ci_hdrc_gadget_init(9)

💖 ci_hdrc_gadget_init — kernel API manual, but make it make sense 💖

okay so bestie, we're in the kernel API manual today and this page is literally called ci_hdrc_gadget_init(9) — say that five times fast, i dare you 🫶. it's a little function that gets the gadget side of a chipidea USB controller ready to go. tiny page, big "setting up the whole vibe" energy ✨

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✨ NAME ✨

ci_hdrc_gadget_init — initialize device related bits. that's it, that's the whole job: get the device-y parts of the controller set up 🌸

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🎀 SYNOPSIS 🎀

int ci_hdrc_gadget_init(struct ci_hdrc *ci);

it hands you back an int, so, y'know, check it 👀

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🦋 ARGUMENTS 🦋

• ci — the controller. the actual struct ci_hdrc * we're working on, the main character of this whole operation 👑

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💅 DESCRIPTION 💅

okay so here's the tea: this function initializes the gadget — but only if the device is "device capable". that's the whole condition, no cap. if it's not device capable, then like… nothing to init, bestie 💀

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🌈 SEE ALSO 🌈

you want the whole friend group? here's the whole friend group, all in ./drivers/usb/chipidea/udc.c — genuinely iconic file, go read it:

• hw_ep_bit(9)
• hw_device_state(9)
• hw_ep_flush(9)
• hw_ep_disable(9)
• hw_ep_enable(9)
• hw_ep_get_halt(9)
• hw_ep_prime(9)
• hw_ep_set_halt(9)
• hw_port_is_high_speed(9)
• hw_test_and_clear_complete(9)
• hw_test_and_clear_intr_active(9)
• hw_test_and_clear_setup_guard(9)
• hw_test_and_set_setup_guard(9)
• hw_usb_set_address(9)
• hw_usb_reset(9)
• _usb_addr(9)
• _hardware_enqueue(9)
• free_pending_td(9)
• _hardware_dequeue(9)
• _ep_nuke(9)
• _gadget_stop_activity(9)
• isr_reset_handler(9)
• isr_get_status_complete(9)
• _ep_queue(9)
• isr_get_status_response(9)
• isr_setup_status_complete(9)
• isr_setup_status_phase(9)
• isr_tr_complete_low(9)
• isr_setup_packet_handler(9)
• isr_tr_complete_handler(9)
• ci_udc_start(9)
• udc_start(9)
• udc_stop(9)

like, that's thirty-three whole functions, no skips, we're not doing that thing where we summarise and leave half of them out 🙈

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so yeah — that's the page. ./drivers/usb/chipidea, October 2026, and the manual name is ci_hdrc_gadget_init(9) if you need to look it up again. later bestie, go init some device bits 💜🦋