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/drivers/staging/octeon/cvmx-helper-spi.h

https://bitbucket.org/cyanogenmod/android_kernel_asus_tf300t
C Header | 84 lines | 8 code | 6 blank | 70 comment | 0 complexity | 3af29aadeb7e2757e0f1f521c1d189fa MD5 | raw file
Possible License(s): LGPL-2.0, AGPL-1.0, GPL-2.0
 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 */
44extern int __cvmx_helper_spi_probe(int interface);
45
46/**
47 * Bringup and enable a SPI interface. After this call packet I/O
48 * should be fully functional. This is called with IPD enabled but
49 * PKO disabled.
50 *
51 * @interface: Interface to bring up
52 *
53 * Returns Zero on success, negative on failure
54 */
55extern int __cvmx_helper_spi_enable(int interface);
56
57/**
58 * Return the link state of an IPD/PKO port as returned by
59 * auto negotiation. The result of this function may not match
60 * Octeon's link config if auto negotiation has changed since
61 * the last call to cvmx_helper_link_set().
62 *
63 * @ipd_port: IPD/PKO port to query
64 *
65 * Returns Link state
66 */
67extern cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port);
68
69/**
70 * Configure an IPD/PKO port for the specified link state. This
71 * function does not influence auto negotiation at the PHY level.
72 * The passed link state must always match the link state returned
73 * by cvmx_helper_link_get(). It is normally best to use
74 * cvmx_helper_link_autoconf() instead.
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 */
81extern int __cvmx_helper_spi_link_set(int ipd_port,
82				      cvmx_helper_link_info_t link_info);
83
84#endif