diff options
Diffstat (limited to 'drivers/ps2/ps2_mouse.c')
| -rw-r--r-- | drivers/ps2/ps2_mouse.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/drivers/ps2/ps2_mouse.c b/drivers/ps2/ps2_mouse.c new file mode 100644 index 0000000000..8a6668b410 --- /dev/null +++ b/drivers/ps2/ps2_mouse.c @@ -0,0 +1,270 @@ +/* +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 "ps2_mouse.h" +#include "wait.h" +#include "gpio.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(); + + wait_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) {} + +__attribute__((weak)) void ps2_mouse_moved_user(report_mouse_t *mouse_report) {} + +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 + if (mouse_report.x || mouse_report.y || mouse_report.v) { + ps2_mouse_moved_user(&mouse_report); + } +#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); + +#ifdef PS2_MOUSE_INVERT_BUTTONS + // swap left & right buttons + uint8_t needs_left = mouse_report->buttons & PS2_MOUSE_BTN_RIGHT; + uint8_t needs_right = mouse_report->buttons & PS2_MOUSE_BTN_LEFT; + mouse_report->buttons = (mouse_report->buttons & ~(PS2_MOUSE_BTN_MASK)) | (needs_left ? PS2_MOUSE_BTN_LEFT : 0) | (needs_right ? PS2_MOUSE_BTN_RIGHT : 0); +#else + // remove sign and overflow flags + mouse_report->buttons &= PS2_MOUSE_BTN_MASK; +#endif + +#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 + +#ifdef PS2_MOUSE_ROTATE + int8_t x = mouse_report->x; + int8_t y = mouse_report->y; +# if PS2_MOUSE_ROTATE == 90 + mouse_report->x = y; + mouse_report->y = -x; +# elif PS2_MOUSE_ROTATE == 180 + mouse_report->x = -x; + mouse_report->y = -y; +# elif PS2_MOUSE_ROTATE == 270 + mouse_report->x = -y; + mouse_report->y = x; +# endif +#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: ["); + print_hex8(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"); + wait_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); + wait_ms(100); + RELEASE_SCROLL_BUTTONS; + } +#endif + scroll_state = SCROLL_NONE; + } + + RELEASE_SCROLL_BUTTONS; +} |