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 26 #define SPIBUS_IVAR(d) (struct spibus_ivar *) device_get_ivars(d) 27 #define SPIBUS_SOFTC(d) (struct spibus_softc *) device_get_softc(d) 28 29 struct spibus_softc 30 { 31 device_t dev; 32 }; 33 34 #define SPIBUS_MODE_NONE 0 35 #define SPIBUS_MODE_CPHA 1 36 #define SPIBUS_MODE_CPOL 2 37 #define SPIBUS_MODE_CPOL_CPHA 3 38 39 struct spibus_ivar 40 { 41 uint32_t cs; 42 uint32_t mode; 43 uint32_t clock; 44 uint32_t cs_delay; 45 struct resource_list rl; 46 }; 47 48 #define SPIBUS_CS_HIGH (1U << 31) 49 50 enum { 51 SPIBUS_IVAR_CS, /* chip select that we're on */ 52 SPIBUS_IVAR_MODE, /* SPI mode (0-3) */ 53 SPIBUS_IVAR_CLOCK, /* maximum clock freq for device */ 54 SPIBUS_IVAR_CS_DELAY, /* delay in microseconds after toggling chip select */ 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 SPIBUS_ACCESSOR(cs_delay, CS_DELAY, uint32_t) 75 76 extern driver_t spibus_driver; 77 extern driver_t ofw_spibus_driver; 78 79 int spibus_attach(device_t); 80 int spibus_detach(device_t); 81 device_t spibus_add_child_common(device_t, u_int, const char *, int, size_t); 82 void spibus_probe_nomatch(device_t, device_t); 83 int spibus_child_location(device_t, device_t, struct sbuf *); 84 int spibus_read_ivar(device_t, device_t, int, uintptr_t *); 85 int spibus_write_ivar(device_t, device_t, int, uintptr_t); 86