/*!
    \file  usb_std.h
    \brief USB 2.0 standard defines

    \version 2017-06-06, V1.0.0, firmware for GD32F3x0
    \version 2019-06-01, V2.0.0, firmware for GD32F3x0
*/

/*
    Copyright (c) 2019, GigaDevice Semiconductor Inc.

    Redistribution and use in source and binary forms, with or without modification, 
are permitted provided that the following conditions are met:

    1. Redistributions of source code must retain the above copyright notice, this 
       list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright notice, 
       this list of conditions and the following disclaimer in the documentation 
       and/or other materials provided with the distribution.
    3. Neither the name of the copyright holder nor the names of its contributors 
       may be used to endorse or promote products derived from this software without 
       specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 
OF SUCH DAMAGE.
*/

#ifndef USB_STD_H
#define USB_STD_H

#include "usb_conf.h"

#define USB_DEV_QUALIFIER_DESC_LEN                     0x0AU       /*!< USB device qualifier descriptor length */
#define USB_DEV_DESC_LEN                               0x12U       /*!< USB device descriptor length */
#define USB_CFG_DESC_LEN                               0x09U       /*!< USB device configuration descriptor length */
#define USB_IF_DESC_LEN                                0x09U       /*!< USB device interface descriptor length */
#define USB_EP_DESC_LEN                                0x07U       /*!< USB device endpoint descriptor length */
#define USB_OTG_DESC_LEN                               0x03U       /*!< USB device OTG descriptor length */

/* bit 7 of bmRequestType: data phase transfer direction */
#define USB_DIR_MASK                                   0x80U       /*!< USB transfer direction mask */
#define USB_DIR_OUT                                    0x00U       /*!< USB transfer OUT direction */
#define USB_DIR_IN                                     0x80U       /*!< USB transfer IN direction */

/* bit 6..5 of bmRequestType: request type */
#define USB_STANDARD_REQ                               0x00U       /*!< USB standard request */
#define USB_CLASS_REQ                                  0x20U       /*!< USB class request */
#define USB_VENDOR_REQ                                 0x40U       /*!< USB vebdor request */
#define USB_REQ_MASK                                   0x60U       /*!< USB request mask */

/* bit 4..0 of bmRequestType: recipient type */
#define USB_REQTYPE_DEVICE                             0x00U       /*!< USB device request type */
#define USB_REQTYPE_INTERFACE                          0x01U       /*!< USB interface request type*/
#define USB_REQTYPE_ENDPOINT                           0x02U       /*!< USB endpoint request type*/
#define USB_REQTYPE_MASK                               0x03U       /*!< USB request type mask*/

/* bRequest value */
#define USBREQ_GET_STATUS                              0x00U       /*!< USB get status request*/
#define USBREQ_CLEAR_FEATURE                           0x01U       /*!< USB clear feature request*/
#define USBREQ_SET_FEATURE                             0x03U       /*!< USB set feature request*/
#define USBREQ_SET_ADDRESS                             0x05U       /*!< USB set address request*/
#define USBREQ_GET_DESCRIPTOR                          0x06U       /*!< USB get descriptor request*/
#define USBREQ_SET_DESCRIPTOR                          0x07U       /*!< USB set descriptor request*/
#define USBREQ_GET_CONFIGURATION                       0x08U       /*!< USB get configuration request*/
#define USBREQ_SET_CONFIGURATION                       0x09U       /*!< USB set configuration request*/
#define USBREQ_GET_INTERFACE                           0x0AU       /*!< USB get interface request*/
#define USBREQ_SET_INTERFACE                           0x0BU       /*!< USB set interface request*/
#define USBREQ_SYNCH_FRAME                             0x0CU       /*!< USB synchronize frame request*/

/* descriptor types of usb specifications */
#define USB_DESCTYPE_DEVICE                            0x01U       /*!< USB device descriptor type*/
#define USB_DESCTYPE_CONFIGURATION                     0x02U       /*!< USB configuration descriptor type*/
#define USB_DESCTYPE_STRING                            0x03U       /*!< USB string descriptor type*/
#define USB_DESCTYPE_INTERFACE                         0x04U       /*!< USB interface descriptor type*/
#define USB_DESCTYPE_ENDPOINT                          0x05U       /*!< USB endpoint descriptor type*/
#define USB_DESCTYPE_DEVICE_QUALIFIER                  0x06U       /*!< USB device qualtfier descriptor type*/
#define USB_DESCTYPE_OTHER_SPEED_CONFIGURATION         0x07U       /*!< USB other speed configuration descriptor type*/
#define USB_DESCTYPE_INTERFACE_POWER                   0x08U       /*!< USB interface power descriptor type*/

#define USB_DESCTYPE_HID                               0x21U       /*!< USB HID descriptor type*/
#define USB_DESCTYPE_HID_REPORT                        0x22U       /*!< USB HID report descriptor type*/

#define USB_DEVDESC_SIZE                               18U         /*!< USB device descriptor size*/
#define USB_CFGDESC_SIZE                               9U          /*!< USB configure descriptor size*/
#define USB_INTDESC_SIZE                               9U          /*!< USB interface descriptor size*/
#define USB_EPDESC_SIZE                                7U          /*!< USB endpoint descriptor size*/

/* descriptor type and descriptor index  */
/* use the following values when USB host need to get descriptor  */
#define  USB_DEVDESC                    ((USB_DESCTYPE_DEVICE                    << 8U) & 0xFF00U)  /*!< USB device operation marco */
#define  USB_CFGDESC                    ((USB_DESCTYPE_CONFIGURATION             << 8U) & 0xFF00U)  /*!< USB configuration operation marco */
#define  USB_STRDESC                    ((USB_DESCTYPE_STRING                    << 8U) & 0xFF00U)  /*!< USB string operation marco */
#define  USB_INTDESC                    ((USB_DESCTYPE_INTERFACE                 << 8U) & 0xFF00U)  /*!< USB interface operation marco */
#define  USB_EPDESC                     ((USB_DESCTYPE_INTERFACE                 << 8U) & 0xFF00U)  /*!< USB endpoint operation marco */
#define  USB_DEVQUADESC                 ((USB_DESCTYPE_DEVICE_QUALIFIER          << 8U) & 0xFF00U)  /*!< USB device qualifier operation marco */
#define  USB_OSPCFGDESC                 ((USB_DESCTYPE_OTHER_SPEED_CONFIGURATION << 8U) & 0xFF00U)  /*!< USB other speed configuration operation marco */
#define  USB_INTPWRDESC                 ((USB_DESCTYPE_INTERFACE_POWER           << 8U) & 0xFF00U)  /*!< USB interface power operation marco */
#define  USB_HIDREPDESC                 ((USB_DESCTYPE_HID_REPORT                << 8U) & 0xFF00U)  /*!< USB HID report operation marco */
#define  USB_HIDDESC                    ((USB_DESCTYPE_HID                       << 8U) & 0xFF00U)  /*!< USB HID operation marco */

#define SWAPBYTE(addr)       (((uint16_t)(*((uint8_t *)(addr)))) + \
                             (uint16_t)(((uint16_t)(*(((uint8_t *)(addr)) + 1U))) << 8U))

/* supported classes */
#define USB_MSC_CLASS                                   0x08U     /*!< USB MSC class*/
#define USB_HID_CLASS                                   0x03U     /*!< USB HID class*/

/* interface descriptor field values for hid boot protocol */
#define HID_BOOT_CODE                                   0x01U     /*!< USB HID boot code*/
#define HID_KEYBRD_BOOT_CODE                            0x01U     /*!< USB HID keyboard boot code*/
#define HID_MOUSE_BOOT_CODE                             0x02U     /*!< USB HID mouse boot code*/

/* as per usb specs 9.2.6.4 :standard request with data request timeout: 5sec
   standard request with no data stage timeout : 50ms */
#define DATA_STAGE_TIMEOUT                              5000U     /*!< USB data stage timeout*/
#define NODATA_STAGE_TIMEOUT                            50U       /*!< USB no data stage timeout*/

#define USBH_CFG_DESC_SET_SIZE (USB_CFGDESC_SIZE + USB_INTDESC_SIZE \
                                + (USBH_MAX_EP_NUM * USB_EPDESC_SIZE))    /*!< USB host set configuration descriptor size */

#pragma pack(1)

typedef union
{
    uint8_t data[8];

    struct _setup_packet_struct
    {
        uint8_t           bmRequestType;  /*!< type of request */
        uint8_t           bRequest;       /*!< request of setup packet */
        uint16_t          wValue;         /*!< value of setup packet */
        uint16_t          wIndex;         /*!< index of setup packet */
        uint16_t          wLength;        /*!< length of setup packet */
    } b;
}usb_setup_union;

typedef struct
{
    uint8_t bLength;                      /*!< size of the descriptor */
    uint8_t bDescriptorType;              /*!< type of the descriptor */
} usb_descriptor_header_struct;

typedef struct
{
    usb_descriptor_header_struct Header;  /*!< descriptor header, including type and size */

    uint16_t bcdUSB;                      /*!< BCD of the supported USB specification */
    uint8_t  bDeviceClass;                /*!< USB device class */
    uint8_t  bDeviceSubClass;             /*!< USB device subclass */
    uint8_t  bDeviceProtocol;             /*!< USB device protocol */
    uint8_t  bMaxPacketSize0;             /*!< size of the control (address 0) endpoint's bank in bytes */
    uint16_t idVendor;                    /*!< vendor ID for the USB product */
    uint16_t idProduct;                   /*!< unique product ID for the USB product */
    uint16_t bcdDevice;                   /*!< product release (version) number */
    uint8_t  iManufacturer;               /*!< string index for the manufacturer's name */
    uint8_t  iProduct;                    /*!< string index for the product name/details */
    uint8_t  iSerialNumber;               /*!< string index for the product's globally unique hexadecimal serial number */
    uint8_t  bNumberConfigurations;       /*!< total number of configurations supported by the device */
} usb_descriptor_device_struct;

typedef struct
{
    usb_descriptor_header_struct Header;  /*!< descriptor header, including type and size */

    uint16_t wTotalLength;                /*!< size of the configuration descriptor header,and all sub descriptors inside the configuration */
    uint8_t  bNumInterfaces;              /*!< total number of interfaces in the configuration */
    uint8_t  bConfigurationValue;         /*!< configuration index of the current configuration */
    uint8_t  iConfiguration;              /*!< index of a string descriptor describing the configuration */
    uint8_t  bmAttributes;                /*!< configuration attributes */
    uint8_t  bMaxPower;                   /*!< maximum power consumption of the device while in the current configuration */
} usb_descriptor_configuration_struct;

typedef struct
{
    usb_descriptor_header_struct Header;  /*!< descriptor header, including type and size */

    uint8_t bInterfaceNumber;             /*!< index of the interface in the current configuration */
    uint8_t bAlternateSetting;            /*!< alternate setting for the interface number */
    uint8_t bNumEndpoints;                /*!< total number of endpoints in the interface */
    uint8_t bInterfaceClass;              /*!< interface class ID */
    uint8_t bInterfaceSubClass;           /*!< interface subclass ID */
    uint8_t bInterfaceProtocol;           /*!< interface protocol ID */
    uint8_t iInterface;                   /*!< index of the string descriptor describing the interface */
} usb_descriptor_interface_struct;

typedef struct
{
    usb_descriptor_header_struct Header;  /*!< descriptor header, including type and size. */

    uint8_t  bEndpointAddress;            /*!< logical address of the endpoint */
    uint8_t  bmAttributes;                /*!< endpoint attributes */
    uint16_t wMaxPacketSize;              /*!< size of the endpoint bank, in bytes */
    uint8_t  bInterval;                   /*!< polling interval in milliseconds for the endpoint if it is an INTERRUPT or ISOCHRONOUS type */
} usb_descriptor_endpoint_struct;

typedef struct
{
    usb_descriptor_header_struct Header;  /*!< descriptor header, including type and size. */
    uint16_t wLANGID;                     /*!< LANGID code */
}usb_descriptor_language_id_struct;

#pragma pack()

#endif /* USB_STD_H */