Commit f2fc9ff2 authored by Thinh Nguyen's avatar Thinh Nguyen Committed by Greg Kroah-Hartman
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usb: ch9: Add USB 3.2 SSP attributes 



In preparation for USB 3.2 dual-lane support, add sublink speed
attribute macros and enum usb_ssp_rate. A USB device that operates in
SuperSpeed Plus may operate at different speed and lane count. These
additional macros and enum values help specifying that.

Signed-off-by: default avatarThinh Nguyen <Thinh.Nguyen@synopsys.com>
Link: https://lore.kernel.org/r/ae9293ebd63a29f2a2035054753534d9eb123d74.1610592135.git.Thinh.Nguyen@synopsys.com


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 7766cafe

include/linux/usb/ch9.h

+9 −0
Original line number Diff line number Diff line
@@ -36,6 +36,15 @@ 
#include <linux/device.h>

#include <uapi/linux/usb/ch9.h>



/* USB 3.2 SuperSpeed Plus phy signaling rate generation and lane count */



enum usb_ssp_rate {

	USB_SSP_GEN_UNKNOWN = 0,

	USB_SSP_GEN_2x1,

	USB_SSP_GEN_1x2,

	USB_SSP_GEN_2x2,

};



/**

 * usb_ep_type_string() - Returns human readable-name of the endpoint type.

 * @ep_type: The endpoint type to return human-readable name for.  If it's not

include/uapi/linux/usb/ch9.h

+13 −0
Original line number Diff line number Diff line
@@ -968,9 +968,22 @@ struct usb_ssp_cap_descriptor { 
	__le32 bmSublinkSpeedAttr[1]; /* list of sublink speed attrib entries */

#define USB_SSP_SUBLINK_SPEED_SSID	(0xf)		/* sublink speed ID */

#define USB_SSP_SUBLINK_SPEED_LSE	(0x3 << 4)	/* Lanespeed exponent */

#define USB_SSP_SUBLINK_SPEED_LSE_BPS		0

#define USB_SSP_SUBLINK_SPEED_LSE_KBPS		1

#define USB_SSP_SUBLINK_SPEED_LSE_MBPS		2

#define USB_SSP_SUBLINK_SPEED_LSE_GBPS		3



#define USB_SSP_SUBLINK_SPEED_ST	(0x3 << 6)	/* Sublink type */

#define USB_SSP_SUBLINK_SPEED_ST_SYM_RX		0

#define USB_SSP_SUBLINK_SPEED_ST_ASYM_RX	1

#define USB_SSP_SUBLINK_SPEED_ST_SYM_TX		2

#define USB_SSP_SUBLINK_SPEED_ST_ASYM_TX	3



#define USB_SSP_SUBLINK_SPEED_RSVD	(0x3f << 8)	/* Reserved */

#define USB_SSP_SUBLINK_SPEED_LP	(0x3 << 14)	/* Link protocol */

#define USB_SSP_SUBLINK_SPEED_LP_SS		0

#define USB_SSP_SUBLINK_SPEED_LP_SSP		1



#define USB_SSP_SUBLINK_SPEED_LSM	(0xff << 16)	/* Lanespeed mantissa */

} __attribute__((packed));