include/bsp/atsam-spi.h

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /*
0004  * Copyright (c) 2016 embedded brains GmbH & Co. KG
0005  *
0006  * Redistribution and use in source and binary forms, with or without
0007  * modification, are permitted provided that the following conditions
0008  * are met:
0009  * 1. Redistributions of source code must retain the above copyright
0010  *    notice, this list of conditions and the following disclaimer.
0011  * 2. Redistributions in binary form must reproduce the above copyright
0012  *    notice, this list of conditions and the following disclaimer in the
0013  *    documentation and/or other materials provided with the distribution.
0014  *
0015  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0016  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0017  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0018  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0019  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0020  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0021  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0022  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0023  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0024  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0025  * POSSIBILITY OF SUCH DAMAGE.
0026  */
0027
0028 #ifndef LIBBSP_ARM_ATSAM_ATSAM_SPI_H
0029 #define LIBBSP_ARM_ATSAM_ATSAM_SPI_H
0030
0031 #include <libchip/chip.h>
0032
0033 #ifdef __cplusplus
0034 extern "C" {
0035 #endif /* __cplusplus */
0036
0037 typedef struct {
0038   uint8_t     spi_peripheral_id;
0039   const Pin  *pins;
0040   Spi        *spi_regs;
0041   size_t      pin_count;
0042   bool        chip_select_decode;
0043
0044   /* Delay before SCLK in ns */
0045   uint32_t    dlybs_in_ns[4];
0046
0047   /* Delay before consecutive word transfers in ns */
0048   uint32_t    dlybct_in_ns[4];
0049 } atsam_spi_config;
0050
0051 int spi_bus_register_atsam(
0052   const char *bus_path,
0053   const atsam_spi_config *config
0054 );
0055
0056 #ifdef __cplusplus
0057 }
0058 #endif /* __cplusplus */
0059
0060 #endif /* LIBBSP_ARM_ATSAM_ATSAM_SPI_H */