drivers/media/dvb-frontends/stb6100_cfg.h

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/stb6100_cfg.h

File Facts

System
Linux kernel
Corpus path
drivers/media/dvb-frontends/stb6100_cfg.h
Extension
.h
Size
2132 bytes
Lines
88
Domain
Driver Families
Bucket
drivers/media
Inferred role
Driver Families: implementation source
Status
source 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 (err < 0) {
			printk("%s: Invalid parameter\n", __func__);
			return err;
		}
	}
	return 0;
}

static int stb6100_set_frequency(struct dvb_frontend *fe, u32 frequency)
{
	struct dvb_frontend_ops	*frontend_ops = &fe->ops;
	struct dvb_tuner_ops	*tuner_ops = &frontend_ops->tuner_ops;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 bw = c->bandwidth_hz;
	int err = 0;

	c->frequency = frequency;
	c->bandwidth_hz = 0;		/* Don't adjust the bandwidth */

	if (tuner_ops->set_params) {
		err = tuner_ops->set_params(fe);
		c->bandwidth_hz = bw;
		if (err < 0) {
			printk("%s: Invalid parameter\n", __func__);
			return err;
		}
	}
	return 0;
}

static int stb6100_get_bandwidth(struct dvb_frontend *fe, u32 *bandwidth)
{
	struct dvb_frontend_ops	*frontend_ops = &fe->ops;
	struct dvb_tuner_ops	*tuner_ops = &frontend_ops->tuner_ops;
	int err = 0;

	if (tuner_ops->get_bandwidth) {
		err = tuner_ops->get_bandwidth(fe, bandwidth);
		if (err < 0) {
			printk("%s: Invalid parameter\n", __func__);
			return err;
		}
	}
	return 0;
}

static int stb6100_set_bandwidth(struct dvb_frontend *fe, u32 bandwidth)
{
	struct dvb_frontend_ops	*frontend_ops = &fe->ops;
	struct dvb_tuner_ops	*tuner_ops = &frontend_ops->tuner_ops;
	struct dtv_frontend_properties *c = &fe->dtv_property_cache;
	u32 freq = c->frequency;
	int err = 0;

	c->bandwidth_hz = bandwidth;
	c->frequency = 0;		/* Don't adjust the frequency */

	if (tuner_ops->set_params) {
		err = tuner_ops->set_params(fe);
		c->frequency = freq;
		if (err < 0) {
			printk("%s: Invalid parameter\n", __func__);
			return err;
		}
	}
	return 0;
}

Annotation

Implementation Notes