2 Copyright 2011,2013 Jun Wako <wakojun@gmail.com>
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>.
20 #include<util/delay.h>
21 #include "ps2_mouse.h"
29 /* ============================= MACROS ============================ */
31 static report_mouse_t mouse_report = {};
33 static inline void ps2_mouse_print_report(report_mouse_t *mouse_report);
34 static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report);
35 static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report);
36 static inline void ps2_mouse_enable_scrolling(void);
37 static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report);
39 /* ============================= IMPLEMENTATION ============================ */
41 /* supports only 3 button mouse at this time */
42 void ps2_mouse_init(void) {
45 _delay_ms(PS2_MOUSE_INIT_DELAY); // wait for powering up
47 PS2_MOUSE_SEND(PS2_MOUSE_RESET, "ps2_mouse_init: sending reset");
49 PS2_MOUSE_RECEIVE("ps2_mouse_init: read BAT");
50 PS2_MOUSE_RECEIVE("ps2_mouse_init: read DevID");
52 #ifdef PS2_MOUSE_USE_REMOTE_MODE
53 ps2_mouse_set_remote_mode();
55 ps2_mouse_enable_data_reporting();
58 #ifdef PS2_MOUSE_ENABLE_SCROLLING
59 ps2_mouse_enable_scrolling();
62 #ifdef PS2_MOUSE_USE_2_1_SCALING
63 ps2_mouse_set_scaling_2_1();
66 ps2_mouse_init_user();
70 void ps2_mouse_init_user(void) {
73 void ps2_mouse_task(void) {
74 static uint8_t buttons_prev = 0;
75 extern int tp_buttons;
77 /* receives packet from mouse */
79 rcv = ps2_host_send(PS2_MOUSE_READ_DATA);
81 mouse_report.buttons = ps2_host_recv_response() | tp_buttons;
82 mouse_report.x = ps2_host_recv_response() * PS2_MOUSE_X_MULTIPLIER;
83 mouse_report.y = ps2_host_recv_response() * PS2_MOUSE_Y_MULTIPLIER;
84 #ifdef PS2_MOUSE_ENABLE_SCROLLING
85 mouse_report.v = -(ps2_host_recv_response() & PS2_MOUSE_SCROLL_MASK) * PS2_MOUSE_V_MULTIPLIER;
88 if (debug_mouse) print("ps2_mouse: fail to get mouse packet\n");
92 /* if mouse moves or buttons state changes */
93 if (mouse_report.x || mouse_report.y || mouse_report.v ||
94 ((mouse_report.buttons ^ buttons_prev) & PS2_MOUSE_BTN_MASK)) {
95 #ifdef PS2_MOUSE_DEBUG_RAW
96 // Used to debug raw ps2 bytes from mouse
97 ps2_mouse_print_report(&mouse_report);
99 buttons_prev = mouse_report.buttons;
100 ps2_mouse_convert_report_to_hid(&mouse_report);
101 #if PS2_MOUSE_SCROLL_BTN_MASK
102 ps2_mouse_scroll_button_task(&mouse_report);
104 #ifdef PS2_MOUSE_DEBUG_HID
105 // Used to debug the bytes sent to the host
106 ps2_mouse_print_report(&mouse_report);
108 host_mouse_send(&mouse_report);
111 ps2_mouse_clear_report(&mouse_report);
114 void ps2_mouse_disable_data_reporting(void) {
115 PS2_MOUSE_SEND(PS2_MOUSE_DISABLE_DATA_REPORTING, "ps2 mouse disable data reporting");
118 void ps2_mouse_enable_data_reporting(void) {
119 PS2_MOUSE_SEND(PS2_MOUSE_ENABLE_DATA_REPORTING, "ps2 mouse enable data reporting");
122 void ps2_mouse_set_remote_mode(void) {
123 PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_REMOTE_MODE, "ps2 mouse set remote mode");
124 ps2_mouse_mode = PS2_MOUSE_REMOTE_MODE;
127 void ps2_mouse_set_stream_mode(void) {
128 PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_STREAM_MODE, "ps2 mouse set stream mode");
129 ps2_mouse_mode = PS2_MOUSE_STREAM_MODE;
132 void ps2_mouse_set_scaling_2_1(void) {
133 PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_2_1, "ps2 mouse set scaling 2:1");
136 void ps2_mouse_set_scaling_1_1(void) {
137 PS2_MOUSE_SEND_SAFE(PS2_MOUSE_SET_SCALING_1_1, "ps2 mouse set scaling 1:1");
140 void ps2_mouse_set_resolution(ps2_mouse_resolution_t resolution) {
141 PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_RESOLUTION, resolution, "ps2 mouse set resolution");
144 void ps2_mouse_set_sample_rate(ps2_mouse_sample_rate_t sample_rate) {
145 PS2_MOUSE_SET_SAFE(PS2_MOUSE_SET_SAMPLE_RATE, sample_rate, "ps2 mouse set sample rate");
148 /* ============================= HELPERS ============================ */
150 #define X_IS_NEG (mouse_report->buttons & (1<<PS2_MOUSE_X_SIGN))
151 #define Y_IS_NEG (mouse_report->buttons & (1<<PS2_MOUSE_Y_SIGN))
152 #define X_IS_OVF (mouse_report->buttons & (1<<PS2_MOUSE_X_OVFLW))
153 #define Y_IS_OVF (mouse_report->buttons & (1<<PS2_MOUSE_Y_OVFLW))
154 static inline void ps2_mouse_convert_report_to_hid(report_mouse_t *mouse_report) {
155 // PS/2 mouse data is '9-bit integer'(-256 to 255) which is comprised of sign-bit and 8-bit value.
159 // Meanwhile USB HID mouse indicates 8bit data(-127 to 127), note that -128 is not used.
161 // This converts PS/2 data into HID value. Use only -127-127 out of PS/2 9-bit.
162 mouse_report->x = X_IS_NEG ?
163 ((!X_IS_OVF && -127 <= mouse_report->x && mouse_report->x <= -1) ? mouse_report->x : -127) :
164 ((!X_IS_OVF && 0 <= mouse_report->x && mouse_report->x <= 127) ? mouse_report->x : 127);
165 mouse_report->y = Y_IS_NEG ?
166 ((!Y_IS_OVF && -127 <= mouse_report->y && mouse_report->y <= -1) ? mouse_report->y : -127) :
167 ((!Y_IS_OVF && 0 <= mouse_report->y && mouse_report->y <= 127) ? mouse_report->y : 127);
169 // remove sign and overflow flags
170 mouse_report->buttons &= PS2_MOUSE_BTN_MASK;
172 // invert coordinate of y to conform to USB HID mouse
173 mouse_report->y = -mouse_report->y;
176 static inline void ps2_mouse_clear_report(report_mouse_t *mouse_report) {
181 mouse_report->buttons = 0;
184 static inline void ps2_mouse_print_report(report_mouse_t *mouse_report) {
185 if (!debug_mouse) return;
186 print("ps2_mouse: [");
187 phex(mouse_report->buttons); print("|");
188 print_hex8((uint8_t)mouse_report->x); print(" ");
189 print_hex8((uint8_t)mouse_report->y); print(" ");
190 print_hex8((uint8_t)mouse_report->v); print(" ");
191 print_hex8((uint8_t)mouse_report->h); print("]\n");
194 static inline void ps2_mouse_enable_scrolling(void) {
195 PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Initiaing scroll wheel enable: Set sample rate");
196 PS2_MOUSE_SEND(200, "200");
197 PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
198 PS2_MOUSE_SEND(100, "100");
199 PS2_MOUSE_SEND(PS2_MOUSE_SET_SAMPLE_RATE, "Set sample rate");
200 PS2_MOUSE_SEND(80, "80");
201 PS2_MOUSE_SEND(PS2_MOUSE_GET_DEVICE_ID, "Finished enabling scroll wheel");
205 #define PRESS_SCROLL_BUTTONS mouse_report->buttons |= (PS2_MOUSE_SCROLL_BTN_MASK)
206 #define RELEASE_SCROLL_BUTTONS mouse_report->buttons &= ~(PS2_MOUSE_SCROLL_BTN_MASK)
207 static inline void ps2_mouse_scroll_button_task(report_mouse_t *mouse_report) {
212 } scroll_state = SCROLL_NONE;
213 static uint16_t scroll_button_time = 0;
215 if (PS2_MOUSE_SCROLL_BTN_MASK == (mouse_report->buttons & (PS2_MOUSE_SCROLL_BTN_MASK))) {
216 // All scroll buttons are pressed
218 if (scroll_state == SCROLL_NONE) {
219 scroll_button_time = timer_read();
220 scroll_state = SCROLL_BTN;
223 // If the mouse has moved, update the report to scroll instead of move the mouse
224 if (mouse_report->x || mouse_report->y) {
225 scroll_state = SCROLL_SENT;
226 mouse_report->v = -mouse_report->y/(PS2_MOUSE_SCROLL_DIVISOR_V);
227 mouse_report->h = mouse_report->x/(PS2_MOUSE_SCROLL_DIVISOR_H);
231 } else if (0 == (PS2_MOUSE_SCROLL_BTN_MASK & mouse_report->buttons)) {
232 // None of the scroll buttons are pressed
234 #if PS2_MOUSE_SCROLL_BTN_SEND
235 if (scroll_state == SCROLL_BTN
236 && timer_elapsed(scroll_button_time) < PS2_MOUSE_SCROLL_BTN_SEND) {
237 PRESS_SCROLL_BUTTONS;
238 host_mouse_send(mouse_report);
240 RELEASE_SCROLL_BUTTONS;
243 scroll_state = SCROLL_NONE;
246 RELEASE_SCROLL_BUTTONS;