223cc6d1f4
Adds a driver for an FPGA fabric / CoreSPI implementation. Supports multiple instances, assuming they reside in some base address, offsettable by a constant value.
125 lines
3.3 KiB
C
125 lines
3.3 KiB
C
/****************************************************************************
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* boards/risc-v/mpfs/common/src/mpfs_board_spi.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdio.h>
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#include <debug.h>
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#include <errno.h>
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#include <nuttx/spi/spi.h>
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#include <nuttx/spi/spi_transfer.h>
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#include "mpfs_spi.h"
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#include "mpfs_corespi.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: board_spi_initialize
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*
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* Description:
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* Initialize and register SPI driver for the defined SPI ports.
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*
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****************************************************************************/
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int mpfs_board_spi_init(void)
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{
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int ret = OK;
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#if defined(CONFIG_MPFS_SPI0) || defined(CONFIG_MPFS_SPI1) || \
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defined(CONFIG_MPFS_CORESPI)
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struct spi_dev_s *spi;
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#ifdef CONFIG_SPI_DRIVER
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int port = 0;
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#endif /* CONFIG_SPI_DRIVER */
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#endif
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/* Initialize SPI device */
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#ifdef CONFIG_MPFS_SPI0
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spi = mpfs_spibus_initialize(0);
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if (spi == NULL)
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{
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spierr("Failed to initialize SPI0\n");
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return -ENODEV;
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}
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#ifdef CONFIG_SPI_DRIVER
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ret = spi_register(spi, port++);
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if (ret < 0)
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{
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syslog(LOG_ERR, "Failed to register /dev/spi0: %d\n", ret);
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mpfs_spibus_uninitialize(spi);
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}
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#endif /* CONFIG_SPI_DRIVER */
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#endif /* CONFIG_MPFS_SPI0 */
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#ifdef CONFIG_MPFS_SPI1
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spi = mpfs_spibus_initialize(1);
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if (spi == NULL)
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{
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spierr("Failed to initialize SPI1\n");
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return -ENODEV;
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}
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#ifdef CONFIG_SPI_DRIVER
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ret = spi_register(spi, port);
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if (ret < 0)
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{
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spierr("Failed to register /dev/spi%d: %d\n", port, ret);
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mpfs_spibus_uninitialize(spi);
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}
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#endif /* CONFIG_SPI_DRIVER */
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#endif /* CONFIG_MPFS_SPI1 */
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#ifdef CONFIG_MPFS_CORESPI
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/* REVISIT: Initialize all of them ? */
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spi = mpfs_corespibus_initialize(0);
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if (spi == NULL)
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{
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spierr("Failed to initialize SPI%d\n", 2);
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return -ENODEV;
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}
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#ifdef CONFIG_SPI_DRIVER
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ret = spi_register(spi, 2);
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if (ret < 0)
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{
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spierr("Failed to register /dev/spi%d: %d\n", 2, ret);
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mpfs_spibus_uninitialize(spi);
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}
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#endif /* CONFIG_SPI_DRIVER */
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#endif
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return ret;
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}
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