zmii.h

Go to the documentation of this file.

/*
 * drivers/net/ethernet/ibm/emac/zmii.h
 *
 * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge support.
 *
 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
 *                <[email protected]>
 *
 * Based on the arch/ppc version of the driver:
 *
 * Copyright (c) 2004, 2005 Zultys Technologies.
 * Eugene Surovegin <[email protected]> or <[email protected]>
 *
 * Based on original work by
 *      Armin Kuster <[email protected]>
 *  Copyright 2001 MontaVista Softare 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.
 *
 */
#ifndef __IBM_NEWEMAC_ZMII_H
#define __IBM_NEWEMAC_ZMII_H

/* ZMII bridge registers */
struct zmii_regs {
    u32 fer;        /* Function enable reg */
    u32 ssr;        /* Speed select reg */
    u32 smiirs;     /* SMII status reg */
};

/* ZMII device */
struct zmii_instance {
    struct zmii_regs __iomem    *base;

    /* Only one EMAC whacks us at a time */
    struct mutex            lock;

    /* subset of PHY_MODE_XXXX */
    int             mode;

    /* number of EMACs using this ZMII bridge */
    int             users;

    /* FER value left by firmware */
    u32             fer_save;

    /* OF device instance */
    struct platform_device      *ofdev;
};

#ifdef CONFIG_IBM_EMAC_ZMII

extern int zmii_init(void);
extern void zmii_exit(void);
extern int zmii_attach(struct platform_device *ofdev, int input, int *mode);
extern void zmii_detach(struct platform_device *ofdev, int input);
extern void zmii_get_mdio(struct platform_device *ofdev, int input);
extern void zmii_put_mdio(struct platform_device *ofdev, int input);
extern void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
extern int zmii_get_regs_len(struct platform_device *ocpdev);
extern void *zmii_dump_regs(struct platform_device *ofdev, void *buf);

#else
# define zmii_init()        0
# define zmii_exit()        do { } while(0)
# define zmii_attach(x,y,z) (-ENXIO)
# define zmii_detach(x,y)   do { } while(0)
# define zmii_get_mdio(x,y) do { } while(0)
# define zmii_put_mdio(x,y) do { } while(0)
# define zmii_set_speed(x,y,z)  do { } while(0)
# define zmii_get_regs_len(x)   0
# define zmii_dump_regs(x,buf)  (buf)
#endif              /* !CONFIG_IBM_EMAC_ZMII */

#endif /* __IBM_NEWEMAC_ZMII_H */