diff options
Diffstat (limited to 'protocol/ps2_mouse.c')
| -rw-r--r-- | protocol/ps2_mouse.c | 218 |
1 files changed, 218 insertions, 0 deletions
diff --git a/protocol/ps2_mouse.c b/protocol/ps2_mouse.c new file mode 100644 index 0000000000..f796b2b4de --- /dev/null +++ b/protocol/ps2_mouse.c @@ -0,0 +1,218 @@ +/* +Copyright 2011 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.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"); +} |