![Kees Cook](/assets/img/avatar_default.png)
The devm_kzalloc() function has a 2-factor argument form, devm_kcalloc(). This patch replaces cases of: devm_kzalloc(handle, a * b, gfp) with: devm_kcalloc(handle, a * b, gfp) as well as handling cases of: devm_kzalloc(handle, a * b * c, gfp) with: devm_kzalloc(handle, array3_size(a, b, c), gfp) as it's slightly less ugly than: devm_kcalloc(handle, array_size(a, b), c, gfp) This does, however, attempt to ignore constant size factors like: devm_kzalloc(handle, 4 * 1024, gfp) though any constants defined via macros get caught up in the conversion. Any factors with a sizeof() of "unsigned char", "char", and "u8" were dropped, since they're redundant. Some manual whitespace fixes were needed in this patch, as Coccinelle really liked to write "=devm_kcalloc..." instead of "= devm_kcalloc...". The Coccinelle script used for this was: // Fix redundant parens around sizeof(). @@ expression HANDLE; type TYPE; expression THING, E; @@ ( devm_kzalloc(HANDLE, - (sizeof(TYPE)) * E + sizeof(TYPE) * E , ...) | devm_kzalloc(HANDLE, - (sizeof(THING)) * E + sizeof(THING) * E , ...) ) // Drop single-byte sizes and redundant parens. @@ expression HANDLE; expression COUNT; typedef u8; typedef __u8; @@ ( devm_kzalloc(HANDLE, - sizeof(u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * (COUNT) + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(__u8) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(char) * COUNT + COUNT , ...) | devm_kzalloc(HANDLE, - sizeof(unsigned char) * COUNT + COUNT , ...) ) // 2-factor product with sizeof(type/expression) and identifier or constant. @@ expression HANDLE; type TYPE; expression THING; identifier COUNT_ID; constant COUNT_CONST; @@ ( - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_ID) + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_ID + COUNT_ID, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (COUNT_CONST) + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * COUNT_CONST + COUNT_CONST, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_ID) + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_ID + COUNT_ID, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (COUNT_CONST) + COUNT_CONST, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * COUNT_CONST + COUNT_CONST, sizeof(THING) , ...) ) // 2-factor product, only identifiers. @@ expression HANDLE; identifier SIZE, COUNT; @@ - devm_kzalloc + devm_kcalloc (HANDLE, - SIZE * COUNT + COUNT, SIZE , ...) // 3-factor product with 1 sizeof(type) or sizeof(expression), with // redundant parens removed. @@ expression HANDLE; expression THING; identifier STRIDE, COUNT; type TYPE; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(TYPE)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * (COUNT) * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * (STRIDE) + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING) * COUNT * STRIDE + array3_size(COUNT, STRIDE, sizeof(THING)) , ...) ) // 3-factor product with 2 sizeof(variable), with redundant parens removed. @@ expression HANDLE; expression THING1, THING2; identifier COUNT; type TYPE1, TYPE2; @@ ( devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(TYPE2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(THING1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(THING1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * COUNT + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) | devm_kzalloc(HANDLE, - sizeof(TYPE1) * sizeof(THING2) * (COUNT) + array3_size(COUNT, sizeof(TYPE1), sizeof(THING2)) , ...) ) // 3-factor product, only identifiers, with redundant parens removed. @@ expression HANDLE; identifier STRIDE, SIZE, COUNT; @@ ( devm_kzalloc(HANDLE, - (COUNT) * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * STRIDE * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - (COUNT) * (STRIDE) * (SIZE) + array3_size(COUNT, STRIDE, SIZE) , ...) | devm_kzalloc(HANDLE, - COUNT * STRIDE * SIZE + array3_size(COUNT, STRIDE, SIZE) , ...) ) // Any remaining multi-factor products, first at least 3-factor products, // when they're not all constants... @@ expression HANDLE; expression E1, E2, E3; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, - (E1) * E2 * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * E3 + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - (E1) * (E2) * (E3) + array3_size(E1, E2, E3) , ...) | devm_kzalloc(HANDLE, - E1 * E2 * E3 + array3_size(E1, E2, E3) , ...) ) // And then all remaining 2 factors products when they're not all constants, // keeping sizeof() as the second factor argument. @@ expression HANDLE; expression THING, E1, E2; type TYPE; constant C1, C2, C3; @@ ( devm_kzalloc(HANDLE, sizeof(THING) * C2, ...) | devm_kzalloc(HANDLE, sizeof(TYPE) * C2, ...) | devm_kzalloc(HANDLE, C1 * C2 * C3, ...) | devm_kzalloc(HANDLE, C1 * C2, ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * (E2) + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(TYPE) * E2 + E2, sizeof(TYPE) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * (E2) + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - sizeof(THING) * E2 + E2, sizeof(THING) , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * E2 + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - (E1) * (E2) + E1, E2 , ...) | - devm_kzalloc + devm_kcalloc (HANDLE, - E1 * E2 + E1, E2 , ...) ) Signed-off-by: Kees Cook <keescook@chromium.org>
757 lines
21 KiB
C
757 lines
21 KiB
C
/*
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* HID Sensors Driver
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* Copyright (c) 2012, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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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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{
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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);
|
|
switch (hsdev->pending.raw_size) {
|
|
case 1:
|
|
ret_val = *(u8 *)hsdev->pending.raw_data;
|
|
break;
|
|
case 2:
|
|
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;
|
|
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 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);
|
|
hid_set_drvdata(hdev, NULL);
|
|
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,
|
|
#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");
|