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/* SPDX-License-Identifier: GPL-2.0-only */
#include <string.h>
#include <console/console.h>
#include <acpi/acpi.h>
#include <device/device.h>
#include "mainboard.h"
static long acpi_create_ecdt(acpi_ecdt_t * ecdt)
{
/* Attention: Make sure these match the values from
* the DSDT's ec.asl
*/
static const char ec_id[] = "\\_SB.PCI0.LPCB.EC0";
int ecdt_len = sizeof(acpi_ecdt_t) + strlen(ec_id) + 1;
acpi_header_t *header = &(ecdt->header);
memset((void *)ecdt, 0, ecdt_len);
/* fill out header fields */
memcpy(header->signature, "ECDT", 4);
memcpy(header->oem_id, OEM_ID, 6);
memcpy(header->oem_table_id, ACPI_TABLE_CREATOR, 8);
memcpy(header->asl_compiler_id, ASLC, 4);
header->length = ecdt_len;
header->revision = 1;
/* Location of the two EC registers */
ecdt->ec_control.space_id = ACPI_ADDRESS_SPACE_IO;
ecdt->ec_control.bit_width = 8;
ecdt->ec_control.bit_offset = 0;
ecdt->ec_control.addrl = 0x66;
ecdt->ec_control.addrh = 0;
ecdt->ec_data.space_id = ACPI_ADDRESS_SPACE_IO;
ecdt->ec_data.bit_width = 8;
ecdt->ec_data.bit_offset = 0;
ecdt->ec_data.addrl = 0x62;
ecdt->ec_data.addrh = 0;
ecdt->uid = 1; // Must match _UID of the EC0 node.
ecdt->gpe_bit = 23; // SCI interrupt within GPEx_STS
memcpy(ecdt->ec_id, ec_id, sizeof(ec_id));
header->checksum =
acpi_checksum((void *)ecdt, ecdt_len);
return header->length;
}
unsigned long mainboard_write_acpi_tables(const struct device *device,
unsigned long start,
acpi_rsdp_t *rsdp)
{
unsigned long current;
acpi_header_t *ecdt;
current = start;
/* Align ACPI tables to 16byte */
current = acpi_align_current(current);
printk(BIOS_DEBUG, "ACPI: * ECDT\n");
ecdt = (acpi_header_t *)current;
current += acpi_create_ecdt((acpi_ecdt_t *)current);
current = acpi_align_current(current);
acpi_add_table(rsdp, ecdt);
printk(BIOS_DEBUG, "current = %lx\n", current);
return current;
}
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