USB: gadget: f_accessory: Add ioctl to detect USB accessory attached at boot
Signed-off-by: Mike Lockwood <lockwood@android.com>
diff --git a/drivers/usb/gadget/f_accessory.c b/drivers/usb/gadget/f_accessory.c
index 873ab2e..05e65e5 100644
--- a/drivers/usb/gadget/f_accessory.c
+++ b/drivers/usb/gadget/f_accessory.c
@@ -75,6 +75,9 @@
/* for acc_complete_set_string */
int string_index;
+ /* set to 1 if we have a pending start request */
+ int start_requested;
+
/* synchronize access to our device file */
atomic_t open_excl;
@@ -505,6 +508,8 @@
case ACCESSORY_GET_STRING_SERIAL:
src = dev->serial;
break;
+ case ACCESSORY_IS_START_REQUESTED:
+ return dev->start_requested;
}
if (!src)
return -EINVAL;
@@ -572,6 +577,7 @@
if (b_requestType == (USB_DIR_OUT | USB_TYPE_VENDOR)) {
if (b_request == ACCESSORY_START) {
+ dev->start_requested = 1;
schedule_delayed_work(
&dev->work, msecs_to_jiffies(10));
value = 0;
@@ -593,6 +599,7 @@
memset(dev->version, 0, sizeof(dev->version));
memset(dev->uri, 0, sizeof(dev->uri));
memset(dev->serial, 0, sizeof(dev->serial));
+ dev->start_requested = 0;
}
}
@@ -624,6 +631,8 @@
DBG(cdev, "acc_function_bind dev: %p\n", dev);
+ dev->start_requested = 0;
+
/* allocate interface ID(s) */
id = usb_interface_id(c, f);
if (id < 0)