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/***********************license start***************
* Author: Cavium Networks
*
* Contact: support@caviumnetworks.com
* This file is part of the OCTEON SDK
*
* Copyright (c) 2003-2008 Cavium Networks
*
* This file is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, Version 2, as
* published by the Free Software Foundation.
*
* This file is distributed in the hope that it will be useful, but
* AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
* NONINFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this file; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
* or visit http://www.gnu.org/licenses/.
*
* This file may also be available under a different license from Cavium.
* Contact Cavium Networks for more information
***********************license end**************************************/
/*
* Functions for SPI initialization, configuration,
* and monitoring.
*/
#ifndef __CVMX_HELPER_SPI_H__
#define __CVMX_HELPER_SPI_H__
/**
* Probe a SPI interface and determine the number of ports
* connected to it. The SPI interface should still be down after
* this call.
*
* @interface: Interface to probe
*
* Returns Number of ports on the interface. Zero to disable.
*/
extern int __cvmx_helper_spi_probe(int interface);
extern int __cvmx_helper_spi_enumerate(int interface);
/**
* Bringup and enable a SPI interface. After this call packet I/O
* should be fully functional. This is called with IPD enabled but
* PKO disabled.
*
* @interface: Interface to bring up
*
* Returns Zero on success, negative on failure
*/
extern int __cvmx_helper_spi_enable(int interface);
/**
* Return the link state of an IPD/PKO port as returned by
* auto negotiation. The result of this function may not match
* Octeon's link config if auto negotiation has changed since
* the last call to cvmx_helper_link_set().
*
* @ipd_port: IPD/PKO port to query
*
* Returns Link state
*/
extern union cvmx_helper_link_info __cvmx_helper_spi_link_get(int ipd_port);
/**
* Configure an IPD/PKO port for the specified link state. This
* function does not influence auto negotiation at the PHY level.
* The passed link state must always match the link state returned
* by cvmx_helper_link_get().
*
* @ipd_port: IPD/PKO port to configure
* @link_info: The new link state
*
* Returns Zero on success, negative on failure
*/
extern int __cvmx_helper_spi_link_set(int ipd_port,
union cvmx_helper_link_info link_info);
#endif
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