HID: ntrig: add sysfs access to filter parameters
This should make it a little more convenient to tweak the filtering parameters on the fly. Also unlike load-time parameters, this provides independent tuning for each device conntected. Signed-off-by: Rafi Rubin <rafi@seas.upenn.edu> Signed-off-by: Jiri Kosina <jkosina@suse.cz>hifive-unleashed-5.1
Rafi Rubin
Jiri Kosina
parent
369db2a600
commit
eab32f5f65
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@ -68,6 +68,287 @@ struct ntrig_data {
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__u16 sensor_physical_height;
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};
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static ssize_t show_phys_width(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->sensor_physical_width);
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}
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static DEVICE_ATTR(sensor_physical_width, S_IRUGO, show_phys_width, NULL);
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static ssize_t show_phys_height(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->sensor_physical_height);
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}
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static DEVICE_ATTR(sensor_physical_height, S_IRUGO, show_phys_height, NULL);
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static ssize_t show_log_width(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->sensor_logical_width);
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}
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static DEVICE_ATTR(sensor_logical_width, S_IRUGO, show_log_width, NULL);
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static ssize_t show_log_height(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->sensor_logical_height);
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}
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static DEVICE_ATTR(sensor_logical_height, S_IRUGO, show_log_height, NULL);
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static ssize_t show_min_width(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->min_width *
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nd->sensor_physical_width /
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nd->sensor_logical_width);
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}
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static ssize_t set_min_width(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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if (val > nd->sensor_physical_width)
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return -EINVAL;
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nd->min_width = val * nd->sensor_logical_width /
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nd->sensor_physical_width;
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return count;
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}
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static DEVICE_ATTR(min_width, S_IWUSR | S_IRUGO, show_min_width, set_min_width);
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static ssize_t show_min_height(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->min_height *
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nd->sensor_physical_height /
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nd->sensor_logical_height);
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}
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static ssize_t set_min_height(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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if (val > nd->sensor_physical_height)
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return -EINVAL;
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nd->min_height = val * nd->sensor_logical_height /
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nd->sensor_physical_height;
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return count;
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}
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static DEVICE_ATTR(min_height, S_IWUSR | S_IRUGO, show_min_height,
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set_min_height);
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static ssize_t show_activate_slack(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->activate_slack);
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}
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static ssize_t set_activate_slack(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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if (val > 0x7f)
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return -EINVAL;
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nd->activate_slack = val;
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return count;
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}
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static DEVICE_ATTR(activate_slack, S_IWUSR | S_IRUGO, show_activate_slack,
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set_activate_slack);
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static ssize_t show_activation_width(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->activation_width *
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nd->sensor_physical_width /
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nd->sensor_logical_width);
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}
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static ssize_t set_activation_width(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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if (val > nd->sensor_physical_width)
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return -EINVAL;
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nd->activation_width = val * nd->sensor_logical_width /
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nd->sensor_physical_width;
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return count;
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}
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static DEVICE_ATTR(activation_width, S_IWUSR | S_IRUGO, show_activation_width,
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set_activation_width);
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static ssize_t show_activation_height(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", nd->activation_height *
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nd->sensor_physical_height /
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nd->sensor_logical_height);
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}
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static ssize_t set_activation_height(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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if (val > nd->sensor_physical_height)
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return -EINVAL;
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nd->activation_height = val * nd->sensor_logical_height /
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nd->sensor_physical_height;
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return count;
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}
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static DEVICE_ATTR(activation_height, S_IWUSR | S_IRUGO,
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show_activation_height, set_activation_height);
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static ssize_t show_deactivate_slack(struct device *dev,
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struct device_attribute *attr,
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char *buf)
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{
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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return sprintf(buf, "%d\n", -nd->deactivate_slack);
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}
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static ssize_t set_deactivate_slack(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_device *hdev = container_of(dev, struct hid_device, dev);
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struct ntrig_data *nd = hid_get_drvdata(hdev);
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unsigned long val;
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if (strict_strtoul(buf, 0, &val))
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return -EINVAL;
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/*
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* No more than 8 terminal frames have been observed so far
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* and higher slack is highly likely to leave the single
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* touch emulation stuck down.
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*/
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if (val > 7)
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return -EINVAL;
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nd->deactivate_slack = -val;
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return count;
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}
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static DEVICE_ATTR(deactivate_slack, S_IWUSR | S_IRUGO, show_deactivate_slack,
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set_deactivate_slack);
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static struct attribute *sysfs_attrs[] = {
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&dev_attr_sensor_physical_width.attr,
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&dev_attr_sensor_physical_height.attr,
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&dev_attr_sensor_logical_width.attr,
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&dev_attr_sensor_logical_height.attr,
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&dev_attr_min_height.attr,
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&dev_attr_min_width.attr,
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&dev_attr_activate_slack.attr,
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&dev_attr_activation_width.attr,
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&dev_attr_activation_height.attr,
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&dev_attr_deactivate_slack.attr,
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NULL
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};
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static struct attribute_group ntrig_attribute_group = {
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.attrs = sysfs_attrs
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};
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/*
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* this driver is aimed at two firmware versions in circulation:
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* - dual pen/finger single touch
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@ -546,6 +827,8 @@ static int ntrig_probe(struct hid_device *hdev, const struct hid_device_id *id)
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if (report)
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usbhid_submit_report(hdev, report, USB_DIR_OUT);
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ret = sysfs_create_group(&hdev->dev.kobj,
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&ntrig_attribute_group);
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return 0;
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err_free:
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@ -555,6 +838,8 @@ err_free:
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static void ntrig_remove(struct hid_device *hdev)
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{
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sysfs_remove_group(&hdev->dev.kobj,
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&ntrig_attribute_group);
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hid_hw_stop(hdev);
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kfree(hid_get_drvdata(hdev));
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}
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