bcm63xx_ep0_map_write(9)

💅 bcm63xx_ep0_map_write(9)

okay so bestie, welcome to the Kernel API Manual ✨ you're literally about to learn about one (1) function and honestly it's giving "small but does the important work" energy 🎀

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✨ NAME ✨

bcm63xx_ep0_map_write — it does a dma_map and an iudma_write on a single request. that's it, that's the whole vibe. one request, mapped, written, slayed 💅

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🦋 SYNOPSIS 🦋

void bcm63xx_ep0_map_write (struct bcm63xx_udc *udc , int ch_idx ,
struct usb_request *req );

no cap, that's the entire signature. void return, three args, zero drama 🌸

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💖 ARGUMENTS 💖

three of them, and yes you need all three, i don't make the rules (the kernel does):

• udc — a reference to the device controller. like, the actual controller object. it's the main character here 👑
• ch_idx — the IUDMA channel number. which channel we're on, iykyk 🌈
• req — the USB gadget layer's representation of the request. the gadget-layer version of the request, not the raw one, important distinction bestie 💜

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🌸 SEE ALSO 🌸

okay this list is LONG long, like genuinely. but every single one of these deserves a look, so here we go, no skipping, i promised 🫶

Kernel file ./drivers/usb/gadget/udc/bcm63xx_udc.c — plus these legends:

• struct iudma_ch_cfg(9)
• struct iudma_ch(9)
• struct bcm63xx_ep(9)
• struct bcm63xx_req(9)
• struct bcm63xx_udc(9)
• bcm63xx_ep_dma_select(9)
• bcm63xx_set_stall(9)
• bcm63xx_fifo_setup(9)
• bcm63xx_fifo_reset_ep(9)
• bcm63xx_fifo_reset(9)
• bcm63xx_ep_init(9)
• bcm63xx_ep_setup(9)
• iudma_write(9)
• iudma_read(9)
• iudma_reset_channel(9)
• iudma_init_channel(9)
• iudma_init(9)
• iudma_uninit(9)
• bcm63xx_set_ctrl_irqs(9)
• bcm63xx_select_phy_mode(9)
• bcm63xx_select_pullup(9)
• bcm63xx_uninit_udc_hw(9)
• bcm63xx_init_udc_hw(9)
• bcm63xx_ep_enable(9)
• bcm63xx_ep_disable(9)
• bcm63xx_udc_alloc_request(9)
• bcm63xx_udc_free_request(9)
• bcm63xx_udc_queue(9)
• bcm63xx_udc_dequeue(9)
• bcm63xx_udc_set_halt(9)
• bcm63xx_udc_set_wedge(9)
• bcm63xx_ep0_setup_callback(9)
• bcm63xx_ep0_spoof_set_cfg(9)
• bcm63xx_ep0_spoof_set_iface(9)
• bcm63xx_ep0_complete(9)
• bcm63xx_ep0_nuke_reply(9)
• bcm63xx_ep0_read_complete(9)
• bcm63xx_ep0_internal_request(9)
• bcm63xx_ep0_do_setup(9)
• bcm63xx_ep0_do_idle(9)
• bcm63xx_ep0_one_round(9)
• bcm63xx_ep0_process(9)
• bcm63xx_udc_get_frame(9)
• bcm63xx_udc_pullup(9)
• bcm63xx_udc_start(9)
• bcm63xx_udc_stop(9)
• bcm63xx_update_cfg_iface(9)
• bcm63xx_update_link_speed(9)
• bcm63xx_update_wedge(9)
• bcm63xx_udc_ctrl_isr(9)
• bcm63xx_udc_data_isr(9)
• bcm63xx_udc_init_debugfs(9)
• bcm63xx_udc_cleanup_debugfs(9)
• bcm63xx_udc_probe(9)
• bcm63xx_udc_remove(9)

like i said. long. but iconic 💀✨

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ngl bestie, this one's short and sweet — one function, three args, one big SEE ALSO list. go read iudma_write(9) next, it's literally right there 🧚

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and that's the tea, babe 🍓 this page lives in ./drivers/usb/gadget/udc, and it's dated October 2026 — so go forth, map your writes, and remember: the kernel loves you back 💜👑