USB: gadget: f_accessory: New gadget driver for android USB accesories
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Misc improvements and cleanup:
- Add URI string
- Replace type string with a description string
- Add a control call to retrieve accessory protocol version (currently 1)
- Driver read() and write() calls now fail after USB disconnect until
driver file is closed and reopened.
- Misc cleanup work
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Clear accessory strings when USB is disconnected
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Clear previous strings on ACCESSORY_GET_PROTOCOL
Clearing strings on disconnect does not work since we may receive
a disconnect on some devices when transitioning into accessory mode.
We require an accessory to send ACCESSORY_GET_PROTOCOL before
sending any strings, so any strings from a previous session will be cleared.
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Clear disconnected flag when driver file is opened
Fixes a race condition that can occur when entering accessory mode.
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Add string for accessory's unique serial number
Signed-off-by: Mike Lockwood <lockwood@android.com>
USB: gadget: f_accessory: Set bNumEndpoints to correct value of 2
Change-Id: I24f4e36f196d45436e0573301500c3b93215953d
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/drivers/usb/gadget/android.c b/drivers/usb/gadget/android.c
index eb6af6d..2ebc818 100644
--- a/drivers/usb/gadget/android.c
+++ b/drivers/usb/gadget/android.c
@@ -430,6 +430,19 @@
}
}
#endif
+#ifdef CONFIG_USB_ANDROID_ACCESSORY
+ if (!strcmp(f->name, "accessory") && enable) {
+ struct usb_function *func;
+
+ /* disable everything else (and keep adb for now) */
+ list_for_each_entry(func, &android_config_driver.functions, list) {
+ if (strcmp(func->name, "accessory")
+ && strcmp(func->name, "adb")) {
+ usb_function_set_enabled(func, 0);
+ }
+ }
+ }
+#endif
update_dev_desc(dev);