source: mainline/uspace/drv/usbmouse/mouse.c@ 6143ce3

/*
 * Copyright (c) 2011 Vojtech Horky
 * 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 drvusbmouse
 * @{
 */
/**
 * @file
 * Actual handling of USB mouse protocol.
 */
#include "mouse.h"
#include <usb/debug.h>
#include <errno.h>
#include <str_error.h>
#include <ipc/mouse.h>

/** Fibril function for polling the mouse device.
 *
 * This function shall not terminate unless the device breaks and fails
 * to send data (e.g. stalls on data request).
 *
 * @param arg ddf_dev_t type representing the mouse device.
 * @return EOK Always.
 */
int usb_mouse_polling_fibril(void *arg)
{
        assert(arg != NULL);
        ddf_dev_t *dev = (ddf_dev_t *) arg;
        usb_mouse_t *mouse = (usb_mouse_t *) dev->driver_data;

        assert(mouse);

        size_t buffer_size = mouse->poll_pipe.max_packet_size;

        if (buffer_size < 4) {
                usb_log_error("Weird mouse, results will be skewed.\n");
                buffer_size = 4;
        }

        uint8_t *buffer = malloc(buffer_size);
        if (buffer == NULL) {
                usb_log_error("Out of memory, poll fibril aborted.\n");
                return ENOMEM;
        }

        while (true) {
                async_usleep(mouse->poll_interval_us);

                size_t actual_size;
                int rc;

                /*
                 * Error checking note:
                 * - failure when starting a session is considered
                 *   temporary (e.g. out of phones, next try might succeed)
                 * - failure of transfer considered fatal (probably the
                 *   device was unplugged)
                 * - session closing not checked (shall not fail anyway)
                 */

                rc = usb_endpoint_pipe_start_session(&mouse->poll_pipe);
                if (rc != EOK) {
                        usb_log_warning("Failed to start session, will try again: %s.\n",
                            str_error(rc));
                        continue;
                }

                rc = usb_endpoint_pipe_read(&mouse->poll_pipe,
                    buffer, buffer_size, &actual_size);

                usb_endpoint_pipe_end_session(&mouse->poll_pipe);

                if (rc != EOK) {
                        usb_log_error("Failed reading mouse input: %s.\n",
                            str_error(rc));
                        break;
                }

                usb_log_debug2("got buffer: %s.\n",
                    usb_debug_str_buffer(buffer, buffer_size, 0));

                uint8_t butt = buffer[0];
                char str_buttons[4] = {
                        butt & 1 ? '#' : '.',
                        butt & 2 ? '#' : '.',
                        butt & 4 ? '#' : '.',
                        0
                };

                int shift_x = ((int) buffer[1]) - 127;
                int shift_y = ((int) buffer[2]) - 127;
                int wheel = ((int) buffer[3]) - 127;

                if (buffer[1] == 0) {
                        shift_x = 0;
                }
                if (buffer[2] == 0) {
                        shift_y = 0;
                }
                if (buffer[3] == 0) {
                        wheel = 0;
                }

                if (mouse->console_phone >= 0) {
                        if ((shift_x != 0) || (shift_y != 0)) {
                                /* FIXME: guessed for QEMU */
                                async_req_2_0(mouse->console_phone,
                                    MEVENT_MOVE,
                                    - shift_x / 10,  - shift_y / 10);
                        }
                        if (butt) {
                                /* FIXME: proper button clicking. */
                                async_req_2_0(mouse->console_phone,
                                    MEVENT_BUTTON, 1, 1);
                                async_req_2_0(mouse->console_phone,
                                    MEVENT_BUTTON, 1, 0);
                        }
                }

                usb_log_debug("buttons=%s  dX=%+3d  dY=%+3d  wheel=%+3d\n",
                   str_buttons, shift_x, shift_y, wheel);
        }

        /*
         * Device was probably unplugged.
         * Hang-up the phone to the console.
         * FIXME: release allocated memory.
         */
        async_hangup(mouse->console_phone);
        mouse->console_phone = -1;

        usb_log_error("Mouse polling fibril terminated.\n");

        return EOK;
}


/**
 * @}
 */