forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
773 lines
21 KiB
773 lines
21 KiB
// SPDX-License-Identifier: GPL-2.0-only |
|
/* |
|
* HID Sensors Driver |
|
* Copyright (c) 2012, Intel Corporation. |
|
*/ |
|
|
|
#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" |
|
|
|
#define HID_SENSOR_HUB_ENUM_QUIRK 0x01 |
|
|
|
/** |
|
* 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. |
|
* @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). |
|
* @ref_cnt: Number of MFD clients have opened this device |
|
*/ |
|
struct sensor_hub_data { |
|
struct mutex mutex; |
|
spinlock_t lock; |
|
struct list_head dyn_callback_list; |
|
spinlock_t dyn_callback_lock; |
|
struct mfd_cell *hid_sensor_hub_client_devs; |
|
int hid_sensor_client_cnt; |
|
unsigned long quirks; |
|
int ref_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_device *hsdev; |
|
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_device *hdev) |
|
{ |
|
int i; |
|
int count = 0; |
|
|
|
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) |
|
++count; |
|
} |
|
|
|
return count; |
|
} |
|
|
|
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, |
|
int collection_index, |
|
struct hid_sensor_hub_device **hsdev, |
|
void **priv) |
|
{ |
|
struct hid_sensor_hub_callbacks_list *callback; |
|
struct sensor_hub_data *pdata = hid_get_drvdata(hdev); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
|
list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
|
if ((callback->usage_id == usage_id || |
|
callback->usage_id == HID_USAGE_SENSOR_COLLECTION) && |
|
(collection_index >= |
|
callback->hsdev->start_collection_index) && |
|
(collection_index < |
|
callback->hsdev->end_collection_index)) { |
|
*priv = callback->priv; |
|
*hsdev = callback->hsdev; |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, |
|
flags); |
|
return callback->usage_callback; |
|
} |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
|
|
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); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
|
list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
|
if (callback->usage_id == usage_id && |
|
callback->hsdev == hsdev) { |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
return -EINVAL; |
|
} |
|
callback = kzalloc(sizeof(*callback), GFP_ATOMIC); |
|
if (!callback) { |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
return -ENOMEM; |
|
} |
|
callback->hsdev = hsdev; |
|
callback->usage_callback = usage_callback; |
|
callback->usage_id = usage_id; |
|
callback->priv = NULL; |
|
/* |
|
* If there is a handler registered for the collection type, then |
|
* it will handle all reports for sensors in this collection. If |
|
* there is also an individual sensor handler registration, then |
|
* we want to make sure that the reports are directed to collection |
|
* handler, as this may be a fusion sensor. So add collection handlers |
|
* to the beginning of the list, so that they are matched first. |
|
*/ |
|
if (usage_id == HID_USAGE_SENSOR_COLLECTION) |
|
list_add(&callback->list, &pdata->dyn_callback_list); |
|
else |
|
list_add_tail(&callback->list, &pdata->dyn_callback_list); |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
|
|
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); |
|
unsigned long flags; |
|
|
|
spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
|
list_for_each_entry(callback, &pdata->dyn_callback_list, list) |
|
if (callback->usage_id == usage_id && |
|
callback->hsdev == hsdev) { |
|
list_del(&callback->list); |
|
kfree(callback); |
|
break; |
|
} |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
|
|
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, int buffer_size, void *buffer) |
|
{ |
|
struct hid_report *report; |
|
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
|
__s32 *buf32 = buffer; |
|
int i = 0; |
|
int remaining_bytes; |
|
__s32 value; |
|
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; |
|
} |
|
|
|
remaining_bytes = buffer_size % sizeof(__s32); |
|
buffer_size = buffer_size / sizeof(__s32); |
|
if (buffer_size) { |
|
for (i = 0; i < buffer_size; ++i) { |
|
hid_set_field(report->field[field_index], i, |
|
(__force __s32)cpu_to_le32(*buf32)); |
|
++buf32; |
|
} |
|
} |
|
if (remaining_bytes) { |
|
value = 0; |
|
memcpy(&value, (u8 *)buf32, remaining_bytes); |
|
hid_set_field(report->field[field_index], i, |
|
(__force __s32)cpu_to_le32(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, int buffer_size, void *buffer) |
|
{ |
|
struct hid_report *report; |
|
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
|
int report_size; |
|
int ret = 0; |
|
u8 *val_ptr; |
|
int buffer_index = 0; |
|
int i; |
|
|
|
memset(buffer, 0, buffer_size); |
|
|
|
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); |
|
|
|
/* calculate number of bytes required to read this field */ |
|
report_size = DIV_ROUND_UP(report->field[field_index]->report_size, |
|
8) * |
|
report->field[field_index]->report_count; |
|
if (!report_size) { |
|
ret = -EINVAL; |
|
goto done_proc; |
|
} |
|
ret = min(report_size, buffer_size); |
|
|
|
val_ptr = (u8 *)report->field[field_index]->value; |
|
for (i = 0; i < report->field[field_index]->report_count; ++i) { |
|
if (buffer_index >= ret) |
|
break; |
|
|
|
memcpy(&((u8 *)buffer)[buffer_index], val_ptr, |
|
report->field[field_index]->report_size / 8); |
|
val_ptr += sizeof(__s32); |
|
buffer_index += (report->field[field_index]->report_size / 8); |
|
} |
|
|
|
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, |
|
enum sensor_hub_read_flags flag, |
|
bool is_signed) |
|
{ |
|
struct sensor_hub_data *data = hid_get_drvdata(hsdev->hdev); |
|
unsigned long flags; |
|
struct hid_report *report; |
|
int ret_val = 0; |
|
|
|
report = sensor_hub_report(report_id, hsdev->hdev, |
|
HID_INPUT_REPORT); |
|
if (!report) |
|
return -EINVAL; |
|
|
|
mutex_lock(hsdev->mutex_ptr); |
|
if (flag == SENSOR_HUB_SYNC) { |
|
memset(&hsdev->pending, 0, sizeof(hsdev->pending)); |
|
init_completion(&hsdev->pending.ready); |
|
hsdev->pending.usage_id = usage_id; |
|
hsdev->pending.attr_usage_id = attr_usage_id; |
|
hsdev->pending.raw_size = 0; |
|
|
|
spin_lock_irqsave(&data->lock, flags); |
|
hsdev->pending.status = true; |
|
spin_unlock_irqrestore(&data->lock, flags); |
|
} |
|
mutex_lock(&data->mutex); |
|
hid_hw_request(hsdev->hdev, report, HID_REQ_GET_REPORT); |
|
mutex_unlock(&data->mutex); |
|
if (flag == SENSOR_HUB_SYNC) { |
|
wait_for_completion_interruptible_timeout( |
|
&hsdev->pending.ready, HZ*5); |
|
switch (hsdev->pending.raw_size) { |
|
case 1: |
|
if (is_signed) |
|
ret_val = *(s8 *)hsdev->pending.raw_data; |
|
else |
|
ret_val = *(u8 *)hsdev->pending.raw_data; |
|
break; |
|
case 2: |
|
if (is_signed) |
|
ret_val = *(s16 *)hsdev->pending.raw_data; |
|
else |
|
ret_val = *(u16 *)hsdev->pending.raw_data; |
|
break; |
|
case 4: |
|
ret_val = *(u32 *)hsdev->pending.raw_data; |
|
break; |
|
default: |
|
ret_val = 0; |
|
} |
|
kfree(hsdev->pending.raw_data); |
|
hsdev->pending.status = false; |
|
} |
|
mutex_unlock(hsdev->mutex_ptr); |
|
|
|
return ret_val; |
|
} |
|
EXPORT_SYMBOL_GPL(sensor_hub_input_attr_get_raw_value); |
|
|
|
int hid_sensor_get_usage_index(struct hid_sensor_hub_device *hsdev, |
|
u32 report_id, int field_index, u32 usage_id) |
|
{ |
|
struct hid_report *report; |
|
struct hid_field *field; |
|
int i; |
|
|
|
report = sensor_hub_report(report_id, hsdev->hdev, HID_FEATURE_REPORT); |
|
if (!report || (field_index >= report->maxfield)) |
|
goto done_proc; |
|
|
|
field = report->field[field_index]; |
|
for (i = 0; i < field->maxusage; ++i) { |
|
if (field->usage[i].hid == usage_id) |
|
return field->usage[i].usage_index; |
|
} |
|
|
|
done_proc: |
|
return -EINVAL; |
|
} |
|
EXPORT_SYMBOL_GPL(hid_sensor_get_usage_index); |
|
|
|
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; |
|
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; |
|
|
|
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->maxusage) { |
|
if (field->physical == usage_id && |
|
(field->logical == attr_usage_id || |
|
field->usage[0].hid == |
|
attr_usage_id) && |
|
(field->usage[0].collection_index >= |
|
hsdev->start_collection_index) && |
|
(field->usage[0].collection_index < |
|
hsdev->end_collection_index)) { |
|
|
|
sensor_hub_fill_attr_info(info, i, |
|
report->id, |
|
field); |
|
ret = 0; |
|
break; |
|
} |
|
} |
|
} |
|
|
|
} |
|
|
|
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; |
|
unsigned long flags; |
|
|
|
hid_dbg(hdev, " sensor_hub_suspend\n"); |
|
spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
|
list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
|
if (callback->usage_callback->suspend) |
|
callback->usage_callback->suspend( |
|
callback->hsdev, callback->priv); |
|
} |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
|
|
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; |
|
unsigned long flags; |
|
|
|
hid_dbg(hdev, " sensor_hub_resume\n"); |
|
spin_lock_irqsave(&pdata->dyn_callback_lock, flags); |
|
list_for_each_entry(callback, &pdata->dyn_callback_list, list) { |
|
if (callback->usage_callback->resume) |
|
callback->usage_callback->resume( |
|
callback->hsdev, callback->priv); |
|
} |
|
spin_unlock_irqrestore(&pdata->dyn_callback_lock, flags); |
|
|
|
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; |
|
struct hid_sensor_hub_device *hsdev = 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; |
|
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 <[email protected]>"); |
|
MODULE_LICENSE("GPL");
|
|
|