source: mainline/uspace/srv/hid/input/proto/mousedev.c@ 1875a0c

/*
 * 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 <fcntl.h>
#include <vfs/vfs_sess.h>
#include <malloc.h>
#include <async.h>
#include <errno.h>
#include <ipc/mouseev.h>
#include <input.h>
#include <mouse.h>
#include <mouse_port.h>
#include <mouse_proto.h>

/** Mousedev softstate */
typedef struct {
        /** Link to generic mouse device */
        mouse_dev_t *mouse_dev;
        
        /** Session to mouse device */
        async_sess_t *sess;
        
        /** File descriptor of open mousedev device */
        int fd;
} 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->fd = -1;
        
        return mousedev;
}

static void mousedev_destroy(mousedev_t *mousedev)
{
        if (mousedev->sess != NULL)
                async_hangup(mousedev->sess);
        
        if (mousedev->fd >= 0)
                close(mousedev->fd);
        
        free(mousedev);
}

static void mousedev_callback_conn(ipc_callid_t iid, ipc_call_t *icall,
    void *arg)
{
        /* Mousedev device structure */
        mousedev_t *mousedev = (mousedev_t *) arg;
        
        while (true) {
                ipc_call_t call;
                ipc_callid_t callid = async_get_call(&call);
                
                if (!IPC_GET_IMETHOD(call)) {
                        /* XXX Handle hangup */
                        return;
                }
                
                int 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));
                        retval = EOK;
                        break;
                case MOUSEEV_BUTTON_EVENT:
                        mouse_push_event_button(mousedev->mouse_dev, IPC_GET_ARG1(call),
                            IPC_GET_ARG2(call));
                        retval = EOK;
                        break;
                default:
                        retval = ENOTSUP;
                        break;
                }
                
                async_answer_0(callid, retval);
        }
}

static int mousedev_proto_init(mouse_dev_t *mdev)
{
        const char *pathname = mdev->dev_path;
        
        int fd = open(pathname, O_RDWR);
        if (fd < 0)
                return -1;
        
        async_sess_t *sess = fd_session(EXCHANGE_SERIALIZE, fd);
        if (sess == NULL) {
                printf("%s: Failed starting session with '%s'\n", NAME, pathname);
                close(fd);
                return -1;
        }
        
        mousedev_t *mousedev = mousedev_new(mdev);
        if (mousedev == NULL) {
                printf("%s: Failed allocating device structure for '%s'.\n",
                    NAME, pathname);
                return -1;
        }
        
        mousedev->fd = fd;
        mousedev->sess = sess;
        
        async_exch_t *exch = async_exchange_begin(sess);
        if (exch == NULL) {
                printf("%s: Failed starting exchange with '%s'.\n", NAME, pathname);
                mousedev_destroy(mousedev);
                return -1;
        }
        
        int rc = async_connect_to_me(exch, 0, 0, 0, mousedev_callback_conn, mousedev);
        async_exchange_end(exch);
        
        if (rc != EOK) {
                printf("%s: Failed creating callback connection from '%s'.\n",
                    NAME, pathname);
                mousedev_destroy(mousedev);
                return -1;
        }
        
        return 0;
}

mouse_proto_ops_t mousedev_proto = {
        .init = mousedev_proto_init
};

/**
 * @}
 */