STRUCT KEYBOARD_PROTOCOL(9)

💖 struct keyboard_protocol(9) 💖

hiii bestie!! welcome to the Kernel API Manual — today’s main character is struct keyboard_protocol, and honestly it’s giving keyboard-message excellence 💅✨

🌸 NAME 🌸

struct keyboard_protocol — the keyboard message, periodt. This message has message.type = 0x0110 and message.length = 0x000a 🎀

🦋 SYNOPSIS 🦋

okay so here’s the exact struct, bestie — no edits, no vibes-based changes, literally character for character:

struct keyboard_protocol {
    u8 unknown1;
    u8 modifiers;
    u8 unknown2;
    u8 keys_pressed[MAX_ROLLOVER];
    u8 fn_pressed;
    __le16 crc16;
 };

🧚 Members 🧚

okay let’s do the member-by-member vibe check 👑

• unknown1 — unknown. The mystery is literally part of the lore 🙈
• modifiers — bit-set of modifier/control keys pressed 🎛️
• unknown2 — unknown. Another mystery box, bestie 🎁
• keys_pressed — the (non-modifier) keys currently pressed ⌨️
• fn_pressed — whether the fn key is currently pressed ✨
• crc16 — the crc over the whole message struct (message header + this struct) minus this crc16 field 🫶

🔗 SEE ALSO 🔗

go be nosy in these, bestie 🔍💖

• Kernel file ./drivers/input/keyboard/applespi.c
• struct tp_finger(9)
• struct touchpad_protocol(9)
• struct command_protocol_tp_info(9)
• struct touchpad_info_protocol(9)
• struct command_protocol_mt_init(9)
• struct command_protocol_capsl(9)
• struct command_protocol_bl(9)
• struct message(9)
• struct spi_packet(9)

that’s the whole page, bestie 💅✨ — with love from ./drivers/input/keyboard, October 2026 🫶