/*****************
* timer expires *
*****************/
void
dsp_tone_timeout(struct timer_list *t)
{
struct dsp *dsp = from_timer(dsp, t, tone.tl);
struct dsp_tone *tone = &dsp->tone;
struct pattern *pat = (struct pattern *)tone->pattern;
int index = tone->index;
if (!tone->tone)
return;
index++;
if (!pat->seq[index])
index = 0;
tone->index = index;
/* set next tone */
if (pat->data[index] == DATA_S)
dsp_tone_hw_message(dsp, NULL, 0);
else
dsp_tone_hw_message(dsp, pat->data[index], *(pat->siz[index]));
/* set timer */
tone->tl.expires = jiffies + (pat->seq[index] * HZ) / 8000;
add_timer(&tone->tl);
}
/*
* tones are relaized by streaming or by special loop commands if supported
* by hardware. when hardware is used, the patterns will be controlled by
* timers.
*/
int
dsp_tone(struct dsp *dsp, int tone)
{
struct pattern *pat;
int i;
struct dsp_tone *tonet = &dsp->tone;
tonet->software = 0;
tonet->hardware = 0;
/* we turn off the tone */
if (!tone) {
if (dsp->features.hfc_loops && timer_pending(&tonet->tl))
del_timer(&tonet->tl);
if (dsp->features.hfc_loops)
dsp_tone_hw_message(dsp, NULL, 0);
tonet->tone = 0;
return 0;
}
pat = NULL;
i = 0;
while (pattern[i].tone) {
if (pattern[i].tone == tone) {
pat = &pattern[i];
break;
}
i++;
}
if (!pat) {
printk(KERN_WARNING "dsp: given tone 0x%x is invalid\n", tone);
return -EINVAL;
}
if (dsp_debug & DEBUG_DSP_TONE)
printk(KERN_DEBUG "%s: now starting tone %d (index=%d)\n",
__func__, tone, 0);
tonet->tone = tone;
tonet->pattern = pat;
tonet->index = 0;
tonet->count = 0;
if (dsp->features.hfc_loops) {
tonet->hardware = 1;
/* set first tone */
dsp_tone_hw_message(dsp, pat->data[0], *(pat->siz[0]));
/* set timer */
if (timer_pending(&tonet->tl))
del_timer(&tonet->tl);
init_timer(&tonet->tl);
tonet->tl.expires = jiffies + (pat->seq[0] * HZ) / 8000;
add_timer(&tonet->tl);
} else {
tonet->software = 1;
}
return 0;
}
