that's useful information to expose to userland.
NYET-Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/gadget/udc-core.c | 52 +++++++++++++++++++++++++++++++++++++++++++
include/linux/usb/gadget.h | 11 +++++++++
2 files changed, 63 insertions(+)
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c
index b6c9110..15e484f 100644
--- a/drivers/usb/gadget/udc-core.c
+++ b/drivers/usb/gadget/udc-core.c
@@ -27,6 +27,8 @@
#include <linux/usb/ch9.h>
#include <linux/usb/gadget.h>
+#include <uapi/linux/usb/ch9.h>
+
/**
* struct usb_udc - describes one usb device controller
* @driver - the gadget driver pointer. For use by the class code
@@ -50,6 +52,34 @@ static DEFINE_MUTEX(udc_lock);
/* ------------------------------------------------------------------------- */
+static const char *usb_device_state_string(enum usb_device_state state)
+{
+ switch(state) {
+ case USB_STATE_NOTATTACHED:
+ return "not attached";
+ case USB_STATE_ATTACHED:
+ return "attached";
+ case USB_STATE_POWERED:
+ return "powered";
+ case USB_STATE_RECONNECTING:
+ return "reconnecting";
+ case USB_STATE_UNAUTHENTICATED:
+ return "unauthenticated";
+ case USB_STATE_DEFAULT:
+ return "default";
+ case USB_STATE_ADDRESS:
+ return "addresssed";
+ case USB_STATE_CONFIGURED:
+ return "configured";
+ case USB_STATE_SUSPENDED:
+ return "suspended";
+ default:
+ return "UNKNOWN";
+ }
+}
+
+/* ------------------------------------------------------------------------- */
+
int usb_gadget_map_request(struct usb_gadget *gadget,
struct usb_request *req, int is_in)
{
@@ -101,6 +131,16 @@ EXPORT_SYMBOL_GPL(usb_gadget_unmap_request);
/* ------------------------------------------------------------------------- */
+void usb_gadget_set_state(struct usb_gadget *gadget,
+ enum usb_device_state state)
+{
+ gadget->state = state;
+ sysfs_notify(&gadget->dev.kobj, NULL, "status");
+}
+EXPORT_SYMBOL_GPL(usb_gadget_set_state);
+
+/* ------------------------------------------------------------------------- */
+
/**
* usb_gadget_udc_start - tells usb device controller to start up
* @gadget: The gadget we want to get started
@@ -407,6 +447,17 @@ static ssize_t usb_udc_softconn_store(struct device *dev,
}
static DEVICE_ATTR(soft_connect, S_IWUSR, NULL, usb_udc_softconn_store);
+static ssize_t usb_gadget_state_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct usb_udc *udc = container_of(dev, struct usb_udc, dev);
+ struct usb_gadget *gadget = udc->gadget;
+
+ return snprintf(buf, PAGE_SIZE, "%s\n",
+ usb_device_state_string(gadget->state));
+}
+static DEVICE_ATTR(state, S_IRUGO, usb_gadget_state_show, NULL);
+
#define USB_UDC_SPEED_ATTR(name, param) \
ssize_t usb_udc_##param##_show(struct device *dev, \
struct device_attribute *attr, char *buf) \
@@ -440,6 +491,7 @@ static USB_UDC_ATTR(a_alt_hnp_support);
static struct attribute *usb_udc_attrs[] = {
&dev_attr_srp.attr,
&dev_attr_soft_connect.attr,
+ &dev_attr_state.attr,
&dev_attr_current_speed.attr,
&dev_attr_maximum_speed.attr,
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index 2e297e8..e8a24de 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -24,6 +24,8 @@
#include <linux/types.h>
#include <linux/usb/ch9.h>
+#include <uapi/linux/usb/ch9.h>
+
struct usb_ep;
/**
@@ -482,6 +484,7 @@ struct usb_gadget_ops {
* @speed: Speed of current connection to USB host.
* @max_speed: Maximal speed the UDC can handle. UDC must support this
* and all slower speeds.
+ * @state: the state we are now (attached, suspended, configured, etc)
* @sg_supported: true if we can handle scatter-gather
* @is_otg: True if the USB device port uses a Mini-AB jack, so that the
* gadget driver must provide a USB OTG descriptor.
@@ -525,6 +528,7 @@ struct usb_gadget {
struct list_head ep_list; /* of usb_ep */
enum usb_device_speed speed;
enum usb_device_speed max_speed;
+ enum usb_device_state state;
unsigned sg_supported:1;
unsigned is_otg:1;
unsigned is_a_peripheral:1;
@@ -959,6 +963,13 @@ extern void usb_gadget_unmap_request(struct usb_gadget *gadget,
/*-------------------------------------------------------------------------*/
+/* utility to set gadget status properly */
+
+extern void usb_gadget_set_state(struct usb_gadget *gadget,
+ enum usb_device_state state);
+
+/*-------------------------------------------------------------------------*/
+
/* utility wrapping a simple endpoint selection policy */
extern struct usb_ep *usb_ep_autoconfig(struct usb_gadget *,
--
1.8.1.rc1.5.g7e0651a
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