drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt.c

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt.c

File Facts

System: Linux kernel
Corpus path: drivers/media/dvb-frontends/cxd2880/cxd2880_tnrdmd_dvbt.c
Extension: .c
Size: 21562 bytes
Lines: 920
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

media/dvb_frontend.h
cxd2880_tnrdmd_dvbt.h
cxd2880_tnrdmd_dvbt_mon.h

Detected Declarations

function x_tune_dvbt_demod_setting
function x_sleep_dvbt_demod_setting
function dvbt_set_profile
function cxd2880_tnrdmd_dvbt_tune1
function cxd2880_tnrdmd_dvbt_tune2
function cxd2880_tnrdmd_dvbt_sleep_setting
function cxd2880_tnrdmd_dvbt_check_demod_lock
function cxd2880_tnrdmd_dvbt_check_ts_lock

Annotated Snippet

switch (clk_mode) {
		case CXD2880_TNRDMD_CLOCKMODE_A:
			data = maxclkcnt_a;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_B:
			data = maxclkcnt_b;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_C:
			data = maxclkcnt_c;
			break;
		default:
			return -EINVAL;
		}

		ret = tnr_dmd->io->write_regs(tnr_dmd->io,
					      CXD2880_IO_TGT_DMD,
					      0x68, data, 3);
		if (ret)
			return ret;
	}

	ret = tnr_dmd->io->write_reg(tnr_dmd->io,
				     CXD2880_IO_TGT_DMD,
				     0x00, 0x04);
	if (ret)
		return ret;

	switch (bandwidth) {
	case CXD2880_DTV_BW_8_MHZ:
		switch (clk_mode) {
		case CXD2880_TNRDMD_CLOCKMODE_A:
		case CXD2880_TNRDMD_CLOCKMODE_C:
			data = bw8_nomi_ac;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_B:
			data = bw8_nomi_b;
			break;
		default:
			return -EINVAL;
		}

		ret = tnr_dmd->io->write_regs(tnr_dmd->io,
					      CXD2880_IO_TGT_DMD,
					      0x60, data, 5);
		if (ret)
			return ret;

		ret = tnr_dmd->io->write_reg(tnr_dmd->io,
					     CXD2880_IO_TGT_DMD,
					     0x4a, 0x00);
		if (ret)
			return ret;

		switch (clk_mode) {
		case CXD2880_TNRDMD_CLOCKMODE_A:
			data = bw8_gtdofst_a;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_B:
			data = bw8_gtdofst_b;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_C:
			data = bw8_gtdofst_c;
			break;
		default:
			return -EINVAL;
		}

		ret = tnr_dmd->io->write_regs(tnr_dmd->io,
					      CXD2880_IO_TGT_DMD,
					      0x7d, data, 2);
		if (ret)
			return ret;

		switch (clk_mode) {
		case CXD2880_TNRDMD_CLOCKMODE_A:
		case CXD2880_TNRDMD_CLOCKMODE_B:
			sst_data = 0x35;
			break;
		case CXD2880_TNRDMD_CLOCKMODE_C:
			sst_data = 0x34;
			break;
		default:
			return -EINVAL;
		}

		ret = tnr_dmd->io->write_reg(tnr_dmd->io,
					     CXD2880_IO_TGT_DMD,
					     0x71, sst_data);
		if (ret)
			return ret;

Annotation

Immediate include surface: `media/dvb_frontend.h`, `cxd2880_tnrdmd_dvbt.h`, `cxd2880_tnrdmd_dvbt_mon.h`.
Detected declarations: `function x_tune_dvbt_demod_setting`, `function x_sleep_dvbt_demod_setting`, `function dvbt_set_profile`, `function cxd2880_tnrdmd_dvbt_tune1`, `function cxd2880_tnrdmd_dvbt_tune2`, `function cxd2880_tnrdmd_dvbt_sleep_setting`, `function cxd2880_tnrdmd_dvbt_check_demod_lock`, `function cxd2880_tnrdmd_dvbt_check_ts_lock`.
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.