my3126.c

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/* $Date: 2005/11/12 02:13:49 $ $RCSfile: my3126.c,v $ $Revision: 1.15 $ */
#include "cphy.h"
#include "elmer0.h"
#include "suni1x10gexp_regs.h"

/* Port Reset */
static int my3126_reset(struct cphy *cphy, int wait)
{
    /*
     * This can be done through registers.  It is not required since
     * a full chip reset is used.
     */
    return 0;
}

static int my3126_interrupt_enable(struct cphy *cphy)
{
    schedule_delayed_work(&cphy->phy_update, HZ/30);
    t1_tpi_read(cphy->adapter, A_ELMER0_GPO, &cphy->elmer_gpo);
    return 0;
}

static int my3126_interrupt_disable(struct cphy *cphy)
{
    cancel_delayed_work_sync(&cphy->phy_update);
    return 0;
}

static int my3126_interrupt_clear(struct cphy *cphy)
{
    return 0;
}

#define OFFSET(REG_ADDR)    (REG_ADDR << 2)

static int my3126_interrupt_handler(struct cphy *cphy)
{
    u32 val;
    u16 val16;
    u16 status;
    u32 act_count;
    adapter_t *adapter;
    adapter = cphy->adapter;

    if (cphy->count == 50) {
        cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
        val16 = (u16) val;
        status = cphy->bmsr ^ val16;

        if (status & MDIO_STAT1_LSTATUS)
            t1_link_changed(adapter, 0);
        cphy->bmsr = val16;

        /* We have only enabled link change interrupts so it
           must be that
         */
        cphy->count = 0;
    }

    t1_tpi_write(adapter, OFFSET(SUNI1x10GEXP_REG_MSTAT_CONTROL),
        SUNI1x10GEXP_BITMSK_MSTAT_SNAP);
    t1_tpi_read(adapter,
        OFFSET(SUNI1x10GEXP_REG_MSTAT_COUNTER_1_LOW), &act_count);
    t1_tpi_read(adapter,
        OFFSET(SUNI1x10GEXP_REG_MSTAT_COUNTER_33_LOW), &val);
    act_count += val;

    /* Populate elmer_gpo with the register value */
    t1_tpi_read(adapter, A_ELMER0_GPO, &val);
    cphy->elmer_gpo = val;

    if ( (val & (1 << 8)) || (val & (1 << 19)) ||
         (cphy->act_count == act_count) || cphy->act_on ) {
        if (is_T2(adapter))
            val |= (1 << 9);
        else if (t1_is_T1B(adapter))
            val |= (1 << 20);
        cphy->act_on = 0;
    } else {
        if (is_T2(adapter))
            val &= ~(1 << 9);
        else if (t1_is_T1B(adapter))
            val &= ~(1 << 20);
        cphy->act_on = 1;
    }

    t1_tpi_write(adapter, A_ELMER0_GPO, val);

    cphy->elmer_gpo = val;
    cphy->act_count = act_count;
    cphy->count++;

    return cphy_cause_link_change;
}

static void my3216_poll(struct work_struct *work)
{
    struct cphy *cphy = container_of(work, struct cphy, phy_update.work);

    my3126_interrupt_handler(cphy);
}

static int my3126_set_loopback(struct cphy *cphy, int on)
{
    return 0;
}

/* To check the activity LED */
static int my3126_get_link_status(struct cphy *cphy,
            int *link_ok, int *speed, int *duplex, int *fc)
{
    u32 val;
    u16 val16;
    adapter_t *adapter;

    adapter = cphy->adapter;
    cphy_mdio_read(cphy, MDIO_MMD_PMAPMD, MDIO_STAT1, &val);
    val16 = (u16) val;

    /* Populate elmer_gpo with the register value */
    t1_tpi_read(adapter, A_ELMER0_GPO, &val);
    cphy->elmer_gpo = val;

    *link_ok = (val16 & MDIO_STAT1_LSTATUS);

    if (*link_ok) {
        /* Turn on the LED. */
        if (is_T2(adapter))
             val &= ~(1 << 8);
        else if (t1_is_T1B(adapter))
             val &= ~(1 << 19);
    } else {
        /* Turn off the LED. */
        if (is_T2(adapter))
             val |= (1 << 8);
        else if (t1_is_T1B(adapter))
             val |= (1 << 19);
    }

    t1_tpi_write(adapter, A_ELMER0_GPO, val);
    cphy->elmer_gpo = val;
    *speed = SPEED_10000;
    *duplex = DUPLEX_FULL;

    /* need to add flow control */
    if (fc)
        *fc = PAUSE_RX | PAUSE_TX;

    return 0;
}

static void my3126_destroy(struct cphy *cphy)
{
    kfree(cphy);
}

static struct cphy_ops my3126_ops = {
    .destroy        = my3126_destroy,
    .reset          = my3126_reset,
    .interrupt_enable   = my3126_interrupt_enable,
    .interrupt_disable  = my3126_interrupt_disable,
    .interrupt_clear    = my3126_interrupt_clear,
    .interrupt_handler  = my3126_interrupt_handler,
    .get_link_status    = my3126_get_link_status,
    .set_loopback       = my3126_set_loopback,
    .mmds           = (MDIO_DEVS_PMAPMD | MDIO_DEVS_PCS |
                   MDIO_DEVS_PHYXS),
};

static struct cphy *my3126_phy_create(struct net_device *dev,
            int phy_addr, const struct mdio_ops *mdio_ops)
{
    struct cphy *cphy = kzalloc(sizeof (*cphy), GFP_KERNEL);

    if (!cphy)
        return NULL;

    cphy_init(cphy, dev, phy_addr, &my3126_ops, mdio_ops);
    INIT_DELAYED_WORK(&cphy->phy_update, my3216_poll);
    cphy->bmsr = 0;

    return cphy;
}

/* Chip Reset */
static int my3126_phy_reset(adapter_t * adapter)
{
    u32 val;

    t1_tpi_read(adapter, A_ELMER0_GPO, &val);
    val &= ~4;
    t1_tpi_write(adapter, A_ELMER0_GPO, val);
    msleep(100);

    t1_tpi_write(adapter, A_ELMER0_GPO, val | 4);
    msleep(1000);

    /* Now lets enable the Laser. Delay 100us */
    t1_tpi_read(adapter, A_ELMER0_GPO, &val);
    val |= 0x8000;
    t1_tpi_write(adapter, A_ELMER0_GPO, val);
    udelay(100);
    return 0;
}

const struct gphy t1_my3126_ops = {
    .create = my3126_phy_create,
    .reset = my3126_phy_reset
};