2 * Copyright (c) 1998 Nicolas Souchu
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
32 #include <sys/_lock.h>
33 #include <sys/_mutex.h>
35 #define IICBUS_IVAR(d) (struct iicbus_ivar *) device_get_ivars(d)
36 #define IICBUS_SOFTC(d) (struct iicbus_softc *) device_get_softc(d)
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 u_char strict; /* deny operations that violate the
47 u_int bus_freq; /* Configured bus Hz. */
53 struct resource_list rl;
58 IICBUS_IVAR_ADDR, /* Address or base address */
59 IICBUS_IVAR_NOSTOP, /* nostop defaults */
62 #define IICBUS_ACCESSOR(A, B, T) \
63 __BUS_ACCESSOR(iicbus, A, IICBUS, B, T)
65 IICBUS_ACCESSOR(addr, ADDR, uint32_t)
66 IICBUS_ACCESSOR(nostop, NOSTOP, bool)
68 #define IICBUS_LOCK(sc) mtx_lock(&(sc)->lock)
69 #define IICBUS_UNLOCK(sc) mtx_unlock(&(sc)->lock)
70 #define IICBUS_ASSERT_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED)
72 int iicbus_generic_intr(device_t dev, int event, char *buf);
73 void iicbus_init_frequency(device_t dev, u_int bus_freq);
75 extern driver_t iicbus_driver;
76 extern devclass_t iicbus_devclass;