1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2020 Marvell International Ltd.
4  *
5  * Functions for AGL (RGMII) initialization, configuration,
6  * and monitoring.
7  */
8 
9 #ifndef __CVMX_HELPER_AGL_H__
10 #define __CVMX_HELPER_AGL_H__
11 
12 int __cvmx_helper_agl_enumerate(int interface);
13 
14 int cvmx_helper_agl_get_port(int xiface);
15 
16 /**
17  * @INTERNAL
18  * Probe a RGMII interface and determine the number of ports
19  * connected to it. The RGMII interface should still be down
20  * after this call.
21  *
22  * @param interface Interface to probe
23  *
24  * @return Number of ports on the interface. Zero to disable.
25  */
26 int __cvmx_helper_agl_probe(int interface);
27 
28 /**
29  * @INTERNAL
30  * Bringup and enable a RGMII interface. After this call packet
31  * I/O should be fully functional. This is called with IPD
32  * enabled but PKO disabled.
33  *
34  * @param interface Interface to bring up
35  *
36  * @return Zero on success, negative on failure
37  */
38 int __cvmx_helper_agl_enable(int interface);
39 
40 /**
41  * @INTERNAL
42  * Return the link state of an IPD/PKO port as returned by
43  * auto negotiation. The result of this function may not match
44  * Octeon's link config if auto negotiation has changed since
45  * the last call to cvmx_helper_link_set().
46  *
47  * @param ipd_port IPD/PKO port to query
48  *
49  * @return Link state
50  */
51 cvmx_helper_link_info_t __cvmx_helper_agl_link_get(int ipd_port);
52 
53 /**
54  * @INTERNAL
55  * Configure an IPD/PKO port for the specified link state. This
56  * function does not influence auto negotiation at the PHY level.
57  * The passed link state must always match the link state returned
58  * by cvmx_helper_link_get(). It is normally best to use
59  * cvmx_helper_link_autoconf() instead.
60  *
61  * @param ipd_port  IPD/PKO port to configure
62  * @param link_info The new link state
63  *
64  * @return Zero on success, negative on failure
65  */
66 int __cvmx_helper_agl_link_set(int ipd_port, cvmx_helper_link_info_t link_info);
67 
68 #endif /* __CVMX_HELPER_AGL_H__ */
69