/*
 * Freescale Three Speed Ethernet Controller driver
 *
 * Copyright 2004-2011, 2013 Freescale Semiconductor, Inc.
 * (C) Copyright 2003, Motorola, Inc.
 * author Andy Fleming
 *
 * SPDX-License-Identifier:     GPL-2.0+
 */

#include <config.h>
#include <common.h>
#include <dm.h>
#include <malloc.h>
#include <net.h>
#include <command.h>
#include <tsec.h>
#include <fsl_mdio.h>
#include <asm/errno.h>
#include <asm/processor.h>
#include <asm/io.h>

DECLARE_GLOBAL_DATA_PTR;

#ifndef CONFIG_DM_ETH
/* Default initializations for TSEC controllers. */

static struct tsec_info_struct tsec_info[] = {
#ifdef CONFIG_TSEC1
        STD_TSEC_INFO(1),       /* TSEC1 */
#endif
#ifdef CONFIG_TSEC2
        STD_TSEC_INFO(2),       /* TSEC2 */
#endif
#ifdef CONFIG_MPC85XX_FEC
        {
                .regs = TSEC_GET_REGS(2, 0x2000),
                .devname = CONFIG_MPC85XX_FEC_NAME,
                .phyaddr = FEC_PHY_ADDR,
                .flags = FEC_FLAGS,
                .mii_devname = DEFAULT_MII_NAME
        },                      /* FEC */
#endif
#ifdef CONFIG_TSEC3
        STD_TSEC_INFO(3),       /* TSEC3 */
#endif
#ifdef CONFIG_TSEC4
        STD_TSEC_INFO(4),       /* TSEC4 */
#endif
};
#endif /* CONFIG_DM_ETH */

#define TBIANA_SETTINGS ( \
                TBIANA_ASYMMETRIC_PAUSE \
                | TBIANA_SYMMETRIC_PAUSE \
                | TBIANA_FULL_DUPLEX \
                )

/* By default force the TBI PHY into 1000Mbps full duplex when in SGMII mode */
#ifndef CONFIG_TSEC_TBICR_SETTINGS
#define CONFIG_TSEC_TBICR_SETTINGS ( \
                TBICR_PHY_RESET \
                | TBICR_ANEG_ENABLE \
                | TBICR_FULL_DUPLEX \
                | TBICR_SPEED1_SET \
                )
#endif /* CONFIG_TSEC_TBICR_SETTINGS */

/* Configure the TBI for SGMII operation */
static void tsec_configure_serdes(struct tsec_private *priv)
{
        /*
         * Access TBI PHY registers at given TSEC register offset as opposed
         * to the register offset used for external PHY accesses
         */
        tsec_local_mdio_write(priv->phyregs_sgmii, in_be32(&priv->regs->tbipa),
                        0, TBI_ANA, TBIANA_SETTINGS);
        tsec_local_mdio_write(priv->phyregs_sgmii, in_be32(&priv->regs->tbipa),
                        0, TBI_TBICON, TBICON_CLK_SELECT);
        tsec_local_mdio_write(priv->phyregs_sgmii, in_be32(&priv->regs->tbipa),
                        0, TBI_CR, CONFIG_TSEC_TBICR_SETTINGS);
}

#ifdef CONFIG_MCAST_TFTP

/* CREDITS: linux gianfar driver, slightly adjusted... thanx. */

/* Set the appropriate hash bit for the given addr */

/*
 * The algorithm works like so:
 * 1) Take the Destination Address (ie the multicast address), and
 * do a CRC on it (little endian), and reverse the bits of the
 * result.
 * 2) Use the 8 most significant bits as a hash into a 256-entry
 * table.  The table is controlled through 8 32-bit registers:
 * gaddr0-7.  gaddr0's MSB is entry 0, and gaddr7's LSB is entry
 * 255.  This means that the 3 most significant bits in the
 * hash index which gaddr register to use, and the 5 other bits
 * indicate which bit (assuming an IBM numbering scheme, which
 * for PowerPC (tm) is usually the case) in the register holds
 * the entry.
 */
#ifndef CONFIG_DM_ETH
static int tsec_mcast_addr(struct eth_device *dev, const u8 *mcast_mac, u8 set)
#else
static int tsec_mcast_addr(struct udevice *dev, const u8 *mcast_mac, int set)
#endif
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        struct tsec __iomem *regs = priv->regs;
        u32 result, value;
        u8 whichbit, whichreg;

        result = ether_crc(MAC_ADDR_LEN, mcast_mac);
        whichbit = (result >> 24) & 0x1f; /* the 5 LSB = which bit to set */
        whichreg = result >> 29; /* the 3 MSB = which reg to set it in */

        value = 1 << (31-whichbit);

        if (set)
                setbits_be32(&regs->hash.gaddr0 + whichreg, value);
        else
                clrbits_be32(&regs->hash.gaddr0 + whichreg, value);

        return 0;
}
#endif /* Multicast TFTP ? */

/*
 * Initialized required registers to appropriate values, zeroing
 * those we don't care about (unless zero is bad, in which case,
 * choose a more appropriate value)
 */
static void init_registers(struct tsec __iomem *regs)
{
        /* Clear IEVENT */
        out_be32(&regs->ievent, IEVENT_INIT_CLEAR);

        out_be32(&regs->imask, IMASK_INIT_CLEAR);

        out_be32(&regs->hash.iaddr0, 0);
        out_be32(&regs->hash.iaddr1, 0);
        out_be32(&regs->hash.iaddr2, 0);
        out_be32(&regs->hash.iaddr3, 0);
        out_be32(&regs->hash.iaddr4, 0);
        out_be32(&regs->hash.iaddr5, 0);
        out_be32(&regs->hash.iaddr6, 0);
        out_be32(&regs->hash.iaddr7, 0);

        out_be32(&regs->hash.gaddr0, 0);
        out_be32(&regs->hash.gaddr1, 0);
        out_be32(&regs->hash.gaddr2, 0);
        out_be32(&regs->hash.gaddr3, 0);
        out_be32(&regs->hash.gaddr4, 0);
        out_be32(&regs->hash.gaddr5, 0);
        out_be32(&regs->hash.gaddr6, 0);
        out_be32(&regs->hash.gaddr7, 0);

        out_be32(&regs->rctrl, 0x00000000);

        /* Init RMON mib registers */
        memset((void *)&regs->rmon, 0, sizeof(regs->rmon));

        out_be32(&regs->rmon.cam1, 0xffffffff);
        out_be32(&regs->rmon.cam2, 0xffffffff);

        out_be32(&regs->mrblr, MRBLR_INIT_SETTINGS);

        out_be32(&regs->minflr, MINFLR_INIT_SETTINGS);

        out_be32(&regs->attr, ATTR_INIT_SETTINGS);
        out_be32(&regs->attreli, ATTRELI_INIT_SETTINGS);

}

/*
 * Configure maccfg2 based on negotiated speed and duplex
 * reported by PHY handling code
 */
static void adjust_link(struct tsec_private *priv, struct phy_device *phydev)
{
        struct tsec __iomem *regs = priv->regs;
        u32 ecntrl, maccfg2;

        if (!phydev->link) {
                printf("%s: No link.\n", phydev->dev->name);
                return;
        }

        /* clear all bits relative with interface mode */
        ecntrl = in_be32(&regs->ecntrl);
        ecntrl &= ~ECNTRL_R100;

        maccfg2 = in_be32(&regs->maccfg2);
        maccfg2 &= ~(MACCFG2_IF | MACCFG2_FULL_DUPLEX);

        if (phydev->duplex)
                maccfg2 |= MACCFG2_FULL_DUPLEX;

        switch (phydev->speed) {
        case 1000:
                maccfg2 |= MACCFG2_GMII;
                break;
        case 100:
        case 10:
                maccfg2 |= MACCFG2_MII;

                /*
                 * Set R100 bit in all modes although
                 * it is only used in RGMII mode
                 */
                if (phydev->speed == 100)
                        ecntrl |= ECNTRL_R100;
                break;
        default:
                printf("%s: Speed was bad\n", phydev->dev->name);
                break;
        }

        out_be32(&regs->ecntrl, ecntrl);
        out_be32(&regs->maccfg2, maccfg2);

        printf("Speed: %d, %s duplex%s\n", phydev->speed,
                        (phydev->duplex) ? "full" : "half",
                        (phydev->port == PORT_FIBRE) ? ", fiber mode" : "");
}

/*
 * This returns the status bits of the device. The return value
 * is never checked, and this is what the 8260 driver did, so we
 * do the same. Presumably, this would be zero if there were no
 * errors
 */
#ifndef CONFIG_DM_ETH
static int tsec_send(struct eth_device *dev, void *packet, int length)
#else
static int tsec_send(struct udevice *dev, void *packet, int length)
#endif
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        struct tsec __iomem *regs = priv->regs;
        uint16_t status;
        int result = 0;
        int i;

        /* Find an empty buffer descriptor */
        for (i = 0;
             in_be16(&priv->txbd[priv->tx_idx].status) & TXBD_READY;
             i++) {
                if (i >= TOUT_LOOP) {
                        debug("%s: tsec: tx buffers full\n", dev->name);
                        return result;
                }
        }

        out_be32(&priv->txbd[priv->tx_idx].bufptr, (u32)packet);
        out_be16(&priv->txbd[priv->tx_idx].length, length);
        status = in_be16(&priv->txbd[priv->tx_idx].status);
        out_be16(&priv->txbd[priv->tx_idx].status, status |
                (TXBD_READY | TXBD_LAST | TXBD_CRC | TXBD_INTERRUPT));

        /* Tell the DMA to go */
        out_be32(&regs->tstat, TSTAT_CLEAR_THALT);

        /* Wait for buffer to be transmitted */
        for (i = 0;
             in_be16(&priv->txbd[priv->tx_idx].status) & TXBD_READY;
             i++) {
                if (i >= TOUT_LOOP) {
                        debug("%s: tsec: tx error\n", dev->name);
                        return result;
                }
        }

        priv->tx_idx = (priv->tx_idx + 1) % TX_BUF_CNT;
        result = in_be16(&priv->txbd[priv->tx_idx].status) & TXBD_STATS;

        return result;
}

#ifndef CONFIG_DM_ETH
static int tsec_recv(struct eth_device *dev)
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        struct tsec __iomem *regs = priv->regs;

        while (!(in_be16(&priv->rxbd[priv->rx_idx].status) & RXBD_EMPTY)) {
                int length = in_be16(&priv->rxbd[priv->rx_idx].length);
                uint16_t status = in_be16(&priv->rxbd[priv->rx_idx].status);
                uchar *packet = net_rx_packets[priv->rx_idx];

                /* Send the packet up if there were no errors */
                if (!(status & RXBD_STATS))
                        net_process_received_packet(packet, length - 4);
                else
                        printf("Got error %x\n", (status & RXBD_STATS));

                out_be16(&priv->rxbd[priv->rx_idx].length, 0);

                status = RXBD_EMPTY;
                /* Set the wrap bit if this is the last element in the list */
                if ((priv->rx_idx + 1) == PKTBUFSRX)
                        status |= RXBD_WRAP;
                out_be16(&priv->rxbd[priv->rx_idx].status, status);

                priv->rx_idx = (priv->rx_idx + 1) % PKTBUFSRX;
        }

        if (in_be32(&regs->ievent) & IEVENT_BSY) {
                out_be32(&regs->ievent, IEVENT_BSY);
                out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
        }

        return -1;
}
#else
static int tsec_recv(struct udevice *dev, int flags, uchar **packetp)
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        struct tsec __iomem *regs = priv->regs;
        int ret = -1;

        if (!(in_be16(&priv->rxbd[priv->rx_idx].status) & RXBD_EMPTY)) {
                int length = in_be16(&priv->rxbd[priv->rx_idx].length);
                uint16_t status = in_be16(&priv->rxbd[priv->rx_idx].status);
                uint32_t buf;

                /* Send the packet up if there were no errors */
                if (!(status & RXBD_STATS)) {
                        buf = in_be32(&priv->rxbd[priv->rx_idx].bufptr);
                        *packetp = (uchar *)buf;
                        ret = length - 4;
                } else {
                        printf("Got error %x\n", (status & RXBD_STATS));
                }
        }

        if (in_be32(&regs->ievent) & IEVENT_BSY) {
                out_be32(&regs->ievent, IEVENT_BSY);
                out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
        }

        return ret;
}

static int tsec_free_pkt(struct udevice *dev, uchar *packet, int length)
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        uint16_t status;

        out_be16(&priv->rxbd[priv->rx_idx].length, 0);

        status = RXBD_EMPTY;
        /* Set the wrap bit if this is the last element in the list */
        if ((priv->rx_idx + 1) == PKTBUFSRX)
                status |= RXBD_WRAP;
        out_be16(&priv->rxbd[priv->rx_idx].status, status);

        priv->rx_idx = (priv->rx_idx + 1) % PKTBUFSRX;

        return 0;
}
#endif

/* Stop the interface */
#ifndef CONFIG_DM_ETH
static void tsec_halt(struct eth_device *dev)
#else
static void tsec_halt(struct udevice *dev)
#endif
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
        struct tsec __iomem *regs = priv->regs;

        clrbits_be32(&regs->dmactrl, DMACTRL_GRS | DMACTRL_GTS);
        setbits_be32(&regs->dmactrl, DMACTRL_GRS | DMACTRL_GTS);

        while ((in_be32(&regs->ievent) & (IEVENT_GRSC | IEVENT_GTSC))
                        != (IEVENT_GRSC | IEVENT_GTSC))
                ;

        clrbits_be32(&regs->maccfg1, MACCFG1_TX_EN | MACCFG1_RX_EN);

        /* Shut down the PHY, as needed */
        phy_shutdown(priv->phydev);
}

#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
/*
 * When MACCFG1[Rx_EN] is enabled during system boot as part
 * of the eTSEC port initialization sequence,
 * the eTSEC Rx logic may not be properly initialized.
 */
void redundant_init(struct tsec_private *priv)
{
        struct tsec __iomem *regs = priv->regs;
        uint t, count = 0;
        int fail = 1;
        static const u8 pkt[] = {
                0x00, 0x1e, 0x4f, 0x12, 0xcb, 0x2c, 0x00, 0x25,
                0x64, 0xbb, 0xd1, 0xab, 0x08, 0x00, 0x45, 0x00,
                0x00, 0x5c, 0xdd, 0x22, 0x00, 0x00, 0x80, 0x01,
                0x1f, 0x71, 0x0a, 0xc1, 0x14, 0x22, 0x0a, 0xc1,
                0x14, 0x6a, 0x08, 0x00, 0xef, 0x7e, 0x02, 0x00,
                0x94, 0x05, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66,
                0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e,
                0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76,
                0x77, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
                0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
                0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
                0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68,
                0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70,
                0x71, 0x72};

        /* Enable promiscuous mode */
        setbits_be32(&regs->rctrl, 0x8);
        /* Enable loopback mode */
        setbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
        /* Enable transmit and receive */
        setbits_be32(&regs->maccfg1, MACCFG1_RX_EN | MACCFG1_TX_EN);

        /* Tell the DMA it is clear to go */
        setbits_be32(&regs->dmactrl, DMACTRL_INIT_SETTINGS);
        out_be32(&regs->tstat, TSTAT_CLEAR_THALT);
        out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
        clrbits_be32(&regs->dmactrl, DMACTRL_GRS | DMACTRL_GTS);

        do {
                uint16_t status;
                tsec_send(priv->dev, (void *)pkt, sizeof(pkt));

                /* Wait for buffer to be received */
                for (t = 0;
                     in_be16(&priv->rxbd[priv->rx_idx].status) & RXBD_EMPTY;
                     t++) {
                        if (t >= 10 * TOUT_LOOP) {
                                printf("%s: tsec: rx error\n", priv->dev->name);
                                break;
                        }
                }

                if (!memcmp(pkt, net_rx_packets[priv->rx_idx], sizeof(pkt)))
                        fail = 0;

                out_be16(&priv->rxbd[priv->rx_idx].length, 0);
                status = RXBD_EMPTY;
                if ((priv->rx_idx + 1) == PKTBUFSRX)
                        status |= RXBD_WRAP;
                out_be16(&priv->rxbd[priv->rx_idx].status, status);
                priv->rx_idx = (priv->rx_idx + 1) % PKTBUFSRX;

                if (in_be32(&regs->ievent) & IEVENT_BSY) {
                        out_be32(&regs->ievent, IEVENT_BSY);
                        out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
                }
                if (fail) {
                        printf("loopback recv packet error!\n");
                        clrbits_be32(&regs->maccfg1, MACCFG1_RX_EN);
                        udelay(1000);
                        setbits_be32(&regs->maccfg1, MACCFG1_RX_EN);
                }
        } while ((count++ < 4) && (fail == 1));

        if (fail)
                panic("eTSEC init fail!\n");
        /* Disable promiscuous mode */
        clrbits_be32(&regs->rctrl, 0x8);
        /* Disable loopback mode */
        clrbits_be32(&regs->maccfg1, MACCFG1_LOOPBACK);
}
#endif

/*
 * Set up the buffers and their descriptors, and bring up the
 * interface
 */
static void startup_tsec(struct tsec_private *priv)
{
        struct tsec __iomem *regs = priv->regs;
        uint16_t status;
        int i;

        /* reset the indices to zero */
        priv->rx_idx = 0;
        priv->tx_idx = 0;
#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
        uint svr;
#endif

        /* Point to the buffer descriptors */
        out_be32(&regs->tbase, (u32)&priv->txbd[0]);
        out_be32(&regs->rbase, (u32)&priv->rxbd[0]);

        /* Initialize the Rx Buffer descriptors */
        for (i = 0; i < PKTBUFSRX; i++) {
                out_be16(&priv->rxbd[i].status, RXBD_EMPTY);
                out_be16(&priv->rxbd[i].length, 0);
                out_be32(&priv->rxbd[i].bufptr, (u32)net_rx_packets[i]);
        }
        status = in_be16(&priv->rxbd[PKTBUFSRX - 1].status);
        out_be16(&priv->rxbd[PKTBUFSRX - 1].status, status | RXBD_WRAP);

        /* Initialize the TX Buffer Descriptors */
        for (i = 0; i < TX_BUF_CNT; i++) {
                out_be16(&priv->txbd[i].status, 0);
                out_be16(&priv->txbd[i].length, 0);
                out_be32(&priv->txbd[i].bufptr, 0);
        }
        status = in_be16(&priv->txbd[TX_BUF_CNT - 1].status);
        out_be16(&priv->txbd[TX_BUF_CNT - 1].status, status | TXBD_WRAP);

#ifdef CONFIG_SYS_FSL_ERRATUM_NMG_ETSEC129
        svr = get_svr();
        if ((SVR_MAJ(svr) == 1) || IS_SVR_REV(svr, 2, 0))
                redundant_init(priv);
#endif
        /* Enable Transmit and Receive */
        setbits_be32(&regs->maccfg1, MACCFG1_RX_EN | MACCFG1_TX_EN);

        /* Tell the DMA it is clear to go */
        setbits_be32(&regs->dmactrl, DMACTRL_INIT_SETTINGS);
        out_be32(&regs->tstat, TSTAT_CLEAR_THALT);
        out_be32(&regs->rstat, RSTAT_CLEAR_RHALT);
        clrbits_be32(&regs->dmactrl, DMACTRL_GRS | DMACTRL_GTS);
}

/*
 * Initializes data structures and registers for the controller,
 * and brings the interface up. Returns the link status, meaning
 * that it returns success if the link is up, failure otherwise.
 * This allows U-Boot to find the first active controller.
 */
#ifndef CONFIG_DM_ETH
static int tsec_init(struct eth_device *dev, bd_t * bd)
#else
static int tsec_init(struct udevice *dev)
#endif
{
        struct tsec_private *priv = (struct tsec_private *)dev->priv;
#ifdef CONFIG_DM_ETH
        struct eth_pdata *pdata = dev_get_platdata(dev);
#endif
        struct tsec __iomem *regs = priv->regs;
        u32 tempval;
        int ret;

        /* Make sure the controller is stopped */
        tsec_halt(dev);

        /* Init MACCFG2.  Defaults to GMII */
        out_be32(&regs->maccfg2, MACCFG2_INIT_SETTINGS);

        /* Init ECNTRL */
        out_be32(&regs->ecntrl, ECNTRL_INIT_SETTINGS);

        /*
         * Copy the station address into the address registers.
         * For a station address of 0x12345678ABCD in transmission
         * order (BE), MACnADDR1 is set to 0xCDAB7856 and
         * MACnADDR2 is set to 0x34120000.
         */
#ifndef CONFIG_DM_ETH
        tempval = (dev->enetaddr[5] << 24) | (dev->enetaddr[4] << 16) |
                  (dev->enetaddr[3] << 8)  |  dev->enetaddr[2];
#else
        tempval = (pdata->enetaddr[5] << 24) | (pdata->enetaddr[4] << 16) |
                  (pdata->enetaddr[3] << 8)  |  pdata->enetaddr[2];
#endif

        out_be32(&regs->macstnaddr1, tempval);

#ifndef CONFIG_DM_ETH
        tempval = (dev->enetaddr[1] << 24) | (dev->enetaddr[0] << 16);
#else
        tempval = (pdata->enetaddr[1] << 24) | (pdata->enetaddr[0] << 16);
#endif

        out_be32(&regs->macstnaddr2, tempval);

        /* Clear out (for the most part) the other registers */
        init_registers(regs);

        /* Ready the device for tx/rx */
        startup_tsec(priv);

        /* Start up the PHY */
        ret = phy_startup(priv->phydev);
        if (ret) {
                printf("Could not initialize PHY %s\n",
                       priv->phydev->dev->name);
                return ret;
        }

        adjust_link(priv, priv->phydev);

        /* If there's no link, fail */
        return priv->phydev->link ? 0 : -1;
}

static phy_interface_t tsec_get_interface(struct tsec_private *priv)
{
        struct tsec __iomem *regs = priv->regs;
        u32 ecntrl;

        ecntrl = in_be32(&regs->ecntrl);

        if (ecntrl & ECNTRL_SGMII_MODE)
                return PHY_INTERFACE_MODE_SGMII;

        if (ecntrl & ECNTRL_TBI_MODE) {
                if (ecntrl & ECNTRL_REDUCED_MODE)
                        return PHY_INTERFACE_MODE_RTBI;
                else
                        return PHY_INTERFACE_MODE_TBI;
        }

        if (ecntrl & ECNTRL_REDUCED_MODE) {
                if (ecntrl & ECNTRL_REDUCED_MII_MODE)
                        return PHY_INTERFACE_MODE_RMII;
                else {
                        phy_interface_t interface = priv->interface;

                        /*
                         * This isn't autodetected, so it must
                         * be set by the platform code.
                         */
                        if ((interface == PHY_INTERFACE_MODE_RGMII_ID) ||
                            (interface == PHY_INTERFACE_MODE_RGMII_TXID) ||
                            (interface == PHY_INTERFACE_MODE_RGMII_RXID))
                                return interface;

                        return PHY_INTERFACE_MODE_RGMII;
                }
        }

        if (priv->flags & TSEC_GIGABIT)
                return PHY_INTERFACE_MODE_GMII;

        return PHY_INTERFACE_MODE_MII;
}

/*
 * Discover which PHY is attached to the device, and configure it
 * properly.  If the PHY is not recognized, then return 0
 * (failure).  Otherwise, return 1
 */
static int init_phy(struct tsec_private *priv)
{
        struct phy_device *phydev;
        struct tsec __iomem *regs = priv->regs;
        u32 supported = (SUPPORTED_10baseT_Half |
                        SUPPORTED_10baseT_Full |
                        SUPPORTED_100baseT_Half |
                        SUPPORTED_100baseT_Full);

        if (priv->flags & TSEC_GIGABIT)
                supported |= SUPPORTED_1000baseT_Full;

        /* Assign a Physical address to the TBI */
        out_be32(&regs->tbipa, priv->tbiaddr);

        priv->interface = tsec_get_interface(priv);

        if (priv->interface == PHY_INTERFACE_MODE_SGMII)
                tsec_configure_serdes(priv);

        phydev = phy_connect(priv->bus, priv->phyaddr, priv->dev,
                             priv->interface);
        if (!phydev)
                return 0;

        phydev->supported &= supported;
        phydev->advertising = phydev->supported;

        priv->phydev = phydev;

        phy_config(phydev);

        return 1;
}

#ifndef CONFIG_DM_ETH
/*
 * Initialize device structure. Returns success if PHY
 * initialization succeeded (i.e. if it recognizes the PHY)
 */
static int tsec_initialize(bd_t *bis, struct tsec_info_struct *tsec_info)
{
        struct eth_device *dev;
        int i;
        struct tsec_private *priv;

        dev = (struct eth_device *)malloc(sizeof *dev);

        if (NULL == dev)
                return 0;

        memset(dev, 0, sizeof *dev);

        priv = (struct tsec_private *)malloc(sizeof(*priv));

        if (NULL == priv)
                return 0;

        priv->regs = tsec_info->regs;
        priv->phyregs_sgmii = tsec_info->miiregs_sgmii;

        priv->phyaddr = tsec_info->phyaddr;
        priv->tbiaddr = CONFIG_SYS_TBIPA_VALUE;
        priv->flags = tsec_info->flags;

        strcpy(dev->name, tsec_info->devname);
        priv->interface = tsec_info->interface;
        priv->bus = miiphy_get_dev_by_name(tsec_info->mii_devname);
        priv->dev = dev;
        dev->iobase = 0;
        dev->priv = priv;
        dev->init = tsec_init;
        dev->halt = tsec_halt;
        dev->send = tsec_send;
        dev->recv = tsec_recv;
#ifdef CONFIG_MCAST_TFTP
        dev->mcast = tsec_mcast_addr;
#endif

        /* Tell U-Boot to get the addr from the env */
        for (i = 0; i < 6; i++)
                dev->enetaddr[i] = 0;

        eth_register(dev);

        /* Reset the MAC */
        setbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
        udelay(2);  /* Soft Reset must be asserted for 3 TX clocks */
        clrbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);

        /* Try to initialize PHY here, and return */
        return init_phy(priv);
}

/*
 * Initialize all the TSEC devices
 *
 * Returns the number of TSEC devices that were initialized
 */
int tsec_eth_init(bd_t *bis, struct tsec_info_struct *tsecs, int num)
{
        int i;
        int ret, count = 0;

        for (i = 0; i < num; i++) {
                ret = tsec_initialize(bis, &tsecs[i]);
                if (ret > 0)
                        count += ret;
        }

        return count;
}

int tsec_standard_init(bd_t *bis)
{
        struct fsl_pq_mdio_info info;

        info.regs = TSEC_GET_MDIO_REGS_BASE(1);
        info.name = DEFAULT_MII_NAME;

        fsl_pq_mdio_init(bis, &info);

        return tsec_eth_init(bis, tsec_info, ARRAY_SIZE(tsec_info));
}
#else /* CONFIG_DM_ETH */
int tsec_probe(struct udevice *dev)
{
        struct tsec_private *priv = dev_get_priv(dev);
        struct eth_pdata *pdata = dev_get_platdata(dev);
        struct fsl_pq_mdio_info mdio_info;
        int offset = 0;
        int reg;
        const char *phy_mode;
        int ret;

        pdata->iobase = (phys_addr_t)dev_get_addr(dev);
        priv->regs = (struct tsec *)pdata->iobase;

        offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset,
                                       "phy-handle");
        if (offset > 0) {
                reg = fdtdec_get_int(gd->fdt_blob, offset, "reg", 0);
                priv->phyaddr = reg;
        } else {
                debug("phy-handle does not exist under tsec %s\n", dev->name);
                return -ENOENT;
        }

        offset = fdt_parent_offset(gd->fdt_blob, offset);
        if (offset > 0) {
                reg = fdtdec_get_int(gd->fdt_blob, offset, "reg", 0);
                priv->phyregs_sgmii = (struct tsec_mii_mng *)(reg + 0x520);
        } else {
                debug("No parent node for PHY?\n");
                return -ENOENT;
        }

        offset = fdtdec_lookup_phandle(gd->fdt_blob, dev->of_offset,
                                       "tbi-handle");
        if (offset > 0) {
                reg = fdtdec_get_int(gd->fdt_blob, offset, "reg",
                                     CONFIG_SYS_TBIPA_VALUE);
                priv->tbiaddr = reg;
        } else {
                priv->tbiaddr = CONFIG_SYS_TBIPA_VALUE;
        }

        phy_mode = fdt_getprop(gd->fdt_blob, dev->of_offset,
                               "phy-connection-type", NULL);
        if (phy_mode)
                pdata->phy_interface = phy_get_interface_by_name(phy_mode);
        if (pdata->phy_interface == -1) {
                debug("Invalid PHY interface '%s'\n", phy_mode);
                return -EINVAL;
        }
        priv->interface = pdata->phy_interface;

        /* Initialize flags */
        priv->flags = TSEC_GIGABIT;
        if (priv->interface == PHY_INTERFACE_MODE_SGMII)
                priv->flags |= TSEC_SGMII;

        mdio_info.regs = priv->phyregs_sgmii;
        mdio_info.name = (char *)dev->name;
        ret = fsl_pq_mdio_init(NULL, &mdio_info);
        if (ret)
                return ret;

        /* Reset the MAC */
        setbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
        udelay(2);  /* Soft Reset must be asserted for 3 TX clocks */
        clrbits_be32(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);

        priv->dev = dev;
        priv->bus = miiphy_get_dev_by_name(dev->name);

        /* Try to initialize PHY here, and return */
        return !init_phy(priv);
}

int tsec_remove(struct udevice *dev)
{
        struct tsec_private *priv = dev->priv;

        free(priv->phydev);
        mdio_unregister(priv->bus);
        mdio_free(priv->bus);

        return 0;
}

static const struct eth_ops tsec_ops = {
        .start = tsec_init,
        .send = tsec_send,
        .recv = tsec_recv,
        .free_pkt = tsec_free_pkt,
        .stop = tsec_halt,
#ifdef CONFIG_MCAST_TFTP
        .mcast = tsec_mcast_addr,
#endif
};

static const struct udevice_id tsec_ids[] = {
        { .compatible = "fsl,tsec" },
        { }
};

U_BOOT_DRIVER(eth_tsec) = {
        .name = "tsec",
        .id = UCLASS_ETH,
        .of_match = tsec_ids,
        .probe = tsec_probe,
        .remove = tsec_remove,
        .ops = &tsec_ops,
        .priv_auto_alloc_size = sizeof(struct tsec_private),
        .platdata_auto_alloc_size = sizeof(struct eth_pdata),
        .flags = DM_FLAG_ALLOC_PRIV_DMA,
};
#endif /* CONFIG_DM_ETH */