USB: split hub.h into ch11.h and merge-in hcd.h

Base on inputs from Alan Stern, split the hub.h header into:
- new ch11.h header (most of it) containing constants and
  structures from chapter 11 of the USB 2.0 spec.
- a small remaining part being merged into hcd.h.

Signed-of-by: Eric Lescouet <eric@lescouet.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2 files changed, 43 insertions, 41 deletions

diff --git a/include/linux/usb/hub.h b/include/linux/usb/ch11.h
index de8081f065ed..35cb7357ff72 100644
--- a/include/linux/usb/hub.h
+++ b/include/linux/usb/ch11.h
@@ -1,13 +1,14 @@
-#ifndef __LINUX_HUB_H
-#define __LINUX_HUB_H
-
 /*
- * Hub protocol and driver data structures.
+ * This file holds Hub protocol constants and data structures that are
+ * defined in chapter 11 (Hub Specification) of the USB 2.0 specification.
  *
- * Some of these are known to the "virtual root hub" code
- * in host controller drivers.
+ * It is used/shared between the USB core, the HCDs and couple of other USB
+ * drivers.
  */
 
+#ifndef __LINUX_HUB_H
+#define __LINUX_HUB_H
+
 #include <linux/list.h>
 #include <linux/workqueue.h>
 #include <linux/compiler.h>     /* likely()/unlikely() */
@@ -162,44 +163,10 @@ enum hub_led_mode {
         INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
 } __attribute__ ((packed));
 
-struct usb_device;
-
 /* Transaction Translator Think Times, in bits */
 #define HUB_TTTT_8_BITS         0x00
 #define HUB_TTTT_16_BITS        0x20
 #define HUB_TTTT_24_BITS        0x40
 #define HUB_TTTT_32_BITS        0x60
 
-/*
- * As of USB 2.0, full/low speed devices are segregated into trees.
- * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
- * The other type grows from high speed hubs when they connect to
- * full/low speed devices using "Transaction Translators" (TTs).
- *
- * TTs should only be known to the hub driver, and high speed bus
- * drivers (only EHCI for now).  They affect periodic scheduling and
- * sometimes control/bulk error recovery.
- */
-struct usb_tt {
-        struct usb_device       *hub;   /* upstream highspeed hub */
-        int                     multi;  /* true means one TT per port */
-        unsigned                think_time;     /* think time in ns */
-
-        /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
-        spinlock_t              lock;
-        struct list_head        clear_list;     /* of usb_tt_clear */
-        struct work_struct      clear_work;
-};
-
-struct usb_tt_clear {
-        struct list_head        clear_list;
-        unsigned                tt;
-        u16                     devinfo;
-        struct usb_hcd          *hcd;
-        struct usb_host_endpoint        *ep;
-};
-
-extern int usb_hub_clear_tt_buffer(struct urb *urb);
-extern void usb_ep0_reinit(struct usb_device *);
-
 #endif /* __LINUX_HUB_H */
diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index ca228f00b826..d268415b7a40 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -374,7 +374,42 @@ extern void usb_destroy_configuration(struct usb_device *dev);
  * HCD Root Hub support
  */
 
-#include <linux/usb/hub.h>
+#include <linux/usb/ch11.h>
+
+/*
+ * As of USB 2.0, full/low speed devices are segregated into trees.
+ * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
+ * The other type grows from high speed hubs when they connect to
+ * full/low speed devices using "Transaction Translators" (TTs).
+ *
+ * TTs should only be known to the hub driver, and high speed bus
+ * drivers (only EHCI for now).  They affect periodic scheduling and
+ * sometimes control/bulk error recovery.
+ */
+
+struct usb_device;
+
+struct usb_tt {
+        struct usb_device       *hub;   /* upstream highspeed hub */
+        int                     multi;  /* true means one TT per port */
+        unsigned                think_time;     /* think time in ns */
+
+        /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
+        spinlock_t              lock;
+        struct list_head        clear_list;     /* of usb_tt_clear */
+        struct work_struct      clear_work;
+};
+
+struct usb_tt_clear {
+        struct list_head        clear_list;
+        unsigned                tt;
+        u16                     devinfo;
+        struct usb_hcd          *hcd;
+        struct usb_host_endpoint        *ep;
+};
+
+extern int usb_hub_clear_tt_buffer(struct urb *urb);
+extern void usb_ep0_reinit(struct usb_device *);
 
 /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
 #define DeviceRequest \