#ifndef __HARDWARE_USB_COMMON_H__
#define __HARDWARE_USB_COMMON_H__

#include "stdint.h"

#define USB_DIR_OUT (0x00u)
#define USB_DIR_IN  (0x80u)

#define EP0_IN_ADDR  (USB_DIR_IN  | 0)
#define EP0_OUT_ADDR (USB_DIR_OUT | 0)
#define EP1_OUT_ADDR (USB_DIR_OUT | 1)
#define EP2_IN_ADDR  (USB_DIR_IN  | 2)

#define USB_TRANSFER_TYPE_CONTROL     (0x0)
#define USB_TRANSFER_TYPE_ISOCHRONOUS (0x1)
#define USB_TRANSFER_TYPE_BULK        (0x2)
#define USB_TRANSFER_TYPE_INTERRUPT   (0x3)
#define USB_TRANSFER_TYPE_BITS        (0x3)

// Descriptor types
#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_REQUEST_GET_STATUS 0x0
#define USB_REQUEST_CLEAR_FEATURE 0x01
#define USB_REQUEST_SET_FEATURE 0x03
#define USB_REQUEST_SET_ADDRESS 0x05
#define USB_REQUEST_GET_DESCRIPTOR 0x06
#define USB_REQUEST_SET_DESCRIPTOR 0x07
#define USB_REQUEST_GET_CONFIGURATION 0x08
#define USB_REQUEST_SET_CONFIGURATION 0x09
#define USB_REQUEST_GET_INTERFACE 0x0a
#define USB_REQUEST_SET_INTERFACE 0x0b
#define USB_REQUEST_SYNC_FRAME 0x0c

struct usb_setup_packet {
    uint8_t bmRequestType;
    uint8_t bRequest;
    uint16_t wValue;
    uint16_t wIndex;
    uint16_t wLength;
} __attribute__((packed));

struct usb_descriptor {
    uint8_t bLength;
    uint8_t bDescriptorType;
};

struct usb_device_descriptor {
    uint8_t bLength;
    uint8_t bDescriptorType;
    uint16_t bcdUSB;
    uint8_t bDeviceClass;
    uint8_t bDeviceSubClass;
    uint8_t bDeviceProtocol;
    uint8_t bMaxPacketSize0;
    uint16_t idVendor;
    uint16_t idProduct;
    uint16_t bcdDevice;
    uint8_t iManufacturer;
    uint8_t iProduct;
    uint8_t iSerialNumber;
    uint8_t bNumConfigurations;
} __attribute__((packed));

struct usb_configuration_descriptor {
    uint8_t bLength;
    uint8_t bDescriptorType;
    uint16_t wTotalLength;
    uint8_t bNumInterfaces;
    uint8_t bConfigurationValue;
    uint8_t iConfiguration;
    uint8_t bmAttributes;
    uint8_t bMaxPower;
} __attribute__((packed));

struct usb_interface_descriptor {
    uint8_t bLength;
    uint8_t bDescriptorType;
    uint8_t bInterfaceNumber;
    uint8_t bAlternateSetting;
    uint8_t bNumEndpoints;
    uint8_t bInterfaceClass;
    uint8_t bInterfaceSubClass;
    uint8_t bInterfaceProtocol;
    uint8_t iInterface;
} __attribute__((packed));

struct usb_endpoint_descriptor {
    uint8_t bLength;
    uint8_t bDescriptorType;
    uint8_t bEndpointAddress;
    uint8_t bmAttributes;
    uint16_t wMaxPacketSize;
    uint8_t bInterval;
} __attribute__((packed));

struct usb_endpoint_descriptor_long {
    uint8_t bLength;
    uint8_t bDescriptorType;
    uint8_t bEndpointAddress;
    uint8_t bmAttributes;
    uint16_t wMaxPacketSize;
    uint8_t bInterval;
    uint8_t bRefresh;
    uint8_t bSyncAddr;
} __attribute__((packed));

#ifdef __cplusplus
extern "C" {
#endif

#ifdef __cplusplus
}
#endif

#endif /* __HARDWARE_USB_COMMON_H__ */