ec_commands.h

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; /* 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 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

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

/* Slave address is 10 (not 7) bit */
#define EC_I2C_FLAG_10BIT	(1 << 16)

/* 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;


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

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