STRUCT CDNSP_CAP_REGS(9)

💅 struct cdnsp_cap_regs(9)

okay so this is a page straight out of the Kernel API Manual — yes, bestie, the actual kernel docs — and it's all about struct cdnsp_cap_regs, aka the CDNSP Registers ✨

Think of it as the little bundle of capability registers at the front of the CDNSP (Cadence USB) controller: the vibe-check zone where the hardware tells you what it can do 🎀

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🌸 SYNOPSIS 🌸

struct cdnsp_cap_regs {
    __le32 hc_capbase;
    __le32 hcs_params1;
    __le32 hcs_params2;
    __le32 hcs_params3;
    __le32 hcc_params;
    __le32 db_off;
    __le32 run_regs_off;
    __le32 hcc_params2;
 };

no cap, that's the whole struct — eight __le32 fields, all matching up with the hardware register layout 💖

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🦋 Members 🦋

• hc_capbase — the capability register length plus the controller's version number. like the controller introducing itself fr fr 👑
• hcs_params1 — HCSPARAMS1 — Structural Parameters 1 🌸
• hcs_params2 — HCSPARAMS2 — Structural Parameters 2 🌸
• hcs_params3 — HCSPARAMS3 — Structural Parameters 3 🌸

(yes bestie, they really went 1, 2, 3 — structural parameters are just built like that 💅)

• hcc_params — HCCPARAMS — Capability Parameters ✨
• db_off — DBOFF — Doorbell array offset 🔔
• run_regs_off — RTSOFF — Runtime register space offset 🔥
• hcc_params2 — HCCPARAMS2 Capability Parameters 2, (the trailing comma is canon, don't come for me 🙈)

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⭐ SEE ALSO ⭐

Kernel file ./drivers/usb/cdns3/cdnsp-gadget.h — and honestly the whole CDNSP friend group shows up here, so let's give them their moment 💜

• struct cdnsp_op_regs(9)
• struct cdnsp_port_regs(9)
• struct cdnsp_intr_reg(9)
• struct cdnsp_run_regs(9)
• struct cdnsp_rev_cap(9)
• struct cdnsp_doorbell_array(9)
• struct cdnsp_container_ctx(9)
• struct cdnsp_slot_ctx(9)
• struct cdnsp_ep_ctx(9)
• struct cdnsp_stream_info(9)
• struct cdnsp_ep(9)
• struct cdnsp_device_context_array(9)
• struct cdnsp_transfer_event(9)
• struct cdnsp_link_trb(9)
• struct cdnsp_event_cmd(9)
• struct cdnsp_segment(9)
• struct cdnsp_td(9)
• struct cdnsp_dequeue_state(9)
• struct cdnsp_ring(9)
• struct cdnsp_erst_entry(9)
• struct cdnsp_erst(9)
• struct cdnsp_request(9)
• struct cdnsp_port(9)
• struct cdnsp_device(9)
• next_request(9)

like, that's a whole group chat of structs and they're all iconique 🫶

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heads up bestie: every field in here is __le32, so keep your endianness game strong or the vibe check will NOT pass 💀

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and that's the tea 🍓 this lil page lives in ./drivers/usb/cdns3, dated October 2026 — catch you in the kernel source, mwah 💋✨