| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright 2018 Google LLC |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; version 2 of the License. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <arch/io.h> |
| #include <endian.h> |
| #include <device/pnp_ops.h> |
| #include <device/pnp_def.h> |
| |
| #include "bootblock.h" |
| |
| #define PNP_CFG_IDX 0x2e |
| #define PNP_LDN_SERIAL 0x0d |
| |
| static void pnp_enter_conf_state(pnp_devfn_t dev) |
| { |
| outb(0x55, PNP_CFG_IDX); |
| outb(0x55, PNP_CFG_IDX); |
| } |
| |
| static void pnp_exit_conf_state(pnp_devfn_t dev) |
| { |
| outb(0xaa, PNP_CFG_IDX); |
| } |
| |
| static void wilco_ec_serial_init(void) |
| { |
| pnp_devfn_t dev = PNP_DEV(PNP_CFG_IDX, PNP_LDN_SERIAL); |
| |
| pnp_enter_conf_state(dev); |
| pnp_set_logical_device(dev); |
| pnp_set_enable(dev, 1); |
| pnp_set_iobase(dev, PNP_IDX_IO1, cpu_to_be16(CONFIG_TTYS0_BASE)); |
| pnp_write_config(dev, PNP_IDX_IO0, 1); |
| pnp_exit_conf_state(dev); |
| } |
| |
| void wilco_ec_early_init(void) |
| { |
| if (IS_ENABLED(CONFIG_DRIVERS_UART_8250IO)) |
| wilco_ec_serial_init(); |
| } |