1/*
2 * drivers/net/ethernet/ibm/emac/zmii.h
3 *
4 * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge 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 (c) 2004, 2005 Zultys Technologies.
12 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
13 *
14 * Based on original work by
15 *      Armin Kuster <akuster@mvista.com>
16 * 	Copyright 2001 MontaVista Softare Inc.
17 *
18 * This program is free software; you can redistribute  it and/or modify it
19 * under  the terms of  the GNU General  Public License as published by the
20 * Free Software Foundation;  either version 2 of the  License, or (at your
21 * option) any later version.
22 *
23 */
24#ifndef __IBM_NEWEMAC_ZMII_H
25#define __IBM_NEWEMAC_ZMII_H
26
27/* ZMII bridge registers */
28struct zmii_regs {
29	u32 fer;		/* Function enable reg */
30	u32 ssr;		/* Speed select reg */
31	u32 smiirs;		/* SMII status reg */
32};
33
34/* ZMII device */
35struct zmii_instance {
36	struct zmii_regs __iomem	*base;
37
38	/* Only one EMAC whacks us at a time */
39	struct mutex			lock;
40
41	/* subset of PHY_MODE_XXXX */
42	int				mode;
43
44	/* number of EMACs using this ZMII bridge */
45	int				users;
46
47	/* FER value left by firmware */
48	u32				fer_save;
49
50	/* OF device instance */
51	struct platform_device		*ofdev;
52};
53
54#ifdef CONFIG_IBM_EMAC_ZMII
55
56int zmii_init(void);
57void zmii_exit(void);
58int zmii_attach(struct platform_device *ofdev, int input, int *mode);
59void zmii_detach(struct platform_device *ofdev, int input);
60void zmii_get_mdio(struct platform_device *ofdev, int input);
61void zmii_put_mdio(struct platform_device *ofdev, int input);
62void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
63int zmii_get_regs_len(struct platform_device *ocpdev);
64void *zmii_dump_regs(struct platform_device *ofdev, void *buf);
65
66#else
67# define zmii_init()		0
68# define zmii_exit()		do { } while(0)
69# define zmii_attach(x,y,z)	(-ENXIO)
70# define zmii_detach(x,y)	do { } while(0)
71# define zmii_get_mdio(x,y)	do { } while(0)
72# define zmii_put_mdio(x,y)	do { } while(0)
73# define zmii_set_speed(x,y,z)	do { } while(0)
74# define zmii_get_regs_len(x)	0
75# define zmii_dump_regs(x,buf)	(buf)
76#endif				/* !CONFIG_IBM_EMAC_ZMII */
77
78#endif /* __IBM_NEWEMAC_ZMII_H */
79