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 */
  22 struct 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 */
  37 struct 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
  71 int tah_init(void);
  72 void tah_exit(void);
  73 int tah_attach(struct platform_device *ofdev, int channel);
  74 void tah_detach(struct platform_device *ofdev, int channel);
  75 void tah_reset(struct platform_device *ofdev);
  76 int tah_get_regs_len(struct platform_device *ofdev);
  77 void *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 */