// MIT License, Copyright (c) 2020 Marvin Borner #include #include #include #include #include #include #include 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(); }