mainboard.c

Go to the documentation of this file.

/* SPDX-License-Identifier: GPL-2.0-only */
 
#include <acpi/acpi.h>
#include <baseboard/variants.h>
#include <boardid.h>
#include <console/console.h>
#include <device/device.h>
#include <ec/ec.h>
#include <gpio.h>
#include <nhlt.h>
#include <smbios.h>
#include <soc/gpio.h>
#include <soc/nhlt.h>
#include <string.h>
#include <variant/ec.h>
#include <variant/gpio.h>
 
/* override specific gpio by sku id */
const struct pad_config __weak
*variant_sku_gpio_table(size_t *num)
{
        *num = 0;
        return NULL;
}
 
static void mainboard_init(void *chip_info)
{
        int boardid;
        const struct pad_config *pads;
        size_t num;
 
        boardid = board_id();
        printk(BIOS_INFO, "Board ID: %d\n", boardid);
 
        pads = variant_gpio_table(&num);
        gpio_configure_pads(pads, num);
 
        pads = variant_sku_gpio_table(&num);
        gpio_configure_pads(pads, num);
 
        mainboard_ec_init();
 
        variant_board_ec_set_skuid();
}
 
/*
 * There are 2 pins on reef-like boards that can be used for SKU'ing
 * board differences. They each have optional stuffing for a pullup and
 * a pulldown. This way we can generate 9 different values with the
 * 2 pins.
 */
uint8_t sku_strapping_value(void)
{
        gpio_t board_sku_gpios[] = {
                [1] = GPIO_17, [0] = GPIO_16,
        };
        const size_t num = ARRAY_SIZE(board_sku_gpios);
 
        return gpio_base3_value(board_sku_gpios, num);
}
 
uint8_t __weak variant_board_sku(void)
{
        static int board_sku_num = -1;
 
        if (board_sku_num < 0)
                board_sku_num = sku_strapping_value();
 
        return board_sku_num;
}
 
/* Set variant board sku to ec by sku id */
void __weak variant_board_ec_set_skuid(void)
{
}
 
const char *smbios_system_sku(void)
{
        static char sku_str[7]; /* sku{0..255} */
 
        snprintf(sku_str, sizeof(sku_str), "sku%d", variant_board_sku());
 
        return sku_str;
}
 
void __weak variant_nhlt_oem_overrides(const char **oem_id,
                                                const char **oem_table_id,
                                                uint32_t *oem_revision)
{
        *oem_id = "reef";
        *oem_table_id = CONFIG_VARIANT_DIR;
        *oem_revision = variant_board_sku();
}
 
static unsigned long mainboard_write_acpi_tables(
        const struct device *device, unsigned long current, acpi_rsdp_t *rsdp)
{
        uintptr_t start_addr;
        uintptr_t end_addr;
        struct nhlt *nhlt;
        const char *oem_id = NULL;
        const char *oem_table_id = NULL;
        uint32_t oem_revision = 0;
 
        start_addr = current;
 
        nhlt = nhlt_init();
 
        if (nhlt == NULL)
                return start_addr;
 
        variant_nhlt_init(nhlt);
        variant_nhlt_oem_overrides(&oem_id, &oem_table_id, &oem_revision);
 
        end_addr = nhlt_soc_serialize_oem_overrides(nhlt, start_addr,
                        oem_id, oem_table_id, oem_revision);
 
        if (end_addr != start_addr)
                acpi_add_table(rsdp, (void *)start_addr);
 
        return end_addr;
}
 
static void mainboard_enable(struct device *dev)
{
        dev->ops->write_acpi_tables = mainboard_write_acpi_tables;
}
 
struct chip_operations mainboard_ops = {
        .init = mainboard_init,
        .enable_dev = mainboard_enable,
};