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https://github.com/AsahiLinux/u-boot
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74 lines
1.9 KiB
C
74 lines
1.9 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2020 Marvell International Ltd.
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*
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* Functions for SPI initialization, configuration,
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* and monitoring.
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*/
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#ifndef __CVMX_HELPER_SPI_H__
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#define __CVMX_HELPER_SPI_H__
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#include "cvmx-helper.h"
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/**
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* @INTERNAL
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* Probe a SPI interface and determine the number of ports
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* connected to it. The SPI interface should still be down after
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* this call.
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*
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* @param interface Interface to probe
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*
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* @return Number of ports on the interface. Zero to disable.
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*/
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int __cvmx_helper_spi_probe(int interface);
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int __cvmx_helper_spi_enumerate(int interface);
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/**
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* @INTERNAL
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* Bringup and enable a SPI interface. After this call packet I/O
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* should be fully functional. This is called with IPD enabled but
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* PKO disabled.
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*
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* @param interface Interface to bring up
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*
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* @return Zero on success, negative on failure
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*/
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int __cvmx_helper_spi_enable(int interface);
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/**
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* @INTERNAL
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* Return the link state of an IPD/PKO port as returned by
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* auto negotiation. The result of this function may not match
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* Octeon's link config if auto negotiation has changed since
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* the last call to cvmx_helper_link_set().
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*
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* @param ipd_port IPD/PKO port to query
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*
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* @return Link state
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*/
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cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port);
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/**
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* @INTERNAL
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* Configure an IPD/PKO port for the specified link state. This
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* function does not influence auto negotiation at the PHY level.
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* The passed link state must always match the link state returned
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* by cvmx_helper_link_get(). It is normally best to use
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* cvmx_helper_link_autoconf() instead.
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*
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* @param ipd_port IPD/PKO port to configure
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* @param link_info The new link state
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*
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* @return Zero on success, negative on failure
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*/
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int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info);
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/**
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* Sets the spi timeout in config data
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* @param timeout value
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*/
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void cvmx_spi_config_set_timeout(int timeout);
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#endif
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