diff options
Diffstat (limited to 'freebsd/sys/dev/iicbus/iicbus.h')
| -rw-r--r-- | freebsd/sys/dev/iicbus/iicbus.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/freebsd/sys/dev/iicbus/iicbus.h b/freebsd/sys/dev/iicbus/iicbus.h new file mode 100644 index 00000000..503305c7 --- /dev/null +++ b/freebsd/sys/dev/iicbus/iicbus.h @@ -0,0 +1,83 @@ +/*- + * SPDX-License-Identifier: BSD-2-Clause-FreeBSD + * + * Copyright (c) 1998 Nicolas Souchu + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + * + */ +#ifndef __IICBUS_H +#define __IICBUS_H + +#include <sys/_lock.h> +#include <sys/_mutex.h> + +#define IICBUS_IVAR(d) (struct iicbus_ivar *) device_get_ivars(d) +#define IICBUS_SOFTC(d) (struct iicbus_softc *) device_get_softc(d) + +struct iicbus_softc +{ + device_t dev; /* Myself */ + device_t owner; /* iicbus owner device structure */ + u_int owncount; /* iicbus ownership nesting count */ + u_char started; /* address of the 'started' slave + * 0 if no start condition succeeded */ + u_char strict; /* deny operations that violate the + * I2C protocol */ + struct mtx lock; + u_int bus_freq; /* Configured bus Hz. */ +}; + +struct iicbus_ivar +{ + uint32_t addr; + struct resource_list rl; + bool nostop; +}; + +enum { + IICBUS_IVAR_ADDR, /* Address or base address */ + IICBUS_IVAR_NOSTOP, /* nostop defaults */ +}; + +#define IICBUS_ACCESSOR(A, B, T) \ + __BUS_ACCESSOR(iicbus, A, IICBUS, B, T) + +IICBUS_ACCESSOR(addr, ADDR, uint32_t) +IICBUS_ACCESSOR(nostop, NOSTOP, bool) + +#define IICBUS_LOCK(sc) mtx_lock(&(sc)->lock) +#define IICBUS_UNLOCK(sc) mtx_unlock(&(sc)->lock) +#define IICBUS_ASSERT_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED) + +int iicbus_generic_intr(device_t dev, int event, char *buf); +void iicbus_init_frequency(device_t dev, u_int bus_freq); + +extern driver_t iicbus_driver; +extern devclass_t iicbus_devclass; +extern driver_t ofw_iicbus_driver; +extern devclass_t ofw_iicbus_devclass; + +#endif |