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 */
96
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