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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpi_device.h>
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/i2c_simple.h>
#include <device/device.h>
#include "tpm.h"
#include "chip.h"
static void i2c_tpm_fill_ssdt(const struct device *dev)
{
struct acpi_dp *dsd;
struct drivers_i2c_tpm_config *config = dev->chip_info;
const char *scope = acpi_device_scope(dev);
struct acpi_i2c i2c = {
.address = dev->path.i2c.device,
.mode_10bit = dev->path.i2c.mode_10bit,
.speed = config->speed ? : I2C_SPEED_FAST,
.resource = scope,
};
if (!scope)
return;
if (!config->hid) {
printk(BIOS_ERR, "%s: ERROR: HID required\n", dev_path(dev));
return;
}
/* Device */
acpigen_write_scope(scope);
acpigen_write_device(acpi_device_name(dev));
acpigen_write_name_string("_HID", config->hid);
acpigen_write_name_integer("_UID", config->uid);
acpigen_write_name_string("_DDN", dev->chip_ops->name);
acpigen_write_STA(acpi_device_status(dev));
/* Resources */
acpigen_write_name("_CRS");
acpigen_write_resourcetemplate_header();
acpi_device_write_i2c(&i2c);
if (config->irq_gpio.pin_count)
acpi_device_write_gpio(&config->irq_gpio);
else
acpi_device_write_interrupt(&config->irq);
acpigen_write_resourcetemplate_footer();
/* _DSD, Device-Specific Data */
dsd = acpi_dp_new_table("_DSD");
switch (config->power_managed_mode) {
case TPM_FIRMWARE_POWER_MANAGED:
acpi_dp_add_integer(dsd, "firmware-power-managed", 1);
break;
case TPM_KERNEL_POWER_MANAGED:
acpi_dp_add_integer(dsd, "firmware-power-managed", 0);
break;
case TPM_DEFAULT_POWER_MANAGED:
default:
/* Leave firmware-power-managed unset */
break;
}
acpi_dp_write(dsd);
acpigen_pop_len(); /* Device */
acpigen_pop_len(); /* Scope */
printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev),
dev->chip_ops->name, dev_path(dev));
}
static const char *i2c_tpm_acpi_name(const struct device *dev)
{
return "TPMI";
}
static struct device_operations i2c_tpm_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.acpi_name = i2c_tpm_acpi_name,
.acpi_fill_ssdt = i2c_tpm_fill_ssdt,
};
static void i2c_tpm_enable(struct device *dev)
{
struct drivers_i2c_tpm_config *config = dev->chip_info;
dev->ops = &i2c_tpm_ops;
if (config && config->desc) {
dev->name = config->desc;
}
}
struct chip_operations drivers_i2c_tpm_ops = {
.name = "I2C TPM",
.enable_dev = i2c_tpm_enable
};
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