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/*
* Timer Library (TLIB)
*
* COPYRIGHT (c) 2011.
* Cobham Gaisler AB.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <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;
}
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