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| -rw-r--r-- | include/linux/mfd/cros_ec_commands.h | 1369 |
1 files changed, 1369 insertions, 0 deletions
diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h new file mode 100644 index 000000000000..86fd06953bcd --- /dev/null +++ b/include/linux/mfd/cros_ec_commands.h @@ -0,0 +1,1369 @@ +/* + * Host communication command constants for ChromeOS EC + * + * Copyright (C) 2012 Google, Inc + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * The ChromeOS EC multi function device is used to mux all the requests + * to the EC device for its multiple features: keyboard controller, + * battery charging and regulator control, firmware update. + * + * NOTE: This file is copied verbatim from the ChromeOS EC Open Source + * project in an attempt to make future updates easy to make. + */ + +#ifndef __CROS_EC_COMMANDS_H +#define __CROS_EC_COMMANDS_H + +/* + * Protocol overview + * + * request: CMD [ P0 P1 P2 ... Pn S ] + * response: ERR [ P0 P1 P2 ... Pn S ] + * + * where the bytes are defined as follow : + * - CMD is the command code. (defined by EC_CMD_ constants) + * - ERR is the error code. (defined by EC_RES_ constants) + * - Px is the optional payload. + * it is not sent if the error code is not success. + * (defined by ec_params_ and ec_response_ structures) + * - S is the checksum which is the sum of all payload bytes. + * + * On LPC, CMD and ERR are sent/received at EC_LPC_ADDR_KERNEL|USER_CMD + * and the payloads are sent/received at EC_LPC_ADDR_KERNEL|USER_PARAM. + * On I2C, all bytes are sent serially in the same message. + */ + +/* Current version of this protocol */ +#define EC_PROTO_VERSION 0x00000002 + +/* Command version mask */ +#define EC_VER_MASK(version) (1UL << (version)) + +/* I/O addresses for ACPI commands */ +#define EC_LPC_ADDR_ACPI_DATA 0x62 +#define EC_LPC_ADDR_ACPI_CMD 0x66 + +/* I/O addresses for host command */ +#define EC_LPC_ADDR_HOST_DATA 0x200 +#define EC_LPC_ADDR_HOST_CMD 0x204 + +/* I/O addresses for host command args and params */ +#define EC_LPC_ADDR_HOST_ARGS 0x800 +#define EC_LPC_ADDR_HOST_PARAM 0x804 +#define EC_HOST_PARAM_SIZE 0x0fc /* Size of param area in bytes */ + +/* I/O addresses for host command params, old interface */ +#define EC_LPC_ADDR_OLD_PARAM 0x880 +#define EC_OLD_PARAM_SIZE 0x080 /* Size of param area in bytes */ + +/* EC command register bit functions */ +#define EC_LPC_CMDR_DATA (1 << 0) /* Data ready for host to read */ +#define EC_LPC_CMDR_PENDING (1 << 1) /* Write pending to EC */ +#define EC_LPC_CMDR_BUSY (1 << 2) /* EC is busy processing a command */ +#define EC_LPC_CMDR_CMD (1 << 3) /* Last host write was a command */ +#define EC_LPC_CMDR_ACPI_BRST (1 << 4) /* Burst mode (not used) */ +#define EC_LPC_CMDR_SCI (1 << 5) /* SCI event is pending */ +#define EC_LPC_CMDR_SMI (1 << 6) /* SMI event is pending */ + +#define EC_LPC_ADDR_MEMMAP 0x900 +#define EC_MEMMAP_SIZE 255 /* ACPI IO buffer max is 255 bytes */ +#define EC_MEMMAP_TEXT_MAX 8 /* Size of a string in the memory map */ + +/* The offset address of each type of data in mapped memory. */ +#define EC_MEMMAP_TEMP_SENSOR 0x00 /* Temp sensors */ +#define EC_MEMMAP_FAN 0x10 /* Fan speeds */ +#define EC_MEMMAP_TEMP_SENSOR_B 0x18 /* Temp sensors (second set) */ +#define EC_MEMMAP_ID 0x20 /* 'E' 'C' */ +#define EC_MEMMAP_ID_VERSION 0x22 /* Version of data in 0x20 - 0x2f */ +#define EC_MEMMAP_THERMAL_VERSION 0x23 /* Version of data in 0x00 - 0x1f */ +#define EC_MEMMAP_BATTERY_VERSION 0x24 /* Version of data in 0x40 - 0x7f */ +#define EC_MEMMAP_SWITCHES_VERSION 0x25 /* Version of data in 0x30 - 0x33 */ +#define EC_MEMMAP_EVENTS_VERSION 0x26 /* Version of data in 0x34 - 0x3f */ +#define EC_MEMMAP_HOST_CMD_FLAGS 0x27 /* Host command interface flags */ +#define EC_MEMMAP_SWITCHES 0x30 +#define EC_MEMMAP_HOST_EVENTS 0x34 +#define EC_MEMMAP_BATT_VOLT 0x40 /* Battery Present Voltage */ +#define EC_MEMMAP_BATT_RATE 0x44 /* Battery Present Rate */ +#define EC_MEMMAP_BATT_CAP 0x48 /* Battery Remaining Capacity */ +#define EC_MEMMAP_BATT_FLAG 0x4c /* Battery State, defined below */ +#define EC_MEMMAP_BATT_DCAP 0x50 /* Battery Design Capacity */ +#define EC_MEMMAP_BATT_DVLT 0x54 /* Battery Design Voltage */ +#define EC_MEMMAP_BATT_LFCC 0x58 /* Battery Last Full Charge Capacity */ +#define EC_MEMMAP_BATT_CCNT 0x5c /* Battery Cycle Count */ +#define EC_MEMMAP_BATT_MFGR 0x60 /* Battery Manufacturer String */ +#define EC_MEMMAP_BATT_MODEL 0x68 /* Battery Model Number String */ +#define EC_MEMMAP_BATT_SERIAL 0x70 /* Battery Serial Number String */ +#define EC_MEMMAP_BATT_TYPE 0x78 /* Battery Type String */ + +/* Number of temp sensors at EC_MEMMAP_TEMP_SENSOR */ +#define EC_TEMP_SENSOR_ENTRIES 16 +/* + * Number of temp sensors at EC_MEMMAP_TEMP_SENSOR_B. + * + * Valid only if EC_MEMMAP_THERMAL_VERSION returns >= 2. + */ +#define EC_TEMP_SENSOR_B_ENTRIES 8 +#define EC_TEMP_SENSOR_NOT_PRESENT 0xff +#define EC_TEMP_SENSOR_ERROR 0xfe +#define EC_TEMP_SENSOR_NOT_POWERED 0xfd +#define EC_TEMP_SENSOR_NOT_CALIBRATED 0xfc +/* + * The offset of temperature value stored in mapped memory. This allows + * reporting a temperature range of 200K to 454K = -73C to 181C. + */ +#define EC_TEMP_SENSOR_OFFSET 200 + +#define EC_FAN_SPEED_ENTRIES 4 /* Number of fans at EC_MEMMAP_FAN */ +#define EC_FAN_SPEED_NOT_PRESENT 0xffff /* Entry not present */ +#define EC_FAN_SPEED_STALLED 0xfffe /* Fan stalled */ + +/* Battery bit flags at EC_MEMMAP_BATT_FLAG. */ +#define EC_BATT_FLAG_AC_PRESENT 0x01 +#define EC_BATT_FLAG_BATT_PRESENT 0x02 +#define EC_BATT_FLAG_DISCHARGING 0x04 +#define EC_BATT_FLAG_CHARGING 0x08 +#define EC_BATT_FLAG_LEVEL_CRITICAL 0x10 + +/* Switch flags at EC_MEMMAP_SWITCHES */ +#define EC_SWITCH_LID_OPEN 0x01 +#define EC_SWITCH_POWER_BUTTON_PRESSED 0x02 +#define EC_SWITCH_WRITE_PROTECT_DISABLED 0x04 +/* Recovery requested via keyboard */ +#define EC_SWITCH_KEYBOARD_RECOVERY 0x08 +/* Recovery requested via dedicated signal (from servo board) */ +#define EC_SWITCH_DEDICATED_RECOVERY 0x10 +/* Was fake developer mode switch; now unused. Remove in next refactor. */ +#define EC_SWITCH_IGNORE0 0x20 + +/* Host command interface flags */ +/* Host command interface supports LPC args (LPC interface only) */ +#define EC_HOST_CMD_FLAG_LPC_ARGS_SUPPORTED 0x01 + +/* Wireless switch flags */ +#define EC_WIRELESS_SWITCH_WLAN 0x01 +#define EC_WIRELESS_SWITCH_BLUETOOTH 0x02 + +/* + * This header file is used in coreboot both in C and ACPI code. The ACPI code + * is pre-processed to handle constants but the ASL compiler is unable to + * handle actual C code so keep it separate. + */ +#ifndef __ACPI__ + +/* LPC command status byte masks */ +/* EC has written a byte in the data register and host hasn't read it yet */ +#define EC_LPC_STATUS_TO_HOST 0x01 +/* Host has written a command/data byte and the EC hasn't read it yet */ +#define EC_LPC_STATUS_FROM_HOST 0x02 +/* EC is processing a command */ +#define EC_LPC_STATUS_PROCESSING 0x04 +/* Last write to EC was a command, not data */ +#define EC_LPC_STATUS_LAST_CMD 0x08 +/* EC is in burst mode. Unsupported by Chrome EC, so this bit is never set */ +#define EC_LPC_STATUS_BURST_MODE 0x10 +/* SCI event is pending (requesting SCI query) */ +#define EC_LPC_STATUS_SCI_PENDING 0x20 +/* SMI event is pending (requesting SMI query) */ +#define EC_LPC_STATUS_SMI_PENDING 0x40 +/* (reserved) */ +#define EC_LPC_STATUS_RESERVED 0x80 + +/* + * EC is busy. This covers both the EC processing a command, and the host has + * written a new command but the EC hasn't picked it up yet. + */ +#define EC_LPC_STATUS_BUSY_MASK \ + (EC_LPC_STATUS_FROM_HOST | EC_LPC_STATUS_PROCESSING) + +/* Host command response codes */ +enum ec_status { + EC_RES_SUCCESS = 0, + EC_RES_INVALID_COMMAND = 1, + EC_RES_ERROR = 2, + EC_RES_INVALID_PARAM = 3, + EC_RES_ACCESS_DENIED = 4, + EC_RES_INVALID_RESPONSE = 5, + EC_RES_INVALID_VERSION = 6, + EC_RES_INVALID_CHECKSUM = 7, + EC_RES_IN_PROGRESS = 8, /* Accepted, command in progress */ + EC_RES_UNAVAILABLE = 9, /* No response available */ + EC_RES_TIMEOUT = 10, /* We got a timeout */ + EC_RES_OVERFLOW = 11, /* Table / data overflow */ +}; + +/* + * Host event codes. Note these are 1-based, not 0-based, because ACPI query + * EC command uses code 0 to mean "no event pending". We explicitly specify + * each value in the enum listing so they won't change if we delete/insert an + * item or rearrange the list (it needs to be stable across platforms, not + * just within a single compiled instance). + */ +enum host_event_code { + EC_HOST_EVENT_LID_CLOSED = 1, + EC_HOST_EVENT_LID_OPEN = 2, + EC_HOST_EVENT_POWER_BUTTON = 3, + EC_HOST_EVENT_AC_CONNECTED = 4, + EC_HOST_EVENT_AC_DISCONNECTED = 5, + EC_HOST_EVENT_BATTERY_LOW = 6, + EC_HOST_EVENT_BATTERY_CRITICAL = 7, + EC_HOST_EVENT_BATTERY = 8, + EC_HOST_EVENT_THERMAL_THRESHOLD = 9, + EC_HOST_EVENT_THERMAL_OVERLOAD = 10, + EC_HOST_EVENT_THERMAL = 11, + EC_HOST_EVENT_USB_CHARGER = 12, + EC_HOST_EVENT_KEY_PRESSED = 13, + /* + * EC has finished initializing the host interface. The host can check + * for this event following sending a EC_CMD_REBOOT_EC command to + * determine when the EC is ready to accept subsequent commands. + */ + EC_HOST_EVENT_INTERFACE_READY = 14, + /* Keyboard recovery combo has been pressed */ + EC_HOST_EVENT_KEYBOARD_RECOVERY = 15, + + /* Shutdown due to thermal overload */ + EC_HOST_EVENT_THERMAL_SHUTDOWN = 16, + /* Shutdown due to battery level too low */ + EC_HOST_EVENT_BATTERY_SHUTDOWN = 17, + + /* + * The high bit of the event mask is not used as a host event code. If + * it reads back as set, then the entire event mask should be + * considered invalid by the host. This can happen when reading the + * raw event status via EC_MEMMAP_HOST_EVENTS but the LPC interface is + * not initialized on the EC, or improperly configured on the host. + */ + EC_HOST_EVENT_INVALID = 32 +}; +/* Host event mask */ +#define EC_HOST_EVENT_MASK(event_code) (1UL << ((event_code) - 1)) + +/* Arguments at EC_LPC_ADDR_HOST_ARGS */ +struct ec_lpc_host_args { + uint8_t flags; + uint8_t command_version; + uint8_t data_size; + /* + * Checksum; sum of command + flags + command_version + data_size + + * all params/response data bytes. + */ + uint8_t checksum; +} __packed; + +/* Flags for ec_lpc_host_args.flags */ +/* + * Args are from host. Data area at EC_LPC_ADDR_HOST_PARAM contains command + * params. + * + * If EC gets a command and this flag is not set, this is an old-style command. + * Command version is 0 and params from host are at EC_LPC_ADDR_OLD_PARAM with + * unknown length. EC must respond with an old-style response (that is, + * withouth setting EC_HOST_ARGS_FLAG_TO_HOST). + */ +#define EC_HOST_ARGS_FLAG_FROM_HOST 0x01 +/* + * Args are from EC. Data area at EC_LPC_ADDR_HOST_PARAM contains response. + * + * If EC responds to a command and this flag is not set, this is an old-style + * response. Command version is 0 and response data from EC is at + * EC_LPC_ADDR_OLD_PARAM with unknown length. + */ +#define EC_HOST_ARGS_FLAG_TO_HOST 0x02 + +/* + * Notes on commands: + * + * Each command is an 8-byte command value. Commands which take params or + * return response data specify structs for that data. If no struct is + * specified, the command does not input or output data, respectively. + * Parameter/response length is implicit in the structs. Some underlying + * communication protocols (I2C, SPI) may add length or checksum headers, but + * those are implementation-dependent and not defined here. + */ + +/*****************************************************************************/ +/* General / test commands */ + +/* + * Get protocol version, used to deal with non-backward compatible protocol + * changes. + */ +#define EC_CMD_PROTO_VERSION 0x00 + +struct ec_response_proto_version { + uint32_t version; +} __packed; + +/* + * Hello. This is a simple command to test the EC is responsive to + * commands. + */ +#define EC_CMD_HELLO 0x01 + +struct ec_params_hello { + uint32_t in_data; /* Pass anything here */ +} __packed; + +struct ec_response_hello { + uint32_t out_data; /* Output will be in_data + 0x01020304 */ +} __packed; + +/* Get version number */ +#define EC_CMD_GET_VERSION 0x02 + +enum ec_current_image { + EC_IMAGE_UNKNOWN = 0, + EC_IMAGE_RO, + EC_IMAGE_RW +}; + +struct ec_response_get_version { + /* Null-terminated version strings for RO, RW */ + char version_string_ro[32]; + char version_string_rw[32]; + char reserved[32]; /* Was previously RW-B string */ + uint32_t current_image; /* One of ec_current_image */ +} __packed; + +/* Read test */ +#define EC_CMD_READ_TEST 0x03 + +struct ec_params_read_test { + uint32_t offset; /* Starting value for read buffer */ + uint32_t size; /* Size to read in bytes */ +} __packed; + +struct ec_response_read_test { + uint32_t data[32]; +} __packed; + +/* + * Get build information + * + * Response is null-terminated string. + */ +#define EC_CMD_GET_BUILD_INFO 0x04 + +/* Get chip info */ +#define EC_CMD_GET_CHIP_INFO 0x05 + +struct ec_response_get_chip_info { + /* Null-terminated strings */ + char vendor[32]; + char name[32]; + char revision[32]; /* Mask version */ +} __packed; + +/* Get board HW version */ +#define EC_CMD_GET_BOARD_VERSION 0x06 + +struct ec_response_board_version { + uint16_t board_version; /* A monotonously incrementing number. */ +} __packed; + +/* + * Read memory-mapped data. + * + * This is an alternate interface to memory-mapped data for bus protocols + * which don't support direct-mapped memory - I2C, SPI, etc. + * + * Response is params.size bytes of data. + */ +#define EC_CMD_READ_MEMMAP 0x07 + +struct ec_params_read_memmap { + uint8_t offset; /* Offset in memmap (EC_MEMMAP_*) */ + uint8_t size; /* Size to read in bytes */ +} __packed; + +/* Read versions supported for a command */ +#define EC_CMD_GET_CMD_VERSIONS 0x08 + +struct ec_params_get_cmd_versions { + uint8_t cmd; /* Command to check */ +} __packed; + +struct ec_response_get_cmd_versions { + /* + * Mask of supported versions; use EC_VER_MASK() to compare with a + * desired version. + */ + uint32_t version_mask; +} __packed; + +/* + * Check EC communcations status (busy). This is needed on i2c/spi but not + * on lpc since it has its own out-of-band busy indicator. + * + * lpc must read the status from the command register. Attempting this on + * lpc will overwrite the args/parameter space and corrupt its data. + */ +#define EC_CMD_GET_COMMS_STATUS 0x09 + +/* Avoid using ec_status which is for return values */ +enum ec_comms_status { + EC_COMMS_STATUS_PROCESSING = 1 << 0, /* Processing cmd */ +}; + +struct ec_response_get_comms_status { + uint32_t flags; /* Mask of enum ec_comms_status */ +} __packed; + + +/*****************************************************************************/ +/* Flash commands */ + +/* Get flash info */ +#define EC_CMD_FLASH_INFO 0x10 + +struct ec_response_flash_info { + /* Usable flash size, in bytes */ + uint32_t flash_size; + /* + * Write block size. Write offset and size must be a multiple + * of this. + */ + uint32_t write_block_size; + /* + * Erase block size. Erase offset and size must be a multiple + * of this. + */ + uint32_t erase_block_size; + /* + * Protection block size. Protection offset and size must be a + * multiple of this. + */ + uint32_t protect_block_size; +} __packed; + +/* + * Read flash + * + * Response is params.size bytes of data. + */ +#define EC_CMD_FLASH_READ 0x11 + +struct ec_params_flash_read { + uint32_t offset; /* Byte offset to read */ + uint32_t size; /* Size to read in bytes */ +} __packed; + +/* Write flash */ +#define EC_CMD_FLASH_WRITE 0x12 + +struct ec_params_flash_write { + uint32_t offset; /* Byte offset to write */ + uint32_t size; /* Size to write in bytes */ + /* + * Data to write. Could really use EC_PARAM_SIZE - 8, but tidiest to + * use a power of 2 so writes stay aligned. + */ + uint8_t data[64]; +} __packed; + +/* Erase flash */ +#define EC_CMD_FLASH_ERASE 0x13 + +struct ec_params_flash_erase { + uint32_t offset; /* Byte offset to erase */ + uint32_t size; /* Size to erase in bytes */ +} __packed; + +/* + * Get/set flash protection. + * + * If mask!=0, sets/clear the requested bits of flags. Depending on the + * firmware write protect GPIO, not all flags will take effect immediately; + * some flags require a subsequent hard reset to take effect. Check the + * returned flags bits to see what actually happened. + * + * If mask=0, simply returns the current flags state. + */ +#define EC_CMD_FLASH_PROTECT 0x15 +#define EC_VER_FLASH_PROTECT 1 /* Command version 1 */ + +/* Flags for flash protection */ +/* RO flash code protected when the EC boots */ +#define EC_FLASH_PROTECT_RO_AT_BOOT (1 << 0) +/* + * RO flash code protected now. If this bit is set, at-boot status cannot + * be changed. + */ +#define EC_FLASH_PROTECT_RO_NOW (1 << 1) +/* Entire flash code protected now, until reboot. */ +#define EC_FLASH_PROTECT_ALL_NOW (1 << 2) +/* Flash write protect GPIO is asserted now */ +#define EC_FLASH_PROTECT_GPIO_ASSERTED (1 << 3) +/* Error - at least one bank of flash is stuck locked, and cannot be unlocked */ +#define EC_FLASH_PROTECT_ERROR_STUCK (1 << 4) +/* + * Error - flash protection is in inconsistent state. At least one bank of + * flash which should be protected is not protected. Usually fixed by + * re-requesting the desired flags, or by a hard reset if that fails. + */ +#define EC_FLASH_PROTECT_ERROR_INCONSISTENT (1 << 5) +/* Entile flash code protected when the EC boots */ +#define EC_FLASH_PROTECT_ALL_AT_BOOT (1 << 6) + +struct ec_params_flash_protect { + uint32_t mask; /* Bits in flags to apply */ + uint32_t flags; /* New flags to apply */ +} __packed; + +struct ec_response_flash_protect { + /* Current value of flash protect flags */ + uint32_t flags; + /* + * Flags which are valid on this platform. This allows the caller + * to distinguish between flags which aren't set vs. flags which can't + * be set on this platform. + */ + uint32_t valid_flags; + /* Flags which can be changed given the current protection state */ + uint32_t writable_flags; +} __packed; + +/* + * Note: commands 0x14 - 0x19 version 0 were old commands to get/set flash + * write protect. These commands may be reused with version > 0. + */ + +/* Get the region offset/size */ +#define EC_CMD_FLASH_REGION_INFO 0x16 +#define EC_VER_FLASH_REGION_INFO 1 + +enum ec_flash_region { + /* Region which holds read-only EC image */ + EC_FLASH_REGION_RO, + /* Region which holds rewritable EC image */ + EC_FLASH_REGION_RW, + /* + * Region which should be write-protected in the factory (a superset of + * EC_FLASH_REGION_RO) + */ + EC_FLASH_REGION_WP_RO, +}; + +struct ec_params_flash_region_info { + uint32_t region; /* enum ec_flash_region */ +} __packed; + +struct ec_response_flash_region_info { + uint32_t offset; + uint32_t size; +} __packed; + +/* Read/write VbNvContext */ +#define EC_CMD_VBNV_CONTEXT 0x17 +#define EC_VER_VBNV_CONTEXT 1 +#define EC_VBNV_BLOCK_SIZE 16 + +enum ec_vbnvcontext_op { + EC_VBNV_CONTEXT_OP_READ, + EC_VBNV_CONTEXT_OP_WRITE, +}; + +struct ec_params_vbnvcontext { + uint32_t op; + uint8_t block[EC_VBNV_BLOCK_SIZE]; +} __packed; + +struct ec_response_vbnvcontext { + uint8_t block[EC_VBNV_BLOCK_SIZE]; +} __packed; + +/*****************************************************************************/ +/* PWM commands */ + +/* Get fan target RPM */ +#define EC_CMD_PWM_GET_FAN_TARGET_RPM 0x20 + +struct ec_response_pwm_get_fan_rpm { + uint32_t rpm; +} __packed; + +/* Set target fan RPM */ +#define EC_CMD_PWM_SET_FAN_TARGET_RPM 0x21 + +struct ec_params_pwm_set_fan_target_rpm { + uint32_t rpm; +} __packed; + +/* Get keyboard backlight */ +#define EC_CMD_PWM_GET_KEYBOARD_BACKLIGHT 0x22 + +struct ec_response_pwm_get_keyboard_backlight { + uint8_t percent; + uint8_t enabled; +} __packed; + +/* Set keyboard backlight */ +#define EC_CMD_PWM_SET_KEYBOARD_BACKLIGHT 0x23 + +struct ec_params_pwm_set_keyboard_backlight { + uint8_t percent; +} __packed; + +/* Set target fan PWM duty cycle */ +#define EC_CMD_PWM_SET_FAN_DUTY 0x24 + +struct ec_params_pwm_set_fan_duty { + uint32_t percent; +} __packed; + +/*****************************************************************************/ +/* + * Lightbar commands. This looks worse than it is. Since we only use one HOST + * command to say "talk to the lightbar", we put the "and tell it to do X" part + * into a subcommand. We'll make separate structs for subcommands with + * different input args, so that we know how much to expect. + */ +#define EC_CMD_LIGHTBAR_CMD 0x28 + +struct rgb_s { + uint8_t r, g, b; +}; + +#define LB_BATTERY_LEVELS 4 +/* List of tweakable parameters. NOTE: It's __packed so it can be sent in a + * host command, but the alignment is the same regardless. Keep it that way. + */ +struct lightbar_params { + /* Timing */ + int google_ramp_up; + int google_ramp_down; + int s3s0_ramp_up; + int s0_tick_delay[2]; /* AC=0/1 */ + int s0a_tick_delay[2]; /* AC=0/1 */ + int s0s3_ramp_down; + int s3_sleep_for; + int s3_ramp_up; + int s3_ramp_down; + + /* Oscillation */ + uint8_t new_s0; + uint8_t osc_min[2]; /* AC=0/1 */ + uint8_t osc_max[2]; /* AC=0/1 */ + uint8_t w_ofs[2]; /* AC=0/1 */ + + /* Brightness limits based on the backlight and AC. */ + uint8_t bright_bl_off_fixed[2]; /* AC=0/1 */ + uint8_t bright_bl_on_min[2]; /* AC=0/1 */ + uint8_t bright_bl_on_max[2]; /* AC=0/1 */ + + /* Battery level thresholds */ + uint8_t battery_threshold[LB_BATTERY_LEVELS - 1]; + + /* Map [AC][battery_level] to color index */ + uint8_t s0_idx[2][LB_BATTERY_LEVELS]; /* AP is running */ + uint8_t s3_idx[2][LB_BATTERY_LEVELS]; /* AP is sleeping */ + + /* Color palette */ + struct rgb_s color[8]; /* 0-3 are Google colors */ +} __packed; + +struct ec_params_lightbar { + uint8_t cmd; /* Command (see enum lightbar_command) */ + union { + struct { + /* no args */ + } dump, off, on, init, get_seq, get_params; + + struct num { + uint8_t num; + } brightness, seq, demo; + + struct reg { + uint8_t ctrl, reg, value; + } reg; + + struct rgb { + uint8_t led, red, green, blue; + } rgb; + + struct lightbar_params set_params; + }; +} __packed; + +struct ec_response_lightbar { + union { + struct dump { + struct { + uint8_t reg; + uint8_t ic0; + uint8_t ic1; + } vals[23]; + } dump; + + struct get_seq { + uint8_t num; + } get_seq; + + struct lightbar_params get_params; + + struct { + /* no return params */ + } off, on, init, brightness, seq, reg, rgb, demo, set_params; + }; +} __packed; + +/* Lightbar commands */ +enum lightbar_command { + LIGHTBAR_CMD_DUMP = 0, + LIGHTBAR_CMD_OFF = 1, + LIGHTBAR_CMD_ON = 2, + LIGHTBAR_CMD_INIT = 3, + LIGHTBAR_CMD_BRIGHTNESS = 4, + LIGHTBAR_CMD_SEQ = 5, + LIGHTBAR_CMD_REG = 6, + LIGHTBAR_CMD_RGB = 7, + LIGHTBAR_CMD_GET_SEQ = 8, + LIGHTBAR_CMD_DEMO = 9, + LIGHTBAR_CMD_GET_PARAMS = 10, + LIGHTBAR_CMD_SET_PARAMS = 11, + LIGHTBAR_NUM_CMDS +}; + +/*****************************************************************************/ +/* Verified boot commands */ + +/* + * Note: command code 0x29 version 0 was VBOOT_CMD in Link EVT; it may be + * reused for other purposes with version > 0. + */ + +/* Verified boot hash command */ +#define EC_CMD_VBOOT_HASH 0x2A + +struct ec_params_vboot_hash { + uint8_t cmd; /* enum ec_vboot_hash_cmd */ + uint8_t hash_type; /* enum ec_vboot_hash_type */ + uint8_t nonce_size; /* Nonce size; may be 0 */ + uint8_t reserved0; /* Reserved; set 0 */ + uint32_t offset; /* Offset in flash to hash */ + uint32_t size; /* Number of bytes to hash */ + uint8_t nonce_data[64]; /* Nonce data; ignored if nonce_size=0 */ +} __packed; + +struct ec_response_vboot_hash { + uint8_t status; /* enum ec_vboot_hash_status */ + uint8_t hash_type; /* enum ec_vboot_hash_type */ + uint8_t digest_size; /* Size of hash digest in bytes */ + uint8_t reserved0; /* Ignore; will be 0 */ + uint32_t offset; /* Offset in flash which was hashed */ + uint32_t size; /* Number of bytes hashed */ + uint8_t hash_digest[64]; /* Hash digest data */ +} __packed; + +enum ec_vboot_hash_cmd { + EC_VBOOT_HASH_GET = 0, /* Get current hash status */ + EC_VBOOT_HASH_ABORT = 1, /* Abort calculating current hash */ + EC_VBOOT_HASH_START = 2, /* Start computing a new hash */ + EC_VBOOT_HASH_RECALC = 3, /* Synchronously compute a new hash */ +}; + +enum ec_vboot_hash_type { + EC_VBOOT_HASH_TYPE_SHA256 = 0, /* SHA-256 */ +}; + +enum ec_vboot_hash_status { + EC_VBOOT_HASH_STATUS_NONE = 0, /* No hash (not started, or aborted) */ + EC_VBOOT_HASH_STATUS_DONE = 1, /* Finished computing a hash */ + EC_VBOOT_HASH_STATUS_BUSY = 2, /* Busy computing a hash */ +}; + +/* + * Special values for offset for EC_VBOOT_HASH_START and EC_VBOOT_HASH_RECALC. + * If one of these is specified, the EC will automatically update offset and + * size to the correct values for the specified image (RO or RW). + */ +#define EC_VBOOT_HASH_OFFSET_RO 0xfffffffe +#define EC_VBOOT_HASH_OFFSET_RW 0xfffffffd + +/*****************************************************************************/ +/* USB charging control commands */ + +/* Set USB port charging mode */ +#define EC_CMD_USB_CHARGE_SET_MODE 0x30 + +struct ec_params_usb_charge_set_mode { + uint8_t usb_port_id; + uint8_t mode; +} __packed; + +/*****************************************************************************/ +/* Persistent storage for host */ + +/* Maximum bytes that can be read/written in a single command */ +#define EC_PSTORE_SIZE_MAX 64 + +/* Get persistent storage info */ +#define EC_CMD_PSTORE_INFO 0x40 + +struct ec_response_pstore_info { + /* Persistent storage size, in bytes */ + uint32_t pstore_size; + /* Access size; read/write offset and size must be a multiple of this */ + uint32_t access_size; +} __packed; + +/* + * Read persistent storage + * + * Response is params.size bytes of data. + */ +#define EC_CMD_PSTORE_READ 0x41 + +struct ec_params_pstore_read { + uint32_t offset; /* Byte offset to read */ + uint32_t size; /* Size to read in bytes */ +} __packed; + +/* Write persistent storage */ +#define EC_CMD_PSTORE_WRITE 0x42 + +struct ec_params_pstore_write { + uint32_t offset; /* Byte offset to write */ + uint32_t size; /* Size to write in bytes */ + uint8_t data[EC_PSTORE_SIZE_MAX]; +} __packed; + +/*****************************************************************************/ +/* Real-time clock */ + +/* RTC params and response structures */ +struct ec_params_rtc { + uint32_t time; +} __packed; + +struct ec_response_rtc { + uint32_t time; +} __packed; + +/* These use ec_response_rtc */ +#define EC_CMD_RTC_GET_VALUE 0x44 +#define EC_CMD_RTC_GET_ALARM 0x45 + +/* These all use ec_params_rtc */ +#define EC_CMD_RTC_SET_VALUE 0x46 +#define EC_CMD_RTC_SET_ALARM 0x47 + +/*****************************************************************************/ +/* Port80 log access */ + +/* Get last port80 code from previous boot */ +#define EC_CMD_PORT80_LAST_BOOT 0x48 + +struct ec_response_port80_last_boot { + uint16_t code; +} __packed; + +/*****************************************************************************/ +/* Thermal engine commands */ + +/* Set thershold value */ +#define EC_CMD_THERMAL_SET_THRESHOLD 0x50 + +struct ec_params_thermal_set_threshold { + uint8_t sensor_type; + uint8_t threshold_id; + uint16_t value; +} __packed; + +/* Get threshold value */ +#define EC_CMD_THERMAL_GET_THRESHOLD 0x51 + +struct ec_params_thermal_get_threshold { + uint8_t sensor_type; + uint8_t threshold_id; +} __packed; + +struct ec_response_thermal_get_threshold { + uint16_t value; +} __packed; + +/* Toggle automatic fan control */ +#define EC_CMD_THERMAL_AUTO_FAN_CTRL 0x52 + +/* Get TMP006 calibration data */ +#define EC_CMD_TMP006_GET_CALIBRATION 0x53 + +struct ec_params_tmp006_get_calibration { + uint8_t index; +} __packed; + +struct ec_response_tmp006_get_calibration { + float s0; + float b0; + float b1; + float b2; +} __packed; + +/* Set TMP006 calibration data */ +#define EC_CMD_TMP006_SET_CALIBRATION 0x54 + +struct ec_params_tmp006_set_calibration { + uint8_t index; + uint8_t reserved[3]; /* Reserved; set 0 */ + float s0; + float b0; + float b1; + float b2; +} __packed; + +/*****************************************************************************/ +/* MKBP - Matrix KeyBoard Protocol */ + +/* + * Read key state + * + * Returns raw data for keyboard cols; see ec_response_mkbp_info.cols for + * expected response size. + */ +#define EC_CMD_MKBP_STATE 0x60 + +/* Provide information about the matrix : number of rows and columns */ +#define EC_CMD_MKBP_INFO 0x61 + +struct ec_response_mkbp_info { + uint32_t rows; + uint32_t cols; + uint8_t switches; +} __packed; + +/* Simulate key press */ +#define EC_CMD_MKBP_SIMULATE_KEY 0x62 + +struct ec_params_mkbp_simulate_key { + uint8_t col; + uint8_t row; + uint8_t pressed; +} __packed; + +/* Configure keyboard scanning */ +#define EC_CMD_MKBP_SET_CONFIG 0x64 +#define EC_CMD_MKBP_GET_CONFIG 0x65 + +/* flags */ +enum mkbp_config_flags { + EC_MKBP_FLAGS_ENABLE = 1, /* Enable keyboard scanning */ +}; + +enum mkbp_config_valid { + EC_MKBP_VALID_SCAN_PERIOD = 1 << 0, + EC_MKBP_VALID_POLL_TIMEOUT = 1 << 1, + EC_MKBP_VALID_MIN_POST_SCAN_DELAY = 1 << 3, + EC_MKBP_VALID_OUTPUT_SETTLE = 1 << 4, + EC_MKBP_VALID_DEBOUNCE_DOWN = 1 << 5, + EC_MKBP_VALID_DEBOUNCE_UP = 1 << 6, + EC_MKBP_VALID_FIFO_MAX_DEPTH = 1 << 7, +}; + +/* Configuration for our key scanning algorithm */ +struct ec_mkbp_config { + uint32_t valid_mask; /* valid fields */ + uint8_t flags; /* some flags (enum mkbp_config_flags) */ + uint8_t valid_flags; /* which flags are valid */ + uint16_t scan_period_us; /* period between start of scans */ + /* revert to interrupt mode after no activity for this long */ + uint32_t poll_timeout_us; + /* + * minimum post-scan relax time. Once we finish a scan we check + * the time until we are due to start the next one. If this time is + * shorter this field, we use this instead. + */ + uint16_t min_post_scan_delay_us; + /* delay between setting up output and waiting for it to settle */ + uint16_t output_settle_us; + uint16_t debounce_down_us; /* time for debounce on key down */ + uint16_t debounce_up_us; /* time for debounce on key up */ + /* maximum depth to allow for fifo (0 = no keyscan output) */ + uint8_t fifo_max_depth; +} __packed; + +struct ec_params_mkbp_set_config { + struct ec_mkbp_config config; +} __packed; + +struct ec_response_mkbp_get_config { + struct ec_mkbp_config config; +} __packed; + +/* Run the key scan emulation */ +#define EC_CMD_KEYSCAN_SEQ_CTRL 0x66 + +enum ec_keyscan_seq_cmd { + EC_KEYSCAN_SEQ_STATUS = 0, /* Get status information */ + EC_KEYSCAN_SEQ_CLEAR = 1, /* Clear sequence */ + EC_KEYSCAN_SEQ_ADD = 2, /* Add item to sequence */ + EC_KEYSCAN_SEQ_START = 3, /* Start running sequence */ + EC_KEYSCAN_SEQ_COLLECT = 4, /* Collect sequence summary data */ +}; + +enum ec_collect_flags { + /* + * Indicates this scan was processed by the EC. Due to timing, some + * scans may be skipped. + */ + EC_KEYSCAN_SEQ_FLAG_DONE = 1 << 0, +}; + +struct ec_collect_item { + uint8_t flags; /* some flags (enum ec_collect_flags) */ +}; + +struct ec_params_keyscan_seq_ctrl { + uint8_t cmd; /* Command to send (enum ec_keyscan_seq_cmd) */ + union { + struct { + uint8_t active; /* still active */ + uint8_t num_items; /* number of items */ + /* Current item being presented */ + uint8_t cur_item; + } status; + struct { + /* + * Absolute time for this scan, measured from the + * start of the sequence. + */ + uint32_t time_us; + uint8_t scan[0]; /* keyscan data */ + } add; + struct { + uint8_t start_item; /* First item to return */ + uint8_t num_items; /* Number of items to return */ + } collect; + }; +} __packed; + +struct ec_result_keyscan_seq_ctrl { + union { + struct { + uint8_t num_items; /* Number of items */ + /* Data for each item */ + struct ec_collect_item item[0]; + } collect; + }; +} __packed; + +/*****************************************************************************/ +/* Temperature sensor commands */ + +/* Read temperature sensor info */ +#define EC_CMD_TEMP_SENSOR_GET_INFO 0x70 + +struct ec_params_temp_sensor_get_info { + uint8_t id; +} __packed; + +struct ec_response_temp_sensor_get_info { + char sensor_name[32]; + uint8_t sensor_type; +} __packed; + +/*****************************************************************************/ + +/* + * Note: host commands 0x80 - 0x87 are reserved to avoid conflict with ACPI + * commands accidentally sent to the wrong interface. See the ACPI section + * below. + */ + +/*****************************************************************************/ +/* Host event commands */ + +/* + * Host event mask params and response structures, shared by all of the host + * event commands below. + */ +struct ec_params_host_event_mask { + uint32_t mask; +} __packed; + +struct ec_response_host_event_mask { + uint32_t mask; +} __packed; + +/* These all use ec_response_host_event_mask */ +#define EC_CMD_HOST_EVENT_GET_B 0x87 +#define EC_CMD_HOST_EVENT_GET_SMI_MASK 0x88 +#define EC_CMD_HOST_EVENT_GET_SCI_MASK 0x89 +#define EC_CMD_HOST_EVENT_GET_WAKE_MASK 0x8d + +/* These all use ec_params_host_event_mask */ +#define EC_CMD_HOST_EVENT_SET_SMI_MASK 0x8a +#define EC_CMD_HOST_EVENT_SET_SCI_MASK 0x8b +#define EC_CMD_HOST_EVENT_CLEAR 0x8c +#define EC_CMD_HOST_EVENT_SET_WAKE_MASK 0x8e +#define EC_CMD_HOST_EVENT_CLEAR_B 0x8f + +/*****************************************************************************/ +/* Switch commands */ + +/* Enable/disable LCD backlight */ +#define EC_CMD_SWITCH_ENABLE_BKLIGHT 0x90 + +struct ec_params_switch_enable_backlight { + uint8_t enabled; +} __packed; + +/* Enable/disable WLAN/Bluetooth */ +#define EC_CMD_SWITCH_ENABLE_WIRELESS 0x91 + +struct ec_params_switch_enable_wireless { + uint8_t enabled; +} __packed; + +/*****************************************************************************/ +/* GPIO commands. Only available on EC if write protect has been disabled. */ + +/* Set GPIO output value */ +#define EC_CMD_GPIO_SET 0x92 + +struct ec_params_gpio_set { + char name[32]; + uint8_t val; +} __packed; + +/* Get GPIO value */ +#define EC_CMD_GPIO_GET 0x93 + +struct ec_params_gpio_get { + char name[32]; +} __packed; +struct ec_response_gpio_get { + uint8_t val; +} __packed; + +/*****************************************************************************/ +/* I2C commands. Only available when flash write protect is unlocked. */ + +/* Read I2C bus */ +#define EC_CMD_I2C_READ 0x94 + +struct ec_params_i2c_read { + uint16_t addr; + uint8_t read_size; /* Either 8 or 16. */ + uint8_t port; + uint8_t offset; +} __packed; +struct ec_response_i2c_read { + uint16_t data; +} __packed; + +/* Write I2C bus */ +#define EC_CMD_I2C_WRITE 0x95 + +struct ec_params_i2c_write { + uint16_t data; + uint16_t addr; + uint8_t write_size; /* Either 8 or 16. */ + uint8_t port; + uint8_t offset; +} __packed; + +/*****************************************************************************/ +/* Charge state commands. Only available when flash write protect unlocked. */ + +/* Force charge state machine to stop in idle mode */ +#define EC_CMD_CHARGE_FORCE_IDLE 0x96 + +struct ec_params_force_idle { + uint8_t enabled; +} __packed; + +/*****************************************************************************/ +/* Console commands. Only available when flash write protect is unlocked. */ + +/* Snapshot console output buffer for use by EC_CMD_CONSOLE_READ. */ +#define EC_CMD_CONSOLE_SNAPSHOT 0x97 + +/* + * Read next chunk of data from saved snapshot. + * + * Response is null-terminated string. Empty string, if there is no more + * remaining output. + */ +#define EC_CMD_CONSOLE_READ 0x98 + +/*****************************************************************************/ + +/* + * Cut off battery power output if the battery supports. + * + * For unsupported battery, just don't implement this command and lets EC + * return EC_RES_INVALID_COMMAND. + */ +#define EC_CMD_BATTERY_CUT_OFF 0x99 + +/*****************************************************************************/ +/* Temporary debug commands. TODO: remove this crosbug.com/p/13849 */ + +/* + * Dump charge state machine context. + * + * Response is a binary dump of charge state machine context. + */ +#define EC_CMD_CHARGE_DUMP 0xa0 + +/* + * Set maximum battery charging current. + */ +#define EC_CMD_CHARGE_CURRENT_LIMIT 0xa1 + +struct ec_params_current_limit { + uint32_t limit; +} __packed; + +/*****************************************************************************/ +/* System commands */ + +/* + * TODO: this is a confusing name, since it doesn't necessarily reboot the EC. + * Rename to "set image" or something similar. + */ +#define EC_CMD_REBOOT_EC 0xd2 + +/* Command */ +enum ec_reboot_cmd { + EC_REBOOT_CANCEL = 0, /* Cancel a pending reboot */ + EC_REBOOT_JUMP_RO = 1, /* Jump to RO without rebooting */ + EC_REBOOT_JUMP_RW = 2, /* Jump to RW without rebooting */ + /* (command 3 was jump to RW-B) */ + EC_REBOOT_COLD = 4, /* Cold-reboot */ + EC_REBOOT_DISABLE_JUMP = 5, /* Disable jump until next reboot */ + EC_REBOOT_HIBERNATE = 6 /* Hibernate EC */ +}; + +/* Flags for ec_params_reboot_ec.reboot_flags */ +#define EC_REBOOT_FLAG_RESERVED0 (1 << 0) /* Was recovery request */ +#define EC_REBOOT_FLAG_ON_AP_SHUTDOWN (1 << 1) /* Reboot after AP shutdown */ + +struct ec_params_reboot_ec { + uint8_t cmd; /* enum ec_reboot_cmd */ + uint8_t flags; /* See EC_REBOOT_FLAG_* */ +} __packed; + +/* + * Get information on last EC panic. + * + * Returns variable-length platform-dependent panic information. See panic.h + * for details. + */ +#define EC_CMD_GET_PANIC_INFO 0xd3 + +/*****************************************************************************/ +/* + * ACPI commands + * + * These are valid ONLY on the ACPI command/data port. + */ + +/* + * ACPI Read Embedded Controller + * + * This reads from ACPI memory space on the EC (EC_ACPI_MEM_*). + * + * Use the following sequence: + * + * - Write EC_CMD_ACPI_READ to EC_LPC_ADDR_ACPI_CMD + * - Wait for EC_LPC_CMDR_PENDING bit to clear + * - Write address to EC_LPC_ADDR_ACPI_DATA + * - Wait for EC_LPC_CMDR_DATA bit to set + * - Read value from EC_LPC_ADDR_ACPI_DATA + */ +#define EC_CMD_ACPI_READ 0x80 + +/* + * ACPI Write Embedded Controller + * + * This reads from ACPI memory space on the EC (EC_ACPI_MEM_*). + * + * Use the following sequence: + * + * - Write EC_CMD_ACPI_WRITE to EC_LPC_ADDR_ACPI_CMD + * - Wait for EC_LPC_CMDR_PENDING bit to clear + * - Write address to EC_LPC_ADDR_ACPI_DATA + * - Wait for EC_LPC_CMDR_PENDING bit to clear + * - Write value to EC_LPC_ADDR_ACPI_DATA + */ +#define EC_CMD_ACPI_WRITE 0x81 + +/* + * ACPI Query Embedded Controller + * + * This clears the lowest-order bit in the currently pending host events, and + * sets the result code to the 1-based index of the bit (event 0x00000001 = 1, + * event 0x80000000 = 32), or 0 if no event was pending. + */ +#define EC_CMD_ACPI_QUERY_EVENT 0x84 + +/* Valid addresses in ACPI memory space, for read/write commands */ +/* Memory space version; set to EC_ACPI_MEM_VERSION_CURRENT */ +#define EC_ACPI_MEM_VERSION 0x00 +/* + * Test location; writing value here updates test compliment byte to (0xff - + * value). + */ +#define EC_ACPI_MEM_TEST 0x01 +/* Test compliment; writes here are ignored. */ +#define EC_ACPI_MEM_TEST_COMPLIMENT 0x02 +/* Keyboard backlight brightness percent (0 - 100) */ +#define EC_ACPI_MEM_KEYBOARD_BACKLIGHT 0x03 + +/* Current version of ACPI memory address space */ +#define EC_ACPI_MEM_VERSION_CURRENT 1 + + +/*****************************************************************************/ +/* + * Special commands + * + * These do not follow the normal rules for commands. See each command for + * details. + */ + +/* + * Reboot NOW + * + * This command will work even when the EC LPC interface is busy, because the + * reboot command is processed at interrupt level. Note that when the EC + * reboots, the host will reboot too, so there is no response to this command. + * + * Use EC_CMD_REBOOT_EC to reboot the EC more politely. + */ +#define EC_CMD_REBOOT 0xd1 /* Think "die" */ + +/* + * Resend last response (not supported on LPC). + * + * Returns EC_RES_UNAVAILABLE if there is no response available - for example, + * there was no previous command, or the previous command's response was too + * big to save. + */ +#define EC_CMD_RESEND_RESPONSE 0xdb + +/* + * This header byte on a command indicate version 0. Any header byte less + * than this means that we are talking to an old EC which doesn't support + * versioning. In that case, we assume version 0. + * + * Header bytes greater than this indicate a later version. For example, + * EC_CMD_VERSION0 + 1 means we are using version 1. + * + * The old EC interface must not use commands 0dc or higher. + */ +#define EC_CMD_VERSION0 0xdc + +#endif /* !__ACPI__ */ + +#endif /* __CROS_EC_COMMANDS_H */ |