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#include <interrupts/interrupts.h>
#include <io/io.h>
#include <lib/stdio.h>
#include <memory/alloc.h>
#include <pci/pci.h>
#include <system.h>
int rtl_irq = 0;
u8 mac[6];
u8 *rtl_rx_buffer;
u32 rtl_iobase = 0;
u32 rtl_device_pci = 0x00000000;
void find_rtl(u32 device, u16 vendor_id, u16 device_id, void *extra)
{
if ((vendor_id == 0x10ec) && (device_id == 0x8139)) {
*((u32 *)extra) = device;
}
}
void rtl8139_irq_handler(struct regs *r)
{
log("RTL INT!");
u16 status = inw((u16)(rtl_iobase + 0x3E));
if (!status)
return;
outw((u16)(rtl_iobase + 0x3E), status);
if (status & 0x01 || status & 0x02) {
while ((inw((u16)(rtl_iobase + 0x37)) & 0x01) == 0) {
log("RECEIVE");
// RECEIVE
}
}
}
int rtl8139_init(void)
{
if (rtl_device_pci) {
u16 command_reg = (u16)pci_read_field(rtl_device_pci, PCI_COMMAND, 4);
if (command_reg & (1 << 2)) {
} else {
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);
// u32 rtl_bar1 = pci_read_field(rtl_device_pci, PCI_BAR1, 4);
rtl_iobase = 0x00000000;
if (rtl_bar0 & 0x00000001)
rtl_iobase = rtl_bar0 & 0xFFFFFFFC;
else
warn("RTL8139 should be using an I/O BAR!");
// Get mac address
for (int i = 0; i < 6; ++i)
mac[i] = inb((u16)(rtl_iobase + 0x00 + i));
debug("Mac address: %2x:%2x:%2x:%2x:%2x:%2x", mac[0], mac[1], mac[2], mac[3],
mac[4], mac[5]);
// Activate (turn on)
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 *)kmalloc(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);
} else {
return -1;
}
return 0;
}
void rtl8139_install()
{
pci_scan(&find_rtl, -1, &rtl_device_pci);
if (!rtl_device_pci) {
warn("No rtl8139 network card found");
return;
}
if (rtl8139_init() == 0)
info("Installed rtl8139 network driver");
}
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