/*
 * USB Mass Storage Device emulation
 *
 * Copyright (c) 2006 CodeSourcery.
 * Written by Paul Brook
 *
 * This code is licensed under the LGPL.
 */

#include "hw/usb.h"
#include "hw/scsi/scsi.h"

enum USBMSDMode {
    USB_MSDM_CBW, /* Command Block.  */
    USB_MSDM_DATAOUT, /* Transfer data to device.  */
    USB_MSDM_DATAIN, /* Transfer data from device.  */
    USB_MSDM_CSW /* Command Status.  */
};

struct QEMU_PACKED usb_msd_csw {
    uint32_t sig;
    uint32_t tag;
    uint32_t residue;
    uint8_t status;
};

struct MSDState {
    USBDevice dev;
    enum USBMSDMode mode;
    uint32_t scsi_off;
    uint32_t scsi_len;
    uint32_t data_len;
    struct usb_msd_csw csw;
    SCSIRequest *req;
    SCSIBus bus;
    /* For async completion.  */
    USBPacket *packet;
    /* usb-storage only */
    BlockConf conf;
    bool removable;
    bool commandlog;
    SCSIDevice *scsi_dev;
    bool needs_reset;
};

typedef struct MSDState MSDState;
#define TYPE_USB_STORAGE "usb-storage-dev"
DECLARE_INSTANCE_CHECKER(MSDState, USB_STORAGE_DEV,
                         TYPE_USB_STORAGE)

void usb_msd_transfer_data(SCSIRequest *req, uint32_t len);
void usb_msd_command_complete(SCSIRequest *req, size_t resid);
void usb_msd_request_cancelled(SCSIRequest *req);
void *usb_msd_load_request(QEMUFile *f, SCSIRequest *req);
void usb_msd_handle_reset(USBDevice *dev);