working on mouse driver

1 files changed, 127 insertions, 1 deletions

diff --git a/kernel/mouse.c b/kernel/mouse.c
index b6fd14d..de1e3bf 100644
--- a/kernel/mouse.c
+++ b/kernel/mouse.c
@@ -1,9 +1,135 @@
+//http://forum.osdev.org/viewtopic.php?t=10247
+//based on Mouse.inc by SANiK
+//License: Use as you wish, except to cause damage
+
 #define FOOLOS_MODULE_NAME "mouse"
 
 #include "lib/logger/log.h"
+#include "lib/int/stdint.h"
+
+#include "x86.h"
+
+
+static volatile uint8_t mouse_cycle;
+static volatile int8_t mouse_byte[3];
+static volatile int8_t mouse_x;
+static volatile int8_t mouse_y;
+
+
+uint8_t mouse_read();
+
+int8_t mouse_get_x()
+{
+    return mouse_x;
+}
+int8_t mouse_get_y()
+{
+    return mouse_y;
+}
 
 void mouse_init()
 {
-    log(FOOLOS_MODULE_NAME,FOOLOS_LOG_FINE,"Initializing mouse driver");
+    mouse_cycle=mouse_x=mouse_y=0;
+
+  uint8_t _status;  //unsigned char
+
+  //Enable the auxiliary mouse device
+  mouse_wait(1);
+  x86_outb(0x64, 0xA8);
+  
+  //Enable the interrupts
+  mouse_wait(1);
+  x86_outb(0x64, 0x20);
+  mouse_wait(0);
+  _status=(x86_inb(0x60) | 2);
+  mouse_wait(1);
+  x86_outb(0x64, 0x60);
+  mouse_wait(1);
+  x86_outb(0x60, _status);
+  
+  //Tell the mouse to use default settings
+  mouse_write(0xF6);
+  mouse_read();  //Acknowledge
+  
+  //Enable the mouse
+  mouse_write(0xF4);
+  mouse_read();  //Acknowledge
+
+  log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"Mouse Initialized");
+
+}
+
+//Mouse functions
+void mouse_handler()//struct regs *a_r) //struct regs *a_r (not used but just there)
+{
+    X86_IRQ_BEGIN
+
+  switch(mouse_cycle)
+  {
+    case 0:
+      mouse_byte[0]=x86_inb(0x60);
+      mouse_cycle++;
+      break;
+    case 1:
+      mouse_byte[1]=x86_inb(0x60);
+      mouse_cycle++;
+      break;
+    case 2:
+      mouse_byte[2]=x86_inb(0x60);
+      mouse_x=mouse_byte[1];
+      mouse_y=mouse_byte[2];
+      mouse_cycle=0;
+      break;
+
+  }
+
+  //log(FOOLOS_MODULE_NAME,FOOLOS_LOG_INFO,"irq12");
+
+  X86_IRQ_END
+}
 
+uint8_t mouse_read()
+{
+  //Get's response from mouse
+  mouse_wait(0); 
+  return x86_inb(0x60);
+}
+
+inline void mouse_write(uint8_t  a_write) 
+{
+  //Wait to be able to send a command
+  mouse_wait(1);
+  //Tell the mouse we are sending a command
+  x86_outb(0x64, 0xD4);
+  //Wait for the final part
+  mouse_wait(1);
+  //Finally write
+  x86_outb(0x60, a_write);
+}
+
+inline void mouse_wait(uint8_t a_type) //unsigned char
+{
+  uint32_t _time_out=100000; //unsigned int
+  if(a_type==0)
+  {
+    while(_time_out--) //Data
+    {
+      if((x86_inb(0x64) & 1)==1)
+      {
+        return;
+      }
+    }
+    return;
+  }
+  else
+  {
+    while(_time_out--) //Signal
+    {
+      if((x86_inb(0x64) & 2)==0)
+      {
+        return;
+      }
+    }
+    return;
+  }
 }