drivers/media/dvb-frontends/au8522_dig.c

Source file repositories/reference/linux-study-clean/drivers/media/dvb-frontends/au8522_dig.c

File Facts

System: Linux kernel
Corpus path: drivers/media/dvb-frontends/au8522_dig.c
Extension: .c
Size: 19239 bytes
Lines: 919
Domain: Driver Families
Bucket: drivers/media
Inferred role: Driver Families: exported/initcall integration point
Status: integration 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.
Exports symbols or registers init work; inspect boot/module ordering and who consumes the exported contract.
Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

linux/kernel.h
linux/init.h
linux/module.h
linux/string.h
linux/delay.h
media/dvb_frontend.h
au8522.h
au8522_priv.h

Detected Declarations

struct mse2snr_tab
function au8522_mse2snr_lookup
function au8522_set_if
function au8522_enable_modulation
function au8522_set_frontend
function au8522_read_status
function au8522_led_status
function au8522_read_snr
function au8522_read_signal_strength
function au8522_read_ucblocks
function au8522_read_ber
function au8522_get_frontend
function au8522_get_tune_settings
function au8522_release
export au8522_attach

Annotated Snippet

struct mse2snr_tab {
	u16 val;
	u16 data;
};

/* VSB SNR lookup table */
static struct mse2snr_tab vsb_mse2snr_tab[] = {
	{   0, 270 },
	{   2, 250 },
	{   3, 240 },
	{   5, 230 },
	{   7, 220 },
	{   9, 210 },
	{  12, 200 },
	{  13, 195 },
	{  15, 190 },
	{  17, 185 },
	{  19, 180 },
	{  21, 175 },
	{  24, 170 },
	{  27, 165 },
	{  31, 160 },
	{  32, 158 },
	{  33, 156 },
	{  36, 152 },
	{  37, 150 },
	{  39, 148 },
	{  40, 146 },
	{  41, 144 },
	{  43, 142 },
	{  44, 140 },
	{  48, 135 },
	{  50, 130 },
	{  43, 142 },
	{  53, 125 },
	{  56, 120 },
	{ 256, 115 },
};

/* QAM64 SNR lookup table */
static struct mse2snr_tab qam64_mse2snr_tab[] = {
	{  15,   0 },
	{  16, 290 },
	{  17, 288 },
	{  18, 286 },
	{  19, 284 },
	{  20, 282 },
	{  21, 281 },
	{  22, 279 },
	{  23, 277 },
	{  24, 275 },
	{  25, 273 },
	{  26, 271 },
	{  27, 269 },
	{  28, 268 },
	{  29, 266 },
	{  30, 264 },
	{  31, 262 },
	{  32, 260 },
	{  33, 259 },
	{  34, 258 },
	{  35, 256 },
	{  36, 255 },
	{  37, 254 },
	{  38, 252 },
	{  39, 251 },
	{  40, 250 },
	{  41, 249 },
	{  42, 248 },
	{  43, 246 },
	{  44, 245 },
	{  45, 244 },
	{  46, 242 },
	{  47, 241 },
	{  48, 240 },
	{  50, 239 },
	{  51, 238 },
	{  53, 237 },
	{  54, 236 },
	{  56, 235 },
	{  57, 234 },
	{  59, 233 },
	{  60, 232 },
	{  62, 231 },
	{  63, 230 },
	{  65, 229 },
	{  67, 228 },
	{  68, 227 },
	{  70, 226 },
	{  71, 225 },

Annotation

Immediate include surface: `linux/kernel.h`, `linux/init.h`, `linux/module.h`, `linux/string.h`, `linux/delay.h`, `media/dvb_frontend.h`, `au8522.h`, `au8522_priv.h`.
Detected declarations: `struct mse2snr_tab`, `function au8522_mse2snr_lookup`, `function au8522_set_if`, `function au8522_enable_modulation`, `function au8522_set_frontend`, `function au8522_read_status`, `function au8522_led_status`, `function au8522_read_snr`, `function au8522_read_signal_strength`, `function au8522_read_ucblocks`.
Atlas domain: Driver Families / drivers/media.
Implementation status: integration 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.