From: Chris Morgan <[email protected]> Since EP0 transactions need to be completed before the controller halt sequence is finished, this may take some time depending on the host and the enabled functions. Increase the controller halt timeout, so that we give the controller sufficient time to handle EP0 transfers.
This patch was originally submitted to Linux in 2022, but is required to use USB gadget mode on my device in U-Boot. [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=461ee467507cb98a348fa91ff8460908bb0ea423 Signed-off-by: Wesley Cheng <[email protected]> Signed-off-by: Chris Morgan <[email protected]> --- drivers/usb/dwc3/gadget.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c index 2b01113d54c..d2ae892d554 100644 --- a/drivers/usb/dwc3/gadget.c +++ b/drivers/usb/dwc3/gadget.c @@ -1396,7 +1396,7 @@ static int dwc3_gadget_set_selfpowered(struct usb_gadget *g, static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) { u32 reg; - u32 timeout = 500; + u32 timeout = 2000; reg = dwc3_readl(dwc->regs, DWC3_DCTL); if (is_on) { @@ -1425,6 +1425,7 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) dwc3_writel(dwc->regs, DWC3_DCTL, reg); do { + udelay(2000); reg = dwc3_readl(dwc->regs, DWC3_DSTS); if (is_on) { if (!(reg & DWC3_DSTS_DEVCTRLHLT)) @@ -1436,7 +1437,6 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend) timeout--; if (!timeout) return -ETIMEDOUT; - udelay(1); } while (1); dev_vdbg(dwc->dev, "gadget %s data soft-%s\n", -- 2.43.0
