1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2021 Adrian Chadd <adrian@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * 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 AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #ifndef __QCOM_SPI_REG_H__ 29 #define __QCOM_SPI_REG_H__ 30 31 #define SPI_CONFIG 0x0300 32 #define SPI_CONFIG_HS_MODE (1U << 10) 33 #define SPI_CONFIG_INPUT_FIRST (1U << 9) 34 #define SPI_CONFIG_LOOPBACK (1U << 8) 35 36 #define SPI_IO_CONTROL 0x0304 37 #define SPI_IO_C_FORCE_CS (1U << 11) 38 #define SPI_IO_C_CLK_IDLE_HIGH (1U << 10) 39 #define SPI_IO_C_MX_CS_MODE (1U << 8) 40 #define SPI_IO_C_CS_N_POLARITY_0 (1U << 4) 41 #define SPI_IO_C_CS_SELECT(x) (((x) & 3) << 2) 42 #define SPI_IO_C_CS_SELECT_MASK 0x000c 43 #define SPI_IO_C_TRISTATE_CS (1U << 1) 44 #define SPI_IO_C_NO_TRI_STATE (1U << 0) 45 46 #define SPI_ERROR_FLAGS 0x0308 47 #define SPI_ERROR_FLAGS_EN 0x030c 48 #define SPI_ERROR_CLK_OVER_RUN (1U << 1) 49 #define SPI_ERROR_CLK_UNDER_RUN (1U << 0) 50 51 /* 52 * Strictly this isn't true; some controllers have 53 * less CS lines exposed via GPIO/pinmux. 54 */ 55 #define SPI_NUM_CHIPSELECTS 4 56 57 /* 58 * The maximum single SPI transaction done in any mode. 59 * Ie, if you have a PIO/DMA transaction larger than 60 * this then it must be split up into SPI_MAX_XFER 61 * sub-transactions in the transfer loop. 62 */ 63 #define SPI_MAX_XFER (65536 - 64) 64 65 /* 66 * Any frequency at or above 26MHz is considered "high" 67 * and will have some different parameters configured. 68 */ 69 #define SPI_HS_MIN_RATE 26000000 70 71 #define SPI_MAX_RATE 50000000 72 73 #endif /* __QCOM_SPI_REG_H__ */ 74 75