/* SPDX-License-Identifier: GPL-2.0 */
/*
 * This header declares the utility functions used by "Gadget Zero", plus
 * interfaces to its two single-configuration function drivers.
 */

#ifndef __G_ZERO_H
#define __G_ZERO_H

#define GZERO_BULK_BUFLEN       4096
#define GZERO_QLEN              32
#define GZERO_ISOC_INTERVAL     4
#define GZERO_ISOC_MAXPACKET    1024
#define GZERO_SS_BULK_QLEN      1
#define GZERO_SS_ISO_QLEN       8

struct usb_zero_options {
        unsigned pattern;
        unsigned isoc_interval;
        unsigned isoc_maxpacket;
        unsigned isoc_mult;
        unsigned isoc_maxburst;
        unsigned bulk_buflen;
        unsigned qlen;
        unsigned ss_bulk_qlen;
        unsigned ss_iso_qlen;
};

struct f_ss_opts {
        struct usb_function_instance func_inst;
        unsigned pattern;
        unsigned isoc_interval;
        unsigned isoc_maxpacket;
        unsigned isoc_mult;
        unsigned isoc_maxburst;
        unsigned bulk_buflen;
        unsigned bulk_maxburst;
        unsigned bulk_qlen;
        unsigned iso_qlen;

        /*
         * Read/write access to configfs attributes is handled by configfs.
         *
         * This is to protect the data from concurrent access by read/write
         * and create symlink/remove symlink.
         */
        struct mutex                    lock;
        int                             refcnt;
};

struct f_lb_opts {
        struct usb_function_instance func_inst;
        unsigned bulk_buflen;
        unsigned qlen;

        /*
         * Read/write access to configfs attributes is handled by configfs.
         *
         * This is to protect the data from concurrent access by read/write
         * and create symlink/remove symlink.
         */
        struct mutex                    lock;
        int                             refcnt;
};

void lb_modexit(void);
int lb_modinit(void);

/* common utilities */
void disable_endpoints(struct usb_composite_dev *cdev,
                struct usb_ep *in, struct usb_ep *out,
                struct usb_ep *iso_in, struct usb_ep *iso_out);

#endif /* __G_ZERO_H */