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/* SPDX-License-Identifier: GPL-2.0-only */
#include <acpi/acpigen.h>
#include <console/console.h>
#include <device/device.h>
#include "chip.h"
/* Generic DPTF participants have a PTYP field to distinguish them */
enum dptf_generic_participant_type {
DPTF_GENERIC_PARTICIPANT_TYPE_TSR = 0x3,
DPTF_GENERIC_PARTICIPANT_TYPE_CHARGER = 0xB,
};
#define DEFAULT_CHARGER_STR "Battery Charger"
#define DPTF_DEVICE_HID_EISAID "INT3400"
#define GENERIC_HID_EISAID "INT3403"
#define FAN_HID_EISAID "INT3404"
#define DPTF_DEVICE_HID "INTC1040"
#define GENERIC_HID "INTC1043"
#define FAN_HID "INTC1044"
/*
* Helper method to determine if a device is "used" (called out anywhere as a source or a target
* of any policies, and therefore should be included in the ACPI tables.
*/
static bool is_participant_used(const struct drivers_intel_dptf_config *config,
enum dptf_participant participant)
{
int i;
/* Active? */
for (i = 0; i < DPTF_MAX_ACTIVE_POLICIES; ++i)
if (config->policies.active[i].target == participant)
return true;
/* Passive? */
for (i = 0; i < DPTF_MAX_PASSIVE_POLICIES; ++i)
if (config->policies.passive[i].source == participant ||
config->policies.passive[i].target == participant)
return true;
/* Critical? */
for (i = 0; i < DPTF_MAX_CRITICAL_POLICIES; ++i)
if (config->policies.critical[i].source == participant)
return true;
/* Check fan as well (its use is implicit in the Active policy) */
if (participant == DPTF_FAN && config->policies.active[0].target != DPTF_NONE)
return true;
return false;
}
static const char *dptf_acpi_name(const struct device *dev)
{
return "DPTF";
}
/* Add custom tables and methods to SSDT */
static void dptf_fill_ssdt(const struct device *dev)
{
struct drivers_intel_dptf_config *config = config_of(dev);
dptf_write_active_policies(config->policies.active,
DPTF_MAX_ACTIVE_POLICIES);
dptf_write_passive_policies(config->policies.passive,
DPTF_MAX_PASSIVE_POLICIES);
dptf_write_critical_policies(config->policies.critical,
DPTF_MAX_CRITICAL_POLICIES);
/* Controls */
dptf_write_charger_perf(config->controls.charger_perf, DPTF_MAX_CHARGER_PERF_STATES);
dptf_write_fan_perf(config->controls.fan_perf, DPTF_MAX_FAN_PERF_STATES);
printk(BIOS_INFO, "\\_SB.DPTF: %s at %s\n", dev->chip_ops->name, dev_path(dev));
}
static int get_STA_value(const struct drivers_intel_dptf_config *config,
enum dptf_participant participant)
{
return is_participant_used(config, participant) ?
ACPI_STATUS_DEVICE_ALL_ON :
ACPI_STATUS_DEVICE_ALL_OFF;
}
static void dptf_write_generic_participant(const char *name,
enum dptf_generic_participant_type ptype,
const char *str, int sta_val)
{
/* Auto-incrementing UID for generic participants */
static int generic_uid = 0;
acpigen_write_device(name);
if (CONFIG(DPTF_USE_EISA_HID)) {
acpigen_write_name("_HID");
acpigen_emit_eisaid(GENERIC_HID_EISAID);
} else {
acpigen_write_name_string("_HID", GENERIC_HID);
}
acpigen_write_name_integer("_UID", generic_uid++);
acpigen_write_STA(sta_val);
if (str)
acpigen_write_name_string("_STR", str);
acpigen_write_name_integer("PTYP", ptype);
acpigen_pop_len(); /* Device */
}
/* Add static definitions of DPTF devices into the DSDT */
static void dptf_inject_dsdt(const struct device *dev)
{
const struct drivers_intel_dptf_config *config;
enum dptf_participant participant;
struct device *parent;
char name[5];
int i;
/* The CPU device gets an _ADR that matches the ACPI PCI address for 00:04.00 */
parent = dev && dev->bus ? dev->bus->dev : NULL;
if (!parent || parent->path.type != DEVICE_PATH_PCI) {
printk(BIOS_ERR, "%s: DPTF objects must live under 00:04.0 PCI device\n",
__func__);
return;
}
config = config_of(dev);
acpigen_write_scope("\\_SB");
/* DPTF CPU device - \_SB.TCPU */
acpigen_write_device("TCPU");
acpigen_write_ADR_pci_device(parent);
acpigen_write_STA(get_STA_value(config, DPTF_CPU));
acpigen_pop_len(); /* Device */
/* Toplevel DPTF device - \_SB.DPTF*/
acpigen_write_device(acpi_device_name(dev));
if (CONFIG(DPTF_USE_EISA_HID)) {
acpigen_write_name("_HID");
acpigen_emit_eisaid(DPTF_DEVICE_HID_EISAID);
} else {
acpigen_write_name_string("_HID", DPTF_DEVICE_HID);
}
acpigen_write_name_integer("_UID", 0);
acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON);
/*
* The following devices live underneath \_SB.DPTF:
* - Fan, \_SB.DPTF.TFN1
* - Charger, \_SB.DPTF.TCHG
* - Temperature Sensors, \_SB.DPTF.TSRn
*/
acpigen_write_device("TFN1");
if (CONFIG(DPTF_USE_EISA_HID)) {
acpigen_write_name("_HID");
acpigen_emit_eisaid(FAN_HID_EISAID);
} else {
acpigen_write_name_string("_HID", FAN_HID);
}
acpigen_write_name_integer("_UID", 0);
acpigen_write_STA(get_STA_value(config, DPTF_FAN));
acpigen_pop_len(); /* Device */
dptf_write_generic_participant("TCHG", DPTF_GENERIC_PARTICIPANT_TYPE_CHARGER,
DEFAULT_CHARGER_STR, get_STA_value(config,
DPTF_CHARGER));
for (i = 0, participant = DPTF_TEMP_SENSOR_0; i < 4; ++i, ++participant) {
snprintf(name, sizeof(name), "TSR%1d", i);
dptf_write_generic_participant(name, DPTF_GENERIC_PARTICIPANT_TYPE_TSR,
NULL, get_STA_value(config, participant));
}
acpigen_pop_len(); /* DPTF Device */
acpigen_pop_len(); /* Scope */
}
static struct device_operations dptf_ops = {
.read_resources = noop_read_resources,
.set_resources = noop_set_resources,
.acpi_name = dptf_acpi_name,
.acpi_fill_ssdt = dptf_fill_ssdt,
.acpi_inject_dsdt = dptf_inject_dsdt,
};
static void dptf_enable_dev(struct device *dev)
{
dev->ops = &dptf_ops;
}
struct chip_operations drivers_intel_dptf_ops = {
CHIP_NAME("Intel DPTF")
.enable_dev = dptf_enable_dev,
};
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