1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * drivers/net/ethernet/ibm/emac/zmii.h
4 *
5 * Driver for PowerPC 4xx on-chip ethernet controller, ZMII bridge 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 (c) 2004, 2005 Zultys Technologies.
13 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
14 *
15 * Based on original work by
16 *      Armin Kuster <akuster@mvista.com>
17 * 	Copyright 2001 MontaVista Softare Inc.
18 */
19#ifndef __IBM_NEWEMAC_ZMII_H
20#define __IBM_NEWEMAC_ZMII_H
21
22/* ZMII bridge registers */
23struct zmii_regs {
24	u32 fer;		/* Function enable reg */
25	u32 ssr;		/* Speed select reg */
26	u32 smiirs;		/* SMII status reg */
27};
28
29/* ZMII device */
30struct zmii_instance {
31	struct zmii_regs __iomem	*base;
32
33	/* Only one EMAC whacks us at a time */
34	struct mutex			lock;
35
36	/* subset of PHY_MODE_XXXX */
37	int				mode;
38
39	/* number of EMACs using this ZMII bridge */
40	int				users;
41
42	/* FER value left by firmware */
43	u32				fer_save;
44
45	/* OF device instance */
46	struct platform_device		*ofdev;
47};
48
49#ifdef CONFIG_IBM_EMAC_ZMII
50
51int zmii_init(void);
52void zmii_exit(void);
53int zmii_attach(struct platform_device *ofdev, int input,
54		phy_interface_t *mode);
55void zmii_detach(struct platform_device *ofdev, int input);
56void zmii_get_mdio(struct platform_device *ofdev, int input);
57void zmii_put_mdio(struct platform_device *ofdev, int input);
58void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
59int zmii_get_regs_len(struct platform_device *ocpdev);
60void *zmii_dump_regs(struct platform_device *ofdev, void *buf);
61
62#else
63# define zmii_init()		0
64# define zmii_exit()		do { } while(0)
65# define zmii_attach(x,y,z)	(-ENXIO)
66# define zmii_detach(x,y)	do { } while(0)
67# define zmii_get_mdio(x,y)	do { } while(0)
68# define zmii_put_mdio(x,y)	do { } while(0)
69# define zmii_set_speed(x,y,z)	do { } while(0)
70# define zmii_get_regs_len(x)	0
71# define zmii_dump_regs(x,buf)	(buf)
72#endif				/* !CONFIG_IBM_EMAC_ZMII */
73
74#endif /* __IBM_NEWEMAC_ZMII_H */
75