diff options
Diffstat (limited to 'src/superio/smsc/lpc47b397/lpc47b397_early_serial.c')
| -rw-r--r-- | src/superio/smsc/lpc47b397/lpc47b397_early_serial.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/superio/smsc/lpc47b397/lpc47b397_early_serial.c b/src/superio/smsc/lpc47b397/lpc47b397_early_serial.c new file mode 100644 index 0000000000..2a3d3dbd31 --- /dev/null +++ b/src/superio/smsc/lpc47b397/lpc47b397_early_serial.c @@ -0,0 +1,20 @@ +#include <arch/romcc_io.h> +#include "lpc47b397.h" + +static inline void pnp_enter_conf_state(device_t dev) { + unsigned port = dev>>8; + outb(0x55, port); +} +static void pnp_exit_conf_state(device_t dev) { + unsigned port = dev>>8; + outb(0xaa, port); +} +static void lpc47b397_enable_serial(device_t dev, unsigned iobase) +{ + pnp_enter_conf_state(dev); + pnp_set_logical_device(dev); + pnp_set_enable(dev, 0); + pnp_set_iobase(dev, PNP_IDX_IO0, iobase); + pnp_set_enable(dev, 1); + pnp_exit_conf_state(dev); +} |