zephyr: add motion sense support

Add support for motion sense in zephyr. This change adds basic functions
for motion sense task to do meaningful work.
sensor_map.h included by board.h will be used to get board specific sensor
configuration.

BUG=b:173507858
BRANCH=none
TEST=make buildall -j8
build volteer on zephyr

Signed-off-by: Hyungwoo Yang <hyungwoo.yang@intel.corp-partner.google.com>
Change-Id: I906316d2e97428cf46b9a15071666c8e3b039b18
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2638909
Reviewed-by: Jack Rosenthal <jrosenth@chromium.org>
Commit-Queue: Jack Rosenthal <jrosenth@chromium.org>
Tested-by: Jack Rosenthal <jrosenth@chromium.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/zephyr/Kconfig.motionsense b/zephyr/Kconfig.motionsense
new file mode 100644
index 0000000000..b73d1b9d35
--- /dev/null
+++ b/zephyr/Kconfig.motionsense
@@ -0,0 +1,124 @@
+# Copyright 2021 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+menuconfig PLATFORM_EC_MOTIONSENSE
+    bool "Motion Sense"
+    select HAS_TASK_MOTIONSENSE
+    help
+      Enable motion sense task. The task collects data from available sensors
+      and report them to AP. Besides the task reports the sensor data to AP.
+      Based on the data, it also does other things like calculating lid angle
+      and detect tablet mode.
+
+config PLATFORM_EC_ACCEL_FIFO
+    bool "Sensor FIFO"
+    help
+      Enable this to add the sensor FIFO used by sensor device drivers to fill.
+      Using FIFO reduces power consumption since it reduces the number of
+      AP wake-ups.
+
+if PLATFORM_EC_ACCEL_FIFO
+
+config PLATFORM_EC_ACCEL_FIFO_SIZE
+    int "Motion Sense FIFO Size"
+    default 256
+    help
+      This sets the size of the sensor FIFO, must be a power of 2.
+
+config PLATFORM_EC_ACCEL_FIFO_THRES
+    int "FIFO Threshold"
+    default 85      # (PLATFORM_EC_ACCEL_FIFO_SIZE / 3)
+    help
+      This sets the amount of free entries that trigger an interrupt to the AP.
+
+endif # PLATFORM_EC_ACCEL_FIFO
+
+config PLATFORM_EC_SENSOR_TIGHT_TIMESTAMPS
+    bool "Extra Sensor Timestamp"
+    help
+      If this is defined, motion_sense sends
+      sensor events to the AP in the format
+      +-----------+
+      | Timestamp |
+      |  Payload  |
+      | Timestamp |
+      |  Payload  |
+      |    ...    |
+      +-----------+
+      If this is not defined, the events will be sent in the format
+      +-----------+
+      |  Payload  |
+      |  Payload  |
+      |  Payload  |
+      |    ...    |
+      | Timestamp |
+      +-----------+
+      The former format enables improved filtering of sensor event
+      timestamps on the AP, but comes with stricter jitter requirements.
+
+config PLATFORM_EC_ACCEL_INTERRUPTS
+    bool "Accelerometer Interrupts"
+    help
+      Enable this to allow a sensor driver to send an event to motion task when
+      the sensor gets the data ready interrupt. On the event, motion task calls
+      the driver's irq_handler to collect data.
+
+# TODO(b/173507858) config PLATFORM_EC_MOTION_FILL_LPC_SENSE_DATA
+# if PLATFORM_EC_MOTION_FILL_LPC_SENSE_DATA
+#endif # PLATFORM_EC_MOTION_FILL_LPC_SENSE_DATA
+
+config PLATFORM_EC_ALS
+    bool "Ambient Light Sensor(ALS)"
+    default y if HAS_TASK_ALS
+    help
+      Enable this to indicate there's at least one or more ALS devices available.
+      If PLATFORM_EC_MOTION_FILL_LPC_SENSE_DATA is set, then motion task updates
+      the designated part of EC memmap with the ALS data. The updating EC memmap
+      can be also done by the dedicated ALS task with HAS_ALS_TASK set.
+      Number of ALS entries reserved in EC memmap are defined by EC_ALS_ENTRIES
+      in ec_commands.h.
+
+if PLATFORM_EC_ALS
+
+config PLATFORM_EC_ALS_COUNT
+    int "Number of ALS devices"
+    default 1
+    help
+      This sets the number of ALS devices. This should be less than or equal to
+      EC_ALS_ENTRIES in ec_commands.h
+      TODO(b/173507858) move this to device tree
+
+endif # PLATFORM_EC_ALS
+
+config PLATFORM_EC_DYNAMIC_MOTION_SENSOR_COUNT
+    bool "Dynamic Motion Sensor Count"
+    help
+      Enable this to allow changing motion sensor count dynamically.
+
+config PLATFORM_EC_LID_ANGLE
+    bool "Lid Angle Sensor"
+    help
+      Enable this to detect lid angle with two accelerometers. The andgle
+      calculation requires the information about which sensor is on the lid
+      and which one is on the base. The calculated lid angle is used to
+      decide start/stop other peripherals like stop/start keyboard scanning.
+      # TODO(b/173507858): add more detail after .dts change
+
+if PLATFORM_EC_LID_ANGLE
+
+config PLATFORM_EC_TABLET_MODE
+    bool "Tablet Mode"
+    help
+      Enable this for a device which can be a tablet as well as a clamshell.
+      Tablet mode detection is done with current lid angle.
+
+config PLATFORM_EC_GMR_TABLET_MODE
+    bool "Giant Magnetoresistance(GMR) Tablet Mode"
+    help
+      Enable this to use GMR sensor to detect tablet mode.
+      It requires to set GMR_TABLET_MODE_GPIO_L to map the interrupt from
+      the sensor and direct its mapping to gmr_tablet_switch_isr
+      in common/tablet_mode.c.
+
+endif # PLATFORM_EC_LID_ANGLE