src/superio/smsc/lpc47b397/lpc47b397_early_serial.c

   1 #include <arch/romcc_io.h>
   2 #include "lpc47b397.h"
   3
   4 static inline void pnp_enter_conf_state(device_t dev) {
   5         unsigned port = dev>>8;
   6         outb(0x55, port);
   7 }
   8 static void pnp_exit_conf_state(device_t dev) {
   9         unsigned port = dev>>8;
  10         outb(0xaa, port);
  11 }
  12 static void lpc47b397_enable_serial(device_t dev, unsigned iobase)
  13 {
  14         pnp_enter_conf_state(dev);
  15         pnp_set_logical_device(dev);
  16         pnp_set_enable(dev, 0);
  17         pnp_set_iobase(dev, PNP_IDX_IO0, iobase);
  18         pnp_set_enable(dev, 1);
  19         pnp_exit_conf_state(dev);
  20 }