/*
 * Copyright (c) 2024, sakumisu
 *
 * SPDX-License-Identifier: Apache-2.0
 */
#include "usbd_core.h"
#include "usbd_msc.h"
#include "bootuf2.h"

#define MSC_IN_EP  0x81
#define MSC_OUT_EP 0x02

#define USBD_VID           0xFFFF
#define USBD_PID           0xFFFF
#define USBD_MAX_POWER     100
#define USBD_LANGID_STRING 1033

#define USB_CONFIG_SIZE (9 + MSC_DESCRIPTOR_LEN)

#ifdef CONFIG_USB_HS
#define MSC_MAX_MPS 512
#else
#define MSC_MAX_MPS 64
#endif

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),
    MSC_DESCRIPTOR_INIT(0x00, MSC_OUT_EP, MSC_IN_EP, MSC_MAX_MPS, 0x02)
};

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 UF2 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 msc_bootuf2_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
};

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:
            bootuf2_init();
            break;
        case USBD_EVENT_SET_REMOTE_WAKEUP:
            break;
        case USBD_EVENT_CLR_REMOTE_WAKEUP:
            break;

        default:
            break;
    }
}

void usbd_msc_get_cap(uint8_t busid, uint8_t lun, uint32_t *block_num, uint32_t *block_size)
{
    *block_num = bootuf2_get_sector_count();
    *block_size = bootuf2_get_sector_size();

    USB_LOG_INFO("sector count:%d, sector size:%d\n", (unsigned int)*block_num, (unsigned int)*block_size);
}
int usbd_msc_sector_read(uint8_t busid, uint8_t lun, uint32_t sector, uint8_t *buffer, uint32_t length)
{
    boot2uf2_read_sector(sector, buffer, length / bootuf2_get_sector_size());
    return 0;
}

int usbd_msc_sector_write(uint8_t busid, uint8_t lun, uint32_t sector, uint8_t *buffer, uint32_t length)
{
    bootuf2_write_sector(sector, buffer, length / bootuf2_get_sector_size());
    return 0;
}

static struct usbd_interface intf0;

void msc_bootuf2_init(uint8_t busid, uintptr_t reg_base)
{
    boot2uf2_flash_init();

    usbd_desc_register(busid, &msc_bootuf2_descriptor);

    usbd_add_interface(busid, usbd_msc_init_intf(busid, &intf0, MSC_OUT_EP, MSC_IN_EP));

    usbd_initialize(busid, reg_base, usbd_event_handler);
}

void boot2uf2_flash_init(void)
{
}

int bootuf2_flash_write(uint32_t address, const uint8_t *data, size_t size)
{
    USB_LOG_INFO("address:%08x, size:%d\n", (unsigned int)address, (unsigned int)size);
    return 0;
}