Don't necessarily wait for data.

[netwatch.git] / aseg / counter.c

diff --git a/aseg/counter.c b/aseg/counter.c
index 73003da26c6890024b2e32d28266a194d51ec693..ab200c107c8c73e441c7ba9211a72688a80e70b4 100644 (file)
--- a/aseg/counter.c
+++ b/aseg/counter.c
@@ -10,39 +10,71 @@
 #include "keyboard.h"
 
 unsigned int counter = 0;
+unsigned int lastctr = 0;
 unsigned long pcisave;
 unsigned char vgasave;
+static int curdev = 0; /* 0 if kbd, 1 if mouse */
+
+static void cause_kbd_irq()
+{
+       outl(0x844, 0x0);
+       outl(0x848, 0x0);
+       while (inb(0x64) & 0x1)
+               inb(0x60);
+       outb(0x60, 0xee);       /* Cause an IRQ. */
+       while (inb(0x60) != 0xEE)
+               ;
+}
 
 void pci_dump() {
        unsigned long cts;
-       static int curdev = 0;  /* 0 if kbd, 1 if mouse */
                
        cts = inl(0x84C);
        
-       outl(0x848, 0x0);
        outl(0x840, 0x0);
+       outl(0x848, 0x0);
        switch(cts&0xF0000)
        {
        case 0x20000:
        {
                unsigned char b;
-               b = inb(cts & 0xFFFF);
-               //dologf("READ: %08x (%02x)", cts, b);
-               if ((cts & 0xFFFF) == 0x64)
-                       curdev = (b & 0x20) ? 1 : 0;
-
-               if ((curdev == 0) && ((cts & 0xFFFF) == 0x60))
+               
+               switch (cts & 0xFFFF)
                {
-                       /*  This is a keyboard read. */
-                       if (b == 0x01) {
-                               /* Reset. */
-                               outb(0xCF9, 0x4);
-                               return;
-                       }
-
-                       if (kbd_get_injected_scancode()) {
+               case 0x64:
+                       /* Read the real hardware and mask in our OBF if need be. */
+                       b = inb(0x64);
+                       if (kbd_has_injected_scancode())
+                       {
+                               dologf("OS wants to know; we have data");
+                               lastctr = counter;
+                               b |= 0x01;
+                               b &= ~0x20;     /* no mouse for you! */
+                               curdev = 0;
+                       } else 
+                               curdev = (b & 0x20) ? 1 : 0;
+                       *(unsigned char*)0xAFFD0 /* EAX */ = b;
+                       break;
+               case 0x60:
+                       if (kbd_has_injected_scancode())
+                       {
                                b = kbd_get_injected_scancode();
+                               lastctr = counter;
+                               while (inb(0x64) & 0x1)
+                                       inb(0x60);
+                       } else
+                               b = inb(0x60);
+                       if ((curdev == 0) && (b == 0x01)) {     /* Escape */
+                               outb(0xCF9, 0x4);       /* Reboot */
+                               return;
                        }
+                       
+                       /* If there is more nus to come, generate another IRQ. */
+                       if (kbd_has_injected_scancode())
+                               cause_kbd_irq();
+                       
+                       *(unsigned char*)0xAFFD0 /* EAX */ = b;
+                       break;
                }
 
                *(unsigned char*)0xAFFD0 /* EAX */ = b;
@@ -61,8 +93,9 @@ void pci_dump() {
                dolog("Unhandled PCI cycle");
        }
        
+       outl(0x840, 0x0);
+       outl(0x844, 0x1000);
        outl(0x848, 0x1000);
-       outl(0x840, 0x0100);
 }
 
 void timer_handler(smi_event_t ev)
@@ -72,6 +105,14 @@ void timer_handler(smi_event_t ev)
        smi_disable_event(SMI_EVENT_FAST_TIMER);
        smi_enable_event(SMI_EVENT_FAST_TIMER);
        
+       if (kbd_has_injected_scancode() && (counter > (lastctr + 2)))
+       {
+               smi_disable_event(SMI_EVENT_DEVTRAP_KBC);
+               dolog("Kicking timer");
+               cause_kbd_irq();
+               smi_enable_event(SMI_EVENT_DEVTRAP_KBC);
+       }
+       
        outb(0x80, (ticks++) & 0xFF);
        
        outlog();