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| author |   Chunfeng Yun <chunfeng.yun@mediatek.com> | 2018-04-24 10:52:49 +0800 |
|---|---|---|
| committer |   Felipe Balbi <felipe.balbi@linux.intel.com> | 2018-05-15 10:15:07 +0300 |
| commit | f3b28e5e07ef5feaa0071050d14d5b6e6cb68060 (patch) | |
| tree | 1780621b7ad909c6d08d17155a01bbd94ea6f7c4 /drivers/usb/mtu3 | |
| parent | usb: mtu3: fix an unrecognized issue when connected with PC (diff) | |
| download | linux-dev-f3b28e5e07ef5feaa0071050d14d5b6e6cb68060.tar.xz linux-dev-f3b28e5e07ef5feaa0071050d14d5b6e6cb68060.zip | |
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')
| -rw-r--r-- | drivers/usb/mtu3/mtu3_gadget_ep0.c | 10 |
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; |