From: Cliff Cai <cliff.cai@xxxxxxxxxx>
Some Blackfin MUSB versions of hardware have problems with mode1 and max
packet sizes (interrupts are not generated). So in this case, fall back
to mode0 automatically.
Signed-off-by: Cliff Cai <cliff.cai@xxxxxxxxxx>
Signed-off-by: Mike Frysinger <vapier@xxxxxxxxxx>
---
drivers/usb/musb/musb_gadget.c | 10 ++++++++--
1 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
index 7577094..6a14601 100644
--- a/drivers/usb/musb/musb_gadget.c
+++ b/drivers/usb/musb/musb_gadget.c
@@ -308,10 +308,16 @@ static void txstate(struct musb *musb, struct musb_request *req)
{
size_t request_size;
- /* setup DMA, then program endpoint CSR */
+ /* setup DMA, then program endpoint CSR,
+ * currently, don't use mode1 on Blackfin.
+ */
+#if !defined(CONFIG_BLACKFIN) || defined(USE_MODE1)
request_size = min_t(size_t, request->length,
musb_ep->dma->max_len);
- if (request_size < musb_ep->packet_sz)
+#else
+ request_size = fifo_count;
+#endif
+ if (request_size <= musb_ep->packet_sz)
musb_ep->dma->desired_mode = 0;
else
musb_ep->dma->desired_mode = 1;
--
1.6.5.4
--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
