_priv *priv,
                                    struct net_device *bridge,
                                    int fid, u16 vid)
{
        struct gswip_pce_table_entry vlan_active = {0,};
        unsigned int max_ports = priv->hw_info->max_ports;
        int idx = -1;
        int err;
        int i;

        /* Look for a free slot */
        for (i = max_ports; i < ARRAY_SIZE(priv->vlans); i++) {
                if (!priv->vlans[i].bridge) {
                        idx = i;
                        break;
                }
        }

        if (idx == -1)
                return -ENOSPC;

        if (fid == -1)
                fid = idx;

        vlan_active.index = idx;
        vlan_active.table = GSWIP_TABLE_ACTIVE_VLAN;
        vlan_active.key[0] = vid;
        vlan_active.val[0] = fid;
        vlan_active.valid = true;

        err = gswip_pce_table_entry_write(priv, &vlan_active);
        if (err) {
                dev_err(priv->dev, "failed to write active VLAN: %d\n", err);
                return err;
        }

        priv->vlans[idx].bridge = bridge;
        priv->vlans[idx].vid = vid;
        priv->vlans[idx].fid = fid;

        return idx;
}

static int gswip_vlan_active_remove(struct gswip_priv *priv, int idx)
{
        struct gswip_pce_table_entry vlan_active = {0,};
        int err;

        vlan_active.index = idx;
        vlan_active.table = GSWIP_TABLE_ACTIVE_VLAN;
        vlan_active.valid = false;
        err = gswip_pce_table_entry_write(priv, &vlan_active);
        if (err)
                dev_err(priv->dev, "failed to delete active VLAN: %d\n", err);
        priv->vlans[idx].bridge = NULL;

        return err;
}

static int gswip_vlan_add_unaware(struct gswip_priv *priv,
                                  struct net_device *bridge, int port)
{
        struct gswip_pce_table_entry vlan_mapping = {0,};
        unsigned int max_ports = priv->hw_info->max_ports;
        unsigned int cpu_port = priv->hw_info->cpu_port;
        bool active_vlan_created = false;
        int idx = -1;
        int i;
        int err;

        /* Check if there is already a page for this bridge */
        for (i = max_ports; i < ARRAY_SIZE(priv->vlans); i++) {
                if (priv->vlans[i].bridge == bridge) {
                        idx = i;
                        break;
                }
        }

        /* If this bridge is not programmed yet, add a Active VLAN table
         * entry in a free slot and prepare the VLAN mapping table entry.
         */
        if (idx == -1) {
                idx = gswip_vlan_active_create(priv, bridge, -1, 0);
                if (idx < 0)
                        return idx;
                active_vlan_created = true;

                vlan_mapping.index = idx;
                vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
                /* VLAN ID byte, maps to the VLAN ID of vlan active table */
                vlan_mapping.val[0] = 0;
        } else {
                /* Read the existing VLAN mapping entry from the switch */

                vlan_mapping.index = idx;
                vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
                err = gswip_pce_table_entry_read(priv, &vlan_mapping);
                if (err) {
                        dev_err(priv->dev, "failed to read VLAN mapping: %d\n",
                                err);
                        return err;
                }
        }

        /* Update the VLAN mapping entry and write it to the switch */
        vlan_mapping.val[1] |= BIT(cpu_port);
        vlan_mapping.val[1] |= BIT(port);
        err = gswip_pce_table_entry_write(priv, &vlan_mapping);
        if (err) {
                dev_err(priv->dev, "failed to write VLAN mapping: %d\n", err);
                /* In case an Active VLAN was creaetd delete it again */
                if (active_vlan_created)
                        gswip_vlan_active_remove(priv, idx);
                return err;
        }

        gswip_switch_w(priv, 0, GSWIP_PCE_DEFPVID(port));
        return 0;
}

static int gswip_vlan_add_aware(struct gswip_priv *priv,
                                struct net_device *bridge, int port,
                                u16 vid, bool untagged,
                                bool pvid)
{
        struct gswip_pce_table_entry vlan_mapping = {0,};
        unsigned int max_ports = priv->hw_info->max_ports;
        unsigned int cpu_port = priv->hw_info->cpu_port;
        bool active_vlan_created = false;
        int idx = -1;
        int fid = -1;
        int i;
        int err;

        /* Check if there is already a page for this bridge */
        for (i = max_ports; i < ARRAY_SIZE(priv->vlans); i++) {
                if (priv->vlans[i].bridge == bridge) {
                        if (fid != -1 && fid != priv->vlans[i].fid)
                                dev_err(priv->dev, "one bridge with multiple flow ids\n");
                        fid = priv->vlans[i].fid;
                        if (priv->vlans[i].vid == vid) {
                                idx = i;
                                break;
                        }
                }
        }

        /* If this bridge is not programmed yet, add a Active VLAN table
         * entry in a free slot and prepare the VLAN mapping table entry.
         */
        if (idx == -1) {
                idx = gswip_vlan_active_create(priv, bridge, fid, vid);
                if (idx < 0)
                        return idx;
                active_vlan_created = true;

                vlan_mapping.index = idx;
                vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
                /* VLAN ID byte, maps to the VLAN ID of vlan active table */
                vlan_mapping.val[0] = vid;
        } else {
                /* Read the existing VLAN mapping entry from the switch */
                vlan_mapping.index = idx;
                vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
                err = gswip_pce_table_entry_read(priv, &vlan_mapping);
                if (err) {
                        dev_err(priv->dev, "failed to read VLAN mapping: %d\n",
                                err);
                        return err;
                }
        }

        vlan_mapping.val[0] = vid;
        /* Update the VLAN mapping entry and write it to the switch */
        vlan_mapping.val[1] |= BIT(cpu_port);
        vlan_mapping.val[2] |= BIT(cpu_port);
        vlan_mapping.val[1] |= BIT(port);
        if (untagged)
                vlan_mapping.val[2] &= ~BIT(port);
        else
                vlan_mapping.val[2] |= BIT(port);
        err = gswip_pce_table_entry_write(priv, &vlan_mapping);
        if (err) {
                dev_err(priv->dev, "failed to write VLAN mapping: %d\n", err);
                /* In case an Active VLAN was creaetd delete it again */
                if (active_vlan_created)
                        gswip_vlan_active_remove(priv, idx);
                return err;
        }

        if (pvid)
                gswip_switch_w(priv, idx, GSWIP_PCE_DEFPVID(port));

        return 0;
}

static int gswip_vlan_remove(struct gswip_priv *priv,
                             struct net_device *bridge, int port,
                             u16 vid, bool pvid, bool vlan_aware)
{
        struct gswip_pce_table_entry vlan_mapping = {0,};
        unsigned int max_ports = priv->hw_info->max_ports;
        unsigned int cpu_port = priv->hw_info->cpu_port;
        int idx = -1;
        int i;
        int err;

        /* Check if there is already a page for this bridge */
        for (i = max_ports; i < ARRAY_SIZE(priv->vlans); i++) {
                if (priv->vlans[i].bridge == bridge &&
                    (!vlan_aware || priv->vlans[i].vid == vid)) {
                        idx = i;
                        break;
                }
        }

        if (idx == -1) {
                dev_err(priv->dev, "bridge to leave does not exists\n");
                return -ENOENT;
        }

        vlan_mapping.index = idx;
        vlan_mapping.table = GSWIP_TABLE_VLAN_MAPPING;
        err = gswip_pce_table_entry_read(priv, &vlan_mapping);
        if (err) {
                dev_err(priv->dev, "failed to read VLAN mapping: %d\n", err);
                return err;
        }

        vlan_mapping.val[1] &= ~BIT(port);
        vlan_mapping.val[2] &= ~BIT(port);
        err = gswip_pce_table_entry_write(priv, &vlan_mapping);
        if (err) {
                dev_err(priv->dev, "failed to write VLAN mapping: %d\n", err);
                return err;
        }

        /* In case all ports are removed from the bridge, remove the VLAN */
        if ((vlan_mapping.val[1] & ~BIT(cpu_port)) == 0) {
                err = gswip_vlan_active_remove(priv, idx);
                if (err) {
                        dev_err(priv->dev, "failed to write active VLAN: %d\n",
                                err);
                        return err;
                }
        }

        /* GSWIP 2.2 (GRX300) and later program here the VID directly. */
        if (pvid)
                gswip_switch_w(priv, 0, GSWIP_PCE_DEFPVID(port));

        return 0;
}

static int gswip_port_bridge_join(struct dsa_switch *ds, int port,
                                  struct dsa_bridge bridge,
                                  bool *tx_fwd_offload,
                                  struct netlink_ext_ack *extack)
{
        struct net_device *br = bridge.dev;
        struct gswip_priv *priv = ds->priv;
        int err;

        /* When the bridge uses VLAN filtering we have to configure VLAN
         * specific bridges. No bridge is configured here.
         */
        if (!br_vlan_enabled(br)) {
                err = gswip_vlan_add_unaware(priv, br, port);
                if (err)
                        return err;
                priv->port_vlan_filter &= ~BIT(port);
        } else {
                priv->port_vlan_filter |= BIT(port);
        }
        return gswip_add_single_port_br(priv, port, false);
}

static void gswip_port_bridge_leave(struct dsa_switch *ds, int port,
                                    struct dsa_bridge bridge)
{
        struct net_device *br = bridge.dev;
        struct gswip_priv *priv = ds->priv;

        gswip_add_single_port_br(priv, port, true);

        /* When the bridge uses VLAN filtering we have to configure VLAN
         * specific bridges. No bridge is configured here.
         */
        if (!br_vlan_enabled(br))
                gswip_vlan_remove(priv, br, port, 0, true, false);
}

static int gswip_port_vlan_prepare(struct dsa_switch *ds, int port,
                                   const struct switchdev_obj_port_vlan *vlan,
                                   struct netlink_ext_ack *extack)
{
        struct net_device *bridge = dsa_port_bridge_dev_get(dsa_to_port(ds, port));
        struct gswip_priv *priv = ds->priv;
        unsigned int max_ports = priv->hw_info->max_ports;
        int pos = max_ports;
        int i, idx = -1;

        /* We only support VLAN filtering on bridges */
        if (!dsa_is_cpu_port(ds, port) && !bridge)
                return -EOPNOTSUPP;

        /* Check if there is already a page for this VLAN */
        for (i = max_ports; i < ARRAY_SIZE(priv->vlans); i++) {
                if (priv->vlans[i].bridge == bridge &&
                    priv->vlans[i].vid == vlan->vid) {
                        idx = i;
                        break;
                }
        }

        /* If this VLAN is not programmed yet, we have to reserve
         * one entry in the VLAN table. Make sure we start at the
         * next position round.
         */
        if (idx == -1) {
                /* Look for a free slot */
                for (; pos < ARRAY_SIZE(priv->vlans); pos++) {
                        if (!priv->vlans[pos].bridge) {
                                idx = pos;
                                pos++;
                                break;
                        }
                }

                if (idx == -1) {
                        NL_SET_ERR_MSG_MOD(extack, "No slot in VLAN table");
                        return -ENOSPC;
                }
        }

        return 0;
}

static int gswip_port_vlan_add(struct dsa_switch *ds, int port,
                               const struct switchdev_obj_port_vlan *vlan,
                               struct netlink_ext_ack *extack)
{
        struct net_device *bridge = dsa_port_bridge_dev_get(dsa_to_port(ds, port));
        struct gswip_priv *priv = ds->priv;
        bool untagged = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED;
        bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;
        int err;

        err = gswip_port_vlan_prepare(ds, port, vlan, extack);
        if (err)
                return err;

        /* We have to receive all packets on the CPU port and should not
         * do any VLAN filtering here. This is also called with bridge
         * NULL and then we do not know for which bridge to configure
         * this.
         */
        if (dsa_is_cpu_port(ds, port))
                return 0;

        return gswip_vlan_add_aware(priv, bridge, port, vlan->vid,
                                    untagged, pvid);
}

static int gswip_port_vlan_del(struct dsa_switch *ds, int port,
                               const struct switchdev_obj_port_vlan *vlan)
{
        struct net_device *bridge = dsa_port_bridge_dev_get(dsa_to_port(ds, port));
        struct gswip_priv *priv = ds->priv;
        bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID;

        /* We have to receive all packets on the CPU port and should not
         * do any VLAN filtering here. This is also called with bridge
         * NULL and then we do not know for which bridge to configure
         * this.
         */
        if (dsa_is_cpu_port(ds, port))
                return 0;

        return gswip_vlan_remove(priv, bridge, port, vlan->vid, pvid, true);
}

static void gswip_port_fast_age(struct dsa_switch *ds, int port)
{
        struct gswip_priv *priv = ds->priv;
        struct gswip_pce_table_entry mac_bridge = {0,};
        int i;
        int err;

        for (i = 0; i < 2048; i++) {
                mac_bridge.table = GSWIP_TABLE_MAC_BRIDGE;
                mac_bridge.index = i;

                err = gswip_pce_table_entry_read(priv, &mac_bridge);
                if (err) {
                        dev_err(priv->dev, "failed to read mac bridge: %d\n",
                                err);
                        return;
                }

                if (!mac_bridge.valid)
                        continue;

                if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_STATIC)
                        continue;

                if (((mac_bridge.val[0] & GENMASK(7, 4)) >> 4) != port)
                        continue;

                mac_bridge.valid = false;
                err = gswip_pce_table_entry_write(priv, &mac_bridge);
                if (err) {
                        dev_err(priv->dev, "failed to write mac bridge: %d\n",
                                err);
                        return;
                }
        }
}

static void gswip_port_stp_state_set(struct dsa_switch *ds, int port, u8 state)
{
        struct gswip_priv *priv = ds->priv;
        u32 stp_state;

        switch (state) {
        case BR_STATE_DISABLED:
                gswip_switch_mask(priv, GSWIP_SDMA_PCTRL_EN, 0,
                                  GSWIP_SDMA_PCTRLp(port));
                return;
        case BR_STATE_BLOCKING:
        case BR_STATE_LISTENING:
                stp_state = GSWIP_PCE_PCTRL_0_PSTATE_LISTEN;
                break;
        case BR_STATE_LEARNING:
                stp_state = GSWIP_PCE_PCTRL_0_PSTATE_LEARNING;
                break;
        case BR_STATE_FORWARDING:
                stp_state = GSWIP_PCE_PCTRL_0_PSTATE_FORWARDING;
                break;
        default:
                dev_err(priv->dev, "invalid STP state: %d\n", state);
                return;
        }

        gswip_switch_mask(priv, 0, GSWIP_SDMA_PCTRL_EN,
                          GSWIP_SDMA_PCTRLp(port));
        gswip_switch_mask(priv, GSWIP_PCE_PCTRL_0_PSTATE_MASK, stp_state,
                          GSWIP_PCE_PCTRL_0p(port));
}

static int gswip_port_fdb(struct dsa_switch *ds, int port,
                          const unsigned char *addr, u16 vid, bool add)
{
        struct net_device *bridge = dsa_port_bridge_dev_get(dsa_to_port(ds, port));
        struct gswip_priv *priv = ds->priv;
        struct gswip_pce_table_entry mac_bridge = {0,};
        unsigned int cpu_port = priv->hw_info->cpu_port;
        int fid = -1;
        int i;
        int err;

        if (!bridge)
                return -EINVAL;

        for (i = cpu_port; i < ARRAY_SIZE(priv->vlans); i++) {
                if (priv->vlans[i].bridge == bridge) {
                        fid = priv->vlans[i].fid;
                        break;
                }
        }

        if (fid == -1) {
                dev_err(priv->dev, "Port not part of a bridge\n");
                return -EINVAL;
        }

        mac_bridge.table = GSWIP_TABLE_MAC_BRIDGE;
        mac_bridge.key_mode = true;
        mac_bridge.key[0] = addr[5] | (addr[4] << 8);
        mac_bridge.key[1] = addr[3] | (addr[2] << 8);
        mac_bridge.key[2] = addr[1] | (addr[0] << 8);
        mac_bridge.key[3] = fid;
        mac_bridge.val[0] = add ? BIT(port) : 0; /* port map */
        mac_bridge.val[1] = GSWIP_TABLE_MAC_BRIDGE_STATIC;
        mac_bridge.valid = add;

        err = gswip_pce_table_entry_write(priv, &mac_bridge);
        if (err)
                dev_err(priv->dev, "failed to write mac bridge: %d\n", err);

        return err;
}

static int gswip_port_fdb_add(struct dsa_switch *ds, int port,
                              const unsigned char *addr, u16 vid,
                              struct dsa_db db)
{
        return gswip_port_fdb(ds, port, addr, vid, true);
}

static int gswip_port_fdb_del(struct dsa_switch *ds, int port,
                              const unsigned char *addr, u16 vid,
                              struct dsa_db db)
{
        return gswip_port_fdb(ds, port, addr, vid, false);
}

static int gswip_port_fdb_dump(struct dsa_switch *ds, int port,
                               dsa_fdb_dump_cb_t *cb, void *data)
{
        struct gswip_priv *priv = ds->priv;
        struct gswip_pce_table_entry mac_bridge = {0,};
        unsigned char addr[6];
        int i;
        int err;

        for (i = 0; i < 2048; i++) {
                mac_bridge.table = GSWIP_TABLE_MAC_BRIDGE;
                mac_bridge.index = i;

                err = gswip_pce_table_entry_read(priv, &mac_bridge);
                if (err) {
                        dev_err(priv->dev, "failed to write mac bridge: %d\n",
                                err);
                        return err;
                }

                if (!mac_bridge.valid)
                        continue;

                addr[5] = mac_bridge.key[0] & 0xff;
                addr[4] = (mac_bridge.key[0] >> 8) & 0xff;
                addr[3] = mac_bridge.key[1] & 0xff;
                addr[2] = (mac_bridge.key[1] >> 8) & 0xff;
                addr[1] = mac_bridge.key[2] & 0xff;
                addr[0] = (mac_bridge.key[2] >> 8) & 0xff;
                if (mac_bridge.val[1] & GSWIP_TABLE_MAC_BRIDGE_STATIC) {
                        if (mac_bridge.val[0] & BIT(port)) {
                                err = cb(addr, 0, true, data);
                                if (err)
                                        return err;
                        }
                } else {
                        if (((mac_bridge.val[0] & GENMASK(7, 4)) >> 4) == port) {
                                err = cb(addr, 0, false, data);
                                if (err)
                                        return err;
                        }
                }
        }
        return 0;
}

static int gswip_port_max_mtu(struct dsa_switch *ds, int port)
{
        /* Includes 8 bytes for special header. */
        return GSWIP_MAX_PACKET_LENGTH - VLAN_ETH_HLEN - ETH_FCS_LEN;
}

static int gswip_port_change_mtu(struct dsa_switch *ds, int port, int new_mtu)
{
        struct gswip_priv *priv = ds->priv;
        int cpu_port = priv->hw_info->cpu_port;

        /* CPU port always has maximum mtu of user ports, so use it to set
         * switch frame size, including 8 byte special header.
         */
        if (port == cpu_port) {
                new_mtu += 8;
                gswip_switch_w(priv, VLAN_ETH_HLEN + new_mtu + ETH_FCS_LEN,
                               GSWIP_MAC_FLEN);
        }

        /* Enable MLEN for ports with non-standard MTUs, including the special
         * header on the CPU port added above.
         */
        if (new_mtu != ETH_DATA_LEN)
                gswip_switch_mask(priv, 0, GSWIP_MAC_CTRL_2_MLEN,
                                  GSWIP_MAC_CTRL_2p(port));
        else
                gswip_switch_mask(priv, GSWIP_MAC_CTRL_2_MLEN, 0,
                                  GSWIP_MAC_CTRL_2p(port));

        return 0;
}

static void gswip_xrx200_phylink_get_caps(struct dsa_switch *ds, int port,
                                          struct phylink_config *config)
{
        switch (port) {
        case 0:
        case 1:
                phy_interface_set_rgmii(config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_MII,
                          config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_REVMII,
                          config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_RMII,
                          config->supported_interfaces);
                break;

        case 2:
        case 3:
        case 4:
                __set_bit(PHY_INTERFACE_MODE_INTERNAL,
                          config->supported_interfaces);
                break;

        case 5:
                phy_interface_set_rgmii(config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_INTERNAL,
                          config->supported_interfaces);
                break;
        }

        config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
                MAC_10 | MAC_100 | MAC_1000;
}

static void gswip_xrx300_phylink_get_caps(struct dsa_switch *ds, int port,
                                          struct phylink_config *config)
{
        switch (port) {
        case 0:
                phy_interface_set_rgmii(config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_GMII,
                          config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_RMII,
                          config->supported_interfaces);
                break;

        case 1:
        case 2:
        case 3:
        case 4:
                __set_bit(PHY_INTERFACE_MODE_INTERNAL,
                          config->supported_interfaces);
                break;

        case 5:
                phy_interface_set_rgmii(config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_INTERNAL,
                          config->supported_interfaces);
                __set_bit(PHY_INTERFACE_MODE_RMII,
                          config->supported_interfaces);
                break;
        }

        config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
                MAC_10 | MAC_100 | MAC_1000;
}

static void gswip_port_set_link(struct gswip_priv *priv, int port, bool link)
{
        u32 mdio_phy;

        if (link)
                mdio_phy = GSWIP_MDIO_PHY_LINK_UP;
        else
                mdio_phy = GSWIP_MDIO_PHY_LINK_DOWN;

        gswip_mdio_mask(priv, GSWIP_MDIO_PHY_LINK_MASK, mdio_phy,
                        GSWIP_MDIO_PHYp(port));
}

static void gswip_port_set_speed(struct gswip_priv *priv, int port, int speed,
                                 phy_interface_t interface)
{
        u32 mdio_phy = 0, mii_cfg = 0, mac_ctrl_0 = 0;

        switch (speed) {
        case SPEED_10:
                mdio_phy = GSWIP_MDIO_PHY_SPEED_M10;

                if (interface == PHY_INTERFACE_MODE_RMII)
                        mii_cfg = GSWIP_MII_CFG_RATE_M50;
                else
                        mii_cfg = GSWIP_MII_CFG_RATE_M2P5;

                mac_ctrl_0 = GSWIP_MAC_CTRL_0_GMII_MII;
                break;

        case SPEED_100:
                mdio_phy = GSWIP_MDIO_PHY_SPEED_M100;

                if (interface == PHY_INTERFACE_MODE_RMII)
                        mii_cfg = GSWIP_MII_CFG_RATE_M50;
                else
                        mii_cfg = GSWIP_MII_CFG_RATE_M25;

                mac_ctrl_0 = GSWIP_MAC_CTRL_0_GMII_MII;
                break;

        case SPEED_1000:
                mdio_phy = GSWIP_MDIO_PHY_SPEED_G1;

                mii_cfg = GSWIP_MII_CFG_RATE_M125;

                mac_ctrl_0 = GSWIP_MAC_CTRL_0_GMII_RGMII;
                break;
        }

        gswip_mdio_mask(priv, GSWIP_MDIO_PHY_SPEED_MASK, mdio_phy,
                        GSWIP_MDIO_PHYp(port));
        gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_RATE_MASK, mii_cfg, port);
        gswip_switch_mask(priv, GSWIP_MAC_CTRL_0_GMII_MASK, mac_ctrl_0,
                          GSWIP_MAC_CTRL_0p(port));
}

static void gswip_port_set_duplex(struct gswip_priv *priv, int port, int duplex)
{
        u32 mac_ctrl_0, mdio_phy;

        if (duplex == DUPLEX_FULL) {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FDUP_EN;
                mdio_phy = GSWIP_MDIO_PHY_FDUP_EN;
        } else {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FDUP_DIS;
                mdio_phy = GSWIP_MDIO_PHY_FDUP_DIS;
        }

        gswip_switch_mask(priv, GSWIP_MAC_CTRL_0_FDUP_MASK, mac_ctrl_0,
                          GSWIP_MAC_CTRL_0p(port));
        gswip_mdio_mask(priv, GSWIP_MDIO_PHY_FDUP_MASK, mdio_phy,
                        GSWIP_MDIO_PHYp(port));
}

static void gswip_port_set_pause(struct gswip_priv *priv, int port,
                                 bool tx_pause, bool rx_pause)
{
        u32 mac_ctrl_0, mdio_phy;

        if (tx_pause && rx_pause) {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FCON_RXTX;
                mdio_phy = GSWIP_MDIO_PHY_FCONTX_EN |
                           GSWIP_MDIO_PHY_FCONRX_EN;
        } else if (tx_pause) {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FCON_TX;
                mdio_phy = GSWIP_MDIO_PHY_FCONTX_EN |
                           GSWIP_MDIO_PHY_FCONRX_DIS;
        } else if (rx_pause) {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FCON_RX;
                mdio_phy = GSWIP_MDIO_PHY_FCONTX_DIS |
                           GSWIP_MDIO_PHY_FCONRX_EN;
        } else {
                mac_ctrl_0 = GSWIP_MAC_CTRL_0_FCON_NONE;
                mdio_phy = GSWIP_MDIO_PHY_FCONTX_DIS |
                           GSWIP_MDIO_PHY_FCONRX_DIS;
        }

        gswip_switch_mask(priv, GSWIP_MAC_CTRL_0_FCON_MASK,
                          mac_ctrl_0, GSWIP_MAC_CTRL_0p(port));
        gswip_mdio_mask(priv,
                        GSWIP_MDIO_PHY_FCONTX_MASK |
                        GSWIP_MDIO_PHY_FCONRX_MASK,
                        mdio_phy, GSWIP_MDIO_PHYp(port));
}

static void gswip_phylink_mac_config(struct dsa_switch *ds, int port,
                                     unsigned int mode,
                                     const struct phylink_link_state *state)
{
        struct gswip_priv *priv = ds->priv;
        u32 miicfg = 0;

        miicfg |= GSWIP_MII_CFG_LDCLKDIS;

        switch (state->interface) {
        case PHY_INTERFACE_MODE_MII:
        case PHY_INTERFACE_MODE_INTERNAL:
                miicfg |= GSWIP_MII_CFG_MODE_MIIM;
                break;
        case PHY_INTERFACE_MODE_REVMII:
                miicfg |= GSWIP_MII_CFG_MODE_MIIP;
                break;
        case PHY_INTERFACE_MODE_RMII:
                miicfg |= GSWIP_MII_CFG_MODE_RMIIM;
                break;
        case PHY_INTERFACE_MODE_RGMII:
        case PHY_INTERFACE_MODE_RGMII_ID:
        case PHY_INTERFACE_MODE_RGMII_RXID:
        case PHY_INTERFACE_MODE_RGMII_TXID:
                miicfg |= GSWIP_MII_CFG_MODE_RGMII;
                break;
        case PHY_INTERFACE_MODE_GMII:
                miicfg |= GSWIP_MII_CFG_MODE_GMII;
                break;
        default:
                dev_err(ds->dev,
                        "Unsupported interface: %d\n", state->interface);
                return;
        }

        gswip_mii_mask_cfg(priv,
                           GSWIP_MII_CFG_MODE_MASK | GSWIP_MII_CFG_RMII_CLK |
                           GSWIP_MII_CFG_RGMII_IBS | GSWIP_MII_CFG_LDCLKDIS,
                           miicfg, port);

        switch (state->interface) {
        case PHY_INTERFACE_MODE_RGMII_ID:
                gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_TXDLY_MASK |
                                          GSWIP_MII_PCDU_RXDLY_MASK, 0, port);
                break;
        case PHY_INTERFACE_MODE_RGMII_RXID:
                gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_RXDLY_MASK, 0, port);
                break;
        case PHY_INTERFACE_MODE_RGMII_TXID:
                gswip_mii_mask_pcdu(priv, GSWIP_MII_PCDU_TXDLY_MASK, 0, port);
                break;
        default:
                break;
        }
}

static void gswip_phylink_mac_link_down(struct dsa_switch *ds, int port,
                                        unsigned int mode,
                                        phy_interface_t interface)
{
        struct gswip_priv *priv = ds->priv;

        gswip_mii_mask_cfg(priv, GSWIP_MII_CFG_EN, 0, port);

        if (!dsa_is_cpu_port(ds, port))
                gswip_port_set_link(priv, port, false);
}

static void gswip_phylink_mac_link_up(struct dsa_switch *ds, int port,
                                      unsigned int mode,
                                      phy_interface_t interface,
                                      struct phy_device *phydev,
                                      int speed, int duplex,
                                      bool tx_pause, bool rx_pause)
{
        struct gswip_priv *priv = ds->priv;

        if (!dsa_is_cpu_port(ds, port)) {
                gswip_port_set_link(priv, port, true);
                gswip_port_set_speed(priv, port, speed, interface);
                gswip_port_set_duplex(priv, port, duplex);
                gswip_port_set_pause(priv, port, tx_pause, rx_pause);
        }

        gswip_mii_mask_cfg(priv, 0, GSWIP_MII_CFG_EN, port);
}

static void gswip_get_strings(struct dsa_switch *ds, int port, u32 stringset,
                              uint8_t *data)
{
        int i;

        if (stringset != ETH_SS_STATS)
                return;

        for (i = 0; i < ARRAY_SIZE(gswip_rmon_cnt); i++)
                strncpy(data + i * ETH_GSTRING_LEN, gswip_rmon_cnt[i].name,
                        ETH_GSTRING_LEN);
}

static u32 gswip_bcm_ram_entry_read(struct gswip_priv *priv, u32 table,
                                    u32 index)
{
        u32 result;
        int err;

        gswip_switch_w(priv, index, GSWIP_BM_RAM_ADDR);
        gswip_switch_mask(priv, GSWIP_BM_RAM_CTRL_ADDR_MASK |
                                GSWIP_BM_RAM_CTRL_OPMOD,
                              table | GSWIP_BM_RAM_CTRL_BAS,
                              GSWIP_BM_RAM_CTRL);

        err = gswip_switch_r_timeout(priv, GSWIP_BM_RAM_CTRL,
                                     GSWIP_BM_RAM_CTRL_BAS);
        if (err) {
                dev_err(priv->dev, "timeout while reading table: %u, index: %u",
                        table, index);
                return 0;
        }

        result = gswip_switch_r(priv, GSWIP_BM_RAM_VAL(0));
        result |= gswip_switch_r(priv, GSWIP_BM_RAM_VAL(1)) << 16;

        return result;
}

static void gswip_get_ethtool_stats(struct dsa_switch *ds, int port,
                                    uint64_t *data)
{
        struct gswip_priv *priv = ds->priv;
        const struct gswip_rmon_cnt_desc *rmon_cnt;
        int i;
        u64 high;

        for (i = 0; i < ARRAY_SIZE(gswip_rmon_cnt); i++) {
                rmon_cnt = &gswip_rmon_cnt[i];

                data[i] = gswip_bcm_ram_entry_read(priv, port,
                                                   rmon_cnt->offset);
                if (rmon_cnt->size == 2) {
                        high = gswip_bcm_ram_entry_read(priv, port,
                                                        rmon_cnt->offset + 1);
                        data[i] |= high << 32;
                }
        }
}

static int gswip_get_sset_count(struct dsa_switch *ds, int port, int sset)
{
        if (sset != ETH_SS_STATS)
                return 0;

        return ARRAY_SIZE(gswip_rmon_cnt);
}

static const struct dsa_switch_ops gswip_xrx200_switch_ops = {
        .get_tag_protocol       = gswip_get_tag_protocol,
        .setup                  = gswip_setup,
        .port_enable            = gswip_port_enable,
        .port_disable           = gswip_port_disable,
        .port_bridge_join       = gswip_port_bridge_join,
        .port_bridge_leave      = gswip_port_bridge_leave,
        .port_fast_age          = gswip_port_fast_age,
        .port_vlan_filtering    = gswip_port_vlan_filtering,
        .port_vlan_add          = gswip_port_vlan_add,
        .port_vlan_del          = gswip_port_vlan_del,
        .port_stp_state_set     = gswip_port_stp_state_set,
        .port_fdb_add           = gswip_port_fdb_add,
        .port_fdb_del           = gswip_port_fdb_del,
        .port_fdb_dump          = gswip_port_fdb_dump,
        .port_change_mtu        = gswip_port_change_mtu,
        .port_max_mtu           = gswip_port_max_mtu,
        .phylink_get_caps       = gswip_xrx200_phylink_get_caps,
        .phylink_mac_config     = gswip_phylink_mac_config,
        .phylink_mac_link_down  = gswip_phylink_mac_link_down,
        .phylink_mac_link_up    = gswip_phylink_mac_link_up,
        .get_strings            = gswip_get_strings,
        .get_ethtool_stats      = gswip_get_ethtool_stats,
        .get_sset_count         = gswip_get_sset_count,
};

static const struct dsa_switch_ops gswip_xrx300_switch_ops = {
        .get_tag_protocol       = gswip_get_tag_protocol,
        .setup                  = gswip_setup,
        .port_enable            = gswip_port_enable,
        .port_disable           = gswip_port_disable,
        .port_bridge_join       = gswip_port_bridge_join,
        .port_bridge_leave      = gswip_port_bridge_leave,
        .port_fast_age          = gswip_port_fast_age,
        .port_vlan_filtering    = gswip_port_vlan_filtering,
        .port_vlan_add          = gswip_port_vlan_add,
        .port_vlan_del          = gswip_port_vlan_del,
        .port_stp_state_set     = gswip_port_stp_state_set,
        .port_fdb_add           = gswip_port_fdb_add,
        .port_fdb_del           = gswip_port_fdb_del,
        .port_fdb_dump          = gswip_port_fdb_dump,
        .port_change_mtu        = gswip_port_change_mtu,
        .port_max_mtu           = gswip_port_max_mtu,
        .phylink_get_caps       = gswip_xrx300_phylink_get_caps,
        .phylink_mac_config     = gswip_phylink_mac_config,
        .phylink_mac_link_down  = gswip_phylink_mac_link_down,
        .phylink_mac_link_up    = gswip_phylink_mac_link_up,
        .get_strings            = gswip_get_strings,
        .get_ethtool_stats      = gswip_get_ethtool_stats,
        .get_sset_count         = gswip_get_sset_count,
};

static const struct xway_gphy_match_data xrx200a1x_gphy_data = {
        .fe_firmware_name = "lantiq/xrx200_phy22f_a14.bin",
        .ge_firmware_name = "lantiq/xrx200_phy11g_a14.bin",
};

static const struct xway_gphy_match_data xrx200a2x_gphy_data = {
        .fe_firmware_name = "lantiq/xrx200_phy22f_a22.bin",
        .ge_firmware_name = "lantiq/xrx200_phy11g_a22.bin",
};

static const struct xway_gphy_match_data xrx300_gphy_data = {
        .fe_firmware_name = "lantiq/xrx300_phy22f_a21.bin",
        .ge_firmware_name = "lantiq/xrx300_phy11g_a21.bin",
};

static const struct of_device_id xway_gphy_match[] = {
        { .compatible = "lantiq,xrx200-gphy-fw", .data = NULL },
        { .compatible = "lantiq,xrx200a1x-gphy-fw", .data = &xrx200a1x_gphy_data },
        { .compatible = "lantiq,xrx200a2x-gphy-fw", .data = &xrx200a2x_gphy_data },
        { .compatible = "lantiq,xrx300-gphy-fw", .data = &xrx300_gphy_data },
        { .compatible = "lantiq,xrx330-gphy-fw", .data = &xrx300_gphy_data },
        {},
};

static int gswip_gphy_fw_load(struct gswip_priv *priv, struct gswip_gphy_fw *gphy_fw)
{
        struct device *dev = priv->dev;
        const struct firmware *fw;
        void *fw_addr;
        dma_addr_t dma_addr;
        dma_addr_t dev_addr;
        size_t size;
        int ret;

        ret = clk_prepare_enable(gphy_fw->clk_gate);
        if (ret)
                return ret;

        reset_control_assert(gphy_fw->reset);

        /* The vendor BSP uses a 200ms delay after asserting the reset line.
         * Without this some users are observing that the PHY is not coming up
         * on the MDIO bus.
         */
        msleep(200);

        ret = request_firmware(&fw, gphy_fw->fw_name, dev);
        if (ret) {
                dev_err(dev, "failed to load firmware: %s, error: %i\n",
                        gphy_fw->fw_name, ret);
                return ret;
        }

        /* GPHY cores need the firmware code in a persistent and contiguous
         * memory area with a 16 kB boundary aligned start address.
         */
        size = fw->size + XRX200_GPHY_FW_ALIGN;

        fw_addr = dmam_alloc_coherent(dev, size, &dma_addr, GFP_KERNEL);
        if (fw_addr) {
                fw_addr = PTR_ALIGN(fw_addr, XRX200_GPHY_FW_ALIGN);
                dev_addr = ALIGN(dma_addr, XRX200_GPHY_FW_ALIGN);
                memcpy(fw_addr, fw->data, fw->size);
        } else {
                dev_err(dev, "failed to alloc firmware memory\n");
                release_firmware(fw);
                return -ENOMEM;
        }

        release_firmware(fw);

        ret = regmap_write(priv->rcu_regmap, gphy_fw->fw_addr_offset, dev_addr);
        if (ret)
                return ret;

        reset_control_deassert(gphy_fw->reset);

        return ret;
}

static int gswip_gphy_fw_probe(struct gswip_priv *priv,
                               struct gswip_gphy_fw *gphy_fw,
                               struct device_node *gphy_fw_np, int i)
{
        struct device *dev = priv->dev;
        u32 gphy_mode;
        int ret;
        char gphyname[10];

        snprintf(gphyname, sizeof(gphyname), "gphy%d", i);

        gphy_fw->clk_gate = devm_clk_get(dev, gphyname);
        if (IS_ERR(gphy_fw->clk_gate)) {
                dev_err(dev, "Failed to lookup gate clock\n");
                return PTR_ERR(gphy_fw->clk_gate);
        }

        ret = of_property_read_u32(gphy_fw_np, "reg", &gphy_fw->fw_addr_offset);
        if (ret)
                return ret;

        ret = of_property_read_u32(gphy_fw_np, "lantiq,gphy-mode", &gphy_mode);
        /* Default to GE mode */
        if (ret)
                gphy_mode = GPHY_MODE_GE;

        switch (gphy_mode) {
        case GPHY_MODE_FE:
                gphy_fw->fw_name = priv->gphy_fw_name_cfg->fe_firmware_name;
                break;
        case GPHY_MODE_GE:
                gphy_fw->fw_name = priv->gphy_fw_name_cfg->ge_firmware_name;
                break;
        default:
                dev_err(dev, "Unknown GPHY mode %d\n", gphy_mode);
                return -EINVAL;
        }

        gphy_fw->reset = of_reset_control_array_get_exclusive(gphy_fw_np);
        if (IS_ERR(gphy_fw->reset)) {
                if (PTR_ERR(gphy_fw->reset) != -EPROBE_DEFER)
                        dev_err(dev, "Failed to lookup gphy reset\n");
                return PTR_ERR(gphy_fw->reset);
        }

        return gswip_gphy_fw_load(priv, gphy_fw);
}

static void gswip_gphy_fw_remove(struct gswip_priv *priv,

                                 struct gswip_gphy_fw *gphy_fw)
{
        int ret;

        /* check if the device was fully probed */
        if (!gphy_fw->fw_name)
                return;

        ret = regmap_write(priv->rcu_regmap, gphy_fw->fw_addr_offset, 0);
        if (ret)
                dev_err(priv->dev, "can not reset GPHY FW pointer");

        clk_disable_unprepare(gphy_fw->clk_gate);

        reset_control_put(gphy_fw->reset);
}

static int gswip_gphy_fw_list(struct gswip_priv *priv,
                              struct device_node *gphy_fw_list_np, u32 version)
{
        struct device *dev = priv->dev;
        struct device_node *gphy_fw_np;
        const struct of_device_id *match;
        int err;
        int i = 0;

        /* The VRX200 rev 1.1 uses the GSWIP 2.0 and needs the older
         * GPHY firmware. The VRX200 rev 1.2 uses the GSWIP 2.1 and also
         * needs a different GPHY firmware.
         */
        if (of_device_is_compatible(gphy_fw_list_np, "lantiq,xrx200-gphy-fw")) {
                switch (version) {
                case GSWIP_VERSION_2_0:
                        priv->gphy_fw_name_cfg = &xrx200a1x_gphy_data;
                        break;
                case GSWIP_VERSION_2_1:
                        priv->gphy_fw_name_cfg = &xrx200a2x_gphy_data;
                        break;
                default:
                        dev_err(dev, "unknown GSWIP version: 0x%x", version);
                        return -ENOENT;
                }
        }

        match = of_match_node(xway_gphy_match, gphy_fw_list_np);
        if (match && match->data)
                priv->gphy_fw_name_cfg = match->data;

        if (!priv->gphy_fw_name_cfg) {
                dev_err(dev, "GPHY compatible type not supported");
                return -ENOENT;
        }

        priv->num_gphy_fw = of_get_available_child_count(gphy_fw_list_np);
        if (!priv->num_gphy_fw)
                return -ENOENT;

        priv->rcu_regmap = syscon_regmap_lookup_by_phandle(gphy_fw_list_np,
                                                           "lantiq,rcu");
        if (IS_ERR(priv->rcu_regmap))
                return PTR_ERR(priv->rcu_regmap);

        priv->gphy_fw = devm_kmalloc_array(dev, priv->num_gphy_fw,
                                           sizeof(*priv->gphy_fw),
                                           GFP_KERNEL | __GFP_ZERO);
        if (!priv->gphy_fw)
                return -ENOMEM;

        for_each_available_child_of_node(gphy_fw_list_np, gphy_fw_np) {
                err = gswip_gphy_fw_probe(priv, &priv->gphy_fw[i],
                                          gphy_fw_np, i);
                if (err)
                        goto remove_gphy;
                i++;
        }

        /* The standalone PHY11G requires 300ms to be fully
         * initialized and ready for any MDIO communication after being
         * taken out of reset. For the SoC-internal GPHY variant there
         * is no (known) documentation for the minimum time after a
         * reset. Use the same value as for the standalone variant as
         * some users have reported internal PHYs not being detected
         * without any delay.
         */
        msleep(300);

        return 0;

remove_gphy:
        for (i = 0; i < priv->num_gphy_fw; i++)
                gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);
        return err;
}

static int gswip_probe(struct platform_device *pdev)
{
        struct gswip_priv *priv;
        struct device_node *np, *mdio_np, *gphy_fw_np;
        struct device *dev = &pdev->dev;
        int err;
        int i;
        u32 version;

        priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
        if (!priv)
                return -ENOMEM;

        priv->gswip = devm_platform_ioremap_resource(pdev, 0);
        if (IS_ERR(priv->gswip))
                return PTR_ERR(priv->gswip);

        priv->mdio = devm_platform_ioremap_resource(pdev, 1);
        if (IS_ERR(priv->mdio))
                return PTR_ERR(priv->mdio);

        priv->mii = devm_platform_ioremap_resource(pdev, 2);
        if (IS_ERR(priv->mii))
                return PTR_ERR(priv->mii);

        priv->hw_info = of_device_get_match_data(dev);
        if (!priv->hw_info)
                return -EINVAL;

        priv->ds = devm_kzalloc(dev, sizeof(*priv->ds), GFP_KERNEL);
        if (!priv->ds)
                return -ENOMEM;

        priv->ds->dev = dev;
        priv->ds->num_ports = priv->hw_info->max_ports;
        priv->ds->priv = priv;
        priv->ds->ops = priv->hw_info->ops;
        priv->dev = dev;
        mutex_init(&priv->pce_table_lock);
        version = gswip_switch_r(priv, GSWIP_VERSION);

        np = dev->of_node;
        switch (version) {
        case GSWIP_VERSION_2_0:
        case GSWIP_VERSION_2_1:
                if (!of_device_is_compatible(np, "lantiq,xrx200-gswip"))
                        return -EINVAL;
                break;
        case GSWIP_VERSION_2_2:
        case GSWIP_VERSION_2_2_ETC:
                if (!of_device_is_compatible(np, "lantiq,xrx300-gswip") &&
                    !of_device_is_compatible(np, "lantiq,xrx330-gswip"))
                        return -EINVAL;
                break;
        default:
                dev_err(dev, "unknown GSWIP version: 0x%x", version);
                return -ENOENT;
        }

        /* bring up the mdio bus */
        gphy_fw_np = of_get_compatible_child(dev->of_node, "lantiq,gphy-fw");
        if (gphy_fw_np) {
                err = gswip_gphy_fw_list(priv, gphy_fw_np, version);
                of_node_put(gphy_fw_np);
                if (err) {
                        dev_err(dev, "gphy fw probe failed\n");
                        return err;
                }
        }

        /* bring up the mdio bus */
        mdio_np = of_get_compatible_child(dev->of_node, "lantiq,xrx200-mdio");
        if (mdio_np) {
                err = gswip_mdio(priv, mdio_np);
                if (err) {
                        dev_err(dev, "mdio probe failed\n");
                        goto put_mdio_node;
                }
        }

        err = dsa_register_switch(priv->ds);
        if (err) {
                dev_err(dev, "dsa switch register failed: %i\n", err);
                goto mdio_bus;
        }
        if (!dsa_is_cpu_port(priv->ds, priv->hw_info->cpu_port)) {
                dev_err(dev, "wrong CPU port defined, HW only supports port: %i",
                        priv->hw_info->cpu_port);
                err = -EINVAL;
                goto disable_switch;
        }

        platform_set_drvdata(pdev, priv);

        dev_info(dev, "probed GSWIP version %lx mod %lx\n",
                 (version & GSWIP_VERSION_REV_MASK) >> GSWIP_VERSION_REV_SHIFT,
                 (version & GSWIP_VERSION_MOD_MASK) >> GSWIP_VERSION_MOD_SHIFT);
        return 0;

disable_switch:
        gswip_mdio_mask(priv, GSWIP_MDIO_GLOB_ENABLE, 0, GSWIP_MDIO_GLOB);
        dsa_unregister_switch(priv->ds);
mdio_bus:
        if (mdio_np) {
                mdiobus_unregister(priv->ds->slave_mii_bus);
                mdiobus_free(priv->ds->slave_mii_bus);
        }
put_mdio_node:
        of_node_put(mdio_np);
        for (i = 0; i < priv->num_gphy_fw; i++)
                gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);
        return err;
}

static int gswip_remove(struct platform_device *pdev)
{
        struct gswip_priv *priv = platform_get_drvdata(pdev);
        int i;

        if (!priv)
                return 0;

        /* disable the switch */
        gswip_mdio_mask(priv, GSWIP_MDIO_GLOB_ENABLE, 0, GSWIP_MDIO_GLOB);

        dsa_unregister_switch(priv->ds);

        if (priv->ds->slave_mii_bus) {
                mdiobus_unregister(priv->ds->slave_mii_bus);
                of_node_put(priv->ds->slave_mii_bus->dev.of_node);
                mdiobus_free(priv->ds->slave_mii_bus);
        }

        for (i = 0; i < priv->num_gphy_fw; i++)
                gswip_gphy_fw_remove(priv, &priv->gphy_fw[i]);

        platform_set_drvdata(pdev, NULL);

        return 0;
}

static void gswip_shutdown(struct platform_device *pdev)
{
        struct gswip_priv *priv = platform_get_drvdata(pdev);

        if (!priv)
                return;

        dsa_switch_shutdown(priv->ds);

        platform_set_drvdata(pdev, NULL);
}

static const struct gswip_hw_info gswip_xrx200 = {
        .max_ports = 7,
        .cpu_port = 6,
        .ops = &gswip_xrx200_switch_ops,
};

static const struct gswip_hw_info gswip_xrx300 = {
        .max_ports = 7,
        .cpu_port = 6,
        .ops = &gswip_xrx300_switch_ops,
};

static const struct of_device_id gswip_of_match[] = {
        { .compatible = "lantiq,xrx200-gswip", .data = &gswip_xrx200 },
        { .compatible = "lantiq,xrx300-gswip", .data = &gswip_xrx300 },
        { .compatible = "lantiq,xrx330-gswip", .data = &gswip_xrx300 },
        {},
};
MODULE_DEVICE_TABLE(of, gswip_of_match);

static struct platform_driver gswip_driver = {
        .probe = gswip_probe,
        .remove = gswip_remove,
        .shutdown = gswip_shutdown,
        .driver = {
                .name = "gswip",
                .of_match_table = gswip_of_match,
        },
};

module_platform_driver(gswip_driver);

MODULE_FIRMWARE("lantiq/xrx300_phy11g_a21.bin");
MODULE_FIRMWARE("lantiq/xrx300_phy22f_a21.bin");
MODULE_FIRMWARE("lantiq/xrx200_phy11g_a14.bin");
MODULE_FIRMWARE("lantiq/xrx200_phy11g_a22.bin");
MODULE_FIRMWARE("lantiq/xrx200_phy22f_a14.bin");
MODULE_FIRMWARE("lantiq/xrx200_phy22f_a22.bin");
MODULE_AUTHOR("Hauke Mehrtens <hauke@hauke-m.de>");
MODULE_DESCRIPTION("Lantiq / Intel GSWIP driver");
MODULE_LICENSE("GPL v2");