linux/drivers/hid/hid-sensor-hub.c

692 lines
19 KiB
C
Raw Normal View History

/*
* 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/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"
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
#define HID_SENSOR_HUB_ENUM_QUIRK 0x01
/**
* 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;
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
unsigned long quirks;
};
/**
* 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 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, struct hid_field *field)
{
info->index = index;
info->report_id = report_id;
info->units = field->unit;
info->unit_expo = field->unit_exponent;
info->size = (field->report_size * field->report_count)/8;
info->logical_minimum = field->logical_minimum;
info->logical_maximum = field->logical_maximum;
}
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_ATOMIC);
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;
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);
hid_hw_request(hsdev->hdev, report, HID_REQ_SET_REPORT);
hid_hw_wait(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;
mutex_lock(&data->mutex);
report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT);
if (!report || (field_index >= report->maxfield) ||
report->field[field_index]->report_count < 1) {
ret = -EINVAL;
goto done_proc;
}
hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
hid_hw_wait(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;
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;
}
hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT);
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);
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);
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 */
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;
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 = kmemdup(ptr, sz, GFP_ATOMIC);
if (pdata->pending.raw_data)
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);
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 (!hsdev->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;
}
}
hsdev->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);
hsdev->ref_cnt--;
if (!hsdev->ref_cnt)
hid_hw_close(hsdev->hdev);
mutex_unlock(&data->mutex);
}
EXPORT_SYMBOL_GPL(sensor_hub_device_close);
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
static __u8 *sensor_hub_report_fixup(struct hid_device *hdev, __u8 *rdesc,
unsigned int *rsize)
{
int index;
struct sensor_hub_data *sd = hid_get_drvdata(hdev);
unsigned char report_block[] = {
0x0a, 0x16, 0x03, 0x15, 0x00, 0x25, 0x05};
unsigned char power_block[] = {
0x0a, 0x19, 0x03, 0x15, 0x00, 0x25, 0x05};
if (!(sd->quirks & HID_SENSOR_HUB_ENUM_QUIRK)) {
hid_dbg(hdev, "No Enum quirks\n");
return rdesc;
}
/* Looks for power and report state usage id and force to 1 */
for (index = 0; index < *rsize; ++index) {
if (((*rsize - index) > sizeof(report_block)) &&
!memcmp(&rdesc[index], report_block,
sizeof(report_block))) {
rdesc[index + 4] = 0x01;
index += sizeof(report_block);
}
if (((*rsize - index) > sizeof(power_block)) &&
!memcmp(&rdesc[index], power_block,
sizeof(power_block))) {
rdesc[index + 4] = 0x01;
index += sizeof(power_block);
}
}
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;
struct hid_report *report;
struct hid_report_enum *report_enum;
struct hid_field *field;
int dev_cnt;
sd = devm_kzalloc(&hdev->dev, sizeof(*sd), GFP_KERNEL);
if (!sd) {
hid_err(hdev, "cannot allocate Sensor data\n");
return -ENOMEM;
}
sd->hsdev = devm_kzalloc(&hdev->dev, sizeof(*sd->hsdev), GFP_KERNEL);
if (!sd->hsdev) {
hid_err(hdev, "cannot allocate hid_sensor_hub_device\n");
return -ENOMEM;
}
hid_set_drvdata(hdev, sd);
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
sd->quirks = id->driver_data;
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");
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;
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_stop_hw;
}
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_stop_hw;
}
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_names;
}
sd->hid_sensor_hub_client_devs[
sd->hid_sensor_client_cnt].id = PLATFORM_DEVID_AUTO;
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, NULL);
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);
kfree(sd->hid_sensor_hub_client_devs);
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);
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);
}
static const struct hid_device_id sensor_hub_devices[] = {
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_0,
USB_DEVICE_ID_INTEL_HID_SENSOR),
.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_SENSOR_HUB, USB_VENDOR_ID_INTEL_1,
USB_DEVICE_ID_INTEL_HID_SENSOR),
.driver_data = HID_SENSOR_HUB_ENUM_QUIRK},
{ 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,
HID: hid-sensor-hub: Fix buggy report descriptors This addresses regression caused by commit id "751d17e23a9f7" iio: hid-sensors: Fix power and report state. This commit removed a quirk, to change the enumeration base to 1 from 0 based on an CONFIG paramter. There was objection to add more changes under this quirk, instead suggested to add an HID quirk. But there is no easy way to add HID qurik as the reports are not properly using collection class. The solution was to use logical minimum, which is a correct way. There were changes done in firmware to address this. Unfortunately some devices, still use old FW and can't be upgraded to newer version on Linux devices as there is no FW upgrade tool available for Linux devices. So we need to fix report descriptors, for such devices. This will not have any impact, if the FW uses logical 1 as minimum. In this patch we look for usage id for "power and report state", and modify logical minimum value to 1. Background on enum: In the original HID sensor hub firmwares all Named array enums were to 0-based. But the most recent hub implemented as 1-based, because of the implementation by one of the major OS vendor. Using logical minimum for the field as the base of enum. So we add logical minimum to the selector values before setting those fields. Some sensor hub FWs already changed logical minimum from 0 to 1 to reflect this and hope every other vendor will follow. There is no easy way to add a common HID quirk for NAry elements, even if the standard specifies these field as NAry, the collection used to describe selectors is still just "logical". Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2014-01-14 18:30:20 +01:00
.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");