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tah.h
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1 /*
2  * drivers/net/ethernet/ibm/emac/tah.h
3  *
4  * Driver for PowerPC 4xx on-chip ethernet controller, TAH support.
5  *
6  * Copyright 2007 Benjamin Herrenschmidt, IBM Corp.
8  *
9  * Based on the arch/ppc version of the driver:
10  *
11  * Copyright 2004 MontaVista Software, Inc.
12  * Matt Porter <[email protected]>
13  *
14  * Copyright (c) 2005 Eugene Surovegin <[email protected]>
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 {
28  u32 pad[3];
37 };
38 
39 
40 /* TAH device */
41 struct tah_instance {
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 */
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_EMAC_TAH
74 
75 extern int tah_init(void);
76 extern void tah_exit(void);
77 extern int tah_attach(struct platform_device *ofdev, int channel);
78 extern void tah_detach(struct platform_device *ofdev, int channel);
79 extern void tah_reset(struct platform_device *ofdev);
80 extern int tah_get_regs_len(struct platform_device *ofdev);
81 extern void *tah_dump_regs(struct platform_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_EMAC_TAH */
94 
95 #endif /* __IBM_NEWEMAC_TAH_H */