diff options
author | marcel <marcel@FreeBSD.org> | 2006-03-30 18:33:22 +0000 |
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committer | marcel <marcel@FreeBSD.org> | 2006-03-30 18:33:22 +0000 |
commit | 0215f8085c24d9281307a8a89dd8c19cbd285316 (patch) | |
tree | ff21d0075279ad6ded4c713484bf0d885479f663 /sys/kern/serdev_if.m | |
parent | 2801d7e75db117349d0c242e9d29ce4976370bbc (diff) | |
download | FreeBSD-src-0215f8085c24d9281307a8a89dd8c19cbd285316.zip FreeBSD-src-0215f8085c24d9281307a8a89dd8c19cbd285316.tar.gz |
Add scc(4), a driver for serial communications controllers. These
controllers typically have multiple channels and support a number
of serial communications protocols. The scc(4) driver is itself
an umbrella driver that delegates the control over each channel
and mode to a subordinate driver (like uart(4)).
The scc(4) driver supports the Siemens SAB 82532 and the Zilog
Z8530 and replaces puc(4) for these devices.
Diffstat (limited to 'sys/kern/serdev_if.m')
-rw-r--r-- | sys/kern/serdev_if.m | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/sys/kern/serdev_if.m b/sys/kern/serdev_if.m new file mode 100644 index 0000000..ce7f572 --- /dev/null +++ b/sys/kern/serdev_if.m @@ -0,0 +1,79 @@ +#- +# 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_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; + +# 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; + |