From 441acfa7c602e45e76e7561bf879d46ba0a13f68 Mon Sep 17 00:00:00 2001
From: Kevin Lange <kevin.lange@dakko.us>
Date: Sat, 29 Oct 2011 00:33:45 -0500
Subject: [PATCH] [mouse] Mouse drivers

---
 kernel/core/mouse.c    | 92 ++++++++++++++++++++++++++++++++++++++++++
 kernel/include/types.h |  1 +
 kernel/main.c          |  1 +
 3 files changed, 94 insertions(+)
 create mode 100644 kernel/core/mouse.c

diff --git a/kernel/core/mouse.c b/kernel/core/mouse.c
new file mode 100644
index 00000000..48fc25a0
--- /dev/null
+++ b/kernel/core/mouse.c
@@ -0,0 +1,92 @@
+#include <system.h>
+
+uint8_t mouse_cycle = 0;
+int8_t  mouse_byte[3];
+int8_t  mouse_x = 0;
+int8_t  mouse_y = 0;
+
+int32_t actual_x = 0;
+int32_t actual_y = 0;
+
+void mouse_handler(struct regs *r) {
+	switch (mouse_cycle) {
+		case 0:
+			mouse_byte[0] = inportb(0x60);
+			++mouse_cycle;
+			break;
+		case 1:
+			mouse_byte[1] = inportb(0x60);
+			++mouse_cycle;
+			break;
+		case 2:
+			mouse_byte[2] = inportb(0x60);
+			mouse_x = mouse_byte[1];
+			mouse_y = mouse_byte[2];
+			mouse_cycle = 0;
+			uint32_t previous_x = actual_x;
+			uint32_t previous_y = actual_y;
+			actual_x = actual_x + mouse_x;
+			actual_y = actual_y + mouse_y;
+			if (actual_x < 0) actual_x = 0;
+			if (actual_x > 10230) actual_x = 10230;
+			if (actual_y < 0) actual_y = 0;
+			if (actual_y > 7670) actual_y = 7670;
+			uint32_t color = 0x00FF00;
+			if (mouse_byte[0] & 0x01) color = 0xFF00FF;
+			bochs_draw_line(previous_x / 10, actual_x / 10, 767 - (previous_y / 10), 767 - (actual_y / 10), color);
+#if 0
+			kprintf("[mouse] %d %d %x\n", (uint32_t)actual_x, (uint32_t)actual_y, (uint32_t)mouse_byte[0]);
+#endif
+			break;
+	}
+}
+
+void mouse_wait(uint8_t a_type) {
+	uint32_t timeout = 100000;
+	if (!a_type) {
+		while (--timeout) {
+			if ((inportb(0x64) & 0x01) == 1) {
+				return;
+			}
+		}
+		return;
+	} else {
+		while (--timeout) {
+			if (!((inportb(0x64) & 0x02))) {
+				return;
+			}
+		}
+		return;
+	}
+}
+
+void mouse_write(uint8_t write) {
+	mouse_wait(1);
+	outportb(0x64, 0xD4);
+	mouse_wait(1);
+	outportb(0x60, write);
+}
+
+uint8_t mouse_read() {
+	mouse_wait(0);
+	return inportb(0x60);
+}
+
+void mouse_install() {
+	uint8_t status;
+	mouse_wait(1);
+	outportb(0x64,0xA8);
+	mouse_wait(1);
+	outportb(0x64,0x20);
+	mouse_wait(0);
+	status = inportb(0x60) | 2;
+	mouse_wait(1);
+	outportb(0x64, 0x60);
+	mouse_wait(1);
+	outportb(0x60, status);
+	mouse_write(0xF6);
+	mouse_read();
+	mouse_write(0xF4);
+	mouse_read();
+	irq_install_handler(12, mouse_handler);
+}
diff --git a/kernel/include/types.h b/kernel/include/types.h
index 22497aab..ab26f5de 100644
--- a/kernel/include/types.h
+++ b/kernel/include/types.h
@@ -15,6 +15,7 @@ typedef signed int int32_t;
 typedef unsigned int uint32_t;
 typedef unsigned short uint16_t;
 typedef unsigned char uint8_t;
+typedef signed char int8_t;
 typedef unsigned long long uint64_t;
 
 
diff --git a/kernel/main.c b/kernel/main.c
index 8dd5a059..914d9bc5 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -121,6 +121,7 @@ int main(struct multiboot *mboot, uint32_t mboot_mag, uintptr_t esp)
 	timer_install();	/* PIC driver */
 	keyboard_install();	/* Keyboard interrupt handler */
 	serial_install();	/* Serial console */
+	mouse_install();	/* Mouse driver */
 
 	tasking_install();	/* Multi-tasking */
 	enable_fpu();		/* Enable the floating point unit */