diff options
| author | Felipe Balbi <balbi@ti.com> | 2011-12-19 14:57:04 +0400 |
|---|---|---|
| committer | Felipe Balbi <balbi@ti.com> | 2013-03-18 13:17:12 +0400 |
| commit | 49401f4169c0e5a1b38f1a676d6f12eecaf77485 (patch) | |
| tree | 274f68e04c13e7bf959cd7878eb22ffde16813b6 /drivers/usb/gadget/udc-core.c | |
| parent | d1e3d757f7aa91f15db347fc05ffd7ef7f413091 (diff) | |
| download | linux-49401f4169c0e5a1b38f1a676d6f12eecaf77485.tar.xz | |
usb: gadget: introduce gadget state tracking
that's useful information to expose to userland.
Signed-off-by: Felipe Balbi <balbi@ti.com>
Diffstat (limited to 'drivers/usb/gadget/udc-core.c')
| -rw-r--r-- | drivers/usb/gadget/udc-core.c | 23 |
1 files changed, 23 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, |