LXR linux/drivers/net/ethernet/ibm/emac/tah.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/*
   3 * drivers/net/ethernet/ibm/emac/tah.h
   4 *
   5 * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
   6 *
   7 * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
   8 *                <benh@kernel.crashing.org>
   9 *
  10 * Based on the arch/ppc version of the driver:
  11 *
  12 * Copyright 2004 MontaVista Software, Inc.
  13 * Matt Porter <mporter@kernel.crashing.org>
  14 *
  15 * Copyright (c) 2005 Eugene Surovegin <ebs@ebshome.net>
  16 */
  17
  18#ifndef __IBM_NEWEMAC_TAH_H
  19#define __IBM_NEWEMAC_TAH_H
  20
  21/* TAH */
  22struct tah_regs {
  23        u32 revid;
  24        u32 pad[3];
  25        u32 mr;
  26        u32 ssr0;
  27        u32 ssr1;
  28        u32 ssr2;
  29        u32 ssr3;
  30        u32 ssr4;
  31        u32 ssr5;
  32        u32 tsr;
  33};
  34
  35
  36/* TAH device */
  37struct tah_instance {
  38        struct tah_regs __iomem         *base;
  39
  40        /* Only one EMAC whacks us at a time */
  41        struct mutex                    lock;
  42
  43        /* number of EMACs using this TAH */
  44        int                             users;
  45
  46        /* OF device instance */
  47        struct platform_device          *ofdev;
  48};
  49
  50
  51/* TAH engine */
  52#define TAH_MR_CVR              0x80000000
  53#define TAH_MR_SR               0x40000000
  54#define TAH_MR_ST_256           0x01000000
  55#define TAH_MR_ST_512           0x02000000
  56#define TAH_MR_ST_768           0x03000000
  57#define TAH_MR_ST_1024          0x04000000
  58#define TAH_MR_ST_1280          0x05000000
  59#define TAH_MR_ST_1536          0x06000000
  60#define TAH_MR_TFS_16KB         0x00000000
  61#define TAH_MR_TFS_2KB          0x00200000
  62#define TAH_MR_TFS_4KB          0x00400000
  63#define TAH_MR_TFS_6KB          0x00600000
  64#define TAH_MR_TFS_8KB          0x00800000
  65#define TAH_MR_TFS_10KB         0x00a00000
  66#define TAH_MR_DTFP             0x00100000
  67#define TAH_MR_DIG              0x00080000
  68
  69#ifdef CONFIG_IBM_EMAC_TAH
  70
  71int tah_init(void);
  72void tah_exit(void);
  73int tah_attach(struct platform_device *ofdev, int channel);
  74void tah_detach(struct platform_device *ofdev, int channel);
  75void tah_reset(struct platform_device *ofdev);
  76int tah_get_regs_len(struct platform_device *ofdev);
  77void *tah_dump_regs(struct platform_device *ofdev, void *buf);
  78
  79#else
  80
  81# define tah_init()             0
  82# define tah_exit()             do { } while(0)
  83# define tah_attach(x,y)        (-ENXIO)
  84# define tah_detach(x,y)        do { } while(0)
  85# define tah_reset(x)           do { } while(0)
  86# define tah_get_regs_len(x)    0
  87# define tah_dump_regs(x,buf)   (buf)
  88
  89#endif                          /* !CONFIG_IBM_EMAC_TAH */
  90
  91#endif /* __IBM_NEWEMAC_TAH_H */
  92