LXR linux/drivers/net/ibm

   1/*
   2 * drivers/net/ibm_newemac/tah.h
   3 *
   4 * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
   5 *
   6 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
   7 *                <benh@kernel.crashing.org>
   8 *
   9 * Based on the arch/ppc version of the driver:
  10 *
  11 * Copyright 2004 MontaVista Software, Inc.
  12 * Matt Porter <mporter@kernel.crashing.org>
  13 *
  14 * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
  15 *
  16 * This program is free software; you can redistribute  it and/or modify it
  17 * under  the terms of  the GNU General  Public License as published by the
  18 * Free Software Foundation;  either version 2 of the  License, or (at your
  19 * option) any later version.
  20 */
  21
  22#ifndef __IBM_NEWEMAC_TAH_H
  23#define __IBM_NEWEMAC_TAH_H
  24
  25/* TAH */
  26struct tah_regs {
  27        u32 revid;
  28        u32 pad[3];
  29        u32 mr;
  30        u32 ssr0;
  31        u32 ssr1;
  32        u32 ssr2;
  33        u32 ssr3;
  34        u32 ssr4;
  35        u32 ssr5;
  36        u32 tsr;
  37};
  38
  39
  40/* TAH device */
  41struct tah_instance {
  42        struct tah_regs __iomem         *base;
  43
  44        /* Only one EMAC whacks us at a time */
  45        struct mutex                    lock;
  46
  47        /* number of EMACs using this TAH */
  48        int                             users;
  49
  50        /* OF device instance */
  51        struct of_device                *ofdev;
  52};
  53
  54
  55/* TAH engine */
  56#define TAH_MR_CVR              0x80000000
  57#define TAH_MR_SR               0x40000000
  58#define TAH_MR_ST_256           0x01000000
  59#define TAH_MR_ST_512           0x02000000
  60#define TAH_MR_ST_768           0x03000000
  61#define TAH_MR_ST_1024          0x04000000
  62#define TAH_MR_ST_1280          0x05000000
  63#define TAH_MR_ST_1536          0x06000000
  64#define TAH_MR_TFS_16KB         0x00000000
  65#define TAH_MR_TFS_2KB          0x00200000
  66#define TAH_MR_TFS_4KB          0x00400000
  67#define TAH_MR_TFS_6KB          0x00600000
  68#define TAH_MR_TFS_8KB          0x00800000
  69#define TAH_MR_TFS_10KB         0x00a00000
  70#define TAH_MR_DTFP             0x00100000
  71#define TAH_MR_DIG              0x00080000
  72
  73#ifdef CONFIG_IBM_NEW_EMAC_TAH
  74
  75extern int tah_init(void);
  76extern void tah_exit(void);
  77extern int tah_attach(struct of_device *ofdev, int channel);
  78extern void tah_detach(struct of_device *ofdev, int channel);
  79extern void tah_reset(struct of_device *ofdev);
  80extern int tah_get_regs_len(struct of_device *ofdev);
  81extern void *tah_dump_regs(struct of_device *ofdev, void *buf);
  82
  83#else
  84
  85# define tah_init()             0
  86# define tah_exit()             do { } while(0)
  87# define tah_attach(x,y)        (-ENXIO)
  88# define tah_detach(x,y)        do { } while(0)
  89# define tah_reset(x)           do { } while(0)
  90# define tah_get_regs_len(x)    0
  91# define tah_dump_regs(x,buf)   (buf)
  92
  93#endif                          /* !CONFIG_IBM_NEW_EMAC_TAH */
  94
  95#endif /* __IBM_NEWEMAC_TAH_H */
  96