From 71167b959595616e6573eb6af56335bb145eaa8e Mon Sep 17 00:00:00 2001
From: Marvin Borner
Date: Sun, 15 Sep 2019 00:05:23 +0200
Subject: Began mouse input support

---
 src/input/ps2/mouse.c | 105 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 src/input/ps2/mouse.c

(limited to 'src')

diff --git a/src/input/ps2/mouse.c b/src/input/ps2/mouse.c
new file mode 100644
index 0000000..5113c70
--- /dev/null
+++ b/src/input/ps2/mouse.c
@@ -0,0 +1,105 @@
+#include "../../io/io.h"
+
+char mouse_cycle = 0;
+signed char mouse_byte[3], mouse_ex[3];
+signed char mouse_x = 0;
+signed char mouse_y = 0;
+int mouse_but_1 = 0;
+int mouse_but_2 = 0;
+int mm_n[3] = {0, 0, 0,};
+
+void mouse_handler(struct iregs *a_r) {
+    switch (mouse_cycle) {
+        case 0:
+            mouse_byte[0] = receive(0x60);
+            mouse_cycle++;
+            break;
+        case 1:
+            mouse_byte[1] = receive(0x60);
+            mouse_cycle++;
+            break;
+        case 2:
+            mouse_byte[2] = receive(0x60);
+            mouse_x = mouse_byte[1];
+            mouse_y = mouse_byte[2];
+            mouse_but_1 = (mouse_byte[0] % 2);
+            mouse_but_2 = ((mouse_byte[0] % 4) - (mouse_byte[0] % 2)) / 2;
+            mouse_cycle = 0;
+            mouse_ex[0] = mouse_byte[0];
+            mm_n[0] = 1;
+            mouse_ex[1] = mouse_byte[1];
+            mm_n[1] = 1;
+            mouse_ex[2] = mouse_byte[2];
+            mm_n[2] = 1;
+            break;
+    }
+}
+
+inline void mouse_wait(char a_type) {
+    unsigned int _time_out = 100000;
+    if (a_type == 0) {
+        while (_time_out--) {
+            if ((receive(0x64) & 1) == 1) {
+                return;
+            }
+        }
+        return;
+    } else {
+        while (_time_out--) {
+            if ((receive(0x64) & 2) == 0) {
+                return;
+            }
+        }
+        return;
+    }
+}
+
+inline void mouse_write(char a_write) {
+    mouse_wait(1);
+    send(0x64, 0xD4);
+    mouse_wait(1);
+    send(0x60, a_write);
+}
+
+char mouse_read() {
+    mouse_wait(0);
+    return receive(0x60);
+}
+
+void mouse_install() {
+    char _status;
+
+    // Enable auxiliary mouse device
+    mouse_wait(1);
+    send(0x64, 0xA8);
+
+    // Enable interrupts
+    mouse_wait(1);
+    send(0x64, 0x20);
+    mouse_wait(0);
+    _status = (receive(0x60) | 2);
+    mouse_wait(1);
+    send(0x64, 0x60);
+    mouse_wait(1);
+    send(0x60, _status);
+
+    // Use default settings
+    mouse_write(0xF6);
+    mouse_read();
+
+    // Enable mouse
+    mouse_write(0xF4);
+    mouse_read();
+
+    // Setup the mouse handler
+    // irq_install_handler(12, mouse_handler);
+}
+
+
+char get_mouse(int n) {
+    if (mm_n[n] == 1) {
+        mm_n[n] = 0;
+        return mouse_ex[n];
+    } else
+        return 0;
+}
\ No newline at end of file
-- 
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