USB: SS: Add support for Super Speed USB interface

This adds usb framework support for super-speed usb, which will
further facilitate to add stack support for xHCI.

Signed-off-by: Vikas C Sajjan <vikas.sajjan@samsung.com>
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>

common/cmd_usb.c

@@ -287,12 +287,24 @@ static struct usb_device *usb_find_device(int devnum)
 
 static inline char *portspeed(int speed)
 {
-	if (speed == USB_SPEED_HIGH)
-		return "480 Mb/s";
-	else if (speed == USB_SPEED_LOW)
-		return "1.5 Mb/s";
-	else
-		return "12 Mb/s";
+	char *speed_str;
+
+	switch (speed) {
+	case USB_SPEED_SUPER:
+		speed_str = "5 Gb/s";
+		break;
+	case USB_SPEED_HIGH:
+		speed_str = "480 Mb/s";
+		break;
+	case USB_SPEED_LOW:
+		speed_str = "1.5 Mb/s";
+		break;
+	default:
+		speed_str = "12 Mb/s";
+		break;
+	}
+
+	return speed_str;
 }
 
 /* shows the device tree recursively */

common/usb.c

@@ -409,6 +409,11 @@ static int usb_parse_config(struct usb_device *dev,
 					wMaxPacketSize);
 			debug("if %d, ep %d\n", ifno, epno);
 			break;
+		case USB_DT_SS_ENDPOINT_COMP:
+			if_desc = &dev->config.if_desc[ifno];
+			memcpy(&if_desc->ss_ep_comp_desc[epno],
+				&buffer[index], buffer[index]);
+			break;
 		default:
 			if (head->bLength == 0)
 				return 1;

common/usb_hub.c

@@ -165,7 +165,9 @@ static struct usb_hub_device *usb_hub_allocate(void)
 
 static inline char *portspeed(int portstatus)
 {
-	if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
+	if (portstatus & (1 << USB_PORT_FEAT_SUPERSPEED))
+		return "5 Gb/s";
+	else if (portstatus & (1 << USB_PORT_FEAT_HIGHSPEED))
 		return "480 Mb/s";
 	else if (portstatus & (1 << USB_PORT_FEAT_LOWSPEED))
 		return "1.5 Mb/s";
@@ -268,7 +270,9 @@ void usb_hub_port_connect_change(struct usb_device *dev, int port)
 	/* Allocate a new device struct for it */
 	usb = usb_alloc_new_device(dev->controller);
 
-	if (portstatus & USB_PORT_STAT_HIGH_SPEED)
+	if (portstatus & USB_PORT_STAT_SUPER_SPEED)
+		usb->speed = USB_SPEED_SUPER;
+	else if (portstatus & USB_PORT_STAT_HIGH_SPEED)
 		usb->speed = USB_SPEED_HIGH;
 	else if (portstatus & USB_PORT_STAT_LOW_SPEED)
 		usb->speed = USB_SPEED_LOW;

include/usb.h

@@ -76,6 +76,12 @@ struct usb_interface {
 	unsigned char	act_altsetting;
 
 	struct usb_endpoint_descriptor ep_desc[USB_MAXENDPOINTS];
+	/*
+	 * Super Speed Device will have Super Speed Endpoint
+	 * Companion Descriptor  (section 9.6.7 of usb 3.0 spec)
+	 * Revision 1.0 June 6th 2011
+	 */
+	struct usb_ss_ep_comp_descriptor ss_ep_comp_desc[USB_MAXENDPOINTS];
 } __attribute__ ((packed));
 
 /* Configuration information.. */

include/usb_defs.h

@@ -215,6 +215,8 @@
 #define USB_PORT_FEAT_POWER          8
 #define USB_PORT_FEAT_LOWSPEED       9
 #define USB_PORT_FEAT_HIGHSPEED      10
+#define USB_PORT_FEAT_FULLSPEED      11
+#define USB_PORT_FEAT_SUPERSPEED     12
 #define USB_PORT_FEAT_C_CONNECTION   16
 #define USB_PORT_FEAT_C_ENABLE       17
 #define USB_PORT_FEAT_C_SUSPEND      18
@@ -231,8 +233,20 @@
 #define USB_PORT_STAT_POWER         0x0100
 #define USB_PORT_STAT_LOW_SPEED     0x0200
 #define USB_PORT_STAT_HIGH_SPEED    0x0400	/* support for EHCI */
+#define USB_PORT_STAT_FULL_SPEED    0x0800
+#define USB_PORT_STAT_SUPER_SPEED   0x1000	/* support for XHCI */
 #define USB_PORT_STAT_SPEED	\
-	(USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED)
+	(USB_PORT_STAT_LOW_SPEED | USB_PORT_STAT_HIGH_SPEED | \
+	USB_PORT_STAT_FULL_SPEED | USB_PORT_STAT_SUPER_SPEED)
+
+/*
+ * Additions to wPortStatus bit field from USB 3.0
+ * See USB 3.0 spec Table 10-10
+ */
+#define USB_PORT_STAT_LINK_STATE	0x01e0
+#define USB_SS_PORT_STAT_POWER		0x0200
+#define USB_SS_PORT_STAT_SPEED		0x1c00
+#define USB_PORT_STAT_SPEED_5GBPS	0x0000
 
 /* wPortChange bits */
 #define USB_PORT_STAT_C_CONNECTION  0x0001
@@ -241,6 +255,14 @@
 #define USB_PORT_STAT_C_OVERCURRENT 0x0008
 #define USB_PORT_STAT_C_RESET       0x0010
 
+/*
+ * Addition to wPortChange bit fields form USB 3.0
+ * See USB 3.0 spec Table 10-11
+ */
+#define USB_PORT_STAT_C_BH_RESET	0x0020
+#define USB_PORT_STAT_C_LINK_STATE	0x0040
+#define USB_PORT_STAT_C_CONFIG_ERROR	0x0080
+
 /* wHubCharacteristics (masks) */
 #define HUB_CHAR_LPSM               0x0003
 #define HUB_CHAR_COMPOUND           0x0004