drivers/media/dvb-frontends/bsbe1.h
Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/bsbe1.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/media/dvb-frontends/bsbe1.h- Extension
.h- Size
- 2606 bytes
- Lines
- 90
- 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.
- 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.
- Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
function alps_bsbe1_set_symbol_ratefunction alps_bsbe1_tuner_set_params
Annotated Snippet
else if (srate < 3000000) { aclk = 0xb7; bclk = 0x4b; }
else if (srate < 7000000) { aclk = 0xb7; bclk = 0x4f; }
else if (srate < 14000000) { aclk = 0xb7; bclk = 0x53; }
else if (srate < 30000000) { aclk = 0xb6; bclk = 0x53; }
else if (srate < 45000000) { aclk = 0xb4; bclk = 0x51; }
stv0299_writereg(fe, 0x13, aclk);
stv0299_writereg(fe, 0x14, bclk);
stv0299_writereg(fe, 0x1f, (ratio >> 16) & 0xff);
stv0299_writereg(fe, 0x20, (ratio >> 8) & 0xff);
stv0299_writereg(fe, 0x21, (ratio ) & 0xf0);
return 0;
}
static int alps_bsbe1_tuner_set_params(struct dvb_frontend *fe)
{
struct dtv_frontend_properties *p = &fe->dtv_property_cache;
int ret;
u8 data[4];
u32 div;
struct i2c_msg msg = { .addr = 0x61, .flags = 0, .buf = data, .len = sizeof(data) };
struct i2c_adapter *i2c = fe->tuner_priv;
if ((p->frequency < 950000) || (p->frequency > 2150000))
return -EINVAL;
div = p->frequency / 1000;
data[0] = (div >> 8) & 0x7f;
data[1] = div & 0xff;
data[2] = 0x80 | ((div & 0x18000) >> 10) | 0x1;
data[3] = 0xe0;
if (fe->ops.i2c_gate_ctrl)
fe->ops.i2c_gate_ctrl(fe, 1);
ret = i2c_transfer(i2c, &msg, 1);
return (ret != 1) ? -EIO : 0;
}
static struct stv0299_config alps_bsbe1_config = {
.demod_address = 0x68,
.inittab = alps_bsbe1_inittab,
.mclk = 88000000UL,
.invert = 1,
.skip_reinit = 0,
.min_delay_ms = 100,
.set_symbol_rate = alps_bsbe1_set_symbol_rate,
};
#endif
Annotation
- Detected declarations: `function alps_bsbe1_set_symbol_rate`, `function alps_bsbe1_tuner_set_params`.
- Atlas domain: Driver Families / drivers/media.
- Implementation status: source implementation candidate.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.