From b980ab94c2a793918283fa888b2ca07e5a79caaa Mon Sep 17 00:00:00 2001
From: Matheus <matheusuky@gmail.com>
Date: Thu, 5 Jan 2023 23:29:03 -0300
Subject: [PATCH] generic mouse interface

---
 src/arch/x86_64/main.c      |  2 +
 src/include/kernel/devman.h |  1 +
 src/include/kernel/mouse.h  | 28 +++++++++++++
 src/sys/mouse.c             | 84 +++++++++++++++++++++++++++++++++++++
 src/video/consoledev.c      |  2 +-
 5 files changed, 116 insertions(+), 1 deletion(-)
 create mode 100644 src/include/kernel/mouse.h
 create mode 100644 src/sys/mouse.c

diff --git a/src/arch/x86_64/main.c b/src/arch/x86_64/main.c
index 589a13c7..e571c7f7 100644
--- a/src/arch/x86_64/main.c
+++ b/src/arch/x86_64/main.c
@@ -90,6 +90,8 @@ void kmain(){
 	smp_init();
 
 	keyboard_init();
+	
+	mouse_init();
 
 	ps2_init();
 	
diff --git a/src/include/kernel/devman.h b/src/include/kernel/devman.h
index 00ced8f6..96a7704e 100644
--- a/src/include/kernel/devman.h
+++ b/src/include/kernel/devman.h
@@ -11,6 +11,7 @@
 #define MAJOR_FB 5
 #define MAJOR_KB 6
 #define MAJOR_E9OUT 7
+#define MAJOR_MOUSE 8
 
 typedef struct{
 	int (*read)(int* error, int minor, void* buff, size_t count, size_t offset);
diff --git a/src/include/kernel/mouse.h b/src/include/kernel/mouse.h
new file mode 100644
index 00000000..4cff1067
--- /dev/null
+++ b/src/include/kernel/mouse.h
@@ -0,0 +1,28 @@
+#ifndef _MOUSE_H_INCLUDE
+#define _MOUSE_H_INCLUDE
+
+#define MOUSE_FLAG_RB 1
+#define MOUSE_FLAG_MB 2
+#define MOUSE_FLAG_LB 4
+#define MOUSE_FLAG_B4 8
+#define MOUSE_FLAG_B5 16
+
+#include <ringbuffer.h>
+#include <kernel/event.h>
+
+typedef struct {
+	int flags;
+	int x,y,z;
+} mousepacket_t;
+
+typedef struct {
+	ringbuffer_t buffer;
+	event_t event;
+	int flags;
+} mouse_t;
+
+void mouse_init();
+int mouse_getnew();
+void mouse_packet(int, mousepacket_t);
+
+#endif
diff --git a/src/sys/mouse.c b/src/sys/mouse.c
new file mode 100644
index 00000000..3dea6343
--- /dev/null
+++ b/src/sys/mouse.c
@@ -0,0 +1,84 @@
+#include <kernel/mouse.h>
+#include <kernel/devman.h>
+#include <arch/panic.h>
+#include <poll.h>
+#include <arch/interrupt.h>
+
+#define MOUSE_COUNT 32
+
+static int mouseinuse;
+
+mouse_t mouse[MOUSE_COUNT];
+ringbuffer_t devbuffer;
+
+void mouse_packet(int id, mousepacket_t packet){
+	ringbuffer_write(&devbuffer, &packet, sizeof(mousepacket_t));
+	ringbuffer_write(&mouse[id].buffer, &packet, sizeof(mousepacket_t));
+	event_signal(&mouse[id].event, false);
+}
+
+int mouse_getnew(){
+	
+	int id;
+
+	for(id = 0; id < 32; ++id)
+		if(((mouseinuse >> id) & 1) == 0)
+			break;
+
+	if(id == 32)
+		return -1;
+
+	mouseinuse |= 1 << id;
+	
+	return id;
+	
+}
+
+static int read(int *error, int minor, void* buff, size_t count, size_t offset){
+        count /= sizeof(mousepacket_t);
+        if(count == 0){
+                *error = EINVAL;
+                return -1;
+        }
+
+        arch_interrupt_disable();
+
+        count = ringbuffer_read(&devbuffer, buff, count*sizeof(mousepacket_t));
+
+        arch_interrupt_enable();
+
+        *error = 0;
+        return count;
+
+}
+
+static int poll(int minor, pollfd* fd){
+
+        if((fd->events & POLLIN) && devbuffer.read != devbuffer.write)
+                fd->revents |= POLLIN;
+
+
+        return 0;
+}
+
+
+static devcalls calls = {
+	.read = read,
+	.poll = poll
+};
+
+void mouse_init(){
+	
+	for(uintmax_t i = 0; i < MOUSE_COUNT; ++i){
+		if(ringbuffer_init(&mouse[i].buffer, sizeof(mousepacket_t)*100))
+			_panic("Out of memory!", NULL);
+	}
+
+	if(ringbuffer_init(&devbuffer, sizeof(mousepacket_t)*100))
+		_panic("Out of memory", NULL);
+	
+	if(devman_newdevice("mouse", TYPE_CHARDEV, MAJOR_MOUSE, 0, &calls))
+		_panic("Failed to create mouse device", NULL);
+
+
+}
diff --git a/src/video/consoledev.c b/src/video/consoledev.c
index b1d36e05..3bf60aca 100644
--- a/src/video/consoledev.c
+++ b/src/video/consoledev.c
@@ -278,7 +278,7 @@ static int poll(int minor, pollfd* fd){
 	
 }
 
-devcalls calls = {
+static devcalls calls = {
 	read, write, isatty, isseekable, ioctl, poll
 };