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