platform/chrome: cros_ec_sensorhub: Add FIFO support
cros_ec_sensorhub registers a listener and query motion sense FIFO, spread to iio sensors registers. To test, we can use libiio: iiod& iio_readdev -u ip:localhost -T 10000 -s 25 -b 16 cros-ec-gyro | od -x Signed-off-by: Gwendal Grignou <gwendal@chromium.org> Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
This commit is contained in:
Gwendal Grignou
Enric Balletbo i Serra
parent
cee416a347
commit
145d59baff
@ -20,7 +20,8 @@ obj-$(CONFIG_CROS_EC_CHARDEV) += cros_ec_chardev.o
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obj-$(CONFIG_CROS_EC_LIGHTBAR) += cros_ec_lightbar.o
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obj-$(CONFIG_CROS_EC_VBC) += cros_ec_vbc.o
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obj-$(CONFIG_CROS_EC_DEBUGFS) += cros_ec_debugfs.o
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obj-$(CONFIG_CROS_EC_SENSORHUB) += cros_ec_sensorhub.o
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cros-ec-sensorhub-objs := cros_ec_sensorhub.o cros_ec_sensorhub_ring.o
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obj-$(CONFIG_CROS_EC_SENSORHUB) += cros-ec-sensorhub.o
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obj-$(CONFIG_CROS_EC_SYSFS) += cros_ec_sysfs.o
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obj-$(CONFIG_CROS_USBPD_LOGGER) += cros_usbpd_logger.o
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obj-$(CONFIG_CROS_USBPD_NOTIFY) += cros_usbpd_notify.o
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@ -50,10 +50,8 @@ static int cros_ec_sensorhub_register(struct device *dev,
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struct cros_ec_sensorhub *sensorhub)
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{
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int sensor_type[MOTIONSENSE_TYPE_MAX] = { 0 };
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struct cros_ec_command *msg = sensorhub->msg;
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struct cros_ec_dev *ec = sensorhub->ec;
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struct ec_params_motion_sense *params;
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struct ec_response_motion_sense *resp;
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struct cros_ec_command *msg;
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int ret, i, sensor_num;
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char *name;
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@ -71,22 +69,13 @@ static int cros_ec_sensorhub_register(struct device *dev,
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return -EINVAL;
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}
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/* Prepare a message to send INFO command to each sensor. */
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msg = kzalloc(sizeof(*msg) + max(sizeof(*params), sizeof(*resp)),
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GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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msg->version = 1;
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msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
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msg->outsize = sizeof(*params);
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msg->insize = sizeof(*resp);
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params = (struct ec_params_motion_sense *)msg->data;
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resp = (struct ec_response_motion_sense *)msg->data;
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msg->insize = sizeof(struct ec_response_motion_sense);
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msg->outsize = sizeof(struct ec_params_motion_sense);
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for (i = 0; i < sensor_num; i++) {
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params->cmd = MOTIONSENSE_CMD_INFO;
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params->info.sensor_num = i;
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sensorhub->params->cmd = MOTIONSENSE_CMD_INFO;
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sensorhub->params->info.sensor_num = i;
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ret = cros_ec_cmd_xfer_status(ec->ec_dev, msg);
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if (ret < 0) {
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@ -95,7 +84,7 @@ static int cros_ec_sensorhub_register(struct device *dev,
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continue;
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}
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switch (resp->info.type) {
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switch (sensorhub->resp->info.type) {
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case MOTIONSENSE_TYPE_ACCEL:
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name = "cros-ec-accel";
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break;
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@ -118,15 +107,16 @@ static int cros_ec_sensorhub_register(struct device *dev,
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name = "cros-ec-activity";
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break;
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default:
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dev_warn(dev, "unknown type %d\n", resp->info.type);
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dev_warn(dev, "unknown type %d\n",
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sensorhub->resp->info.type);
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continue;
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}
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ret = cros_ec_sensorhub_allocate_sensor(dev, name, i);
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if (ret)
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goto error;
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return ret;
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sensor_type[resp->info.type]++;
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sensor_type[sensorhub->resp->info.type]++;
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}
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if (sensor_type[MOTIONSENSE_TYPE_ACCEL] >= 2)
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@ -138,29 +128,41 @@ static int cros_ec_sensorhub_register(struct device *dev,
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"cros-ec-lid-angle",
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0);
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if (ret)
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goto error;
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return ret;
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}
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kfree(msg);
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return 0;
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error:
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kfree(msg);
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return ret;
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}
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static int cros_ec_sensorhub_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct cros_ec_dev *ec = dev_get_drvdata(dev->parent);
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struct cros_ec_sensorhub *data;
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struct cros_ec_command *msg;
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int ret;
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int i;
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msg = devm_kzalloc(dev, sizeof(struct cros_ec_command) +
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max((u16)sizeof(struct ec_params_motion_sense),
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ec->ec_dev->max_response), GFP_KERNEL);
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if (!msg)
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return -ENOMEM;
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msg->command = EC_CMD_MOTION_SENSE_CMD + ec->cmd_offset;
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data = devm_kzalloc(dev, sizeof(struct cros_ec_sensorhub), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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data->ec = dev_get_drvdata(dev->parent);
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mutex_init(&data->cmd_lock);
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data->dev = dev;
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data->ec = ec;
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data->msg = msg;
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data->params = (struct ec_params_motion_sense *)msg->data;
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data->resp = (struct ec_response_motion_sense *)msg->data;
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dev_set_drvdata(dev, data);
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/* Check whether this EC is a sensor hub. */
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@ -182,12 +184,63 @@ static int cros_ec_sensorhub_probe(struct platform_device *pdev)
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}
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}
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/*
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* If the EC does not have a FIFO, the sensors will query their data
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* themselves via sysfs or a software trigger.
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*/
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO)) {
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ret = cros_ec_sensorhub_ring_add(data);
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if (ret)
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return ret;
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/*
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* The msg and its data is not under the control of the ring
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* handler.
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*/
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return devm_add_action_or_reset(dev,
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cros_ec_sensorhub_ring_remove,
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data);
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}
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return 0;
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}
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#ifdef CONFIG_PM_SLEEP
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/*
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* When the EC is suspending, we must stop sending interrupt,
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* we may use the same interrupt line for waking up the device.
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* Tell the EC to stop sending non-interrupt event on the iio ring.
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*/
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static int cros_ec_sensorhub_suspend(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct cros_ec_sensorhub *sensorhub = platform_get_drvdata(pdev);
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struct cros_ec_dev *ec = sensorhub->ec;
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO))
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return cros_ec_sensorhub_ring_fifo_enable(sensorhub, false);
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return 0;
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}
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static int cros_ec_sensorhub_resume(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct cros_ec_sensorhub *sensorhub = platform_get_drvdata(pdev);
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struct cros_ec_dev *ec = sensorhub->ec;
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if (cros_ec_check_features(ec, EC_FEATURE_MOTION_SENSE_FIFO))
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return cros_ec_sensorhub_ring_fifo_enable(sensorhub, true);
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return 0;
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}
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#endif
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static SIMPLE_DEV_PM_OPS(cros_ec_sensorhub_pm_ops,
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cros_ec_sensorhub_suspend,
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cros_ec_sensorhub_resume);
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static struct platform_driver cros_ec_sensorhub_driver = {
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.driver = {
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.name = DRV_NAME,
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.pm = &cros_ec_sensorhub_pm_ops,
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},
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.probe = cros_ec_sensorhub_probe,
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};
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439
drivers/platform/chrome/cros_ec_sensorhub_ring.c
Normal file
439
drivers/platform/chrome/cros_ec_sensorhub_ring.c
Normal file
@ -0,0 +1,439 @@
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Driver for Chrome OS EC Sensor hub FIFO.
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*
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* Copyright 2020 Google LLC
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*/
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#include <linux/delay.h>
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#include <linux/device.h>
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#include <linux/iio/iio.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_data/cros_ec_commands.h>
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#include <linux/platform_data/cros_ec_proto.h>
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#include <linux/platform_data/cros_ec_sensorhub.h>
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#include <linux/platform_device.h>
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#include <linux/sort.h>
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#include <linux/slab.h>
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static inline int
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cros_sensorhub_send_sample(struct cros_ec_sensorhub *sensorhub,
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struct cros_ec_sensors_ring_sample *sample)
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{
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cros_ec_sensorhub_push_data_cb_t cb;
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int id = sample->sensor_id;
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struct iio_dev *indio_dev;
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if (id > sensorhub->sensor_num)
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return -EINVAL;
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cb = sensorhub->push_data[id].push_data_cb;
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if (!cb)
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return 0;
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indio_dev = sensorhub->push_data[id].indio_dev;
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if (sample->flag & MOTIONSENSE_SENSOR_FLAG_FLUSH)
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return 0;
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return cb(indio_dev, sample->vector, sample->timestamp);
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}
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/**
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* cros_ec_sensorhub_register_push_data() - register the callback to the hub.
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*
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* @sensorhub : Sensor Hub object
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* @sensor_num : The sensor the caller is interested in.
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* @indio_dev : The iio device to use when a sample arrives.
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* @cb : The callback to call when a sample arrives.
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*
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* The callback cb will be used by cros_ec_sensorhub_ring to distribute events
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* from the EC.
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*
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* Return: 0 when callback is registered.
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* EINVAL is the sensor number is invalid or the slot already used.
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*/
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int cros_ec_sensorhub_register_push_data(struct cros_ec_sensorhub *sensorhub,
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u8 sensor_num,
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struct iio_dev *indio_dev,
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cros_ec_sensorhub_push_data_cb_t cb)
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{
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if (sensor_num >= sensorhub->sensor_num)
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return -EINVAL;
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if (sensorhub->push_data[sensor_num].indio_dev)
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return -EINVAL;
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sensorhub->push_data[sensor_num].indio_dev = indio_dev;
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sensorhub->push_data[sensor_num].push_data_cb = cb;
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return 0;
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}
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EXPORT_SYMBOL_GPL(cros_ec_sensorhub_register_push_data);
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void cros_ec_sensorhub_unregister_push_data(struct cros_ec_sensorhub *sensorhub,
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u8 sensor_num)
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{
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sensorhub->push_data[sensor_num].indio_dev = NULL;
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sensorhub->push_data[sensor_num].push_data_cb = NULL;
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}
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EXPORT_SYMBOL_GPL(cros_ec_sensorhub_unregister_push_data);
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/**
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* cros_ec_sensorhub_ring_fifo_enable() - Enable or disable interrupt generation
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* for FIFO events.
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* @sensorhub: Sensor Hub object
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* @on: true when events are requested.
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*
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* To be called before sleeping or when noone is listening.
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* Return: 0 on success, or an error when we can not communicate with the EC.
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*
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*/
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int cros_ec_sensorhub_ring_fifo_enable(struct cros_ec_sensorhub *sensorhub,
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bool on)
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{
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int ret;
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mutex_lock(&sensorhub->cmd_lock);
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sensorhub->params->cmd = MOTIONSENSE_CMD_FIFO_INT_ENABLE;
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sensorhub->params->fifo_int_enable.enable = on;
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sensorhub->msg->outsize = sizeof(struct ec_params_motion_sense);
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sensorhub->msg->insize = sizeof(struct ec_response_motion_sense);
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ret = cros_ec_cmd_xfer_status(sensorhub->ec->ec_dev, sensorhub->msg);
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mutex_unlock(&sensorhub->cmd_lock);
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/* We expect to receive a payload of 4 bytes, ignore. */
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if (ret > 0)
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ret = 0;
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return ret;
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}
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/**
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* cros_ec_sensor_ring_process_event() - process one EC FIFO event
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*
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* @sensorhub: Sensor Hub object.
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* @fifo_info: FIFO information from the EC (includes b point, EC timebase).
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* @fifo_timestamp: EC IRQ, kernel timebase (aka c).
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* @current_timestamp: calculated event timestamp, kernel timebase (aka a').
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* @in: incoming FIFO event from EC (includes a point, EC timebase).
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* @out: outgoing event to user space (includes a').
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*
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* Process one EC event, add it in the ring if necessary.
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*
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* Return: true if out event has been populated.
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*/
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static bool
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cros_ec_sensor_ring_process_event(struct cros_ec_sensorhub *sensorhub,
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const struct ec_response_motion_sense_fifo_info
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*fifo_info,
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const ktime_t fifo_timestamp,
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ktime_t *current_timestamp,
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struct ec_response_motion_sensor_data *in,
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struct cros_ec_sensors_ring_sample *out)
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{
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const s64 now = cros_ec_get_time_ns();
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int axis, async_flags;
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/* Do not populate the filter based on asynchronous events. */
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async_flags = in->flags &
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(MOTIONSENSE_SENSOR_FLAG_ODR | MOTIONSENSE_SENSOR_FLAG_FLUSH);
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if (in->flags & MOTIONSENSE_SENSOR_FLAG_TIMESTAMP && !async_flags) {
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s64 new_timestamp;
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/*
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* Disable filtering since we might add more jitter
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* if b is in a random point in time.
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*/
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new_timestamp = fifo_timestamp -
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fifo_info->timestamp * 1000 +
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in->timestamp * 1000;
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/*
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* The timestamp can be stale if we had to use the fifo
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* info timestamp.
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*/
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if (new_timestamp - *current_timestamp > 0)
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*current_timestamp = new_timestamp;
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}
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if (in->flags & MOTIONSENSE_SENSOR_FLAG_FLUSH) {
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out->sensor_id = in->sensor_num;
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out->timestamp = *current_timestamp;
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out->flag = in->flags;
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/*
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* No other payload information provided with
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* flush ack.
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*/
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return true;
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}
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if (in->flags & MOTIONSENSE_SENSOR_FLAG_TIMESTAMP)
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/* If we just have a timestamp, skip this entry. */
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return false;
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/* Regular sample */
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out->sensor_id = in->sensor_num;
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if (*current_timestamp - now > 0)
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/* If the timestamp is in the future. */
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out->timestamp = now;
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else
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out->timestamp = *current_timestamp;
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out->flag = in->flags;
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for (axis = 0; axis < 3; axis++)
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out->vector[axis] = in->data[axis];
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return true;
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}
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/**
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* cros_ec_sensorhub_ring_handler() - The trigger handler function
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*
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* @sensorhub: Sensor Hub object.
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*
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* Called by the notifier, process the EC sensor FIFO queue.
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*/
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static void cros_ec_sensorhub_ring_handler(struct cros_ec_sensorhub *sensorhub)
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{
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struct ec_response_motion_sense_fifo_info *fifo_info =
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sensorhub->fifo_info;
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struct cros_ec_dev *ec = sensorhub->ec;
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ktime_t fifo_timestamp, current_timestamp;
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int i, j, number_data, ret;
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struct ec_response_motion_sensor_data *in;
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struct cros_ec_sensors_ring_sample *out, *last_out;
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mutex_lock(&sensorhub->cmd_lock);
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/* Get FIFO information if there are lost vectors. */
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if (fifo_info->total_lost) {
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int fifo_info_length =
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sizeof(struct ec_response_motion_sense_fifo_info) +
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sizeof(u16) * sensorhub->sensor_num;
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/* Need to retrieve the number of lost vectors per sensor */
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sensorhub->params->cmd = MOTIONSENSE_CMD_FIFO_INFO;
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sensorhub->msg->outsize = 1;
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sensorhub->msg->insize = fifo_info_length;
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if (cros_ec_cmd_xfer_status(ec->ec_dev, sensorhub->msg) < 0)
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goto error;
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memcpy(fifo_info, &sensorhub->resp->fifo_info,
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fifo_info_length);
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/*
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* Update collection time, will not be as precise as the
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* non-error case.
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*/
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fifo_timestamp = cros_ec_get_time_ns();
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} else {
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fifo_timestamp = sensorhub->fifo_timestamp[
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CROS_EC_SENSOR_NEW_TS];
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}
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if (fifo_info->count > sensorhub->fifo_size ||
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fifo_info->size != sensorhub->fifo_size) {
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dev_warn(sensorhub->dev,
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"Mismatch EC data: count %d, size %d - expected %d",
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fifo_info->count, fifo_info->size,
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sensorhub->fifo_size);
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goto error;
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}
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/* Copy elements in the main fifo */
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current_timestamp = sensorhub->fifo_timestamp[CROS_EC_SENSOR_LAST_TS];
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out = sensorhub->ring;
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for (i = 0; i < fifo_info->count; i += number_data) {
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sensorhub->params->cmd = MOTIONSENSE_CMD_FIFO_READ;
|
||||
sensorhub->params->fifo_read.max_data_vector =
|
||||
fifo_info->count - i;
|
||||
sensorhub->msg->outsize =
|
||||
sizeof(struct ec_params_motion_sense);
|
||||
sensorhub->msg->insize =
|
||||
sizeof(sensorhub->resp->fifo_read) +
|
||||
sensorhub->params->fifo_read.max_data_vector *
|
||||
sizeof(struct ec_response_motion_sensor_data);
|
||||
ret = cros_ec_cmd_xfer_status(ec->ec_dev, sensorhub->msg);
|
||||
if (ret < 0) {
|
||||
dev_warn(sensorhub->dev, "Fifo error: %d\n", ret);
|
||||
break;
|
||||
}
|
||||
number_data = sensorhub->resp->fifo_read.number_data;
|
||||
if (number_data == 0) {
|
||||
dev_dbg(sensorhub->dev, "Unexpected empty FIFO\n");
|
||||
break;
|
||||
}
|
||||
if (number_data > fifo_info->count - i) {
|
||||
dev_warn(sensorhub->dev,
|
||||
"Invalid EC data: too many entry received: %d, expected %d",
|
||||
number_data, fifo_info->count - i);
|
||||
break;
|
||||
}
|
||||
if (out + number_data >
|
||||
sensorhub->ring + fifo_info->count) {
|
||||
dev_warn(sensorhub->dev,
|
||||
"Too many samples: %d (%zd data) to %d entries for expected %d entries",
|
||||
i, out - sensorhub->ring, i + number_data,
|
||||
fifo_info->count);
|
||||
break;
|
||||
}
|
||||
|
||||
for (in = sensorhub->resp->fifo_read.data, j = 0;
|
||||
j < number_data; j++, in++) {
|
||||
if (cros_ec_sensor_ring_process_event(
|
||||
sensorhub, fifo_info,
|
||||
fifo_timestamp,
|
||||
¤t_timestamp,
|
||||
in, out))
|
||||
out++;
|
||||
}
|
||||
}
|
||||
mutex_unlock(&sensorhub->cmd_lock);
|
||||
last_out = out;
|
||||
|
||||
if (out == sensorhub->ring)
|
||||
/* Unexpected empty FIFO. */
|
||||
goto ring_handler_end;
|
||||
|
||||
/*
|
||||
* Check if current_timestamp is ahead of the last sample.
|
||||
* Normally, the EC appends a timestamp after the last sample, but if
|
||||
* the AP is slow to respond to the IRQ, the EC may have added new
|
||||
* samples. Use the FIFO info timestamp as last timestamp then.
|
||||
*/
|
||||
if ((last_out - 1)->timestamp == current_timestamp)
|
||||
current_timestamp = fifo_timestamp;
|
||||
|
||||
/* Warn on lost samples. */
|
||||
if (fifo_info->total_lost)
|
||||
for (i = 0; i < sensorhub->sensor_num; i++) {
|
||||
if (fifo_info->lost[i])
|
||||
dev_warn_ratelimited(sensorhub->dev,
|
||||
"Sensor %d: lost: %d out of %d\n",
|
||||
i, fifo_info->lost[i],
|
||||
fifo_info->total_lost);
|
||||
}
|
||||
|
||||
/* Push the event into the FIFO. */
|
||||
for (out = sensorhub->ring; out < last_out; out++)
|
||||
cros_sensorhub_send_sample(sensorhub, out);
|
||||
|
||||
ring_handler_end:
|
||||
sensorhub->fifo_timestamp[CROS_EC_SENSOR_LAST_TS] = current_timestamp;
|
||||
return;
|
||||
|
||||
error:
|
||||
mutex_unlock(&sensorhub->cmd_lock);
|
||||
}
|
||||
|
||||
static int cros_ec_sensorhub_event(struct notifier_block *nb,
|
||||
unsigned long queued_during_suspend,
|
||||
void *_notify)
|
||||
{
|
||||
struct cros_ec_sensorhub *sensorhub;
|
||||
struct cros_ec_device *ec_dev;
|
||||
|
||||
sensorhub = container_of(nb, struct cros_ec_sensorhub, notifier);
|
||||
ec_dev = sensorhub->ec->ec_dev;
|
||||
|
||||
if (ec_dev->event_data.event_type != EC_MKBP_EVENT_SENSOR_FIFO)
|
||||
return NOTIFY_DONE;
|
||||
|
||||
if (ec_dev->event_size != sizeof(ec_dev->event_data.data.sensor_fifo)) {
|
||||
dev_warn(ec_dev->dev, "Invalid fifo info size\n");
|
||||
return NOTIFY_DONE;
|
||||
}
|
||||
|
||||
if (queued_during_suspend)
|
||||
return NOTIFY_OK;
|
||||
|
||||
memcpy(sensorhub->fifo_info, &ec_dev->event_data.data.sensor_fifo.info,
|
||||
sizeof(*sensorhub->fifo_info));
|
||||
sensorhub->fifo_timestamp[CROS_EC_SENSOR_NEW_TS] =
|
||||
ec_dev->last_event_time;
|
||||
cros_ec_sensorhub_ring_handler(sensorhub);
|
||||
|
||||
return NOTIFY_OK;
|
||||
}
|
||||
|
||||
/**
|
||||
* cros_ec_sensorhub_ring_add() - Add the FIFO functionality if the EC
|
||||
* supports it.
|
||||
*
|
||||
* @sensorhub : Sensor Hub object.
|
||||
*
|
||||
* Return: 0 on success.
|
||||
*/
|
||||
int cros_ec_sensorhub_ring_add(struct cros_ec_sensorhub *sensorhub)
|
||||
{
|
||||
struct cros_ec_dev *ec = sensorhub->ec;
|
||||
int ret;
|
||||
int fifo_info_length =
|
||||
sizeof(struct ec_response_motion_sense_fifo_info) +
|
||||
sizeof(u16) * sensorhub->sensor_num;
|
||||
|
||||
/* Allocate the array for lost events. */
|
||||
sensorhub->fifo_info = devm_kzalloc(sensorhub->dev, fifo_info_length,
|
||||
GFP_KERNEL);
|
||||
if (!sensorhub->fifo_info)
|
||||
return -ENOMEM;
|
||||
|
||||
/* Retrieve FIFO information */
|
||||
sensorhub->msg->version = 2;
|
||||
sensorhub->params->cmd = MOTIONSENSE_CMD_FIFO_INFO;
|
||||
sensorhub->msg->outsize = 1;
|
||||
sensorhub->msg->insize = fifo_info_length;
|
||||
|
||||
ret = cros_ec_cmd_xfer_status(ec->ec_dev, sensorhub->msg);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/*
|
||||
* Allocate the full fifo. We need to copy the whole FIFO to set
|
||||
* timestamps properly.
|
||||
*/
|
||||
sensorhub->fifo_size = sensorhub->resp->fifo_info.size;
|
||||
sensorhub->ring = devm_kcalloc(sensorhub->dev, sensorhub->fifo_size,
|
||||
sizeof(*sensorhub->ring), GFP_KERNEL);
|
||||
if (!sensorhub->ring)
|
||||
return -ENOMEM;
|
||||
|
||||
/*
|
||||
* Allocate the callback area based on the number of sensors.
|
||||
*/
|
||||
sensorhub->push_data = devm_kcalloc(
|
||||
sensorhub->dev, sensorhub->sensor_num,
|
||||
sizeof(*sensorhub->push_data),
|
||||
GFP_KERNEL);
|
||||
if (!sensorhub->push_data)
|
||||
return -ENOMEM;
|
||||
|
||||
sensorhub->fifo_timestamp[CROS_EC_SENSOR_LAST_TS] =
|
||||
cros_ec_get_time_ns();
|
||||
|
||||
/* Register the notifier that will act as a top half interrupt. */
|
||||
sensorhub->notifier.notifier_call = cros_ec_sensorhub_event;
|
||||
ret = blocking_notifier_chain_register(&ec->ec_dev->event_notifier,
|
||||
&sensorhub->notifier);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Start collection samples. */
|
||||
return cros_ec_sensorhub_ring_fifo_enable(sensorhub, true);
|
||||
}
|
||||
|
||||
void cros_ec_sensorhub_ring_remove(void *arg)
|
||||
{
|
||||
struct cros_ec_sensorhub *sensorhub = arg;
|
||||
struct cros_ec_device *ec_dev = sensorhub->ec->ec_dev;
|
||||
|
||||
/* Disable the ring, prevent EC interrupt to the AP for nothing. */
|
||||
cros_ec_sensorhub_ring_fifo_enable(sensorhub, false);
|
||||
blocking_notifier_chain_unregister(&ec_dev->event_notifier,
|
||||
&sensorhub->notifier);
|
||||
}
|
||||
@ -8,8 +8,13 @@
|
||||
#ifndef __LINUX_PLATFORM_DATA_CROS_EC_SENSORHUB_H
|
||||
#define __LINUX_PLATFORM_DATA_CROS_EC_SENSORHUB_H
|
||||
|
||||
#include <linux/ktime.h>
|
||||
#include <linux/mutex.h>
|
||||
#include <linux/notifier.h>
|
||||
#include <linux/platform_data/cros_ec_commands.h>
|
||||
|
||||
struct iio_dev;
|
||||
|
||||
/**
|
||||
* struct cros_ec_sensor_platform - ChromeOS EC sensor platform information.
|
||||
* @sensor_num: Id of the sensor, as reported by the EC.
|
||||
@ -19,14 +24,85 @@ struct cros_ec_sensor_platform {
|
||||
};
|
||||
|
||||
/**
|
||||
* struct cros_ec_sensorhub - Sensor Hub device data.
|
||||
* typedef cros_ec_sensorhub_push_data_cb_t - Callback function to send datum
|
||||
* to specific sensors.
|
||||
*
|
||||
* @ec: Embedded Controller where the hub is located.
|
||||
* @sensor_num: Number of MEMS sensors present in the EC.
|
||||
* @indio_dev: The IIO device that will process the sample.
|
||||
* @data: Vector array of the ring sample.
|
||||
* @timestamp: Timestamp in host timespace when the sample was acquired by
|
||||
* the EC.
|
||||
*/
|
||||
struct cros_ec_sensorhub {
|
||||
struct cros_ec_dev *ec;
|
||||
int sensor_num;
|
||||
typedef int (*cros_ec_sensorhub_push_data_cb_t)(struct iio_dev *indio_dev,
|
||||
s16 *data,
|
||||
s64 timestamp);
|
||||
|
||||
struct cros_ec_sensorhub_sensor_push_data {
|
||||
struct iio_dev *indio_dev;
|
||||
cros_ec_sensorhub_push_data_cb_t push_data_cb;
|
||||
};
|
||||
|
||||
enum {
|
||||
CROS_EC_SENSOR_LAST_TS,
|
||||
CROS_EC_SENSOR_NEW_TS,
|
||||
CROS_EC_SENSOR_ALL_TS
|
||||
};
|
||||
|
||||
struct cros_ec_sensors_ring_sample {
|
||||
u8 sensor_id;
|
||||
u8 flag;
|
||||
s16 vector[3];
|
||||
s64 timestamp;
|
||||
} __packed;
|
||||
|
||||
/**
|
||||
* struct cros_ec_sensorhub - Sensor Hub device data.
|
||||
*
|
||||
* @dev: Device object, mostly used for logging.
|
||||
* @ec: Embedded Controller where the hub is located.
|
||||
* @sensor_num: Number of MEMS sensors present in the EC.
|
||||
* @msg: Structure to send FIFO requests.
|
||||
* @params: Pointer to parameters in msg.
|
||||
* @resp: Pointer to responses in msg.
|
||||
* @cmd_lock : Lock for sending msg.
|
||||
* @notifier: Notifier to kick the FIFO interrupt.
|
||||
* @ring: Preprocessed ring to store events.
|
||||
* @fifo_timestamp: array for event timestamp and spreading.
|
||||
* @fifo_info: copy of FIFO information coming from the EC.
|
||||
* @fifo_size: size of the ring.
|
||||
* @push_data: array of callback to send datums to iio sensor object.
|
||||
*/
|
||||
struct cros_ec_sensorhub {
|
||||
struct device *dev;
|
||||
struct cros_ec_dev *ec;
|
||||
int sensor_num;
|
||||
|
||||
struct cros_ec_command *msg;
|
||||
struct ec_params_motion_sense *params;
|
||||
struct ec_response_motion_sense *resp;
|
||||
struct mutex cmd_lock; /* Lock for protecting msg structure. */
|
||||
|
||||
struct notifier_block notifier;
|
||||
|
||||
struct cros_ec_sensors_ring_sample *ring;
|
||||
|
||||
ktime_t fifo_timestamp[CROS_EC_SENSOR_ALL_TS];
|
||||
struct ec_response_motion_sense_fifo_info *fifo_info;
|
||||
int fifo_size;
|
||||
|
||||
struct cros_ec_sensorhub_sensor_push_data *push_data;
|
||||
};
|
||||
|
||||
int cros_ec_sensorhub_register_push_data(struct cros_ec_sensorhub *sensorhub,
|
||||
u8 sensor_num,
|
||||
struct iio_dev *indio_dev,
|
||||
cros_ec_sensorhub_push_data_cb_t cb);
|
||||
|
||||
void cros_ec_sensorhub_unregister_push_data(struct cros_ec_sensorhub *sensorhub,
|
||||
u8 sensor_num);
|
||||
|
||||
int cros_ec_sensorhub_ring_add(struct cros_ec_sensorhub *sensorhub);
|
||||
void cros_ec_sensorhub_ring_remove(void *arg);
|
||||
int cros_ec_sensorhub_ring_fifo_enable(struct cros_ec_sensorhub *sensorhub,
|
||||
bool on);
|
||||
|
||||
#endif /* __LINUX_PLATFORM_DATA_CROS_EC_SENSORHUB_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user