Commit 5425191f authored by Andy Shevchenko's avatar Andy Shevchenko Committed by Greg Kroah-Hartman
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usb: dwc3: gadget: Add support for snps,reserved-endpoints property 



The snps,reserved-endpoints property lists the reserved endpoints
that shouldn't be used for normal transfers. Add support for that
to the driver.

Signed-off-by: default avatarAndy Shevchenko <andriy.shevchenko@linux.intel.com>
Tested-by: default avatarFerry Toth <fntoth@gmail.com>
Acked-by: default avatarThinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/20250212193116.2487289-4-andriy.shevchenko@linux.intel.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent eafba020

drivers/usb/dwc3/gadget.c

+40 −1
Original line number Diff line number Diff line
@@ -3403,14 +3403,53 @@ static int dwc3_gadget_init_endpoint(struct dwc3 *dwc, u8 epnum) 
	return 0;

}



static int dwc3_gadget_get_reserved_endpoints(struct dwc3 *dwc, const char *propname,

					      u8 *eps, u8 num)

{

	u8 count;

	int ret;



	if (!device_property_present(dwc->dev, propname))

		return 0;



	ret = device_property_count_u8(dwc->dev, propname);

	if (ret < 0)

		return ret;

	count = ret;



	ret = device_property_read_u8_array(dwc->dev, propname, eps, min(num, count));

	if (ret)

		return ret;



	return count;

}



static int dwc3_gadget_init_endpoints(struct dwc3 *dwc, u8 total)

{

	const char			*propname = "snps,reserved-endpoints";

	u8				epnum;

	u8				reserved_eps[DWC3_ENDPOINTS_NUM];

	u8				count;

	u8				num;

	int				ret;



	INIT_LIST_HEAD(&dwc->gadget->ep_list);



	ret = dwc3_gadget_get_reserved_endpoints(dwc, propname,

						 reserved_eps, ARRAY_SIZE(reserved_eps));

	if (ret < 0) {

		dev_err(dwc->dev, "failed to read %s\n", propname);

		return ret;

	}

	count = ret;



	for (epnum = 0; epnum < total; epnum++) {

		int			ret;

		for (num = 0; num < count; num++) {

			if (epnum == reserved_eps[num])

				break;

		}

		if (num < count)

			continue;



		ret = dwc3_gadget_init_endpoint(dwc, epnum);

		if (ret)