diff options
Diffstat (limited to 'drivers/usb/gadget/tegra_udc.c')
| -rw-r--r-- | drivers/usb/gadget/tegra_udc.c | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/drivers/usb/gadget/tegra_udc.c b/drivers/usb/gadget/tegra_udc.c index 0fd68f7bfb4b..b4141f4c5d06 100644 --- a/drivers/usb/gadget/tegra_udc.c +++ b/drivers/usb/gadget/tegra_udc.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2012-2014, NVIDIA CORPORATION. All rights reserved. + * Copyright (c) 2012-2016, NVIDIA CORPORATION. All rights reserved. * * Description: * High-speed USB device controller driver. @@ -911,6 +911,20 @@ static struct ep_td_struct *tegra_build_dtd(struct tegra_req *req, dtd->size_ioc_sts = cpu_to_le32(swap_temp); + /* The short packet happened with ISO multi-transaction */ + if (req->ep->ep.mult && ((req->ep->desc->bmAttributes & + 0x3) == USB_ENDPOINT_XFER_ISOC)) { + if (*length <= req->ep->ep.maxpacket) { + swap_temp = cpu_to_le32(dtd->size_ioc_sts); + swap_temp |= DTD_MULTO_MULTIPLIER_1; + dtd->size_ioc_sts = cpu_to_le32(swap_temp); + } else if (*length <= (req->ep->ep.maxpacket * + req->ep->ep.mult)) { + swap_temp = cpu_to_le32(dtd->size_ioc_sts); + swap_temp |= DTD_MULTO_MULTIPLIER_2; + dtd->size_ioc_sts = cpu_to_le32(swap_temp); + } + } mb(); VDBG("length = %d address= 0x%x", *length, (int)*dma); |