| /* 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"; |
| } |
| |
| 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; |
| } |
| |
| /* Devices with GENERIC _HID (distinguished by PTYP) */ |
| 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); |
| acpigen_write_name("_HID"); |
| if (CONFIG(DPTF_USE_EISA_HID)) |
| acpigen_emit_eisaid(GENERIC_HID_EISAID); |
| else |
| acpigen_write_string(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 */ |
| } |
| |
| /* \_SB.PCI0.TCPU */ |
| static void write_tcpu(const struct device *pci_dev, |
| const struct drivers_intel_dptf_config *config) |
| { |
| /* DPTF CPU device - \_SB.PCI0.TCPU */ |
| acpigen_write_scope(TCPU_SCOPE); |
| acpigen_write_device("TCPU"); |
| acpigen_write_ADR_pci_device(pci_dev); |
| acpigen_write_STA(get_STA_value(config, DPTF_CPU)); |
| acpigen_pop_len(); /* Device */ |
| acpigen_pop_len(); /* TCPU Scope */ |
| } |
| |
| /* \_SB.DPTF.TFN1 */ |
| static void write_fan(const struct drivers_intel_dptf_config *config) |
| { |
| acpigen_write_device("TFN1"); |
| acpigen_write_name("_HID"); |
| if (CONFIG(DPTF_USE_EISA_HID)) |
| acpigen_emit_eisaid(FAN_HID_EISAID); |
| else |
| acpigen_write_string(FAN_HID); |
| |
| acpigen_write_name_integer("_UID", 0); |
| acpigen_write_STA(get_STA_value(config, DPTF_FAN)); |
| acpigen_pop_len(); /* Device */ |
| } |
| |
| /* \_SB.DPTF.xxxx */ |
| static void write_generic_devices(const struct drivers_intel_dptf_config *config) |
| { |
| enum dptf_participant participant; |
| char name[ACPI_NAME_BUFFER_SIZE]; |
| int i; |
| |
| 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)); |
| } |
| } |
| |
| /* \_SB.DPTF - note: leaves the Scope open for child devices*/ |
| static void write_open_dptf_device(const struct device *dev) |
| { |
| acpigen_write_scope("\\_SB"); |
| acpigen_write_device(acpi_device_name(dev)); |
| acpigen_write_name("_HID"); |
| if (CONFIG(DPTF_USE_EISA_HID)) |
| acpigen_emit_eisaid(DPTF_DEVICE_HID_EISAID); |
| else |
| acpigen_write_string(DPTF_DEVICE_HID); |
| |
| acpigen_write_name_integer("_UID", 0); |
| acpigen_write_STA(ACPI_STATUS_DEVICE_ALL_ON); |
| } |
| |
| /* Add minimal definitions of DPTF devices into the SSDT */ |
| static void write_device_definitions(const struct device *dev) |
| { |
| const struct drivers_intel_dptf_config *config; |
| struct device *parent; |
| |
| /* 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); |
| write_tcpu(parent, config); |
| write_open_dptf_device(dev); |
| write_fan(config); |
| write_generic_devices(config); |
| |
| acpigen_pop_len(); /* DPTF Device (write_open_dptf_device) */ |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| /* Emites policy definitions for each policy type */ |
| static void write_policies(const struct drivers_intel_dptf_config *config) |
| { |
| dptf_write_enabled_policies(config->policies.active, DPTF_MAX_ACTIVE_POLICIES, |
| config->policies.passive, DPTF_MAX_PASSIVE_POLICIES, |
| config->policies.critical, DPTF_MAX_CRITICAL_POLICIES); |
| |
| 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); |
| } |
| |
| /* Writes other static tables that are used by DPTF */ |
| static void write_controls(const struct drivers_intel_dptf_config *config) |
| { |
| 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); |
| dptf_write_power_limits(&config->controls.power_limits); |
| } |
| |
| /* Options to control the behavior of devices */ |
| static void write_options(const struct drivers_intel_dptf_config *config) |
| { |
| enum dptf_participant p; |
| int i; |
| |
| /* Fan options */ |
| dptf_write_fan_options(config->options.fan.fine_grained_control, |
| config->options.fan.step_size, |
| config->options.fan.low_speed_notify); |
| |
| /* TSR options */ |
| for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_3; ++p, ++i) { |
| if (is_participant_used(config, p) && (config->options.tsr[i].hysteresis || |
| config->options.tsr[i].desc)) { |
| dptf_write_scope(p); |
| dptf_write_tsr_hysteresis(config->options.tsr[i].hysteresis); |
| dptf_write_STR(config->options.tsr[i].desc); |
| acpigen_pop_len(); /* Scope */ |
| } |
| } |
| } |
| |
| /* 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); |
| |
| write_device_definitions(dev); |
| write_policies(config); |
| write_controls(config); |
| write_options(config); |
| |
| printk(BIOS_INFO, DPTF_DEVICE_PATH ": %s at %s\n", dev->chip_ops->name, dev_path(dev)); |
| } |
| |
| 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, |
| }; |
| |
| 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, |
| }; |