1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 * drivers/net/ethernet/ibm/emac/rgmii.h
4 *
5 * Driver for PowerPC 4xx on-chip ethernet controller, RGMII 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 * Based on ocp_zmii.h/ibm_emac_zmii.h
13 * Armin Kuster akuster@mvista.com
14 *
15 * Copyright 2004 MontaVista Software, Inc.
16 * Matt Porter <mporter@kernel.crashing.org>
17 *
18 * Copyright (c) 2004, 2005 Zultys Technologies.
19 * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>
20 */
21
22#ifndef __IBM_NEWEMAC_RGMII_H
23#define __IBM_NEWEMAC_RGMII_H
24
25/* RGMII bridge type */
26#define RGMII_STANDARD		0
27#define RGMII_AXON		1
28
29/* RGMII bridge */
30struct rgmii_regs {
31	u32 fer;		/* Function enable register */
32	u32 ssr;		/* Speed select register */
33};
34
35/* RGMII device */
36struct rgmii_instance {
37	struct rgmii_regs __iomem	*base;
38
39	/* RGMII bridge flags */
40	int				flags;
41#define EMAC_RGMII_FLAG_HAS_MDIO	0x00000001
42
43	/* Only one EMAC whacks us at a time */
44	struct mutex			lock;
45
46	/* number of EMACs using this RGMII bridge */
47	int				users;
48
49	/* OF device instance */
50	struct platform_device		*ofdev;
51};
52
53#ifdef CONFIG_IBM_EMAC_RGMII
54
55int rgmii_init(void);
56void rgmii_exit(void);
57int rgmii_attach(struct platform_device *ofdev, int input, int mode);
58void rgmii_detach(struct platform_device *ofdev, int input);
59void rgmii_get_mdio(struct platform_device *ofdev, int input);
60void rgmii_put_mdio(struct platform_device *ofdev, int input);
61void rgmii_set_speed(struct platform_device *ofdev, int input, int speed);
62int rgmii_get_regs_len(struct platform_device *ofdev);
63void *rgmii_dump_regs(struct platform_device *ofdev, void *buf);
64
65#else
66
67# define rgmii_init()		0
68# define rgmii_exit()		do { } while(0)
69# define rgmii_attach(x,y,z)	(-ENXIO)
70# define rgmii_detach(x,y)	do { } while(0)
71# define rgmii_get_mdio(o,i)	do { } while (0)
72# define rgmii_put_mdio(o,i)	do { } while (0)
73# define rgmii_set_speed(x,y,z)	do { } while(0)
74# define rgmii_get_regs_len(x)	0
75# define rgmii_dump_regs(x,buf)	(buf)
76#endif				/* !CONFIG_IBM_EMAC_RGMII */
77
78#endif /* __IBM_NEWEMAC_RGMII_H */
79