| /* SPDX-License-Identifier: GPL-2.0 */ |
| /* |
| * Copyright (C) 2020 Marvell International Ltd. |
| * |
| * Functions for SPI initialization, configuration, |
| * and monitoring. |
| */ |
| |
| #ifndef __CVMX_HELPER_SPI_H__ |
| #define __CVMX_HELPER_SPI_H__ |
| |
| #include "cvmx-helper.h" |
| |
| /** |
| * @INTERNAL |
| * Probe a SPI interface and determine the number of ports |
| * connected to it. The SPI interface should still be down after |
| * this call. |
| * |
| * @param interface Interface to probe |
| * |
| * Return: Number of ports on the interface. Zero to disable. |
| */ |
| int __cvmx_helper_spi_probe(int interface); |
| int __cvmx_helper_spi_enumerate(int interface); |
| |
| /** |
| * @INTERNAL |
| * 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. |
| * |
| * @param interface Interface to bring up |
| * |
| * Return: Zero on success, negative on failure |
| */ |
| int __cvmx_helper_spi_enable(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_spi_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_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info); |
| |
| /** |
| * Sets the spi timeout in config data |
| * @param timeout value |
| */ |
| void cvmx_spi_config_set_timeout(int timeout); |
| |
| #endif |