1 /*- 2 * Copyright (c) 2006 M. Warner Losh 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 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d) 30 #define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d) 31 32 struct spibus_softc 33 { 34 device_t dev; 35 }; 36 37 #define SPIBUS_MODE_NONE 0 38 #define SPIBUS_MODE_CPHA 1 39 #define SPIBUS_MODE_CPOL 2 40 #define SPIBUS_MODE_CPOL_CPHA 3 41 42 struct spibus_ivar 43 { 44 uint32_t cs; 45 uint32_t mode; 46 uint32_t clock; 47 }; 48 49 #define SPIBUS_CS_HIGH (1U << 31) 50 51 enum { 52 SPIBUS_IVAR_CS, /* chip select that we're on */ 53 SPIBUS_IVAR_MODE, /* SPI mode (0-3) */ 54 SPIBUS_IVAR_CLOCK, /* maximum clock freq for device */ 55 }; 56 57 #define SPIBUS_ACCESSOR(A, B, T) \ 58 static inline int \ 59 spibus_get_ ## A(device_t dev, T *t) \ 60 { \ 61 return BUS_READ_IVAR(device_get_parent(dev), dev, \ 62 SPIBUS_IVAR_ ## B, (uintptr_t *) t); \ 63 } \ 64 static inline int \ 65 spibus_set_ ## A(device_t dev, T t) \ 66 { \ 67 return BUS_WRITE_IVAR(device_get_parent(dev), dev, \ 68 SPIBUS_IVAR_ ## B, (uintptr_t) t); \ 69 } 70 71 SPIBUS_ACCESSOR(cs, CS, uint32_t) 72 SPIBUS_ACCESSOR(mode, MODE, uint32_t) 73 SPIBUS_ACCESSOR(clock, CLOCK, uint32_t) 74 75 extern driver_t spibus_driver; 76 extern devclass_t spibus_devclass; 77 extern driver_t ofw_spibus_driver; 78 extern devclass_t ofw_spibus_devclass; 79