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