usb: gadget: f_dfu: Add get_alt function to pass the USB compliance test
Without this function the USB compliance test (USB 2.0 Command Verifier) will
fail in the "Interface Descriptor Test" with this error message:
FAIL
(1.2.51) A successful GetInterface request must return the alternate setting
set by a prior call to SetInterface.
Lets add this function to read back the value so that the DFU device fully
passes the USB compliance test.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Roger Meier <r.meier@siemens.com>
Cc: Samuel Egli <samuel.egli@siemens.com>
Cc: Enrico Leto <enrico.leto@siemens.com>
Acked-by: Heiko Schocher <hs@denx.de>
Cc: Lukasz Majewski <l.majewski@samsung.com>
Cc: Marek Vasut <marex@denx.de>
diff --git a/drivers/usb/gadget/f_dfu.c b/drivers/usb/gadget/f_dfu.c
index ead71eb..77a1567 100644
--- a/drivers/usb/gadget/f_dfu.c
+++ b/drivers/usb/gadget/f_dfu.c
@@ -780,6 +780,13 @@
return 0;
}
+static int __dfu_get_alt(struct usb_function *f, unsigned intf)
+{
+ struct f_dfu *f_dfu = func_to_dfu(f);
+
+ return f_dfu->altsetting;
+}
+
/* TODO: is this really what we need here? */
static void dfu_disable(struct usb_function *f)
{
@@ -806,6 +813,7 @@
f_dfu->usb_function.bind = dfu_bind;
f_dfu->usb_function.unbind = dfu_unbind;
f_dfu->usb_function.set_alt = dfu_set_alt;
+ f_dfu->usb_function.get_alt = __dfu_get_alt;
f_dfu->usb_function.disable = dfu_disable;
f_dfu->usb_function.strings = dfu_generic_strings;
f_dfu->usb_function.setup = dfu_handle;