tah.h

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/*
 * drivers/net/ethernet/ibm/emac/tah.h
 *
 * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
 *
 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
 *                <[email protected]>
 *
 * Based on the arch/ppc version of the driver:
 *
 * Copyright 2004 MontaVista Software, Inc.
 * Matt Porter <[email protected]>
 *
 * Copyright (c) 2005 Eugene Surovegin <[email protected]>
 *
 * 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_TAH_H
#define __IBM_NEWEMAC_TAH_H

/* TAH */
struct tah_regs {
    u32 revid;
    u32 pad[3];
    u32 mr;
    u32 ssr0;
    u32 ssr1;
    u32 ssr2;
    u32 ssr3;
    u32 ssr4;
    u32 ssr5;
    u32 tsr;
};


/* TAH device */
struct tah_instance {
    struct tah_regs __iomem     *base;

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

    /* number of EMACs using this TAH */
    int             users;

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


/* TAH engine */
#define TAH_MR_CVR      0x80000000
#define TAH_MR_SR       0x40000000
#define TAH_MR_ST_256       0x01000000
#define TAH_MR_ST_512       0x02000000
#define TAH_MR_ST_768       0x03000000
#define TAH_MR_ST_1024      0x04000000
#define TAH_MR_ST_1280      0x05000000
#define TAH_MR_ST_1536      0x06000000
#define TAH_MR_TFS_16KB     0x00000000
#define TAH_MR_TFS_2KB      0x00200000
#define TAH_MR_TFS_4KB      0x00400000
#define TAH_MR_TFS_6KB      0x00600000
#define TAH_MR_TFS_8KB      0x00800000
#define TAH_MR_TFS_10KB     0x00a00000
#define TAH_MR_DTFP     0x00100000
#define TAH_MR_DIG      0x00080000

#ifdef CONFIG_IBM_EMAC_TAH

extern int tah_init(void);
extern void tah_exit(void);
extern int tah_attach(struct platform_device *ofdev, int channel);
extern void tah_detach(struct platform_device *ofdev, int channel);
extern void tah_reset(struct platform_device *ofdev);
extern int tah_get_regs_len(struct platform_device *ofdev);
extern void *tah_dump_regs(struct platform_device *ofdev, void *buf);

#else

# define tah_init()     0
# define tah_exit()     do { } while(0)
# define tah_attach(x,y)    (-ENXIO)
# define tah_detach(x,y)    do { } while(0)
# define tah_reset(x)       do { } while(0)
# define tah_get_regs_len(x)    0
# define tah_dump_regs(x,buf)   (buf)

#endif              /* !CONFIG_IBM_EMAC_TAH */

#endif /* __IBM_NEWEMAC_TAH_H */