Hello.
On 05-03-2012 15:11, Lukasz Majewski wrote:
When sent data length is equal to maximum packet size (MPS
= 64B for EP0), then a ZLP packet shall be sent to indicate
end of the transfer to a USB host.
Tested with:
- DFU gadget (various size of the sent data - also packet = MPS)
- Ethernet gadget (CDC and RNDIS)
- Multi Function Gadget (g_multi)
HW:
- Samsung's C210 Universal rev.0
Signed-off-by: Lukasz Majewski<[email protected]>
Signed-off-by: Kyungmin Park<[email protected]>
---
drivers/usb/gadget/s3c-hsotg.c | 26 ++++++++++++++++++++++++--
1 files changed, 24 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index 0492c20..89e49ce 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
[...]
@@ -1829,9 +1839,21 @@ static void s3c_hsotg_complete_in(struct s3c_hsotg
*hsotg,
__func__, hs_req->req.actual, size_done);
hs_req->req.actual = size_done;
+ dev_dbg(hsotg->dev, "req->length:%d req->actual:%d\n",
+ hs_req->req.length, hs_req->req.actual);
- /* if we did all of the transfer, and there is more data left
- * around, then try restarting the rest of the request */
+ /* Check if dealing with Maximum Packet Size(MPS) IN transfer (EP0)
+ * When req.lenght == ep.maxpacket then send IN ZLP packet to
+ * inform host that no more data is available.
+ */
+ if (hs_req->req.length == hs_req->req.actual&& hs_ep->index == 0
+ && hs_req->req.length == hs_ep->ep.maxpacket) {
Not 'hs_req->req.length % hs_ep->ep.maxpacket == 0'?
WBR, Sergei
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