dsp_tone
struct dsp_tone tone;
extern int dsp_tone(struct dsp *dsp, int tone);
ret = dsp_tone(dsp, *((int *)data));
dsp_tone(dsp, 0);
struct dsp_tone *tone = &dsp->tone;
struct dsp_tone *tone = &dsp->tone;
struct dsp_tone *tonet = &dsp->tone;