[ar71xx] add a workaround for the Synopsys EHCI core

 * http://www.mail-archive.com/linux-usb-devel@lists.sourceforge.net/msg45345.html

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15348 3c298f89-4303-0410-b956-a3cf2f4a3e73

diff --git a/target/linux/ar71xx/patches-2.6.28/110-usb-ehci-add-war-for-synopsys-hc-bug.patch b/target/linux/ar71xx/patches-2.6.28/110-usb-ehci-add-war-for-synopsys-hc-bug.patch
new file mode 100644 (file)
index 0000000..3aa2479
--- /dev/null
+++ b/target/linux/ar71xx/patches-2.6.28/110-usb-ehci-add-war-for-synopsys-hc-bug.patch
@@ -0,0 +1,22 @@
+--- a/drivers/usb/host/ehci-q.c
++++ b/drivers/usb/host/ehci-q.c
+@@ -1050,6 +1050,9 @@ static void end_unlink_async (struct ehc
+               ehci->reclaim = NULL;
+               start_unlink_async (ehci, next);
+       }
++
++      if (ehci->has_synopsys_hc_bug)
++              writel((u32)ehci->async->qh_dma, &ehci->regs->async_next);
+ }
+ 
+ /* makes sure the async qh will become idle */
+--- a/drivers/usb/host/ehci.h
++++ b/drivers/usb/host/ehci.h
+@@ -124,6 +124,7 @@ struct ehci_hcd {                  /* one per controlle
+       unsigned                has_fsl_port_bug:1; /* FreeScale */
+       unsigned                big_endian_mmio:1;
+       unsigned                big_endian_desc:1;
++      unsigned                has_synopsys_hc_bug:1; /* Synopsys HC */
+ 
+       u8                      sbrn;           /* packed release number */
+