From: Stephen Warren swarren@nvidia.com
ci_ep_queue() currently only fills in the page0/page1 fields in the queue item. If the buffer is larger than 4KiB (unaligned) or 8KiB (page-aligned), then this prevents the HW from knowing where to write the balance of the data.
Fix this by initializing all 5 pageN pointers, which allows up to 16KiB (potentially non-page-aligned) buffers.
Signed-off-by: Stephen Warren swarren@nvidia.com --- drivers/usb/gadget/ci_udc.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/drivers/usb/gadget/ci_udc.c b/drivers/usb/gadget/ci_udc.c index 14b1e9b8bf11..815ce7b262ca 100644 --- a/drivers/usb/gadget/ci_udc.c +++ b/drivers/usb/gadget/ci_udc.c @@ -350,6 +350,9 @@ static int ci_ep_queue(struct usb_ep *ep, item->info = INFO_BYTES(len) | INFO_IOC | INFO_ACTIVE; item->page0 = (uint32_t)ci_ep->b_buf; item->page1 = ((uint32_t)ci_ep->b_buf & 0xfffff000) + 0x1000; + item->page2 = ((uint32_t)ci_ep->b_buf & 0xfffff000) + 0x2000; + item->page3 = ((uint32_t)ci_ep->b_buf & 0xfffff000) + 0x3000; + item->page4 = ((uint32_t)ci_ep->b_buf & 0xfffff000) + 0x4000; ci_flush_qtd(num);
head->next = (unsigned) item;