1 files changed, 38 insertions, 0 deletions

diff --git a/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0022-musb-use-dma-mode-1-for-TX-if-transfer-size-equals.patch b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0022-musb-use-dma-mode-1-for-TX-if-transfer-size-equals.patch
new file mode 100644
index 0000000000..16b5b9908b
--- /dev/null
+++ b/meta/recipes-kernel/linux/linux-omap-2.6.29/musb/0022-musb-use-dma-mode-1-for-TX-if-transfer-size-equals.patch
@@ -0,0 +1,38 @@
+From ba59a0812ba0e223bd0af8f4dea6c971b6289696 Mon Sep 17 00:00:00 2001
+From: Anand Gadiyar <gadiyar-l0cyMroinI0@public.gmane.org>
+Date: Thu, 2 Apr 2009 12:07:08 -0700
+Subject: [PATCH] musb: use dma mode 1 for TX if transfer size equals maxpacket (v2)
+
+Currently, with Inventra DMA, we use Mode 0 if transfer size is less
+than or equal to the endpoint's maxpacket size.  This requires that
+we explicitly set TXPKTRDY for that transfer.
+
+However the musb_g_tx code will not set TXPKTRDY twice if the last
+transfer is exactly equal to maxpacket, even if request->zero is set.
+Using Mode 1 will solve this; a better fix might be in musb_g_tx().
+
+Without this change, musb will not correctly send out a ZLP if the
+last transfer is the maxpacket size and request->zero is set.
+
+Signed-off-by: Anand Gadiyar <gadiyar-l0cyMroinI0@public.gmane.org>
+Signed-off-by: David Brownell <dbrownell-Rn4VEauK+AKRv+LV9MX5uipxlwaOVQ5f@public.gmane.org>
+---
+ drivers/usb/musb/musb_gadget.c |    2 +-
+ 1 files changed, 1 insertions(+), 1 deletions(-)
+
+diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c
+index bc197b2..e8f920c 100644
+--- a/drivers/usb/musb/musb_gadget.c
++++ b/drivers/usb/musb/musb_gadget.c
+@@ -310,7 +310,7 @@ static void txstate(struct musb *musb, struct musb_request *req)
+                        /* setup DMA, then program endpoint CSR */
+                        request_size = min(request->length,
+                                                musb_ep->dma->max_len);
+-                       if (request_size <= musb_ep->packet_sz)
++                       if (request_size < musb_ep->packet_sz)
+                                musb_ep->dma->desired_mode = 0;
+                        else
+                                musb_ep->dma->desired_mode = 1;
+-- 
+1.6.0.4
+