This patch adds a unified otg_notify function to otg_transceiver data
structure. It is used for USB host/peripheral to notify otg related event
to otg_transceiver.
Signed-off-by: Hao Wu <hao.wu@xxxxxxxxx>
---
include/linux/usb/otg.h | 42 ++++++++++++++++++++++++++++++++++++++++++
1 files changed, 42 insertions(+), 0 deletions(-)
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 0a5b371..97292ab 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -35,6 +35,29 @@ enum usb_otg_state {
OTG_STATE_A_VBUS_ERR,
};
+enum usb_otg_events {
+ /* according to OTG Spec */
+ USB_OTG_CONNECT, /* a_conn/b_conn */
+ USB_OTG_DISCON,
+ USB_OTG_HOST_SUSP, /* bus request */
+ USB_OTG_HOST_RESU,
+ USB_OTG_DEV_SUSP, /* bus suspend/resume event */
+ USB_OTG_DEV_RESU,
+
+ /* others */
+ USB_OTG_HOST_ACTIVE, /* host driver added/active */
+ USB_OTG_HOST_STOP, /* host driver removed/stopped */
+ USB_OTG_DEV_ACTIVE, /* udc driver added/active */
+ USB_OTG_DEV_STOP, /* udc driver removed/stopped */
+
+ /* Battery charging Spec 1.1, requires different charging
+ * current in FullSpeed mode/HighSpeed mode with CDP, in
+ * such case, transceiver needs these events to update the
+ * current limitation */
+ USB_OTG_DEV_FS, /* enter FS */
+ USB_OTG_DEV_HS, /* enter HS */
+};
+
enum usb_xceiv_events {
USB_EVENT_NONE, /* no events or cable disconnected */
USB_EVENT_VBUS, /* vbus valid event */
@@ -110,6 +133,9 @@ struct otg_transceiver {
/* start or continue HNP role switch */
int (*start_hnp)(struct otg_transceiver *otg);
+ /* OTG events notifications to transceiver */
+ int (*otg_notify)(struct otg_transceiver *otg,
+ enum usb_otg_events);
};
@@ -230,6 +256,22 @@ otg_start_srp(struct otg_transceiver *otg)
return otg->start_srp(otg);
}
+static inline int
+otg_notify_event(enum usb_otg_events event)
+{
+ struct otg_transceiver *otg;
+ int retval = 0;
+
+ otg = otg_get_transceiver();
+
+ if (otg && otg->otg_notify)
+ retval = otg->otg_notify(otg, event);
+
+ otg_put_transceiver(otg);
+
+ return retval;
+}
+
/* notifiers */
static inline int
otg_register_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
--
1.6.0.6
--
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