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 */
92