usb_ch9.h

基于TI DSP/BIOS的usb网卡的实现

/*
 * This file holds USB constants and structures that are needed for USB
 * device APIs.  These are used by the USB device model, which is defined
 * in chapter 9 of the USB 2.0 specification.  Linux has several APIs in C
 * that need these:
 *
 * - the master/host side Linux-USB kernel driver API;
 * - the "usbfs" user space API; and
 * - 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 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
#define __LINUX_USB_CH9_H

#include "usbdefs.h"

/* GetStatus */
#define DEVSTS_SELFPOWERED       0x01
#define DEVSTS_REMOTEWAKEUP      0x02
#define ENDPSTS_HALT             0x01

/*-------------------------------------------------------------------------*/

/* CONTROL REQUEST SUPPORT */

/*
 * USB directions
 *
 * This bit flag is used in endpoint descriptors' bEndpointAddress field.
 * It's also one of three fields in control requests bRequestType.
 */
#define USB_DIR_OUT         0       /* to device */
#define USB_DIR_IN          0x80        /* to host */

/*
 * USB types, the second of three bRequestType fields
 */
#define USB_TYPE_MASK           (0x03 << 5)
#define USB_TYPE_STANDARD       (0x00 << 5)
#define USB_TYPE_CLASS          (0x01 << 5)
#define USB_TYPE_VENDOR         (0x02 << 5)
#define USB_TYPE_RESERVED       (0x03 << 5)

/*
 * USB recipients, the third of three bRequestType fields
 */
#define USB_RECIP_MASK          0x1f
#define USB_RECIP_DEVICE        0x00
#define USB_RECIP_INTERFACE     0x01
#define USB_RECIP_ENDPOINT      0x02
#define USB_RECIP_OTHER         0x03

/*
 * Standard requests, for the bRequest field of a SETUP packet.
 *
 * These are qualified by the bRequestType field, so that for example
 * TYPE_CLASS or TYPE_VENDOR specific feature flags could be retrieved
 * by a GET_STATUS request.
 */
#define USB_REQ_GET_STATUS      0x00
#define USB_REQ_CLEAR_FEATURE       0x01
#define USB_REQ_SET_FEATURE     0x03
#define USB_REQ_SET_ADDRESS     0x05
#define USB_REQ_GET_DESCRIPTOR      0x06
#define USB_REQ_SET_DESCRIPTOR      0x07
#define USB_REQ_GET_CONFIGURATION   0x08
#define USB_REQ_SET_CONFIGURATION   0x09
#define USB_REQ_GET_INTERFACE       0x0A
#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
 * are at most sixteen features of each type.)
 */
#define USB_DEVICE_SELF_POWERED     0   /* (read only) */
#define USB_DEVICE_REMOTE_WAKEUP    1   /* dev may initiate wakeup */
#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 */

/**
 * struct usb_ctrlrequest - SETUP data for a USB device control request
 * @bRequestType: matches the USB bmRequestType field
 * @bRequest: matches the USB bRequest field
 * @wValue: matches the USB wValue field (le16 byte order)
 * @wIndex: matches the USB wIndex field (le16 byte order)
 * @wLength: matches the USB wLength field (le16 byte order)
 *
 * This structure is used to send control requests to a USB device.  It matches
 * the different fields of the USB 2.0 Spec section 9.3, table 9-2.  See the
 * USB spec for a fuller description of the different fields, and what they are
 * used for.
 *
 * Note that the driver for any interface can issue control requests.
 * For most devices, interfaces don't coordinate with each other, so
 * such requests may be made at any time.
 */
struct usb_ctrlrequest {
    u8 bRequestType;
    u8 bRequest;
    le16 wValue;
    le16 wIndex;
    le16 wLength;
} /* __attribute__ (( packed ))*/;

/*-------------------------------------------------------------------------*/

/*
 * STANDARD DESCRIPTORS ... as returned by GET_DESCRIPTOR, or
 * (rarely) accepted by SET_DESCRIPTOR.
 *
 * Note that all multi-byte values here are encoded in little endian
 * byte order "on the wire".  But when exposed through Linux-USB APIs,
 * they've been converted to cpu byte order.
 */

/*
 * Descriptor types ... USB 2.0 spec table 9.5
 */
#define USB_DT_DEVICE           0x01
#define USB_DT_CONFIG           0x02
#define USB_DT_STRING           0x03
#define USB_DT_INTERFACE        0x04
#define USB_DT_ENDPOINT         0x05
#define USB_DT_DEVICE_QUALIFIER     0x06
#define USB_DT_OTHER_SPEED_CONFIG   0x07
#define USB_DT_INTERFACE_POWER      0x08
/* these are from a minor usb 2.0 revision (ECN) */
#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
#define USB_DT_CS_CONFIG        0x22
#define USB_DT_CS_STRING        0x23
#define USB_DT_CS_INTERFACE     0x24
#define USB_DT_CS_ENDPOINT      0x25

/* All standard descriptors have these 2 fields at the beginning */
struct usb_descriptor_header {
    u8  bLength;
    u8  bDescriptorType;
} /* __attribute__ (( packed ))*/;

/*-------------------------------------------------------------------------*/

/* USB_DT_DEVICE: Device descriptor */
struct usb_device_descriptor {
    u8  bLength;
    u8  bDescriptorType;

    le16 bcdUSB;
    u8  bDeviceClass;
    u8  bDeviceSubClass;
    u8  bDeviceProtocol;
    u8  bMaxPacketSize0;
    le16 idVendor;
    le16 idProduct;
    le16 bcdDevice;
    u8  iManufacturer;
    u8  iProduct;
    u8  iSerialNumber;
    u8  bNumConfigurations;
} /*__attribute__ (( packed ))*/;

#define USB_DT_DEVICE_SIZE      18

/*
 * Device and/or Interface Class codes
 * as found in bDeviceClass or bInterfaceClass
 * and defined by www.usb.org documents
 */
#define USB_CLASS_PER_INTERFACE     0   /* for DeviceClass */
#define USB_CLASS_AUDIO         1
#define USB_CLASS_COMM          2
#define USB_CLASS_HID           3
#define USB_CLASS_PHYSICAL      5
#define USB_CLASS_STILL_IMAGE       6
#define USB_CLASS_PRINTER       7
#define USB_CLASS_MASS_STORAGE      8
#define USB_CLASS_HUB           9
#define USB_CLASS_CDC_DATA      0x0a
#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

/*-------------------------------------------------------------------------*/

/* USB_DT_CONFIG: Configuration descriptor information.
 *
 * USB_DT_OTHER_SPEED_CONFIG is the same descriptor, except that the
 * descriptor type is different.  Highspeed-capable devices can look
 * different depending on what speed they're currently running.  Only
 * devices with a USB_DT_DEVICE_QUALIFIER have any OTHER_SPEED_CONFIG
 * descriptors.
 */
struct usb_config_descriptor {
    u8  bLength;
    u8  bDescriptorType;

    le16 wTotalLength;
    u8  bNumInterfaces;
    u8  bConfigurationValue;
    u8  iConfiguration;
    u8  bmAttributes;
    u8  bMaxPower;
} /* __attribute__ (( packed ))*/;

#define USB_DT_CONFIG_SIZE      9

/* from config descriptor bmAttributes */
#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 */

/*-------------------------------------------------------------------------*/

/* USB_DT_STRING: String descriptor */
struct usb_string_descriptor {
    u8  bLength;
    u8  bDescriptorType;

    le16 wData[1];        /* UTF-16LE encoded */
} /* __attribute__ (( packed ))*/;

/* note that "string" zero is special, it holds language codes that
 * the device supports, not Unicode characters.
 */

/*-------------------------------------------------------------------------*/

/* USB_DT_INTERFACE: Interface descriptor */
struct usb_interface_descriptor {
    u8  bLength;
    u8  bDescriptorType;

    u8  bInterfaceNumber;