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104 lines
3.6 KiB
C
104 lines
3.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause
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*
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* Copyright (c) 1998 Nicolas Souchu
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#ifndef __IICBUS_H
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#define __IICBUS_H
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#include <sys/_lock.h>
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#include <sys/_mutex.h>
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#define IICBUS_IVAR(d) (struct iicbus_ivar *) device_get_ivars(d)
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#define IICBUS_SOFTC(d) (struct iicbus_softc *) device_get_softc(d)
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struct iicbus_softc
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{
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device_t dev; /* Myself */
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device_t owner; /* iicbus owner device structure */
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device_t busydev; /* iicbus_release_bus calls unbusy on this */
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u_int owncount; /* iicbus ownership nesting count */
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u_char started; /* address of the 'started' slave
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* 0 if no start condition succeeded */
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u_char strict; /* deny operations that violate the
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* I2C protocol */
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struct mtx lock;
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u_int bus_freq; /* Configured bus Hz. */
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};
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struct iicbus_ivar
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{
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uint32_t addr;
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struct resource_list rl;
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};
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/* Value of 0x100 is reserved for ACPI_IVAR_HANDLE used by acpi_iicbus */
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enum {
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IICBUS_IVAR_ADDR /* Address or base address */
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};
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#define IICBUS_ACCESSOR(A, B, T) \
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__BUS_ACCESSOR(iicbus, A, IICBUS, B, T)
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IICBUS_ACCESSOR(addr, ADDR, uint32_t)
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#define IICBUS_LOCK(sc) mtx_lock(&(sc)->lock)
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#define IICBUS_UNLOCK(sc) mtx_unlock(&(sc)->lock)
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#define IICBUS_ASSERT_LOCKED(sc) mtx_assert(&(sc)->lock, MA_OWNED)
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#ifdef FDT
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#define IICBUS_FDT_PNP_INFO(t) FDTCOMPAT_PNP_INFO(t, iicbus)
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#else
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#define IICBUS_FDT_PNP_INFO(t)
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#endif
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#ifdef DEV_ACPI
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#define IICBUS_ACPI_PNP_INFO(t) ACPICOMPAT_PNP_INFO(t, iicbus)
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#else
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#define IICBUS_ACPI_PNP_INFO(t)
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#endif
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int iicbus_generic_intr(device_t dev, int event, char *buf);
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void iicbus_init_frequency(device_t dev, u_int bus_freq);
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int iicbus_attach_common(device_t dev, u_int bus_freq);
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device_t iicbus_add_child_common(device_t dev, u_int order, const char *name,
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int unit, size_t ivars_size);
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int iicbus_detach(device_t dev);
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void iicbus_probe_nomatch(device_t bus, device_t child);
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int iicbus_read_ivar(device_t bus, device_t child, int which,
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uintptr_t *result);
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int iicbus_write_ivar(device_t bus, device_t child, int which,
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uintptr_t value);
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int iicbus_child_location(device_t bus, device_t child, struct sbuf *sb);
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int iicbus_child_pnpinfo(device_t bus, device_t child, struct sbuf *sb);
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extern driver_t iicbus_driver;
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extern driver_t ofw_iicbus_driver;
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extern driver_t acpi_iicbus_driver;
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#endif
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