iicbus.h revision 181304
1/*- 2 * Copyright (c) 1998 Nicolas Souchu 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: head/sys/dev/iicbus/iicbus.h 181304 2008-08-04 21:03:06Z jhb $ 27 * 28 */ 29#ifndef __IICBUS_H 30#define __IICBUS_H 31 32#include <sys/_lock.h> 33#include <sys/_mutex.h> 34 35#define IICBUS_IVAR(d) (struct iicbus_ivar *) device_get_ivars(d) 36#define IICBUS_SOFTC(d) (struct iicbus_softc *) device_get_softc(d) 37 38struct iicbus_softc 39{ 40 device_t dev; /* Myself */ 41 device_t owner; /* iicbus owner device structure */ 42 u_char started; /* address of the 'started' slave 43 * 0 if no start condition succeeded */ 44 struct mtx lock; 45}; 46 47struct iicbus_ivar 48{ 49 uint32_t addr; 50}; 51 52enum { 53 IICBUS_IVAR_ADDR /* Address or base address */ 54}; 55 56#define IICBUS_ACCESSOR(A, B, T) \ 57 __BUS_ACCESSOR(iicbus, A, IICBUS, B, T) 58 59IICBUS_ACCESSOR(addr, ADDR, uint32_t) 60 61#define IICBUS_LOCK(sc) mtx_lock(&(sc)->lock) 62#define IICBUS_UNLOCK(sc) mtx_unlock(&(sc)->lock) 63#define IICBUS_ASSERT_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED) 64 65extern int iicbus_generic_intr(device_t dev, int event, char *buf); 66 67extern driver_t iicbus_driver; 68extern devclass_t iicbus_devclass; 69 70#endif 71