USB 3.0 Hub Changes

Update the USB core to deal with USB 3.0 hubs.  These hubs have a slightly
different hub descriptor than USB 2.0 hubs, with a fixed (rather than
variable length) size.  Change the USB core's hub descriptor to have a
union for the last fields that differ.  Change the host controller drivers
that access those last fields (DeviceRemovable and PortPowerCtrlMask) to
use the union.

Translate the new version of the hub port status field into the old
version that khubd understands.  (Note: we need to fix it to translate the
roothub's port status once we stop converting it to USB 2.0 hub status
internally.)

Add new code to handle link state change status.  Send out new control
messages that are needed for USB 3.0 hubs, like Set Hub Depth.

This patch is a modified version of the original patch submitted by John
Youn.  It's updated to reflect the removal of the "bitmap" #define, and
change the hub descriptor accesses of a couple new host controller
drivers.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Cc: Tony Olech <tony.olech@elandigitalsystems.com>
Cc: "Robert P. J. Day" <rpjday@crashcourse.ca>
Cc: Max Vozeler <mvz@vozeler.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Cc: Rodolfo Giometti <giometti@linux.it>
Cc: Mike Frysinger <vapier@gentoo.org>
Cc: Anton Vorontsov <avorontsov@mvista.com>
Cc: Sebastian Siewior <bigeasy@linutronix.de>
Cc: Lothar Wassmann <LW@KARO-electronics.de>
Cc: Olav Kongas <ok@artecdesign.ee>
Cc: Martin Fuzzey <mfuzzey@gmail.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: David Brownell <dbrownell@users.sourceforge.net>

1 files changed, 37 insertions, 4 deletions

diff --git a/include/linux/usb/ch11.h b/include/linux/usb/ch11.h
index 38c42b013641..22afcd37bc3f 100644
--- a/include/linux/usb/ch11.h
+++ b/include/linux/usb/ch11.h
@@ -26,6 +26,7 @@
 #define HUB_RESET_TT            9
 #define HUB_GET_TT_STATE        10
 #define HUB_STOP_TT             11
+#define HUB_SET_DEPTH           12
 
 /*
  * Hub class additional requests defined by USB 3.0 spec
@@ -61,6 +62,12 @@
 #define USB_PORT_FEAT_TEST              21
 #define USB_PORT_FEAT_INDICATOR         22
 #define USB_PORT_FEAT_C_PORT_L1         23
+#define USB_PORT_FEAT_C_PORT_LINK_STATE 25
+#define USB_PORT_FEAT_C_PORT_CONFIG_ERROR 26
+#define USB_PORT_FEAT_PORT_REMOTE_WAKE_MASK 27
+#define USB_PORT_FEAT_BH_PORT_RESET     28
+#define USB_PORT_FEAT_C_BH_PORT_RESET   29
+#define USB_PORT_FEAT_FORCE_LINKPM_ACCEPT 30
 
 /*
  * Port feature selectors added by USB 3.0 spec.
@@ -110,8 +117,14 @@ struct usb_port_status {
  */
 #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
 /* Valid only if port is enabled */
+/* Bits that are the same from USB 2.0 */
+#define USB_SS_PORT_STAT_MASK (USB_PORT_STAT_CONNECTION |           \
+                                USB_PORT_STAT_ENABLE |      \
+                                USB_PORT_STAT_OVERCURRENT | \
+                                USB_PORT_STAT_RESET)
 
 /*
  * Definitions for PORT_LINK_STATE values
@@ -141,6 +154,13 @@ struct usb_port_status {
 #define USB_PORT_STAT_C_OVERCURRENT     0x0008
 #define USB_PORT_STAT_C_RESET           0x0010
 #define USB_PORT_STAT_C_L1              0x0020
+/*
+ * USB 3.0 wPortChange bit fields
+ * 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)
@@ -175,7 +195,9 @@ struct usb_hub_status {
  */
 
 #define USB_DT_HUB                      (USB_TYPE_CLASS | 0x09)
+#define USB_DT_SS_HUB                   (USB_TYPE_CLASS | 0x0a)
 #define USB_DT_HUB_NONVAR_SIZE          7
+#define USB_DT_SS_HUB_SIZE              12
 
 struct usb_hub_descriptor {
         __u8  bDescLength;
@@ -184,11 +206,22 @@ struct usb_hub_descriptor {
         __le16 wHubCharacteristics;
         __u8  bPwrOn2PwrGood;
         __u8  bHubContrCurrent;
-                /* add 1 bit for hub status change; round to bytes */
-        __u8  DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
-        __u8  PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
-} __attribute__ ((packed));
 
+        /* 2.0 and 3.0 hubs differ here */
+        union {
+                struct {
+                        /* add 1 bit for hub status change; round to bytes */
+                        __u8  DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
+                        __u8  PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
+                }  __attribute__ ((packed)) hs;
+
+                struct {
+                        __u8 bHubHdrDecLat;
+                        __u16 wHubDelay;
+                        __u16 DeviceRemovable;
+                }  __attribute__ ((packed)) ss;
+        } u;
+} __attribute__ ((packed));
 
 /* port indicator status selectors, tables 11-7 and 11-25 */
 #define HUB_LED_AUTO    0