| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <acpi/acpigen.h> |
| #include <acpi/acpigen_dptf.h> |
| #include <ec/google/common/dptf.h> |
| #include <drivers/intel/dptf/chip.h> |
| #include <stdio.h> |
| |
| #include "chip.h" |
| /* |
| * The Chrome EC is typically in charge of many system functions, including battery charging and |
| * fan PWM control. This places it in the middle of a DPTF implementation and therefore, many of |
| * the "helper" ACPI Methods themselves call EC Methods. Because of that, the responsibility for |
| * producing the corresponding AML lies here. |
| */ |
| |
| /* DPTF Event types */ |
| enum { |
| TRIP_POINTS_CHANGED_EVENT = 0x81, |
| THERMAL_EVENT = 0x90, |
| }; |
| |
| /* EC constants */ |
| enum { |
| EC_FAN_DUTY_AUTO = 0xFF, |
| }; |
| |
| /* Return the fan number as a string for the FAN participant */ |
| static const char *fan_num_namestring_of(enum dptf_participant participant) |
| { |
| switch (participant) { |
| case DPTF_FAN: |
| return "FAN0"; |
| case DPTF_FAN_2: |
| return "FAN1"; |
| default: |
| return ""; |
| } |
| } |
| |
| static void write_charger_PPPC(const struct device *ec) |
| { |
| acpigen_write_method_serialized("PPPC", 0); |
| |
| /* |
| * Convert size of PPSS table to index |
| * |
| * Store (SizeOf (PPSS), Local0) |
| * Decrement (Local0) |
| */ |
| acpigen_write_store(); |
| acpigen_emit_byte(SIZEOF_OP); |
| acpigen_emit_namestring("PPSS"); |
| acpigen_emit_byte(LOCAL0_OP); |
| acpigen_emit_byte(DECREMENT_OP); |
| acpigen_emit_byte(LOCAL0_OP); |
| |
| /* |
| * Check if charging is disabled (AC removed) |
| * |
| * If (\_SB.PCI0.LPCB.EC0.ACEX () = Zero) { |
| * Return (Local0) |
| * } |
| */ |
| acpigen_write_if(); |
| acpigen_emit_byte(LEQUAL_OP); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "ACEX")); |
| acpigen_emit_byte(ZERO_OP); |
| acpigen_write_return_op(LOCAL0_OP); |
| acpigen_pop_len(); /* If */ |
| |
| /* Return highest power state (index 0) */ |
| acpigen_write_return_op(ZERO_OP); |
| |
| acpigen_pop_len(); /* Method */ |
| } |
| |
| static void write_charger_SPPC(const struct device *ec) |
| { |
| /* |
| * SPPC - Set charger current limit |
| * Method(SPPC, 1) { |
| * Store (DeRefOf (Index (DeRefOf (Index |
| * (PPSS, ToInteger (Arg0))), 4)), Local0) |
| * \_SB.PCI0.LPCB.EC0.CHGS (Local0) |
| * } |
| */ |
| |
| acpigen_write_method_serialized("SPPC", 1); |
| |
| /* Retrieve Control (index 4) for specified PPSS level */ |
| acpigen_emit_byte(STORE_OP); |
| acpigen_emit_byte(DEREF_OP); |
| acpigen_emit_byte(INDEX_OP); |
| acpigen_emit_byte(DEREF_OP); |
| acpigen_emit_byte(INDEX_OP); |
| acpigen_emit_namestring("PPSS"); |
| acpigen_write_to_integer(ARG0_OP, ZERO_OP); |
| acpigen_emit_byte(ZERO_OP); /* 3rd arg to Index */ |
| acpigen_write_integer(4); /* Index */ |
| acpigen_emit_byte(ZERO_OP); /* 3rd arg to Index */ |
| acpigen_emit_byte(LOCAL0_OP); |
| |
| /* Pass Control value to EC to limit charging */ |
| acpigen_emit_namestring(acpi_device_path_join(ec, "CHGS")); |
| acpigen_emit_byte(LOCAL0_OP); |
| acpigen_pop_len(); /* Method */ |
| } |
| |
| static void write_fan_fst(const struct device *ec, int participant) |
| { |
| /* TFST is a package that is used to store data from FAND */ |
| acpigen_write_name("TFST"); |
| acpigen_write_package(3); |
| acpigen_write_integer(0); /* Revision */ |
| acpigen_write_integer(0); /* Control */ |
| acpigen_write_integer(0); /* Speed */ |
| acpigen_pop_len(); /* Package */ |
| |
| /* _FST */ |
| acpigen_write_method_serialized("_FST", 0); |
| acpigen_write_store(); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "FAND")); |
| acpigen_emit_byte(INDEX_OP); |
| acpigen_emit_namestring("TFST"); |
| acpigen_write_integer(1); |
| acpigen_emit_byte(ZERO_OP); /* 3rd arg to Index */ |
| acpigen_write_store(); |
| acpigen_emit_namestring(acpi_device_path_join(ec, fan_num_namestring_of(participant))); |
| acpigen_emit_byte(INDEX_OP); |
| acpigen_emit_namestring("TFST"); |
| acpigen_write_integer(2); |
| acpigen_emit_byte(ZERO_OP); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_namestring("TFST"); |
| acpigen_pop_len(); /* Method _FST */ |
| } |
| |
| static void write_fan_fsl(const struct device *ec) |
| { |
| /* _FSL */ |
| acpigen_write_method_serialized("_FSL", 1); |
| acpigen_write_store(); |
| acpigen_emit_byte(ARG0_OP); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "FAND")); |
| acpigen_pop_len(); /* Method _FSL */ |
| } |
| |
| /* |
| * Emit code to execute if the policy is enabled after this function is called, and also |
| * remember to manually add a acpigen_pop_len() afterwards! |
| */ |
| static void write_is_policy_enabled(bool enabled) |
| { |
| /* |
| * Local0 = SizeOf (IDSP) |
| * Local1 = 0 |
| * Local2 = 0 |
| * |
| * While (Local1 < Local0) { |
| * If (IDSP[Local1] == Arg0 && Arg1 == enabled) { |
| * Local2 = 1 |
| * } |
| * Local1++ |
| * } |
| * |
| * If (Local2 == 1) { |
| * .......... |
| */ |
| |
| /* Local0 = SizeOf (IDSP) */ |
| acpigen_write_store(); |
| acpigen_emit_byte(SIZEOF_OP); |
| acpigen_emit_namestring("IDSP"); |
| acpigen_emit_byte(LOCAL0_OP); |
| |
| /* Local1 = 0 (index variable) */ |
| acpigen_write_store(); |
| acpigen_write_zero(); |
| acpigen_emit_byte(LOCAL1_OP); |
| |
| /* Local2 = 0 (out variable, 1=found, 0=not found) */ |
| acpigen_write_store(); |
| acpigen_write_zero(); |
| acpigen_emit_byte(LOCAL2_OP); |
| |
| /* |
| * While (Local1 < Local0) { |
| */ |
| acpigen_emit_byte(WHILE_OP); |
| acpigen_write_len_f(); |
| acpigen_emit_byte(LLESS_OP); |
| acpigen_emit_byte(LOCAL1_OP); |
| acpigen_emit_byte(LOCAL0_OP); |
| |
| /* If (IDSP[Local1] == Arg0 && Arg1 == 1) { */ |
| acpigen_write_if(); |
| acpigen_emit_byte(LAND_OP); |
| acpigen_emit_byte(LEQUAL_OP); |
| acpigen_emit_byte(DEREF_OP); |
| acpigen_emit_byte(INDEX_OP); |
| acpigen_emit_namestring("IDSP"); |
| acpigen_emit_byte(LOCAL1_OP); |
| acpigen_emit_byte(ZERO_OP); /* 3rd arg of index - unused */ |
| acpigen_emit_byte(ARG0_OP); /* end lequal */ |
| acpigen_emit_byte(LEQUAL_OP); |
| acpigen_emit_byte(ARG1_OP); |
| acpigen_write_integer(enabled ? 1 : 0); |
| |
| /* { Local2 = 1 } */ |
| acpigen_write_store(); |
| acpigen_write_one(); |
| acpigen_emit_byte(LOCAL2_OP); |
| acpigen_pop_len(); /* If */ |
| |
| /* |
| * Local1++ |
| * } # End of While |
| */ |
| acpigen_emit_byte(INCREMENT_OP); |
| acpigen_emit_byte(LOCAL1_OP); |
| acpigen_pop_len(); /* While */ |
| |
| /* |
| * If (Local2 == 1) |
| */ |
| acpigen_write_if(); |
| acpigen_emit_byte(LEQUAL_OP); |
| acpigen_emit_byte(LOCAL2_OP); |
| acpigen_write_one(); |
| |
| /* caller must insert acpigen_pop_len() ! */ |
| } |
| |
| static void write_dptf_OSC(const struct device *ec) |
| { |
| char name[16]; |
| int i; |
| |
| /* |
| * Arg0: Buffer containing UUID |
| * Arg1: "Integer containing Revision ID of buffer format", but Linux passes whether |
| * it is enabling (1) or disabling (0) the policy in Arg1. |
| * Arg2: Integer containing count of entries in Arg3 |
| * Arg3: Buffer containing list of DWORD capabilities |
| * Return: Buffer containing list of DWORD capabilities |
| */ |
| acpigen_write_method_serialized("_OSC", 4); |
| |
| /* |
| * If the Passive Policy is enabled: |
| * 1) Disable temperature sensor trip points in the EC (replaces TINI) |
| * 2) Disable the charge limit in the EC (replaces TCHG.INIT) |
| */ |
| write_is_policy_enabled(true); |
| for (i = 0; i < DPTF_MAX_TSR; ++i) { |
| snprintf(name, sizeof(name), "^TSR%1d.PATD", i); |
| acpigen_emit_namestring(name); |
| } |
| |
| acpigen_emit_namestring(acpi_device_path_join(ec, "CHGD")); |
| acpigen_pop_len(); /* If (from write_is_policy_enabled) */ |
| |
| /* If the Active Policy is disabled, disable DPTF fan control in the EC */ |
| write_is_policy_enabled(false); |
| acpigen_write_store(); |
| acpigen_write_integer(EC_FAN_DUTY_AUTO); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "FAND")); |
| acpigen_pop_len(); /* If (from write_is_policy_enabled) */ |
| |
| acpigen_write_return_op(ARG3_OP); |
| acpigen_pop_len(); /* Method _OSC */ |
| } |
| |
| static void write_dppm_methods(const struct device *ec) |
| { |
| enum dptf_participant p; |
| char name[16]; |
| int i; |
| |
| acpigen_write_scope("\\_SB.DPTF"); |
| write_dptf_OSC(ec); |
| |
| /* TEVT */ |
| if (CONFIG(EC_SUPPORTS_DPTF_TEVT)) { |
| acpigen_write_method("TEVT", 1); |
| |
| /* Local0 = ToInteger(Arg0) */ |
| acpigen_write_to_integer(ARG0_OP, LOCAL0_OP); |
| for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_4; ++p, ++i) { |
| snprintf(name, sizeof(name), "^TSR%1d", i); |
| acpigen_write_if_lequal_op_int(LOCAL0_OP, i); |
| acpigen_notify(name, THERMAL_EVENT); |
| acpigen_pop_len(); /* If */ |
| } |
| |
| acpigen_pop_len(); /* Method */ |
| } |
| |
| /* TPET */ |
| acpigen_write_method("TPET", 0); |
| for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_4; ++p, ++i) { |
| snprintf(name, sizeof(name), "^TSR%1d", i); |
| acpigen_notify(name, TRIP_POINTS_CHANGED_EVENT); |
| } |
| |
| acpigen_pop_len(); /* Method */ |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| static void write_charger_methods(const struct device *ec) |
| { |
| dptf_write_scope(DPTF_CHARGER); |
| write_charger_PPPC(ec); |
| write_charger_SPPC(ec); |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| static void write_fan_methods(const struct device *ec, int participant) |
| { |
| dptf_write_scope(participant); |
| write_fan_fsl(ec); |
| write_fan_fst(ec, participant); |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| static void write_thermal_methods(const struct device *ec, enum dptf_participant participant, |
| int tsr_index) |
| { |
| dptf_write_scope(participant); |
| |
| /* |
| * GTSH - Amount of hysteresis inherent in temperature reading (2 degrees, in units of |
| * 1/10th degree K) |
| */ |
| acpigen_write_name_integer("GTSH", 20); |
| |
| /* _TMP - read temperature from EC */ |
| acpigen_write_method_serialized("_TMP", 0); |
| acpigen_emit_byte(RETURN_OP); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "TSRD")); |
| acpigen_write_integer(tsr_index); |
| acpigen_pop_len(); /* Method _TMP */ |
| |
| /* PATC - Aux trip point count */ |
| acpigen_write_name_integer("PATC", 2); |
| |
| /* PAT0 - Set Aux trip point 0 */ |
| acpigen_write_method_serialized("PAT0", 1); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "PAT0")); |
| acpigen_write_integer(tsr_index); |
| acpigen_emit_byte(ARG0_OP); |
| acpigen_pop_len(); /* Method PAT0 */ |
| |
| /* PAT1 - Set Aux trip point 1 */ |
| acpigen_write_method_serialized("PAT1", 1); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "PAT1")); |
| acpigen_write_integer(tsr_index); |
| acpigen_emit_byte(ARG0_OP); |
| acpigen_pop_len(); /* Method PAT0 */ |
| |
| /* PATD - Disable Aux trip point */ |
| acpigen_write_method_serialized("PATD", 0); |
| acpigen_emit_namestring(acpi_device_path_join(ec, "PATD")); |
| acpigen_write_integer(tsr_index); |
| acpigen_pop_len(); /* Method PAT0 */ |
| |
| acpigen_pop_len(); /* Scope */ |
| } |
| |
| void ec_fill_dptf_helpers(const struct device *ec, const struct device *fan_dev) |
| { |
| enum dptf_participant p; |
| int i; |
| struct ec_google_chromeec_config *config = fan_dev->chip_info; |
| |
| write_dppm_methods(ec); |
| write_charger_methods(ec); |
| |
| if (config->ec_multifan_support) { |
| for (p = DPTF_FAN; p <= DPTF_FAN_2; ++p) |
| write_fan_methods(ec, p); |
| } else |
| write_fan_methods(ec, DPTF_FAN); |
| |
| for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_4; ++p, ++i) |
| write_thermal_methods(ec, p, i); |
| } |