src/superio/winbond/w83977tf/w83977tf_early_serial.c

   1 #include <arch/romcc_io.h>
   2 #include "w83977tf.h"
   3
   4 static inline void pnp_enter_ext_func_mode(device_t dev)
   5 {
   6         unsigned int port = dev >> 8;
   7         outb(0x87, port);
   8         outb(0x87, port);
   9 }
  10
  11 static void pnp_exit_ext_func_mode(device_t dev)
  12 {
  13         unsigned int port = dev >> 8;
  14         outb(0xaa, port);
  15 }
  16
  17 static void w83977tf_enable_serial(device_t dev, unsigned int iobase)
  18 {
  19         pnp_enter_ext_func_mode(dev);
  20         pnp_set_logical_device(dev);
  21         pnp_set_enable(dev, 0);
  22         pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
  23         pnp_set_enable(dev, 1);
  24         pnp_exit_ext_func_mode(dev);
  25 }