This bit allows the MUSB controller to negotiate for high-speed mode when the device is reset by the hub. If unset, Babble errors occur with high-speed mass storage devices right after the first packet. This condition is not caught by the interrupt handles in U-Boot, so no recovery is done, and the USB communication is stuck.
To fix this, set the bit unconditionally, not only for CONFIG_USB_GADGET_DUALSPEED but also for host-only modes.
Signed-off-by: Daniel Mack zonque@gmail.com --- drivers/usb/musb-new/musb_core.c | 2 -- 1 file changed, 2 deletions(-)
diff --git a/drivers/usb/musb-new/musb_core.c b/drivers/usb/musb-new/musb_core.c index 36681b6..eeaacdf 100644 --- a/drivers/usb/musb-new/musb_core.c +++ b/drivers/usb/musb-new/musb_core.c @@ -943,9 +943,7 @@ void musb_start(struct musb *musb)
/* put into basic highspeed mode and start session */ musb_writeb(regs, MUSB_POWER, MUSB_POWER_ISOUPDATE -#ifdef CONFIG_USB_GADGET_DUALSPEED | MUSB_POWER_HSENAB -#endif /* ENSUSPEND wedges tusb */ /* | MUSB_POWER_ENSUSPEND */ );