dwc2_hcd_connect(9)
π dwc2_hcd_connect β the connect handler (yes bestie, that one) π
okay so real talk, this is dwc2_hcd_connect(9), straight out of the Kernel API Manual β¨ β it's the lil function that handles connect of the HCD, and honestly? iconic. main character energy fr fr π
β¨ SYNOPSIS β¨
void dwc2_hcd_connect (struct dwc2_hsotg *hsotg );
like. it returns nothing (void), it takes one pointer, and it does its little job. no cap. π¦
πΈ ARGUMENTS πΈ
hsotgβ Pointer tostruct dwc2_hsotgπ that's it, that's the whole argument, she's simple, she's elegant, she's a pointer to the struct.
π₯ DESCRIPTION π₯
okay so this is the important bit and I need you to listen bestie, because this is not a drill π¨:
Must be called with interrupt disabled and spinlock held π
that's it, that's the whole description, but it is load-bearing, like, do NOT come in here with your interrupts enabled and your spinlock just vibing unlocked. that's not the vibe. that's undefined-adjacent chaos energy and we don't do that π«Ά
π SEE ALSO π
Kernel file ./drivers/usb/dwc2/hcd.c β and now, the whole entire friend group, in order, no one gets left out π:
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_disconnect(9)dwc2_hcd_rem_wakeup(9)dwc2_hcd_stop(9)dwc2_core_init(9)dwc2_core_host_init(9)dwc2_assign_and_init_hc(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)
like, 35 functions. thirty-five. she knows everyone at the party ππ
and that's the page!! πβ¨π¦
this lil slice of kernel lore lives in ./drivers/usb/dwc2, dated October 2026, page version 9 β go forth bestie, connect that HCD, but lock your spinlock first πππ«Ά
π¦ where this page comes from
- nixpkgs unstable: linux-manual 7.3.1
- π girlified by deepseek-ai/DeepSeek-V4.1-Flash-1017 on : a language model's rewrite of the original, under its terms