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 000000000..8a6668b41
--- /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;
+}