STRUCT PXA_UDC(9)

🦋 NAME 🦋

ok so this is struct pxa_udc(9) from the Kernel API Manual, and bestie, it's literally the udc structure. like, the whole thing. the main character struct itself. periodt 💅

✨ SYNOPSIS ✨

here's the glow-up, laid out exactly how the kernel gods wrote it:

struct pxa_udc {
    void __iomem                            *regs;
    int irq;
    struct clk                              *clk;
    struct usb_gadget                       gadget;
    struct usb_gadget_driver                *driver;
    struct device                           *dev;
    struct gpio_desc                        *gpiod;
    struct usb_phy                          *transceiver;
    enum ep0_state                          ep0state;
    struct udc_stats                        stats;
    struct udc_usb_ep
udc_usb_ep[NR_USB_ENDPOINTS];
    struct pxa_ep                           pxa_ep[NR_PXA_ENDPOINTS];
    unsigned enabled:1;
    unsigned pullup_on:1;
    unsigned pullup_resume:1;
    unsigned vbus_sensed:1;
    unsigned config:2;
    unsigned last_interface:3;
    unsigned last_alternate:3;
  #ifdef CONFIG_PM;
    unsigned udccsr0;
  #endif;
 };

ngl that one line that just goes struct udc_usb_ep and then drops udc_usb_ep[NR_USB_ENDPOINTS]; on the next line is so real of it. we respect the formatting choices here 🫶

💅 Members 💅

okay, field-by-field tour, no skips, no cap:

• regs — mapped IO space ✨
• irq — udc irq
• clk — udc clock
• driver — bound gadget (zero, g_ether, g_mass_storage, ...) — yeah, the whole little gadget fam 🎀
• dev — device
• gpiod — gpio descriptor of gpio for D+ pullup (or NULL if none)
• transceiver — external transceiver to handle vbus sense and D+ pullup
• ep0state — control endpoint state machine state
• stats — statistics on udc usage
• udc_usb_ep — array of usb endpoints offered by the gadget
• pxa_ep — array of pxa available endpoints
• enabled — UDC was enabled by a previous udc_enable
• pullup_on — if pullup resistor connected to D+ pin
• pullup_resume — if pullup resistor should be connected to D+ pin on resume
• config — UDC active configuration
• last_interface — UDC interface of the last SET_INTERFACE host request
• last_alternate — UDC altsetting of the last SET_INTERFACE host request
• udccsr0 — save of udccsr0 in case of suspend 😴

also lowkey living for the bitfield energy on enabled:1, pullup_on:1, pullup_resume:1, vbus_sensed:1, config:2, last_interface:3, last_alternate:3 — tiny numbers, huge vibes 🧚

🔥 SEE ALSO 🔥

go peek at the kernel file ./drivers/usb/gadget/udc/pxa27x_udc.h and its friends: struct udc_usb_ep(9), struct pxa_ep(9), struct pxa27x_request(9). iykyk 💜

and that's the whole page bestie, slay 🌈💖 — straight out of ./drivers/usb/gadget/udc, dated October 2026, filed under struct pxa_udc(9). go off, king 👑✨