diff options
Diffstat (limited to 'src/kernel/net/rtl8139.c')
| -rw-r--r-- | src/kernel/net/rtl8139.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/src/kernel/net/rtl8139.c b/src/kernel/net/rtl8139.c new file mode 100644 index 0000000..a233004 --- /dev/null +++ b/src/kernel/net/rtl8139.c @@ -0,0 +1,99 @@ +#include <kernel/io/io.h> +#include <kernel/pci/pci.h> +#include <kernel/system.h> +#include <kernel/interrupts/interrupts.h> +#include <kernel/lib/stdlib/liballoc.h> + +int rtl_irq = 0; +uint8_t mac[6]; +uint8_t *rtl_rx_buffer; +uint32_t rtl_iobase = 0; +uint32_t rtl_device_pci = 0x00000000; + +void find_rtl(uint32_t device, uint16_t vendor_id, uint16_t device_id, void *extra) +{ + if ((vendor_id == 0x10ec) && (device_id == 0x8139)) { + *((uint32_t *) extra) = device; + } +} + +void rtl8139_irq_handler(struct regs *r) +{ + serial_write("RTL INT!\n"); + uint16_t status = inw(rtl_iobase + 0x3E); + if (!status) return; + outw(rtl_iobase + 0x3E, status); + + if (status & 0x01 || status & 0x02) { + while ((inw(rtl_iobase + 0x37) & 0x01) == 0) { + serial_write("RECEIVE\n"); + // RECEIVE + } + } +} + +int rtl8139_init(void) +{ + if (rtl_device_pci) { + uint16_t command_reg = 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, 4, command_reg); + } + + rtl_irq = pci_get_interrupt(rtl_device_pci); + irq_install_handler(rtl_irq, rtl8139_irq_handler); + + uint32_t rtl_bar0 = pci_read_field(rtl_device_pci, PCI_BAR0, 4); + // uint32_t 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(rtl_iobase + 0x00 + i); + info("Mac address: %2x:%2x:%2x:%2x:%2x:%2x", mac[0], mac[1], mac[2], mac[3], mac[4], mac[5]); + + // Activate (turn on) + outb(rtl_iobase + 0x52, 0x0); + + // Reset + outb(rtl_iobase + 0x37, 0x10); + while ((inb(rtl_iobase + 0x37) & 0x10) != 0) {} + + // Set receive buffer + rtl_rx_buffer = kmalloc(8192 + 16); + outl(rtl_iobase + 0x30, (uintptr_t) rtl_rx_buffer); + + // Enable ISR + outw(rtl_iobase + 0x3C, 0x0005); + + // Accept packets + outl(rtl_iobase + 0x44, 0xf | (1 << 7)); + + // Enable receive and transmitter + outb(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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