drivers/net/ibm_newemac/tah.h

   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 */
  26 struct 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 */
  41 struct 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
  75 extern int tah_init(void);
  76 extern void tah_exit(void);
  77 extern int tah_attach(struct of_device *ofdev, int channel);
  78 extern void tah_detach(struct of_device *ofdev, int channel);
  79 extern void tah_reset(struct of_device *ofdev);
  80 extern int tah_get_regs_len(struct of_device *ofdev);
  81 extern 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 */