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// MIT License, Copyright (c) 2020 Marvin Borner
#include <cpu.h>
#include <def.h>
#include <interrupts.h>
#include <mem.h>
#include <net.h>
#include <pci.h>
#include <print.h>
int rtl_irq = 0;
u8 mac[6];
u8 *rtl_rx_buffer;
u32 rtl_device_pci = 0;
u32 rtl_iobase = 0;
void rtl8139_find(u32 device, u16 vendor_id, u16 device_id, void *extra)
{
if ((vendor_id == 0x10ec) && (device_id == 0x8139)) {
*((u32 *)extra) = device;
}
}
void rtl8139_irq_handler()
{
print("RTL INT!\n");
u16 status = inw((u16)(rtl_iobase + 0x3E));
if (!status)
return;
outw((u16)(rtl_iobase + 0x3E), status);
if (status & 0x01 || status & 0x02) {
print("RECEIVE\n");
/* while ((inw((u16)(rtl_iobase + 0x37)) & 0x01) == 0) { */
// RECEIVE
/* } */
}
}
void rtl8139_init()
{
if (!rtl_device_pci)
return;
u16 command_reg = (u16)pci_read_field(rtl_device_pci, PCI_COMMAND, 4);
if ((command_reg & (1 << 2)) == 0) {
command_reg |= (1 << 2);
pci_write_field(rtl_device_pci, PCI_COMMAND, command_reg);
}
rtl_irq = pci_get_interrupt(rtl_device_pci);
irq_install_handler(rtl_irq, rtl8139_irq_handler);
u32 rtl_bar0 = pci_read_field(rtl_device_pci, PCI_BAR0, 4);
rtl_iobase = 0;
if (rtl_bar0 & 0x00000001)
rtl_iobase = rtl_bar0 & 0xFFFFFFFC;
// Get mac address
for (int i = 0; i < 6; ++i)
mac[i] = inb((u16)(rtl_iobase + 0x00 + i));
printf("Mac address: %x:%x:%x:%x:%x:%x\n", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]);
// Activate
outb((u16)(rtl_iobase + 0x52), 0x0);
// Reset
outb((u16)(rtl_iobase + 0x37), 0x10);
while ((inb((u16)(rtl_iobase + 0x37)) & 0x10) != 0)
;
// Set receive buffer
rtl_rx_buffer = (u8 *)malloc(8192 + 16);
outl((u16)(rtl_iobase + 0x30), (u32)rtl_rx_buffer);
// Enable ISR
outw((u16)(rtl_iobase + 0x3C), 0x0005);
// Accept packets
outl((u16)(rtl_iobase + 0x44), 0xf | (1 << 7));
// Enable receive and transmitter
outb((u16)(rtl_iobase + 0x37), 0x0C);
}
void net_install()
{
pci_scan(&rtl8139_find, -1, &rtl_device_pci);
if (rtl_device_pci)
print("Found rtl8139 card\n");
rtl8139_init();
}
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