File content as of revision 0:003889bc474f:

/*
Copyright (c) 2010 Peter Barrett

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/

#ifndef USBHOST_H
#define USBHOST_H

#ifndef u8
typedef unsigned char u8;
typedef unsigned short u16;
typedef unsigned long u32;

typedef char s8;
typedef short s16;
typedef char s32;
#endif

#define ENDPOINT_CONTROL 0
#define ENDPOINT_ISOCRONOUS 1
#define ENDPOINT_BULK 2
#define ENDPOINT_INTERRUPT 3

#define  DESCRIPTOR_TYPE_DEVICE            1
#define  DESCRIPTOR_TYPE_CONFIGURATION    2
#define  DESCRIPTOR_TYPE_STRING            3
#define  DESCRIPTOR_TYPE_INTERFACE        4
#define  DESCRIPTOR_TYPE_ENDPOINT        5

#define DESCRIPTOR_TYPE_HID         0x21
#define DESCRIPTOR_TYPE_REPORT      0x22
#define DESCRIPTOR_TYPE_PHYSICAL    0x23
#define DESCRIPTOR_TYPE_HUB         0x29

enum USB_CLASS_CODE
{
    CLASS_DEVICE,
    CLASS_AUDIO,
    CLASS_COMM_AND_CDC_CONTROL,
    CLASS_HID,
    CLASS_PHYSICAL = 0x05,
    CLASS_STILL_IMAGING,
    CLASS_PRINTER,
    CLASS_MASS_STORAGE,
    CLASS_HUB,
    CLASS_CDC_DATA,
    CLASS_SMART_CARD,
    CLASS_CONTENT_SECURITY = 0x0D,
    CLASS_VIDEO = 0x0E,
    CLASS_DIAGNOSTIC_DEVICE = 0xDC,
    CLASS_WIRELESS_CONTROLLER = 0xE0,
    CLASS_MISCELLANEOUS = 0xEF,
    CLASS_APP_SPECIFIC = 0xFE,
    CLASS_VENDOR_SPECIFIC = 0xFF
};

#define  DEVICE_TO_HOST         0x80
#define  HOST_TO_DEVICE         0x00
#define  REQUEST_TYPE_CLASS     0x20
#define  RECIPIENT_DEVICE       0x00
#define  RECIPIENT_INTERFACE    0x01
#define  RECIPIENT_ENDPOINT        0x02
#define  RECIPIENT_OTHER        0x03

#define  GET_STATUS                0
#define  CLEAR_FEATURE            1
#define  SET_FEATURE            3
#define  SET_ADDRESS            5
#define  GET_DESCRIPTOR            6
#define  SET_DESCRIPTOR            7
#define  GET_CONFIGURATION        8
#define  SET_CONFIGURATION        9
#define  GET_INTERFACE            10
#define  SET_INTERFACE            11
#define  SYNCH_FRAME            11

//        -5 is nak
/*
0010 ACK Handshake
1010 NAK Handshake
1110 STALL Handshake
0110 NYET (No Response Yet)
*/

#define IO_PENDING -100
#define ERR_ENDPOINT_NONE_LEFT -101
#define ERR_ENDPOINT_NOT_FOUND -102
#define ERR_DEVICE_NOT_FOUND -103
#define ERR_DEVICE_NONE_LEFT -104
#define ERR_HUB_INIT_FAILED -105
#define ERR_INTERFACE_NOT_FOUND -106

typedef struct
{
    u8    bLength;
    u8    bDescriptorType;
    u16 bcdUSB;
    u8 bDeviceClass;
    u8 bDeviceSubClass;
    u8 bDeviceProtocol;
    u8 bMaxPacketSize;
    u16 idVendor;
    u16 idProduct;
    u16 bcdDevice;    // version
    u8 iManufacturer;
    u8 iProduct;
    u8 iSerialNumber;
    u8 bNumConfigurations;
} DeviceDescriptor;    // 16 bytes

typedef struct
{
    u8    bLength;
    u8    bDescriptorType;
    u16    wTotalLength;
    u8    bNumInterfaces;
    u8    bConfigurationValue;    // Value to use as an argument to select this configuration
    u8    iConfiguration;            // Index of String Descriptor describing this configuration
    u8    bmAttributes;            // Bitmap D7 Reserved, set to 1. (USB 1.0 Bus Powered),D6 Self Powered,D5 Remote Wakeup,D4..0 = 0
    u8    bMaxPower;                // Maximum Power Consumption in 2mA units
} ConfigurationDescriptor;

typedef struct
{
    u8    bLength;
    u8    bDescriptorType;
    u8  bInterfaceNumber;
    u8    bAlternateSetting;
    u8    bNumEndpoints;
    u8    bInterfaceClass;
    u8    bInterfaceSubClass;
    u8    bInterfaceProtocol;
    u8    iInterface;                // Index of String Descriptor Describing this interface
} InterfaceDescriptor;

typedef struct
{
    u8    bLength;
    u8    bDescriptorType;
    u8    bEndpointAddress;    // Bits 0:3 endpoint, Bits 7 Direction 0 = Out, 1 = In (Ignored for Control Endpoints)
    u8    bmAttributes;        // Bits 0:1 00 = Control, 01 = Isochronous, 10 = Bulk, 11 = Interrupt
    u16 wMaxPacketSize;
    u8    bInterval;            // Interval for polling endpoint data transfers.
} EndpointDescriptor;

typedef struct {
  u8    bLength;
  u8    bDescriptorType;
  u16   bcdHID;
  u8    bCountryCode;
  u8    bNumDescriptors;
  u8    bDescriptorType2;
  u16   wDescriptorLength;
} HIDDescriptor;

//============================================================================
//============================================================================


void USBInit();
void USBLoop();
u8* USBGetBuffer(u32* len);

//    Optional callback for transfers, called at interrupt time
typedef void (*USBCallback)(int device, int endpoint, int status, u8* data, int len, void* userData);

//    Transfers
int USBControlTransfer(int device, int request_type, int request, int value, int index, u8* data, int length, USBCallback callback = 0, void* userData = 0);
int USBInterruptTransfer(int device, int ep, u8* data, int length, USBCallback callback = 0, void* userData = 0);
int USBBulkTransfer(int device, int ep, u8* data, int length, USBCallback callback = 0, void* userData = 0);

//    Standard Device methods
int GetDescriptor(int device, int descType, int descIndex, u8* data, int length);
int GetString(int device, int index, char* dst, int length);
int SetAddress(int device, int new_addr);
int SetConfiguration(int device, int configNum);
int SetInterface(int device, int ifNum, int altNum);

//    Implemented to notify app of the arrival of a device
void OnLoadDevice(int device, DeviceDescriptor* deviceDesc, InterfaceDescriptor* interfaceDesc);

#endif