bootblock.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-or-later */
 
#include <bootblock_common.h>
#include <superio/ite/common/ite.h>
#include <superio/ite/it8786e/it8786e.h>
 
#define GPIO_DEV        PNP_DEV(0x2e, IT8786E_GPIO)
#define SERIAL1_DEV     PNP_DEV(0x2e, IT8786E_SP1)
#define SERIAL3_DEV     PNP_DEV(0x2e, IT8786E_SP3)
#define SERIAL4_DEV     PNP_DEV(0x2e, IT8786E_SP4)
#define SERIAL5_DEV     PNP_DEV(0x2e, IT8786E_SP5)
#define SERIAL6_DEV     PNP_DEV(0x2e, IT8786E_SP6)
 
void bootblock_mainboard_early_init(void)
{
        ite_conf_clkin(GPIO_DEV, ITE_UART_CLK_PREDIVIDE_24);
        ite_enable_3vsbsw(GPIO_DEV);
        ite_kill_watchdog(GPIO_DEV);
        ite_enable_serial(SERIAL1_DEV, CONFIG_TTYS0_BASE);
 
        /*
         * FIXME:
         * IT8786E has 6 COM ports, COM1/3/5 have default IO base 0x3f8 and
         * COM2/4/6 have 0x2f8. When enabling devices before setting resources
         * from devicetree, the output on debugging COM1 becomes very slow due
         * to the same IO bases for multiple COM ports. For now set different
         * hardcoded IO bases for COM3/4/5/6 ports, they will be set later to
         * desired values from devicetree. They can be also turned off.
         */
        ite_enable_serial(SERIAL3_DEV, 0x3e8);
        ite_enable_serial(SERIAL4_DEV, 0x2e8);
        ite_enable_serial(SERIAL5_DEV, 0x2f0);
        ite_enable_serial(SERIAL6_DEV, 0x2e0);
}