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Subject[PATCH] mtu3: fix setup packet response for HNP and SRP request
Date
1. Add OTG_HNP_REQD and OTG_SRP_REQD definitions in ch9.h.
2. When OTG_HNP_REQD and OTG_SRP_REQD has been received,
usb hardware must not enter TEST mode but need to response setup packet.
3. Add otg_srp_reqd and otg_hnp_reqd in struct ssusb_mtk for futher
implementation.

Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
---
drivers/usb/mtu3/mtu3.h | 4 ++++
drivers/usb/mtu3/mtu3_gadget_ep0.c | 13 +++++++++++++
include/uapi/linux/usb/ch9.h | 5 +++++
3 files changed, 22 insertions(+)

diff --git a/drivers/usb/mtu3/mtu3.h b/drivers/usb/mtu3/mtu3.h
index 76ecf12fdf62..bb8a31bc6e4d 100644
--- a/drivers/usb/mtu3/mtu3.h
+++ b/drivers/usb/mtu3/mtu3.h
@@ -226,6 +226,8 @@ struct otg_switch_mtk {
* @dma_clk: dma_bus_ck clock for AXI bus etc
* @dr_mode: works in which mode:
* host only, device only or dual-role mode
+ * @otg_srp_reqd: used for SRP request handling.
+ * @otg_hnp_reqd: used for HNP request handling.
* @u2_ports: number of usb2.0 host ports
* @u3_ports: number of usb3.0 host ports
* @u3p_dis_msk: mask of disabling usb3 ports, for example, bit0==1 to
@@ -252,6 +254,8 @@ struct ssusb_mtk {
/* otg */
struct otg_switch_mtk otg_switch;
enum usb_dr_mode dr_mode;
+ bool otg_srp_reqd;
+ bool otg_hnp_reqd;
bool is_host;
int u2_ports;
int u3_ports;
diff --git a/drivers/usb/mtu3/mtu3_gadget_ep0.c b/drivers/usb/mtu3/mtu3_gadget_ep0.c
index 4da216c99726..1247c43a63e6 100644
--- a/drivers/usb/mtu3/mtu3_gadget_ep0.c
+++ b/drivers/usb/mtu3/mtu3_gadget_ep0.c
@@ -285,11 +285,24 @@ static int handle_test_mode(struct mtu3 *mtu, struct usb_ctrlrequest *setup)
dev_dbg(mtu->dev, "TEST_PACKET\n");
mtu->test_mode_nr = TEST_PACKET_MODE;
break;
+ case OTG_SRP_REQD:
+ dev_dbg(mtu->dev, "OTG_SRP_REQD\n");
+ mtu->ssusb->otg_srp_reqd = 1;
+ break;
+ case OTG_HNP_REQD:
+ dev_dbg(mtu->dev, "OTG_HNP_REQD\n");
+ mtu->ssusb->otg_hnp_reqd = 1;
+ break;
default:
handled = -EINVAL;
goto out;
}

+ if (mtu->ssusb->otg_srp_reqd || mtu->ssusb->otg_hnp_reqd) {
+ mtu->ep0_state = MU3D_EP0_STATE_SETUP;
+ goto out;
+ }
+
mtu->test_mode = true;

/* no TX completion interrupt, and need restart platform after test */
diff --git a/include/uapi/linux/usb/ch9.h b/include/uapi/linux/usb/ch9.h
index d5a5caec8fbc..545918c83fd1 100644
--- a/include/uapi/linux/usb/ch9.h
+++ b/include/uapi/linux/usb/ch9.h
@@ -143,6 +143,11 @@
#define TEST_SE0_NAK 3
#define TEST_PACKET 4
#define TEST_FORCE_EN 5
+/*
+ * OTG HNP and SRP REQD
+ */
+#define OTG_SRP_REQD 6
+#define OTG_HNP_REQD 7

/* Status Type */
#define USB_STATUS_TYPE_STANDARD 0
--
2.18.0
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