![Wolfram Sang](/assets/img/avatar_default.png)
We should get 'driver_data' from 'struct device' directly. Going via platform_device is an unneeded step back and forth. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Simon Horman <horms+renesas@verge.net.au> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
846 lines
24 KiB
C
846 lines
24 KiB
C
/*
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* hid-sensor-custom.c
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* Copyright (c) 2015, 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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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/miscdevice.h>
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#include <linux/kfifo.h>
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#include <linux/sched.h>
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#include <linux/wait.h>
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#include <linux/poll.h>
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#include <linux/bsearch.h>
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#include <linux/platform_device.h>
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#include <linux/hid-sensor-hub.h>
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#define HID_CUSTOM_NAME_LENGTH 64
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#define HID_CUSTOM_MAX_CORE_ATTRS 10
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#define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1)
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#define HID_CUSTOM_FIFO_SIZE 4096
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#define HID_CUSTOM_MAX_FEATURE_BYTES 64
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struct hid_sensor_custom_field {
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int report_id;
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char group_name[HID_CUSTOM_NAME_LENGTH];
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struct hid_sensor_hub_attribute_info attribute;
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struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS];
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char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH];
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struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS];
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struct attribute_group hid_custom_attribute_group;
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};
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struct hid_sensor_custom {
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struct mutex mutex;
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struct platform_device *pdev;
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struct hid_sensor_hub_device *hsdev;
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struct hid_sensor_hub_callbacks callbacks;
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int sensor_field_count;
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struct hid_sensor_custom_field *fields;
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int input_field_count;
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int input_report_size;
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int input_report_recd_size;
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bool input_skip_sample;
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bool enable;
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struct hid_sensor_custom_field *power_state;
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struct hid_sensor_custom_field *report_state;
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struct miscdevice custom_dev;
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struct kfifo data_fifo;
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unsigned long misc_opened;
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wait_queue_head_t wait;
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};
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/* Header for each sample to user space via dev interface */
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struct hid_sensor_sample {
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u32 usage_id;
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u64 timestamp;
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u32 raw_len;
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} __packed;
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static struct attribute hid_custom_attrs[] = {
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{.name = "name", .mode = S_IRUGO},
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{.name = "units", .mode = S_IRUGO},
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{.name = "unit-expo", .mode = S_IRUGO},
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{.name = "minimum", .mode = S_IRUGO},
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{.name = "maximum", .mode = S_IRUGO},
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{.name = "size", .mode = S_IRUGO},
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{.name = "value", .mode = S_IWUSR | S_IRUGO},
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{.name = NULL}
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};
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static const struct hid_custom_usage_desc {
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int usage_id;
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char *desc;
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} hid_custom_usage_desc_table[] = {
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{0x200201, "event-sensor-state"},
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{0x200202, "event-sensor-event"},
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{0x200301, "property-friendly-name"},
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{0x200302, "property-persistent-unique-id"},
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{0x200303, "property-sensor-status"},
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{0x200304, "property-min-report-interval"},
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{0x200305, "property-sensor-manufacturer"},
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{0x200306, "property-sensor-model"},
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{0x200307, "property-sensor-serial-number"},
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{0x200308, "property-sensor-description"},
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{0x200309, "property-sensor-connection-type"},
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{0x20030A, "property-sensor-device-path"},
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{0x20030B, "property-hardware-revision"},
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{0x20030C, "property-firmware-version"},
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{0x20030D, "property-release-date"},
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{0x20030E, "property-report-interval"},
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{0x20030F, "property-change-sensitivity-absolute"},
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{0x200310, "property-change-sensitivity-percent-range"},
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{0x200311, "property-change-sensitivity-percent-relative"},
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{0x200312, "property-accuracy"},
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{0x200313, "property-resolution"},
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{0x200314, "property-maximum"},
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{0x200315, "property-minimum"},
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{0x200316, "property-reporting-state"},
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{0x200317, "property-sampling-rate"},
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{0x200318, "property-response-curve"},
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{0x200319, "property-power-state"},
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{0x200540, "data-field-custom"},
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{0x200541, "data-field-custom-usage"},
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{0x200542, "data-field-custom-boolean-array"},
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{0x200543, "data-field-custom-value"},
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{0x200544, "data-field-custom-value_1"},
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{0x200545, "data-field-custom-value_2"},
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{0x200546, "data-field-custom-value_3"},
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{0x200547, "data-field-custom-value_4"},
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{0x200548, "data-field-custom-value_5"},
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{0x200549, "data-field-custom-value_6"},
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{0x20054A, "data-field-custom-value_7"},
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{0x20054B, "data-field-custom-value_8"},
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{0x20054C, "data-field-custom-value_9"},
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{0x20054D, "data-field-custom-value_10"},
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{0x20054E, "data-field-custom-value_11"},
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{0x20054F, "data-field-custom-value_12"},
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{0x200550, "data-field-custom-value_13"},
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{0x200551, "data-field-custom-value_14"},
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{0x200552, "data-field-custom-value_15"},
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{0x200553, "data-field-custom-value_16"},
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{0x200554, "data-field-custom-value_17"},
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{0x200555, "data-field-custom-value_18"},
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{0x200556, "data-field-custom-value_19"},
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{0x200557, "data-field-custom-value_20"},
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{0x200558, "data-field-custom-value_21"},
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{0x200559, "data-field-custom-value_22"},
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{0x20055A, "data-field-custom-value_23"},
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{0x20055B, "data-field-custom-value_24"},
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{0x20055C, "data-field-custom-value_25"},
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{0x20055D, "data-field-custom-value_26"},
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{0x20055E, "data-field-custom-value_27"},
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{0x20055F, "data-field-custom-value_28"},
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};
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static int usage_id_cmp(const void *p1, const void *p2)
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{
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if (*(int *)p1 < *(int *)p2)
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return -1;
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if (*(int *)p1 > *(int *)p2)
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return 1;
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return 0;
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}
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static ssize_t enable_sensor_show(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
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return sprintf(buf, "%d\n", sensor_inst->enable);
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}
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static int set_power_report_state(struct hid_sensor_custom *sensor_inst,
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bool state)
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{
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int power_val = -1;
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int report_val = -1;
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u32 power_state_usage_id;
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u32 report_state_usage_id;
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int ret;
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/*
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* It is possible that the power/report state ids are not present.
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* In this case this function will return success. But if the
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* ids are present, then it will return error if set fails.
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*/
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if (state) {
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power_state_usage_id =
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HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM;
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report_state_usage_id =
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HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM;
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} else {
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power_state_usage_id =
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HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM;
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report_state_usage_id =
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HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM;
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}
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if (sensor_inst->power_state)
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power_val = hid_sensor_get_usage_index(sensor_inst->hsdev,
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sensor_inst->power_state->attribute.report_id,
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sensor_inst->power_state->attribute.index,
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power_state_usage_id);
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if (sensor_inst->report_state)
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report_val = hid_sensor_get_usage_index(sensor_inst->hsdev,
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sensor_inst->report_state->attribute.report_id,
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sensor_inst->report_state->attribute.index,
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report_state_usage_id);
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if (power_val >= 0) {
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power_val +=
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sensor_inst->power_state->attribute.logical_minimum;
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ret = sensor_hub_set_feature(sensor_inst->hsdev,
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sensor_inst->power_state->attribute.report_id,
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sensor_inst->power_state->attribute.index,
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sizeof(power_val),
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&power_val);
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if (ret) {
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hid_err(sensor_inst->hsdev->hdev,
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"Set power state failed\n");
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return ret;
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}
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}
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if (report_val >= 0) {
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report_val +=
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sensor_inst->report_state->attribute.logical_minimum;
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ret = sensor_hub_set_feature(sensor_inst->hsdev,
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sensor_inst->report_state->attribute.report_id,
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sensor_inst->report_state->attribute.index,
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sizeof(report_val),
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&report_val);
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if (ret) {
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hid_err(sensor_inst->hsdev->hdev,
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"Set report state failed\n");
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return ret;
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}
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}
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return 0;
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}
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static ssize_t enable_sensor_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
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int value;
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int ret = -EINVAL;
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if (kstrtoint(buf, 0, &value) != 0)
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return -EINVAL;
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mutex_lock(&sensor_inst->mutex);
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if (value && !sensor_inst->enable) {
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ret = sensor_hub_device_open(sensor_inst->hsdev);
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if (ret)
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goto unlock_state;
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ret = set_power_report_state(sensor_inst, true);
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if (ret) {
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sensor_hub_device_close(sensor_inst->hsdev);
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goto unlock_state;
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}
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sensor_inst->enable = true;
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} else if (!value && sensor_inst->enable) {
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ret = set_power_report_state(sensor_inst, false);
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sensor_hub_device_close(sensor_inst->hsdev);
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sensor_inst->enable = false;
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}
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unlock_state:
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mutex_unlock(&sensor_inst->mutex);
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if (ret < 0)
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return ret;
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return count;
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}
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static DEVICE_ATTR_RW(enable_sensor);
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static struct attribute *enable_sensor_attrs[] = {
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&dev_attr_enable_sensor.attr,
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NULL,
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};
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static const struct attribute_group enable_sensor_attr_group = {
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.attrs = enable_sensor_attrs,
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};
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static ssize_t show_value(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
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struct hid_sensor_hub_attribute_info *attribute;
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int index, usage, field_index;
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char name[HID_CUSTOM_NAME_LENGTH];
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bool feature = false;
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bool input = false;
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int value = 0;
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if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
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name) == 3) {
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feature = true;
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field_index = index + sensor_inst->input_field_count;
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} else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage,
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name) == 3) {
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input = true;
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field_index = index;
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} else
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return -EINVAL;
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if (!strncmp(name, "value", strlen("value"))) {
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u32 report_id;
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int ret;
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attribute = &sensor_inst->fields[field_index].attribute;
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report_id = attribute->report_id;
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if (feature) {
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u8 values[HID_CUSTOM_MAX_FEATURE_BYTES];
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int len = 0;
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u64 value = 0;
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int i = 0;
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ret = sensor_hub_get_feature(sensor_inst->hsdev,
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report_id,
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index,
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sizeof(values), values);
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if (ret < 0)
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return ret;
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while (i < ret) {
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if (i + attribute->size > ret) {
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len += snprintf(&buf[len],
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PAGE_SIZE - len,
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"%d ", values[i]);
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break;
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}
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switch (attribute->size) {
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case 2:
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value = (u64) *(u16 *)&values[i];
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i += attribute->size;
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break;
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case 4:
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value = (u64) *(u32 *)&values[i];
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i += attribute->size;
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break;
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case 8:
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value = *(u64 *)&values[i];
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i += attribute->size;
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break;
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default:
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value = (u64) values[i];
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++i;
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break;
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}
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len += snprintf(&buf[len], PAGE_SIZE - len,
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"%lld ", value);
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}
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len += snprintf(&buf[len], PAGE_SIZE - len, "\n");
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return len;
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} else if (input)
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value = sensor_hub_input_attr_get_raw_value(
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sensor_inst->hsdev,
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sensor_inst->hsdev->usage,
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usage, report_id,
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SENSOR_HUB_SYNC, false);
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} else if (!strncmp(name, "units", strlen("units")))
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value = sensor_inst->fields[field_index].attribute.units;
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else if (!strncmp(name, "unit-expo", strlen("unit-expo")))
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value = sensor_inst->fields[field_index].attribute.unit_expo;
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else if (!strncmp(name, "size", strlen("size")))
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value = sensor_inst->fields[field_index].attribute.size;
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else if (!strncmp(name, "minimum", strlen("minimum")))
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value = sensor_inst->fields[field_index].attribute.
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logical_minimum;
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else if (!strncmp(name, "maximum", strlen("maximum")))
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value = sensor_inst->fields[field_index].attribute.
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logical_maximum;
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else if (!strncmp(name, "name", strlen("name"))) {
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struct hid_custom_usage_desc *usage_desc;
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usage_desc = bsearch(&usage, hid_custom_usage_desc_table,
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ARRAY_SIZE(hid_custom_usage_desc_table),
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sizeof(struct hid_custom_usage_desc),
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usage_id_cmp);
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if (usage_desc)
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return snprintf(buf, PAGE_SIZE, "%s\n",
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usage_desc->desc);
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else
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return sprintf(buf, "not-specified\n");
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} else
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return -EINVAL;
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return sprintf(buf, "%d\n", value);
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}
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static ssize_t store_value(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev);
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int index, field_index, usage;
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char name[HID_CUSTOM_NAME_LENGTH];
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int value;
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if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage,
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name) == 3) {
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field_index = index + sensor_inst->input_field_count;
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} else
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return -EINVAL;
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if (!strncmp(name, "value", strlen("value"))) {
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u32 report_id;
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int ret;
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if (kstrtoint(buf, 0, &value) != 0)
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return -EINVAL;
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report_id = sensor_inst->fields[field_index].attribute.
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report_id;
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ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id,
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index, sizeof(value), &value);
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} else
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return -EINVAL;
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return count;
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}
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static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev,
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unsigned usage_id, size_t raw_len,
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char *raw_data, void *priv)
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{
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struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
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struct hid_sensor_sample header;
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/* If any error occurs in a sample, rest of the fields are ignored */
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if (sensor_inst->input_skip_sample) {
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hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n");
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return 0;
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}
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hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__,
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(int) (sensor_inst->input_report_recd_size + raw_len),
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sensor_inst->input_report_size);
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if (!test_bit(0, &sensor_inst->misc_opened))
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return 0;
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if (!sensor_inst->input_report_recd_size) {
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int required_size = sizeof(struct hid_sensor_sample) +
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sensor_inst->input_report_size;
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header.usage_id = hsdev->usage;
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header.raw_len = sensor_inst->input_report_size;
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header.timestamp = ktime_get_real_ns();
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if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) {
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kfifo_in(&sensor_inst->data_fifo,
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(unsigned char *)&header,
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sizeof(header));
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} else
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sensor_inst->input_skip_sample = true;
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}
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if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len)
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kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data,
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raw_len);
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sensor_inst->input_report_recd_size += raw_len;
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return 0;
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}
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static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev,
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unsigned usage_id, void *priv)
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{
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struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv);
|
|
|
|
if (!test_bit(0, &sensor_inst->misc_opened))
|
|
return 0;
|
|
|
|
sensor_inst->input_report_recd_size = 0;
|
|
sensor_inst->input_skip_sample = false;
|
|
|
|
wake_up(&sensor_inst->wait);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hid_sensor_custom_add_field(struct hid_sensor_custom *sensor_inst,
|
|
int index, int report_type,
|
|
struct hid_report *report,
|
|
struct hid_field *field)
|
|
{
|
|
struct hid_sensor_custom_field *sensor_field;
|
|
void *fields;
|
|
|
|
fields = krealloc(sensor_inst->fields,
|
|
(sensor_inst->sensor_field_count + 1) *
|
|
sizeof(struct hid_sensor_custom_field), GFP_KERNEL);
|
|
if (!fields) {
|
|
kfree(sensor_inst->fields);
|
|
return -ENOMEM;
|
|
}
|
|
sensor_inst->fields = fields;
|
|
sensor_field = &sensor_inst->fields[sensor_inst->sensor_field_count];
|
|
sensor_field->attribute.usage_id = sensor_inst->hsdev->usage;
|
|
if (field->logical)
|
|
sensor_field->attribute.attrib_id = field->logical;
|
|
else
|
|
sensor_field->attribute.attrib_id = field->usage[0].hid;
|
|
|
|
sensor_field->attribute.index = index;
|
|
sensor_field->attribute.report_id = report->id;
|
|
sensor_field->attribute.units = field->unit;
|
|
sensor_field->attribute.unit_expo = field->unit_exponent;
|
|
sensor_field->attribute.size = (field->report_size / 8);
|
|
sensor_field->attribute.logical_minimum = field->logical_minimum;
|
|
sensor_field->attribute.logical_maximum = field->logical_maximum;
|
|
|
|
if (report_type == HID_FEATURE_REPORT)
|
|
snprintf(sensor_field->group_name,
|
|
sizeof(sensor_field->group_name), "feature-%x-%x",
|
|
sensor_field->attribute.index,
|
|
sensor_field->attribute.attrib_id);
|
|
else if (report_type == HID_INPUT_REPORT) {
|
|
snprintf(sensor_field->group_name,
|
|
sizeof(sensor_field->group_name),
|
|
"input-%x-%x", sensor_field->attribute.index,
|
|
sensor_field->attribute.attrib_id);
|
|
sensor_inst->input_field_count++;
|
|
sensor_inst->input_report_size += (field->report_size *
|
|
field->report_count) / 8;
|
|
}
|
|
|
|
memset(&sensor_field->hid_custom_attribute_group, 0,
|
|
sizeof(struct attribute_group));
|
|
sensor_inst->sensor_field_count++;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hid_sensor_custom_add_fields(struct hid_sensor_custom *sensor_inst,
|
|
struct hid_report_enum *report_enum,
|
|
int report_type)
|
|
{
|
|
int i;
|
|
int ret;
|
|
struct hid_report *report;
|
|
struct hid_field *field;
|
|
struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
|
|
|
|
list_for_each_entry(report, &report_enum->report_list, list) {
|
|
for (i = 0; i < report->maxfield; ++i) {
|
|
field = report->field[i];
|
|
if (field->maxusage &&
|
|
((field->usage[0].collection_index >=
|
|
hsdev->start_collection_index) &&
|
|
(field->usage[0].collection_index <
|
|
hsdev->end_collection_index))) {
|
|
|
|
ret = hid_sensor_custom_add_field(sensor_inst,
|
|
i,
|
|
report_type,
|
|
report,
|
|
field);
|
|
if (ret)
|
|
return ret;
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hid_sensor_custom_add_attributes(struct hid_sensor_custom
|
|
*sensor_inst)
|
|
{
|
|
struct hid_sensor_hub_device *hsdev = sensor_inst->hsdev;
|
|
struct hid_device *hdev = hsdev->hdev;
|
|
int ret = -1;
|
|
int i, j;
|
|
|
|
for (j = 0; j < HID_REPORT_TYPES; ++j) {
|
|
if (j == HID_OUTPUT_REPORT)
|
|
continue;
|
|
|
|
ret = hid_sensor_custom_add_fields(sensor_inst,
|
|
&hdev->report_enum[j], j);
|
|
if (ret)
|
|
return ret;
|
|
|
|
}
|
|
|
|
/* Create sysfs attributes */
|
|
for (i = 0; i < sensor_inst->sensor_field_count; ++i) {
|
|
j = 0;
|
|
while (j < HID_CUSTOM_TOTAL_ATTRS &&
|
|
hid_custom_attrs[j].name) {
|
|
struct device_attribute *device_attr;
|
|
|
|
device_attr = &sensor_inst->fields[i].sd_attrs[j];
|
|
|
|
snprintf((char *)&sensor_inst->fields[i].attr_name[j],
|
|
HID_CUSTOM_NAME_LENGTH, "%s-%s",
|
|
sensor_inst->fields[i].group_name,
|
|
hid_custom_attrs[j].name);
|
|
sysfs_attr_init(&device_attr->attr);
|
|
device_attr->attr.name =
|
|
(char *)&sensor_inst->fields[i].attr_name[j];
|
|
device_attr->attr.mode = hid_custom_attrs[j].mode;
|
|
device_attr->show = show_value;
|
|
if (hid_custom_attrs[j].mode & S_IWUSR)
|
|
device_attr->store = store_value;
|
|
sensor_inst->fields[i].attrs[j] = &device_attr->attr;
|
|
++j;
|
|
}
|
|
sensor_inst->fields[i].attrs[j] = NULL;
|
|
sensor_inst->fields[i].hid_custom_attribute_group.attrs =
|
|
sensor_inst->fields[i].attrs;
|
|
sensor_inst->fields[i].hid_custom_attribute_group.name =
|
|
sensor_inst->fields[i].group_name;
|
|
ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
|
|
&sensor_inst->fields[i].
|
|
hid_custom_attribute_group);
|
|
if (ret)
|
|
break;
|
|
|
|
/* For power or report field store indexes */
|
|
if (sensor_inst->fields[i].attribute.attrib_id ==
|
|
HID_USAGE_SENSOR_PROY_POWER_STATE)
|
|
sensor_inst->power_state = &sensor_inst->fields[i];
|
|
else if (sensor_inst->fields[i].attribute.attrib_id ==
|
|
HID_USAGE_SENSOR_PROP_REPORT_STATE)
|
|
sensor_inst->report_state = &sensor_inst->fields[i];
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void hid_sensor_custom_remove_attributes(struct hid_sensor_custom *
|
|
sensor_inst)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < sensor_inst->sensor_field_count; ++i)
|
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
|
|
&sensor_inst->fields[i].
|
|
hid_custom_attribute_group);
|
|
|
|
kfree(sensor_inst->fields);
|
|
}
|
|
|
|
static ssize_t hid_sensor_custom_read(struct file *file, char __user *buf,
|
|
size_t count, loff_t *f_ps)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst;
|
|
unsigned int copied;
|
|
int ret;
|
|
|
|
sensor_inst = container_of(file->private_data,
|
|
struct hid_sensor_custom, custom_dev);
|
|
|
|
if (count < sizeof(struct hid_sensor_sample))
|
|
return -EINVAL;
|
|
|
|
do {
|
|
if (kfifo_is_empty(&sensor_inst->data_fifo)) {
|
|
if (file->f_flags & O_NONBLOCK)
|
|
return -EAGAIN;
|
|
|
|
ret = wait_event_interruptible(sensor_inst->wait,
|
|
!kfifo_is_empty(&sensor_inst->data_fifo));
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
ret = kfifo_to_user(&sensor_inst->data_fifo, buf, count,
|
|
&copied);
|
|
if (ret)
|
|
return ret;
|
|
|
|
} while (copied == 0);
|
|
|
|
return copied;
|
|
}
|
|
|
|
static int hid_sensor_custom_release(struct inode *inode, struct file *file)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst;
|
|
|
|
sensor_inst = container_of(file->private_data,
|
|
struct hid_sensor_custom, custom_dev);
|
|
|
|
clear_bit(0, &sensor_inst->misc_opened);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int hid_sensor_custom_open(struct inode *inode, struct file *file)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst;
|
|
|
|
sensor_inst = container_of(file->private_data,
|
|
struct hid_sensor_custom, custom_dev);
|
|
/* We essentially have single reader and writer */
|
|
if (test_and_set_bit(0, &sensor_inst->misc_opened))
|
|
return -EBUSY;
|
|
|
|
return nonseekable_open(inode, file);
|
|
}
|
|
|
|
static __poll_t hid_sensor_custom_poll(struct file *file,
|
|
struct poll_table_struct *wait)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst;
|
|
__poll_t mask = 0;
|
|
|
|
sensor_inst = container_of(file->private_data,
|
|
struct hid_sensor_custom, custom_dev);
|
|
|
|
poll_wait(file, &sensor_inst->wait, wait);
|
|
|
|
if (!kfifo_is_empty(&sensor_inst->data_fifo))
|
|
mask = EPOLLIN | EPOLLRDNORM;
|
|
|
|
return mask;
|
|
}
|
|
|
|
static const struct file_operations hid_sensor_custom_fops = {
|
|
.open = hid_sensor_custom_open,
|
|
.read = hid_sensor_custom_read,
|
|
.release = hid_sensor_custom_release,
|
|
.poll = hid_sensor_custom_poll,
|
|
.llseek = noop_llseek,
|
|
};
|
|
|
|
static int hid_sensor_custom_dev_if_add(struct hid_sensor_custom *sensor_inst)
|
|
{
|
|
int ret;
|
|
|
|
ret = kfifo_alloc(&sensor_inst->data_fifo, HID_CUSTOM_FIFO_SIZE,
|
|
GFP_KERNEL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
init_waitqueue_head(&sensor_inst->wait);
|
|
|
|
sensor_inst->custom_dev.minor = MISC_DYNAMIC_MINOR;
|
|
sensor_inst->custom_dev.name = dev_name(&sensor_inst->pdev->dev);
|
|
sensor_inst->custom_dev.fops = &hid_sensor_custom_fops,
|
|
ret = misc_register(&sensor_inst->custom_dev);
|
|
if (ret) {
|
|
kfifo_free(&sensor_inst->data_fifo);
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void hid_sensor_custom_dev_if_remove(struct hid_sensor_custom
|
|
*sensor_inst)
|
|
{
|
|
wake_up(&sensor_inst->wait);
|
|
misc_deregister(&sensor_inst->custom_dev);
|
|
kfifo_free(&sensor_inst->data_fifo);
|
|
|
|
}
|
|
|
|
static int hid_sensor_custom_probe(struct platform_device *pdev)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst;
|
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
|
|
int ret;
|
|
|
|
sensor_inst = devm_kzalloc(&pdev->dev, sizeof(*sensor_inst),
|
|
GFP_KERNEL);
|
|
if (!sensor_inst)
|
|
return -ENOMEM;
|
|
|
|
sensor_inst->callbacks.capture_sample = hid_sensor_capture_sample;
|
|
sensor_inst->callbacks.send_event = hid_sensor_send_event;
|
|
sensor_inst->callbacks.pdev = pdev;
|
|
sensor_inst->hsdev = hsdev;
|
|
sensor_inst->pdev = pdev;
|
|
mutex_init(&sensor_inst->mutex);
|
|
platform_set_drvdata(pdev, sensor_inst);
|
|
ret = sensor_hub_register_callback(hsdev, hsdev->usage,
|
|
&sensor_inst->callbacks);
|
|
if (ret < 0) {
|
|
dev_err(&pdev->dev, "callback reg failed\n");
|
|
return ret;
|
|
}
|
|
|
|
ret = sysfs_create_group(&sensor_inst->pdev->dev.kobj,
|
|
&enable_sensor_attr_group);
|
|
if (ret)
|
|
goto err_remove_callback;
|
|
|
|
ret = hid_sensor_custom_add_attributes(sensor_inst);
|
|
if (ret)
|
|
goto err_remove_group;
|
|
|
|
ret = hid_sensor_custom_dev_if_add(sensor_inst);
|
|
if (ret)
|
|
goto err_remove_attributes;
|
|
|
|
return 0;
|
|
|
|
err_remove_attributes:
|
|
hid_sensor_custom_remove_attributes(sensor_inst);
|
|
err_remove_group:
|
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
|
|
&enable_sensor_attr_group);
|
|
err_remove_callback:
|
|
sensor_hub_remove_callback(hsdev, hsdev->usage);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int hid_sensor_custom_remove(struct platform_device *pdev)
|
|
{
|
|
struct hid_sensor_custom *sensor_inst = platform_get_drvdata(pdev);
|
|
struct hid_sensor_hub_device *hsdev = pdev->dev.platform_data;
|
|
|
|
hid_sensor_custom_dev_if_remove(sensor_inst);
|
|
hid_sensor_custom_remove_attributes(sensor_inst);
|
|
sysfs_remove_group(&sensor_inst->pdev->dev.kobj,
|
|
&enable_sensor_attr_group);
|
|
sensor_hub_remove_callback(hsdev, hsdev->usage);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id hid_sensor_custom_ids[] = {
|
|
{
|
|
.name = "HID-SENSOR-2000e1",
|
|
},
|
|
{
|
|
.name = "HID-SENSOR-2000e2",
|
|
},
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, hid_sensor_custom_ids);
|
|
|
|
static struct platform_driver hid_sensor_custom_platform_driver = {
|
|
.id_table = hid_sensor_custom_ids,
|
|
.driver = {
|
|
.name = KBUILD_MODNAME,
|
|
},
|
|
.probe = hid_sensor_custom_probe,
|
|
.remove = hid_sensor_custom_remove,
|
|
};
|
|
module_platform_driver(hid_sensor_custom_platform_driver);
|
|
|
|
MODULE_DESCRIPTION("HID Sensor Custom and Generic sensor Driver");
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
|
MODULE_LICENSE("GPL");
|