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![Pablo Ceballos](/assets/img/avatar_default.png)
Some HID devices don't use a report ID because they only have a single report. In those cases, the report ID in struct hid_report will be zero and the data for the report will start at the first byte, so don't skip over the first byte. Signed-off-by: Pablo Ceballos <pceballos@google.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
773 lines
21 KiB
C
773 lines
21 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* HID Sensors Driver
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* Copyright (c) 2012, Intel Corporation.
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*/
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/mfd/core.h>
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#include <linux/list.h>
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#include <linux/hid-sensor-ids.h>
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#include <linux/hid-sensor-hub.h>
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#include "hid-ids.h"
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#define HID_SENSOR_HUB_ENUM_QUIRK 0x01
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/**
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* struct sensor_hub_data - Hold a instance data for a HID hub device
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* @hsdev: Stored hid instance for current hub device.
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* @mutex: Mutex to serialize synchronous request.
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* @lock: Spin lock to protect pending request structure.
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* @dyn_callback_list: Holds callback function
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* @dyn_callback_lock: spin lock to protect callback list
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* @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
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* @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
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* @ref_cnt: Number of MFD clients have opened this device
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*/
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struct sensor_hub_data {
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struct mutex mutex;
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spinlock_t lock;
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struct list_head dyn_callback_list;
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spinlock_t dyn_callback_lock;
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struct mfd_cell *hid_sensor_hub_client_devs;
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int hid_sensor_client_cnt;
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unsigned long quirks;
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int ref_cnt;
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};
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/**
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* struct hid_sensor_hub_callbacks_list - Stores callback list
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* @list: list head.
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* @usage_id: usage id for a physical device.
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* @usage_callback: Stores registered callback functions.
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* @priv: Private data for a physical device.
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*/
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struct hid_sensor_hub_callbacks_list {
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struct list_head list;
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u32 usage_id;
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struct hid_sensor_hub_device *hsdev;
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struct hid_sensor_hub_callbacks *usage_callback;
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void *priv;
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};
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static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
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int dir)
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{
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struct hid_report *report;
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list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
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if (report->id == id)
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return report;
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}
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hid_warn(hdev, "No report with id 0x%x found\n", id);
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return NULL;
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}
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static int sensor_hub_get_physical_device_count(struct hid_device *hdev)
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{
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int i;
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int count = 0;
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for (i = 0; i < hdev->maxcollection; ++i) {
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struct hid_collection *collection = &hdev->collection[i];
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if (collection->type == HID_COLLECTION_PHYSICAL ||
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collection->type == HID_COLLECTION_APPLICATION)
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++count;
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}
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return count;
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}
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static void sensor_hub_fill_attr_info(
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struct hid_sensor_hub_attribute_info *info,
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s32 index, s32 report_id, struct hid_field *field)
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{
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info->index = index;
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info->report_id = report_id;
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info->units = field->unit;
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info->unit_expo = field->unit_exponent;
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info->size = (field->report_size * field->report_count)/8;
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info->logical_minimum = field->logical_minimum;
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info->logical_maximum = field->logical_maximum;
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}
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static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
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struct hid_device *hdev,
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u32 usage_id,
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int collection_index,
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struct hid_sensor_hub_device **hsdev,
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void **priv)
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{
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struct hid_sensor_hub_callbacks_list *callback;
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struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
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unsigned long flags;
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spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
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list_for_each_entry(callback, &pdata->dyn_callback_list, list)
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if ((callback->usage_id == usage_id ||
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callback->usage_id == HID_USAGE_SENSOR_COLLECTION) &&
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(collection_index >=
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callback->hsdev->start_collection_index) &&
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(collection_index <
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callback->hsdev->end_collection_index)) {
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*priv = callback->priv;
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*hsdev = callback->hsdev;
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spin_unlock_irqrestore(&pdata->dyn_callback_lock,
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flags);
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return callback->usage_callback;
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}
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return NULL;
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}
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int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
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u32 usage_id,
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struct hid_sensor_hub_callbacks *usage_callback)
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{
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struct hid_sensor_hub_callbacks_list *callback;
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struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
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unsigned long flags;
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spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
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list_for_each_entry(callback, &pdata->dyn_callback_list, list)
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if (callback->usage_id == usage_id &&
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callback->hsdev == hsdev) {
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return -EINVAL;
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}
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callback = kzalloc(sizeof(*callback), GFP_ATOMIC);
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if (!callback) {
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return -ENOMEM;
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}
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callback->hsdev = hsdev;
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callback->usage_callback = usage_callback;
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callback->usage_id = usage_id;
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callback->priv = NULL;
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/*
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* If there is a handler registered for the collection type, then
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* it will handle all reports for sensors in this collection. If
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* there is also an individual sensor handler registration, then
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* we want to make sure that the reports are directed to collection
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* handler, as this may be a fusion sensor. So add collection handlers
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* to the beginning of the list, so that they are matched first.
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*/
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if (usage_id == HID_USAGE_SENSOR_COLLECTION)
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list_add(&callback->list, &pdata->dyn_callback_list);
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else
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list_add_tail(&callback->list, &pdata->dyn_callback_list);
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
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int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
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u32 usage_id)
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{
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struct hid_sensor_hub_callbacks_list *callback;
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struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
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unsigned long flags;
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spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
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list_for_each_entry(callback, &pdata->dyn_callback_list, list)
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if (callback->usage_id == usage_id &&
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callback->hsdev == hsdev) {
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list_del(&callback->list);
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kfree(callback);
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break;
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}
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return 0;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
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int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
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u32 field_index, int buffer_size, void *buffer)
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{
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struct hid_report *report;
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struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
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__s32 *buf32 = buffer;
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int i = 0;
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int remaining_bytes;
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__s32 value;
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int ret = 0;
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mutex_lock(&data->mutex);
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report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
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if (!report || (field_index >= report->maxfield)) {
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ret = -EINVAL;
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goto done_proc;
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}
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remaining_bytes = buffer_size % sizeof(__s32);
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buffer_size = buffer_size / sizeof(__s32);
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if (buffer_size) {
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for (i = 0; i < buffer_size; ++i) {
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hid_set_field(report->field[field_index], i,
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(__force __s32)cpu_to_le32(*buf32));
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++buf32;
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}
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}
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if (remaining_bytes) {
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value = 0;
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memcpy(&value, (u8 *)buf32, remaining_bytes);
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hid_set_field(report->field[field_index], i,
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(__force __s32)cpu_to_le32(value));
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}
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hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
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hid_hw_wait(hsdev->hdev);
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done_proc:
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mutex_unlock(&data->mutex);
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return ret;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
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int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
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u32 field_index, int buffer_size, void *buffer)
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{
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struct hid_report *report;
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struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
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int report_size;
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int ret = 0;
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u8 *val_ptr;
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int buffer_index = 0;
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int i;
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memset(buffer, 0, buffer_size);
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mutex_lock(&data->mutex);
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report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
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if (!report || (field_index >= report->maxfield) ||
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report->field[field_index]->report_count < 1) {
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ret = -EINVAL;
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goto done_proc;
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}
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hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
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hid_hw_wait(hsdev->hdev);
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/* calculate number of bytes required to read this field */
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report_size = DIV_ROUND_UP(report->field[field_index]->report_size,
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8) *
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report->field[field_index]->report_count;
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if (!report_size) {
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ret = -EINVAL;
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goto done_proc;
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}
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ret = min(report_size, buffer_size);
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val_ptr = (u8 *)report->field[field_index]->value;
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for (i = 0; i < report->field[field_index]->report_count; ++i) {
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if (buffer_index >= ret)
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break;
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memcpy(&((u8 *)buffer)[buffer_index], val_ptr,
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report->field[field_index]->report_size / 8);
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val_ptr += sizeof(__s32);
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buffer_index += (report->field[field_index]->report_size / 8);
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}
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done_proc:
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mutex_unlock(&data->mutex);
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return ret;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
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int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
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u32 usage_id,
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u32 attr_usage_id, u32 report_id,
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enum sensor_hub_read_flags flag,
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bool is_signed)
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{
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struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
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unsigned long flags;
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struct hid_report *report;
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int ret_val = 0;
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report = sensor_hub_report(report_id, hsdev->hdev,
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HID_INPUT_REPORT);
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if (!report)
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return -EINVAL;
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mutex_lock(hsdev->mutex_ptr);
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if (flag == SENSOR_HUB_SYNC) {
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memset(&hsdev->pending, 0, sizeof(hsdev->pending));
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init_completion(&hsdev->pending.ready);
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hsdev->pending.usage_id = usage_id;
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hsdev->pending.attr_usage_id = attr_usage_id;
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hsdev->pending.raw_size = 0;
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spin_lock_irqsave(&data->lock, flags);
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hsdev->pending.status = true;
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spin_unlock_irqrestore(&data->lock, flags);
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}
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mutex_lock(&data->mutex);
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hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
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mutex_unlock(&data->mutex);
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if (flag == SENSOR_HUB_SYNC) {
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wait_for_completion_interruptible_timeout(
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&hsdev->pending.ready, HZ*5);
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switch (hsdev->pending.raw_size) {
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case 1:
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if (is_signed)
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ret_val = *(s8 *)hsdev->pending.raw_data;
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else
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ret_val = *(u8 *)hsdev->pending.raw_data;
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break;
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case 2:
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if (is_signed)
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ret_val = *(s16 *)hsdev->pending.raw_data;
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else
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ret_val = *(u16 *)hsdev->pending.raw_data;
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break;
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case 4:
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ret_val = *(u32 *)hsdev->pending.raw_data;
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break;
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default:
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ret_val = 0;
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}
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kfree(hsdev->pending.raw_data);
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hsdev->pending.status = false;
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}
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mutex_unlock(hsdev->mutex_ptr);
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return ret_val;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
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int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev,
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u32 report_id, int field_index, u32 usage_id)
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{
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struct hid_report *report;
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struct hid_field *field;
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int i;
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report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
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if (!report || (field_index >= report->maxfield))
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goto done_proc;
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field = report->field[field_index];
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for (i = 0; i < field->maxusage; ++i) {
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if (field->usage[i].hid == usage_id)
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return field->usage[i].usage_index;
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}
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done_proc:
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return -EINVAL;
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}
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EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index);
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int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
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u8 type,
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u32 usage_id,
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u32 attr_usage_id,
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struct hid_sensor_hub_attribute_info *info)
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{
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int ret = -1;
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int i;
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struct hid_report *report;
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struct hid_field *field;
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struct hid_report_enum *report_enum;
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struct hid_device *hdev = hsdev->hdev;
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/* Initialize with defaults */
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info->usage_id = usage_id;
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info->attrib_id = attr_usage_id;
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info->report_id = -1;
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info->index = -1;
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info->units = -1;
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info->unit_expo = -1;
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report_enum = &hdev->report_enum[type];
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list_for_each_entry(report, &report_enum->report_list, list) {
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for (i = 0; i < report->maxfield; ++i) {
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field = report->field[i];
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if (field->maxusage) {
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if (field->physical == usage_id &&
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(field->logical == attr_usage_id ||
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field->usage[0].hid ==
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attr_usage_id) &&
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(field->usage[0].collection_index >=
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hsdev->start_collection_index) &&
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(field->usage[0].collection_index <
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hsdev->end_collection_index)) {
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sensor_hub_fill_attr_info(info, i,
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report->id,
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field);
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ret = 0;
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break;
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}
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}
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}
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}
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return ret;
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}
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EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
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#ifdef CONFIG_PM
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static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
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{
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struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
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struct hid_sensor_hub_callbacks_list *callback;
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unsigned long flags;
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hid_dbg(hdev, " sensor_hub_suspend\n");
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spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
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list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
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if (callback->usage_callback->suspend)
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callback->usage_callback->suspend(
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callback->hsdev, callback->priv);
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}
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return 0;
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}
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static int sensor_hub_resume(struct hid_device *hdev)
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{
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struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
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struct hid_sensor_hub_callbacks_list *callback;
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unsigned long flags;
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hid_dbg(hdev, " sensor_hub_resume\n");
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spin_lock_irqsave(&pdata->dyn_callback_lock, flags);
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list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
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if (callback->usage_callback->resume)
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callback->usage_callback->resume(
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callback->hsdev, callback->priv);
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}
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spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags);
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return 0;
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}
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static int sensor_hub_reset_resume(struct hid_device *hdev)
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{
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return 0;
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}
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#endif
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/*
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* Handle raw report as sent by device
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*/
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static int sensor_hub_raw_event(struct hid_device *hdev,
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struct hid_report *report, u8 *raw_data, int size)
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{
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int i;
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u8 *ptr;
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int sz;
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struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
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unsigned long flags;
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struct hid_sensor_hub_callbacks *callback = NULL;
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struct hid_collection *collection = NULL;
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void *priv = NULL;
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struct hid_sensor_hub_device *hsdev = NULL;
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hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
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report->id, size, report->type);
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hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
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if (report->type != HID_INPUT_REPORT)
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return 1;
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ptr = raw_data;
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if (report->id)
|
|
ptr++; /* Skip report id */
|
|
|
|
spin_lock_irqsave(&pdata->lock, flags);
|
|
|
|
for (i = 0; i < report->maxfield; ++i) {
|
|
hid_dbg(hdev, "%d collection_index:%x hid:%x sz:%x\n",
|
|
i, report->field[i]->usage->collection_index,
|
|
report->field[i]->usage->hid,
|
|
(report->field[i]->report_size *
|
|
report->field[i]->report_count)/8);
|
|
sz = (report->field[i]->report_size *
|
|
report->field[i]->report_count)/8;
|
|
collection = &hdev->collection[
|
|
report->field[i]->usage->collection_index];
|
|
hid_dbg(hdev, "collection->usage %x\n",
|
|
collection->usage);
|
|
|
|
callback = sensor_hub_get_callback(hdev,
|
|
report->field[i]->physical,
|
|
report->field[i]->usage[0].collection_index,
|
|
&hsdev, &priv);
|
|
if (!callback) {
|
|
ptr += sz;
|
|
continue;
|
|
}
|
|
if (hsdev->pending.status && (hsdev->pending.attr_usage_id ==
|
|
report->field[i]->usage->hid ||
|
|
hsdev->pending.attr_usage_id ==
|
|
report->field[i]->logical)) {
|
|
hid_dbg(hdev, "data was pending ...\n");
|
|
hsdev->pending.raw_data = kmemdup(ptr, sz, GFP_ATOMIC);
|
|
if (hsdev->pending.raw_data)
|
|
hsdev->pending.raw_size = sz;
|
|
else
|
|
hsdev->pending.raw_size = 0;
|
|
complete(&hsdev->pending.ready);
|
|
}
|
|
if (callback->capture_sample) {
|
|
if (report->field[i]->logical)
|
|
callback->capture_sample(hsdev,
|
|
report->field[i]->logical, sz, ptr,
|
|
callback->pdev);
|
|
else
|
|
callback->capture_sample(hsdev,
|
|
report->field[i]->usage->hid, sz, ptr,
|
|
callback->pdev);
|
|
}
|
|
ptr += sz;
|
|
}
|
|
if (callback && collection && callback->send_event)
|
|
callback->send_event(hsdev, collection->usage,
|
|
callback->pdev);
|
|
spin_unlock_irqrestore(&pdata->lock, flags);
|
|
|
|
return 1;
|
|
}
|
|
|
|
int sensor_hub_device_open(struct hid_sensor_hub_device *hsdev)
|
|
{
|
|
int ret = 0;
|
|
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
|
|
|
|
mutex_lock(&data->mutex);
|
|
if (!data->ref_cnt) {
|
|
ret = hid_hw_open(hsdev->hdev);
|
|
if (ret) {
|
|
hid_err(hsdev->hdev, "failed to open hid device\n");
|
|
mutex_unlock(&data->mutex);
|
|
return ret;
|
|
}
|
|
}
|
|
data->ref_cnt++;
|
|
mutex_unlock(&data->mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(sensor_hub_device_open);
|
|
|
|
void sensor_hub_device_close(struct hid_sensor_hub_device *hsdev)
|
|
{
|
|
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
|
|
|
|
mutex_lock(&data->mutex);
|
|
data->ref_cnt--;
|
|
if (!data->ref_cnt)
|
|
hid_hw_close(hsdev->hdev);
|
|
mutex_unlock(&data->mutex);
|
|
}
|
|
EXPORT_SYMBOL_GPL(sensor_hub_device_close);
|
|
|
|
static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
|
|
unsigned int *rsize)
|
|
{
|
|
/*
|
|
* Checks if the report descriptor of Thinkpad Helix 2 has a logical
|
|
* minimum for magnetic flux axis greater than the maximum.
|
|
*/
|
|
if (hdev->product == USB_DEVICE_ID_TEXAS_INSTRUMENTS_LENOVO_YOGA &&
|
|
*rsize == 2558 && rdesc[913] == 0x17 && rdesc[914] == 0x40 &&
|
|
rdesc[915] == 0x81 && rdesc[916] == 0x08 &&
|
|
rdesc[917] == 0x00 && rdesc[918] == 0x27 &&
|
|
rdesc[921] == 0x07 && rdesc[922] == 0x00) {
|
|
/* Sets negative logical minimum for mag x, y and z */
|
|
rdesc[914] = rdesc[935] = rdesc[956] = 0xc0;
|
|
rdesc[915] = rdesc[936] = rdesc[957] = 0x7e;
|
|
rdesc[916] = rdesc[937] = rdesc[958] = 0xf7;
|
|
rdesc[917] = rdesc[938] = rdesc[959] = 0xff;
|
|
}
|
|
|
|
return rdesc;
|
|
}
|
|
|
|
static int sensor_hub_probe(struct hid_device *hdev,
|
|
const struct hid_device_id *id)
|
|
{
|
|
int ret;
|
|
struct sensor_hub_data *sd;
|
|
int i;
|
|
char *name;
|
|
int dev_cnt;
|
|
struct hid_sensor_hub_device *hsdev;
|
|
struct hid_sensor_hub_device *last_hsdev = NULL;
|
|
struct hid_sensor_hub_device *collection_hsdev = NULL;
|
|
|
|
sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
|
|
if (!sd) {
|
|
hid_err(hdev, "cannot allocate Sensor data\n");
|
|
return -ENOMEM;
|
|
}
|
|
|
|
hid_set_drvdata(hdev, sd);
|
|
sd->quirks = id->driver_data;
|
|
|
|
spin_lock_init(&sd->lock);
|
|
spin_lock_init(&sd->dyn_callback_lock);
|
|
mutex_init(&sd->mutex);
|
|
ret = hid_parse(hdev);
|
|
if (ret) {
|
|
hid_err(hdev, "parse failed\n");
|
|
return ret;
|
|
}
|
|
INIT_LIST_HEAD(&hdev->inputs);
|
|
|
|
ret = hid_hw_start(hdev, 0);
|
|
if (ret) {
|
|
hid_err(hdev, "hw start failed\n");
|
|
return ret;
|
|
}
|
|
INIT_LIST_HEAD(&sd->dyn_callback_list);
|
|
sd->hid_sensor_client_cnt = 0;
|
|
|
|
dev_cnt = sensor_hub_get_physical_device_count(hdev);
|
|
if (dev_cnt > HID_MAX_PHY_DEVICES) {
|
|
hid_err(hdev, "Invalid Physical device count\n");
|
|
ret = -EINVAL;
|
|
goto err_stop_hw;
|
|
}
|
|
sd->hid_sensor_hub_client_devs = devm_kcalloc(&hdev->dev,
|
|
dev_cnt,
|
|
sizeof(struct mfd_cell),
|
|
GFP_KERNEL);
|
|
if (sd->hid_sensor_hub_client_devs == NULL) {
|
|
hid_err(hdev, "Failed to allocate memory for mfd cells\n");
|
|
ret = -ENOMEM;
|
|
goto err_stop_hw;
|
|
}
|
|
|
|
for (i = 0; i < hdev->maxcollection; ++i) {
|
|
struct hid_collection *collection = &hdev->collection[i];
|
|
|
|
if (collection->type == HID_COLLECTION_PHYSICAL ||
|
|
collection->type == HID_COLLECTION_APPLICATION) {
|
|
|
|
hsdev = devm_kzalloc(&hdev->dev, sizeof(*hsdev),
|
|
GFP_KERNEL);
|
|
if (!hsdev) {
|
|
hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
|
|
ret = -ENOMEM;
|
|
goto err_stop_hw;
|
|
}
|
|
hsdev->hdev = hdev;
|
|
hsdev->vendor_id = hdev->vendor;
|
|
hsdev->product_id = hdev->product;
|
|
hsdev->usage = collection->usage;
|
|
hsdev->mutex_ptr = devm_kzalloc(&hdev->dev,
|
|
sizeof(struct mutex),
|
|
GFP_KERNEL);
|
|
if (!hsdev->mutex_ptr) {
|
|
ret = -ENOMEM;
|
|
goto err_stop_hw;
|
|
}
|
|
mutex_init(hsdev->mutex_ptr);
|
|
hsdev->start_collection_index = i;
|
|
if (last_hsdev)
|
|
last_hsdev->end_collection_index = i;
|
|
last_hsdev = hsdev;
|
|
name = devm_kasprintf(&hdev->dev, GFP_KERNEL,
|
|
"HID-SENSOR-%x",
|
|
collection->usage);
|
|
if (name == NULL) {
|
|
hid_err(hdev, "Failed MFD device name\n");
|
|
ret = -ENOMEM;
|
|
goto err_stop_hw;
|
|
}
|
|
sd->hid_sensor_hub_client_devs[
|
|
sd->hid_sensor_client_cnt].name = name;
|
|
sd->hid_sensor_hub_client_devs[
|
|
sd->hid_sensor_client_cnt].platform_data =
|
|
hsdev;
|
|
sd->hid_sensor_hub_client_devs[
|
|
sd->hid_sensor_client_cnt].pdata_size =
|
|
sizeof(*hsdev);
|
|
hid_dbg(hdev, "Adding %s:%d\n", name,
|
|
hsdev->start_collection_index);
|
|
sd->hid_sensor_client_cnt++;
|
|
if (collection_hsdev)
|
|
collection_hsdev->end_collection_index = i;
|
|
if (collection->type == HID_COLLECTION_APPLICATION &&
|
|
collection->usage == HID_USAGE_SENSOR_COLLECTION)
|
|
collection_hsdev = hsdev;
|
|
}
|
|
}
|
|
if (last_hsdev)
|
|
last_hsdev->end_collection_index = i;
|
|
if (collection_hsdev)
|
|
collection_hsdev->end_collection_index = i;
|
|
|
|
ret = mfd_add_hotplug_devices(&hdev->dev,
|
|
sd->hid_sensor_hub_client_devs,
|
|
sd->hid_sensor_client_cnt);
|
|
if (ret < 0)
|
|
goto err_stop_hw;
|
|
|
|
return ret;
|
|
|
|
err_stop_hw:
|
|
hid_hw_stop(hdev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void sensor_hub_remove(struct hid_device *hdev)
|
|
{
|
|
struct sensor_hub_data *data = hid_get_drvdata(hdev);
|
|
unsigned long flags;
|
|
int i;
|
|
|
|
hid_dbg(hdev, " hardware removed\n");
|
|
hid_hw_close(hdev);
|
|
hid_hw_stop(hdev);
|
|
spin_lock_irqsave(&data->lock, flags);
|
|
for (i = 0; i < data->hid_sensor_client_cnt; ++i) {
|
|
struct hid_sensor_hub_device *hsdev =
|
|
data->hid_sensor_hub_client_devs[i].platform_data;
|
|
if (hsdev->pending.status)
|
|
complete(&hsdev->pending.ready);
|
|
}
|
|
spin_unlock_irqrestore(&data->lock, flags);
|
|
mfd_remove_devices(&hdev->dev);
|
|
mutex_destroy(&data->mutex);
|
|
}
|
|
|
|
static const struct hid_device_id sensor_hub_devices[] = {
|
|
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, HID_ANY_ID,
|
|
HID_ANY_ID) },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
|
|
|
|
static struct hid_driver sensor_hub_driver = {
|
|
.name = "hid-sensor-hub",
|
|
.id_table = sensor_hub_devices,
|
|
.probe = sensor_hub_probe,
|
|
.remove = sensor_hub_remove,
|
|
.raw_event = sensor_hub_raw_event,
|
|
.report_fixup = sensor_hub_report_fixup,
|
|
#ifdef CONFIG_PM
|
|
.suspend = sensor_hub_suspend,
|
|
.resume = sensor_hub_resume,
|
|
.reset_resume = sensor_hub_reset_resume,
|
|
#endif
|
|
};
|
|
module_hid_driver(sensor_hub_driver);
|
|
|
|
MODULE_DESCRIPTION("HID Sensor Hub driver");
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@intel.com>");
|
|
MODULE_LICENSE("GPL");
|