summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat
-rw-r--r--Documentation/usb/raw-gadget.rst2
-rw-r--r--drivers/usb/gadget/legacy/raw_gadget.c131
-rw-r--r--include/uapi/linux/usb/raw_gadget.h15
3 files changed, 144 insertions, 4 deletions
diff --git a/Documentation/usb/raw-gadget.rst b/Documentation/usb/raw-gadget.rst
index 4af8b1f15574..3b3d78e850b2 100644
--- a/Documentation/usb/raw-gadget.rst
+++ b/Documentation/usb/raw-gadget.rst
@@ -52,8 +52,6 @@ The typical usage of Raw Gadget looks like:
Potential future improvements
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-- Implement ioctl's for setting/clearing halt status on endpoints.
-
- Reporting more events (suspend, resume, etc.) through
USB_RAW_IOCTL_EVENT_FETCH.
diff --git a/drivers/usb/gadget/legacy/raw_gadget.c b/drivers/usb/gadget/legacy/raw_gadget.c
index 775f22184aaf..d73ba77014c8 100644
--- a/drivers/usb/gadget/legacy/raw_gadget.c
+++ b/drivers/usb/gadget/legacy/raw_gadget.c
@@ -204,7 +204,7 @@ static void dev_free(struct kref *kref)
}
raw_event_queue_destroy(&dev->queue);
for (i = 0; i < dev->eps_num; i++) {
- if (dev->eps[i].state != STATE_EP_ENABLED)
+ if (dev->eps[i].state == STATE_EP_DISABLED)
continue;
usb_ep_disable(dev->eps[i].ep);
usb_ep_free_request(dev->eps[i].ep, dev->eps[i].req);
@@ -704,6 +704,50 @@ free:
return ret;
}
+static int raw_ioctl_ep0_stall(struct raw_dev *dev, unsigned long value)
+{
+ int ret = 0;
+ unsigned long flags;
+
+ if (value)
+ return -EINVAL;
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->state != STATE_DEV_RUNNING) {
+ dev_dbg(dev->dev, "fail, device is not running\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+ if (!dev->gadget) {
+ dev_dbg(dev->dev, "fail, gadget is not bound\n");
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+ if (dev->ep0_urb_queued) {
+ dev_dbg(&dev->gadget->dev, "fail, urb already queued\n");
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+ if (!dev->ep0_in_pending && !dev->ep0_out_pending) {
+ dev_dbg(&dev->gadget->dev, "fail, no request pending\n");
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+
+ ret = usb_ep_set_halt(dev->gadget->ep0);
+ if (ret < 0)
+ dev_err(&dev->gadget->dev,
+ "fail, usb_ep_set_halt returned %d\n", ret);
+
+ if (dev->ep0_in_pending)
+ dev->ep0_in_pending = false;
+ else
+ dev->ep0_out_pending = false;
+
+out_unlock:
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return ret;
+}
+
static int raw_ioctl_ep_enable(struct raw_dev *dev, unsigned long value)
{
int ret = 0, i;
@@ -798,7 +842,7 @@ static int raw_ioctl_ep_disable(struct raw_dev *dev, unsigned long value)
ret = -EBUSY;
goto out_unlock;
}
- if (dev->eps[i].state != STATE_EP_ENABLED) {
+ if (dev->eps[i].state == STATE_EP_DISABLED) {
dev_dbg(&dev->gadget->dev, "fail, endpoint is not enabled\n");
ret = -EINVAL;
goto out_unlock;
@@ -832,6 +876,74 @@ out_unlock:
return ret;
}
+static int raw_ioctl_ep_set_clear_halt_wedge(struct raw_dev *dev,
+ unsigned long value, bool set, bool halt)
+{
+ int ret = 0, i = value;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->lock, flags);
+ if (dev->state != STATE_DEV_RUNNING) {
+ dev_dbg(dev->dev, "fail, device is not running\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+ if (!dev->gadget) {
+ dev_dbg(dev->dev, "fail, gadget is not bound\n");
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+ if (i < 0 || i >= dev->eps_num) {
+ dev_dbg(dev->dev, "fail, invalid endpoint\n");
+ ret = -EBUSY;
+ goto out_unlock;
+ }
+ if (dev->eps[i].state == STATE_EP_DISABLED) {
+ dev_dbg(&dev->gadget->dev, "fail, endpoint is not enabled\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+ if (dev->eps[i].disabling) {
+ dev_dbg(&dev->gadget->dev,
+ "fail, disable is in progress\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+ if (dev->eps[i].urb_queued) {
+ dev_dbg(&dev->gadget->dev,
+ "fail, waiting for urb completion\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+ if (usb_endpoint_xfer_isoc(dev->eps[i].ep->desc)) {
+ dev_dbg(&dev->gadget->dev,
+ "fail, can't halt/wedge ISO endpoint\n");
+ ret = -EINVAL;
+ goto out_unlock;
+ }
+
+ if (set && halt) {
+ ret = usb_ep_set_halt(dev->eps[i].ep);
+ if (ret < 0)
+ dev_err(&dev->gadget->dev,
+ "fail, usb_ep_set_halt returned %d\n", ret);
+ } else if (!set && halt) {
+ ret = usb_ep_clear_halt(dev->eps[i].ep);
+ if (ret < 0)
+ dev_err(&dev->gadget->dev,
+ "fail, usb_ep_clear_halt returned %d\n", ret);
+ } else if (set && !halt) {
+ ret = usb_ep_set_wedge(dev->eps[i].ep);
+ if (ret < 0)
+ dev_err(&dev->gadget->dev,
+ "fail, usb_ep_set_wedge returned %d\n", ret);
+ }
+
+out_unlock:
+ spin_unlock_irqrestore(&dev->lock, flags);
+ return ret;
+}
+
static void gadget_ep_complete(struct usb_ep *ep, struct usb_request *req)
{
struct raw_ep *r_ep = (struct raw_ep *)ep->driver_data;
@@ -1128,6 +1240,21 @@ static long raw_ioctl(struct file *fd, unsigned int cmd, unsigned long value)
case USB_RAW_IOCTL_EPS_INFO:
ret = raw_ioctl_eps_info(dev, value);
break;
+ case USB_RAW_IOCTL_EP0_STALL:
+ ret = raw_ioctl_ep0_stall(dev, value);
+ break;
+ case USB_RAW_IOCTL_EP_SET_HALT:
+ ret = raw_ioctl_ep_set_clear_halt_wedge(
+ dev, value, true, true);
+ break;
+ case USB_RAW_IOCTL_EP_CLEAR_HALT:
+ ret = raw_ioctl_ep_set_clear_halt_wedge(
+ dev, value, false, true);
+ break;
+ case USB_RAW_IOCTL_EP_SET_WEDGE:
+ ret = raw_ioctl_ep_set_clear_halt_wedge(
+ dev, value, true, false);
+ break;
default:
ret = -EINVAL;
}
diff --git a/include/uapi/linux/usb/raw_gadget.h b/include/uapi/linux/usb/raw_gadget.h
index c89f6341229c..0be685272eb1 100644
--- a/include/uapi/linux/usb/raw_gadget.h
+++ b/include/uapi/linux/usb/raw_gadget.h
@@ -231,4 +231,19 @@ struct usb_raw_eps_info {
*/
#define USB_RAW_IOCTL_EPS_INFO _IOR('U', 11, struct usb_raw_eps_info)
+/*
+ * Stalls a pending control request on endpoint 0.
+ * Returns 0 on success or negative error code on failure.
+ */
+#define USB_RAW_IOCTL_EP0_STALL _IO('U', 12)
+
+/*
+ * Sets or clears halt or wedge status of the endpoint.
+ * Accepts endpoint handle as an argument.
+ * Returns 0 on success or negative error code on failure.
+ */
+#define USB_RAW_IOCTL_EP_SET_HALT _IOW('U', 13, __u32)
+#define USB_RAW_IOCTL_EP_CLEAR_HALT _IOW('U', 14, __u32)
+#define USB_RAW_IOCTL_EP_SET_WEDGE _IOW('U', 15, __u32)
+
#endif /* _UAPI__LINUX_USB_RAW_GADGET_H */
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-26 04:00:18 +0000