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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2020 Marvell International Ltd.
*
* Functions for XAUI initialization, configuration,
* and monitoring.
*/
#ifndef __CVMX_HELPER_XAUI_H__
#define __CVMX_HELPER_XAUI_H__
/**
* @INTERNAL
* Probe a XAUI interface and determine the number of ports
* connected to it. The XAUI interface should still be down
* after this call.
*
* @param xiface Interface to probe
*
* @return Number of ports on the interface. Zero to disable.
*/
int __cvmx_helper_xaui_probe(int xiface);
int __cvmx_helper_xaui_enumerate(int xiface);
/**
* @INTERNAL
* Bringup and enable a XAUI interface. After this call packet
* I/O should be fully functional. This is called with IPD
* enabled but PKO disabled.
*
* @param xiface Interface to bring up
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_xaui_enable(int xiface);
/**
* Retrain XAUI interface.
*
* GMX is disabled as part of retraining.
* While GMX is disabled, new received packets are dropped.
* If GMX was in the middle of recieving a packet when disabled,
* that packet will be received before GMX idles.
* Transmitted packets are buffered normally, but not sent.
* If GMX was in the middle of transmitting a packet when disabled,
* that packet will be transmitted before GMX idles.
*
* @param interface Interface to retrain
*
* @return Zero on success, negative on failure
*/
int cvmx_helper_xaui_link_retrain(int interface);
/**
* Reinitialize XAUI interface. Does a probe without changing the hardware
* state.
*
* @param interface Interface to reinitialize
*
* @return 0 on success, negative on failure
*/
int cvmx_helper_xaui_link_reinit(int interface);
/**
* @INTERNAL
* 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().
*
* @param ipd_port IPD/PKO port to query
*
* @return Link state
*/
cvmx_helper_link_info_t __cvmx_helper_xaui_link_get(int ipd_port);
/**
* @INTERNAL
* 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(). It is normally best to use
* cvmx_helper_link_autoconf() instead.
*
* @param ipd_port IPD/PKO port to configure
* @param link_info The new link state
*
* @return Zero on success, negative on failure
*/
int __cvmx_helper_xaui_link_set(int ipd_port, cvmx_helper_link_info_t link_info);
/**
* @INTERNAL
* Configure a port for internal and/or external loopback. Internal loopback
* causes packets sent by the port to be received by Octeon. External loopback
* causes packets received from the wire to sent out again.
*
* @param ipd_port IPD/PKO port to loopback.
* @param enable_internal
* Non zero if you want internal loopback
* @param enable_external
* Non zero if you want external loopback
*
* @return Zero on success, negative on failure.
*/
int __cvmx_helper_xaui_configure_loopback(int ipd_port, int enable_internal, int enable_external);
#endif
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