This patch adds host request flag in usb_gadget and clears it when leaves
host state in OTG fsm driver, which will be set in gadget driver if the
peripheral wishes to become host.
Signed-off-by: Li Jun <b47624@xxxxxxxxxxxxx>
---
drivers/usb/phy/phy-fsm-usb.c | 4 ++++
include/linux/usb/gadget.h | 1 +
include/linux/usb/otg-fsm.h | 7 +++++++
3 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c
index ef91961..293f35f 100644
--- a/drivers/usb/phy/phy-fsm-usb.c
+++ b/drivers/usb/phy/phy-fsm-usb.c
@@ -84,6 +84,8 @@ static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
fsm->b_ase0_brst_tmout = 0;
break;
case OTG_STATE_B_HOST:
+ if (fsm->otg->gadget)
+ fsm->otg->gadget->host_request_flag = 0;
break;
case OTG_STATE_A_IDLE:
fsm->adp_prb = 0;
@@ -98,6 +100,8 @@ static void otg_leave_state(struct otg_fsm *fsm, enum usb_otg_state old_state)
break;
case OTG_STATE_A_HOST:
otg_del_timer(fsm, A_WAIT_ENUM);
+ if (fsm->otg->gadget)
+ fsm->otg->gadget->host_request_flag = 0;
break;
case OTG_STATE_A_SUSPEND:
otg_del_timer(fsm, A_AIDL_BDIS);
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index c3a6185..3b17e99 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -562,6 +562,7 @@ struct usb_gadget {
unsigned b_hnp_enable:1;
unsigned a_hnp_support:1;
unsigned a_alt_hnp_support:1;
+ unsigned host_request_flag:1;
unsigned quirk_ep_out_aligned_size:1;
};
#define work_to_gadget(w) (container_of((w), struct usb_gadget, work))
diff --git a/include/linux/usb/otg-fsm.h b/include/linux/usb/otg-fsm.h
index 79c6ee8..c38616e 100644
--- a/include/linux/usb/otg-fsm.h
+++ b/include/linux/usb/otg-fsm.h
@@ -40,6 +40,13 @@
#define PROTO_HOST (1)
#define PROTO_GADGET (2)
+#define OTG_STS_SELECTOR 0xF000 /* OTG status selector, according to
+ * OTG and EH 2.0 Charpter 6.2.3
+ * Table:6-4 */
+#define HOST_REQUEST_FLAG 1 /* Host request flag, according to
+ * OTG and EH 2.0 Charpter 6.2.3
+ * Table:6-5 */
+
enum otg_fsm_timer {
/* Standard OTG timers */
A_WAIT_VRISE,
--
1.7.8
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