C++ (Cpp) AC97_EVNT Examples

Example #1

static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
				unsigned short val)
{
	
	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
	unsigned int tmo, retry;

	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
	au_sync();

	retry = AC97_RW_RETRIES;
	do {
		mutex_lock(&pscdata->lock);

		au_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff),
			  AC97_CDC(pscdata));
		au_sync();

		tmo = 2000;
		while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD))
		       && --tmo)
			udelay(2);

		au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
		au_sync();

		mutex_unlock(&pscdata->lock);
	} while (--retry && !tmo);
}

Example #2

static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
					unsigned short reg)
{
	
	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
	unsigned short data, retry, tmo;

	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
	au_sync();

	retry = AC97_RW_RETRIES;
	do {
		mutex_lock(&pscdata->lock);

		au_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg),
			  AC97_CDC(pscdata));
		au_sync();

		tmo = 2000;
		while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD))
			&& --tmo)
			udelay(2);

		data = au_readl(AC97_CDC(pscdata)) & 0xffff;

		au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
		au_sync();

		mutex_unlock(&pscdata->lock);
	} while (--retry && !tmo);

	return retry ? data : 0xffff;
}

Example #3

File: psc-ac97.c Project: AppEngine/linux-2.6

/* AC97 controller writes to codec register */
static void au1xpsc_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
				unsigned short val)
{
	/* FIXME */
	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
	unsigned int tmo;

	au_writel(PSC_AC97CDC_INDX(reg) | (val & 0xffff), AC97_CDC(pscdata));
	au_sync();
	tmo = 1000;
	while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
		au_sync();

	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
	au_sync();
}

Example #4

File: psc-ac97.c Project: AppEngine/linux-2.6

/* AC97 controller reads codec register */
static unsigned short au1xpsc_ac97_read(struct snd_ac97 *ac97,
					unsigned short reg)
{
	/* FIXME */
	struct au1xpsc_audio_data *pscdata = au1xpsc_ac97_workdata;
	unsigned short data, tmo;

	au_writel(PSC_AC97CDC_RD | PSC_AC97CDC_INDX(reg), AC97_CDC(pscdata));
	au_sync();

	tmo = 1000;
	while ((!(au_readl(AC97_EVNT(pscdata)) & PSC_AC97EVNT_CD)) && --tmo)
		udelay(2);

	if (!tmo)
		data = 0xffff;
	else
		data = au_readl(AC97_CDC(pscdata)) & 0xffff;

	au_writel(PSC_AC97EVNT_CD, AC97_EVNT(pscdata));
	au_sync();

	return data;
}