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- /*
- Copyright 2011 Jun Wako <[email protected]>
-
- 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.h"
- #include "ps2_mouse.h"
- #include "usb_mouse.h"
-
- #define PS2_MOUSE_DEBUG
- #ifdef PS2_MOUSE_DEBUG
- # include "print.h"
- # include "debug.h"
- #else
- # define print(s)
- # define phex(h)
- # define phex16(h)
- #endif
-
- // disable when errors occur 255 times.
- #define ERROR_RETURN() do { \
- if (ps2_error) { \
- if (ps2_mouse_error_count < 255) { \
- ps2_mouse_error_count++; \
- } else { \
- ps2_mouse_error_count = 0; \
- ps2_mouse_enable = false; \
- } \
- return ps2_error; \
- } \
- } while (0)
-
-
- /*
- TODO
- ----
- - Stream mode
- - Tracpoint command support: needed
- - Middle button + move = Wheel traslation
- */
- bool ps2_mouse_enable = true;
- uint8_t ps2_mouse_x = 0;
- uint8_t ps2_mouse_y = 0;
- uint8_t ps2_mouse_btn = 0;
- uint8_t ps2_mouse_error_count = 0;
-
- static uint8_t ps2_mouse_btn_prev = 0;
-
-
- uint8_t ps2_mouse_init(void) {
- uint8_t rcv;
-
- if (!ps2_mouse_enable) return 1;
-
- ps2_host_init();
-
- // Reset
- rcv = ps2_host_send(0xFF);
- print("ps2_mouse_init: send 0xFF: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
- phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // BAT takes some time
- _delay_ms(100);
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read BAT: ");
- phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // Device ID
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read DevID: ");
- phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // Enable data reporting
- ps2_host_send(0xF4);
- print("ps2_mouse_init: send 0xF4: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
- phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // Set Remote mode
- ps2_host_send(0xF0);
- print("ps2_mouse_init: send 0xF0: ");
- phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- // ACK
- rcv = ps2_host_recv();
- print("ps2_mouse_init: read ACK: ");
- phex(rcv); phex(ps2_error); print("\n");
- ERROR_RETURN();
-
- return 0;
- }
-
- /*
- Data format:
- bit: 7 6 5 4 3 2 1 0
- -----------------------------------------------------------------------
- 0 btn: Yovflw Xovflw Ysign Xsign 1 Middle Right Left
- 1 x: X movement(0-255)
- 2 y: Y movement(0-255)
- */
- uint8_t ps2_mouse_read(void)
- {
- uint8_t rcv;
-
- if (!ps2_mouse_enable) return 1;
-
- ps2_host_send(0xEB);
- ERROR_RETURN();
-
- rcv=ps2_host_recv();
- ERROR_RETURN();
-
- if(rcv==0xFA) {
- ps2_mouse_btn = ps2_host_recv();
- ERROR_RETURN();
- ps2_mouse_x = ps2_host_recv();
- ERROR_RETURN();
- ps2_mouse_y = ps2_host_recv();
- ERROR_RETURN();
- }
- return 0;
- }
-
- bool ps2_mouse_changed(void)
- {
- return (ps2_mouse_x || ps2_mouse_y || (ps2_mouse_btn & PS2_MOUSE_BTN_MASK) != ps2_mouse_btn_prev);
- }
-
- #define PS2_MOUSE_SCROLL_BUTTON 0x04
- void ps2_mouse_usb_send(void)
- {
- static bool scrolled = false;
-
- if (!ps2_mouse_enable) return;
-
- if (ps2_mouse_changed()) {
- int8_t x, y, v, h;
- x = y = v = h = 0;
-
- // convert scale of X, Y: PS/2(-256/255) -> USB(-127/127)
- if (ps2_mouse_btn & (1<<PS2_MOUSE_X_SIGN))
- x = ps2_mouse_x > 128 ? (int8_t)ps2_mouse_x : -127;
- else
- x = ps2_mouse_x < 128 ? (int8_t)ps2_mouse_x : 127;
-
- if (ps2_mouse_btn & (1<<PS2_MOUSE_Y_SIGN))
- y = ps2_mouse_y > 128 ? (int8_t)ps2_mouse_y : -127;
- else
- y = ps2_mouse_y < 128 ? (int8_t)ps2_mouse_y : 127;
-
- // Y is needed to reverse
- y = -y;
-
- if (ps2_mouse_btn & PS2_MOUSE_SCROLL_BUTTON) {
- // scroll
- if (x > 0 || x < 0) h = (x > 64 ? 64 : (x < -64 ? -64 :x));
- if (y > 0 || y < 0) v = (y > 64 ? 64 : (y < -64 ? -64 :y));
- if (h || v) {
- scrolled = true;
- usb_mouse_send(0,0, -v/16, h/16, 0);
- _delay_ms(100);
- }
- } else if (!scrolled && (ps2_mouse_btn_prev & PS2_MOUSE_SCROLL_BUTTON)) {
- usb_mouse_send(0,0,0,0, PS2_MOUSE_SCROLL_BUTTON);
- _delay_ms(100);
- usb_mouse_send(0,0,0,0, 0);
- } else {
- scrolled = false;
- usb_mouse_send(x, y, 0, 0, ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
- }
-
- ps2_mouse_btn_prev = (ps2_mouse_btn & PS2_MOUSE_BTN_MASK);
- ps2_mouse_print();
- }
- ps2_mouse_x = 0;
- ps2_mouse_y = 0;
- ps2_mouse_btn = 0;
- }
-
- void ps2_mouse_print(void)
- {
- if (!debug_mouse) return;
- print("ps2_mouse[btn|x y]: ");
- phex(ps2_mouse_btn); print("|");
- phex(ps2_mouse_x); print(" ");
- phex(ps2_mouse_y); print("\n");
- }
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