1 /***********************license start***************
2  * Author: Cavium Networks
3  *
4  * Contact: support@caviumnetworks.com
5  * This file is part of the OCTEON SDK
6  *
7  * Copyright (c) 2003-2008 Cavium Networks
8  *
9  * This file is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License, Version 2, as
11  * published by the Free Software Foundation.
12  *
13  * This file is distributed in the hope that it will be useful, but
14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16  * NONINFRINGEMENT.  See the GNU General Public License for more
17  * details.
18  *
19  * You should have received a copy of the GNU General Public License
20  * along with this file; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22  * or visit http://www.gnu.org/licenses/.
23  *
24  * This file may also be available under a different license from Cavium.
25  * Contact Cavium Networks for more information
26  ***********************license end**************************************/
27 
28 /*
29  * Functions for SPI initialization, configuration,
30  * and monitoring.
31  */
32 #ifndef __CVMX_HELPER_SPI_H__
33 #define __CVMX_HELPER_SPI_H__
34 
35 /**
36  * Probe a SPI interface and determine the number of ports
37  * connected to it. The SPI interface should still be down after
38  * this call.
39  *
40  * @interface: Interface to probe
41  *
42  * Returns Number of ports on the interface. Zero to disable.
43  */
44 extern int __cvmx_helper_spi_probe(int interface);
45 extern int __cvmx_helper_spi_enumerate(int interface);
46 
47 /**
48  * Bringup and enable a SPI interface. After this call packet I/O
49  * should be fully functional. This is called with IPD enabled but
50  * PKO disabled.
51  *
52  * @interface: Interface to bring up
53  *
54  * Returns Zero on success, negative on failure
55  */
56 extern int __cvmx_helper_spi_enable(int interface);
57 
58 /**
59  * Return the link state of an IPD/PKO port as returned by
60  * auto negotiation. The result of this function may not match
61  * Octeon's link config if auto negotiation has changed since
62  * the last call to cvmx_helper_link_set().
63  *
64  * @ipd_port: IPD/PKO port to query
65  *
66  * Returns Link state
67  */
68 extern union cvmx_helper_link_info __cvmx_helper_spi_link_get(int ipd_port);
69 
70 /**
71  * Configure an IPD/PKO port for the specified link state. This
72  * function does not influence auto negotiation at the PHY level.
73  * The passed link state must always match the link state returned
74  * by cvmx_helper_link_get().
75  *
76  * @ipd_port:  IPD/PKO port to configure
77  * @link_info: The new link state
78  *
79  * Returns Zero on success, negative on failure
80  */
81 extern int __cvmx_helper_spi_link_set(int ipd_port,
82 				      union cvmx_helper_link_info link_info);
83 
84 #endif
85