dwc2_assign_and_init_hc(9)

💖 NAME 💖

okay so this is dwc2_assign_and_init_hc(9) from the Kernel API Manual, and it’s giving “matchmaker for USB transactions” energy. ✨ It assigns transactions from a QTD to a free host channel, initializes that host channel to perform the transactions, and — important — removes the host channel from the free list. No cap. 💅

🦋 SYNOPSIS 🦋

the whole signature is:

int dwc2_assign_and_init_hc (struct dwc2_hsotg *hsotg , struct dwc2_qh *qh );

🎀 ARGUMENTS 🎀

• hsotg — the HCD state structure. that’s the main-character struct right there.
• qh — the transactions from the first QTD for this QH are selected and assigned to a free host channel. 👑

🌈 SEE ALSO 🌈

if you wanna follow the lore, the Kernel file is ./drivers/usb/dwc2/hcd.c, and here are all the related function besties — yes, all of them:

• dwc2_enable_common_interrupts(9)
• dwc2_enable_host_interrupts(9)
• dwc2_disable_host_interrupts(9)
• dwc2_calc_frame_interval(9)
• dwc2_read_packet(9)
• dwc2_dump_channel_info(9)
• dwc2_hc_init(9)
• dwc2_hc_halt(9)
• dwc2_hc_cleanup(9)
• dwc2_hc_set_even_odd_frame(9)
• dwc2_hc_write_packet(9)
• dwc2_hc_do_ping(9)
• dwc2_hc_start_transfer(9)
• dwc2_hc_start_transfer_ddma(9)
• dwc2_hc_continue_transfer(9)
• dwc2_hcd_start(9)
• dwc2_hcd_connect(9)
• dwc2_hcd_disconnect(9)
• dwc2_hcd_rem_wakeup(9)
• dwc2_hcd_stop(9)
• dwc2_core_init(9)
• dwc2_core_host_init(9)
• dwc2_hcd_select_transactions(9)
• dwc2_queue_transaction(9)
• dwc2_hcd_queue_transactions(9)
• dwc2_port_suspend(9)
• dwc2_port_resume(9)
• dwc2_host_get_tt_info(9)
• dwc2_host_put_tt_info(9)
• dwc2_backup_host_registers(9)
• dwc2_restore_host_registers(9)
• dwc2_host_enter_hibernation(9)
• dwc2_host_enter_partial_power_down(9)
• dwc2_host_enter_clock_gating(9)
• dwc2_host_exit_clock_gating(9)

mwah 💋 this one lives in ./drivers/usb/dwc2 and is dated October 2026 — periodt, bestie. 🫶