On Wed, 5 Sep 2012, Srinivas Pandruvada wrote:
> From: srinivas pandruvada <srinivas.pandruvada@xxxxxxxxx>
>
> Adding processing for HID Sensor usage table as defined by
> HID 1.12, Request #: HUTRR39, dated 05 May, 2011.
> This driver uses HID driver framework to register, send and
> receive events.
> This uses MFD framework, so that actual processing for a
> specific usage id can be done in a different driver. For
> example an accelerometer driver can be a separate driver and
> use the interface provided by this driver to register for
> events.
>
> Signed-off-by: srinivas pandruvada <srinivas.pandruvada@xxxxxxxxx>
Signed-off-by: Jiri Kosina <jkosina@xxxxxxx>
> ---
> drivers/hid/Kconfig | 14 +
> drivers/hid/Makefile | 1 +
> drivers/hid/hid-sensor-hub.c | 695 +++++++++++++++++++++++++++++++++++++++++
> include/linux/hid-sensor-hub.h | 160 ++++++++++
> include/linux/hid-sensor-ids.h | 112 +++++++
> 5 files changed, 982 insertions(+)
> create mode 100644 drivers/hid/hid-sensor-hub.c
> create mode 100644 include/linux/hid-sensor-hub.h
> create mode 100644 include/linux/hid-sensor-ids.h
>
> diff --git a/drivers/hid/Kconfig b/drivers/hid/Kconfig
> index fbf4950..f8d3140 100644
> --- a/drivers/hid/Kconfig
> +++ b/drivers/hid/Kconfig
> @@ -690,6 +690,20 @@ config HID_ZYDACRON
> ---help---
> Support for Zydacron remote control.
>
> +config HID_SENSOR_HUB
> + tristate "HID Sensors framework support"
> + depends on USB_HID
> + select MFD_CORE
> + default n
> + -- help---
> + Support for HID Sensor framework. This creates a MFD instance
> + for a sensor hub and identifies all the sensors connected to it.
> + Each sensor is registered as a MFD cell, so that sensor specific
> + processing can be done in a separate driver. Each sensor
> + drivers can use the service provided by this driver to register
> + for events and handle data streams. Each sensor driver can format
> + data and present to user mode using input or IIO interface.
> +
> endmenu
>
> endif # HID
> diff --git a/drivers/hid/Makefile b/drivers/hid/Makefile
> index f975485..1173d7a 100644
> --- a/drivers/hid/Makefile
> +++ b/drivers/hid/Makefile
> @@ -91,6 +91,7 @@ obj-$(CONFIG_HID_ZYDACRON) += hid-zydacron.o
> obj-$(CONFIG_HID_WACOM) += hid-wacom.o
> obj-$(CONFIG_HID_WALTOP) += hid-waltop.o
> obj-$(CONFIG_HID_WIIMOTE) += hid-wiimote.o
> +obj-$(CONFIG_HID_SENSOR_HUB) += hid-sensor-hub.o
>
> obj-$(CONFIG_USB_HID) += usbhid/
> obj-$(CONFIG_USB_MOUSE) += usbhid/
> diff --git a/drivers/hid/hid-sensor-hub.c b/drivers/hid/hid-sensor-hub.c
> new file mode 100644
> index 0000000..34a35ba
> --- /dev/null
> +++ b/drivers/hid/hid-sensor-hub.c
> @@ -0,0 +1,695 @@
> +/*
> + * HID Sensors Driver
> + * Copyright (c) 2012, Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + */
> +#include <linux/device.h>
> +#include <linux/hid.h>
> +#include <linux/usb.h>
> +#include "usbhid/usbhid.h"
> +#include <linux/module.h>
> +#include <linux/slab.h>
> +#include <linux/mfd/core.h>
> +#include <linux/list.h>
> +#include <linux/hid-sensor-ids.h>
> +#include <linux/hid-sensor-hub.h>
> +#include "hid-ids.h"
> +
> +/**
> + * struct sensor_hub_pending - Synchronous read pending information
> + * @status: Pending status true/false.
> + * @ready: Completion synchronization data.
> + * @usage_id: Usage id for physical device, E.g. Gyro usage id.
> + * @attr_usage_id: Usage Id of a field, E.g. X-AXIS for a gyro.
> + * @raw_size: Response size for a read request.
> + * @raw_data: Place holder for received response.
> + */
> +struct sensor_hub_pending {
> + bool status;
> + struct completion ready;
> + u32 usage_id;
> + u32 attr_usage_id;
> + int raw_size;
> + u8 *raw_data;
> +};
> +
> +/**
> + * struct sensor_hub_data - Hold a instance data for a HID hub device
> + * @hsdev: Stored hid instance for current hub device.
> + * @mutex: Mutex to serialize synchronous request.
> + * @lock: Spin lock to protect pending request structure.
> + * @pending: Holds information of pending sync read request.
> + * @dyn_callback_list: Holds callback function
> + * @dyn_callback_lock: spin lock to protect callback list
> + * @hid_sensor_hub_client_devs: Stores all MFD cells for a hub instance.
> + * @hid_sensor_client_cnt: Number of MFD cells, (no of sensors attached).
> + */
> +struct sensor_hub_data {
> + struct hid_sensor_hub_device *hsdev;
> + struct mutex mutex;
> + spinlock_t lock;
> + struct sensor_hub_pending pending;
> + struct list_head dyn_callback_list;
> + spinlock_t dyn_callback_lock;
> + struct mfd_cell *hid_sensor_hub_client_devs;
> + int hid_sensor_client_cnt;
> +};
> +
> +/**
> + * struct hid_sensor_hub_callbacks_list - Stores callback list
> + * @list: list head.
> + * @usage_id: usage id for a physical device.
> + * @usage_callback: Stores registered callback functions.
> + * @priv: Private data for a physical device.
> + */
> +struct hid_sensor_hub_callbacks_list {
> + struct list_head list;
> + u32 usage_id;
> + struct hid_sensor_hub_callbacks *usage_callback;
> + void *priv;
> +};
> +
> +static int sensor_hub_check_for_sensor_page(struct hid_device *hdev)
> +{
> + int i;
> + int ret = -EINVAL;
> +
> + for (i = 0; i < hdev->maxcollection; i++) {
> + struct hid_collection *col = &hdev->collection[i];
> + if (col->type == HID_COLLECTION_PHYSICAL &&
> + (col->usage & HID_USAGE_PAGE) == HID_UP_SENSOR) {
> + ret = 0;
> + break;
> + }
> + }
> +
> + return ret;
> +}
> +
> +static struct hid_report *sensor_hub_report(int id, struct hid_device *hdev,
> + int dir)
> +{
> + struct hid_report *report;
> +
> + list_for_each_entry(report, &hdev->report_enum[dir].report_list, list) {
> + if (report->id == id)
> + return report;
> + }
> + hid_warn(hdev, "No report with id 0x%x found\n", id);
> +
> + return NULL;
> +}
> +
> +static int sensor_hub_get_physical_device_count(
> + struct hid_report_enum *report_enum)
> +{
> + struct hid_report *report;
> + struct hid_field *field;
> + int cnt = 0;
> +
> + list_for_each_entry(report, &report_enum->report_list, list) {
> + field = report->field[0];
> + if (report->maxfield && field &&
> + field->physical)
> + cnt++;
> + }
> +
> + return cnt;
> +}
> +
> +static void sensor_hub_fill_attr_info(
> + struct hid_sensor_hub_attribute_info *info,
> + s32 index, s32 report_id, s32 units, s32 unit_expo, s32 size)
> +{
> + info->index = index;
> + info->report_id = report_id;
> + info->units = units;
> + info->unit_expo = unit_expo;
> + info->size = size/8;
> +}
> +
> +static struct hid_sensor_hub_callbacks *sensor_hub_get_callback(
> + struct hid_device *hdev,
> + u32 usage_id, void **priv)
> +{
> + struct hid_sensor_hub_callbacks_list *callback;
> + struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
> +
> + spin_lock(&pdata->dyn_callback_lock);
> + list_for_each_entry(callback, &pdata->dyn_callback_list, list)
> + if (callback->usage_id == usage_id) {
> + *priv = callback->priv;
> + spin_unlock(&pdata->dyn_callback_lock);
> + return callback->usage_callback;
> + }
> + spin_unlock(&pdata->dyn_callback_lock);
> +
> + return NULL;
> +}
> +
> +int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id,
> + struct hid_sensor_hub_callbacks *usage_callback)
> +{
> + struct hid_sensor_hub_callbacks_list *callback;
> + struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
> +
> + spin_lock(&pdata->dyn_callback_lock);
> + list_for_each_entry(callback, &pdata->dyn_callback_list, list)
> + if (callback->usage_id == usage_id) {
> + spin_unlock(&pdata->dyn_callback_lock);
> + return -EINVAL;
> + }
> + callback = kzalloc(sizeof(*callback), GFP_KERNEL);
> + if (!callback) {
> + spin_unlock(&pdata->dyn_callback_lock);
> + return -ENOMEM;
> + }
> + callback->usage_callback = usage_callback;
> + callback->usage_id = usage_id;
> + callback->priv = NULL;
> + list_add_tail(&callback->list, &pdata->dyn_callback_list);
> + spin_unlock(&pdata->dyn_callback_lock);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_register_callback);
> +
> +int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id)
> +{
> + struct hid_sensor_hub_callbacks_list *callback;
> + struct sensor_hub_data *pdata = hid_get_drvdata(hsdev->hdev);
> +
> + spin_lock(&pdata->dyn_callback_lock);
> + list_for_each_entry(callback, &pdata->dyn_callback_list, list)
> + if (callback->usage_id == usage_id) {
> + list_del(&callback->list);
> + kfree(callback);
> + break;
> + }
> + spin_unlock(&pdata->dyn_callback_lock);
> +
> + return 0;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_remove_callback);
> +
> +int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
> + u32 field_index, s32 value)
> +{
> + struct hid_report *report;
> + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
> + int ret = 0;
> +
> + if (report_id < 0)
> + return -EINVAL;
> +
> + mutex_lock(&data->mutex);
> + report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
> + if (!report || (field_index >= report->maxfield)) {
> + ret = -EINVAL;
> + goto done_proc;
> + }
> + hid_set_field(report->field[field_index], 0, value);
> + usbhid_submit_report(hsdev->hdev, report, USB_DIR_OUT);
> + usbhid_wait_io(hsdev->hdev);
> +
> +done_proc:
> + mutex_unlock(&data->mutex);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_set_feature);
> +
> +int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
> + u32 field_index, s32 *value)
> +{
> + struct hid_report *report;
> + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
> + int ret = 0;
> +
> + if (report_id < 0)
> + return -EINVAL;
> +
> + mutex_lock(&data->mutex);
> + report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
> + if (!report || (field_index >= report->maxfield)) {
> + ret = -EINVAL;
> + goto done_proc;
> + }
> + usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
> + usbhid_wait_io(hsdev->hdev);
> + *value = report->field[field_index]->value[0];
> +
> +done_proc:
> + mutex_unlock(&data->mutex);
> +
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_get_feature);
> +
> +
> +int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id,
> + u32 attr_usage_id, u32 report_id)
> +{
> + struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev);
> + unsigned long flags;
> + struct hid_report *report;
> + int ret_val = 0;
> +
> + if (report_id < 0)
> + return -EINVAL;
> +
> + mutex_lock(&data->mutex);
> + memset(&data->pending, 0, sizeof(data->pending));
> + init_completion(&data->pending.ready);
> + data->pending.usage_id = usage_id;
> + data->pending.attr_usage_id = attr_usage_id;
> + data->pending.raw_size = 0;
> +
> + spin_lock_irqsave(&data->lock, flags);
> + data->pending.status = true;
> + report = sensor_hub_report(report_id, hsdev->hdev, HID_INPUT_REPORT);
> + if (!report) {
> + spin_unlock_irqrestore(&data->lock, flags);
> + goto err_free;
> + }
> + usbhid_submit_report(hsdev->hdev, report, USB_DIR_IN);
> + spin_unlock_irqrestore(&data->lock, flags);
> + wait_for_completion_interruptible_timeout(&data->pending.ready, HZ*5);
> + switch (data->pending.raw_size) {
> + case 1:
> + ret_val = *(u8 *)data->pending.raw_data;
> + break;
> + case 2:
> + ret_val = *(u16 *)data->pending.raw_data;
> + break;
> + case 4:
> + ret_val = *(u32 *)data->pending.raw_data;
> + break;
> + default:
> + ret_val = 0;
> + }
> + kfree(data->pending.raw_data);
> +
> +err_free:
> + data->pending.status = false;
> + mutex_unlock(&data->mutex);
> +
> + return ret_val;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value);
> +
> +int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
> + u8 type,
> + u32 usage_id,
> + u32 attr_usage_id,
> + struct hid_sensor_hub_attribute_info *info)
> +{
> + int ret = -1;
> + int i, j;
> + int collection_index = -1;
> + struct hid_report *report;
> + struct hid_field *field;
> + struct hid_report_enum *report_enum;
> + struct hid_device *hdev = hsdev->hdev;
> +
> + /* Initialize with defaults */
> + info->usage_id = usage_id;
> + info->attrib_id = attr_usage_id;
> + info->report_id = -1;
> + info->index = -1;
> + info->units = -1;
> + info->unit_expo = -1;
> +
> + for (i = 0; i < hdev->maxcollection; ++i) {
> + struct hid_collection *collection = &hdev->collection[i];
> + if (usage_id == collection->usage) {
> + collection_index = i;
> + break;
> + }
> + }
> + if (collection_index == -1)
> + goto err_ret;
> +
> + report_enum = &hdev->report_enum[type];
> + list_for_each_entry(report, &report_enum->report_list, list) {
> + for (i = 0; i < report->maxfield; ++i) {
> + field = report->field[i];
> + if (field->physical == usage_id &&
> + field->logical == attr_usage_id) {
> + sensor_hub_fill_attr_info(info, i, report->id,
> + field->unit, field->unit_exponent,
> + field->report_size);
> + ret = 0;
> + } else {
> + for (j = 0; j < field->maxusage; ++j) {
> + if (field->usage[j].hid ==
> + attr_usage_id &&
> + field->usage[j].collection_index ==
> + collection_index) {
> + sensor_hub_fill_attr_info(info,
> + i, report->id,
> + field->unit,
> + field->unit_exponent,
> + field->report_size);
> + ret = 0;
> + break;
> + }
> + }
> + }
> + if (ret == 0)
> + break;
> + }
> + }
> +
> +err_ret:
> + return ret;
> +}
> +EXPORT_SYMBOL_GPL(sensor_hub_input_get_attribute_info);
> +
> +#ifdef CONFIG_PM
> +static int sensor_hub_suspend(struct hid_device *hdev, pm_message_t message)
> +{
> + struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
> + struct hid_sensor_hub_callbacks_list *callback;
> +
> + hid_dbg(hdev, " sensor_hub_suspend\n");
> + spin_lock(&pdata->dyn_callback_lock);
> + list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
> + if (callback->usage_callback->suspend)
> + callback->usage_callback->suspend(
> + pdata->hsdev, callback->priv);
> + }
> + spin_unlock(&pdata->dyn_callback_lock);
> +
> + return 0;
> +}
> +
> +static int sensor_hub_resume(struct hid_device *hdev)
> +{
> + struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
> + struct hid_sensor_hub_callbacks_list *callback;
> +
> + hid_dbg(hdev, " sensor_hub_resume\n");
> + spin_lock(&pdata->dyn_callback_lock);
> + list_for_each_entry(callback, &pdata->dyn_callback_list, list) {
> + if (callback->usage_callback->resume)
> + callback->usage_callback->resume(
> + pdata->hsdev, callback->priv);
> + }
> + spin_unlock(&pdata->dyn_callback_lock);
> +
> + return 0;
> +}
> +
> +static int sensor_hub_reset_resume(struct hid_device *hdev)
> +{
> + return 0;
> +}
> +#endif
> +/*
> + * Handle raw report as sent by device
> + */
> +static int sensor_hub_raw_event(struct hid_device *hdev,
> + struct hid_report *report, u8 *raw_data, int size)
> +{
> + int i;
> + u8 *ptr;
> + int sz;
> + struct sensor_hub_data *pdata = hid_get_drvdata(hdev);
> + unsigned long flags;
> + struct hid_sensor_hub_callbacks *callback = NULL;
> + struct hid_collection *collection = NULL;
> + void *priv = NULL;
> +
> + hid_dbg(hdev, "sensor_hub_raw_event report id:0x%x size:%d type:%d\n",
> + report->id, size, report->type);
> + hid_dbg(hdev, "maxfield:%d\n", report->maxfield);
> + if (report->type != HID_INPUT_REPORT)
> + return 1;
> +
> + ptr = raw_data;
> + ptr++; /*Skip report id*/
> +
> + if (!report)
> + goto err_report;
> +
> + 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/8);
> +
> + sz = report->field[i]->report_size/8;
> + if (pdata->pending.status && pdata->pending.attr_usage_id ==
> + report->field[i]->usage->hid) {
> + hid_dbg(hdev, "data was pending ...\n");
> + pdata->pending.raw_data = kmalloc(sz, GFP_KERNEL);
> + if (pdata->pending.raw_data) {
> + memcpy(pdata->pending.raw_data, ptr, sz);
> + pdata->pending.raw_size = sz;
> + } else
> + pdata->pending.raw_size = 0;
> + complete(&pdata->pending.ready);
> + }
> + collection = &hdev->collection[
> + report->field[i]->usage->collection_index];
> + hid_dbg(hdev, "collection->usage %x\n",
> + collection->usage);
> + callback = sensor_hub_get_callback(pdata->hsdev->hdev,
> + report->field[i]->physical,
> + &priv);
> + if (callback && callback->capture_sample) {
> + if (report->field[i]->logical)
> + callback->capture_sample(pdata->hsdev,
> + report->field[i]->logical, sz, ptr,
> + callback->pdev);
> + else
> + callback->capture_sample(pdata->hsdev,
> + report->field[i]->usage->hid, sz, ptr,
> + callback->pdev);
> + }
> + ptr += sz;
> + }
> + if (callback && collection && callback->send_event)
> + callback->send_event(pdata->hsdev, collection->usage,
> + callback->pdev);
> + spin_unlock_irqrestore(&pdata->lock, flags);
> +
> +err_report:
> + return 1;
> +}
> +
> +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;
> + struct hid_report *report;
> + struct hid_report_enum *report_enum;
> + struct hid_field *field;
> + int dev_cnt;
> +
> + sd = kzalloc(sizeof(struct sensor_hub_data), GFP_KERNEL);
> + if (!sd) {
> + hid_err(hdev, "cannot allocate Sensor data\n");
> + return -ENOMEM;
> + }
> + sd->hsdev = kzalloc(sizeof(struct hid_sensor_hub_device), GFP_KERNEL);
> + if (!sd->hsdev) {
> + hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
> + ret = -ENOMEM;
> + goto err_free_hub;
> + }
> + hid_set_drvdata(hdev, sd);
> + sd->hsdev->hdev = hdev;
> + sd->hsdev->vendor_id = hdev->vendor;
> + sd->hsdev->product_id = hdev->product;
> + 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");
> + goto err_free;
> + }
> + if (sensor_hub_check_for_sensor_page(hdev) < 0) {
> + hid_err(hdev, "sensor page not found\n");
> + goto err_free;
> + }
> + INIT_LIST_HEAD(&hdev->inputs);
> +
> + hdev->claimed = HID_CLAIMED_INPUT;
> + ret = hid_hw_start(hdev, 0);
> + if (ret) {
> + hid_err(hdev, "hw start failed\n");
> + goto err_free;
> + }
> + ret = hid_hw_open(hdev);
> + if (ret) {
> + hid_err(hdev, "failed to open input interrupt pipe\n");
> + goto err_stop_hw;
> + }
> +
> + INIT_LIST_HEAD(&sd->dyn_callback_list);
> + sd->hid_sensor_client_cnt = 0;
> + report_enum = &hdev->report_enum[HID_INPUT_REPORT];
> +
> + dev_cnt = sensor_hub_get_physical_device_count(report_enum);
> + if (dev_cnt > HID_MAX_PHY_DEVICES) {
> + hid_err(hdev, "Invalid Physical device count\n");
> + ret = -EINVAL;
> + goto err_close;
> + }
> + sd->hid_sensor_hub_client_devs = kzalloc(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_close;
> + }
> + list_for_each_entry(report, &report_enum->report_list, list) {
> + hid_dbg(hdev, "Report id:%x\n", report->id);
> + field = report->field[0];
> + if (report->maxfield && field &&
> + field->physical) {
> + name = kasprintf(GFP_KERNEL, "HID-SENSOR-%x",
> + field->physical);
> + if (name == NULL) {
> + hid_err(hdev,
> + "Failed MFD device name\n");
> + ret = -ENOMEM;
> + goto err_free_cells;
> + }
> + 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 =
> + sd->hsdev;
> + sd->hid_sensor_hub_client_devs[
> + sd->hid_sensor_client_cnt].pdata_size =
> + sizeof(*sd->hsdev);
> + hid_dbg(hdev, "Adding %s:%p\n", name, sd);
> + sd->hid_sensor_client_cnt++;
> + }
> + }
> + ret = mfd_add_devices(&hdev->dev, 0, sd->hid_sensor_hub_client_devs,
> + sd->hid_sensor_client_cnt, NULL, 0);
> + if (ret < 0)
> + goto err_free_names;
> +
> + return ret;
> +
> +err_free_names:
> + for (i = 0; i < sd->hid_sensor_client_cnt ; ++i)
> + kfree(sd->hid_sensor_hub_client_devs[i].name);
> +err_free_cells:
> + kfree(sd->hid_sensor_hub_client_devs);
> +err_close:
> + hid_hw_stop(hdev);
> + hid_hw_close(hdev);
> +err_stop_hw:
> + hid_hw_stop(hdev);
> +err_free:
> + kfree(sd->hsdev);
> +err_free_hub:
> + kfree(sd);
> +
> + 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");
> + hdev->claimed &= ~HID_CLAIMED_INPUT;
> + hid_hw_stop(hdev);
> + hid_hw_close(hdev);
> + spin_lock_irqsave(&data->lock, flags);
> + if (data->pending.status)
> + complete(&data->pending.ready);
> + spin_unlock_irqrestore(&data->lock, flags);
> + mfd_remove_devices(&hdev->dev);
> + for (i = 0; i < data->hid_sensor_client_cnt ; ++i)
> + kfree(data->hid_sensor_hub_client_devs[i].name);
> + kfree(data->hid_sensor_hub_client_devs);
> + hid_set_drvdata(hdev, NULL);
> + mutex_destroy(&data->mutex);
> + kfree(data->hsdev);
> + kfree(data);
> +}
> +
> +static const struct hid_device_id sensor_hub_devices[] = {
> + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
> + USB_DEVICE_ID_SENSOR_HUB_1020) },
> + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
> + USB_DEVICE_ID_SENSOR_HUB_1020) },
> + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8086,
> + USB_DEVICE_ID_SENSOR_HUB_09FA) },
> + { HID_USB_DEVICE(USB_VENDOR_ID_INTEL_8087,
> + USB_DEVICE_ID_SENSOR_HUB_09FA) },
> + { HID_USB_DEVICE(USB_VENDOR_ID_STANTUM_STM,
> + USB_DEVICE_ID_SENSOR_HUB_7014) },
> + { }
> +};
> +MODULE_DEVICE_TABLE(hid, sensor_hub_devices);
> +
> +static const struct hid_usage_id sensor_hub_grabbed_usages[] = {
> + { HID_ANY_ID, HID_ANY_ID, HID_ANY_ID },
> + { HID_ANY_ID - 1, HID_ANY_ID - 1, HID_ANY_ID - 1 }
> +};
> +
> +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,
> +#ifdef CONFIG_PM
> + .suspend = sensor_hub_suspend,
> + .resume = sensor_hub_resume,
> + .reset_resume = sensor_hub_reset_resume,
> +#endif
> +};
> +
> +static int __init sensor_hub_init(void)
> +{
> + return hid_register_driver(&sensor_hub_driver);
> +}
> +
> +static void __exit sensor_hub_exit(void)
> +{
> + hid_unregister_driver(&sensor_hub_driver);
> +}
> +
> +module_init(sensor_hub_init);
> +module_exit(sensor_hub_exit);
> +
> +MODULE_DESCRIPTION("HID Sensor Hub driver");
> +MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@xxxxxxxxx>");
> +MODULE_LICENSE("GPL");
> diff --git a/include/linux/hid-sensor-hub.h b/include/linux/hid-sensor-hub.h
> new file mode 100644
> index 0000000..0aa5f4c
> --- /dev/null
> +++ b/include/linux/hid-sensor-hub.h
> @@ -0,0 +1,160 @@
> +/*
> + * HID Sensors Driver
> + * Copyright (c) 2012, Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + */
> +#ifndef _HID_SENSORS_HUB_H
> +#define _HID_SENSORS_HUB_H
> +
> +#include <linux/hid.h>
> +#include <linux/hid-sensor-ids.h>
> +
> +/**
> + * struct hid_sensor_hub_attribute_info - Attribute info
> + * @usage_id: Parent usage id of a physical device.
> + * @attrib_id: Attribute id for this attribute.
> + * @report_id: Report id in which this information resides.
> + * @index: Field index in the report.
> + * @units: Measurment unit for this attribute.
> + * @unit_expo: Exponent used in the data.
> + * @size: Size in bytes for data size.
> + */
> +struct hid_sensor_hub_attribute_info {
> + u32 usage_id;
> + u32 attrib_id;
> + s32 report_id;
> + s32 index;
> + s32 units;
> + s32 unit_expo;
> + s32 size;
> +};
> +
> +/**
> + * struct hid_sensor_hub_device - Stores the hub instance data
> + * @hdev: Stores the hid instance.
> + * @vendor_id: Vendor id of hub device.
> + * @product_id: Product id of hub device.
> + */
> +struct hid_sensor_hub_device {
> + struct hid_device *hdev;
> + u32 vendor_id;
> + u32 product_id;
> +};
> +
> +/**
> + * struct hid_sensor_hub_callbacks - Client callback functions
> + * @pdev: Platform device instance of the client driver.
> + * @suspend: Suspend callback.
> + * @resume: Resume callback.
> + * @capture_sample: Callback to get a sample.
> + * @send_event: Send notification to indicate all samples are
> + * captured, process and send event
> + */
> +struct hid_sensor_hub_callbacks {
> + struct platform_device *pdev;
> + int (*suspend)(struct hid_sensor_hub_device *hsdev, void *priv);
> + int (*resume)(struct hid_sensor_hub_device *hsdev, void *priv);
> + int (*capture_sample)(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id, size_t raw_len, char *raw_data,
> + void *priv);
> + int (*send_event)(struct hid_sensor_hub_device *hsdev, u32 usage_id,
> + void *priv);
> +};
> +
> +/* Registration functions */
> +
> +/**
> +* sensor_hub_register_callback() - Register client callbacks
> +* @hsdev: Hub device instance.
> +* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
> +* @usage_callback: Callback function storage
> +*
> +* Used to register callbacks by client processing drivers. Sensor
> +* hub core driver will call these callbacks to offload processing
> +* of data streams and notifications.
> +*/
> +int sensor_hub_register_callback(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id,
> + struct hid_sensor_hub_callbacks *usage_callback);
> +
> +/**
> +* sensor_hub_remove_callback() - Remove client callbacks
> +* @hsdev: Hub device instance.
> +* @usage_id: Usage id of the client (E.g. 0x200076 for Gyro).
> +*
> +* If there is a callback registred, this call will remove that
> +* callbacks, so that it will stop data and event notifications.
> +*/
> +int sensor_hub_remove_callback(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id);
> +
> +
> +/* Hid sensor hub core interfaces */
> +
> +/**
> +* sensor_hub_input_get_attribute_info() - Get an attribute information
> +* @hsdev: Hub device instance.
> +* @type: Type of this attribute, input/output/feature
> +* @usage_id: Attribute usage id of parent physical device as per spec
> +* @attr_usage_id: Attribute usage id as per spec
> +* @info: return information about attribute after parsing report
> +*
> +* Parses report and returns the attribute information such as report id,
> +* field index, units and exponet etc.
> +*/
> +int sensor_hub_input_get_attribute_info(struct hid_sensor_hub_device *hsdev,
> + u8 type,
> + u32 usage_id, u32 attr_usage_id,
> + struct hid_sensor_hub_attribute_info *info);
> +
> +/**
> +* sensor_hub_input_attr_get_raw_value() - Synchronous read request
> +* @usage_id: Attribute usage id of parent physical device as per spec
> +* @attr_usage_id: Attribute usage id as per spec
> +* @report_id: Report id to look for
> +*
> +* Issues a synchronous read request for an input attribute. Returns
> +* data upto 32 bits. Since client can get events, so this call should
> +* not be used for data paths, this will impact performance.
> +*/
> +
> +int sensor_hub_input_attr_get_raw_value(struct hid_sensor_hub_device *hsdev,
> + u32 usage_id,
> + u32 attr_usage_id, u32 report_id);
> +/**
> +* sensor_hub_set_feature() - Feature set request
> +* @report_id: Report id to look for
> +* @field_index: Field index inside a report
> +* @value: Value to set
> +*
> +* Used to set a field in feature report. For example this can set polling
> +* interval, sensitivity, activate/deactivate state.
> +*/
> +int sensor_hub_set_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
> + u32 field_index, s32 value);
> +
> +/**
> +* sensor_hub_get_feature() - Feature get request
> +* @report_id: Report id to look for
> +* @field_index: Field index inside a report
> +* @value: Place holder for return value
> +*
> +* Used to get a field in feature report. For example this can get polling
> +* interval, sensitivity, activate/deactivate state.
> +*/
> +int sensor_hub_get_feature(struct hid_sensor_hub_device *hsdev, u32 report_id,
> + u32 field_index, s32 *value);
> +#endif
> diff --git a/include/linux/hid-sensor-ids.h b/include/linux/hid-sensor-ids.h
> new file mode 100644
> index 0000000..ca8d7e9
> --- /dev/null
> +++ b/include/linux/hid-sensor-ids.h
> @@ -0,0 +1,112 @@
> +/*
> + * HID Sensors Driver
> + * Copyright (c) 2012, Intel Corporation.
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms and conditions of the GNU General Public License,
> + * version 2, as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope it will be useful, but WITHOUT
> + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
> + * more details.
> + *
> + * You should have received a copy of the GNU General Public License along with
> + * this program; if not, write to the Free Software Foundation, Inc.,
> + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
> + *
> + */
> +#ifndef _HID_SENSORS_IDS_H
> +#define _HID_SENSORS_IDS_H
> +
> +#define HID_UP_SENSOR 0x00200000
> +#define HID_MAX_PHY_DEVICES 0xFF
> +
> +/* Accel 3D (200073) */
> +#define HID_USAGE_SENSOR_ACCEL_3D 0x200073
> +#define HID_USAGE_SENSOR_ACCEL_X_AXIS 0x200453
> +#define HID_USAGE_SENSOR_ACCEL_Y_AXIS 0x200454
> +#define HID_USAGE_SENSOR_ACCEL_Z_AXIS 0x200455
> +
> +/* ALS (200041) */
> +#define HID_USAGE_SENSOR_ALS 0x200041
> +#define HID_USAGE_SENSOR_LIGHT_ILLUM 0x2004d1
> +
> +/* Gyro 3D: (200076) */
> +#define HID_USAGE_SENSOR_GYRO_3D 0x200076
> +#define HID_USAGE_SENSOR_ANGL_VELOCITY_X_AXIS 0x200457
> +#define HID_USAGE_SENSOR_ANGL_VELOCITY_Y_AXIS 0x200458
> +#define HID_USAGE_SENSOR_ANGL_VELOCITY_Z_AXIS 0x200459
> +
> +/*ORIENTATION: Compass 3D: (200083) */
> +#define HID_USAGE_SENSOR_COMPASS_3D 0x200083
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING 0x200471
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_X 0x200472
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_Y 0x200473
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_HEADING_Z 0x200474
> +
> +#define HID_USAGE_SENSOR_ORIENT_COMP_MAGN_NORTH 0x200475
> +#define HID_USAGE_SENSOR_ORIENT_COMP_TRUE_NORTH 0x200476
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_NORTH 0x200477
> +#define HID_USAGE_SENSOR_ORIENT_TRUE_NORTH 0x200478
> +
> +#define HID_USAGE_SENSOR_ORIENT_DISTANCE 0x200479
> +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_X 0x20047A
> +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_Y 0x20047B
> +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_Z 0x20047C
> +#define HID_USAGE_SENSOR_ORIENT_DISTANCE_OUT_OF_RANGE 0x20047D
> +#define HID_USAGE_SENSOR_ORIENT_TILT 0x20047E
> +#define HID_USAGE_SENSOR_ORIENT_TILT_X 0x20047F
> +#define HID_USAGE_SENSOR_ORIENT_TILT_Y 0x200480
> +#define HID_USAGE_SENSOR_ORIENT_TILT_Z 0x200481
> +#define HID_USAGE_SENSOR_ORIENT_ROTATION_MATRIX 0x200482
> +#define HID_USAGE_SENSOR_ORIENT_QUATERNION 0x200483
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX 0x200484
> +
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_X_AXIS 0x200485
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Y_AXIS 0x200486
> +#define HID_USAGE_SENSOR_ORIENT_MAGN_FLUX_Z_AXIS 0x200487
> +
> +/* Units */
> +#define HID_USAGE_SENSOR_UNITS_NOT_SPECIFIED 0x00
> +#define HID_USAGE_SENSOR_UNITS_LUX 0x01
> +#define HID_USAGE_SENSOR_UNITS_KELVIN 0x01000100
> +#define HID_USAGE_SENSOR_UNITS_FAHRENHEIT 0x03000100
> +#define HID_USAGE_SENSOR_UNITS_PASCAL 0xF1E1
> +#define HID_USAGE_SENSOR_UNITS_NEWTON 0x11E1
> +#define HID_USAGE_SENSOR_UNITS_METERS_PER_SECOND 0x11F0
> +#define HID_USAGE_SENSOR_UNITS_METERS_PER_SEC_SQRD 0x11E0
> +#define HID_USAGE_SENSOR_UNITS_FARAD 0xE14F2000
> +#define HID_USAGE_SENSOR_UNITS_AMPERE 0x01001000
> +#define HID_USAGE_SENSOR_UNITS_WATT 0x21d1
> +#define HID_USAGE_SENSOR_UNITS_HENRY 0x21E1E000
> +#define HID_USAGE_SENSOR_UNITS_OHM 0x21D1E000
> +#define HID_USAGE_SENSOR_UNITS_VOLT 0x21D1F000
> +#define HID_USAGE_SENSOR_UNITS_HERTZ 0x01F0
> +#define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SEC_SQRD 0x14E0
> +#define HID_USAGE_SENSOR_UNITS_RADIANS 0x12
> +#define HID_USAGE_SENSOR_UNITS_RADIANS_PER_SECOND 0x12F0
> +#define HID_USAGE_SENSOR_UNITS_RADIANS_PER_SEC_SQRD 0x12E0
> +#define HID_USAGE_SENSOR_UNITS_SECOND 0x0110
> +#define HID_USAGE_SENSOR_UNITS_GAUSS 0x01E1F000
> +#define HID_USAGE_SENSOR_UNITS_GRAM 0x0101
> +#define HID_USAGE_SENSOR_UNITS_CENTIMETER 0x11
> +#define HID_USAGE_SENSOR_UNITS_G 0x1A
> +#define HID_USAGE_SENSOR_UNITS_MILLISECOND 0x19
> +#define HID_USAGE_SENSOR_UNITS_PERCENT 0x17
> +#define HID_USAGE_SENSOR_UNITS_DEGREES 0x14
> +#define HID_USAGE_SENSOR_UNITS_DEGREES_PER_SECOND 0x15
> +
> +/* Common selectors */
> +#define HID_USAGE_SENSOR_PROP_REPORT_INTERVAL 0x20030E
> +#define HID_USAGE_SENSOR_PROP_SENSITIVITY_ABS 0x20030F
> +#define HID_USAGE_SENSOR_PROP_SENSITIVITY_RANGE_PCT 0x200310
> +#define HID_USAGE_SENSOR_PROP_SENSITIVITY_REL_PCT 0x200311
> +#define HID_USAGE_SENSOR_PROP_ACCURACY 0x200312
> +#define HID_USAGE_SENSOR_PROP_RESOLUTION 0x200313
> +#define HID_USAGE_SENSOR_PROP_RANGE_MAXIMUM 0x200314
> +#define HID_USAGE_SENSOR_PROP_RANGE_MINIMUM 0x200315
> +#define HID_USAGE_SENSOR_PROP_REPORT_STATE 0x200316
> +#define HID_USAGE_SENSOR_PROY_POWER_STATE 0x200319
> +
> +#endif
> --
> 1.7.11.4
>
--
Jiri Kosina
SUSE Labs
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