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 30 #ifndef __PL022_SPI_H__ 31 #define __PL022_SPI_H__ 32 33 #include <gpio.h> 34 #include <spi.h> 35 36 #define PL022_REG_SIZE 0x1000 37 38 enum pl022_cs_control { 39 PL022_CS_CTRL_AUTO_GPIO, 40 PL022_CS_CTRL_CB, 41 PL022_CS_CTRL_MANUAL 42 }; 43 44 struct pl022_cs_gpio_data { 45 struct gpio_chip *chip; 46 unsigned int pin_num; 47 }; 48 49 union pl022_cs_data { 50 struct pl022_cs_gpio_data gpio_data; 51 void (*cs_cb)(enum gpio_level value); 52 }; 53 54 struct pl022_data { 55 union pl022_cs_data cs_data; 56 struct spi_chip chip; 57 vaddr_t base; 58 enum spi_mode mode; 59 enum pl022_cs_control cs_control; 60 unsigned int clk_hz; 61 unsigned int speed_hz; 62 unsigned int data_size_bits; 63 bool loopback; 64 }; 65 66 void pl022_init(struct pl022_data *pd); 67 68 #endif /* __PL022_SPI_H__ */ 69 70