sound/i2c/other/ak4114.c

Source file repositories/reference/linux-study-clean/sound/i2c/other/ak4114.c

File Facts

System
Linux kernel
Corpus path
sound/i2c/other/ak4114.c
Extension
.c
Size
18362 bytes
Lines
614
Domain
Driver Families
Bucket
sound/i2c
Inferred role
Driver Families: exported/initcall integration point
Status
integration implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

if (strstr(kctl->id.name, "Playback")) {
			if (ply_substream == NULL) {
				snd_ctl_free_one(kctl);
				ak4114->kctls[idx] = NULL;
				continue;
			}
			kctl->id.device = ply_substream->pcm->device;
			kctl->id.subdevice = ply_substream->number;
		} else {
			kctl->id.device = cap_substream->pcm->device;
			kctl->id.subdevice = cap_substream->number;
		}
		err = snd_ctl_add(ak4114->card, kctl);
		if (err < 0)
			return err;
		ak4114->kctls[idx] = kctl;
	}
	snd_ak4114_proc_init(ak4114);
	/* trigger workq */
	schedule_delayed_work(&ak4114->work, HZ / 10);
	return 0;
}
EXPORT_SYMBOL(snd_ak4114_build);

/* notify kcontrols if any parameters are changed */
static void ak4114_notify(struct ak4114 *ak4114,
			  unsigned char rcs0, unsigned char rcs1,
			  unsigned char c0, unsigned char c1)
{
	if (!ak4114->kctls[0])
		return;

	if (rcs0 & AK4114_PAR)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[0]->id);
	if (rcs0 & AK4114_V)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[1]->id);
	if (rcs1 & AK4114_CCRC)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[2]->id);
	if (rcs1 & AK4114_QCRC)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[3]->id);

	/* rate change */
	if (c1 & 0xf0)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[4]->id);

	if ((c0 & AK4114_PEM) | (c0 & AK4114_CINT))
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[9]->id);
	if (c0 & AK4114_QINT)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[10]->id);

	if (c0 & AK4114_AUDION)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[11]->id);
	if (c0 & AK4114_AUTO)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[12]->id);
	if (c0 & AK4114_DTSCD)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[13]->id);
	if (c0 & AK4114_UNLCK)
		snd_ctl_notify(ak4114->card, SNDRV_CTL_EVENT_MASK_VALUE,
			       &ak4114->kctls[14]->id);
}

int snd_ak4114_external_rate(struct ak4114 *ak4114)
{
	unsigned char rcs1;

	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
	return external_rate(rcs1);
}
EXPORT_SYMBOL(snd_ak4114_external_rate);

int snd_ak4114_check_rate_and_errors(struct ak4114 *ak4114, unsigned int flags)
{
	struct snd_pcm_runtime *runtime = ak4114->capture_substream ? ak4114->capture_substream->runtime : NULL;
	unsigned long _flags;
	int res = 0;
	unsigned char rcs0, rcs1;
	unsigned char c0, c1;

	rcs1 = reg_read(ak4114, AK4114_REG_RCS1);
	if (flags & AK4114_CHECK_NO_STAT)

Annotation

Implementation Notes