diff options
| -rw-r--r-- | drivers/usb/gadget/udc-core.c | 23 | ||||
| -rw-r--r-- | include/linux/usb/gadget.h | 9 |
2 files changed, 32 insertions, 0 deletions
diff --git a/drivers/usb/gadget/udc-core.c b/drivers/usb/gadget/udc-core.c index 40b1d888d5a1..8a1eeb24ae6a 100644 --- a/drivers/usb/gadget/udc-core.c +++ b/drivers/usb/gadget/udc-core.c @@ -101,6 +101,16 @@ 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 @@ -197,6 +207,8 @@ int usb_add_gadget_udc(struct device *parent, struct usb_gadget *gadget) if (ret) goto err4; + usb_gadget_set_state(gadget, USB_STATE_NOTATTACHED); + mutex_unlock(&udc_lock); return 0; @@ -406,6 +418,16 @@ 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 sprintf(buf, "%s\n", usb_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) \ @@ -439,6 +461,7 @@ 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 2e297e80d59a..32b734d88d6b 100644 --- a/include/linux/usb/gadget.h +++ b/include/linux/usb/gadget.h @@ -482,6 +482,7 @@ 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 +526,7 @@ 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 +961,13 @@ extern void usb_gadget_unmap_request(struct usb_gadget *gadget, /*-------------------------------------------------------------------------*/ +/* utility to set gadget state 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 *, |