src/mainboard/google/hatch/variants/kohaku/gpio.c

/*
 * This file is part of the coreboot project.
 *
 * Copyright 2019 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/acpi.h>
#include <baseboard/gpio.h>
#include <baseboard/variants.h>
#include <commonlib/helpers.h>

static const struct pad_config gpio_table[] = {
	/* A0  : RCIN# ==> NC */
	PAD_NC(GPP_A0, NONE),
	/* A6  : SERIRQ ==> NC */
	PAD_NC(GPP_A6, NONE),
	/* A10 : GPP_A10 ==> NC */
	PAD_NC(GPP_A10, NONE),
	/* A16 : EMR_GARAGE_DET (notification) */
	PAD_CFG_GPI_GPIO_DRIVER(GPP_A16, NONE, PLTRST),
	/* A17 : PIRQA# ==> NC */
	PAD_NC(GPP_A17, NONE),
	/* A18 : ISH_GP0 ==> NC */
	PAD_NC(GPP_A18, NONE),
	/* A19 : PEN_RESET_ODL */
	PAD_CFG_GPO(GPP_A19, 0, DEEP),
	/* A20 : ISH_GP2 ==> NC */
	PAD_NC(GPP_A20, NONE),
	/* A22 : ISH_GP4 ==> NC */
	PAD_NC(GPP_A22, NONE),
	/* B8  : SRCCLKREQ3#: NC  */
	PAD_NC(GPP_B8, NONE),
	/* C1  : SMBDATA: NC  */
	PAD_NC(GPP_C1, NONE),
	/* C7  : PEN_IRQ_OD_L */
	PAD_CFG_GPI_APIC(GPP_C7, NONE, PLTRST, LEVEL, INVERT),
	/* C12 : EN_PP3300_TSP_DX */
	PAD_CFG_GPO(GPP_C12, 0, DEEP),
	/* C15 : EN_PP3300_DIG_DX */
	PAD_CFG_GPO(GPP_C15, 0, DEEP),
	/* C23 : UART2_CTS# ==> NC */
	PAD_NC(GPP_C23, NONE),
	/* D16 : TOUCHSCREEN_INT_L */
	PAD_CFG_GPI_APIC(GPP_D16, NONE, PLTRST, LEVEL, INVERT),
	/* E23 : GPP_E23 ==> NC */
	PAD_NC(GPP_E23, NONE),
	/* F1 : GPP_F1 ==> NC */
	PAD_NC(GPP_F1, NONE),
	/* F11 : PCH_MEM_STRAP2 */
	PAD_CFG_GPI(GPP_F11, NONE, PLTRST),
	/* F20 : PCH_MEM_STRAP0 */
	PAD_CFG_GPI(GPP_F20, NONE, PLTRST),
	/* F21 : PCH_MEM_STRAP1 */
	PAD_CFG_GPI(GPP_F21, NONE, PLTRST),
	/* F22 : PCH_MEM_STRAP3 */
	PAD_CFG_GPI(GPP_F22, NONE, PLTRST),
	/* G0 : GPP_G0 ==> NC  */
	PAD_NC(GPP_G0, NONE),
	/* G1 : GPP_G1 ==> NC  */
	PAD_NC(GPP_G1, NONE),
	/* G2 : GPP_G2 ==> NC  */
	PAD_NC(GPP_G2, NONE),
	/* G3 : GPP_G3 ==> NC  */
	PAD_NC(GPP_G3, NONE),
	/* G4 : GPP_G4 ==> NC  */
	PAD_NC(GPP_G4, NONE),
	/* G5 : GPP_G5 ==> NC  */
	PAD_NC(GPP_G5, NONE),
	/* G6 : GPP_G6 ==> NC  */
	PAD_NC(GPP_G6, NONE),
	/* H4  : PCH_I2C_PEN_SDA */
	PAD_CFG_NF(GPP_H4, NONE, DEEP, NF1),
	/* H5  : PCH_I2C_PEN_SCL */
	PAD_CFG_NF(GPP_H5, NONE, DEEP, NF1),
};

const struct pad_config *override_gpio_table(size_t *num)
{
	*num = ARRAY_SIZE(gpio_table);
	return gpio_table;
}

/*
 * GPIOs configured before ramstage
 * Note: the Hatch platform's romstage will configure
 * the MEM_STRAP_* (a.k.a GPIO_MEM_CONFIG_*) pins
 * as inputs before it reads them, so they are not
 * needed in this table.
 */
static const struct pad_config early_gpio_table[] = {
	/* B15 : H1_SLAVE_SPI_CS_L */
	PAD_CFG_NF(GPP_B15, NONE, DEEP, NF1),
	/* B16 : H1_SLAVE_SPI_CLK */
	PAD_CFG_NF(GPP_B16, NONE, DEEP, NF1),
	/* B17 : H1_SLAVE_SPI_MISO_R */
	PAD_CFG_NF(GPP_B17, NONE, DEEP, NF1),
	/* B18 : H1_SLAVE_SPI_MOSI_R */
	PAD_CFG_NF(GPP_B18, NONE, DEEP, NF1),
	/* C14 : BT_DISABLE_L */
	PAD_CFG_GPO(GPP_C14, 0, DEEP),
	/* PCH_WP_OD */
	PAD_CFG_GPI(GPP_C20, NONE, DEEP),
	/* C21 : H1_PCH_INT_ODL */
	PAD_CFG_GPI_APIC(GPP_C21, NONE, PLTRST, LEVEL, INVERT),
	/* E1  : M2_SSD_PEDET */
	PAD_CFG_NF(GPP_E1, NONE, DEEP, NF1),
	/* E5  : SATA_DEVSLP1 */
	PAD_CFG_NF(GPP_E5, NONE, PLTRST, NF1),
	/* F2  : MEM_CH_SEL */
	PAD_CFG_GPI(GPP_F2, NONE, PLTRST),
	/* F11 : PCH_MEM_STRAP2 */
	PAD_CFG_GPI(GPP_F11, NONE, PLTRST),
	/* F20 : PCH_MEM_STRAP0 */
	PAD_CFG_GPI(GPP_F20, NONE, PLTRST),
	/* F21 : PCH_MEM_STRAP1 */
	PAD_CFG_GPI(GPP_F21, NONE, PLTRST),
	/* F22 : PCH_MEM_STRAP3 */
	PAD_CFG_GPI(GPP_F22, NONE, PLTRST),
};

const struct pad_config *variant_early_gpio_table(size_t *num)
{
	*num = ARRAY_SIZE(early_gpio_table);
	return early_gpio_table;
}

/*
 * Default GPIO settings before entering non-S5 sleep states.
 * Configure A12: FPMCU_RST_ODL as GPO before entering sleep.
 * This guarantees that A12's native3 function is disabled.
 * See https://review.coreboot.org/c/coreboot/+/32111 .
 */
static const struct pad_config default_sleep_gpio_table[] = {
	PAD_CFG_GPO(GPP_A12, 1, DEEP), /* FPMCU_RST_ODL */
};

/*
 * GPIO settings before entering S5, which are same as
 * default_sleep_gpio_table but also, turn off FPMCU.
 */
static const struct pad_config s5_sleep_gpio_table[] = {
	PAD_CFG_GPO(GPP_A12, 0, DEEP), /* FPMCU_RST_ODL */
	PAD_CFG_GPO(GPP_C11, 0, DEEP), /* PCH_FP_PWR_EN */
};

const struct pad_config *variant_sleep_gpio_table(u8 slp_typ, size_t *num)
{
	if (slp_typ == ACPI_S5) {
		*num = ARRAY_SIZE(s5_sleep_gpio_table);
		return s5_sleep_gpio_table;
	}
	*num = ARRAY_SIZE(default_sleep_gpio_table);
	return default_sleep_gpio_table;
}