STRUCT USB_OHCI_PDATA(9)

✨ struct usb_ohci_pdata — the kernel API manual, bestie edition ✨

okay so real talk, this is a page from the Kernel API Manual and it's literally about struct usb_ohci_pdata — the platform_data for the generic ohci driver. that's the whole vibe. it's giving "little struct, big responsibilities" 🎀

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🌸 NAME 🌸

struct usb_ohci_pdata — the platform_data for the generic ohci driver. yes bestie, that's it, that's the job 💅

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✨ SYNOPSIS ✨

here's the whole struct, copied exactly, don't @ me:

struct usb_ohci_pdata {
    unsigned big_endian_desc:1;
    unsigned big_endian_mmio:1;
    unsigned no_big_frame_no:1;
    unsigned int    num_ports;
    int (*power_on)(struct platform_device *pdev);
    void (*power_off)(struct platform_device *pdev);
    void (*power_suspend)(struct platform_device *pdev);
 };

like look at those little :1 bitfields, they're so tiny and so important 🦋

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🧚 Members 🧚

okay let's go member by member, no skips, no cap:

• big_endian_desc — BE descriptors. it's big endian, for the descriptors. iconic ✨
• big_endian_mmio — BE registers. big endian again, but this time for the memory-mapped I/O registers 🫶
• no_big_frame_no — no big endian frame_no shift. that's it, that's the whole thing, no shift for you 💀
• num_ports — number of ports. an unsigned int, because ports are many 🌈
• power_on — a function pointer, int (*power_on)(struct platform_device *pdev); — takes a struct platform_device *pdev and returns an int 👑
• power_off — a function pointer, void (*power_off)(struct platform_device *pdev); — takes a struct platform_device *pdev, returns nothing 💜
• power_suspend — a function pointer, void (*power_suspend)(struct platform_device *pdev); — takes a struct platform_device *pdev, returns nothing either 🌸

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💖 Description 💖

so what are these, you ask? these are the general configuration options for the OHCI controller. all of them. and here's the tea: every single one of these options is lowkey just activating a workaround — more or less — for some specific hardware out there in the wild 😭 like every flag is a little "this hardware is quirky so we do this instead" note. it's giving hardware whisperer energy, fr fr.

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🔥 SEE ALSO 🔥

• the kernel file ./include/linux/usb/ohci_pdriver.h — go read it, bestie, iykyk ⭐

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and that's the page!! 🎀 this one lives in ./include/linux/usb, it's dated October 2026, and it's part of the Kernel API Manual. mwah, go forth and configure your OHCI controller responsibly 💅🦋✨