source: mainline/uspace/srv/hid/input/proto/mousedev.c

/*
 * Copyright (c) 2021 Jiri Svoboda
 * Copyright (c) 2011 Martin Decky
 * 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 mouse_proto
 * @ingroup input
 * @{
 */
/**
 * @file
 * @brief Mouse device connector controller driver.
 */

#include <stdio.h>
#include <vfs/vfs_sess.h>
#include <async.h>
#include <errno.h>
#include <ipc/mouseev.h>
#include <loc.h>
#include <stdlib.h>
#include <time.h>
#include "../mouse.h"
#include "../mouse_port.h"
#include "../mouse_proto.h"
#include "../input.h"

enum {
        /** Default double-click speed in milliseconds */
        dclick_delay_ms = 500
};

/** Mousedev softstate */
typedef struct {
        /** Link to generic mouse device */
        mouse_dev_t *mouse_dev;
        /** Button number of last button pressed (or -1 if none) */
        int press_bnum;
        /** Time at which button was last pressed */
        struct timespec press_time;
} mousedev_t;

static mousedev_t *mousedev_new(mouse_dev_t *mdev)
{
        mousedev_t *mousedev = calloc(1, sizeof(mousedev_t));
        if (mousedev == NULL)
                return NULL;

        mousedev->mouse_dev = mdev;
        mousedev->press_bnum = -1;

        return mousedev;
}

static void mousedev_destroy(mousedev_t *mousedev)
{
        free(mousedev);
}

static void mousedev_press(mousedev_t *mousedev, int bnum)
{
        struct timespec now;
        nsec_t ms_delay;

        getuptime(&now);

        /* Same button was pressed previously */
        if (mousedev->press_bnum == bnum) {
                /* Compute milliseconds since previous press */
                ms_delay = ts_sub_diff(&now, &mousedev->press_time) / 1000000;

                if (ms_delay <= dclick_delay_ms) {
                        mouse_push_event_dclick(mousedev->mouse_dev, bnum);
                        mousedev->press_bnum = -1;
                        return;
                }
        }

        /* Record which button was last pressed and at what time */
        mousedev->press_bnum = bnum;
        mousedev->press_time = now;
}

static void mousedev_callback_conn(ipc_call_t *icall, void *arg)
{
        /* Mousedev device structure */
        mousedev_t *mousedev = (mousedev_t *) arg;

        while (true) {
                ipc_call_t call;
                async_get_call(&call);

                if (!ipc_get_imethod(&call)) {
                        async_answer_0(&call, EOK);
                        mousedev_destroy(mousedev);
                        return;
                }

                errno_t retval;

                switch (ipc_get_imethod(&call)) {
                case MOUSEEV_MOVE_EVENT:
                        mouse_push_event_move(mousedev->mouse_dev,
                            ipc_get_arg1(&call), ipc_get_arg2(&call),
                            ipc_get_arg3(&call));
                        retval = EOK;
                        break;
                case MOUSEEV_ABS_MOVE_EVENT:
                        mouse_push_event_abs_move(mousedev->mouse_dev,
                            ipc_get_arg1(&call), ipc_get_arg2(&call),
                            ipc_get_arg3(&call), ipc_get_arg4(&call));
                        retval = EOK;
                        break;
                case MOUSEEV_BUTTON_EVENT:
                        mouse_push_event_button(mousedev->mouse_dev,
                            ipc_get_arg1(&call), ipc_get_arg2(&call));
                        if (ipc_get_arg2(&call) != 0)
                                mousedev_press(mousedev, ipc_get_arg1(&call));
                        retval = EOK;
                        break;
                default:
                        retval = ENOTSUP;
                        break;
                }

                async_answer_0(&call, retval);
        }
}

static errno_t mousedev_proto_init(mouse_dev_t *mdev)
{
        async_sess_t *sess = loc_service_connect(mdev->svc_id, INTERFACE_DDF, 0);
        if (sess == NULL) {
                printf("%s: Failed starting session with '%s'\n", NAME,
                    mdev->svc_name);
                return ENOENT;
        }

        mousedev_t *mousedev = mousedev_new(mdev);
        if (mousedev == NULL) {
                printf("%s: Failed allocating device structure for '%s'.\n",
                    NAME, mdev->svc_name);
                async_hangup(sess);
                return ENOMEM;
        }

        async_exch_t *exch = async_exchange_begin(sess);
        if (exch == NULL) {
                printf("%s: Failed starting exchange with '%s'.\n", NAME,
                    mdev->svc_name);
                mousedev_destroy(mousedev);
                async_hangup(sess);
                return ENOENT;
        }

        port_id_t port;
        errno_t rc = async_create_callback_port(exch, INTERFACE_MOUSE_CB, 0, 0,
            mousedev_callback_conn, mousedev, &port);

        async_exchange_end(exch);
        async_hangup(sess);

        if (rc != EOK) {
                printf("%s: Failed creating callback connection from '%s'.\n",
                    NAME, mdev->svc_name);
                mousedev_destroy(mousedev);
                return rc;
        }

        return EOK;
}

mouse_proto_ops_t mousedev_proto = {
        .init = mousedev_proto_init
};

/**
 * @}
 */