/*
 * Copyright (c) 2024, sakumisu
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include "usbd_core.h"
#include "usbd_dfu.h"

#define USBD_VID           0x0483
#define USBD_PID           0xDF11
#define USBD_MAX_POWER     100
#define USBD_LANGID_STRING 1033

#define FLASH_DESC_STR "@Internal Flash   /0x08000000/16*001Ka,112*01Kg"

#define USB_CONFIG_SIZE (9 + 9 + 9)

#ifdef CONFIG_USBDEV_ADVANCE_DESC
static const uint8_t device_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0200, 0x01)
};

static const uint8_t config_descriptor[] = {
    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
    DFU_DESCRIPTOR_INIT()
};

static const uint8_t device_quality_descriptor[] = {
    ///////////////////////////////////////
    /// device qualifier descriptor
    ///////////////////////////////////////
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x00,
    0x00,
};

static const char *string_descriptors[] = {
    (const char[]){ 0x09, 0x04 }, /* Langid */
    "CherryUSB",                  /* Manufacturer */
    "CherryUSB DFU DEMO",         /* Product */
    "2022123456",                 /* Serial Number */
};

static const uint8_t *device_descriptor_callback(uint8_t speed)
{
    return device_descriptor;
}

static const uint8_t *config_descriptor_callback(uint8_t speed)
{
    return config_descriptor;
}

static const uint8_t *device_quality_descriptor_callback(uint8_t speed)
{
    return device_quality_descriptor;
}

static const char *string_descriptor_callback(uint8_t speed, uint8_t index)
{
    if (index > 3) {
        return NULL;
    }
    return string_descriptors[index];
}

const struct usb_descriptor dfu_flash_descriptor = {
    .device_descriptor_callback = device_descriptor_callback,
    .config_descriptor_callback = config_descriptor_callback,
    .device_quality_descriptor_callback = device_quality_descriptor_callback,
    .string_descriptor_callback = string_descriptor_callback
};
#else
const uint8_t dfu_flash_descriptor[] = {
    USB_DEVICE_DESCRIPTOR_INIT(USB_2_0, 0x00, 0x00, 0x00, USBD_VID, USBD_PID, 0x0200, 0x01),
    USB_CONFIG_DESCRIPTOR_INIT(USB_CONFIG_SIZE, 0x01, 0x01, USB_CONFIG_BUS_POWERED, USBD_MAX_POWER),
    DFU_DESCRIPTOR_INIT(),
    ///////////////////////////////////////
    /// string0 descriptor
    ///////////////////////////////////////
    USB_LANGID_INIT(USBD_LANGID_STRING),
    ///////////////////////////////////////
    /// string1 descriptor
    ///////////////////////////////////////
    0x14,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'C', 0x00,                  /* wcChar0 */
    'h', 0x00,                  /* wcChar1 */
    'e', 0x00,                  /* wcChar2 */
    'r', 0x00,                  /* wcChar3 */
    'r', 0x00,                  /* wcChar4 */
    'y', 0x00,                  /* wcChar5 */
    'U', 0x00,                  /* wcChar6 */
    'S', 0x00,                  /* wcChar7 */
    'B', 0x00,                  /* wcChar8 */
    ///////////////////////////////////////
    /// string2 descriptor
    ///////////////////////////////////////
    0x1e,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    'D', 0x00,                  /* wcChar0 */
    'F', 0x00,                  /* wcChar1 */
    'U', 0x00,                  /* wcChar2 */
    'W', 0x00,                  /* wcChar3 */
    'i', 0x00,                  /* wcChar4 */
    't', 0x00,                  /* wcChar5 */
    'h', 0x00,                  /* wcChar6 */
    's', 0x00,                  /* wcChar7 */
    't', 0x00,                  /* wcChar8 */
    ' ', 0x00,                  /* wcChar9 */
    't', 0x00,                  /* wcChar10 */
    'o', 0x00,                  /* wcChar11 */
    'o', 0x00,                  /* wcChar12 */
    'l', 0x00,                  /* wcChar13 */
    ///////////////////////////////////////
    /// string3 descriptor
    ///////////////////////////////////////
    0x16,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    '2', 0x00,                  /* wcChar0 */
    '0', 0x00,                  /* wcChar1 */
    '2', 0x00,                  /* wcChar2 */
    '2', 0x00,                  /* wcChar3 */
    '1', 0x00,                  /* wcChar4 */
    '2', 0x00,                  /* wcChar5 */
    '3', 0x00,                  /* wcChar6 */
    '4', 0x00,                  /* wcChar7 */
    '5', 0x00,                  /* wcChar8 */
    '6', 0x00,                  /* wcChar9 */
    ///////////////////////////////////////
    /// string4 descriptor
    ///////////////////////////////////////
    0x60,                       /* bLength */
    USB_DESCRIPTOR_TYPE_STRING, /* bDescriptorType */
    '@', 0x00,                  /* wcChar0 */
    'I', 0x00,                  /* wcChar1 */
    'n', 0x00,                  /* wcChar2 */
    't', 0x00,                  /* wcChar3 */
    'e', 0x00,                  /* wcChar4 */
    'r', 0x00,                  /* wcChar5 */
    'n', 0x00,                  /* wcChar6 */
    'a', 0x00,                  /* wcChar7 */
    'l', 0x00,                  /* wcChar8 */
    ' ', 0x00,                  /* wcChar9 */
    'F', 0x00,                  /* wcChar10 */
    'l', 0x00,                  /* wcChar11*/
    'a', 0x00,                  /* wcChar12 */
    's', 0x00,                  /* wcChar13 */
    'h', 0x00,                  /* wcChar14 */
    ' ', 0x00,                  /* wcChar15 */
    ' ', 0x00,                  /* wcChar16 */
    ' ', 0x00,                  /* wcChar17 */
    '/', 0x00,                  /* wcChar18 */
    '0', 0x00,                  /* wcChar19 */
    'x', 0x00,                  /* wcChar20 */
    '0', 0x00,                  /* wcChar21*/
    '8', 0x00,                  /* wcChar22 */
    '0', 0x00,                  /* wcChar23 */
    '0', 0x00,                  /* wcChar24 */
    '0', 0x00,                  /* wcChar25 */
    '0', 0x00,                  /* wcChar26 */
    '0', 0x00,                  /* wcChar27 */
    '0', 0x00,                  /* wcChar28 */
    '/', 0x00,                  /* wcChar29 */
    '1', 0x00,                  /* wcChar30 */
    '6', 0x00,                  /* wcChar31*/
    '*', 0x00,                  /* wcChar32 */
    '0', 0x00,                  /* wcChar33 */
    '0', 0x00,                  /* wcChar34 */
    '1', 0x00,                  /* wcChar35 */
    'K', 0x00,                  /* wcChar36 */
    'a', 0x00,                  /* wcChar37 */
    ',', 0x00,                  /* wcChar38 */
    '1', 0x00,                  /* wcChar39 */
    '1', 0x00,                  /* wcChar40 */
    '2', 0x00,                  /* wcChar41*/
    '*', 0x00,                  /* wcChar42 */
    '0', 0x00,                  /* wcChar43 */
    '1', 0x00,                  /* wcChar44 */
    'K', 0x00,                  /* wcChar45 */
    'g', 0x00,                  /* wcChar46 */

#ifdef CONFIG_USB_HS
    ///////////////////////////////////////
    /// device qualifier descriptor
    ///////////////////////////////////////
    0x0a,
    USB_DESCRIPTOR_TYPE_DEVICE_QUALIFIER,
    0x00,
    0x02,
    0x00,
    0x00,
    0x00,
    0x40,
    0x00,
    0x00,
#endif
    0x00
};
#endif

static void usbd_event_handler(uint8_t busid, uint8_t event)
{
    switch (event) {
        case USBD_EVENT_RESET:
            break;
        case USBD_EVENT_CONNECTED:
            break;
        case USBD_EVENT_DISCONNECTED:
            break;
        case USBD_EVENT_RESUME:
            break;
        case USBD_EVENT_SUSPEND:
            break;
        case USBD_EVENT_CONFIGURED:
            break;
        case USBD_EVENT_SET_REMOTE_WAKEUP:
            break;
        case USBD_EVENT_CLR_REMOTE_WAKEUP:
            break;

        default:
            break;
    }
}

struct usbd_interface intf0;

void dfu_flash_init(uint8_t busid, uintptr_t reg_base)
{
#ifdef CONFIG_USBDEV_ADVANCE_DESC
    usbd_desc_register(busid, &dfu_flash_descriptor);
#else
    usbd_desc_register(busid, dfu_flash_descriptor);
#endif
    usbd_add_interface(busid, usbd_dfu_init_intf(&intf0));
    usbd_initialize(busid, reg_base, usbd_event_handler);
}