USB: gadget: Implement remote wakeup in ci13xxx_udc

This patch adds support for remote wakeup.  The following things
are handled:

- Process SET_FEATURE/CLEAR_FEATURE control requests sent by host
for enabling/disabling remote wakeup feature.
- Report remote wakeup enable status in response to GET_STATUS
control request.
- Implement wakeup method defined in usb_gadget_ops for initiating
remote wakeup.
- Notify gadget driver about suspend and resume.

Signed-off-by: Pavankumar Kondeti <pkondeti@codeaurora.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/usb/gadget/ci13xxx_udc.h b/drivers/usb/gadget/ci13xxx_udc.h
index 3fad3adeacc8..6cfab20db6bd 100644
--- a/drivers/usb/gadget/ci13xxx_udc.h
+++ b/drivers/usb/gadget/ci13xxx_udc.h
@@ -128,6 +128,9 @@ struct ci13xxx {
         u32                        ep0_dir;    /* ep0 direction */
 #define ep0out ci13xxx_ep[0]
 #define ep0in  ci13xxx_ep[16]
+        u8                         remote_wakeup; /* Is remote wakeup feature
+                                                        enabled by the host? */
+        u8                         suspended;  /* suspended by the host */
 
         struct usb_gadget_driver  *driver;     /* 3rd party gadget driver */
         struct ci13xxx_udc_driver *udc_driver; /* device controller driver */
@@ -169,6 +172,7 @@ struct ci13xxx {
 #define DEVICEADDR_USBADR     (0x7FUL << 25)
 
 /* PORTSC */
+#define PORTSC_FPR            BIT(6)
 #define PORTSC_SUSP           BIT(7)
 #define PORTSC_HSP            BIT(9)
 #define PORTSC_PTC            (0x0FUL << 16)