drivers/staging/media/av7110/av7110.c

Source file repositories/reference/linux-study-clean/drivers/staging/media/av7110/av7110.c

File Facts

System
Linux kernel
Corpus path
drivers/staging/media/av7110/av7110.c
Extension
.c
Size
80436 bytes
Lines
2887
Domain
Driver Families
Bucket
drivers/staging
Inferred role
Driver Families: operation-table or driver-model contract
Status
pattern 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

static const struct file_operations dvb_osd_fops = {
	.owner		= THIS_MODULE,
	.unlocked_ioctl	= dvb_generic_ioctl,
	.open		= dvb_generic_open,
	.release	= dvb_generic_release,
	.llseek		= noop_llseek,
};

static struct dvb_device dvbdev_osd = {
	.priv		= NULL,
	.users		= 1,
	.writers	= 1,
	.fops		= &dvb_osd_fops,
	.kernel_ioctl	= dvb_osd_ioctl,
};
#endif /* CONFIG_DVB_AV7110_OSD */

static inline int SetPIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
			  u16 subpid, u16 pcrpid)
{
	u16 aflags = 0;

	dprintk(4, "%p\n", av7110);

	if (vpid == 0x1fff || apid == 0x1fff ||
	    ttpid == 0x1fff || subpid == 0x1fff || pcrpid == 0x1fff) {
		vpid = 0;
		apid = 0;
		ttpid = 0;
		subpid = 0;
		pcrpid = 0;
		av7110->pids[DMX_PES_VIDEO] = 0;
		av7110->pids[DMX_PES_AUDIO] = 0;
		av7110->pids[DMX_PES_TELETEXT] = 0;
		av7110->pids[DMX_PES_PCR] = 0;
	}

	if (av7110->audiostate.bypass_mode)
		aflags |= 0x8000;

	return av7110_fw_cmd(av7110, COMTYPE_PIDFILTER,
			     AV7110_MULTI_PID, 6,
			     pcrpid, vpid, apid, ttpid, subpid, aflags);
}

int ChangePIDs(struct av7110 *av7110, u16 vpid, u16 apid, u16 ttpid,
	       u16 subpid, u16 pcrpid)
{
	int ret = 0;

	dprintk(4, "%p\n", av7110);

	if (mutex_lock_interruptible(&av7110->pid_mutex))
		return -ERESTARTSYS;

	if (!(vpid & 0x8000))
		av7110->pids[DMX_PES_VIDEO] = vpid;
	if (!(apid & 0x8000))
		av7110->pids[DMX_PES_AUDIO] = apid;
	if (!(ttpid & 0x8000))
		av7110->pids[DMX_PES_TELETEXT] = ttpid;
	if (!(pcrpid & 0x8000))
		av7110->pids[DMX_PES_PCR] = pcrpid;

	av7110->pids[DMX_PES_SUBTITLE] = 0;

	if (av7110->fe_synced) {
		pcrpid = av7110->pids[DMX_PES_PCR];
		ret = SetPIDs(av7110, vpid, apid, ttpid, subpid, pcrpid);
	}

	mutex_unlock(&av7110->pid_mutex);
	return ret;
}

/******************************************************************************
 * hardware filter functions
 ******************************************************************************/

static int StartHWFilter(struct dvb_demux_filter *dvbdmxfilter)
{
	struct dvb_demux_feed *dvbdmxfeed = dvbdmxfilter->feed;
	struct av7110 *av7110 = dvbdmxfeed->demux->priv;
	u16 buf[20];
	int ret, i;
	u16 handle;
	u16 mode = 0xb96a;

	dprintk(4, "%p\n", av7110);

Annotation

Implementation Notes