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/*
Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <avr/io.h>
#include <util/delay.h>
#include "ps2_mouse.h"
#include "host.h"
#include "timer.h"
#include "print.h"
#include "report.h"
#include "debug.h"
#include "ps2.h"
/* ============================= MACROS ============================ */
static report_mouse_t mouse_report = {};
static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report);
static inline void ps2_mouse_enable_scrolling(void);
static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
/* ============================= IMPLEMENTATION ============================ */
/* supports only 3 button mouse at this time */
void ps2_mouse_init(void) {
ps2_host_init();
_delay_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT");
PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID");
#ifdef PS2_MOUSE_USE_REMOTE_MODE
ps2_mouse_set_remote_mode();
#else
ps2_mouse_enable_data_reporting();
#endif
#ifdef PS2_MOUSE_ENABLE_SCROLLING
ps2_mouse_enable_scrolling();
#endif
#ifdef PS2_MOUSE_USE_2_1_SCALING
ps2_mouse_set_scaling_2_1();
#endif
ps2_mouse_init_user();
}
__attribute__((weak)) void ps2_mouse_init_user(void) {}
void ps2_mouse_task(void) {
static uint8_t buttons_prev = 0;
extern int tp_buttons;
/* receives packet from mouse */
uint8_t rcv;
rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
if (rcv == PS2_ACK) {
mouse_report.buttons = ps2_host_recv_response() | tp_buttons;
mouse_report.x = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER;
mouse_report.y = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER;
#ifdef PS2_MOUSE_ENABLE_SCROLLING
mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER;
#endif
} else {
if (debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
return;
}
/* if mouse moves or buttons state changes */
if (mouse_report.x || mouse_report.y || mouse_report.v || ((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
#ifdef PS2_MOUSE_DEBUG_RAW
// Used to debug raw ps2 bytes from mouse
ps2_mouse_print_report(&mouse_report);
#endif
buttons_prev = mouse_report.buttons;
ps2_mouse_convert_report_to_hid(&mouse_report);
#if PS2_MOUSE_SCROLL_BTN_MASK
ps2_mouse_scroll_button_task(&mouse_report);
#endif
#ifdef PS2_MOUSE_DEBUG_HID
// Used to debug the bytes sent to the host
ps2_mouse_print_report(&mouse_report);
#endif
host_mouse_send(&mouse_report);
}
ps2_mouse_clear_report(&mouse_report);
}
void ps2_mouse_disable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting"); }
void ps2_mouse_enable_data_reporting(void) { PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting"); }
void ps2_mouse_set_remote_mode(void) {
PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode");
ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE;
}
void ps2_mouse_set_stream_mode(void) {
PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode");
ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
}
void ps2_mouse_set_scaling_2_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1"); }
void ps2_mouse_set_scaling_1_1(void) { PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1"); }
void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution"); }
void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) { PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate"); }
/* ============================= HELPERS ============================ */
#define X_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_X_SIGN))
#define Y_IS_NEG (mouse_report->buttons & (1 << PS2_MOUSE_Y_SIGN))
#define X_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_X_OVFLW))
#define Y_IS_OVF (mouse_report->buttons & (1 << PS2_MOUSE_Y_OVFLW))
static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) {
// PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
// bit: 8 7 ... 0
// sign \8-bit/
//
// Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
//
// This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
mouse_report->x = X_IS_NEG ? ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) : ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
mouse_report->y = Y_IS_NEG ? ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) : ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
// remove sign and overflow flags
mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
#ifdef PS2_MOUSE_INVERT_X
mouse_report->x = -mouse_report->x;
#endif
#ifndef PS2_MOUSE_INVERT_Y // NOTE if not!
// invert coordinate of y to conform to USB HID mouse
mouse_report->y = -mouse_report->y;
#endif
}
static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {
mouse_report->x = 0;
mouse_report->y = 0;
mouse_report->v = 0;
mouse_report->h = 0;
mouse_report->buttons = 0;
}
static inline void ps2_mouse_print_report(report_mouse_t *mouse_report) {
if (!debug_mouse) return;
print("ps2_mouse: [");
phex(mouse_report->buttons);
print("|");
print_hex8((uint8_t)mouse_report->x);
print(" ");
print_hex8((uint8_t)mouse_report->y);
print(" ");
print_hex8((uint8_t)mouse_report->v);
print(" ");
print_hex8((uint8_t)mouse_report->h);
print("]\n");
}
static inline void ps2_mouse_enable_scrolling(void) {
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Initiaing scroll wheel enable: Set sample rate");
PS2_MOUSE_SEND(200, "200");
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
PS2_MOUSE_SEND(100, "100");
PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
PS2_MOUSE_SEND(80, "80");
PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel");
_delay_ms(20);
}
#define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK)
#define RELEASE_SCROLL_BUTTONS mouse_report->buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK)
static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
static enum {
SCROLL_NONE,
SCROLL_BTN,
SCROLL_SENT,
} scroll_state = SCROLL_NONE;
static uint16_t scroll_button_time = 0;
if (PS2_MOUSE_SCROLL_BTN_MASK == (mouse_report->buttons & (PS2_MOUSE_SCROLL_BTN_MASK))) {
// All scroll buttons are pressed
if (scroll_state == SCROLL_NONE) {
scroll_button_time = timer_read();
scroll_state = SCROLL_BTN;
}
// If the mouse has moved, update the report to scroll instead of move the mouse
if (mouse_report->x || mouse_report->y) {
scroll_state = SCROLL_SENT;
mouse_report->v = -mouse_report->y / (PS2_MOUSE_SCROLL_DIVISOR_V);
mouse_report->h = mouse_report->x / (PS2_MOUSE_SCROLL_DIVISOR_H);
mouse_report->x = 0;
mouse_report->y = 0;
#ifdef PS2_MOUSE_INVERT_H
mouse_report->h = -mouse_report->h;
#endif
#ifdef PS2_MOUSE_INVERT_V
mouse_report->v = -mouse_report->v;
#endif
}
} else if (0 == (PS2_MOUSE_SCROLL_BTN_MASK & mouse_report->buttons)) {
// None of the scroll buttons are pressed
#if PS2_MOUSE_SCROLL_BTN_SEND
if (scroll_state == SCROLL_BTN && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
PRESS_SCROLL_BUTTONS;
host_mouse_send(mouse_report);
_delay_ms(100);
RELEASE_SCROLL_BUTTONS;
}
#endif
scroll_state = SCROLL_NONE;
}
RELEASE_SCROLL_BUTTONS;
}
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