forked from Imagelibrary/rtems
5d5b9eeb08
This patch changes the license to BSD-2 for all source files where the copyright is held by Aeroflex Gaisler, Cobham Gaisler, or Gaisler Research. Some files also includes copyright right statements from OAR and/or embedded Brains in addition to Gaisler. Updates #3053.
97 lines
2.6 KiB
C
97 lines
2.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/*
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* Timer Library (TLIB)
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*
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* COPYRIGHT (c) 2011.
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* Cobham Gaisler AB.
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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 COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <rtems.h>
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#include <grlib/tlib.h>
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struct tlib_dev *tlib_dev_head = NULL;
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struct tlib_dev *tlib_dev_tail = NULL;
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static int tlib_dev_cnt = 0;
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/* Register Timer device to Timer Library */
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int tlib_dev_reg(struct tlib_dev *newdev)
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{
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/* Reset device */
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newdev->status = 0;
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newdev->isr_func = NULL;
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newdev->index = tlib_dev_cnt;
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/* Insert last in queue */
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newdev->next = NULL;
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if ( tlib_dev_tail == NULL ) {
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tlib_dev_head = newdev;
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} else {
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tlib_dev_tail->next = newdev;
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}
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tlib_dev_tail = newdev;
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/* Return Index of Registered Timer */
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return tlib_dev_cnt++;
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}
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void *tlib_open(int timer_no)
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{
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struct tlib_dev *dev;
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if ( timer_no < 0 )
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return NULL;
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dev = tlib_dev_head;
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while ( (timer_no > 0) && dev ) {
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timer_no--;
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dev = dev->next;
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}
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if ( dev ) {
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if ( dev->status )
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return NULL;
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dev->status = 1;
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/* Reset Timer to initial state */
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tlib_reset(dev);
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}
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return dev;
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}
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void tlib_close(void *hand)
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{
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struct tlib_dev *dev = hand;
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/* Stop any ongoing timer operation and unregister IRQ if registered */
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tlib_stop(dev);
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tlib_irq_unregister(dev);
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/* Mark not open */
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dev->status = 0;
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}
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int tlib_ntimer(void)
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{
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return tlib_dev_cnt;
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}
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