core: Add subcommands to MOTION_SENSE_CMD

These subcommands allow accessing sensor (accel+gyro)
over i2c.

BRANCH=ToT
BUG=chrome-os-partner:31071
TEST=Compile.

Change-Id: Ic6c3e9bf9c23f369de9f540c50daab7f2e4582ee
Signed-off-by: Gwendal Grignou <gwendal@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/225653

2 files changed, 56 insertions, 6 deletions

diff --git a/include/ec_commands.h b/include/ec_commands.h
index 3cea697cf9..52a0996b91 100644
--- a/include/ec_commands.h
+++ b/include/ec_commands.h
@@ -1301,6 +1301,18 @@ enum motionsense_command {
 	 */
 	MOTIONSENSE_CMD_KB_WAKE_ANGLE = 5,
 
+	/*
+	 * Sensor subsytem status.
+	 * Same format as EC_MEMMAP_ACC_STATUS
+	 * - for system without LPC -
+	 */
+	MOTIONSENSE_CMD_GET_STATUS = 6,
+
+	/*
+	 * Retrieve data and flags from all accel/gyro sensors.
+	 */
+	MOTIONSENSE_CMD_GET_DATA = 7,
+
 	/* Number of motionsense sub-commands. */
 	MOTIONSENSE_NUM_CMDS
 };
@@ -1351,10 +1363,10 @@ enum motionsensor_chip {
 struct ec_params_motion_sense {
 	uint8_t cmd;
 	union {
-		/* Used for MOTIONSENSE_CMD_DUMP. */
+		/* Used for MOTIONSENSE_CMD_DUMP, GET_STATUS, GET_DATA. */
 		struct {
 			/* no args */
-		} dump;
+		} data, dump, status;
 
 		/*
 		 * Used for MOTIONSENSE_CMD_EC_RATE and
@@ -1367,7 +1379,6 @@ struct ec_params_motion_sense {
 
 		/* Used for MOTIONSENSE_CMD_INFO. */
 		struct {
-			/* Should be element of enum motionsensor_id. */
 			uint8_t sensor_num;
 		} info;
 
@@ -1376,7 +1387,6 @@ struct ec_params_motion_sense {
 		 * 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. */
@@ -1392,18 +1402,40 @@ struct ec_params_motion_sense {
 
 struct ec_response_motion_sense {
 	union {
-		/* Used for MOTIONSENSE_CMD_DUMP. */
+		/* Used for MOTIONSENSE_CMD_DUMP */
 		struct {
 			/* Flags representing the motion sensor module. */
 			uint8_t module_flags;
 
-			/* Flags for each sensor in enum motionsensor_id. */
+			/* Flags for each sensor. */
 			uint8_t sensor_flags[EC_MOTION_SENSOR_COUNT];
 
 			/* Array of all sensor data. Each sensor is 3-axis. */
 			int16_t data[3*EC_MOTION_SENSOR_COUNT];
 		} dump;
 
+		/* Used for MOTIONSENSE_CMD_GET_DATA */
+		struct {
+			/* Flags representing the motion sensor module. */
+			uint8_t module_flags;
+
+			/* Number of sensors managed directly by the EC */
+			uint8_t sensor_number;
+
+			/*
+			 * sensor data is truncated if response_max is too small
+			 * for holding all the data.
+			 */
+			struct sensor_data {
+				/* Flags for each sensor. */
+				uint8_t flags;
+				uint8_t padding;
+
+				/* Each sensor is up to 3-axis. */
+				int16_t data[3];
+			} sensor[0];
+		} data;
+
 		/* Used for MOTIONSENSE_CMD_INFO. */
 		struct {
 			/* Should be element of enum motionsensor_type. */
@@ -1416,6 +1448,11 @@ struct ec_response_motion_sense {
 			uint8_t chip;
 		} info;
 
+		/* Used for MOTIONSENSE_CMD_GET_STATUS */
+		struct {
+			uint8_t value;
+		} status;
+
 		/*
 		 * Used for MOTIONSENSE_CMD_EC_RATE, MOTIONSENSE_CMD_SENSOR_ODR,
 		 * MOTIONSENSE_CMD_SENSOR_RANGE, and
diff --git a/util/ectool.c b/util/ectool.c
index 526807566f..2823ede20d 100644
--- a/util/ectool.c
+++ b/util/ectool.c
@@ -2323,6 +2323,17 @@ static int cmd_lightbar(int argc, char **argv)
 		sizeof(((struct ec_params_motion_sense *)0)->SUBCMD) \
 		+ sizeof(((struct ec_params_motion_sense *)0)->cmd), \
 		sizeof(((struct ec_response_motion_sense *)0)->SUBCMD) }
+/*
+ * For ectool only, assume no more than 16 sensors.
+ * More advanced implementation would allocate the right amount of
+ * memory depending on the number of sensors.
+ */
+#define ECTOOL_MAX_SENSOR 16
+#define MS_DATA_SIZE() { \
+		sizeof(((struct ec_params_motion_sense *)0)->data) \
+		+ sizeof(((struct ec_params_motion_sense *)0)->cmd), \
+		sizeof(((struct ec_response_motion_sense *)0)->data) \
+		+ ECTOOL_MAX_SENSOR * sizeof(struct sensor_data) }
 static const struct {
 	uint8_t insize;
 	uint8_t outsize;
@@ -2333,6 +2344,8 @@ static const struct {
 	MS_SIZES(sensor_odr),
 	MS_SIZES(sensor_range),
 	MS_SIZES(kb_wake_angle),
+	MS_SIZES(status),
+	MS_DATA_SIZE(),
 };
 BUILD_ASSERT(ARRAY_SIZE(ms_command_sizes) == MOTIONSENSE_NUM_CMDS);
 #undef MS_SIZES