USB: make hub.h public (drivers dependency)

The usbcore headers: hcd.h and hub.h are shared between usbcore,
HCDs and a couple of other drivers (e.g. USBIP modules).
So, it makes sense to move them into a more public location and
to cleanup dependency of those modules on kernel internal headers.
This patch moves hub.h from drivers/usb/core into include/linux/usb/

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, 206 insertions, 1 deletions

diff --git a/include/linux/usb/hcd.h b/include/linux/usb/hcd.h
index c7e575cb3149..ca228f00b826 100644
--- a/include/linux/usb/hcd.h
+++ b/include/linux/usb/hcd.h
@@ -374,7 +374,7 @@ extern void usb_destroy_configuration(struct usb_device *dev);
  * HCD Root Hub support
  */
 
-#include <linux/../../drivers/usb/core/hub.h>
+#include <linux/usb/hub.h>
 
 /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
 #define DeviceRequest \
diff --git a/include/linux/usb/hub.h b/include/linux/usb/hub.h
new file mode 100644
index 000000000000..de8081f065ed
--- /dev/null
+++ b/include/linux/usb/hub.h
@@ -0,0 +1,205 @@
+#ifndef __LINUX_HUB_H
+#define __LINUX_HUB_H
+
+/*
+ * Hub protocol and driver data structures.
+ *
+ * Some of these are known to the "virtual root hub" code
+ * in host controller drivers.
+ */
+
+#include <linux/list.h>
+#include <linux/workqueue.h>
+#include <linux/compiler.h>     /* likely()/unlikely() */
+
+/*
+ * Hub request types
+ */
+
+#define USB_RT_HUB      (USB_TYPE_CLASS | USB_RECIP_DEVICE)
+#define USB_RT_PORT     (USB_TYPE_CLASS | USB_RECIP_OTHER)
+
+/*
+ * Hub class requests
+ * See USB 2.0 spec Table 11-16
+ */
+#define HUB_CLEAR_TT_BUFFER     8
+#define HUB_RESET_TT            9
+#define HUB_GET_TT_STATE        10
+#define HUB_STOP_TT             11
+
+/*
+ * Hub Class feature numbers
+ * See USB 2.0 spec Table 11-17
+ */
+#define C_HUB_LOCAL_POWER       0
+#define C_HUB_OVER_CURRENT      1
+
+/*
+ * Port feature numbers
+ * See USB 2.0 spec Table 11-17
+ */
+#define USB_PORT_FEAT_CONNECTION        0
+#define USB_PORT_FEAT_ENABLE            1
+#define USB_PORT_FEAT_SUSPEND           2       /* L2 suspend */
+#define USB_PORT_FEAT_OVER_CURRENT      3
+#define USB_PORT_FEAT_RESET             4
+#define USB_PORT_FEAT_L1                5       /* L1 suspend */
+#define USB_PORT_FEAT_POWER             8
+#define USB_PORT_FEAT_LOWSPEED          9
+/* This value was never in Table 11-17 */
+#define USB_PORT_FEAT_HIGHSPEED         10
+/* This value is also fake */
+#define USB_PORT_FEAT_SUPERSPEED        11
+#define USB_PORT_FEAT_C_CONNECTION      16
+#define USB_PORT_FEAT_C_ENABLE          17
+#define USB_PORT_FEAT_C_SUSPEND         18
+#define USB_PORT_FEAT_C_OVER_CURRENT    19
+#define USB_PORT_FEAT_C_RESET           20
+#define USB_PORT_FEAT_TEST              21
+#define USB_PORT_FEAT_INDICATOR         22
+#define USB_PORT_FEAT_C_PORT_L1         23
+
+/*
+ * Hub Status and Hub Change results
+ * See USB 2.0 spec Table 11-19 and Table 11-20
+ */
+struct usb_port_status {
+        __le16 wPortStatus;
+        __le16 wPortChange;
+} __attribute__ ((packed));
+
+/*
+ * wPortStatus bit field
+ * See USB 2.0 spec Table 11-21
+ */
+#define USB_PORT_STAT_CONNECTION        0x0001
+#define USB_PORT_STAT_ENABLE            0x0002
+#define USB_PORT_STAT_SUSPEND           0x0004
+#define USB_PORT_STAT_OVERCURRENT       0x0008
+#define USB_PORT_STAT_RESET             0x0010
+#define USB_PORT_STAT_L1                0x0020
+/* bits 6 to 7 are reserved */
+#define USB_PORT_STAT_POWER             0x0100
+#define USB_PORT_STAT_LOW_SPEED         0x0200
+#define USB_PORT_STAT_HIGH_SPEED        0x0400
+#define USB_PORT_STAT_TEST              0x0800
+#define USB_PORT_STAT_INDICATOR         0x1000
+/* bits 13 to 15 are reserved */
+
+/*
+ * wPortChange bit field
+ * See USB 2.0 spec Table 11-22
+ * Bits 0 to 4 shown, bits 5 to 15 are reserved
+ */
+#define USB_PORT_STAT_C_CONNECTION      0x0001
+#define USB_PORT_STAT_C_ENABLE          0x0002
+#define USB_PORT_STAT_C_SUSPEND         0x0004
+#define USB_PORT_STAT_C_OVERCURRENT     0x0008
+#define USB_PORT_STAT_C_RESET           0x0010
+#define USB_PORT_STAT_C_L1              0x0020
+
+/*
+ * wHubCharacteristics (masks)
+ * See USB 2.0 spec Table 11-13, offset 3
+ */
+#define HUB_CHAR_LPSM           0x0003 /* D1 .. D0 */
+#define HUB_CHAR_COMPOUND       0x0004 /* D2       */
+#define HUB_CHAR_OCPM           0x0018 /* D4 .. D3 */
+#define HUB_CHAR_TTTT           0x0060 /* D6 .. D5 */
+#define HUB_CHAR_PORTIND        0x0080 /* D7       */
+
+struct usb_hub_status {
+        __le16 wHubStatus;
+        __le16 wHubChange;
+} __attribute__ ((packed));
+
+/*
+ * Hub Status & Hub Change bit masks
+ * See USB 2.0 spec Table 11-19 and Table 11-20
+ * Bits 0 and 1 for wHubStatus and wHubChange
+ * Bits 2 to 15 are reserved for both
+ */
+#define HUB_STATUS_LOCAL_POWER  0x0001
+#define HUB_STATUS_OVERCURRENT  0x0002
+#define HUB_CHANGE_LOCAL_POWER  0x0001
+#define HUB_CHANGE_OVERCURRENT  0x0002
+
+
+/*
+ * Hub descriptor
+ * See USB 2.0 spec Table 11-13
+ */
+
+#define USB_DT_HUB                      (USB_TYPE_CLASS | 0x09)
+#define USB_DT_HUB_NONVAR_SIZE          7
+
+struct usb_hub_descriptor {
+        __u8  bDescLength;
+        __u8  bDescriptorType;
+        __u8  bNbrPorts;
+        __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));
+
+
+/* port indicator status selectors, tables 11-7 and 11-25 */
+#define HUB_LED_AUTO    0
+#define HUB_LED_AMBER   1
+#define HUB_LED_GREEN   2
+#define HUB_LED_OFF     3
+
+enum hub_led_mode {
+        INDICATOR_AUTO = 0,
+        INDICATOR_CYCLE,
+        /* software blinks for attention:  software, hardware, reserved */
+        INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
+        INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
+        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 */