diff options
Diffstat (limited to 'src/ec/google/wilco/bootblock.c')
| -rw-r--r-- | src/ec/google/wilco/bootblock.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/ec/google/wilco/bootblock.c b/src/ec/google/wilco/bootblock.c new file mode 100644 index 0000000000..dadc5c9a77 --- /dev/null +++ b/src/ec/google/wilco/bootblock.c @@ -0,0 +1,52 @@ +/* + * 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 <device/pnp_def.h> +#include <swab.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(); +} |