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/*
* This file is part of the libpayload project.
*
* Copyright (C) 2017 Patrick Rudolph <siro@das-labor.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
* 3. 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
#include <libpayload-config.h>
#include <libpayload.h>
#include <usb/usb.h>
static struct mouse_cursor_input_driver *cursor_in;
static int
mouse_cursor_driver_exists(const struct mouse_cursor_input_driver *const in)
{
struct mouse_cursor_input_driver *head = cursor_in;
while (head) {
if (head == in)
return 1;
head = head->next;
}
return 0;
}
/** Add new mouse cursor input driver */
void mouse_cursor_add_input_driver(struct mouse_cursor_input_driver *const in)
{
/* Check if this driver was already added to the console list */
if (mouse_cursor_driver_exists(in))
return;
in->next = cursor_in;
cursor_in = in;
}
/** Init enabled mouse cursor drivers */
void mouse_cursor_init(void)
{
#if IS_ENABLED(CONFIG_LP_PC_MOUSE)
i8042_mouse_init();
#endif
}
static u32 mouse_buttons;
static u8 mouse_acceleration = 0x10;
/* Fixed-point 1/256 units */
static int mouse_rel_x;
static int mouse_rel_y;
static int mouse_rel_z;
static u32 mouse_speed = 0x299;
/** Test for fast moving cursor */
static u8 mouse_cusor_is_fast(int x, int y)
{
return (x * x + y * y) > (mouse_acceleration * mouse_acceleration);
}
/**
* Poll for mouse data.
*
* Polls all drivers for new mouse data.
* Applies accelerations to relative movement.
* Logical ORs all buttons states.
* Call often to prevent driver's queue overrun !
*/
void mouse_cursor_poll(void)
{
struct mouse_cursor_input_driver *in;
int rel_x, rel_y, rel_z;
u32 buttons;
mouse_buttons = 0;
/* Iterate over all connected drivers */
for (in = cursor_in; in != NULL; in = in->next)
if (in->get_state) {
in->get_state(&rel_x, &rel_y, &rel_z, &buttons);
/* Accumulate relative movement */
if (mouse_cusor_is_fast(rel_x, rel_y)) {
/* Apply simple cursor acceleration. Default: x2.6 */
mouse_rel_x += rel_x * mouse_speed;
mouse_rel_y += rel_y * mouse_speed;
mouse_rel_z += rel_z * mouse_speed;
} else {
mouse_rel_x += rel_x * 256;
mouse_rel_y += rel_y * 256;
mouse_rel_z += rel_z * 256;
}
/* Logic or all buttons */
mouse_buttons |= buttons;
}
}
/**
* Get relative mouse movement.
*
* Returns relative mouse movement with acceleration
* applied. The internal state will be cleared and stays
* clear until one of the drivers provide motion input again.
*/
void mouse_cursor_get_rel(int *x, int *y, int *z)
{
mouse_cursor_poll();
if (x) {
*x = mouse_rel_x / 256;
mouse_rel_x = 0;
}
if (y) {
*y = mouse_rel_y / 256;
mouse_rel_y = 0;
}
if (z) {
*z = mouse_rel_z / 256;
mouse_rel_z = 0;
}
}
/**
* Get mouse button state.
*
* Returns the current button states.
* There are up to 32 possible buttons,
* but most devices only implement three buttons.
*/
u32 mouse_cursor_get_buttons(void)
{
mouse_cursor_poll();
return mouse_buttons;
}
/**
* Set cursor speed.
*
* Sets the mouse cursor speed coefficient.
* It is used in case the cursor is moving faster
* than the mouse acceleration coefficient.
*/
void mouse_cursor_set_speed(u32 val)
{
mouse_speed = val;
}
/**
* Get cursor speed.
*
* Returns the internal mouse cursor speed in
* 1/256th units.
* Default: 0x299 ~ 2.6
*/
u32 mouse_cursor_get_speed(void)
{
return mouse_speed;
}
/**
* Set cursor acceleration.
*
* Sets the mouse cursor acceleration coefficient.
* The acceleration is used to compare the raw relative
* cursor movement against. If greater the raw values are
* multiplied by mouse_speed to fasten the cursor.
*/
void mouse_cursor_set_acceleration(u8 val)
{
mouse_acceleration = val;
}
/**
* Get cursor acceleration.
*
* Returns the current cursor acceleration coefficient.
* Default: 0x10
*/
u8 mouse_cursor_get_acceleration(void)
{
return mouse_acceleration;
}
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