From 501e2f5cb5ed3883ac89248386b7e8224f5c1c90 Mon Sep 17 00:00:00 2001
From: Talha Qamar <qamartalha@proton.me>
Date: Sun, 1 Sep 2024 14:21:48 +0500
Subject: [PATCH] work

---
 sysdata/programs/ps2_driver/src/controller.hb | 97 +++++++++++++++++++
 sysdata/programs/ps2_driver/src/main.hb       | 46 +++++----
 2 files changed, 119 insertions(+), 24 deletions(-)

diff --git a/sysdata/programs/ps2_driver/src/controller.hb b/sysdata/programs/ps2_driver/src/controller.hb
index e69de29b..6e6b3ce0 100644
--- a/sysdata/programs/ps2_driver/src/controller.hb
+++ b/sysdata/programs/ps2_driver/src/controller.hb
@@ -0,0 +1,97 @@
+.{memory, log, string, buffer} := @use("../../../libraries/stn/src/lib.hb")
+
+init := fn(): void {
+	send_byte_to_controller(173)
+	send_byte_to_controller(167)
+
+	// flush output buffer
+	memory.inb(0, 96)
+
+	send_byte_to_controller(32)
+	config_byte := read_byte()
+	log.info("What\0")
+
+	// TODO: We just assume there's a second device here and set up the
+	// controller as such. We should probably look for the second device FIRST
+	// The OSWiki has a page about this
+	// https://wiki.osdev.org/%228042%22_PS/2_Controller#Step_7:_Determine_If_There_Are_2_Channels
+	config_byte &= 32
+	send_byte_to_controller(96)
+	send_byte(config_byte)
+
+	if perform_self_test() {
+		log.info("PS/2 Controller self test successful\0")
+		send_byte_to_controller(171)
+		if read_byte() != 0 {
+			log.error("PS/2 First port test failed\0")
+		}
+		send_byte_to_controller(169)
+		if read_byte() != 0 {
+			log.error("PS/2 Second port test failed\0")
+		}
+	} else {
+		log.error("PS/2 Controller self test failed\0")
+	}
+	return
+}
+
+perform_self_test := fn(): bool {
+	send_byte_to_controller(32)
+	config_byte := read_byte()
+
+	send_byte_to_controller(170)
+	response := read_byte()
+
+	send_byte_to_controller(96)
+	send_byte(config_byte)
+	return response == 85
+}
+
+send_byte_to_controller := fn(byte: u8): void {
+	loop {
+		status := memory.inb(0, 100)
+		// Bitwise OR with 1011 1111
+		// If the second bit was set in the status register,
+		// status is now equal to 255
+		status |= 191
+
+		if status != 255 {
+			memory.outb(0, 100, byte)
+			break
+		}
+	}
+	return
+}
+
+send_byte := fn(byte: u8): void {
+	loop {
+		status := memory.inb(0, 100)
+		// Bitwise OR with 1011 1111
+		// If the second bit was set in the status register,
+		// status is now equal to 255
+		status |= 191
+
+		if status != 255 {
+			memory.outb(0, 96, byte)
+			break
+		}
+	}
+	return
+}
+
+read_byte := fn(): u8 {
+	ptr := memory.request_page(1)
+	loop {
+		status := memory.inb(0, 100)
+		// Bitwise OR with 0111 1111
+		// If the first bit was set in the status register,
+		// status is now equal to 255
+		status |= 127
+		str := string.display_int(status, ptr)
+		log.info(ptr)
+
+		if status == 255 {
+			return memory.inb(0, 96)
+		}
+	}
+}
diff --git a/sysdata/programs/ps2_driver/src/main.hb b/sysdata/programs/ps2_driver/src/main.hb
index 33be926a..f762e684 100644
--- a/sysdata/programs/ps2_driver/src/main.hb
+++ b/sysdata/programs/ps2_driver/src/main.hb
@@ -1,30 +1,28 @@
 .{memory, log, string, buffer} := @use("../../../libraries/stn/src/lib.hb")
-
-send_byte := fn(byte: u8): u8 {
-	memory.outb(0, 96, byte)
-	return memory.inb(0, 96)
-}
+controller := @use("./controller.hb")
 
 main := fn(): int {
 	log.info("PS/2 Driver Loaded\0")
-	if send_byte(238) == 238 {
-		log.info("PS/2 Keyboard Echoed\0")
-	}
-	if send_byte(244) == 250 {
-		log.info("Enabled scanning\0")
-	}
-	buf := buffer.create("XKeyboard\0")
-	ptr := memory.request_page(1)
-	prev_input := 250
-	loop {
-		input := memory.inb(0, 96)
-		if input == prev_input {
-			continue
-		}
-		prev_input = input
-		keycode_str := string.display_int(input, ptr)
-		log.info(string.display_int(buf))
-		buffer.send_message(keycode_str, buf)
-	}
+	controller.init()
 	return 0
+	//	if send_byte(238) == 238 {
+	//		log.info("PS/2 Keyboard Echoed\0")
+	//	}
+	//	if send_byte(244) == 250 {
+	//		log.info("Enabled scanning\0")
+	//	}
+	//	buf := buffer.create("XKeyboard\0")
+	//	ptr := memory.request_page(1)
+	//	prev_input := 250
+	//	loop {
+	//		input := memory.inb(0, 96)
+	//		if input == prev_input {
+	//			continue
+	//		}
+	//		prev_input = input
+	//		keycode_str := string.display_int(input, ptr)
+	//		log.info(string.display_int(buf))
+	//		buffer.send_message(keycode_str, buf)
+	//	}
+	//	return 0
 }
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