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 */
23 struct 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 */
30 struct 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
51 int zmii_init(void);
52 void zmii_exit(void);
53 int zmii_attach(struct platform_device *ofdev, int input, int *mode);
54 void zmii_detach(struct platform_device *ofdev, int input);
55 void zmii_get_mdio(struct platform_device *ofdev, int input);
56 void zmii_put_mdio(struct platform_device *ofdev, int input);
57 void zmii_set_speed(struct platform_device *ofdev, int input, int speed);
58 int zmii_get_regs_len(struct platform_device *ocpdev);
59 void *zmii_dump_regs(struct platform_device *ofdev, void *buf);
60
61 #else
62 # define zmii_init() 0
63 # define zmii_exit() do { } while(0)
64 # define zmii_attach(x,y,z) (-ENXIO)
65 # define zmii_detach(x,y) do { } while(0)
66 # define zmii_get_mdio(x,y) do { } while(0)
67 # define zmii_put_mdio(x,y) do { } while(0)
68 # define zmii_set_speed(x,y,z) do { } while(0)
69 # define zmii_get_regs_len(x) 0
70 # define zmii_dump_regs(x,buf) (buf)
71 #endif /* !CONFIG_IBM_EMAC_ZMII */
72
73 #endif /* __IBM_NEWEMAC_ZMII_H */