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usb: gadget: Introduce SSP rates and lanes

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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@synopsys.com>
Link: https://lore.kernel.org/r/b6d2196dcc3c73747f91abf9a082b20bbe276cc4.1610592135.git.Thinh.Nguyen@synopsys.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thinh Nguyen
2021-01-13 18:53:00 -08:00
committed by Greg Kroah-Hartman
parent 121fc3ac2f
commit db615c6264
1 changed files with 9 additions and 0 deletions
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9
include/linux/usb/gadget.h
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@@ -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;