From 818d61794e7a3d4503acc9e922c134dfd1407476 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Sat, 22 Jul 2017 22:18:23 +0200
Subject: started to code RTL8139 network driver, for now setting io_base and
 IRQ

---
 doc/LINKS.TODO            |  1 +
 src/drivers/net/rtl8139.c | 39 +++++++++++++++++++++++++++++++++++++--
 src/drivers/net/rtl8139.h |  9 ++++++++-
 src/drivers/video/vga.c   |  2 ++
 4 files changed, 48 insertions(+), 3 deletions(-)

diff --git a/doc/LINKS.TODO b/doc/LINKS.TODO
index 3fe1944..557e598 100644
--- a/doc/LINKS.TODO
+++ b/doc/LINKS.TODO
@@ -112,3 +112,4 @@ http://wiki.osdev.org/Detecting_Memory_(x86)
 
 Networking:
 http://wiki.osdev.org/RTL8139
+http://lowlevel.eu/wiki/RTL8139
diff --git a/src/drivers/net/rtl8139.c b/src/drivers/net/rtl8139.c
index 4ae61e3..f895ff8 100644
--- a/src/drivers/net/rtl8139.c
+++ b/src/drivers/net/rtl8139.c
@@ -3,7 +3,16 @@
 #include "string.h"
 #include "stdio.h"
 
-#undef DEBUG
+#define DEBUG
+
+/*
+Offset (from IO base) 	Size 	Name
+0x08 	8 	MAR0-7
+0x30 	4 	RBSTART
+0x37 	1 	CMD
+0x3C 	2 	IMR
+0x3E 	2 	ISR 
+*/
 
 static rtl8139_vtable_t const rtl8139_vtable = {
 	{
@@ -14,12 +23,27 @@ static rtl8139_vtable_t const rtl8139_vtable = {
 	}
 };
 
-void rtl8139_init( rtl8139_t *rtl8139, interrupt_t *interrupt, void *context )
+#define REG_MAC0 0
+#define REG_MAC4 4
+
+void rtl8139_init( rtl8139_t *rtl8139, pci_device_descriptor_t *descriptor, interrupt_t *interrupt, void *context )
 {
 	memset( rtl8139, 0, sizeof( rtl8139_t ) );
 
 	network_init( (network_t *)rtl8139, interrupt, context );
 
+	puts( "Initializing driver for Realtek 8139 network card.." );
+#ifdef DEBUG
+	printf( "using I/O base 0x%X\n", descriptor->port_base );
+	printf( "using interrupt %d\n", descriptor->interrupt );
+#endif
+
+	port32_init( &rtl8139->MAC0_port, descriptor->port_base + REG_MAC0 );
+	port16_init( &rtl8139->MAC4_port, descriptor->port_base + REG_MAC4 );
+
+	interrupt_handler_init( &rtl8139->interrupt_handler, IRQ_BASE + descriptor->interrupt, interrupt, rtl8139_handle_interrupt, rtl8139 );
+	interrupts_register_interrupt_handler( rtl8139->interrupt_handler );
+
 	((driver_t *)rtl8139)->vtable = (driver_vtable_t *)&rtl8139_vtable;
 }
 
@@ -42,6 +66,17 @@ void rtl8139_deinit( void *obj )
 	// nothing to do
 }
 
+uint32_t rtl8139_handle_interrupt( interrupt_handler_t *handler, uint32_t esp )
+{
+	rtl8139_t *rtl8139 = (rtl8139_t *)handler->driver;
+
+#ifdef DEBUG
+	printf( "RTL INTERRUPT\n" );
+#endif
+
+	return esp;
+}
+
 void rtl8139_print_info( void *obj )
 {
 	puts( "Realtek 8139 network card driver" );
diff --git a/src/drivers/net/rtl8139.h b/src/drivers/net/rtl8139.h
index a255d65..ce59cb1 100644
--- a/src/drivers/net/rtl8139.h
+++ b/src/drivers/net/rtl8139.h
@@ -2,19 +2,26 @@
 #define RTL8139_H
 
 #include "network.h"
+#include "pci.h"
+#include "port.h"
 
 typedef struct {
 	network_t base;
+	port32_t MAC0_port;
+	port16_t MAC4_port;
+	interrupt_handler_t interrupt_handler;
 } rtl8139_t;
 
 typedef struct {
 	network_vtable_t base;
 } rtl8139_vtable_t;
 
-void rtl8139_init( rtl8139_t *rtl8139, interrupt_t *interrupt, void *context );
+void rtl8139_init( rtl8139_t *rtl8139, pci_device_descriptor_t *descriptor, interrupt_t *interrupt, void *context );
 void rtl8139_activate( void *obj );
 void rtl8139_deactivate( void *obj );
 void rtl8139_deinit( void *obj );
 void rtl8139_print_info( void *obj );
 
+uint32_t rtl8139_handle_interrupt( interrupt_handler_t *handler, uint32_t esp );
+
 #endif // RTL8139_H
diff --git a/src/drivers/video/vga.c b/src/drivers/video/vga.c
index 456e539..670df02 100644
--- a/src/drivers/video/vga.c
+++ b/src/drivers/video/vga.c
@@ -101,6 +101,8 @@ static vga_mode_t modes[] = {
 void vga_init( vga_t *vga, interrupt_t *interrupt, void *context )
 {
 	memset( vga, 0, sizeof( vga_t ) );
+
+	puts( "Initializing driver for generic VGA video card.." );
 	
 	video_init( (video_t *)vga, interrupt, context );
 
-- 
cgit v1.2.3-54-g00ecf