// SPDX-License-Identifier: GPL-2.0-only /* * hid-sensor-custom.c * Copyright (c) 2015, Intel Corporation. */ #include #include #include #include #include #include #include #include #include #include #include #include #define HID_CUSTOM_NAME_LENGTH 64 #define HID_CUSTOM_MAX_CORE_ATTRS 10 #define HID_CUSTOM_TOTAL_ATTRS (HID_CUSTOM_MAX_CORE_ATTRS + 1) #define HID_CUSTOM_FIFO_SIZE 4096 #define HID_CUSTOM_MAX_FEATURE_BYTES 64 #define HID_SENSOR_USAGE_LENGTH (4 + 1) struct hid_sensor_custom_field { int report_id; char group_name[HID_CUSTOM_NAME_LENGTH]; struct hid_sensor_hub_attribute_info attribute; struct device_attribute sd_attrs[HID_CUSTOM_MAX_CORE_ATTRS]; char attr_name[HID_CUSTOM_TOTAL_ATTRS][HID_CUSTOM_NAME_LENGTH]; struct attribute *attrs[HID_CUSTOM_TOTAL_ATTRS]; struct attribute_group hid_custom_attribute_group; }; struct hid_sensor_custom { struct mutex mutex; struct platform_device *pdev; struct hid_sensor_hub_device *hsdev; struct hid_sensor_hub_callbacks callbacks; int sensor_field_count; struct hid_sensor_custom_field *fields; int input_field_count; int input_report_size; int input_report_recd_size; bool input_skip_sample; bool enable; struct hid_sensor_custom_field *power_state; struct hid_sensor_custom_field *report_state; struct miscdevice custom_dev; struct kfifo data_fifo; unsigned long misc_opened; wait_queue_head_t wait; struct platform_device *custom_pdev; }; /* Header for each sample to user space via dev interface */ struct hid_sensor_sample { u32 usage_id; u64 timestamp; u32 raw_len; } __packed; static struct attribute hid_custom_attrs[] = { {.name = "name", .mode = S_IRUGO}, {.name = "units", .mode = S_IRUGO}, {.name = "unit-expo", .mode = S_IRUGO}, {.name = "minimum", .mode = S_IRUGO}, {.name = "maximum", .mode = S_IRUGO}, {.name = "size", .mode = S_IRUGO}, {.name = "value", .mode = S_IWUSR | S_IRUGO}, {.name = NULL} }; static const struct hid_custom_usage_desc { int usage_id; char *desc; } hid_custom_usage_desc_table[] = { {0x200201, "event-sensor-state"}, {0x200202, "event-sensor-event"}, {0x200301, "property-friendly-name"}, {0x200302, "property-persistent-unique-id"}, {0x200303, "property-sensor-status"}, {0x200304, "property-min-report-interval"}, {0x200305, "property-sensor-manufacturer"}, {0x200306, "property-sensor-model"}, {0x200307, "property-sensor-serial-number"}, {0x200308, "property-sensor-description"}, {0x200309, "property-sensor-connection-type"}, {0x20030A, "property-sensor-device-path"}, {0x20030B, "property-hardware-revision"}, {0x20030C, "property-firmware-version"}, {0x20030D, "property-release-date"}, {0x20030E, "property-report-interval"}, {0x20030F, "property-change-sensitivity-absolute"}, {0x200310, "property-change-sensitivity-percent-range"}, {0x200311, "property-change-sensitivity-percent-relative"}, {0x200312, "property-accuracy"}, {0x200313, "property-resolution"}, {0x200314, "property-maximum"}, {0x200315, "property-minimum"}, {0x200316, "property-reporting-state"}, {0x200317, "property-sampling-rate"}, {0x200318, "property-response-curve"}, {0x200319, "property-power-state"}, {0x200540, "data-field-custom"}, {0x200541, "data-field-custom-usage"}, {0x200542, "data-field-custom-boolean-array"}, {0x200543, "data-field-custom-value"}, {0x200544, "data-field-custom-value_1"}, {0x200545, "data-field-custom-value_2"}, {0x200546, "data-field-custom-value_3"}, {0x200547, "data-field-custom-value_4"}, {0x200548, "data-field-custom-value_5"}, {0x200549, "data-field-custom-value_6"}, {0x20054A, "data-field-custom-value_7"}, {0x20054B, "data-field-custom-value_8"}, {0x20054C, "data-field-custom-value_9"}, {0x20054D, "data-field-custom-value_10"}, {0x20054E, "data-field-custom-value_11"}, {0x20054F, "data-field-custom-value_12"}, {0x200550, "data-field-custom-value_13"}, {0x200551, "data-field-custom-value_14"}, {0x200552, "data-field-custom-value_15"}, {0x200553, "data-field-custom-value_16"}, {0x200554, "data-field-custom-value_17"}, {0x200555, "data-field-custom-value_18"}, {0x200556, "data-field-custom-value_19"}, {0x200557, "data-field-custom-value_20"}, {0x200558, "data-field-custom-value_21"}, {0x200559, "data-field-custom-value_22"}, {0x20055A, "data-field-custom-value_23"}, {0x20055B, "data-field-custom-value_24"}, {0x20055C, "data-field-custom-value_25"}, {0x20055D, "data-field-custom-value_26"}, {0x20055E, "data-field-custom-value_27"}, {0x20055F, "data-field-custom-value_28"}, }; static int usage_id_cmp(const void *p1, const void *p2) { if (*(int *)p1 < *(int *)p2) return -1; if (*(int *)p1 > *(int *)p2) return 1; return 0; } static ssize_t enable_sensor_show(struct device *dev, struct device_attribute *attr, char *buf) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); return sprintf(buf, "%d\n", sensor_inst->enable); } static int set_power_report_state(struct hid_sensor_custom *sensor_inst, bool state) { int power_val = -1; int report_val = -1; u32 power_state_usage_id; u32 report_state_usage_id; int ret; /* * It is possible that the power/report state ids are not present. * In this case this function will return success. But if the * ids are present, then it will return error if set fails. */ if (state) { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D0_FULL_POWER_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_ALL_EVENTS_ENUM; } else { power_state_usage_id = HID_USAGE_SENSOR_PROP_POWER_STATE_D4_POWER_OFF_ENUM; report_state_usage_id = HID_USAGE_SENSOR_PROP_REPORTING_STATE_NO_EVENTS_ENUM; } if (sensor_inst->power_state) power_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, power_state_usage_id); if (sensor_inst->report_state) report_val = hid_sensor_get_usage_index(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, report_state_usage_id); if (power_val >= 0) { power_val += sensor_inst->power_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->power_state->attribute.report_id, sensor_inst->power_state->attribute.index, sizeof(power_val), &power_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set power state failed\n"); return ret; } } if (report_val >= 0) { report_val += sensor_inst->report_state->attribute.logical_minimum; ret = sensor_hub_set_feature(sensor_inst->hsdev, sensor_inst->report_state->attribute.report_id, sensor_inst->report_state->attribute.index, sizeof(report_val), &report_val); if (ret) { hid_err(sensor_inst->hsdev->hdev, "Set report state failed\n"); return ret; } } return 0; } static ssize_t enable_sensor_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int value; int ret = -EINVAL; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; mutex_lock(&sensor_inst->mutex); if (value && !sensor_inst->enable) { ret = sensor_hub_device_open(sensor_inst->hsdev); if (ret) goto unlock_state; ret = set_power_report_state(sensor_inst, true); if (ret) { sensor_hub_device_close(sensor_inst->hsdev); goto unlock_state; } sensor_inst->enable = true; } else if (!value && sensor_inst->enable) { ret = set_power_report_state(sensor_inst, false); sensor_hub_device_close(sensor_inst->hsdev); sensor_inst->enable = false; } unlock_state: mutex_unlock(&sensor_inst->mutex); if (ret < 0) return ret; return count; } static DEVICE_ATTR_RW(enable_sensor); static struct attribute *enable_sensor_attrs[] = { &dev_attr_enable_sensor.attr, NULL, }; static const struct attribute_group enable_sensor_attr_group = { .attrs = enable_sensor_attrs, }; static ssize_t show_value(struct device *dev, struct device_attribute *attr, char *buf) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); struct hid_sensor_hub_attribute_info *attribute; int index, usage, field_index; char name[HID_CUSTOM_NAME_LENGTH]; bool feature = false; bool input = false; int value = 0; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { feature = true; field_index = index + sensor_inst->input_field_count; } else if (sscanf(attr->attr.name, "input-%x-%x-%s", &index, &usage, name) == 3) { input = true; field_index = index; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; int ret; attribute = &sensor_inst->fields[field_index].attribute; report_id = attribute->report_id; if (feature) { u8 values[HID_CUSTOM_MAX_FEATURE_BYTES]; int len = 0; u64 value = 0; int i = 0; ret = sensor_hub_get_feature(sensor_inst->hsdev, report_id, index, sizeof(values), values); if (ret < 0) return ret; while (i < ret) { if (i + attribute->size > ret) { len += scnprintf(&buf[len], PAGE_SIZE - len, "%d ", values[i]); break; } switch (attribute->size) { case 2: value = (u64) *(u16 *)&values[i]; i += attribute->size; break; case 4: value = (u64) *(u32 *)&values[i]; i += attribute->size; break; case 8: value = *(u64 *)&values[i]; i += attribute->size; break; default: value = (u64) values[i]; ++i; break; } len += scnprintf(&buf[len], PAGE_SIZE - len, "%lld ", value); } len += scnprintf(&buf[len], PAGE_SIZE - len, "\n"); return len; } else if (input) value = sensor_hub_input_attr_get_raw_value( sensor_inst->hsdev, sensor_inst->hsdev->usage, usage, report_id, SENSOR_HUB_SYNC, false); } else if (!strncmp(name, "units", strlen("units"))) value = sensor_inst->fields[field_index].attribute.units; else if (!strncmp(name, "unit-expo", strlen("unit-expo"))) value = sensor_inst->fields[field_index].attribute.unit_expo; else if (!strncmp(name, "size", strlen("size"))) value = sensor_inst->fields[field_index].attribute.size; else if (!strncmp(name, "minimum", strlen("minimum"))) value = sensor_inst->fields[field_index].attribute. logical_minimum; else if (!strncmp(name, "maximum", strlen("maximum"))) value = sensor_inst->fields[field_index].attribute. logical_maximum; else if (!strncmp(name, "name", strlen("name"))) { struct hid_custom_usage_desc *usage_desc; usage_desc = bsearch(&usage, hid_custom_usage_desc_table, ARRAY_SIZE(hid_custom_usage_desc_table), sizeof(struct hid_custom_usage_desc), usage_id_cmp); if (usage_desc) return snprintf(buf, PAGE_SIZE, "%s\n", usage_desc->desc); else return sprintf(buf, "not-specified\n"); } else return -EINVAL; return sprintf(buf, "%d\n", value); } static ssize_t store_value(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct hid_sensor_custom *sensor_inst = dev_get_drvdata(dev); int index, field_index, usage; char name[HID_CUSTOM_NAME_LENGTH]; int value, ret; if (sscanf(attr->attr.name, "feature-%x-%x-%s", &index, &usage, name) == 3) { field_index = index + sensor_inst->input_field_count; } else return -EINVAL; if (!strncmp(name, "value", strlen("value"))) { u32 report_id; if (kstrtoint(buf, 0, &value) != 0) return -EINVAL; report_id = sensor_inst->fields[field_index].attribute. report_id; ret = sensor_hub_set_feature(sensor_inst->hsdev, report_id, index, sizeof(value), &value); if (ret) return ret; } else return -EINVAL; return count; } static int hid_sensor_capture_sample(struct hid_sensor_hub_device *hsdev, unsigned usage_id, size_t raw_len, char *raw_data, void *priv) { struct hid_sensor_custom *sensor_inst = platform_get_drvdata(priv); struct hid_sensor_sample header; /* If any error occurs in a sample, rest of the fields are ignored */ if (sensor_inst->input_skip_sample) { hid_err(sensor_inst->hsdev->hdev, "Skipped remaining data\n"); return 0; } hid_dbg(sensor_inst->hsdev->hdev, "%s received %d of %d\n", __func__, (int) (sensor_inst->input_report_recd_size + raw_len), sensor_inst->input_report_size); if (!test_bit(0, &sensor_inst->misc_opened)) return 0; if (!sensor_inst->input_report_recd_size) { int required_size = sizeof(struct hid_sensor_sample) + sensor_inst->input_report_size; header.usage_id = hsdev->usage; header.raw_len = sensor_inst->input_report_size; header.timestamp = ktime_get_real_ns(); if (kfifo_avail(&sensor_inst->data_fifo) >= required_size) { kfifo_in(&sensor_inst->data_fifo, (unsigned char *)&header, sizeof(header)); } else sensor_inst->input_skip_sample = true; } if (kfifo_avail(&sensor_inst->data_fifo) >= raw_len) kfifo_in(&sensor_inst->data_fifo, (unsigned char *)raw_data, raw_len); sensor_inst->input_report_recd_size += raw_len; return 0; } static int hid_sensor_send_event(struct hid_sensor_hub_device *hsdev, unsigned usage_id, void *priv) { 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 stream_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); } /* luid defined in FW (e.g. ISH). Maybe used to identify sensor. */ static const char *const known_sensor_luid[] = { "020B000000000000" }; static int get_luid_table_index(unsigned char *usage_str) { int i; for (i = 0; i < ARRAY_SIZE(known_sensor_luid); i++) { if (!strncmp(usage_str, known_sensor_luid[i], strlen(known_sensor_luid[i]))) return i; } return -ENODEV; } static int get_known_custom_sensor_index(struct hid_sensor_hub_device *hsdev) { struct hid_sensor_hub_attribute_info sensor_manufacturer = { 0 }; struct hid_sensor_hub_attribute_info sensor_luid_info = { 0 }; int report_size; int ret; static u16 w_buf[HID_CUSTOM_MAX_FEATURE_BYTES]; static char buf[HID_CUSTOM_MAX_FEATURE_BYTES]; int i; memset(w_buf, 0, sizeof(w_buf)); memset(buf, 0, sizeof(buf)); /* get manufacturer info */ ret = sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, hsdev->usage, HID_USAGE_SENSOR_PROP_MANUFACTURER, &sensor_manufacturer); if (ret < 0) return ret; report_size = sensor_hub_get_feature(hsdev, sensor_manufacturer.report_id, sensor_manufacturer.index, sizeof(w_buf), w_buf); if (report_size <= 0) { hid_err(hsdev->hdev, "Failed to get sensor manufacturer info %d\n", report_size); return -ENODEV; } /* convert from wide char to char */ for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) buf[i] = (char)w_buf[i]; /* ensure it's ISH sensor */ if (strncmp(buf, "INTEL", strlen("INTEL"))) return -ENODEV; memset(w_buf, 0, sizeof(w_buf)); memset(buf, 0, sizeof(buf)); /* get real usage id */ ret = sensor_hub_input_get_attribute_info(hsdev, HID_FEATURE_REPORT, hsdev->usage, HID_USAGE_SENSOR_PROP_SERIAL_NUM, &sensor_luid_info); if (ret < 0) return ret; report_size = sensor_hub_get_feature(hsdev, sensor_luid_info.report_id, sensor_luid_info.index, sizeof(w_buf), w_buf); if (report_size <= 0) { hid_err(hsdev->hdev, "Failed to get real usage info %d\n", report_size); return -ENODEV; } /* convert from wide char to char */ for (i = 0; i < ARRAY_SIZE(buf) - 1 && w_buf[i]; i++) buf[i] = (char)w_buf[i]; if (strlen(buf) != strlen(known_sensor_luid[0]) + 5) { hid_err(hsdev->hdev, "%s luid length not match %zu != (%zu + 5)\n", __func__, strlen(buf), strlen(known_sensor_luid[0])); return -ENODEV; } /* get table index with luid (not matching 'LUID: ' in luid) */ return get_luid_table_index(&buf[5]); } static struct platform_device * hid_sensor_register_platform_device(struct platform_device *pdev, struct hid_sensor_hub_device *hsdev, int index) { char real_usage[HID_SENSOR_USAGE_LENGTH] = { 0 }; struct platform_device *custom_pdev; const char *dev_name; char *c; /* copy real usage id */ memcpy(real_usage, known_sensor_luid[index], 4); /* usage id are all lowcase */ for (c = real_usage; *c != '\0'; c++) *c = tolower(*c); /* HID-SENSOR-INT-REAL_USAGE_ID */ dev_name = kasprintf(GFP_KERNEL, "HID-SENSOR-INT-%s", real_usage); if (!dev_name) return ERR_PTR(-ENOMEM); custom_pdev = platform_device_register_data(pdev->dev.parent, dev_name, PLATFORM_DEVID_NONE, hsdev, sizeof(*hsdev)); kfree(dev_name); return custom_pdev; } 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; int index; 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); index = get_known_custom_sensor_index(hsdev); if (index >= 0 && index < ARRAY_SIZE(known_sensor_luid)) { sensor_inst->custom_pdev = hid_sensor_register_platform_device(pdev, hsdev, index); ret = PTR_ERR_OR_ZERO(sensor_inst->custom_pdev); if (ret) { dev_err(&pdev->dev, "register_platform_device failed\n"); return ret; } return 0; } 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; if (sensor_inst->custom_pdev) { platform_device_unregister(sensor_inst->custom_pdev); return 0; } 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 "); MODULE_LICENSE("GPL");