#include "usbd_core.h"

#ifndef USBD_IRQHandler
#define USBD_IRQHandler USB_FS_Handler //use actual usb irq name instead
#endif

#ifndef USB_NUM_BIDIR_ENDPOINTS
#define USB_NUM_BIDIR_ENDPOINTS 5
#endif

/* Endpoint state */
struct usb_dc_ep_state {
    /** Endpoint max packet size */
    uint16_t ep_mps;
    /** Endpoint Transfer Type.
     * May be Bulk, Interrupt, Control or Isochronous
     */
    uint8_t ep_type;
    uint8_t ep_stalled; /** Endpoint stall flag */
};

/* Driver state */
struct xxx_udc {
    volatile uint8_t dev_addr;
    struct usb_dc_ep_state in_ep[USB_NUM_BIDIR_ENDPOINTS];  /*!< IN endpoint parameters*/
    struct usb_dc_ep_state out_ep[USB_NUM_BIDIR_ENDPOINTS]; /*!< OUT endpoint parameters */
} g_xxx_udc;

__WEAK void usb_dc_low_level_init(void)
{
}

__WEAK void usb_dc_low_level_deinit(void)
{
}

int usb_dc_init(void)
{
    memset(&g_xxx_udc, 0, sizeof(struct xxx_udc));

    usb_dc_low_level_init();
    return 0;
}

int usb_dc_deinit(void)
{
    return 0;
}

int usbd_set_address(const uint8_t addr)
{
    return 0;
}

int usbd_ep_open(const struct usbd_endpoint_cfg *ep_cfg)
{
    uint8_t ep_idx = USB_EP_GET_IDX(ep_cfg->ep_addr);

    if (USB_EP_DIR_IS_OUT(ep_cfg->ep_addr)) {
        g_xxx_udc.out_ep[ep_idx].ep_mps = ep_cfg->ep_mps;
        g_xxx_udc.out_ep[ep_idx].ep_type = ep_cfg->ep_type;
    } else {
        g_xxx_udc.in_ep[ep_idx].ep_mps = ep_cfg->ep_mps;
        g_xxx_udc.in_ep[ep_idx].ep_type = ep_cfg->ep_type;
    }
    return 0;
}

int usbd_ep_close(const uint8_t ep)
{
    return 0;
}

int usbd_ep_set_stall(const uint8_t ep)
{
    return 0;
}

int usbd_ep_clear_stall(const uint8_t ep)
{
    return 0;
}

int usbd_ep_is_stalled(const uint8_t ep, uint8_t *stalled)
{
    return 0;
}

int usbd_ep_write(const uint8_t ep, const uint8_t *data, uint32_t data_len, uint32_t *ret_bytes)
{
    uint8_t ep_idx = USB_EP_GET_IDX(ep);

    if (!data && data_len) {
        return -1;
    }

    if (!data_len) {
        return 0;
    }

    if (data_len > g_xxx_udc.in_ep[ep_idx].ep_mps) {
        data_len = g_xxx_udc.in_ep[ep_idx].ep_mps;
    }

    if (ret_bytes) {
        *ret_bytes = data_len;
    }

    return 0;
}

int usbd_ep_read(const uint8_t ep, uint8_t *data, uint32_t max_data_len, uint32_t *read_bytes)
{
    uint8_t ep_idx = USB_EP_GET_IDX(ep);
    uint32_t read_count;

    if (!data && max_data_len) {
        return -1;
    }

    if (!max_data_len) {
        return 0;
    }

    if (read_bytes) {
        *read_bytes = read_count;
    }

    return 0;
}

void USBD_IRQHandler(void)
{
}