net: altera_tse: Zap unused variable

[people/ms/u-boot.git] / drivers / net / altera_tse.c

/*
 * Altera 10/100/1000 triple speed ethernet mac driver
 *
 * Copyright (C) 2008 Altera Corporation.
 * Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <config.h>
#include <common.h>
#include <malloc.h>
#include <net.h>
#include <command.h>
#include <asm/cache.h>
#include <asm/dma-mapping.h>
#include <miiphy.h>
#include "altera_tse.h"

/* sgdma debug - print descriptor */
static void alt_sgdma_print_desc(volatile struct alt_sgdma_descriptor *desc)
{
        debug("SGDMA DEBUG :\n");
        debug("desc->source : 0x%x \n", (unsigned int)desc->source);
        debug("desc->destination : 0x%x \n", (unsigned int)desc->destination);
        debug("desc->next : 0x%x \n", (unsigned int)desc->next);
        debug("desc->source_pad : 0x%x \n", (unsigned int)desc->source_pad);
        debug("desc->destination_pad : 0x%x \n",
              (unsigned int)desc->destination_pad);
        debug("desc->next_pad : 0x%x \n", (unsigned int)desc->next_pad);
        debug("desc->bytes_to_transfer : 0x%x \n",
              (unsigned int)desc->bytes_to_transfer);
        debug("desc->actual_bytes_transferred : 0x%x \n",
              (unsigned int)desc->actual_bytes_transferred);
        debug("desc->descriptor_status : 0x%x \n",
              (unsigned int)desc->descriptor_status);
        debug("desc->descriptor_control : 0x%x \n",
              (unsigned int)desc->descriptor_control);
}

/* This is a generic routine that the SGDMA mode-specific routines
 * call to populate a descriptor.
 * arg1     :pointer to first SGDMA descriptor.
 * arg2     :pointer to next  SGDMA descriptor.
 * arg3     :Address to where data to be written.
 * arg4     :Address from where data to be read.
 * arg5     :no of byte to transaction.
 * arg6     :variable indicating to generate start of packet or not
 * arg7     :read fixed
 * arg8     :write fixed
 * arg9     :read burst
 * arg10    :write burst
 * arg11    :atlantic_channel number
 */
static void alt_sgdma_construct_descriptor_burst(
        volatile struct alt_sgdma_descriptor *desc,
        volatile struct alt_sgdma_descriptor *next,
        unsigned int *read_addr,
        unsigned int *write_addr,
        unsigned short length_or_eop,
        int generate_eop,
        int read_fixed,
        int write_fixed_or_sop,
        int read_burst,
        int write_burst,
        unsigned char atlantic_channel)
{
        /*
         * Mark the "next" descriptor as "not" owned by hardware. This prevents
         * The SGDMA controller from continuing to process the chain. This is
         * done as a single IO write to bypass cache, without flushing
         * the entire descriptor, since only the 8-bit descriptor status must
         * be flushed.
         */
        if (!next)
                debug("Next descriptor not defined!!\n");

        next->descriptor_control = (next->descriptor_control &
                ~ALT_SGDMA_DESCRIPTOR_CONTROL_OWNED_BY_HW_MSK);

        desc->source = (unsigned int *)((unsigned int)read_addr & 0x1FFFFFFF);
        desc->destination =
            (unsigned int *)((unsigned int)write_addr & 0x1FFFFFFF);
        desc->next = (unsigned int *)((unsigned int)next & 0x1FFFFFFF);
        desc->source_pad = 0x0;
        desc->destination_pad = 0x0;
        desc->next_pad = 0x0;
        desc->bytes_to_transfer = length_or_eop;
        desc->actual_bytes_transferred = 0;
        desc->descriptor_status = 0x0;

        /* SGDMA burst not currently supported */
        desc->read_burst = 0;
        desc->write_burst = 0;

        /*
         * Set the descriptor control block as follows:
         * - Set "owned by hardware" bit
         * - Optionally set "generate EOP" bit
         * - Optionally set the "read from fixed address" bit
         * - Optionally set the "write to fixed address bit (which serves
         *   serves as a "generate SOP" control bit in memory-to-stream mode).
         * - Set the 4-bit atlantic channel, if specified
         *
         * Note this step is performed after all other descriptor information
         * has been filled out so that, if the controller already happens to be
         * pointing at this descriptor, it will not run (via the "owned by
         * hardware" bit) until all other descriptor has been set up.
         */

        desc->descriptor_control =
            ((ALT_SGDMA_DESCRIPTOR_CONTROL_OWNED_BY_HW_MSK) |
             (generate_eop ?
              ALT_SGDMA_DESCRIPTOR_CONTROL_GENERATE_EOP_MSK : 0x0) |
             (read_fixed ?
              ALT_SGDMA_DESCRIPTOR_CONTROL_READ_FIXED_ADDRESS_MSK : 0x0) |
             (write_fixed_or_sop ?
              ALT_SGDMA_DESCRIPTOR_CONTROL_WRITE_FIXED_ADDRESS_MSK : 0x0) |
             (atlantic_channel ? ((atlantic_channel & 0x0F) << 3) : 0)
                    );
}

static int alt_sgdma_do_sync_transfer(volatile struct alt_sgdma_registers *dev,
                               volatile struct alt_sgdma_descriptor *desc)
{
        unsigned int status;
        int counter = 0;

        /* Wait for any pending transfers to complete */
        alt_sgdma_print_desc(desc);
        status = dev->status;

        counter = 0;
        while (dev->status & ALT_SGDMA_STATUS_BUSY_MSK) {
                if (counter++ > ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                        break;
        }

        if (counter >= ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                debug("Timeout waiting sgdma in do sync!\n");

        /*
         * Clear any (previous) status register information
         * that might occlude our error checking later.
         */
        dev->status = 0xFF;

        /* Point the controller at the descriptor */
        dev->next_descriptor_pointer = (unsigned int)desc & 0x1FFFFFFF;
        debug("next desc in sgdma 0x%x\n",
              (unsigned int)dev->next_descriptor_pointer);

        /*
         * Set up SGDMA controller to:
         * - Disable interrupt generation
         * - Run once a valid descriptor is written to controller
         * - Stop on an error with any particular descriptor
         */
        dev->control = (ALT_SGDMA_CONTROL_RUN_MSK |
                        ALT_SGDMA_CONTROL_STOP_DMA_ER_MSK);

        /* Wait for the descriptor (chain) to complete */
        status = dev->status;
        debug("wait for sgdma....");
        while (dev->status & ALT_SGDMA_STATUS_BUSY_MSK)
                ;
        debug("done\n");

        /* Clear Run */
        dev->control = (dev->control & (~ALT_SGDMA_CONTROL_RUN_MSK));

        /* Get & clear status register contents */
        status = dev->status;
        dev->status = 0xFF;

        /* we really should check if the transfer completes properly */
        debug("tx sgdma status = 0x%x", status);
        return 0;
}

static int alt_sgdma_do_async_transfer(volatile struct alt_sgdma_registers *dev,
                                volatile struct alt_sgdma_descriptor *desc)
{
        int counter = 0;

        /* Wait for any pending transfers to complete */
        alt_sgdma_print_desc(desc);

        counter = 0;
        while (dev->status & ALT_SGDMA_STATUS_BUSY_MSK) {
                if (counter++ > ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                        break;
        }

        if (counter >= ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                debug("Timeout waiting sgdma in do async!\n");

        /*
         * Clear the RUN bit in the control register. This is needed
         * to restart the SGDMA engine later on.
         */
        dev->control = 0;

        /*
         * Clear any (previous) status register information
         * that might occlude our error checking later.
         */
        dev->status = 0xFF;

        /* Point the controller at the descriptor */
        dev->next_descriptor_pointer = (unsigned int)desc & 0x1FFFFFFF;

        /*
         * Set up SGDMA controller to:
         * - Disable interrupt generation
         * - Run once a valid descriptor is written to controller
         * - Stop on an error with any particular descriptor
         */
        dev->control = (ALT_SGDMA_CONTROL_RUN_MSK |
                        ALT_SGDMA_CONTROL_STOP_DMA_ER_MSK);

        /* we really should check if the transfer completes properly */
        return 0;
}

/* u-boot interface */
static int tse_adjust_link(struct altera_tse_priv *priv)
{
        unsigned int refvar;

        refvar = priv->mac_dev->command_config.image;

        if (!(priv->duplexity))
                refvar |= ALTERA_TSE_CMD_HD_ENA_MSK;
        else
                refvar &= ~ALTERA_TSE_CMD_HD_ENA_MSK;

        switch (priv->speed) {
        case 1000:
                refvar |= ALTERA_TSE_CMD_ETH_SPEED_MSK;
                refvar &= ~ALTERA_TSE_CMD_ENA_10_MSK;
                break;
        case 100:
                refvar &= ~ALTERA_TSE_CMD_ETH_SPEED_MSK;
                refvar &= ~ALTERA_TSE_CMD_ENA_10_MSK;
                break;
        case 10:
                refvar &= ~ALTERA_TSE_CMD_ETH_SPEED_MSK;
                refvar |= ALTERA_TSE_CMD_ENA_10_MSK;
                break;
        }
        priv->mac_dev->command_config.image = refvar;

        return 0;
}

static int tse_eth_send(struct eth_device *dev, void *packet, int length)
{
        struct altera_tse_priv *priv = dev->priv;
        volatile struct alt_sgdma_registers *tx_sgdma = priv->sgdma_tx;
        volatile struct alt_sgdma_descriptor *tx_desc =
            (volatile struct alt_sgdma_descriptor *)priv->tx_desc;

        volatile struct alt_sgdma_descriptor *tx_desc_cur =
            (volatile struct alt_sgdma_descriptor *)&tx_desc[0];

        flush_dcache_range((unsigned long)packet,
                        (unsigned long)packet + length);
        alt_sgdma_construct_descriptor_burst(
                (volatile struct alt_sgdma_descriptor *)&tx_desc[0],
                (volatile struct alt_sgdma_descriptor *)&tx_desc[1],
                (unsigned int *)packet, /* read addr */
                (unsigned int *)0,
                length, /* length or EOP ,will change for each tx */
                0x1,    /* gen eop */
                0x0,    /* read fixed */
                0x1,    /* write fixed or sop */
                0x0,    /* read burst */
                0x0,    /* write burst */
                0x0     /* channel */
                );
        debug("TX Packet @ 0x%x,0x%x bytes", (unsigned int)packet, length);

        /* send the packet */
        debug("sending packet\n");
        alt_sgdma_do_sync_transfer(tx_sgdma, tx_desc_cur);
        debug("sent %d bytes\n", tx_desc_cur->actual_bytes_transferred);
        return tx_desc_cur->actual_bytes_transferred;
}

static int tse_eth_rx(struct eth_device *dev)
{
        int packet_length = 0;
        struct altera_tse_priv *priv = dev->priv;
        volatile struct alt_sgdma_descriptor *rx_desc =
            (volatile struct alt_sgdma_descriptor *)priv->rx_desc;
        volatile struct alt_sgdma_descriptor *rx_desc_cur = &rx_desc[0];

        if (rx_desc_cur->descriptor_status &
            ALT_SGDMA_DESCRIPTOR_STATUS_TERMINATED_BY_EOP_MSK) {
                debug("got packet\n");
                packet_length = rx_desc->actual_bytes_transferred;
                net_process_received_packet(net_rx_packets[0], packet_length);

                /* start descriptor again */
                flush_dcache_range((unsigned long)(net_rx_packets[0]),
                                   (unsigned long)(net_rx_packets[0] +
                                                   PKTSIZE_ALIGN));
                alt_sgdma_construct_descriptor_burst(
                        (volatile struct alt_sgdma_descriptor *)&rx_desc[0],
                        (volatile struct alt_sgdma_descriptor *)&rx_desc[1],
                        (unsigned int)0x0,      /* read addr */
                        (unsigned int *)net_rx_packets[0],
                        0x0,    /* length or EOP */
                        0x0,    /* gen eop */
                        0x0,    /* read fixed */
                        0x0,    /* write fixed or sop */
                        0x0,    /* read burst */
                        0x0,    /* write burst */
                        0x0     /* channel */
                    );

                /* setup the sgdma */
                alt_sgdma_do_async_transfer(priv->sgdma_rx, &rx_desc[0]);

                return packet_length;
        }

        return -1;
}

static void tse_eth_halt(struct eth_device *dev)
{
        /* don't do anything! */
        /* this gets called after each uboot  */
        /* network command.  don't need to reset the thing all of the time */
}

static void tse_eth_reset(struct eth_device *dev)
{
        /* stop sgdmas, disable tse receive */
        struct altera_tse_priv *priv = dev->priv;
        volatile struct alt_tse_mac *mac_dev = priv->mac_dev;
        volatile struct alt_sgdma_registers *rx_sgdma = priv->sgdma_rx;
        volatile struct alt_sgdma_registers *tx_sgdma = priv->sgdma_tx;
        int counter;
        volatile struct alt_sgdma_descriptor *rx_desc =
            (volatile struct alt_sgdma_descriptor *)&priv->rx_desc[0];

        /* clear rx desc & wait for sgdma to complete */
        rx_desc->descriptor_control = 0;
        rx_sgdma->control = 0;
        counter = 0;
        while (rx_sgdma->status & ALT_SGDMA_STATUS_BUSY_MSK) {
                if (counter++ > ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                        break;
        }

        if (counter >= ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR) {
                debug("Timeout waiting for rx sgdma!\n");
                rx_sgdma->control = ALT_SGDMA_CONTROL_SOFTWARERESET_MSK;
                rx_sgdma->control = ALT_SGDMA_CONTROL_SOFTWARERESET_MSK;
        }

        counter = 0;
        tx_sgdma->control = 0;
        while (tx_sgdma->status & ALT_SGDMA_STATUS_BUSY_MSK) {
                if (counter++ > ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR)
                        break;
        }

        if (counter >= ALT_TSE_SGDMA_BUSY_WATCHDOG_CNTR) {
                debug("Timeout waiting for tx sgdma!\n");
                tx_sgdma->control = ALT_SGDMA_CONTROL_SOFTWARERESET_MSK;
                tx_sgdma->control = ALT_SGDMA_CONTROL_SOFTWARERESET_MSK;
        }
        /* reset the mac */
        mac_dev->command_config.bits.transmit_enable = 1;
        mac_dev->command_config.bits.receive_enable = 1;
        mac_dev->command_config.bits.software_reset = 1;

        counter = 0;
        while (mac_dev->command_config.bits.software_reset) {
                if (counter++ > ALT_TSE_SW_RESET_WATCHDOG_CNTR)
                        break;
        }

        if (counter >= ALT_TSE_SW_RESET_WATCHDOG_CNTR)
                debug("TSEMAC SW reset bit never cleared!\n");
}

static int tse_mdio_read(struct altera_tse_priv *priv, unsigned int regnum)
{
        volatile struct alt_tse_mac *mac_dev;
        unsigned int *mdio_regs;
        unsigned int data;
        u16 value;

        mac_dev = priv->mac_dev;

        /* set mdio address */
        mac_dev->mdio_phy1_addr = priv->phyaddr;
        mdio_regs = (unsigned int *)&mac_dev->mdio_phy1;

        /* get the data */
        data = mdio_regs[regnum];

        value = data & 0xffff;

        return value;
}

static int tse_mdio_write(struct altera_tse_priv *priv, unsigned int regnum,
                   unsigned int value)
{
        volatile struct alt_tse_mac *mac_dev;
        unsigned int *mdio_regs;
        unsigned int data;

        mac_dev = priv->mac_dev;

        /* set mdio address */
        mac_dev->mdio_phy1_addr = priv->phyaddr;
        mdio_regs = (unsigned int *)&mac_dev->mdio_phy1;

        /* get the data */
        data = (unsigned int)value;

        mdio_regs[regnum] = data;

        return 0;
}

/* MDIO access to phy */
#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) && !defined(BITBANGMII)
static int altera_tse_miiphy_write(const char *devname, unsigned char addr,
                                   unsigned char reg, unsigned short value)
{
        struct eth_device *dev;
        struct altera_tse_priv *priv;
        dev = eth_get_dev_by_name(devname);
        priv = dev->priv;

        tse_mdio_write(priv, (uint) reg, (uint) value);

        return 0;
}

static int altera_tse_miiphy_read(const char *devname, unsigned char addr,
                                  unsigned char reg, unsigned short *value)
{
        struct eth_device *dev;
        struct altera_tse_priv *priv;
        volatile struct alt_tse_mac *mac_dev;
        unsigned int *mdio_regs;

        dev = eth_get_dev_by_name(devname);
        priv = dev->priv;

        mac_dev = priv->mac_dev;
        mac_dev->mdio_phy1_addr = (int)addr;
        mdio_regs = (unsigned int *)&mac_dev->mdio_phy1;

        *value = 0xffff & mdio_regs[reg];

        return 0;

}
#endif

/*
 * Also copied from tsec.c
 */
/* Parse the status register for link, and then do
 * auto-negotiation
 */
static uint mii_parse_sr(uint mii_reg, struct altera_tse_priv *priv)
{
        /*
         * Wait if the link is up, and autonegotiation is in progress
         * (ie - we're capable and it's not done)
         */
        mii_reg = tse_mdio_read(priv, MIIM_STATUS);

        if (!(mii_reg & MIIM_STATUS_LINK) && (mii_reg & BMSR_ANEGCAPABLE)
            && !(mii_reg & BMSR_ANEGCOMPLETE)) {
                int i = 0;

                puts("Waiting for PHY auto negotiation to complete");
                while (!(mii_reg & BMSR_ANEGCOMPLETE)) {
                        /*
                         * Timeout reached ?
                         */
                        if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
                                puts(" TIMEOUT !\n");
                                priv->link = 0;
                                return 0;
                        }

                        if ((i++ % 1000) == 0)
                                putc('.');
                        udelay(1000);   /* 1 ms */
                        mii_reg = tse_mdio_read(priv, MIIM_STATUS);
                }
                puts(" done\n");
                priv->link = 1;
                udelay(500000); /* another 500 ms (results in faster booting) */
        } else {
                if (mii_reg & MIIM_STATUS_LINK) {
                        debug("Link is up\n");
                        priv->link = 1;
                } else {
                        debug("Link is down\n");
                        priv->link = 0;
                }
        }

        return 0;
}

/* Parse the 88E1011's status register for speed and duplex
 * information
 */
static uint mii_parse_88E1011_psr(uint mii_reg, struct altera_tse_priv *priv)
{
        uint speed;

        mii_reg = tse_mdio_read(priv, MIIM_88E1011_PHY_STATUS);

        if ((mii_reg & MIIM_88E1011_PHYSTAT_LINK) &&
            !(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
                int i = 0;

                puts("Waiting for PHY realtime link");
                while (!(mii_reg & MIIM_88E1011_PHYSTAT_SPDDONE)) {
                        /* Timeout reached ? */
                        if (i > PHY_AUTONEGOTIATE_TIMEOUT) {
                                puts(" TIMEOUT !\n");
                                priv->link = 0;
                                break;
                        }

                        if ((i++ == 1000) == 0) {
                                i = 0;
                                puts(".");
                        }
                        udelay(1000);   /* 1 ms */
                        mii_reg = tse_mdio_read(priv, MIIM_88E1011_PHY_STATUS);
                }
                puts(" done\n");
                udelay(500000); /* another 500 ms (results in faster booting) */
        } else {
                if (mii_reg & MIIM_88E1011_PHYSTAT_LINK)
                        priv->link = 1;
                else
                        priv->link = 0;
        }

        if (mii_reg & MIIM_88E1011_PHYSTAT_DUPLEX)
                priv->duplexity = 1;
        else
                priv->duplexity = 0;

        speed = (mii_reg & MIIM_88E1011_PHYSTAT_SPEED);

        switch (speed) {
        case MIIM_88E1011_PHYSTAT_GBIT:
                priv->speed = 1000;
                debug("PHY Speed is 1000Mbit\n");
                break;
        case MIIM_88E1011_PHYSTAT_100:
                debug("PHY Speed is 100Mbit\n");
                priv->speed = 100;
                break;
        default:
                debug("PHY Speed is 10Mbit\n");
                priv->speed = 10;
        }

        return 0;
}

static uint mii_m88e1111s_setmode_sr(uint mii_reg, struct altera_tse_priv *priv)
{
        uint mii_data = tse_mdio_read(priv, mii_reg);
        mii_data &= 0xfff0;
        if ((priv->flags >= 1) && (priv->flags <= 4))
                mii_data |= 0xb;
        else if (priv->flags == 5)
                mii_data |= 0x4;

        return mii_data;
}

static uint mii_m88e1111s_setmode_cr(uint mii_reg, struct altera_tse_priv *priv)
{
        uint mii_data = tse_mdio_read(priv, mii_reg);
        mii_data &= ~0x82;
        if ((priv->flags >= 1) && (priv->flags <= 4))
                mii_data |= 0x82;

        return mii_data;
}

/*
 * Returns which value to write to the control register.
 * For 10/100, the value is slightly different
 */
static uint mii_cr_init(uint mii_reg, struct altera_tse_priv *priv)
{
        return MIIM_CONTROL_INIT;
}

/*
 * PHY & MDIO code
 * Need to add SGMII stuff
 *
 */

static struct phy_info phy_info_M88E1111S = {
        0x01410cc,
        "Marvell 88E1111S",
        4,
        (struct phy_cmd[]){     /* config */
                           /* Reset and configure the PHY */
                           {MIIM_CONTROL, MIIM_CONTROL_RESET, NULL},
                           {MIIM_88E1111_PHY_EXT_SR, 0x848f,
                            &mii_m88e1111s_setmode_sr},
                           /* Delay RGMII TX and RX */
                           {MIIM_88E1111_PHY_EXT_CR, 0x0cd2,
                            &mii_m88e1111s_setmode_cr},
                           {MIIM_GBIT_CONTROL, MIIM_GBIT_CONTROL_INIT, NULL},
                           {MIIM_ANAR, MIIM_ANAR_INIT, NULL},
                           {MIIM_CONTROL, MIIM_CONTROL_RESET, NULL},
                           {MIIM_CONTROL, MIIM_CONTROL_INIT, &mii_cr_init},
                           {miim_end,}
                           },
        (struct phy_cmd[]){     /* startup */
                           /* Status is read once to clear old link state */
                           {MIIM_STATUS, miim_read, NULL},
                           /* Auto-negotiate */
                           {MIIM_STATUS, miim_read, &mii_parse_sr},
                           /* Read the status */
                           {MIIM_88E1011_PHY_STATUS, miim_read,
                            &mii_parse_88E1011_psr},
                           {miim_end,}
                           },
        (struct phy_cmd[]){     /* shutdown */
                           {miim_end,}
                           },
};

/* a generic flavor.  */
static struct phy_info phy_info_generic = {
        0,
        "Unknown/Generic PHY",
        32,
        (struct phy_cmd[]){     /* config */
                           {MII_BMCR, BMCR_RESET, NULL},
                           {MII_BMCR, BMCR_ANENABLE | BMCR_ANRESTART, NULL},
                           {miim_end,}
                           },
        (struct phy_cmd[]){     /* startup */
                           {MII_BMSR, miim_read, NULL},
                           {MII_BMSR, miim_read, &mii_parse_sr},
                           {miim_end,}
                           },
        (struct phy_cmd[]){     /* shutdown */
                           {miim_end,}
                           }
};

static struct phy_info *phy_info[] = {
        &phy_info_M88E1111S,
        NULL
};

 /* Grab the identifier of the device's PHY, and search through
  * all of the known PHYs to see if one matches.         If so, return
  * it, if not, return NULL
  */
static struct phy_info *get_phy_info(struct eth_device *dev)
{
        struct altera_tse_priv *priv = (struct altera_tse_priv *)dev->priv;
        uint phy_reg, phy_ID;
        int i;
        struct phy_info *theInfo = NULL;

        /* Grab the bits from PHYIR1, and put them in the upper half */
        phy_reg = tse_mdio_read(priv, MIIM_PHYIR1);
        phy_ID = (phy_reg & 0xffff) << 16;

        /* Grab the bits from PHYIR2, and put them in the lower half */
        phy_reg = tse_mdio_read(priv, MIIM_PHYIR2);
        phy_ID |= (phy_reg & 0xffff);

        /* loop through all the known PHY types, and find one that */
        /* matches the ID we read from the PHY. */
        for (i = 0; phy_info[i]; i++) {
                if (phy_info[i]->id == (phy_ID >> phy_info[i]->shift)) {
                        theInfo = phy_info[i];
                        break;
                }
        }

        if (theInfo == NULL) {
                theInfo = &phy_info_generic;
                debug("%s: No support for PHY id %x; assuming generic\n",
                      dev->name, phy_ID);
        } else
                debug("%s: PHY is %s (%x)\n", dev->name, theInfo->name, phy_ID);

        return theInfo;
}

/* Execute the given series of commands on the given device's
 * PHY, running functions as necessary
 */
static void phy_run_commands(struct altera_tse_priv *priv, struct phy_cmd *cmd)
{
        int i;
        uint result;

        for (i = 0; cmd->mii_reg != miim_end; i++) {
                if (cmd->mii_data == miim_read) {
                        result = tse_mdio_read(priv, cmd->mii_reg);

                        if (cmd->funct != NULL)
                                (*(cmd->funct)) (result, priv);

                } else {
                        if (cmd->funct != NULL)
                                result = (*(cmd->funct)) (cmd->mii_reg, priv);
                        else
                                result = cmd->mii_data;

                        tse_mdio_write(priv, cmd->mii_reg, result);

                }
                cmd++;
        }
}

/* Phy init code */
static int init_phy(struct eth_device *dev)
{
        struct altera_tse_priv *priv = (struct altera_tse_priv *)dev->priv;
        struct phy_info *curphy;

        /* Get the cmd structure corresponding to the attached
         * PHY */
        curphy = get_phy_info(dev);

        if (curphy == NULL) {
                priv->phyinfo = NULL;
                debug("%s: No PHY found\n", dev->name);

                return 0;
        } else
                debug("%s found\n", curphy->name);
        priv->phyinfo = curphy;

        phy_run_commands(priv, priv->phyinfo->config);

        return 1;
}

static int tse_set_mac_address(struct eth_device *dev)
{
        struct altera_tse_priv *priv = dev->priv;
        volatile struct alt_tse_mac *mac_dev = priv->mac_dev;

        debug("Setting MAC address to 0x%02x%02x%02x%02x%02x%02x\n",
              dev->enetaddr[5], dev->enetaddr[4],
              dev->enetaddr[3], dev->enetaddr[2],
              dev->enetaddr[1], dev->enetaddr[0]);
        mac_dev->mac_addr_0 = ((dev->enetaddr[3]) << 24 |
                               (dev->enetaddr[2]) << 16 |
                               (dev->enetaddr[1]) << 8 | (dev->enetaddr[0]));

        mac_dev->mac_addr_1 = ((dev->enetaddr[5] << 8 |
                                (dev->enetaddr[4])) & 0xFFFF);

        /* Set the MAC address */
        mac_dev->supp_mac_addr_0_0 = mac_dev->mac_addr_0;
        mac_dev->supp_mac_addr_0_1 = mac_dev->mac_addr_1;

        /* Set the MAC address */
        mac_dev->supp_mac_addr_1_0 = mac_dev->mac_addr_0;
        mac_dev->supp_mac_addr_1_1 = mac_dev->mac_addr_1;

        /* Set the MAC address */
        mac_dev->supp_mac_addr_2_0 = mac_dev->mac_addr_0;
        mac_dev->supp_mac_addr_2_1 = mac_dev->mac_addr_1;

        /* Set the MAC address */
        mac_dev->supp_mac_addr_3_0 = mac_dev->mac_addr_0;
        mac_dev->supp_mac_addr_3_1 = mac_dev->mac_addr_1;
        return 0;
}

static int tse_eth_init(struct eth_device *dev, bd_t * bd)
{
        int dat;
        struct altera_tse_priv *priv = dev->priv;
        volatile struct alt_tse_mac *mac_dev = priv->mac_dev;
        volatile struct alt_sgdma_descriptor *tx_desc = priv->tx_desc;
        volatile struct alt_sgdma_descriptor *rx_desc = priv->rx_desc;
        volatile struct alt_sgdma_descriptor *rx_desc_cur =
            (volatile struct alt_sgdma_descriptor *)&rx_desc[0];

        /* stop controller */
        debug("Reseting TSE & SGDMAs\n");
        tse_eth_reset(dev);

        /* start the phy */
        debug("Configuring PHY\n");
        phy_run_commands(priv, priv->phyinfo->startup);

        /* need to create sgdma */
        debug("Configuring tx desc\n");
        alt_sgdma_construct_descriptor_burst(
                (volatile struct alt_sgdma_descriptor *)&tx_desc[0],
                (volatile struct alt_sgdma_descriptor *)&tx_desc[1],
                (unsigned int *)NULL,   /* read addr */
                (unsigned int *)0,
                0,      /* length or EOP ,will change for each tx */
                0x1,    /* gen eop */
                0x0,    /* read fixed */
                0x1,    /* write fixed or sop */
                0x0,    /* read burst */
                0x0,    /* write burst */
                0x0     /* channel */
                );
        debug("Configuring rx desc\n");
        flush_dcache_range((unsigned long)(net_rx_packets[0]),
                           (unsigned long)(net_rx_packets[0]) + PKTSIZE_ALIGN);
        alt_sgdma_construct_descriptor_burst(
                (volatile struct alt_sgdma_descriptor *)&rx_desc[0],
                (volatile struct alt_sgdma_descriptor *)&rx_desc[1],
                (unsigned int)0x0,      /* read addr */
                (unsigned int *)net_rx_packets[0],
                0x0,    /* length or EOP */
                0x0,    /* gen eop */
                0x0,    /* read fixed */
                0x0,    /* write fixed or sop */
                0x0,    /* read burst */
                0x0,    /* write burst */
                0x0     /* channel */
                );
        /* start rx async transfer */
        debug("Starting rx sgdma\n");
        alt_sgdma_do_async_transfer(priv->sgdma_rx, rx_desc_cur);

        /* start TSE */
        debug("Configuring TSE Mac\n");
        /* Initialize MAC registers */
        mac_dev->max_frame_length = PKTSIZE_ALIGN;
        mac_dev->rx_almost_empty_threshold = 8;
        mac_dev->rx_almost_full_threshold = 8;
        mac_dev->tx_almost_empty_threshold = 8;
        mac_dev->tx_almost_full_threshold = 3;
        mac_dev->tx_sel_empty_threshold =
            CONFIG_SYS_ALTERA_TSE_TX_FIFO - 16;
        mac_dev->tx_sel_full_threshold = 0;
        mac_dev->rx_sel_empty_threshold =
            CONFIG_SYS_ALTERA_TSE_TX_FIFO - 16;
        mac_dev->rx_sel_full_threshold = 0;

        /* NO Shift */
        mac_dev->rx_cmd_stat.bits.rx_shift16 = 0;
        mac_dev->tx_cmd_stat.bits.tx_shift16 = 0;

        /* enable MAC */
        dat = 0;
        dat = ALTERA_TSE_CMD_TX_ENA_MSK | ALTERA_TSE_CMD_RX_ENA_MSK;

        mac_dev->command_config.image = dat;

        /* configure the TSE core  */
        /*  -- output clocks,  */
        /*  -- and later config stuff for SGMII */
        if (priv->link) {
                debug("Adjusting TSE to link speed\n");
                tse_adjust_link(priv);
        }

        return priv->link ? 0 : -1;
}

/* TSE init code */
int altera_tse_initialize(u8 dev_num, int mac_base,
                          int sgdma_rx_base, int sgdma_tx_base,
                          u32 sgdma_desc_base, u32 sgdma_desc_size)
{
        struct altera_tse_priv *priv;
        struct eth_device *dev;
        struct alt_sgdma_descriptor *rx_desc;
        struct alt_sgdma_descriptor *tx_desc;
        unsigned long dma_handle;

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

        if (NULL == dev)
                return 0;

        memset(dev, 0, sizeof *dev);

        priv = malloc(sizeof(*priv));

        if (!priv) {
                free(dev);
                return 0;
        }
        if (sgdma_desc_size) {
                if (sgdma_desc_size < (sizeof(*tx_desc) * (3 + PKTBUFSRX))) {
                        printf("ALTERA_TSE-%hu: "
                               "descriptor memory is too small\n", dev_num);
                        free(priv);
                        free(dev);
                        return 0;
                }
                tx_desc = (struct alt_sgdma_descriptor *)sgdma_desc_base;
        } else {
                tx_desc = dma_alloc_coherent(sizeof(*tx_desc) * (3 + PKTBUFSRX),
                                             &dma_handle);
        }

        rx_desc = tx_desc + 2;
        debug("tx desc: address = 0x%x\n", (unsigned int)tx_desc);
        debug("rx desc: address = 0x%x\n", (unsigned int)rx_desc);

        if (!tx_desc) {
                free(priv);
                free(dev);
                return 0;
        }
        memset(rx_desc, 0, (sizeof *rx_desc) * (PKTBUFSRX + 1));
        memset(tx_desc, 0, (sizeof *tx_desc) * 2);

        /* initialize tse priv */
        priv->mac_dev = (volatile struct alt_tse_mac *)mac_base;
        priv->sgdma_rx = (volatile struct alt_sgdma_registers *)sgdma_rx_base;
        priv->sgdma_tx = (volatile struct alt_sgdma_registers *)sgdma_tx_base;
        priv->phyaddr = CONFIG_SYS_ALTERA_TSE_PHY_ADDR;
        priv->flags = CONFIG_SYS_ALTERA_TSE_FLAGS;
        priv->rx_desc = rx_desc;
        priv->tx_desc = tx_desc;

        /* init eth structure */
        dev->priv = priv;
        dev->init = tse_eth_init;
        dev->halt = tse_eth_halt;
        dev->send = tse_eth_send;
        dev->recv = tse_eth_rx;
        dev->write_hwaddr = tse_set_mac_address;
        sprintf(dev->name, "%s-%hu", "ALTERA_TSE", dev_num);

        eth_register(dev);

#if defined(CONFIG_MII) || defined(CONFIG_CMD_MII) && !defined(BITBANGMII)
        miiphy_register(dev->name, altera_tse_miiphy_read,
                        altera_tse_miiphy_write);
#endif

        init_phy(dev);

        return 1;
}