1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2016, Linaro Limited 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions are met: 8 * 9 * 1. Redistributions of source code must retain the above copyright notice, 10 * this list of conditions and the following disclaimer. 11 * 12 * 2. Redistributions in binary form must reproduce the above copyright notice, 13 * this list of conditions and the following disclaimer in the documentation 14 * and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef __SPI_H__ 30 #define __SPI_H__ 31 32 #include <types_ext.h> 33 34 enum spi_mode { 35 SPI_MODE0, 36 SPI_MODE1, 37 SPI_MODE2, 38 SPI_MODE3 39 }; 40 41 enum spi_result { 42 SPI_OK, 43 SPI_ERR_CFG, 44 SPI_ERR_PKTCNT, 45 SPI_ERR_GENERIC 46 }; 47 48 struct spi_chip { 49 const struct spi_ops *ops; 50 }; 51 52 struct spi_ops { 53 void (*configure)(struct spi_chip *chip); 54 void (*start)(struct spi_chip *chip); 55 enum spi_result (*txrx8)(struct spi_chip *chip, uint8_t *wdat, 56 uint8_t *rdat, size_t num_pkts); 57 enum spi_result (*txrx16)(struct spi_chip *chip, uint16_t *wdat, 58 uint16_t *rdat, size_t num_pkts); 59 void (*end)(struct spi_chip *chip); 60 }; 61 62 #endif /* __SPI_H__ */ 63 64