src/mainboard/asrock/b75pro3-m/early_init.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <bootblock_common.h>
   4 #include <device/pnp_ops.h>
   5 #include <superio/nuvoton/nct6776/nct6776.h>
   6 #include <superio/nuvoton/common/nuvoton.h>
   7
   8 #define SERIAL_DEV PNP_DEV(0x2e, NCT6776_SP1)
   9
  10 void bootblock_mainboard_early_init(void)
  11 {
  12         /* Set GPIOs on superio, enable UART */
  13         nuvoton_pnp_enter_conf_state(SERIAL_DEV);
  14         pnp_set_logical_device(SERIAL_DEV);
  15
  16         pnp_write_config(SERIAL_DEV, 0x1c, 0x80);
  17         pnp_write_config(SERIAL_DEV, 0x27, 0x80);
  18         pnp_write_config(SERIAL_DEV, 0x2a, 0x60);
  19
  20         nuvoton_pnp_exit_conf_state(SERIAL_DEV);
  21
  22         nuvoton_enable_serial(SERIAL_DEV, CONFIG_TTYS0_BASE);
  23 }