From 40a9f29c441cbae2d574c075579c811d07e892e7 Mon Sep 17 00:00:00 2001
From: Andreas Baumann <mail@andreasbaumann.cc>
Date: Thu, 27 Jul 2017 21:41:59 +0200
Subject: work on rtl8139 driver, can trigger interrupts now

---
 src/drivers/net/rtl8139.c | 23 +++++++++++++----------
 src/drivers/net/rtl8139.h |  2 ++
 2 files changed, 15 insertions(+), 10 deletions(-)

(limited to 'src/drivers')

diff --git a/src/drivers/net/rtl8139.c b/src/drivers/net/rtl8139.c
index a24afbe..78a552a 100644
--- a/src/drivers/net/rtl8139.c
+++ b/src/drivers/net/rtl8139.c
@@ -2,18 +2,10 @@
 
 #include "string.h"
 #include "stdio.h"
+#include "stdlib.h"
 
 #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 = {
 	{
 	rtl8139_activate,
@@ -26,6 +18,7 @@ static rtl8139_vtable_t const rtl8139_vtable = {
 
 // registers
 #define REG_MAC0 0x00
+#define REG_RBSTART 0x30
 #define REG_CMD 0x37
 #define REG_IMR 0x3C
 #define REG_ISR 0x3E
@@ -80,6 +73,9 @@ static rtl8139_vtable_t const rtl8139_vtable = {
 	ISR_RECEIVE_BUFFER_OVERFLOW | ISR_TRANSMIT_ERROR | ISR_TRANSMIT_OK | \
 	ISR_RECEIVE_ERROR | ISR_RECEIVE_OK
 
+// for now we follow the guide line on OSDEV on the size of the receive buffer
+#define RECEIVE_BUFFER_SIZE 8192 + 16 
+ 
 void rtl8139_init( rtl8139_t *rtl8139, pci_device_descriptor_t *descriptor, interrupt_t *interrupt, void *context )
 {
 	memset( rtl8139, 0, sizeof( rtl8139_t ) );
@@ -94,6 +90,7 @@ void rtl8139_init( rtl8139_t *rtl8139, pci_device_descriptor_t *descriptor, inte
 		port8_init( &rtl8139->MAC_port[i], descriptor->port_base + REG_MAC0 + i );
 	}
 	port8_init( &rtl8139->CMD_port, descriptor->port_base + REG_CMD );
+	port32_init( &rtl8139->RBSTART_port, descriptor->port_base + REG_RBSTART );
 	port16_init( &rtl8139->IMR_port, descriptor->port_base + REG_IMR );
 	port16_init( &rtl8139->ISR_port, descriptor->port_base + REG_ISR );
 	port32_init( &rtl8139->TCR_port, descriptor->port_base + REG_TCR );
@@ -159,6 +156,10 @@ void rtl8139_init( rtl8139_t *rtl8139, pci_device_descriptor_t *descriptor, inte
 	port32_write( &rtl8139->TCR_port, TCR_IFG_STANDARD | TCR_MXDMA_2048 );
 	port32_write( &rtl8139->RCR_port, RCR_MXDMA_UNLIMITED | RCR_ACCEPT_BROADCAST | RCR_ACCEPT_PHYS_MATCH );
 
+	// allocate receive buffer and register it
+	rtl8139->receive_buffer = (uint8_t *)malloc( RECEIVE_BUFFER_SIZE );
+	port32_write( &rtl8139->RBSTART_port, (uint32_t)rtl8139->receive_buffer );
+
 	// register interrupts we are interested in (we want all and
 	// filter them in the interrupt handler), read ISR to clear
 	// the current values (if there are bits set)
@@ -189,7 +190,9 @@ void rtl8139_deactivate( void *obj )
 
 void rtl8139_deinit( void *obj )
 {
-	// nothing to do
+	rtl8139_t *rtl8139 = (rtl8139_t *)obj;
+	
+	free( rtl8139->receive_buffer );
 }
 
 uint32_t rtl8139_handle_interrupt( interrupt_handler_t *handler, uint32_t esp )
diff --git a/src/drivers/net/rtl8139.h b/src/drivers/net/rtl8139.h
index 66c9a22..91a7495 100644
--- a/src/drivers/net/rtl8139.h
+++ b/src/drivers/net/rtl8139.h
@@ -10,6 +10,7 @@
 typedef struct {
 	network_t base;
 	port8_t MAC_port[NOF_MAC_REGISTERS];
+	port32_t RBSTART_port;
 	port8_t CMD_port;
 	port16_t IMR_port;
 	port16_t ISR_port;
@@ -18,6 +19,7 @@ typedef struct {
 	pci_device_descriptor_t pci_descriptor;
 	uint32_t model_id;
 	const char *model;
+	uint8_t *receive_buffer;
 	interrupt_handler_t interrupt_handler;
 } rtl8139_t;
 
-- 
cgit v1.2.3-54-g00ecf