mirror of
https://gitlab.rtems.org/rtems/rtos/rtems.git
synced 2026-08-25 17:56:12 +08:00
99 lines
2.6 KiB
C
99 lines
2.6 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
|
|
|
|
/*
|
|
* Timer Library (TLIB)
|
|
*
|
|
* COPYRIGHT (c) 2011.
|
|
* Cobham Gaisler AB.
|
|
*
|
|
* 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
|
|
*/
|
|
|
|
#include <rtems.h>
|
|
#include <grlib/tlib.h>
|
|
|
|
struct tlib_dev *tlib_dev_head = NULL;
|
|
struct tlib_dev *tlib_dev_tail = NULL;
|
|
static int tlib_dev_cnt = 0;
|
|
|
|
/* Register Timer device to Timer Library */
|
|
int tlib_dev_reg( struct tlib_dev *newdev )
|
|
{
|
|
/* Reset device */
|
|
newdev->status = 0;
|
|
newdev->isr_func = NULL;
|
|
newdev->index = tlib_dev_cnt;
|
|
|
|
/* Insert last in queue */
|
|
newdev->next = NULL;
|
|
if ( tlib_dev_tail == NULL ) {
|
|
tlib_dev_head = newdev;
|
|
} else {
|
|
tlib_dev_tail->next = newdev;
|
|
}
|
|
tlib_dev_tail = newdev;
|
|
|
|
/* Return Index of Registered Timer */
|
|
return tlib_dev_cnt++;
|
|
}
|
|
|
|
void *tlib_open( int timer_no )
|
|
{
|
|
struct tlib_dev *dev;
|
|
|
|
if ( timer_no < 0 ) {
|
|
return NULL;
|
|
}
|
|
|
|
dev = tlib_dev_head;
|
|
while ( ( timer_no > 0 ) && dev ) {
|
|
timer_no--;
|
|
dev = dev->next;
|
|
}
|
|
if ( dev ) {
|
|
if ( dev->status ) {
|
|
return NULL;
|
|
}
|
|
dev->status = 1;
|
|
/* Reset Timer to initial state */
|
|
tlib_reset( dev );
|
|
}
|
|
return dev;
|
|
}
|
|
|
|
void tlib_close( void *hand )
|
|
{
|
|
struct tlib_dev *dev = hand;
|
|
|
|
/* Stop any ongoing timer operation and unregister IRQ if registered */
|
|
tlib_stop( dev );
|
|
tlib_irq_unregister( dev );
|
|
|
|
/* Mark not open */
|
|
dev->status = 0;
|
|
}
|
|
|
|
int tlib_ntimer( void )
|
|
{
|
|
return tlib_dev_cnt;
|
|
}
|