drivers/media/tuners/tda18271.h
Source file repositories/reference/linux-study-clean/drivers/media/tuners/tda18271.h
File Facts
- System
- Linux kernel
- Corpus path
drivers/media/tuners/tda18271.h- Extension
.h- Size
- 3160 bytes
- Lines
- 128
- 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
linux/i2c.hmedia/dvb_frontend.h
Detected Declarations
struct tda18271_std_map_itemstruct tda18271_std_mapstruct tda18271_configenum tda18271_roleenum tda18271_i2c_gateenum tda18271_output_optionsenum tda18271_small_i2cenum tda18271_mode
Annotated Snippet
struct tda18271_std_map_item {
u16 if_freq;
/* EP3[4:3] */
unsigned int agc_mode:2;
/* EP3[2:0] */
unsigned int std:3;
/* EP4[7] */
unsigned int fm_rfn:1;
/* EP4[4:2] */
unsigned int if_lvl:3;
/* EB22[6:0] */
unsigned int rfagc_top:7;
};
struct tda18271_std_map {
struct tda18271_std_map_item fm_radio;
struct tda18271_std_map_item atv_b;
struct tda18271_std_map_item atv_dk;
struct tda18271_std_map_item atv_gh;
struct tda18271_std_map_item atv_i;
struct tda18271_std_map_item atv_l;
struct tda18271_std_map_item atv_lc;
struct tda18271_std_map_item atv_mn;
struct tda18271_std_map_item atsc_6;
struct tda18271_std_map_item dvbt_6;
struct tda18271_std_map_item dvbt_7;
struct tda18271_std_map_item dvbt_8;
struct tda18271_std_map_item qam_6;
struct tda18271_std_map_item qam_7;
struct tda18271_std_map_item qam_8;
};
enum tda18271_role {
TDA18271_MASTER = 0,
TDA18271_SLAVE,
};
enum tda18271_i2c_gate {
TDA18271_GATE_AUTO = 0,
TDA18271_GATE_ANALOG,
TDA18271_GATE_DIGITAL,
};
enum tda18271_output_options {
/* slave tuner output & loop through & xtal oscillator always on */
TDA18271_OUTPUT_LT_XT_ON = 0,
/* slave tuner output loop through off */
TDA18271_OUTPUT_LT_OFF = 1,
/* xtal oscillator off */
TDA18271_OUTPUT_XT_OFF = 2,
};
enum tda18271_small_i2c {
TDA18271_39_BYTE_CHUNK_INIT = 0,
TDA18271_16_BYTE_CHUNK_INIT = 16,
TDA18271_08_BYTE_CHUNK_INIT = 8,
TDA18271_03_BYTE_CHUNK_INIT = 3,
};
struct tda18271_config {
/* override default if freq / std settings (optional) */
struct tda18271_std_map *std_map;
/* master / slave tuner: master uses main pll, slave uses cal pll */
enum tda18271_role role;
/* use i2c gate provided by analog or digital demod */
enum tda18271_i2c_gate gate;
/* output options that can be disabled */
enum tda18271_output_options output_opt;
/* some i2c providers can't write all 39 registers at once */
enum tda18271_small_i2c small_i2c;
/* force rf tracking filter calibration on startup */
unsigned int rf_cal_on_startup:1;
/* prevent any register access during attach(),
* delaying both IR & RF calibration until init()
* module option 'cal' overrides this delay */
unsigned int delay_cal:1;
/* interface to saa713x / tda829x */
unsigned int config;
};
Annotation
- Immediate include surface: `linux/i2c.h`, `media/dvb_frontend.h`.
- Detected declarations: `struct tda18271_std_map_item`, `struct tda18271_std_map`, `struct tda18271_config`, `enum tda18271_role`, `enum tda18271_i2c_gate`, `enum tda18271_output_options`, `enum tda18271_small_i2c`, `enum tda18271_mode`.
- 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.