dwc2_flush_tx_fifo(9)

✨ dwc2_flush_tx_fifo - bestie, we're flushing a Tx FIFO 💅

Okay so real talk: this is a page from the Kernel API Manual (that's the manual name, don't @ me), and it's about one little function that does one little thing. But the way that thing is essential to the DWC2 USB driver? Obsessed. 🫶

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🌸 NAME 🌸

dwc2_flush_tx_fifo — Flushes a Tx FIFO

That's it. That's the whole job. Clearing out the transmit FIFO like it's a group chat you need to mute. 🧹✨

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🎀 SYNOPSIS 🎀

void dwc2_flush_tx_fifo (struct dwc2_hsotg *hsotg , const int num );

No return value, no drama, just vibes and a void. Periodt. 💀

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🦋 ARGUMENTS 🦋

• hsotg — Programming view of DWC_otg controller. This is the main character of the whole driver, lowkey. 👑
• num — Tx FIFO to flush. Yes, there's more than one. Pick your fighter. 🥊

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🌈 SEE ALSO 🌈

Bestie, the friend group is huge. This function hangs out in the kernel file ./drivers/usb/dwc2/core.c, and here's the whole squad:

• dwc2_backup_global_registers(9)
• dwc2_restore_global_registers(9)
• dwc2_exit_partial_power_down(9)
• dwc2_enter_partial_power_down(9)
• dwc2_restore_essential_regs(9)
• dwc2_hib_restore_common(9)
• dwc2_wait_for_mode(9)
• dwc2_iddig_filter_enabled(9)
• dwc2_force_mode(9)
• dwc2_clear_force_mode(9)
• dwc2_dump_host_registers(9)
• dwc2_dump_global_registers(9)
• dwc2_flush_rx_fifo(9)
• dwc2_enable_global_interrupts(9)
• dwc2_disable_global_interrupts(9)
• dwc2_hsotg_wait_bit_set(9)
• dwc2_hsotg_wait_bit_clear(9)

So many siblings, it's giving family reunion. 🍓 And they all live in ./drivers/usb/dwc2, iykyk.

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Ngl this page is short, but sometimes the simplest functions carry the whole squad. Flush that FIFO and move on. 💪

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And that's a wrap, bestie! 🌸 This little page is from October 2026, lives in the ./drivers/usb/dwc2 source tree, and the manpage header/footer said dwc2_flush_tx_fifo(9) at both ends — iconic symmetry, honestly. 💖 Stay flushed, stay fierce. 🎀✨