/*
 * 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

/*
 * Current version of this protocol
 *
 * TODO(crosbug.com/p/11223): This is effectively useless; protocol is
 * determined in other ways.  Remove this once the kernel code no longer
 * depends on it.
 */
#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 */
/* Protocol version 2 */
#define EC_LPC_ADDR_HOST_ARGS    0x800  /* And 0x801, 0x802, 0x803 */
#define EC_LPC_ADDR_HOST_PARAM   0x804  /* For version 2 params; size is
                                         * EC_PROTO2_MAX_PARAM_SIZE */
/* Protocol version 3 */
#define EC_LPC_ADDR_HOST_PACKET  0x800  /* Offset of version 3 packet */
#define EC_LPC_HOST_PACKET_SIZE  0x100  /* Max size of version 3 packet */

/* The actual block is 0x800-0x8ff, but some BIOSes think it's 0x880-0x8ff
 * and they tell the kernel that so we have to think of it as two parts. */
#define EC_HOST_CMD_REGION0    0x800
#define EC_HOST_CMD_REGION1    0x880
#define EC_HOST_CMD_REGION_SIZE 0x80

/* 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 0x00 - 0x0f */
#define EC_MEMMAP_FAN              0x10 /* Fan speeds 0x10 - 0x17 */
#define EC_MEMMAP_TEMP_SENSOR_B    0x18 /* More temp sensors 0x18 - 0x1f */
#define EC_MEMMAP_ID               0x20 /* 0x20 == 'E', 0x21 == '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 cmd interface flags (8 bits) */
/* Unused 0x28 - 0x2f */
#define EC_MEMMAP_SWITCHES         0x30 /* 8 bits */
/* Unused 0x31 - 0x33 */
#define EC_MEMMAP_HOST_EVENTS      0x34 /* 32 bits */
/* Reserve 0x38 - 0x3f for additional host event-related stuff */
/* Battery values are all 32 bits */
#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 */
/* Strings are all 8 bytes (EC_MEMMAP_TEXT_MAX) */
#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 */
#define EC_MEMMAP_ALS              0x80 /* ALS readings in lux (2 X 16 bits) */
/* Unused 0x84 - 0x8f */
#define EC_MEMMAP_ACC_STATUS       0x90 /* Accelerometer status (8 bits )*/
/* Unused 0x91 */
#define EC_MEMMAP_ACC_DATA         0x92 /* Accelerometer data 0x92 - 0x9f */
#define EC_MEMMAP_GYRO_DATA        0xa0 /* Gyroscope data 0xa0 - 0xa5 */
/* Unused 0xa6 - 0xfe (remember, 0xff is NOT part of the memmap region) */


/* Define the format of the accelerometer mapped memory status byte. */
#define EC_MEMMAP_ACC_STATUS_SAMPLE_ID_MASK  0x0f
#define EC_MEMMAP_ACC_STATUS_BUSY_BIT        (1 << 4)
#define EC_MEMMAP_ACC_STATUS_PRESENCE_BIT    (1 << 7)

/* 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

/* Special values for mapped temperature sensors */
#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

/*
 * Number of ALS readings at EC_MEMMAP_ALS
 */
#define EC_ALS_ENTRIES             2

/*
 * The default value a temperature sensor will return when it is present but
 * has not been read this boot.  This is a reasonable number to avoid
 * triggering alarms on the host.
 */
#define EC_TEMP_SENSOR_DEFAULT     (296 - EC_TEMP_SENSOR_OFFSET)

#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
/* Was recovery requested via keyboard; now unused. */
#define EC_SWITCH_IGNORE1                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
/* Host command interface supports version 3 protocol */
#define EC_HOST_CMD_FLAG_VERSION_3   0x02

/* Wireless switch flags */
#define EC_WIRELESS_SWITCH_ALL       ~0x00  /* All flags */
#define EC_WIRELESS_SWITCH_WLAN       0x01  /* WLAN radio */
#define EC_WIRELESS_SWITCH_BLUETOOTH  0x02  /* Bluetooth radio */
#define EC_WIRELESS_SWITCH_WWAN       0x04  /* WWAN power */
#define EC_WIRELESS_SWITCH_WLAN_POWER 0x08  /* WLAN power */

/*
 * 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__

/*
 * Define __packed if someone hasn't beat us to it.  Linux kernel style
 * checking prefers __packed over __attribute__((packed)).
 */
#ifndef __packed
#define __packed __attribute__((packed))
#endif

/* 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 */
        EC_RES_INVALID_HEADER = 12,     /* Header contains invalid data */
        EC_RES_REQUEST_TRUNCATED = 13,  /* Didn't get the entire request */
        EC_RES_RESPONSE_TOO_BIG = 14    /* Response was too big to handle */
};

/*
 * 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,

        /* Suggest that the AP throttle itself */
        EC_HOST_EVENT_THROTTLE_START = 18,
        /* Suggest that the AP resume normal speed */
        EC_HOST_EVENT_THROTTLE_STOP = 19,

        /* Hang detect logic detected a hang and host event timeout expired */
        EC_HOST_EVENT_HANG_DETECT = 20,
        /* Hang detect logic detected a hang and warm rebooted the AP */
        EC_HOST_EVENT_HANG_REBOOT = 21,

        /*
         * 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

/*****************************************************************************/
/*
 * Byte codes returned by EC over SPI interface.
 *
 * These can be used by the AP to debug the EC interface, and to determine
 * when the EC is not in a state where it will ever get around to responding
 * to the AP.
 *
 * Example of sequence of bytes read from EC for a current good transfer:
 *   1. -                  - AP asserts chip select (CS#)
 *   2. EC_SPI_OLD_READY   - AP sends first byte(s) of request
 *   3. -                  - EC starts handling CS# interrupt
 *   4. EC_SPI_RECEIVING   - AP sends remaining byte(s) of request
 *   5. EC_SPI_PROCESSING  - EC starts processing request; AP is clocking in
 *                           bytes looking for EC_SPI_FRAME_START
 *   6. -                  - EC finishes processing and sets up response
 *   7. EC_SPI_FRAME_START - AP reads frame byte
 *   8. (response packet)  - AP reads response packet
 *   9. EC_SPI_PAST_END    - Any additional bytes read by AP
 *   10 -                  - AP deasserts chip select
 *   11 -                  - EC processes CS# interrupt and sets up DMA for
 *                           next request
 *
 * If the AP is waiting for EC_SPI_FRAME_START and sees any value other than
 * the following byte values:
 *   EC_SPI_OLD_READY
 *   EC_SPI_RX_READY
 *   EC_SPI_RECEIVING
 *   EC_SPI_PROCESSING
 *
 * Then the EC found an error in the request, or was not ready for the request
 * and lost data.  The AP should give up waiting for EC_SPI_FRAME_START,
 * because the EC is unable to tell when the AP is done sending its request.
 */

/*
 * Framing byte which precedes a response packet from the EC.  After sending a
 * request, the AP will clock in bytes until it sees the framing byte, then
 * clock in the response packet.
 */
#define EC_SPI_FRAME_START    0xec

/*
 * Padding bytes which are clocked out after the end of a response packet.
 */
#define EC_SPI_PAST_END       0xed

/*
 * EC is ready to receive, and has ignored the byte sent by the AP.  EC expects
 * that the AP will send a valid packet header (starting with
 * EC_COMMAND_PROTOCOL_3) in the next 32 bytes.
 */
#define EC_SPI_RX_READY       0xf8

/*
 * EC has started receiving the request from the AP, but hasn't started
 * processing it yet.
 */
#define EC_SPI_RECEIVING      0xf9

/* EC has received the entire request from the AP and is processing it. */
#define EC_SPI_PROCESSING     0xfa

/*
 * EC received bad data from the AP, such as a packet header with an invalid
 * length.  EC will ignore all data until chip select deasserts.
 */
#define EC_SPI_RX_BAD_DATA    0xfb

/*
 * EC received data from the AP before it was ready.  That is, the AP asserted
 * chip select and started clocking data before the EC was ready to receive it.
 * EC will ignore all data until chip select deasserts.
 */
#define EC_SPI_NOT_READY      0xfc

/*
 * EC was ready to receive a request from the AP.  EC has treated the byte sent
 * by the AP as part of a request packet, or (for old-style ECs) is processing
 * a fully received packet but is not ready to respond yet.
 */
#define EC_SPI_OLD_READY      0xfd

/*****************************************************************************/

/*
 * Protocol version 2 for I2C and SPI send a request this way:
 *
 *      0       EC_CMD_VERSION0 + (command version)
 *      1       Command number
 *      2       Length of params = N
 *      3..N+2  Params, if any
 *      N+3     8-bit checksum of bytes 0..N+2
 *
 * The corresponding response is:
 *
 *      0       Result code (EC_RES_*)
 *      1       Length of params = M
 *      2..M+1  Params, if any
 *      M+2     8-bit checksum of bytes 0..M+1
 */
#define EC_PROTO2_REQUEST_HEADER_BYTES 3
#define EC_PROTO2_REQUEST_TRAILER_BYTES 1
#define EC_PROTO2_REQUEST_OVERHEAD (EC_PROTO2_REQUEST_HEADER_BYTES +    \
                                    EC_PROTO2_REQUEST_TRAILER_BYTES)

#define EC_PROTO2_RESPONSE_HEADER_BYTES 2
#define EC_PROTO2_RESPONSE_TRAILER_BYTES 1
#define EC_PROTO2_RESPONSE_OVERHEAD (EC_PROTO2_RESPONSE_HEADER_BYTES +  \
                                     EC_PROTO2_RESPONSE_TRAILER_BYTES)

/* Parameter length was limited by the LPC interface */
#define EC_PROTO2_MAX_PARAM_SIZE 0xfc

/* Maximum request and response packet sizes for protocol version 2 */
#define EC_PROTO2_MAX_REQUEST_SIZE (EC_PROTO2_REQUEST_OVERHEAD +        \
                                    EC_PROTO2_MAX_PARAM_SIZE)
#define EC_PROTO2_MAX_RESPONSE_SIZE (EC_PROTO2_RESPONSE_OVERHEAD +      \
                                     EC_PROTO2_MAX_PARAM_SIZE)

/*****************************************************************************/

/*
 * Value written to legacy command port / prefix byte to indicate protocol
 * 3+ structs are being used.  Usage is bus-dependent.
 */
#define EC_COMMAND_PROTOCOL_3 0xda

#define EC_HOST_REQUEST_VERSION 3

/* Version 3 request from host */
struct ec_host_request {
        /* Struct version (=3)
         *
         * EC will return EC_RES_INVALID_HEADER if it receives a header with a
         * version it doesn't know how to parse.
         */
        uint8_t struct_version;

        /*
         * Checksum of request and data; sum of all bytes including checksum
         * should total to 0.
         */
        uint8_t checksum;

        /* Command code */
        uint16_t command;

        /* Command version */
        uint8_t command_version;

        /* Unused byte in current protocol version; set to 0 */
        uint8_t reserved;

        /* Length of data which follows this header */
        uint16_t data_len;
} __packed;

#define EC_HOST_RESPONSE_VERSION 3

/* Version 3 response from EC */
struct ec_host_response {
        /* Struct version (=3) */
        uint8_t struct_version;

        /*
         * Checksum of response and data; sum of all bytes including checksum
         * should total to 0.
         */
        uint8_t checksum;

        /* Result code (EC_RES_*) */
        uint16_t result;

        /* Length of data which follows this header */
        uint16_t data_len;

        /* Unused bytes in current protocol version; set to 0 */
        uint16_t reserved;
} __packed;

/*****************************************************************************/
/*
 * Notes on commands:
 *
 * Each command is an 16-bit 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;

/* Fake a variety of responses, purely for testing purposes. */
#define EC_CMD_TEST_PROTOCOL            0x0a

/* Tell the EC what to send back to us. */
struct ec_params_test_protocol {
        uint32_t ec_result;
        uint32_t ret_len;
        uint8_t buf[32];
} __packed;

/* Here it comes... */
struct ec_response_test_protocol {
        uint8_t buf[32];
} __packed;

/* Get prococol information */
#define EC_CMD_GET_PROTOCOL_INFO        0x0b

/* Flags for ec_response_get_protocol_info.flags */
/* EC_RES_IN_PROGRESS may be returned if a command is slow */
#define EC_PROTOCOL_INFO_IN_PROGRESS_SUPPORTED (1 << 0)

struct ec_response_get_protocol_info {
        /* Fields which exist if at least protocol version 3 supported */

        /* Bitmask of protocol versions supported (1 << n means version n)*/
        uint32_t protocol_versions;

        /* Maximum request packet size, in bytes */
        uint16_t max_request_packet_size;

        /* Maximum response packet size, in bytes */
        uint16_t max_response_packet_size;

        /* Flags; see EC_PROTOCOL_INFO_* */
        uint32_t flags;
} __packed;


/*****************************************************************************/
/* Get/Set miscellaneous values */

/* The upper byte of .flags tells what to do (nothing means "get") */
#define EC_GSV_SET        0x80000000

/* The lower three bytes of .flags identifies the parameter, if that has
   meaning for an individual command. */
#define EC_GSV_PARAM_MASK 0x00ffffff

struct ec_params_get_set_value {
        uint32_t flags;
        uint32_t value;
} __packed;

struct ec_response_get_set_value {
        uint32_t flags;
        uint32_t value;
} __packed;

/* More than one command can use these structs to get/set paramters. */
#define EC_CMD_GSV_PAUSE_IN_S5  0x0c

/*****************************************************************************/
/* List the features supported by the firmware */
#define EC_CMD_GET_FEATURES  0x0d

/* Supported features */
enum ec_feature_code {
        /*
         * This image contains a limited set of features. Another image
         * in RW partition may support more features.
         */
        EC_FEATURE_LIMITED = 0,
        /*
         * Commands for probing/reading/writing/erasing the flash in the
         * EC are present.
         */
        EC_FEATURE_FLASH = 1,
        /*
         * Can control the fan speed directly.
         */
        EC_FEATURE_PWM_FAN = 2,
        /*
         * Can control the intensity of the keyboard backlight.
         */
        EC_FEATURE_PWM_KEYB = 3,
        /*
         * Support Google lightbar, introduced on Pixel.
         */
        EC_FEATURE_LIGHTBAR = 4,
        /* Control of LEDs  */
        EC_FEATURE_LED = 5,
        /* Exposes an interface to control gyro and sensors.
         * The host goes through the EC to access these sensors.
         * In addition, the EC may provide composite sensors, like lid angle.
         */
        EC_FEATURE_MOTION_SENSE = 6,
        /* The keyboard is controlled by the EC */
        EC_FEATURE_KEYB = 7,
        /* The AP can use part of the EC flash as persistent storage. */
        EC_FEATURE_PSTORE = 8,
        /* The EC monitors BIOS port 80h, and can return POST codes. */
        EC_FEATURE_PORT80 = 9,
        /*
         * Thermal management: include TMP specific commands.
         * Higher level than direct fan control.
         */
        EC_FEATURE_THERMAL = 10,
        /* Can switch the screen backlight on/off */
        EC_FEATURE_BKLIGHT_SWITCH = 11,
        /* Can switch the wifi module on/off */
        EC_FEATURE_WIFI_SWITCH = 12,
        /* Monitor host events, through for example SMI or SCI */
        EC_FEATURE_HOST_EVENTS = 13,
        /* The EC exposes GPIO commands to control/monitor connected devices. */
        EC_FEATURE_GPIO = 14,
        /* The EC can send i2c messages to downstream devices. */
        EC_FEATURE_I2C = 15,
        /* Command to control charger are included */
        EC_FEATURE_CHARGER = 16,
        /* Simple battery support. */
        EC_FEATURE_BATTERY = 17,
        /*
         * Support Smart battery protocol
         * (Common Smart Battery System Interface Specification)
         */
        EC_FEATURE_SMART_BATTERY = 18,
        /* EC can dectect when the host hangs. */
        EC_FEATURE_HANG_DETECT = 19,
        /* Report power information, for pit only */
        EC_FEATURE_PMU = 20,
        /* Another Cros EC device is present downstream of this one */
        EC_FEATURE_SUB_MCU = 21,
        /* Support USB Power delivery (PD) commands */
        EC_FEATURE_USB_PD = 22,
        /* Control USB multiplexer, for audio through USB port for instance. */
        EC_FEATURE_USB_MUX = 23,
        /* Motion Sensor code has an internal software FIFO */
        EC_FEATURE_MOTION_SENSE_FIFO = 24,
};

#define EC_FEATURE_MASK_0(event_code) (1UL << (event_code % 32))
#define EC_FEATURE_MASK_1(event_code) (1UL << (event_code - 32))
struct ec_response_get_features {
        uint32_t flags[2];
} __packed;

/*****************************************************************************/
/* Flash commands */

/* Get flash info */
#define EC_CMD_FLASH_INFO 0x10

/* Version 0 returns these fields */
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;

/* Flags for version 1+ flash info command */
/* EC flash erases bits to 0 instead of 1 */
#define EC_FLASH_INFO_ERASE_TO_0 (1 << 0)

/*
 * Version 1 returns the same initial fields as version 0, with additional
 * fields following.
 *
 * gcc anonymous structs don't seem to get along with the __packed directive;
 * if they did we'd define the version 0 struct as a sub-struct of this one.
 */
struct ec_response_flash_info_1 {
        /* Version 0 fields; see above for description */
        uint32_t flash_size;
        uint32_t write_block_size;
        uint32_t erase_block_size;
        uint32_t protect_block_size;

        /* Version 1 adds these fields: */
        /*
         * Ideal write size in bytes.  Writes will be fastest if size is
         * exactly this and offset is a multiple of this.  For example, an EC
         * may have a write buffer which can do half-page operations if data is
         * aligned, and a slower word-at-a-time write mode.
         */
        uint32_t write_ideal_size;

        /* Flags; see EC_FLASH_INFO_* */
        uint32_t flags;
} __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
#define EC_VER_FLASH_WRITE 1

/* Version 0 of the flash command supported only 64 bytes of data */
#define EC_FLASH_WRITE_VER0_SIZE 64

struct ec_params_flash_write {
        uint32_t offset;   /* Byte offset to write */
        uint32_t size;     /* Size to write in bytes */
        /* Followed by data to write */
} __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 = 0,
        /* 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,
        /* Number of regions */
        EC_FLASH_REGION_COUNT,
};

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;

#define EC_CMD_PWM_SET_DUTY 0x25
/* 16 bit duty cycle, 0xffff = 100% */
#define EC_PWM_MAX_DUTY 0xffff

enum ec_pwm_type {
        /* All types, indexed by board-specific enum pwm_channel */
        EC_PWM_TYPE_GENERIC = 0,
        /* Keyboard backlight */
        EC_PWM_TYPE_KB_LIGHT,
        /* Display backlight */
        EC_PWM_TYPE_DISPLAY_LIGHT,
        EC_PWM_TYPE_COUNT,
};

struct ec_params_pwm_set_duty {
        uint16_t duty;     /* Duty cycle, EC_PWM_MAX_DUTY = 100% */
        uint8_t pwm_type;  /* ec_pwm_type */
        uint8_t index;     /* Type-specific index, or 0 if unique */
} __packed;

#define EC_CMD_PWM_GET_DUTY 0x26

struct ec_params_pwm_get_duty {
        uint8_t pwm_type;  /* ec_pwm_type */
        uint8_t index;     /* Type-specific index, or 0 if unique */
} __packed;

struct ec_response_pwm_get_duty {
        uint16_t duty;     /* Duty cycle, EC_PWM_MAX_DUTY = 100% */
} __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_v0 {
        /* Timing */
        int32_t google_ramp_up;
        int32_t google_ramp_down;
        int32_t s3s0_ramp_up;
        int32_t s0_tick_delay[2];               /* AC=0/1 */
        int32_t s0a_tick_delay[2];              /* AC=0/1 */
        int32_t s0s3_ramp_down;
        int32_t s3_sleep_for;
        int32_t s3_ramp_up;
        int32_t 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 lightbar_params_v1 {
        /* Timing */
        int32_t google_ramp_up;
        int32_t google_ramp_down;
        int32_t s3s0_ramp_up;
        int32_t s0_tick_delay[2];               /* AC=0/1 */
        int32_t s0a_tick_delay[2];              /* AC=0/1 */
        int32_t s0s3_ramp_down;
        int32_t s3_sleep_for;
        int32_t s3_ramp_up;
        int32_t s3_ramp_down;
        int32_t tap_tick_delay;
        int32_t tap_display_time;

        /* Tap-for-battery params */
        uint8_t tap_pct_red;
        uint8_t tap_pct_green;
        uint8_t tap_seg_min_on;
        uint8_t tap_seg_max_on;
        uint8_t tap_seg_osc;
        uint8_t tap_idx[3];

        /* Oscillation */
        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_v0, get_params_v1,
                        version, get_brightness, get_demo;

                struct {
                        uint8_t num;
                } set_brightness, seq, demo;

                struct {
                        uint8_t ctrl, reg, value;
                } reg;

                struct {
                        uint8_t led, red, green, blue;
                } set_rgb;

                struct {
                        uint8_t led;
                } get_rgb;

                struct lightbar_params_v0 set_params_v0;
                struct lightbar_params_v1 set_params_v1;
        };
} __packed;

struct ec_response_lightbar {
        union {
                struct {
                        struct {
                                uint8_t reg;
                                uint8_t ic0;
                                uint8_t ic1;
                        } vals[23];
                } dump;

                struct  {
                        uint8_t num;
                } get_seq, get_brightness, get_demo;

                struct lightbar_params_v0 get_params_v0;
                struct lightbar_params_v1 get_params_v1;

                struct {
                        uint32_t num;
                        uint32_t flags;
                } version;

                struct {
                        uint8_t red, green, blue;
                } get_rgb;

                struct {
                        /* no return params */
                } off, on, init, set_brightness, seq, reg, set_rgb,
                        demo, set_params_v0, set_params_v1;
        };
} __packed;

/* Lightbar commands */
enum lightbar_command {
        LIGHTBAR_CMD_DUMP = 0,
        LIGHTBAR_CMD_OFF = 1,
        LIGHTBAR_CMD_ON = 2,
        LIGHTBAR_CMD_INIT = 3,
        LIGHTBAR_CMD_SET_BRIGHTNESS = 4,
        LIGHTBAR_CMD_SEQ = 5,
        LIGHTBAR_CMD_REG = 6,
        LIGHTBAR_CMD_SET_RGB = 7,
        LIGHTBAR_CMD_GET_SEQ = 8,
        LIGHTBAR_CMD_DEMO = 9,
        LIGHTBAR_CMD_GET_PARAMS_V0 = 10,
        LIGHTBAR_CMD_SET_PARAMS_V0 = 11,
        LIGHTBAR_CMD_VERSION = 12,
        LIGHTBAR_CMD_GET_BRIGHTNESS = 13,
        LIGHTBAR_CMD_GET_RGB = 14,
        LIGHTBAR_CMD_GET_DEMO = 15,
        LIGHTBAR_CMD_GET_PARAMS_V1 = 16,
        LIGHTBAR_CMD_SET_PARAMS_V1 = 17,
        LIGHTBAR_NUM_CMDS
};

/*****************************************************************************/
/* LED control commands */

#define EC_CMD_LED_CONTROL 0x29

enum ec_led_id {
        /* LED to indicate battery state of charge */
        EC_LED_ID_BATTERY_LED = 0,
        /*
         * LED to indicate system power state (on or in suspend).
         * May be on power button or on C-panel.
         */
        EC_LED_ID_POWER_LED,
        /* LED on power adapter or its plug */
        EC_LED_ID_ADAPTER_LED,

        EC_LED_ID_COUNT
};

/* LED control flags */
#define EC_LED_FLAGS_QUERY (1 << 0) /* Query LED capability only */
#define EC_LED_FLAGS_AUTO  (1 << 1) /* Switch LED back to automatic control */

enum ec_led_colors {
        EC_LED_COLOR_RED = 0,
        EC_LED_COLOR_GREEN,
        EC_LED_COLOR_BLUE,
        EC_LED_COLOR_YELLOW,
        EC_LED_COLOR_WHITE,

        EC_LED_COLOR_COUNT
};

struct ec_params_led_control {
        uint8_t led_id;     /* Which LED to control */
        uint8_t flags;      /* Control flags */

        uint8_t brightness[EC_LED_COLOR_COUNT];
} __packed;

struct ec_response_led_control {
        /*
         * Available brightness value range.
         *
         * Range 0 means color channel not present.
         * Range 1 means on/off control.
         * Other values means the LED is control by PWM.
         */
        uint8_t brightness_range[EC_LED_COLOR_COUNT];
} __packed;

/*****************************************************************************/
/* 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

/*****************************************************************************/
/*
 * Motion sense commands. We'll make separate structs for sub-commands with
 * different input args, so that we know how much to expect.
 */
#define EC_CMD_MOTION_SENSE_CMD 0x2B

/* Motion sense commands */
enum motionsense_command {
        /*
         * Dump command returns all motion sensor data including motion sense
         * module flags and individual sensor flags.
         */
        MOTIONSENSE_CMD_DUMP = 0,

        /*
         * Info command returns data describing the details of a given sensor,
         * including enum motionsensor_type, enum motionsensor_location, and
         * enum motionsensor_chip.
         */
        MOTIONSENSE_CMD_INFO = 1,

        /*
         * EC Rate command is a setter/getter command for the EC sampling rate
         * of all motion sensors in milliseconds.
         */
        MOTIONSENSE_CMD_EC_RATE = 2,

        /*
         * Sensor ODR command is a setter/getter command for the output data
         * rate of a specific motion sensor in millihertz.
         */
        MOTIONSENSE_CMD_SENSOR_ODR = 3,

        /*
         * Sensor range command is a setter/getter command for the range of
         * a specified motion sensor in +/-G's or +/- deg/s.
         */
        MOTIONSENSE_CMD_SENSOR_RANGE = 4,

        /*
         * Setter/getter command for the keyboard wake angle. When the lid
         * angle is greater than this value, keyboard wake is disabled in S3,
         * and when the lid angle goes less than this value, keyboard wake is
         * enabled. Note, the lid angle measurement is an approximate,
         * un-calibrated value, hence the wake angle isn't exact.
         */
        MOTIONSENSE_CMD_KB_WAKE_ANGLE = 5,

        /*
         * Returns a single sensor data.
         */
        MOTIONSENSE_CMD_DATA = 6,

        /*
         * Perform low level calibration.. On sensors that support it, ask to
         * do offset calibration.
         */
        MOTIONSENSE_CMD_PERFORM_CALIB = 10,

        /*
         * Sensor Offset command is a setter/getter command for the offset used
         * for calibration. The offsets can be calculated by the host, or via
         * PERFORM_CALIB command.
         */
        MOTIONSENSE_CMD_SENSOR_OFFSET = 11,

        /* Number of motionsense sub-commands. */
        MOTIONSENSE_NUM_CMDS
};

enum motionsensor_id {
        EC_MOTION_SENSOR_ACCEL_BASE = 0,
        EC_MOTION_SENSOR_ACCEL_LID = 1,
        EC_MOTION_SENSOR_GYRO = 2,

        /*
         * Note, if more sensors are added and this count changes, the padding
         * in ec_response_motion_sense dump command must be modified.
         */
        EC_MOTION_SENSOR_COUNT = 3
};

/* List of motion sensor types. */
enum motionsensor_type {
        MOTIONSENSE_TYPE_ACCEL = 0,
        MOTIONSENSE_TYPE_GYRO = 1,
        MOTIONSENSE_TYPE_MAG = 2,
        MOTIONSENSE_TYPE_PROX = 3,
        MOTIONSENSE_TYPE_LIGHT = 4,
        MOTIONSENSE_TYPE_ACTIVITY = 5,
        MOTIONSENSE_TYPE_MAX
};

/* List of motion sensor locations. */
enum motionsensor_location {
        MOTIONSENSE_LOC_BASE = 0,
        MOTIONSENSE_LOC_LID = 1,
        MOTIONSENSE_LOC_MAX,
};

/* List of motion sensor chips. */
enum motionsensor_chip {
        MOTIONSENSE_CHIP_KXCJ9 = 0,
};

/* Module flag masks used for the dump sub-command. */
#define MOTIONSENSE_MODULE_FLAG_ACTIVE (1<<0)

/* Sensor flag masks used for the dump sub-command. */
#define MOTIONSENSE_SENSOR_FLAG_PRESENT (1<<0)

/*
 * Send this value for the data element to only perform a read. If you
 * send any other value, the EC will interpret it as data to set and will
 * return the actual value set.
 */
#define EC_MOTION_SENSE_NO_VALUE -1

#define EC_MOTION_SENSE_INVALID_CALIB_TEMP 0x8000

/* Set Calibration information */
#define MOTION_SENSE_SET_OFFSET 1

struct ec_response_motion_sensor_data {
        /* Flags for each sensor. */
        uint8_t flags;
        /* Sensor number the data comes from */
        uint8_t sensor_num;
        /* Each sensor is up to 3-axis. */
        union {
                int16_t             data[3];
                struct {
                        uint16_t    rsvd;
                        uint32_t    timestamp;
                } __packed;
                struct {
                        uint8_t     activity; /* motionsensor_activity */
                        uint8_t     state;
                        int16_t     add_info[2];
                };
        };
} __packed;

struct ec_params_motion_sense {
        uint8_t cmd;
        union {
                /* Used for MOTIONSENSE_CMD_DUMP. */
                struct {
                        /* no args */
                } dump;

                /*
                 * Used for MOTIONSENSE_CMD_EC_RATE and
                 * MOTIONSENSE_CMD_KB_WAKE_ANGLE.
                 */
                struct {
                        /* Data to set or EC_MOTION_SENSE_NO_VALUE to read. */
                        int16_t data;
                } ec_rate, kb_wake_angle;

                /* Used for MOTIONSENSE_CMD_SENSOR_OFFSET */
                struct {
                        uint8_t sensor_num;

                        /*
                         * bit 0: If set (MOTION_SENSE_SET_OFFSET), set
                         * the calibration information in the EC.
                         * If unset, just retrieve calibration information.
                         */
                        uint16_t flags;

                        /*
                         * Temperature at calibration, in units of 0.01 C
                         * 0x8000: invalid / unknown.
                         * 0x0: 0C
                         * 0x7fff: +327.67C
                         */
                        int16_t temp;

                        /*
                         * Offset for calibration.
                         * Unit:
                         * Accelerometer: 1/1024 g
                         * Gyro:          1/1024 deg/s
                         * Compass:       1/16 uT
                         */
                        int16_t offset[3];
                } __packed sensor_offset;

                /* Used for MOTIONSENSE_CMD_INFO. */
                struct {
                        uint8_t sensor_num;
                } info;

                /*
                 * Used for MOTIONSENSE_CMD_SENSOR_ODR and
                 * MOTIONSENSE_CMD_SENSOR_RANGE.
                 */
                struct {
                        /* Should be element of enum motionsensor_id. */
                        uint8_t sensor_num;

                        /* Rounding flag, true for round-up, false for down. */
                        uint8_t roundup;

                        uint16_t reserved;

                        /* Data to set or EC_MOTION_SENSE_NO_VALUE to read. */
                        int32_t data;
                } sensor_odr, sensor_range;
        };
} __packed;

struct ec_response_motion_sense {
        union {
                /* Used for MOTIONSENSE_CMD_DUMP. */
                struct {
                        /* Flags representing the motion sensor module. */
                        uint8_t module_flags;

                        /* Number of sensors managed directly by the EC. */
                        uint8_t sensor_count;

                        /*
                         * Sensor data is truncated if response_max is too small
                         * for holding all the data.
                         */
                        struct ec_response_motion_sensor_data sensor[0];
                } dump;

                /* Used for MOTIONSENSE_CMD_INFO. */
                struct {
                        /* Should be element of enum motionsensor_type. */
                        uint8_t type;

                        /* Should be element of enum motionsensor_location. */
                        uint8_t location;

                        /* Should be element of enum motionsensor_chip. */
                        uint8_t chip;
                } info;

                /* Used for MOTIONSENSE_CMD_DATA */
                struct ec_response_motion_sensor_data data;

                /*
                 * Used for MOTIONSENSE_CMD_EC_RATE, MOTIONSENSE_CMD_SENSOR_ODR,
                 * MOTIONSENSE_CMD_SENSOR_RANGE, and
                 * MOTIONSENSE_CMD_KB_WAKE_ANGLE.
                 */
                struct {
                        /* Current value of the parameter queried. */
                        int32_t ret;
                } ec_rate, sensor_odr, sensor_range, kb_wake_angle;

                /* Used for MOTIONSENSE_CMD_SENSOR_OFFSET */
                struct {
                        int16_t temp;
                        int16_t offset[3];
                } sensor_offset, perform_calib;
        };
} __packed;

/*****************************************************************************/
/* 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 */

/* Maximum entries that can be read/written in a single command */
#define EC_PORT80_SIZE_MAX 32

/* Get last port80 code from previous boot */
#define EC_CMD_PORT80_LAST_BOOT 0x48
#define EC_CMD_PORT80_READ 0x48

enum ec_port80_subcmd {
        EC_PORT80_GET_INFO = 0,
        EC_PORT80_READ_BUFFER,
};

struct ec_params_port80_read {
        uint16_t subcmd;
        union {
                struct {
                        uint32_t offset;
                        uint32_t num_entries;
                } read_buffer;
        };
} __packed;

struct ec_response_port80_read {
        union {
                struct {
                        uint32_t writes;
                        uint32_t history_size;
                        uint32_t last_boot;
                } get_info;
                struct {
                        uint16_t codes[EC_PORT80_SIZE_MAX];
                } data;
        };
} __packed;

struct ec_response_port80_last_boot {
        uint16_t code;
} __packed;

/*****************************************************************************/
/* Thermal engine commands. Note that there are two implementations. We'll
 * reuse the command number, but the data and behavior is incompatible.
 * Version 0 is what originally shipped on Link.
 * Version 1 separates the CPU thermal limits from the fan control.
 */

#define EC_CMD_THERMAL_SET_THRESHOLD 0x50
#define EC_CMD_THERMAL_GET_THRESHOLD 0x51

/* The version 0 structs are opaque. You have to know what they are for
 * the get/set commands to make any sense.
 */

/* Version 0 - set */
struct ec_params_thermal_set_threshold {
        uint8_t sensor_type;
        uint8_t threshold_id;
        uint16_t value;
} __packed;

/* Version 0 - get */
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;


/* The version 1 structs are visible. */
enum ec_temp_thresholds {
        EC_TEMP_THRESH_WARN = 0,
        EC_TEMP_THRESH_HIGH,
        EC_TEMP_THRESH_HALT,

        EC_TEMP_THRESH_COUNT
};

/* Thermal configuration for one temperature sensor. Temps are in degrees K.
 * Zero values will be silently ignored by the thermal task.
 */
struct ec_thermal_config {
        uint32_t temp_host[EC_TEMP_THRESH_COUNT]; /* levels of hotness */
        uint32_t temp_fan_off;          /* no active cooling needed */
        uint32_t temp_fan_max;          /* max active cooling needed */
} __packed;

/* Version 1 - get config for one sensor. */
struct ec_params_thermal_get_threshold_v1 {
        uint32_t sensor_num;
} __packed;
/* This returns a struct ec_thermal_config */

/* Version 1 - set config for one sensor.
 * Use read-modify-write for best results! */
struct ec_params_thermal_set_threshold_v1 {
        uint32_t sensor_num;
        struct ec_thermal_config cfg;
} __packed;
/* This returns no data */

/****************************************************************************/

/* 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;

/* Read raw TMP006 data */
#define EC_CMD_TMP006_GET_RAW 0x55

struct ec_params_tmp006_get_raw {
        uint8_t index;
} __packed;

struct ec_response_tmp006_get_raw {
        int32_t t;  /* In 1/100 K */
        int32_t v;  /* In nV */
};

/*****************************************************************************/
/* 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;

/*
 * Command for retrieving the next pending MKBP event from the EC device
 *
 * The device replies with UNAVAILABLE if there aren't any pending events.
 */
#define EC_CMD_GET_NEXT_EVENT 0x67

enum ec_mkbp_event {
        /* Keyboard matrix changed. The event data is the new matrix state. */
        EC_MKBP_EVENT_KEY_MATRIX = 0,

        /* New host event. The event data is 4 bytes of host event flags. */
        EC_MKBP_EVENT_HOST_EVENT = 1,

        /* New Sensor FIFO data. The event data is fifo_info structure. */
        EC_MKBP_EVENT_SENSOR_FIFO = 2,

        /* Number of MKBP events */
        EC_MKBP_EVENT_COUNT,
};

union ec_response_get_next_data {
        uint8_t   key_matrix[13];

        /* Unaligned */
        uint32_t  host_event;
} __packed;

struct ec_response_get_next_event {
        uint8_t event_type;
        /* Followed by event data if any */
        union ec_response_get_next_data data;

} __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
#define EC_VER_SWITCH_ENABLE_WIRELESS 1

/* Version 0 params; no response */
struct ec_params_switch_enable_wireless_v0 {
        uint8_t enabled;
} __packed;

/* Version 1 params */
struct ec_params_switch_enable_wireless_v1 {
        /* Flags to enable now */
        uint8_t now_flags;

        /* Which flags to copy from now_flags */
        uint8_t now_mask;

        /*
         * Flags to leave enabled in S3, if they're on at the S0->S3
         * transition.  (Other flags will be disabled by the S0->S3
         * transition.)
         */
        uint8_t suspend_flags;

        /* Which flags to copy from suspend_flags */
        uint8_t suspend_mask;
} __packed;

/* Version 1 response */
struct ec_response_switch_enable_wireless_v1 {
        /* Flags to enable now */
        uint8_t now_flags;

        /* Flags to leave enabled in S3 */
        uint8_t suspend_flags;
} __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

/* Version 0 of input params and response */
struct ec_params_gpio_get {
        char name[32];
} __packed;
struct ec_response_gpio_get {
        uint8_t val;
} __packed;

/* Version 1 of input params and response */
struct ec_params_gpio_get_v1 {
        uint8_t subcmd;
        union {
                struct {
                        char name[32];
                } get_value_by_name;
                struct {
                        uint8_t index;
                } get_info;
        };
} __packed;

struct ec_response_gpio_get_v1 {
        union {
                struct {
                        uint8_t val;
                } get_value_by_name, get_count;
                struct {
                        uint8_t val;
                        char name[32];
                        uint32_t flags;
                } get_info;
        };
} __packed;

enum gpio_get_subcmd {
        EC_GPIO_GET_BY_NAME = 0,
        EC_GPIO_GET_COUNT = 1,
        EC_GPIO_GET_INFO = 2,
};

/*****************************************************************************/
/* I2C commands. Only available when flash write protect is unlocked. */

/*
 * TODO(crosbug.com/p/23570): These commands are deprecated, and will be
 * removed soon.  Use EC_CMD_I2C_XFER instead.
 */

/* Read I2C bus */
#define EC_CMD_I2C_READ 0x94

struct ec_params_i2c_read {
        uint16_t addr; /* 8-bit address (7-bit shifted << 1) */
        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; /* 8-bit address (7-bit shifted << 1) */
        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 charging the battery or force it to
 * discharge the battery.
 */
#define EC_CMD_CHARGE_CONTROL 0x96
#define EC_VER_CHARGE_CONTROL 1

enum ec_charge_control_mode {
        CHARGE_CONTROL_NORMAL = 0,
        CHARGE_CONTROL_IDLE,
        CHARGE_CONTROL_DISCHARGE,
};

struct ec_params_charge_control {
        uint32_t mode;  /* enum charge_control_mode */
} __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 immediately or after the host has shut down.
 *
 * return EC_RES_INVALID_COMMAND if unsupported by a board/battery.
 *        EC_RES_SUCCESS if the command was successful.
 *        EC_RES_ERROR if the cut off command failed.
 */

#define EC_CMD_BATTERY_CUT_OFF 0x99

#define EC_BATTERY_CUTOFF_FLAG_AT_SHUTDOWN      (1 << 0)

struct ec_params_battery_cutoff {
        uint8_t flags;
} __packed;

/*****************************************************************************/
/* USB port mux control. */

/*
 * Switch USB mux or return to automatic switching.
 */
#define EC_CMD_USB_MUX 0x9a

struct ec_params_usb_mux {
        uint8_t mux;
} __packed;

/*****************************************************************************/
/* LDOs / FETs control. */

enum ec_ldo_state {
        EC_LDO_STATE_OFF = 0,   /* the LDO / FET is shut down */
        EC_LDO_STATE_ON = 1,    /* the LDO / FET is ON / providing power */
};

/*
 * Switch on/off a LDO.
 */
#define EC_CMD_LDO_SET 0x9b

struct ec_params_ldo_set {
        uint8_t index;
        uint8_t state;
} __packed;

/*
 * Get LDO state.
 */
#define EC_CMD_LDO_GET 0x9c

struct ec_params_ldo_get {
        uint8_t index;
} __packed;

struct ec_response_ldo_get {
        uint8_t state;
} __packed;

/*****************************************************************************/
/* Power info. */

/*
 * Get power info.
 */
#define EC_CMD_POWER_INFO 0x9d

struct ec_response_power_info {
        uint32_t usb_dev_type;
        uint16_t voltage_ac;
        uint16_t voltage_system;
        uint16_t current_system;
        uint16_t usb_current_limit;
} __packed;

/*****************************************************************************/
/* I2C passthru command */

#define EC_CMD_I2C_PASSTHRU 0x9e

/* Read data; if not present, message is a write */
#define EC_I2C_FLAG_READ        (1 << 15)

/* Mask for address */
#define EC_I2C_ADDR_MASK        0x3ff

#define EC_I2C_STATUS_NAK       (1 << 0) /* Transfer was not acknowledged */
#define EC_I2C_STATUS_TIMEOUT   (1 << 1) /* Timeout during transfer */

/* Any error */
#define EC_I2C_STATUS_ERROR     (EC_I2C_STATUS_NAK | EC_I2C_STATUS_TIMEOUT)

struct ec_params_i2c_passthru_msg {
        uint16_t addr_flags;    /* I2C slave address (7 or 10 bits) and flags */
        uint16_t len;           /* Number of bytes to read or write */
} __packed;

struct ec_params_i2c_passthru {
        uint8_t port;           /* I2C port number */
        uint8_t num_msgs;       /* Number of messages */
        struct ec_params_i2c_passthru_msg msg[];
        /* Data to write for all messages is concatenated here */
} __packed;

struct ec_response_i2c_passthru {
        uint8_t i2c_status;     /* Status flags (EC_I2C_STATUS_...) */
        uint8_t num_msgs;       /* Number of messages processed */
        uint8_t data[];         /* Data read by messages concatenated here */
} __packed;

/*****************************************************************************/
/* Power button hang detect */

#define EC_CMD_HANG_DETECT 0x9f

/* Reasons to start hang detection timer */
/* Power button pressed */
#define EC_HANG_START_ON_POWER_PRESS  (1 << 0)

/* Lid closed */
#define EC_HANG_START_ON_LID_CLOSE    (1 << 1)

 /* Lid opened */
#define EC_HANG_START_ON_LID_OPEN     (1 << 2)

/* Start of AP S3->S0 transition (booting or resuming from suspend) */
#define EC_HANG_START_ON_RESUME       (1 << 3)

/* Reasons to cancel hang detection */

/* Power button released */
#define EC_HANG_STOP_ON_POWER_RELEASE (1 << 8)

/* Any host command from AP received */
#define EC_HANG_STOP_ON_HOST_COMMAND  (1 << 9)

/* Stop on end of AP S0->S3 transition (suspending or shutting down) */
#define EC_HANG_STOP_ON_SUSPEND       (1 << 10)

/*
 * If this flag is set, all the other fields are ignored, and the hang detect
 * timer is started.  This provides the AP a way to start the hang timer
 * without reconfiguring any of the other hang detect settings.  Note that
 * you must previously have configured the timeouts.
 */
#define EC_HANG_START_NOW             (1 << 30)

/*
 * If this flag is set, all the other fields are ignored (including
 * EC_HANG_START_NOW).  This provides the AP a way to stop the hang timer
 * without reconfiguring any of the other hang detect settings.
 */
#define EC_HANG_STOP_NOW              (1 << 31)

struct ec_params_hang_detect {
        /* Flags; see EC_HANG_* */
        uint32_t flags;

        /* Timeout in msec before generating host event, if enabled */
        uint16_t host_event_timeout_msec;

        /* Timeout in msec before generating warm reboot, if enabled */
        uint16_t warm_reboot_timeout_msec;
} __packed;

/*****************************************************************************/
/* Commands for battery charging */

/*
 * This is the single catch-all host command to exchange data regarding the
 * charge state machine (v2 and up).
 */
#define EC_CMD_CHARGE_STATE 0xa0

/* Subcommands for this host command */
enum charge_state_command {
        CHARGE_STATE_CMD_GET_STATE,
        CHARGE_STATE_CMD_GET_PARAM,
        CHARGE_STATE_CMD_SET_PARAM,
        CHARGE_STATE_NUM_CMDS
};

/*
 * Known param numbers are defined here. Ranges are reserved for board-specific
 * params, which are handled by the particular implementations.
 */
enum charge_state_params {
        CS_PARAM_CHG_VOLTAGE,         /* charger voltage limit */
        CS_PARAM_CHG_CURRENT,         /* charger current limit */
        CS_PARAM_CHG_INPUT_CURRENT,   /* charger input current limit */
        CS_PARAM_CHG_STATUS,          /* charger-specific status */
        CS_PARAM_CHG_OPTION,          /* charger-specific options */
        /* How many so far? */
        CS_NUM_BASE_PARAMS,

        /* Range for CONFIG_CHARGER_PROFILE_OVERRIDE params */
        CS_PARAM_CUSTOM_PROFILE_MIN = 0x10000,
        CS_PARAM_CUSTOM_PROFILE_MAX = 0x1ffff,

        /* Other custom param ranges go here... */
};

struct ec_params_charge_state {
        uint8_t cmd;                            /* enum charge_state_command */
        union {
                struct {
                        /* no args */
                } get_state;

                struct {
                        uint32_t param;         /* enum charge_state_param */
                } get_param;

                struct {
                        uint32_t param;         /* param to set */
                        uint32_t value;         /* value to set */
                } set_param;
        };
} __packed;

struct ec_response_charge_state {
        union {
                struct {
                        int ac;
                        int chg_voltage;
                        int chg_current;
                        int chg_input_current;
                        int batt_state_of_charge;
                } get_state;

                struct {
                        uint32_t value;
                } get_param;
                struct {
                        /* no return values */
                } set_param;
        };
} __packed;


/*
 * Set maximum battery charging current.
 */
#define EC_CMD_CHARGE_CURRENT_LIMIT 0xa1

struct ec_params_current_limit {
        uint32_t limit; /* in mA */
} __packed;

/*
 * Set maximum external power current.
 */
#define EC_CMD_EXT_POWER_CURRENT_LIMIT 0xa2

struct ec_params_ext_power_current_limit {
        uint32_t limit; /* in mA */
} __packed;

/*****************************************************************************/
/* Smart battery pass-through */

/* Get / Set 16-bit smart battery registers */
#define EC_CMD_SB_READ_WORD   0xb0
#define EC_CMD_SB_WRITE_WORD  0xb1

/* Get / Set string smart battery parameters
 * formatted as SMBUS "block".
 */
#define EC_CMD_SB_READ_BLOCK  0xb2
#define EC_CMD_SB_WRITE_BLOCK 0xb3

struct ec_params_sb_rd {
        uint8_t reg;
} __packed;

struct ec_response_sb_rd_word {
        uint16_t value;
} __packed;

struct ec_params_sb_wr_word {
        uint8_t reg;
        uint16_t value;
} __packed;

struct ec_response_sb_rd_block {
        uint8_t data[32];
} __packed;

struct ec_params_sb_wr_block {
        uint8_t reg;
        uint16_t data[32];
} __packed;

/*****************************************************************************/
/* Battery vendor parameters
 *
 * Get or set vendor-specific parameters in the battery. Implementations may
 * differ between boards or batteries. On a set operation, the response
 * contains the actual value set, which may be rounded or clipped from the
 * requested value.
 */

#define EC_CMD_BATTERY_VENDOR_PARAM 0xb4

enum ec_battery_vendor_param_mode {
        BATTERY_VENDOR_PARAM_MODE_GET = 0,
        BATTERY_VENDOR_PARAM_MODE_SET,
};

struct ec_params_battery_vendor_param {
        uint32_t param;
        uint32_t value;
        uint8_t mode;
} __packed;

struct ec_response_battery_vendor_param {
        uint32_t value;
} __packed;

/*****************************************************************************/
/* System commands */

/*
 * TODO(crosbug.com/p/23747): This is a confusing name, since it doesn't
 * necessarily reboot the EC.  Rename to "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
/* DPTF Target Fan Duty (0-100, 0xff for auto/none) */
#define EC_ACPI_MEM_FAN_DUTY           0x04

/*
 * DPTF temp thresholds. Any of the EC's temp sensors can have up to two
 * independent thresholds attached to them. The current value of the ID
 * register determines which sensor is affected by the THRESHOLD and COMMIT
 * registers. The THRESHOLD register uses the same EC_TEMP_SENSOR_OFFSET scheme
 * as the memory-mapped sensors. The COMMIT register applies those settings.
 *
 * The spec does not mandate any way to read back the threshold settings
 * themselves, but when a threshold is crossed the AP needs a way to determine
 * which sensor(s) are responsible. Each reading of the ID register clears and
 * returns one sensor ID that has crossed one of its threshold (in either
 * direction) since the last read. A value of 0xFF means "no new thresholds
 * have tripped". Setting or enabling the thresholds for a sensor will clear
 * the unread event count for that sensor.
 */
#define EC_ACPI_MEM_TEMP_ID            0x05
#define EC_ACPI_MEM_TEMP_THRESHOLD     0x06
#define EC_ACPI_MEM_TEMP_COMMIT        0x07
/*
 * Here are the bits for the COMMIT register:
 *   bit 0 selects the threshold index for the chosen sensor (0/1)
 *   bit 1 enables/disables the selected threshold (0 = off, 1 = on)
 * Each write to the commit register affects one threshold.
 */
#define EC_ACPI_MEM_TEMP_COMMIT_SELECT_MASK (1 << 0)
#define EC_ACPI_MEM_TEMP_COMMIT_ENABLE_MASK (1 << 1)
/*
 * Example:
 *
 * Set the thresholds for sensor 2 to 50 C and 60 C:
 *   write 2 to [0x05]      --  select temp sensor 2
 *   write 0x7b to [0x06]   --  C_TO_K(50) - EC_TEMP_SENSOR_OFFSET
 *   write 0x2 to [0x07]    --  enable threshold 0 with this value
 *   write 0x85 to [0x06]   --  C_TO_K(60) - EC_TEMP_SENSOR_OFFSET
 *   write 0x3 to [0x07]    --  enable threshold 1 with this value
 *
 * Disable the 60 C threshold, leaving the 50 C threshold unchanged:
 *   write 2 to [0x05]      --  select temp sensor 2
 *   write 0x1 to [0x07]    --  disable threshold 1
 */

/* DPTF battery charging current limit */
#define EC_ACPI_MEM_CHARGING_LIMIT     0x08

/* Charging limit is specified in 64 mA steps */
#define EC_ACPI_MEM_CHARGING_LIMIT_STEP_MA   64
/* Value to disable DPTF battery charging limit */
#define EC_ACPI_MEM_CHARGING_LIMIT_DISABLED  0xff

/* 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 0xdc or higher.
 */
#define EC_CMD_VERSION0 0xdc

#endif  /* !__ACPI__ */

/*****************************************************************************/
/*
 * PD commands
 *
 * These commands are for PD MCU communication.
 */

/* EC to PD MCU exchange status command */
#define EC_CMD_PD_EXCHANGE_STATUS 0x100

/* Status of EC being sent to PD */
struct ec_params_pd_status {
        int8_t batt_soc; /* battery state of charge */
} __packed;

/* Status of PD being sent back to EC */
struct ec_response_pd_status {
        int8_t status;        /* PD MCU status */
        uint32_t curr_lim_ma; /* input current limit */
} __packed;

/* Set USB type-C port role and muxes */
#define EC_CMD_USB_PD_CONTROL 0x101

enum usb_pd_control_role {
        USB_PD_CTRL_ROLE_NO_CHANGE = 0,
        USB_PD_CTRL_ROLE_TOGGLE_ON = 1, /* == AUTO */
        USB_PD_CTRL_ROLE_TOGGLE_OFF = 2,
        USB_PD_CTRL_ROLE_FORCE_SINK = 3,
        USB_PD_CTRL_ROLE_FORCE_SOURCE = 4,
};

enum usb_pd_control_mux {
        USB_PD_CTRL_MUX_NO_CHANGE = 0,
        USB_PD_CTRL_MUX_NONE = 1,
        USB_PD_CTRL_MUX_USB = 2,
        USB_PD_CTRL_MUX_DP = 3,
        USB_PD_CTRL_MUX_DOCK = 4,
        USB_PD_CTRL_MUX_AUTO = 5,
};

struct ec_params_usb_pd_control {
        uint8_t port;
        uint8_t role;
        uint8_t mux;
} __packed;

/*****************************************************************************/
/*
 * Passthru commands
 *
 * Some platforms have sub-processors chained to each other.  For example.
 *
 *     AP <--> EC <--> PD MCU
 *
 * The top 2 bits of the command number are used to indicate which device the
 * command is intended for.  Device 0 is always the device receiving the
 * command; other device mapping is board-specific.
 *
 * When a device receives a command to be passed to a sub-processor, it passes
 * it on with the device number set back to 0.  This allows the sub-processor
 * to remain blissfully unaware of whether the command originated on the next
 * device up the chain, or was passed through from the AP.
 *
 * In the above example, if the AP wants to send command 0x0002 to the PD MCU,
 *     AP sends command 0x4002 to the EC
 *     EC sends command 0x0002 to the PD MCU
 *     EC forwards PD MCU response back to the AP
 */

/* Offset and max command number for sub-device n */
#define EC_CMD_PASSTHRU_OFFSET(n) (0x4000 * (n))
#define EC_CMD_PASSTHRU_MAX(n) (EC_CMD_PASSTHRU_OFFSET(n) + 0x3fff)

/*****************************************************************************/
/*
 * Deprecated constants. These constants have been renamed for clarity. The
 * meaning and size has not changed. Programs that use the old names should
 * switch to the new names soon, as the old names may not be carried forward
 * forever.
 */
#define EC_HOST_PARAM_SIZE      EC_PROTO2_MAX_PARAM_SIZE
#define EC_LPC_ADDR_OLD_PARAM   EC_HOST_CMD_REGION1
#define EC_OLD_PARAM_SIZE       EC_HOST_CMD_REGION_SIZE

#endif  /* __CROS_EC_COMMANDS_H */