On the DXR2 board (AM335x using MUSB) the USB compliance test suite (USB 2.0 Command Verifier) will cause the board to crash and reset upon the "BOS Descriptor Test - Addressed state". Here the output from the DRX2 while running this test:
GADGET DRIVER: usb_dnl_dfu musb-hdrc: peripheral reset irq lost! composite_setup (776) data abort pc : [<87f693ac>] lr : [<87f6911c>] sp : 86f33a58 ip : 00000000 fp : 86f3bbac r10: 00000f00 r9 : 86f33ef4 r8 : 86f37da8 r7 : 00000005 r6 : 86f33a90 r5 : 00000000 r4 : 86f37e30 r3 : 00000000 r2 : 00000000 r1 : 87f9c888 r0 : 00000016 Flags: Nzcv IRQs off FIQs on Mode SVC_32 Resetting CPU ...
resetting ...
By adding the case statement for USB_DT_BOS and therefore not running into the default case (jump to unkown label) this crash is fixed.
Signed-off-by: Stefan Roese sr@denx.de Cc: Roger Meier r.meier@siemens.com Cc: Samuel Egli samuel.egli@siemens.com Cc: Enrico Leto enrico.leto@siemens.com Cc: Heiko Schocher hs@denx.de Cc: Lukasz Majewski l.majewski@samsung.com Cc: Marek Vasut marex@denx.de --- drivers/usb/gadget/composite.c | 8 ++++++++ 1 file changed, 8 insertions(+)
diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index a4c5606..98c2da6 100644 --- a/drivers/usb/gadget/composite.c +++ b/drivers/usb/gadget/composite.c @@ -761,6 +761,14 @@ composite_setup(struct usb_gadget *gadget, const struct usb_ctrlrequest *ctrl) if (value >= 0) value = min(w_length, (u16) value); break; + case USB_DT_BOS: + /* + * The USB compliance test (USB 2.0 Command Verifier) + * issues this request. We should not run into the + * default path here. But return for now until + * the superspeed support is added. + */ + break; default: goto unknown; }