diff options
Diffstat (limited to 'lib/libusb/libusb20.c')
| -rw-r--r-- | lib/libusb/libusb20.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/lib/libusb/libusb20.c b/lib/libusb/libusb20.c index f8edfc38d343..bcaa1e47ff13 100644 --- a/lib/libusb/libusb20.c +++ b/lib/libusb/libusb20.c @@ -156,14 +156,20 @@ libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize, uint32_t MaxFrameCount, uint8_t ep_no) { uint32_t size; + uint8_t pre_scale; int error; - if (xfer->is_opened) { + if (xfer->is_opened) return (LIBUSB20_ERROR_BUSY); + if (MaxFrameCount & LIBUSB20_MAX_FRAME_PRE_SCALE) { + MaxFrameCount &= ~LIBUSB20_MAX_FRAME_PRE_SCALE; + pre_scale = 1; + } else { + pre_scale = 0; } - if (MaxFrameCount == 0) { + if (MaxFrameCount == 0) return (LIBUSB20_ERROR_INVALID_PARAM); - } + xfer->maxFrames = MaxFrameCount; size = MaxFrameCount * sizeof(xfer->pLength[0]); @@ -182,7 +188,7 @@ libusb20_tr_open(struct libusb20_transfer *xfer, uint32_t MaxBufSize, memset(xfer->ppBuffer, 0, size); error = xfer->pdev->methods->tr_open(xfer, MaxBufSize, - MaxFrameCount, ep_no); + MaxFrameCount, ep_no, pre_scale); if (error) { free(xfer->ppBuffer); |