[PATCH] USB: wireless usb <linux/usb_ch9.h> declarations

This provides declarations for new requests, descriptors, and bitfields as
defined in the Wireless USB 1.0 spec.  Device support will involve a new
"Wire Adapter" device class, connecting a USB Host to a cluster of wireless
USB devices.  There will be two adapter types:

  * Host Wireless Adapter (HWA):  the downstream link is wireless, which
    connects a wireless USB host to wireless USB devices (not unlike like
    a hub) including to the second type of adapter.

  * Device Wireless Adapter (DWA): the upstream link is wireless, for
    connecting existing USB devices through wired links into the cluser.

All wireless USB devices will need persistent (and secure!) key storage, and
it's probable that Linux -- or device firmware -- will need to be involved
with that to bootstrap the initial secure key exchange.

Some user interface is required in that initial key exchange, and since the
most "hands-off" one is a wired USB link, I suspect wireless operation will
usually not be the only mode for wireless USB devices.  (Plus, devices can
recharge batteries using wired USB...)  All other key exchange protocols need
error prone user interactions, like copying and/or verifying keys.

It'll likely be a while before we have commercial Wireless USB hardware,
much less Linux implementations that know how to use it.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/include/linux/usb_ch9.h b/include/linux/usb_ch9.h
index f5fe94e09a033fbf5ebba0ac167c9bc2fc22f65a..39e7ff4ffd28cb581a9f98a38e19e41e2c58a4fa 100644 (file)
--- a/include/linux/usb_ch9.h
+++ b/include/linux/usb_ch9.h
@@ -6,11 +6,14 @@
  *
  * - the master/host side Linux-USB kernel driver API;
  * - the "usbfs" user space API; and
- * - (eventually) a Linux "gadget" slave/device side driver API.
+ * - the Linux "gadget" slave/device/peripheral side driver API.
  *
  * USB 2.0 adds an additional "On The Go" (OTG) mode, which lets systems
  * act either as a USB master/host or as a USB slave/device.  That means
- * the master and slave side APIs will benefit from working well together.
+ * the master and slave side APIs benefit from working well together.
+ *
+ * There's also "Wireless USB", using low power short range radios for
+ * peripheral interconnection but otherwise building on the USB framework.
  */
 
 #ifndef __LINUX_USB_CH9_H
@@ -68,6 +71,18 @@
 #define USB_REQ_SET_INTERFACE          0x0B
 #define USB_REQ_SYNCH_FRAME            0x0C
 
+#define USB_REQ_SET_ENCRYPTION         0x0D    /* Wireless USB */
+#define USB_REQ_GET_ENCRYPTION         0x0E
+#define USB_REQ_SET_HANDSHAKE          0x0F
+#define USB_REQ_GET_HANDSHAKE          0x10
+#define USB_REQ_SET_CONNECTION         0x11
+#define USB_REQ_SET_SECURITY_DATA      0x12
+#define USB_REQ_GET_SECURITY_DATA      0x13
+#define USB_REQ_SET_WUSB_DATA          0x14
+#define USB_REQ_LOOPBACK_DATA_WRITE    0x15
+#define USB_REQ_LOOPBACK_DATA_READ     0x16
+#define USB_REQ_SET_INTERFACE_DS       0x17
+
 /*
  * USB feature flags are written using USB_REQ_{CLEAR,SET}_FEATURE, and
  * are read as a bit array returned by USB_REQ_GET_STATUS.  (So there
@@ -75,10 +90,12 @@
  */
 #define USB_DEVICE_SELF_POWERED                0       /* (read only) */
 #define USB_DEVICE_REMOTE_WAKEUP       1       /* dev may initiate wakeup */
-#define USB_DEVICE_TEST_MODE           2       /* (high speed only) */
-#define USB_DEVICE_B_HNP_ENABLE                3       /* dev may initiate HNP */
-#define USB_DEVICE_A_HNP_SUPPORT       4       /* RH port supports HNP */
-#define USB_DEVICE_A_ALT_HNP_SUPPORT   5       /* other RH port does */
+#define USB_DEVICE_TEST_MODE           2       /* (wired high speed only) */
+#define USB_DEVICE_BATTERY             2       /* (wireless) */
+#define USB_DEVICE_B_HNP_ENABLE                3       /* (otg) dev may initiate HNP */
+#define USB_DEVICE_WUSB_DEVICE         3       /* (wireless)*/
+#define USB_DEVICE_A_HNP_SUPPORT       4       /* (otg) RH port supports HNP */
+#define USB_DEVICE_A_ALT_HNP_SUPPORT   5       /* (otg) other RH port does */
 #define USB_DEVICE_DEBUG_MODE          6       /* (special devices only) */
 
 #define USB_ENDPOINT_HALT              0       /* IN/OUT will STALL */
@@ -135,6 +152,13 @@ struct usb_ctrlrequest {
 #define USB_DT_OTG                     0x09
 #define USB_DT_DEBUG                   0x0a
 #define USB_DT_INTERFACE_ASSOCIATION   0x0b
+/* these are from the Wireless USB spec */
+#define USB_DT_SECURITY                        0x0c
+#define USB_DT_KEY                     0x0d
+#define USB_DT_ENCRYPTION_TYPE         0x0e
+#define USB_DT_BOS                     0x0f
+#define USB_DT_DEVICE_CAPABILITY       0x10
+#define USB_DT_WIRELESS_ENDPOINT_COMP  0x11
 
 /* conventional codes for class-specific descriptors */
 #define USB_DT_CS_DEVICE               0x21
@@ -192,6 +216,7 @@ struct usb_device_descriptor {
 #define USB_CLASS_CSCID                        0x0b    /* chip+ smart card */
 #define USB_CLASS_CONTENT_SEC          0x0d    /* content security */
 #define USB_CLASS_VIDEO                        0x0e
+#define USB_CLASS_WIRELESS_CONTROLLER  0xe0
 #define USB_CLASS_APP_SPEC             0xfe
 #define USB_CLASS_VENDOR_SPEC          0xff
 
@@ -223,6 +248,7 @@ struct usb_config_descriptor {
 #define USB_CONFIG_ATT_ONE             (1 << 7)        /* must be set */
 #define USB_CONFIG_ATT_SELFPOWER       (1 << 6)        /* self powered */
 #define USB_CONFIG_ATT_WAKEUP          (1 << 5)        /* can wakeup */
+#define USB_CONFIG_ATT_BATTERY         (1 << 4)        /* battery powered */
 
 /*-------------------------------------------------------------------------*/
 
@@ -289,6 +315,7 @@ struct usb_endpoint_descriptor {
 #define USB_ENDPOINT_XFER_ISOC         1
 #define USB_ENDPOINT_XFER_BULK         2
 #define USB_ENDPOINT_XFER_INT          3
+#define USB_ENDPOINT_MAX_ADJUSTABLE    0x80
 
 
 /*-------------------------------------------------------------------------*/
@@ -350,6 +377,147 @@ struct usb_interface_assoc_descriptor {
 } __attribute__ ((packed));
 
 
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_SECURITY:  group of wireless security descriptors, including
+ * encryption types available for setting up a CC/association.
+ */
+struct usb_security_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __le16 wTotalLength;
+       __u8  bNumEncryptionTypes;
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_KEY:  used with {GET,SET}_SECURITY_DATA; only public keys
+ * may be retrieved.
+ */
+struct usb_key_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __u8  tTKID[3];
+       __u8  bReserved;
+       __u8  bKeyData[0];
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_ENCRYPTION_TYPE:  bundled in DT_SECURITY groups */
+struct usb_encryption_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __u8  bEncryptionType;
+#define        USB_ENC_TYPE_UNSECURE           0
+#define        USB_ENC_TYPE_WIRED              1       /* non-wireless mode */
+#define        USB_ENC_TYPE_CCM_1              2       /* aes128/cbc session */
+#define        USB_ENC_TYPE_RSA_1              3       /* rsa3072/sha1 auth */
+       __u8  bEncryptionValue;         /* use in SET_ENCRYPTION */
+       __u8  bAuthKeyIndex;
+};
+
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_BOS:  group of wireless capabilities */
+struct usb_bos_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __le16 wTotalLength;
+       __u8  bNumDeviceCaps;
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_DEVICE_CAPABILITY:  grouped with BOS */
+struct usb_dev_cap_header {
+       __u8  bLength;
+       __u8  bDescriptorType;
+       __u8  bDevCapabilityType;
+};
+
+#define        USB_CAP_TYPE_WIRELESS_USB       1
+
+struct usb_wireless_cap_descriptor {   /* Ultra Wide Band */
+       __u8  bLength;
+       __u8  bDescriptorType;
+       __u8  bDevCapabilityType;
+
+       __u8  bmAttributes;
+#define        USB_WIRELESS_P2P_DRD            (1 << 1)
+#define        USB_WIRELESS_BEACON_MASK        (3 << 2)
+#define        USB_WIRELESS_BEACON_SELF        (1 << 2)
+#define        USB_WIRELESS_BEACON_DIRECTED    (2 << 2)
+#define        USB_WIRELESS_BEACON_NONE        (3 << 2)
+       __le16 wPHYRates;       /* bit rates, Mbps */
+#define        USB_WIRELESS_PHY_53             (1 << 0)        /* always set */
+#define        USB_WIRELESS_PHY_80             (1 << 1)
+#define        USB_WIRELESS_PHY_107            (1 << 2)        /* always set */
+#define        USB_WIRELESS_PHY_160            (1 << 3)
+#define        USB_WIRELESS_PHY_200            (1 << 4)        /* always set */
+#define        USB_WIRELESS_PHY_320            (1 << 5)
+#define        USB_WIRELESS_PHY_400            (1 << 6)
+#define        USB_WIRELESS_PHY_480            (1 << 7)
+       __u8  bmTFITXPowerInfo; /* TFI power levels */
+       __u8  bmFFITXPowerInfo; /* FFI power levels */
+       __le16 bmBandGroup;
+       __u8  bReserved;
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_DT_WIRELESS_ENDPOINT_COMP:  companion descriptor associated with
+ * each endpoint descriptor for a wireless device
+ */
+struct usb_wireless_ep_comp_descriptor {
+       __u8  bLength;
+       __u8  bDescriptorType;
+
+       __u8  bMaxBurst;
+       __u8  bMaxSequence;
+       __le16 wMaxStreamDelay;
+       __le16 wOverTheAirPacketSize;
+       __u8  bOverTheAirInterval;
+       __u8  bmCompAttributes;
+#define USB_ENDPOINT_SWITCH_MASK       0x03    /* in bmCompAttributes */
+#define USB_ENDPOINT_SWITCH_NO         0
+#define USB_ENDPOINT_SWITCH_SWITCH     1
+#define USB_ENDPOINT_SWITCH_SCALE      2
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_REQ_SET_HANDSHAKE is a four-way handshake used between a wireless
+ * host and a device for connection set up, mutual authentication, and
+ * exchanging short lived session keys.  The handshake depends on a CC.
+ */
+struct usb_handshake {
+       __u8 bMessageNumber;
+       __u8 bStatus;
+       __u8 tTKID[3];
+       __u8 bReserved;
+       __u8 CDID[16];
+       __u8 nonce[16];
+       __u8 MIC[8];
+};
+
+/*-------------------------------------------------------------------------*/
+
+/* USB_REQ_SET_CONNECTION modifies or revokes a connection context (CC).
+ * A CC may also be set up using non-wireless secure channels (including
+ * wired USB!), and some devices may support CCs with multiple hosts.
+ */
+struct usb_connection_context {
+       __u8 CHID[16];          /* persistent host id */
+       __u8 CDID[16];          /* device id (unique w/in host context) */
+       __u8 CK[16];            /* connection key */
+};
+
 /*-------------------------------------------------------------------------*/
 
 /* USB 2.0 defines three speeds, here's how Linux identifies them */
@@ -357,7 +525,8 @@ struct usb_interface_assoc_descriptor {
 enum usb_device_speed {
        USB_SPEED_UNKNOWN = 0,                  /* enumerating */
        USB_SPEED_LOW, USB_SPEED_FULL,          /* usb 1.1 */
-       USB_SPEED_HIGH                          /* usb 2.0 */
+       USB_SPEED_HIGH,                         /* usb 2.0 */
+       USB_SPEED_VARIABLE,                     /* wireless (usb 2.5) */
 };
 
 enum usb_device_state {