| /* 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; |
| } |