source: mainline/uspace/drv/hid/usbhid/usbhid.h

/*
 * Copyright (c) 2011 Lubos Slovak
 * Copyright (c) 2018 Petr Manek
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup drvusbhid
 * @{
 */
/** @file
 * USB HID driver API.
 */

#ifndef USB_HID_USBHID_H_
#define USB_HID_USBHID_H_

#include <stdint.h>

#include <usb/hid/hidparser.h>
#include <ddf/driver.h>
#include <usb/dev/pipes.h>
#include <usb/dev/driver.h>
#include <usb/dev/poll.h>
#include <usb/hid/hid.h>
#include <stdbool.h>

typedef struct usb_hid_dev usb_hid_dev_t;
typedef struct usb_hid_subdriver usb_hid_subdriver_t;

/** Subdriver initialization callback.
 *
 * @param dev Backing USB HID device.
 * @param data Custom subdriver data (pointer where to store them).
 * @return Error code.
 */
typedef errno_t (*usb_hid_driver_init_t)(usb_hid_dev_t *dev, void **data);

/** Subdriver deinitialization callback.
 *
 * @param dev Backing USB HID device.
 * @param data Custom subdriver data.
 */
typedef void (*usb_hid_driver_deinit_t)(usb_hid_dev_t *dev, void *data);

/** Subdriver callback on data from device.
 *
 * @param dev Backing USB HID device.
 * @param data Custom subdriver data.
 * @return Whether to continue polling (typically true always).
 */
typedef bool (*usb_hid_driver_poll_t)(usb_hid_dev_t *dev, void *data);

/** Subdriver callback after communication with the device ceased.
 *
 * @param dev Backing USB HID device.
 * @param data Custom subdriver data.
 * @param ended_due_to_errors Whether communication ended due to errors in
 *      communication (true) or deliberately by driver (false).
 */
typedef void (*usb_hid_driver_poll_ended_t)(usb_hid_dev_t *dev, void *data,
    bool ended_due_to_errors);

struct usb_hid_subdriver {
        /** Function to be called when initializing HID device. */
        usb_hid_driver_init_t init;
        /** Function to be called when destroying the HID device structure. */
        usb_hid_driver_deinit_t deinit;
        /** Function to be called when data arrives from the device. */
        usb_hid_driver_poll_t poll;
        /** Function to be called when polling ends. */
        usb_hid_driver_poll_ended_t poll_end;
        /** Arbitrary data needed by the subdriver. */
        void *data;
};

/**
 * Structure for holding general HID device data.
 */
struct usb_hid_dev {
        /** Structure holding generic USB device information. */
        usb_device_t *usb_dev;

        /** Endpont mapping of the polling pipe. */
        usb_endpoint_mapping_t *poll_pipe_mapping;

        /** Device polling structure. */
        usb_polling_t polling;

        /** Subdrivers. */
        usb_hid_subdriver_t *subdrivers;

        /** Number of subdrivers. */
        unsigned subdriver_count;

        /** Report descriptor. */
        uint8_t *report_desc;

        /** Report descriptor size. */
        size_t report_desc_size;

        /** HID Report parser. */
        usb_hid_report_t report;

        uint8_t report_id;

        uint8_t *input_report;

        size_t input_report_size;
        size_t max_input_report_size;

        int report_nr;
        volatile bool running;
};

extern const usb_endpoint_description_t *usb_hid_endpoints[];

errno_t usb_hid_init(usb_hid_dev_t *hid_dev, usb_device_t *dev);

void usb_hid_deinit(usb_hid_dev_t *hid_dev);

void usb_hid_new_report(usb_hid_dev_t *hid_dev);

int usb_hid_report_number(const usb_hid_dev_t *hid_dev);

#endif /* USB_HID_USBHID_H_ */

/**
 * @}
 */