STRUCT EM28XX_USB_CTL(9)

💅 struct em28xx_usb_ctl(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ this one's a struct page, and honestly? she's giving backstage pass to the URB pipeline. let's get into it 🎀

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✨ NAME ✨

struct em28xx_usb_ctl — literally the home of all your URB-related buffer data 🦋 no cap, that's the whole vibe.

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✨ SYNOPSIS ✨

struct em28xx_usb_ctl {
    struct em28xx_usb_bufs          analog_bufs;
    struct em28xx_usb_bufs          digital_bufs;
    struct em28xx_buffer    *vid_buf;
    struct em28xx_buffer    *vbi_buf;
    int (*urb_data_copy)(struct em28xx *dev, struct urb *urb);
 };

look at her. five members. main character energy, fr fr 👑

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🫶 Members 🫶

• analog_bufs — the isoc/bulk transfer buffers for analog mode 💖 when you're in analog era, this is where the buffering lives.
• digital_bufs — the isoc/bulk transfer buffers for digital mode 🌈 same deal, but digital. she contains multitudes.
• vid_buf — stores already requested video buffers 🎀 key word: already requested. not new ones. the ones that asked first.
• vbi_buf — stores already requested VBI buffers 🦋 yes, VBI gets her own field. vertical blanking interval girlies stay winning.
• urb_data_copy — the function pointer that copies data from the URB 🔥 signature is int (*urb_data_copy)(struct em28xx *dev, struct urb *urb), iykyk.

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🌸 SEE ALSO 🌸

• the kernel file ./drivers/media/usb/em28xx/em28xx.h — that's where she actually lives 💜
• struct em28xx_usb_bufs(9)
• struct em28xx_fmt(9)
• struct em28xx_buffer(9)
• enum em28xx_amux(9)

go read those next, bestie, they're all in the same friend group 🧚

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lowkey reminder: this page is struct documentation, so every field above is a real part of the layout — no invented fields, no skipping. slay responsibly 💅

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and that's the page!! mwah 💋 this cutie came out of ./drivers/media/usb/em28xx, dated October 2026, and yes she's still titled struct em28xx_usb_ctl(9) — periodt. 🍓⭐