Change license from GPLv3 to LGPLv3.

[seabios.git] / src / serial.c

diff --git a/src/serial.c b/src/serial.c
index c620a0fad9f5ee31f1f26312287ba1f5905f82f8..6de66368d7e7af6c119d690bac06c6d98b549bb6 100644 (file)
--- a/src/serial.c
+++ b/src/serial.c
@@ -3,16 +3,49 @@
 // Copyright (C) 2008  Kevin O'Connor <kevin@koconnor.net>
 // Copyright (C) 2002  MandrakeSoft S.A.
 //
-// This file may be distributed under the terms of the GNU GPLv3 license.
+// This file may be distributed under the terms of the GNU LGPLv3 license.
 
-#include "biosvar.h" // struct bregs
+#include "biosvar.h" // SET_BDA
 #include "util.h" // debug_enter
+#include "bregs.h" // struct bregs
 
 
 /****************************************************************
  * COM ports
  ****************************************************************/
 
+static u16
+detect_serial(u16 port, u8 timeout, u8 count)
+{
+    outb(0x02, port+1);
+    if (inb(port+1) != 0x02)
+        return 0;
+    if (inb(port+2) != 0x02)
+        return 0;
+    outb(0x00, port+1);
+    SET_BDA(port_com[count], port);
+    SET_BDA(com_timeout[count], timeout);
+    return 1;
+}
+
+void
+serial_setup()
+{
+    if (! CONFIG_SERIAL)
+        return;
+    dprintf(3, "init serial\n");
+
+    u16 count = 0;
+    count += detect_serial(0x3f8, 0x0a, count);
+    count += detect_serial(0x2f8, 0x0a, count);
+    count += detect_serial(0x3e8, 0x0a, count);
+    count += detect_serial(0x2e8, 0x0a, count);
+
+    // Equipment word bits 9..11 determing # serial ports
+    u16 eqb = GET_BDA(equipment_list_flags);
+    SET_BDA(equipment_list_flags, (eqb & 0xf1ff) | (count << 9));
+}
+
 static u16
 getComAddr(struct bregs *regs)
 {
@@ -26,6 +59,7 @@ getComAddr(struct bregs *regs)
     return addr;
 }
 
+// SERIAL - INITIALIZE PORT
 static void
 handle_1400(struct bregs *regs)
 {
@@ -47,6 +81,7 @@ handle_1400(struct bregs *regs)
     set_success(regs);
 }
 
+// SERIAL - WRITE CHARACTER TO PORT
 static void
 handle_1401(struct bregs *regs)
 {
@@ -70,6 +105,7 @@ handle_1401(struct bregs *regs)
     set_success(regs);
 }
 
+// SERIAL - READ CHARACTER FROM PORT
 static void
 handle_1402(struct bregs *regs)
 {
@@ -94,6 +130,7 @@ handle_1402(struct bregs *regs)
     set_success(regs);
 }
 
+// SERIAL - GET PORT STATUS
 static void
 handle_1403(struct bregs *regs)
 {
@@ -116,7 +153,11 @@ handle_14XX(struct bregs *regs)
 void VISIBLE16
 handle_14(struct bregs *regs)
 {
-    debug_enter(regs);
+    debug_enter(regs, DEBUG_HDL_14);
+    if (! CONFIG_SERIAL) {
+        handle_14XX(regs);
+        return;
+    }
 
     irq_enable();
 
@@ -134,6 +175,37 @@ handle_14(struct bregs *regs)
  * LPT ports
  ****************************************************************/
 
+static u16
+detect_parport(u16 port, u8 timeout, u8 count)
+{
+    // clear input mode
+    outb(inb(port+2) & 0xdf, port+2);
+
+    outb(0xaa, port);
+    if (inb(port) != 0xaa)
+        // Not present
+        return 0;
+    SET_BDA(port_lpt[count], port);
+    SET_BDA(lpt_timeout[count], timeout);
+    return 1;
+}
+
+void
+lpt_setup()
+{
+    if (! CONFIG_LPT)
+        return;
+    dprintf(3, "init lpt\n");
+
+    u16 count = 0;
+    count += detect_parport(0x378, 0x14, count);
+    count += detect_parport(0x278, 0x14, count);
+
+    // Equipment word bits 14..15 determing # parallel ports
+    u16 eqb = GET_BDA(equipment_list_flags);
+    SET_BDA(equipment_list_flags, (eqb & 0x3fff) | (count << 14));
+}
+
 static u16
 getLptAddr(struct bregs *regs)
 {
@@ -217,7 +289,11 @@ handle_17XX(struct bregs *regs)
 void VISIBLE16
 handle_17(struct bregs *regs)
 {
-    debug_enter(regs);
+    debug_enter(regs, DEBUG_HDL_17);
+    if (! CONFIG_LPT) {
+        handle_17XX(regs);
+        return;
+    }
 
     irq_enable();