@@ -2449,8 +2449,12 @@ static int __devinit qe_udc_reg_init(struct qe_udc *udc)
struct usb_ctlr __iomem *qe_usbregs;
qe_usbregs = udc->usb_regs;
- /* Init the usb register */
+ /* Spec says that we must enable the USB controller to change mode. */
out_8(&qe_usbregs->usb_usmod, 0x01);
+ /* Mode changed, now disable it, since muram isn't initialized yet. */
+ out_8(&qe_usbregs->usb_usmod, 0x00);
+
+ /* Initialize the rest. */
out_be16(&qe_usbregs->usb_usbmr, 0);
out_8(&qe_usbregs->usb_uscom, 0);
out_be16(&qe_usbregs->usb_usber, USBER_ALL_CLEAR);
qe_udc_reg_init() leaves the USB controller enabled before muram memory initialized. Sometimes the uninitialized muram memory confuses the controller, and it start sending the busy interrupts. Fix this by disabling the controller, it will be enabled later by the gadget driver, at bind time. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> --- drivers/usb/gadget/fsl_qe_udc.c | 6 +++++- 1 files changed, 5 insertions(+), 1 deletions(-)