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usb: dwc3: gadget: Fix match_ep callback for NXP UUU tool

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The UUU tool excepts the interrupt-in endpoint to be ep1in, otherwise
it crashes. This is a result of the previous hard-coded EP setup in
drivers/usb/gadget/epautoconf.c which did special-case EP allocation
for SPL builds, and which was since converted to this callback, but
without the special-case EP allocation in SPL part.

This reinstates the SPL part in an isolated manner, only for NXP iMX
SoCs, only for SPL builds, and only for the ep1in interrupt-in endpoint.

Fixes: 1918b8010c ("usb: dwc3: gadget: Convert epautoconf workaround to match_ep callback")
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
Link: https://lore.kernel.org/r/20250319220805.219001-1-marex@denx.de
Signed-off-by: Mattijs Korpershoek <mkorpershoek@baylibre.com>
This commit is contained in:
Marek Vasut 2025-03-19 23:07:52 +01:00 • committed by Mattijs Korpershoek
parent 7ad5436194
commit 0916053ebc
1 changed files with 18 additions and 1 deletions
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19
drivers/usb/dwc3/gadget.c
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@ -1631,8 +1631,25 @@ usb_ep *dwc3_gadget_match_ep(struct usb_gadget *gadget,
return dwc3_find_ep(gadget, "ep1in");
if (usb_endpoint_is_bulk_out(desc))
return dwc3_find_ep(gadget, "ep2out");
if (usb_endpoint_is_int_in(desc))
if (usb_endpoint_is_int_in(desc)) {
/*
* Special workaround for NXP UUU tool in SPL.
*
* The tool excepts the interrupt-in endpoint to be ep1in,
* otherwise it crashes. This is a result of the previous
* hard-coded EP setup in drivers/usb/gadget/epautoconf.c
* which did special-case EP allocation for SPL builds,
* and which was since converted to this callback, but
* without the special-case EP allocation in SPL part.
*
* This reinstates the SPL part in an isolated manner,
* only for NXP iMX SoCs, only for SPL builds, and only
* for the ep1in interrupt-in endpoint.
*/
if (IS_ENABLED(CONFIG_MACH_IMX) && IS_ENABLED(CONFIG_XPL_BUILD))
return dwc3_find_ep(gadget, "ep1in");
return dwc3_find_ep(gadget, "ep3in");
}
return NULL;
}