Documentation/usb/gadget_hid.rst

File Facts

System

Linux kernel

Corpus path

Documentation/usb/gadget_hid.rst

Extension

.rst

Size

11838 bytes

Lines

458

Domain

Support Tooling And Documentation

Bucket

Documentation

Inferred role

Support Tooling And Documentation: documentation

Status

atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

• Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
• Defines or uses C structs; map object ownership, embedded links, reference counts, and lock ownership.

Dependency Surface

• linux/platform_device.h
• linux/usb/g_hid.h
• pthread.h
• string.h
• stdio.h
• ctype.h
• fcntl.h
• errno.h
• stdlib.h
• unistd.h

Detected Declarations

• struct options
• function keyboard_fill_report
• function mouse_fill_report
• function joystick_fill_report
• function print_options
• function main

Annotated Snippet

struct options {
	const char    *opt;
	unsigned char val;
  };

  static struct options kmod[] = {
	{.opt = "--left-ctrl",		.val = 0x01},
	{.opt = "--right-ctrl",		.val = 0x10},
	{.opt = "--left-shift",		.val = 0x02},
	{.opt = "--right-shift",	.val = 0x20},
	{.opt = "--left-alt",		.val = 0x04},
	{.opt = "--right-alt",		.val = 0x40},
	{.opt = "--left-meta",		.val = 0x08},
	{.opt = "--right-meta",		.val = 0x80},
	{.opt = NULL}
  };

  static struct options kval[] = {
	{.opt = "--return",	.val = 0x28},
	{.opt = "--esc",	.val = 0x29},
	{.opt = "--bckspc",	.val = 0x2a},
	{.opt = "--tab",	.val = 0x2b},
	{.opt = "--spacebar",	.val = 0x2c},
	{.opt = "--caps-lock",	.val = 0x39},
	{.opt = "--f1",		.val = 0x3a},
	{.opt = "--f2",		.val = 0x3b},
	{.opt = "--f3",		.val = 0x3c},
	{.opt = "--f4",		.val = 0x3d},
	{.opt = "--f5",		.val = 0x3e},
	{.opt = "--f6",		.val = 0x3f},
	{.opt = "--f7",		.val = 0x40},
	{.opt = "--f8",		.val = 0x41},
	{.opt = "--f9",		.val = 0x42},
	{.opt = "--f10",	.val = 0x43},
	{.opt = "--f11",	.val = 0x44},
	{.opt = "--f12",	.val = 0x45},
	{.opt = "--insert",	.val = 0x49},
	{.opt = "--home",	.val = 0x4a},
	{.opt = "--pageup",	.val = 0x4b},
	{.opt = "--del",	.val = 0x4c},
	{.opt = "--end",	.val = 0x4d},
	{.opt = "--pagedown",	.val = 0x4e},
	{.opt = "--right",	.val = 0x4f},
	{.opt = "--left",	.val = 0x50},
	{.opt = "--down",	.val = 0x51},
	{.opt = "--kp-enter",	.val = 0x58},
	{.opt = "--up",		.val = 0x52},
	{.opt = "--num-lock",	.val = 0x53},
	{.opt = NULL}
  };

  int keyboard_fill_report(char report[8], char buf[BUF_LEN], int *hold)
  {
	char *tok = strtok(buf, " ");
	int key = 0;
	int i = 0;

	for (; tok != NULL; tok = strtok(NULL, " ")) {

		if (strcmp(tok, "--quit") == 0)
			return -1;

		if (strcmp(tok, "--hold") == 0) {
			*hold = 1;
			continue;
		}

		if (key < 6) {
			for (i = 0; kval[i].opt != NULL; i++)
				if (strcmp(tok, kval[i].opt) == 0) {

Annotation

• Immediate include surface: `linux/platform_device.h`, `linux/usb/g_hid.h`, `pthread.h`, `string.h`, `stdio.h`, `ctype.h`, `fcntl.h`, `errno.h`.
• Detected declarations: `struct options`, `function keyboard_fill_report`, `function mouse_fill_report`, `function joystick_fill_report`, `function print_options`, `function main`.
• Atlas domain: Support Tooling And Documentation / Documentation.
• Implementation status: atlas-only.

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.