A USB device controller operating in SuperSpeed Plus may support gen2x1,
gen1x2, and/or gen2x2. Introduce SuperSpeed Plus signaling rate
generation and lane count to usb_gadget with the fields ssp_rate and
max_ssp_rate. The gadget driver can use these to setup the device BOS
descriptor and select the desire operating speed and number of lanes.
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
---
Changes in v6:
- Rebase on Greg's usb-testing branch
- Remove all the sublink speed fields and use only usb_ssp_rate enums
- Update commit message
Changes in v5:
- Rebase on Felipe's testing/next branch
- Changed Signed-off-by email to match From: email header
Changes in v4:
- Change unsigned fields to unsigned int
Changes in v3:
- None
Changes in v2:
- None
include/linux/usb/gadget.h | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/include/linux/usb/gadget.h b/include/linux/usb/gadget.h
index e7351d64f11f..02483c862444 100644
--- a/include/linux/usb/gadget.h
+++ b/include/linux/usb/gadget.h
@@ -339,6 +339,10 @@ 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.
+ * @ssp_rate: Current connected SuperSpeed Plus signaling rate and lane count.
+ * @max_ssp_rate: Maximum SuperSpeed Plus signaling rate and lane count the UDC
+ * can handle. The UDC must support this and all slower speeds and lower
+ * number of lanes.
* @state: the state we are now (attached, suspended, configured, etc)
* @name: Identifies the controller hardware type. Used in diagnostics
* and sometimes configuration.
@@ -406,6 +410,11 @@ struct usb_gadget {
struct list_head ep_list; /* of usb_ep */
enum usb_device_speed speed;
enum usb_device_speed max_speed;
+
+ /* USB SuperSpeed Plus only */
+ enum usb_ssp_rate ssp_rate;
+ enum usb_ssp_rate max_ssp_rate;
+
enum usb_device_state state;
const char *name;
struct device dev;
--
2.28.0
