xudc_pullup(9)

💖 xudc_pullup(9) 💖

okay bestie, welcome to the Kernel API Manual — this is the xudc_pullup page and it's literally the on/off switch for USB traffic, no cap ✨

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🌸 NAME 🌸

xudc_pullup — start/stop USB traffic 🎀

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✨ SYNOPSIS ✨

int xudc_pullup (struct usb_gadget *gadget , int is_on );

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🦋 ARGUMENTS 🦋

• gadget — pointer to the usb gadget structure. it's giving "here's the gadget, go do ur thing" 🫶
• is_on — flag to start or stop. yes queen, it's literally a boolean era 💅

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⭐ RETURN ⭐

0 always. that's it. that's the whole return. iconic, consistent, zero drama 💀✨

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💜 DESCRIPTION 💜

This function starts/stops the SIE engine of the IP based on is_on 🔥

like — you hand it the gadget, you hand it a flag, and it flips the SIE engine of the IP on or off depending on what is_on is set to. main character behaviour tbh 👑

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🌈 SEE ALSO 🌈

Kernel file ./drivers/usb/gadget/udc/udc-xilinx.c — and the whole friend group:

• struct xusb_req(9)
• struct xusb_ep(9)
• struct xusb_udc(9)
• xudc_write32(9)
• xudc_read32(9)
• xudc_write32_be(9)
• xudc_read32_be(9)
• xudc_wrstatus(9)
• xudc_epconfig(9)
• xudc_start_dma(9)
• xudc_dma_send(9)
• xudc_dma_receive(9)
• xudc_eptxrx(9)
• xudc_done(9)
• xudc_read_fifo(9)
• xudc_write_fifo(9)
• xudc_nuke(9)
• xudc_ep_set_halt(9)
• __xudc_ep_enable(9)
• xudc_ep_enable(9)
• xudc_ep_disable(9)
• xudc_ep_alloc_request(9)
• xudc_free_request(9)
• __xudc_ep0_queue(9)
• xudc_ep0_queue(9)
• xudc_ep_queue(9)
• xudc_ep_dequeue(9)
• xudc_ep0_enable(9)
• xudc_ep0_disable(9)
• xudc_get_frame(9)
• xudc_wakeup(9)
• xudc_eps_init(9)
• xudc_stop_activity(9)
• xudc_start(9)
• xudc_stop(9)
• xudc_clear_stall_all_ep(9)
• xudc_startup_handler(9)
• xudc_ep0_stall(9)
• xudc_setaddress(9)
• xudc_getstatus(9)
• xudc_set_clear_feature(9)
• xudc_handle_setup(9)
• xudc_ep0_out(9)
• xudc_ep0_in(9)
• xudc_ctrl_ep_handler(9)
• xudc_nonctrl_ep_handler(9)
• xudc_irq(9)
• xudc_probe(9)
• xudc_remove(9)

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and that's the page, bestie 🧚💖 this one lives in ./drivers/usb/gadget/udc, and it's dated October 2026 — go off, see u in the next manpage 🎀👑