#include "usb_desc.h"


// USB Descriptors are binary data which the USB host reads to
// automatically detect a USB device's capabilities.  The format
// and meaning of every field is documented in numerous USB
// standards.  When working with USB descriptors, despite the
// complexity of the standards and poor writing quality in many
// of those documents, remember descriptors are nothing more
// than constant binary data that tells the USB host what the
// device can do.  Computers will load drivers based on this data.
// Those drivers then communicate on the endpoints specified by
// the descriptors.

// To configure a new combination of interfaces or make minor
// changes to existing configuration (eg, change the name or ID
// numbers), usually you would edit "usb_desc.h".  This file
// is meant to be configured by the header, so generally it is
// only edited to add completely new USB interfaces or features.



// **************************************************************
//   USB Device
// **************************************************************

#define LSB(n) ((n) & 255)
#define MSB(n) (((n) >> 8) & 255)

// USB Device Descriptor.  The USB host reads this first, to learn
// what type of device is connected.
static uint8_t device_descriptor[] = {
        18,                                     // bLength
        1,                                      // bDescriptorType
        0x00, 0x02,                             // bcdUSB
#ifdef DEVICE_CLASS
        DEVICE_CLASS,                           // bDeviceClass
#else
	0,
#endif
#ifdef DEVICE_SUBCLASS
        DEVICE_SUBCLASS,                        // bDeviceSubClass
#else
	0,
#endif
#ifdef DEVICE_PROTOCOL
        DEVICE_PROTOCOL,                        // bDeviceProtocol
#else
	0,
#endif
        EP0_SIZE,                               // bMaxPacketSize0
        LSB(VENDOR_ID), MSB(VENDOR_ID),         // idVendor
        LSB(PRODUCT_ID), MSB(PRODUCT_ID),       // idProduct
        0x00, 0x01,                             // bcdDevice
        1,                                      // iManufacturer
        2,                                      // iProduct
        3,                                      // iSerialNumber
        1                                       // bNumConfigurations
};

// These descriptors must NOT be "const", because the USB DMA
// has trouble accessing flash memory with enough bandwidth
// while the processor is executing from flash.



// **************************************************************
//   HID Report Descriptors
// **************************************************************

// Each HID interface needs a special report descriptor that tells
// the meaning and format of the data.

#ifdef KEYBOARD_INTERFACE
// Keyboard Protocol 1, HID 1.11 spec, Appendix B, page 59-60
static uint8_t keyboard_report_desc[] = {
        0x05, 0x01,             //  Usage Page (Generic Desktop),
        0x09, 0x06,             //  Usage (Keyboard),
        0xA1, 0x01,             //  Collection (Application),
        0x75, 0x01,             //  Report Size (1),
        0x95, 0x08,             //  Report Count (8),
        0x05, 0x07,             //  Usage Page (Key Codes),
        0x19, 0xE0,             //  Usage Minimum (224),
        0x29, 0xE7,             //  Usage Maximum (231),
        0x15, 0x00,             //  Logical Minimum (0),
        0x25, 0x01,             //  Logical Maximum (1),
        0x81, 0x02,             //  Input (Data, Variable, Absolute), ;Modifier byte
        0x95, 0x08,             //  Report Count (8),
        0x75, 0x01,             //  Report Size (1),
        0x15, 0x00,             //  Logical Minimum (0),
        0x25, 0x01,             //  Logical Maximum (1),
        0x05, 0x0C,             //  Usage Page (Consumer),
        0x09, 0xE9,             //  Usage (Volume Increment),
        0x09, 0xEA,             //  Usage (Volume Decrement),
        0x09, 0xE2,             //  Usage (Mute),
        0x09, 0xCD,             //  Usage (Play/Pause),
        0x09, 0xB5,             //  Usage (Scan Next Track),
        0x09, 0xB6,             //  Usage (Scan Previous Track),
        0x09, 0xB7,             //  Usage (Stop),
        0x09, 0xB8,             //  Usage (Eject),
        0x81, 0x02,             //  Input (Data, Variable, Absolute), ;Media keys
        0x95, 0x05,             //  Report Count (5),
        0x75, 0x01,             //  Report Size (1),
        0x05, 0x08,             //  Usage Page (LEDs),
        0x19, 0x01,             //  Usage Minimum (1),
        0x29, 0x05,             //  Usage Maximum (5),
        0x91, 0x02,             //  Output (Data, Variable, Absolute), ;LED report
        0x95, 0x01,             //  Report Count (1),
        0x75, 0x03,             //  Report Size (3),
        0x91, 0x03,             //  Output (Constant),                 ;LED report padding
        0x95, 0x06,             //  Report Count (6),
        0x75, 0x08,             //  Report Size (8),
        0x15, 0x00,             //  Logical Minimum (0),
        0x25, 0x7F,             //  Logical Maximum(104),
        0x05, 0x07,             //  Usage Page (Key Codes),
        0x19, 0x00,             //  Usage Minimum (0),
        0x29, 0x7F,             //  Usage Maximum (104),
        0x81, 0x00,             //  Input (Data, Array),                ;Normal keys
        0xc0                    // End Collection
};
#endif

#ifdef MOUSE_INTERFACE
// Mouse Protocol 1, HID 1.11 spec, Appendix B, page 59-60, with wheel extension
static uint8_t mouse_report_desc[] = {
        0x05, 0x01,                     // Usage Page (Generic Desktop)
        0x09, 0x02,                     // Usage (Mouse)
        0xA1, 0x01,                     // Collection (Application)
        0x05, 0x09,                     //   Usage Page (Button)
        0x19, 0x01,                     //   Usage Minimum (Button #1)
        0x29, 0x03,                     //   Usage Maximum (Button #3)
        0x15, 0x00,                     //   Logical Minimum (0)
        0x25, 0x01,                     //   Logical Maximum (1)
        0x95, 0x03,                     //   Report Count (3)
        0x75, 0x01,                     //   Report Size (1)
        0x81, 0x02,                     //   Input (Data, Variable, Absolute)
        0x95, 0x01,                     //   Report Count (1)
        0x75, 0x05,                     //   Report Size (5)
        0x81, 0x03,                     //   Input (Constant)
        0x05, 0x01,                     //   Usage Page (Generic Desktop)
        0x09, 0x30,                     //   Usage (X)
        0x09, 0x31,                     //   Usage (Y)
        0x15, 0x81,                     //   Logical Minimum (-127)
        0x25, 0x7F,                     //   Logical Maximum (127)
        0x75, 0x08,                     //   Report Size (8),
        0x95, 0x02,                     //   Report Count (2),
        0x81, 0x06,                     //   Input (Data, Variable, Relative)
        0x09, 0x38,                     //   Usage (Wheel)
        0x95, 0x01,                     //   Report Count (1),
        0x81, 0x06,                     //   Input (Data, Variable, Relative)
        0xC0                            // End Collection
};
#endif



// **************************************************************
//   USB Configuration
// **************************************************************

// USB Configuration Descriptor.  This huge descriptor tells all
// of the devices capbilities.
static uint8_t config_descriptor[CONFIG_DESC_SIZE] = {
        // configuration descriptor, USB spec 9.6.3, page 264-266, Table 9-10
        9,                                      // bLength;
        2,                                      // bDescriptorType;
        LSB(CONFIG_DESC_SIZE),                 // wTotalLength
        MSB(CONFIG_DESC_SIZE),
        NUM_INTERFACE,                          // bNumInterfaces
        1,                                      // bConfigurationValue
        0,                                      // iConfiguration
        0xC0,                                   // bmAttributes
        50,                                     // bMaxPower

#ifdef CDC_IAD_DESCRIPTOR
        // interface association descriptor, USB ECN, Table 9-Z
        8,                                      // bLength
        11,                                     // bDescriptorType
        CDC_STATUS_INTERFACE,                   // bFirstInterface
        2,                                      // bInterfaceCount
        0x02,                                   // bFunctionClass
        0x02,                                   // bFunctionSubClass
        0x01,                                   // bFunctionProtocol
        4,                                      // iFunction
#endif

#ifdef CDC_DATA_INTERFACE
        // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
        9,                                      // bLength
        4,                                      // bDescriptorType
        CDC_STATUS_INTERFACE,			// bInterfaceNumber
        0,                                      // bAlternateSetting
        1,                                      // bNumEndpoints
        0x02,                                   // bInterfaceClass
        0x02,                                   // bInterfaceSubClass
        0x01,                                   // bInterfaceProtocol
        0,                                      // iInterface
        // CDC Header Functional Descriptor, CDC Spec 5.2.3.1, Table 26
        5,                                      // bFunctionLength
        0x24,                                   // bDescriptorType
        0x00,                                   // bDescriptorSubtype
        0x10, 0x01,                             // bcdCDC
        // Call Management Functional Descriptor, CDC Spec 5.2.3.2, Table 27
        5,                                      // bFunctionLength
        0x24,                                   // bDescriptorType
        0x01,                                   // bDescriptorSubtype
        0x01,                                   // bmCapabilities
        1,                                      // bDataInterface
        // Abstract Control Management Functional Descriptor, CDC Spec 5.2.3.3, Table 28
        4,                                      // bFunctionLength
        0x24,                                   // bDescriptorType
        0x02,                                   // bDescriptorSubtype
        0x06,                                   // bmCapabilities
        // Union Functional Descriptor, CDC Spec 5.2.3.8, Table 33
        5,                                      // bFunctionLength
        0x24,                                   // bDescriptorType
        0x06,                                   // bDescriptorSubtype
        CDC_STATUS_INTERFACE,                   // bMasterInterface
        CDC_DATA_INTERFACE,                     // bSlaveInterface0
        // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
        7,                                      // bLength
        5,                                      // bDescriptorType
        CDC_ACM_ENDPOINT | 0x80,                // bEndpointAddress
        0x03,                                   // bmAttributes (0x03=intr)
        CDC_ACM_SIZE, 0,                        // wMaxPacketSize
        64,                                     // bInterval
        // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
        9,                                      // bLength
        4,                                      // bDescriptorType
        CDC_DATA_INTERFACE,                     // bInterfaceNumber
        0,                                      // bAlternateSetting
        2,                                      // bNumEndpoints
        0x0A,                                   // bInterfaceClass
        0x00,                                   // bInterfaceSubClass
        0x00,                                   // bInterfaceProtocol
        0,                                      // iInterface
        // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
        7,                                      // bLength
        5,                                      // bDescriptorType
        CDC_RX_ENDPOINT,                        // bEndpointAddress
        0x02,                                   // bmAttributes (0x02=bulk)
        CDC_RX_SIZE, 0,                         // wMaxPacketSize
        0,                                      // bInterval
        // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
        7,                                      // bLength
        5,                                      // bDescriptorType
        CDC_TX_ENDPOINT | 0x80,                 // bEndpointAddress
        0x02,                                   // bmAttributes (0x02=bulk)
        CDC_TX_SIZE, 0,                         // wMaxPacketSize
        0,                                      // bInterval
#endif // CDC_DATA_INTERFACE

#ifdef KEYBOARD_INTERFACE
        // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
        9,                                      // bLength
        4,                                      // bDescriptorType
        KEYBOARD_INTERFACE,                     // bInterfaceNumber
        0,                                      // bAlternateSetting
        1,                                      // bNumEndpoints
        0x03,                                   // bInterfaceClass (0x03 = HID)
        0x01,                                   // bInterfaceSubClass (0x01 = Boot)
        0x01,                                   // bInterfaceProtocol (0x01 = Keyboard)
        0,                                      // iInterface
        // HID interface descriptor, HID 1.11 spec, section 6.2.1
        9,                                      // bLength
        0x21,                                   // bDescriptorType
        0x11, 0x01,                             // bcdHID
        0,                                      // bCountryCode
        1,                                      // bNumDescriptors
        0x22,                                   // bDescriptorType
        LSB(sizeof(keyboard_report_desc)),      // wDescriptorLength
        MSB(sizeof(keyboard_report_desc)),
        // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
        7,                                      // bLength
        5,                                      // bDescriptorType
        KEYBOARD_ENDPOINT | 0x80,               // bEndpointAddress
        0x03,                                   // bmAttributes (0x03=intr)
        KEYBOARD_SIZE, 0,                       // wMaxPacketSize
        KEYBOARD_INTERVAL,                      // bInterval
#endif // KEYBOARD_INTERFACE

#ifdef MOUSE_INTERFACE
        // interface descriptor, USB spec 9.6.5, page 267-269, Table 9-12
        9,                                      // bLength
        4,                                      // bDescriptorType
        MOUSE_INTERFACE,                        // bInterfaceNumber
        0,                                      // bAlternateSetting
        1,                                      // bNumEndpoints
        0x03,                                   // bInterfaceClass (0x03 = HID)
        0x01,                                   // bInterfaceSubClass (0x01 = Boot)
        0x02,                                   // bInterfaceProtocol (0x02 = Mouse)
        0,                                      // iInterface
        // HID interface descriptor, HID 1.11 spec, section 6.2.1
        9,                                      // bLength
        0x21,                                   // bDescriptorType
        0x11, 0x01,                             // bcdHID
        0,                                      // bCountryCode
        1,                                      // bNumDescriptors
        0x22,                                   // bDescriptorType
        LSB(sizeof(mouse_report_desc)),         // wDescriptorLength
        MSB(sizeof(mouse_report_desc)),
        // endpoint descriptor, USB spec 9.6.6, page 269-271, Table 9-13
        7,                                      // bLength
        5,                                      // bDescriptorType
        MOUSE_ENDPOINT | 0x80,                  // bEndpointAddress
        0x03,                                   // bmAttributes (0x03=intr)
        MOUSE_SIZE, 0,                          // wMaxPacketSize
        MOUSE_INTERVAL,                         // bInterval
#endif // MOUSE_INTERFACE
};



// **************************************************************
//   String Descriptors
// **************************************************************

// The descriptors above can provide human readable strings,
// referenced by index numbers.  These descriptors are the
// actual string data

struct usb_string_descriptor_struct {
        uint8_t bLength;
        uint8_t bDescriptorType;
        uint16_t wString[];
};

static struct usb_string_descriptor_struct string0 = {
        4,
        3,
        {0x0409}
};

static struct usb_string_descriptor_struct string1 = {
        sizeof(STR_MANUFACTURER),
        3,
        STR_MANUFACTURER
};
static struct usb_string_descriptor_struct string2 = {
	sizeof(STR_PRODUCT),
        3,
        STR_PRODUCT
};
static struct usb_string_descriptor_struct string3 = {
	sizeof(STR_SERIAL),
        3,
	STR_SERIAL
};


// **************************************************************
//   Descriptors List
// **************************************************************

// This table provides access to all the descriptor data above.

const usb_descriptor_list_t usb_descriptor_list[] = {
	//wValue, wIndex, address,          length
	{0x0100, 0x0000, device_descriptor, sizeof(device_descriptor)},
	{0x0200, 0x0000, config_descriptor, sizeof(config_descriptor)},
#ifdef KEYBOARD_INTERFACE
        {0x2200, KEYBOARD_INTERFACE, keyboard_report_desc, sizeof(keyboard_report_desc)},
        {0x2100, KEYBOARD_INTERFACE, config_descriptor+KEYBOARD_DESC_OFFSET, 9},
#endif
#ifdef MOUSE_INTERFACE
        {0x2200, MOUSE_INTERFACE, mouse_report_desc, sizeof(mouse_report_desc)},
        {0x2100, MOUSE_INTERFACE, config_descriptor+MOUSE_DESC_OFFSET, 9},
#endif
        {0x0300, 0x0000, (const uint8_t *)&string0, 4},
        {0x0301, 0x0409, (const uint8_t *)&string1, sizeof(STR_MANUFACTURER)},
        {0x0302, 0x0409, (const uint8_t *)&string2, sizeof(STR_PRODUCT)},
        {0x0303, 0x0409, (const uint8_t *)&string3, sizeof(STR_SERIAL)},
	{0, 0, NULL, 0}
};


// **************************************************************
//   Endpoint Configuration
// **************************************************************

#if 0
// 0x00 = not used
// 0x19 = Recieve only
// 0x15 = Transmit only
// 0x1D = Transmit & Recieve
// 
const uint8_t usb_endpoint_config_table[NUM_ENDPOINTS] = 
{
	0x00, 0x15, 0x19, 0x15, 0x00, 0x00, 0x00, 0x00, 
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 
};
#endif


const uint8_t usb_endpoint_config_table[NUM_ENDPOINTS] = 
{
#if (defined(ENDPOINT1_CONFIG) && NUM_ENDPOINTS >= 1)
	ENDPOINT1_CONFIG,
#elif (NUM_ENDPOINTS >= 1)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT2_CONFIG) && NUM_ENDPOINTS >= 2)
	ENDPOINT2_CONFIG,
#elif (NUM_ENDPOINTS >= 2)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT3_CONFIG) && NUM_ENDPOINTS >= 3)
	ENDPOINT3_CONFIG,
#elif (NUM_ENDPOINTS >= 3)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT4_CONFIG) && NUM_ENDPOINTS >= 4)
	ENDPOINT4_CONFIG,
#elif (NUM_ENDPOINTS >= 4)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT5_CONFIG) && NUM_ENDPOINTS >= 5)
	ENDPOINT5_CONFIG,
#elif (NUM_ENDPOINTS >= 5)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT6_CONFIG) && NUM_ENDPOINTS >= 6)
	ENDPOINT6_CONFIG,
#elif (NUM_ENDPOINTS >= 6)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT7_CONFIG) && NUM_ENDPOINTS >= 7)
	ENDPOINT7_CONFIG,
#elif (NUM_ENDPOINTS >= 7)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT8_CONFIG) && NUM_ENDPOINTS >= 8)
	ENDPOINT8_CONFIG,
#elif (NUM_ENDPOINTS >= 8)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT9_CONFIG) && NUM_ENDPOINTS >= 9)
	ENDPOINT9_CONFIG,
#elif (NUM_ENDPOINTS >= 9)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT10_CONFIG) && NUM_ENDPOINTS >= 10)
	ENDPOINT10_CONFIG,
#elif (NUM_ENDPOINTS >= 10)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT11_CONFIG) && NUM_ENDPOINTS >= 11)
	ENDPOINT11_CONFIG,
#elif (NUM_ENDPOINTS >= 11)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT12_CONFIG) && NUM_ENDPOINTS >= 12)
	ENDPOINT12_CONFIG,
#elif (NUM_ENDPOINTS >= 12)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT13_CONFIG) && NUM_ENDPOINTS >= 13)
	ENDPOINT13_CONFIG,
#elif (NUM_ENDPOINTS >= 13)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT14_CONFIG) && NUM_ENDPOINTS >= 14)
	ENDPOINT14_CONFIG,
#elif (NUM_ENDPOINTS >= 14)
	ENDPOINT_UNUSED,
#endif
#if (defined(ENDPOINT15_CONFIG) && NUM_ENDPOINTS >= 15)
	ENDPOINT15_CONFIG,
#elif (NUM_ENDPOINTS >= 15)
	ENDPOINT_UNUSED,
#endif
};