1 /*- 2 * Copyright (c) 2006 M. Warner Losh <imp@FreeBSD.org> 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 * 25 * $FreeBSD$ 26 */ 27 28 struct spi_command { 29 void *tx_cmd; 30 uint32_t tx_cmd_sz; 31 void *rx_cmd; 32 uint32_t rx_cmd_sz; 33 void *tx_data; 34 uint32_t tx_data_sz; 35 void *rx_data; 36 uint32_t rx_data_sz; 37 uint32_t flags; 38 }; 39 #define SPI_COMMAND_INITIALIZER { 0 } 40 41 #define SPI_FLAG_KEEP_CS 0x1 /* Keep chip select asserted */ 42 #define SPI_FLAG_NO_SLEEP 0x2 /* Prevent driver from sleeping (use polling) */ 43 44 #define SPI_CHIP_SELECT_HIGH 0x1 /* Chip select high (else low) */ 45 46 #ifdef FDT 47 #define SPIBUS_FDT_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, spibus) 48 #else 49 #define SPIBUS_FDT_PNP_INFO(t) 50 #endif 51