summaryrefslogtreecommitdiff
path: root/drivers/usb/mtu3/mtu3_gadget_ep0.c
diff options
context:
space:
mode:
authorChunfeng Yun <chunfeng.yun@mediatek.com>2018-04-24 05:52:49 +0300
committerFelipe Balbi <felipe.balbi@linux.intel.com>2018-05-15 10:15:07 +0300
commitf3b28e5e07ef5feaa0071050d14d5b6e6cb68060 (patch)
tree1780621b7ad909c6d08d17155a01bbd94ea6f7c4 /drivers/usb/mtu3/mtu3_gadget_ep0.c
parent11254eb2def5e1556dbe97da58af3e76a0d5e8d7 (diff)
downloadlinux-f3b28e5e07ef5feaa0071050d14d5b6e6cb68060.tar.xz
usb: mtu3: fix operation failure when test TEST_J/K
There is an error dialog popped up in PC when test TEST_J/K by EHSETT tool, due to not waiting for the completion of control transfer. Here fix it by entering test mode after Status Stage finish. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Diffstat (limited to 'drivers/usb/mtu3/mtu3_gadget_ep0.c')
-rw-r--r--drivers/usb/mtu3/mtu3_gadget_ep0.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c
index d67b54099562..0d2b1cf1d5ea 100644
--- a/drivers/usb/mtu3/mtu3_gadget_ep0.c
+++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c
@@ -7,6 +7,7 @@
* Author: Chunfeng.Yun <chunfeng.yun@mediatek.com>
*/
+#include <linux/iopoll.h>
#include <linux/usb/composite.h>
#include "mtu3.h"
@@ -263,6 +264,7 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup)
{
void __iomem *mbase = mtu->mac_base;
int handled = 1;
+ u32 value;
switch (le16_to_cpu(setup->wIndex) >> 8) {
case TEST_J:
@@ -292,6 +294,14 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup)
if (mtu->test_mode_nr == TEST_PACKET_MODE)
ep0_load_test_packet(mtu);
+ /* send status before entering test mode. */
+ value = mtu3_readl(mbase, U3D_EP0CSR) & EP0_W1C_BITS;
+ mtu3_writel(mbase, U3D_EP0CSR, value | EP0_SETUPPKTRDY | EP0_DATAEND);
+
+ /* wait for ACK status sent by host */
+ readl_poll_timeout(mbase + U3D_EP0CSR, value,
+ !(value & EP0_DATAEND), 100, 5000);
+
mtu3_writel(mbase, U3D_USB2_TEST_MODE, mtu->test_mode_nr);
mtu->ep0_state = MU3D_EP0_STATE_SETUP;