/*
* prototypes
*/
-static int rtctimer_open(snd_timer_t *t);
-static int rtctimer_close(snd_timer_t *t);
-static int rtctimer_start(snd_timer_t *t);
-static int rtctimer_stop(snd_timer_t *t);
+static int rtctimer_open(struct snd_timer *t);
+static int rtctimer_close(struct snd_timer *t);
+static int rtctimer_start(struct snd_timer *t);
+static int rtctimer_stop(struct snd_timer *t);
/*
* The hardware dependent description for this timer.
*/
-static struct _snd_timer_hardware rtc_hw = {
- .flags = SNDRV_TIMER_HW_FIRST|SNDRV_TIMER_HW_AUTO,
+static struct snd_timer_hardware rtc_hw = {
+ .flags = SNDRV_TIMER_HW_AUTO |
+ SNDRV_TIMER_HW_FIRST |
+ SNDRV_TIMER_HW_TASKLET,
.ticks = 100000000L, /* FIXME: XXX */
.open = rtctimer_open,
.close = rtctimer_close,
};
static int rtctimer_freq = RTC_FREQ; /* frequency */
-static snd_timer_t *rtctimer;
-static atomic_t rtc_inc = ATOMIC_INIT(0);
+static struct snd_timer *rtctimer;
+static struct tasklet_struct rtc_tasklet;
static rtc_task_t rtc_task;
static int
-rtctimer_open(snd_timer_t *t)
+rtctimer_open(struct snd_timer *t)
{
int err;
}
static int
-rtctimer_close(snd_timer_t *t)
+rtctimer_close(struct snd_timer *t)
{
rtc_task_t *rtc = t->private_data;
if (rtc) {
rtc_unregister(rtc);
+ tasklet_kill(&rtc_tasklet);
t->private_data = NULL;
}
return 0;
}
static int
-rtctimer_start(snd_timer_t *timer)
+rtctimer_start(struct snd_timer *timer)
{
rtc_task_t *rtc = timer->private_data;
snd_assert(rtc != NULL, return -EINVAL);
rtc_control(rtc, RTC_IRQP_SET, rtctimer_freq);
rtc_control(rtc, RTC_PIE_ON, 0);
- atomic_set(&rtc_inc, 0);
return 0;
}
static int
-rtctimer_stop(snd_timer_t *timer)
+rtctimer_stop(struct snd_timer *timer)
{
rtc_task_t *rtc = timer->private_data;
snd_assert(rtc != NULL, return -EINVAL);
return 0;
}
+static void rtctimer_tasklet(unsigned long data)
+{
+ snd_timer_interrupt((struct snd_timer *)data, 1);
+}
+
/*
* interrupt
*/
static void rtctimer_interrupt(void *private_data)
{
- int ticks;
-
- atomic_inc(&rtc_inc);
- ticks = atomic_read(&rtc_inc);
- snd_timer_interrupt((snd_timer_t*)private_data, ticks);
- atomic_sub(ticks, &rtc_inc);
+ tasklet_hi_schedule(private_data);
}
*/
static int __init rtctimer_init(void)
{
- int order, err;
- snd_timer_t *timer;
+ int err;
+ struct snd_timer *timer;
- if (rtctimer_freq < 2 || rtctimer_freq > 8192) {
- snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n", rtctimer_freq);
- return -EINVAL;
- }
- for (order = 1; rtctimer_freq > order; order <<= 1)
- ;
- if (rtctimer_freq != order) {
- snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n", rtctimer_freq);
+ if (rtctimer_freq < 2 || rtctimer_freq > 8192 ||
+ (rtctimer_freq & (rtctimer_freq - 1)) != 0) {
+ snd_printk(KERN_ERR "rtctimer: invalid frequency %d\n",
+ rtctimer_freq);
return -EINVAL;
}
if (err < 0)
return err;
+ timer->module = THIS_MODULE;
strcpy(timer->name, "RTC timer");
timer->hw = rtc_hw;
timer->hw.resolution = NANO_SEC / rtctimer_freq;
+ tasklet_init(&rtc_tasklet, rtctimer_tasklet, (unsigned long)timer);
+
/* set up RTC callback */
rtc_task.func = rtctimer_interrupt;
- rtc_task.private_data = timer;
+ rtc_task.private_data = &rtc_tasklet;
err = snd_timer_global_register(timer);
if (err < 0) {
MODULE_LICENSE("GPL");
+MODULE_ALIAS("snd-timer-" __stringify(SNDRV_TIMER_GLOBAL_RTC));
+
#endif /* CONFIG_RTC || CONFIG_RTC_MODULE */