This is the a_set_b_hnp_enable flag in the OTG state machine
diagram and must be set when the A-Host has successfully set
the b_hnp_enable feature of the OTG-B-Peripheral attached to it.
When this bit changes we kick our OTG FSM to make note of the
change and act accordingly.
Signed-off-by: Roger Quadros <rogerq@xxxxxx>
---
drivers/usb/core/hub.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/core/hub.c b/drivers/usb/core/hub.c
index d7c3d5a..ab0d498 100644
--- a/drivers/usb/core/hub.c
+++ b/drivers/usb/core/hub.c
@@ -22,6 +22,7 @@
#include <linux/usb/hcd.h>
#include <linux/usb/otg.h>
#include <linux/usb/quirks.h>
+#include <linux/usb/usb-otg.h>
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/random.h>
@@ -2270,6 +2271,9 @@ static int usb_enumerate_device_otg(struct usb_device *udev)
"can't set HNP mode: %d\n",
err);
bus->b_hnp_enable = 0;
+ } else {
+ /* notify OTG fsm about a_set_b_hnp_enable */
+ usb_otg_kick_fsm(udev->bus->controller);
}
}
}
@@ -4244,8 +4248,13 @@ hub_port_init (struct usb_hub *hub, struct usb_device *udev, int port1,
*/
if (!hdev->parent) {
delay = HUB_ROOT_RESET_TIME;
- if (port1 == hdev->bus->otg_port)
+ if (port1 == hdev->bus->otg_port) {
hdev->bus->b_hnp_enable = 0;
+#ifdef CONFIG_USB_OTG
+ /* notify OTG fsm about a_set_b_hnp_enable change */
+ usb_otg_kick_fsm(hdev->bus->controller);
+#endif
+ }
}
/* Some low speed devices have problems with the quick delay, so */
--
2.1.0
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