STRUCT BRCMF_BTCOEX_INFO(9)

🌸 struct brcmf_btcoex_info(9) — the Kernel API Manual glow-up 🌸

okay so bestie, we're in the Kernel API Manual today and the star of the show is struct brcmf_btcoex_info(9) — think of it as the little backstage notebook where the Broadcom driver keeps all its Bluetooth-coexistence info 💖 it's literally called BT coex related information in the NAME, and honestly? iconic, no notes.

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✨ SYNOPSIS ✨

here's the whole struct, every field, verbatim, don't @ me:

struct brcmf_btcoex_info {
    struct brcmf_cfg80211_vif *vif;
    struct timer_list timer;
    u16 timeout;
    bool timer_on;
    bool dhcp_done;
    enum brcmf_btcoex_state bt_state;
    struct work_struct work;
    struct brcmf_cfg80211_info *cfg;
    u32 reg66;
    u32 reg41;
    u32 reg68;
    bool saved_regs_part1;
    u32 reg50;
    u32 reg51;
    u32 reg64;
    u32 reg65;
    u32 reg71;
    bool saved_regs_part2;
 };

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🎀 Members 🎀

like, every single one, in order, because we do not skip:

• vif — the interface this whole request was done for, bestie 🫶
• timer — the timer for the DHCP state machine (yes, the DHCP state machine, she's got ✨lore✨)
• timeout — the configured timeout. as in, what you set. that one 🎀
• timer_on — DHCP timer is active, clock's ticking ⏰
• dhcp_done — DHCP finished before T1/T2 timer expiration, slay 🌈
• bt_state — the DHCP state machine state, the main character of the whole struct 💅
• work — the DHCP state machine work, getting scheduled and doing its thing
• cfg — driver private data for the cfg80211 interface 🔥
• reg66 — saved value of btc_params 66
• reg41 — saved value of btc_params 41
• reg68 — saved value of btc_params 68
• saved_regs_part1 — flag indicating regs 66,41,68 have been saved ✅
• reg50 — saved value of btc_params 50
• reg51 — saved value of btc_params 51
• reg64 — saved value of btc_params 64
• reg65 — saved value of btc_params 65
• reg71 — saved value of btc_params 71
• saved_regs_part2 — flag indicating regs 50,51,64,65,71 have been saved ✅✅

ngl the part1 / part2 split is giving two separate friend groups who both think they're the closest ones 😭 but it's fine, it's fine, they both save their regs and they both have a flag.

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👀 SEE ALSO 👀

go read these, fr fr, the whole crew:

• the kernel file ./drivers/net/wireless/broadcom/brcm80211/brcmfmac/btcoex.c

and the homies:

• enum brcmf_btcoex_state(9)
• brcmf_btcoex_params_write(9)
• brcmf_btcoex_params_read(9)
• brcmf_btcoex_boost_wifi(9)
• brcmf_btcoex_is_sco_active(9)
• brcmf_btcoex_handler(9)
• brcmf_btcoex_attach(9)
• brcmf_btcoex_detach(9)

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💜 one tiny heads-up from the page itself: that source path down in the footer gets truncated to ./drivers/net/wireless/broadco... — not me being lazy, that's literally how it shows up, iykyk 🧚

okay that's the whole page and you ate it up 💅 bye bestie — this one came from ./drivers/net/wireless/broadco... and is dated October 2026, and the footer still signs it struct brcmf_btcoex_info(9), periodt 🦋