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/*

 * drivers/net/phy/qsemi.c

 *

 * Driver for Quality Semiconductor PHYs

 *

 * Author: Andy Fleming

 *

 * Copyright (c) 2004 Freescale Semiconductor, Inc.

 *

 * This program is free software; you can redistribute  it and/or modify it

 * under  the terms of  the GNU General  Public License as published by the

 * Free Software Foundation;  either version 2 of the  License, or (at your

 * option) any later version.

 *

 */

#include <linux/kernel.h>

#include <linux/string.h>

#include <linux/errno.h>

#include <linux/unistd.h>

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/init.h>

#include <linux/delay.h>

#include <linux/netdevice.h>

#include <linux/etherdevice.h>

#include <linux/skbuff.h>

#include <linux/spinlock.h>

#include <linux/mm.h>

#include <linux/module.h>

#include <linux/mii.h>

#include <linux/ethtool.h>

#include <linux/phy.h>

#include <asm/io.h>

#include <asm/irq.h>

#include <asm/uaccess.h>

/* ------------------------------------------------------------------------- */

/* The Quality Semiconductor QS6612 is used on the RPX CLLF                  */

/* register definitions */

#define MII_QS6612_MCR          17  /* Mode Control Register      */

#define MII_QS6612_FTR          27  /* Factory Test Register      */

#define MII_QS6612_MCO          28  /* Misc. Control Register     */

#define MII_QS6612_ISR          29  /* Interrupt Source Register  */

#define MII_QS6612_IMR          30  /* Interrupt Mask Register    */

#define MII_QS6612_IMR_INIT     0x003a

#define MII_QS6612_PCR          31  /* 100BaseTx PHY Control Reg. */

#define QS6612_PCR_AN_COMPLETE  0x1000

#define QS6612_PCR_RLBEN        0x0200

#define QS6612_PCR_DCREN        0x0100

#define QS6612_PCR_4B5BEN       0x0040

#define QS6612_PCR_TX_ISOLATE   0x0020

#define QS6612_PCR_MLT3_DIS     0x0002

#define QS6612_PCR_SCRM_DESCRM  0x0001

MODULE_DESCRIPTION("Quality Semiconductor PHY driver");

MODULE_AUTHOR("Andy Fleming");

MODULE_LICENSE("GPL");

/* Returns 0, unless there's a write error */

static int qs6612_config_init(struct phy_device *phydev)

{

        /* The PHY powers up isolated on the RPX,

         * so send a command to allow operation.

         * XXX - My docs indicate this should be 0x0940

         * ...or something.  The current value sets three

         * reserved bits, bit 11, which specifies it should be

         * set to one, bit 10, which specifies it should be set

         * to 0, and bit 7, which doesn't specify.  However, my

         * docs are preliminary, and I will leave it like this

         * until someone more knowledgable corrects me or it.

         * -- Andy Fleming

         */

        return phy_write(phydev, MII_QS6612_PCR, 0x0dc0);

}

static int qs6612_ack_interrupt(struct phy_device *phydev)

{

        int err;

        err = phy_read(phydev, MII_QS6612_ISR);

        if (err < 0)

                return err;

        err = phy_read(phydev, MII_BMSR);

        if (err < 0)

                return err;

        err = phy_read(phydev, MII_EXPANSION);

        if (err < 0)

                return err;

        return 0;

}

static int qs6612_config_intr(struct phy_device *phydev)

{

        int err;

        if (phydev->interrupts == PHY_INTERRUPT_ENABLED)

                err = phy_write(phydev, MII_QS6612_IMR,

                                MII_QS6612_IMR_INIT);

        else

                err = phy_write(phydev, MII_QS6612_IMR, 0);

        return err;

}

static struct phy_driver qs6612_driver = {

        .phy_id         = 0x00181440,

        .name           = "QS6612",

        .phy_id_mask    = 0xfffffff0,

        .features       = PHY_BASIC_FEATURES,

        .flags          = PHY_HAS_INTERRUPT,

        .config_init    = qs6612_config_init,

        .config_aneg    = genphy_config_aneg,

        .read_status    = genphy_read_status,

        .ack_interrupt  = qs6612_ack_interrupt,

        .config_intr    = qs6612_config_intr,

        .driver         = { .owner = THIS_MODULE,},

};

static int __init qs6612_init(void)

{

        return phy_driver_register(&qs6612_driver);

}

static void __exit qs6612_exit(void)

{

        phy_driver_unregister(&qs6612_driver);

}

module_init(qs6612_init);

module_exit(qs6612_exit);