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![Benjamin Tissoires](/assets/img/avatar_default.png)
lenovo tpkbd currently relies on the usb interface number to detect if it is dealing with the touchpad interface or not. As the report descriptors of the interface 0 does not contain the button 3, we can use this to remove the need to check for usb. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
462 lines
12 KiB
C
462 lines
12 KiB
C
/*
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* HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
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*
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* Copyright (c) 2012 Bernhard Seibold
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*/
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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 of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*/
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#include <linux/module.h>
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#include <linux/sysfs.h>
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#include <linux/device.h>
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#include <linux/hid.h>
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#include <linux/input.h>
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#include <linux/leds.h>
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#include "hid-ids.h"
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/* This is only used for the trackpoint part of the driver, hence _tp */
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struct tpkbd_data_pointer {
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int led_state;
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struct led_classdev led_mute;
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struct led_classdev led_micmute;
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int press_to_select;
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int dragging;
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int release_to_select;
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int select_right;
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int sensitivity;
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int press_speed;
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};
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#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
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static int tpkbd_input_mapping(struct hid_device *hdev,
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struct hid_input *hi, struct hid_field *field,
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struct hid_usage *usage, unsigned long **bit, int *max)
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{
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if (usage->hid == (HID_UP_BUTTON | 0x0010)) {
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/* mark the device as pointer */
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hid_set_drvdata(hdev, (void *)1);
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map_key_clear(KEY_MICMUTE);
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return 1;
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}
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return 0;
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}
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#undef map_key_clear
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static int tpkbd_features_set(struct hid_device *hdev)
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{
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struct hid_report *report;
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struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[4];
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report->field[0]->value[0] = data_pointer->press_to_select ? 0x01 : 0x02;
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report->field[0]->value[0] |= data_pointer->dragging ? 0x04 : 0x08;
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report->field[0]->value[0] |= data_pointer->release_to_select ? 0x10 : 0x20;
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report->field[0]->value[0] |= data_pointer->select_right ? 0x80 : 0x40;
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report->field[1]->value[0] = 0x03; // unknown setting, imitate windows driver
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report->field[2]->value[0] = data_pointer->sensitivity;
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report->field[3]->value[0] = data_pointer->press_speed;
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hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
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return 0;
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}
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static ssize_t pointer_press_to_select_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
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}
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static ssize_t pointer_press_to_select_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value))
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return -EINVAL;
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if (value < 0 || value > 1)
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return -EINVAL;
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data_pointer->press_to_select = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static ssize_t pointer_dragging_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
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}
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static ssize_t pointer_dragging_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value))
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return -EINVAL;
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if (value < 0 || value > 1)
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return -EINVAL;
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data_pointer->dragging = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static ssize_t pointer_release_to_select_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
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}
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static ssize_t pointer_release_to_select_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value))
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return -EINVAL;
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if (value < 0 || value > 1)
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return -EINVAL;
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data_pointer->release_to_select = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static ssize_t pointer_select_right_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
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}
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static ssize_t pointer_select_right_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value))
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return -EINVAL;
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if (value < 0 || value > 1)
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return -EINVAL;
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data_pointer->select_right = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static ssize_t pointer_sensitivity_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n",
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data_pointer->sensitivity);
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}
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static ssize_t pointer_sensitivity_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
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return -EINVAL;
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data_pointer->sensitivity = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static ssize_t pointer_press_speed_show(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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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return snprintf(buf, PAGE_SIZE, "%u\n",
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data_pointer->press_speed);
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}
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static ssize_t pointer_press_speed_store(struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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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 tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int value;
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if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
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return -EINVAL;
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data_pointer->press_speed = value;
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tpkbd_features_set(hdev);
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return count;
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}
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static struct device_attribute dev_attr_pointer_press_to_select =
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__ATTR(press_to_select, S_IWUSR | S_IRUGO,
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pointer_press_to_select_show,
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pointer_press_to_select_store);
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static struct device_attribute dev_attr_pointer_dragging =
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__ATTR(dragging, S_IWUSR | S_IRUGO,
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pointer_dragging_show,
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pointer_dragging_store);
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static struct device_attribute dev_attr_pointer_release_to_select =
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__ATTR(release_to_select, S_IWUSR | S_IRUGO,
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pointer_release_to_select_show,
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pointer_release_to_select_store);
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static struct device_attribute dev_attr_pointer_select_right =
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__ATTR(select_right, S_IWUSR | S_IRUGO,
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pointer_select_right_show,
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pointer_select_right_store);
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static struct device_attribute dev_attr_pointer_sensitivity =
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__ATTR(sensitivity, S_IWUSR | S_IRUGO,
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pointer_sensitivity_show,
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pointer_sensitivity_store);
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static struct device_attribute dev_attr_pointer_press_speed =
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__ATTR(press_speed, S_IWUSR | S_IRUGO,
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pointer_press_speed_show,
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pointer_press_speed_store);
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static struct attribute *tpkbd_attributes_pointer[] = {
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&dev_attr_pointer_press_to_select.attr,
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&dev_attr_pointer_dragging.attr,
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&dev_attr_pointer_release_to_select.attr,
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&dev_attr_pointer_select_right.attr,
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&dev_attr_pointer_sensitivity.attr,
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&dev_attr_pointer_press_speed.attr,
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NULL
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};
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static const struct attribute_group tpkbd_attr_group_pointer = {
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.attrs = tpkbd_attributes_pointer,
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};
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static enum led_brightness tpkbd_led_brightness_get(
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struct led_classdev *led_cdev)
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{
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struct device *dev = led_cdev->dev->parent;
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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int led_nr = 0;
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if (led_cdev == &data_pointer->led_micmute)
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led_nr = 1;
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return data_pointer->led_state & (1 << led_nr)
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? LED_FULL
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: LED_OFF;
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}
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static void tpkbd_led_brightness_set(struct led_classdev *led_cdev,
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enum led_brightness value)
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{
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struct device *dev = led_cdev->dev->parent;
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struct hid_device *hdev = container_of(dev, struct hid_device, dev);
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struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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struct hid_report *report;
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int led_nr = 0;
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if (led_cdev == &data_pointer->led_micmute)
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led_nr = 1;
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if (value == LED_OFF)
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data_pointer->led_state &= ~(1 << led_nr);
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else
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data_pointer->led_state |= 1 << led_nr;
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report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[3];
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report->field[0]->value[0] = (data_pointer->led_state >> 0) & 1;
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report->field[0]->value[1] = (data_pointer->led_state >> 1) & 1;
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hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
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}
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static int tpkbd_probe_tp(struct hid_device *hdev)
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{
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struct device *dev = &hdev->dev;
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struct tpkbd_data_pointer *data_pointer;
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size_t name_sz = strlen(dev_name(dev)) + 16;
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char *name_mute, *name_micmute;
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int i;
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/* Validate required reports. */
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for (i = 0; i < 4; i++) {
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if (!hid_validate_values(hdev, HID_FEATURE_REPORT, 4, i, 1))
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return -ENODEV;
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}
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if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 3, 0, 2))
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return -ENODEV;
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if (sysfs_create_group(&hdev->dev.kobj,
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&tpkbd_attr_group_pointer)) {
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hid_warn(hdev, "Could not create sysfs group\n");
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}
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data_pointer = devm_kzalloc(&hdev->dev,
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sizeof(struct tpkbd_data_pointer),
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GFP_KERNEL);
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if (data_pointer == NULL) {
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hid_err(hdev, "Could not allocate memory for driver data\n");
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return -ENOMEM;
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}
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// set same default values as windows driver
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data_pointer->sensitivity = 0xa0;
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data_pointer->press_speed = 0x38;
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name_mute = devm_kzalloc(&hdev->dev, name_sz, GFP_KERNEL);
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name_micmute = devm_kzalloc(&hdev->dev, name_sz, GFP_KERNEL);
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if (name_mute == NULL || name_micmute == NULL) {
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hid_err(hdev, "Could not allocate memory for led data\n");
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return -ENOMEM;
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}
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snprintf(name_mute, name_sz, "%s:amber:mute", dev_name(dev));
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snprintf(name_micmute, name_sz, "%s:amber:micmute", dev_name(dev));
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hid_set_drvdata(hdev, data_pointer);
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data_pointer->led_mute.name = name_mute;
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data_pointer->led_mute.brightness_get = tpkbd_led_brightness_get;
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data_pointer->led_mute.brightness_set = tpkbd_led_brightness_set;
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data_pointer->led_mute.dev = dev;
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led_classdev_register(dev, &data_pointer->led_mute);
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data_pointer->led_micmute.name = name_micmute;
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data_pointer->led_micmute.brightness_get = tpkbd_led_brightness_get;
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data_pointer->led_micmute.brightness_set = tpkbd_led_brightness_set;
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data_pointer->led_micmute.dev = dev;
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led_classdev_register(dev, &data_pointer->led_micmute);
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tpkbd_features_set(hdev);
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return 0;
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}
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static int tpkbd_probe(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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int ret;
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ret = hid_parse(hdev);
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if (ret) {
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hid_err(hdev, "hid_parse failed\n");
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goto err;
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}
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ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
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if (ret) {
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hid_err(hdev, "hid_hw_start failed\n");
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goto err;
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}
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if (hid_get_drvdata(hdev)) {
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hid_set_drvdata(hdev, NULL);
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ret = tpkbd_probe_tp(hdev);
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if (ret)
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goto err_hid;
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}
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return 0;
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err_hid:
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hid_hw_stop(hdev);
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err:
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return ret;
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}
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static void tpkbd_remove_tp(struct hid_device *hdev)
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{
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struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
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sysfs_remove_group(&hdev->dev.kobj,
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&tpkbd_attr_group_pointer);
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led_classdev_unregister(&data_pointer->led_micmute);
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led_classdev_unregister(&data_pointer->led_mute);
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hid_set_drvdata(hdev, NULL);
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}
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static void tpkbd_remove(struct hid_device *hdev)
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{
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if (hid_get_drvdata(hdev))
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tpkbd_remove_tp(hdev);
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hid_hw_stop(hdev);
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}
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static const struct hid_device_id tpkbd_devices[] = {
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{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
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{ }
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};
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MODULE_DEVICE_TABLE(hid, tpkbd_devices);
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static struct hid_driver tpkbd_driver = {
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.name = "lenovo_tpkbd",
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.id_table = tpkbd_devices,
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.input_mapping = tpkbd_input_mapping,
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.probe = tpkbd_probe,
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.remove = tpkbd_remove,
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};
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module_hid_driver(tpkbd_driver);
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MODULE_LICENSE("GPL");
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