mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
95 lines
3.5 KiB
Objective-C
95 lines
3.5 KiB
Objective-C
#-
|
|
# Copyright (c) 2006 Marcel Moolenaar
|
|
# 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.
|
|
#
|
|
# $FreeBSD$
|
|
#
|
|
|
|
#include <sys/bus.h>
|
|
#include <sys/serial.h>
|
|
|
|
# The serdev interface is used by umbrella drivers and children thereof to
|
|
# establish a more intimate relationship, necessary for efficient handling
|
|
# of multiple (concurrent) serial communication channels. Examples include
|
|
# serial communications controller (SCC) drivers, multi-I/O adapter drivers
|
|
# and intelligent multi-port serial drivers. Methods specifically deal
|
|
# with interrupt handling and configuration. Conceptually, the umbrella
|
|
# driver is responsible for the overall operation of the hardware and uses
|
|
# child drivers to handle each individual channel.
|
|
# The serdev interface is intended to inherit the device interface.
|
|
|
|
INTERFACE serdev;
|
|
|
|
# Default implementations of some methods.
|
|
CODE {
|
|
static serdev_intr_t *
|
|
default_ihand(device_t dev, int ipend)
|
|
{
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
default_ipend(device_t dev)
|
|
{
|
|
return (-1);
|
|
}
|
|
|
|
static int
|
|
default_sysdev(device_t dev)
|
|
{
|
|
return (0);
|
|
}
|
|
};
|
|
|
|
# ihand() - Query serial device interrupt handler.
|
|
# This method is called by the umbrella driver to obtain function pointers
|
|
# to interrupt handlers for each individual interrupt source. This allows
|
|
# the umbralla driver to control the servicing of interrupts between the
|
|
# different channels in the most flexible way.
|
|
METHOD serdev_intr_t* ihand {
|
|
device_t dev;
|
|
int ipend;
|
|
} DEFAULT default_ihand;
|
|
|
|
# ipend() - Query pending interrupt status.
|
|
# This method is called by the umbrella driver to obtain interrupt status
|
|
# for the UART in question. This allows the umbrella driver to build a
|
|
# matrix and service the interrupts in the most flexible way by calling
|
|
# interrupt handlers collected with the ihand() method.
|
|
METHOD int ipend {
|
|
device_t dev;
|
|
} DEFAULT default_ipend;
|
|
|
|
# sysdev() - Query system device status
|
|
# This method may be called by the umbrella driver for each child driver
|
|
# to establish if a particular channel and mode is currently being used
|
|
# for system specific usage. If this is the case, the hardware is not
|
|
# reset and the channel will not change its operation mode.
|
|
# The return value is !0 if the channel and mode are used for a system
|
|
# device and 0 otherwise.
|
|
METHOD int sysdev {
|
|
device_t dev;
|
|
} DEFAULT default_sysdev;
|
|
|