Add usbg_get_udc_gadget() which allows user to learn
which gadget is attached to selected UDC.
Signed-off-by: Krzysztof Opasiak <k.opasiak@xxxxxxxxxxx>
---
include/usbg/usbg.h | 7 +++++++
src/usbg.c | 30 ++++++++++++++++++++++++++++++
2 files changed, 37 insertions(+)
diff --git a/include/usbg/usbg.h b/include/usbg/usbg.h
index 7b0c756..e5a29a8 100644
--- a/include/usbg/usbg.h
+++ b/include/usbg/usbg.h
@@ -825,6 +825,13 @@ extern int usbg_cpy_udc_name(usbg_udc *u, char *buf, size_t len);
*/
extern usbg_udc *usbg_get_gadget_udc(usbg_gadget *g);
+/**
+ * @brief Get gadget which is attached to this UDC
+ * @param u Pointer to udc
+ * @return Pointer to gadget or NULL if UDC is free
+ */
+extern usbg_gadget *usbg_get_udc_gadget(usbg_udc *u);
+
/*
* USB function-specific attribute configuration
*/
diff --git a/src/usbg.c b/src/usbg.c
index 78490c1..d82f1e9 100644
--- a/src/usbg.c
+++ b/src/usbg.c
@@ -1899,6 +1899,36 @@ out:
return u;
}
+usbg_gadget *usbg_get_udc_gadget(usbg_udc *u)
+{
+ char buf[USBG_MAX_STR_LENGTH];
+ int ret;
+ usbg_gadget *g = NULL;
+
+ if (!u)
+ goto out;
+ /*
+ * if gadget was enabled on this UDC we have to check if kernel
+ * didn't modify this due to some errors.
+ * For example some FFS daemon could just get a segmentation fault
+ * what causes detach of gadget
+ */
+ if (u->gadget) {
+ usbg_udc *u_checked;
+
+ u_checked = usbg_get_gadget_udc(u->gadget);
+ if (u_checked) {
+ g = u->gadget;
+ } else {
+ u->gadget->udc = NULL;
+ u->gadget = NULL;
+ }
+ }
+
+out:
+ return g;
+}
+
int usbg_set_gadget_attrs(usbg_gadget *g, usbg_gadget_attrs *g_attrs)
{
int ret;
--
1.7.9.5
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