int omap_st_set_chgain(unsigned int id, int channel, s16 chgain)
{
struct omap_mcbsp *mcbsp;
struct omap_mcbsp_st_data *st_data;
int ret = 0;
if (!omap_mcbsp_check_valid_id(id)) {
printk(KERN_ERR "%s: Invalid id (%d)\n", __func__, id + 1);
return -ENODEV;
}
mcbsp = id_to_mcbsp_ptr(id);
st_data = mcbsp->st_data;
if (!st_data)
return -ENOENT;
spin_lock_irq(&mcbsp->lock);
if (channel == 0)
st_data->ch0gain = chgain;
else if (channel == 1)
st_data->ch1gain = chgain;
else
ret = -EINVAL;
if (st_data->enabled)
omap_st_chgain(mcbsp);
spin_unlock_irq(&mcbsp->lock);
return ret;
}
static int omap_st_start(struct omap_mcbsp *mcbsp)
{
struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
if (st_data->enabled && !st_data->running) {
omap_st_fir_write(mcbsp, st_data->taps);
omap_st_chgain(mcbsp);
if (!mcbsp->free) {
omap_st_on(mcbsp);
st_data->running = 1;
}
}
return 0;
}
int omap_st_set_chgain(struct omap_mcbsp *mcbsp, int channel, s16 chgain)
{
struct omap_mcbsp_st_data *st_data = mcbsp->st_data;
int ret = 0;
if (!st_data)
return -ENOENT;
spin_lock_irq(&mcbsp->lock);
if (channel == 0)
st_data->ch0gain = chgain;
else if (channel == 1)
st_data->ch1gain = chgain;
else
ret = -EINVAL;
if (st_data->enabled)
omap_st_chgain(mcbsp);
spin_unlock_irq(&mcbsp->lock);
return ret;
}