--- /dev/null
+/*
+ * HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
+ *
+ * Copyright (c) 2012 Bernhard Seibold
+ */
+
+/*
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/sysfs.h>
+#include <linux/device.h>
+#include <linux/usb.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/leds.h>
+#include "usbhid/usbhid.h"
+
+#include "hid-ids.h"
+
+/* This is only used for the trackpoint part of the driver, hence _tp */
+struct tpkbd_data_pointer {
+ int led_state;
+ struct led_classdev led_mute;
+ struct led_classdev led_micmute;
+ int press_to_select;
+ int dragging;
+ int release_to_select;
+ int select_right;
+ int sensitivity;
+ int press_speed;
+};
+
+#define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
+
+static int tpkbd_input_mapping(struct hid_device *hdev,
+ struct hid_input *hi, struct hid_field *field,
+ struct hid_usage *usage, unsigned long **bit, int *max)
+{
+ struct usbhid_device *uhdev;
+
+ uhdev = (struct usbhid_device *) hdev->driver_data;
+ if (uhdev->ifnum == 1 && usage->hid == (HID_UP_BUTTON | 0x0010)) {
+ map_key_clear(KEY_MICMUTE);
+ return 1;
+ }
+ return 0;
+}
+
+#undef map_key_clear
+
+static int tpkbd_features_set(struct hid_device *hdev)
+{
+ struct hid_report *report;
+ struct tpkbd_data_pointer *data_pointer;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+ report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[4];
+
+ report->field[0]->value[0] = data_pointer->press_to_select ? 0x01 : 0x02;
+ report->field[0]->value[0] |= data_pointer->dragging ? 0x04 : 0x08;
+ report->field[0]->value[0] |= data_pointer->release_to_select ? 0x10 : 0x20;
+ report->field[0]->value[0] |= data_pointer->select_right ? 0x80 : 0x40;
+ report->field[1]->value[0] = 0x03; // unknown setting, imitate windows driver
+ report->field[2]->value[0] = data_pointer->sensitivity;
+ report->field[3]->value[0] = data_pointer->press_speed;
+
+ usbhid_submit_report(hdev, report, USB_DIR_OUT);
+ return 0;
+}
+
+static ssize_t pointer_press_to_select_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
+}
+
+static ssize_t pointer_press_to_select_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+ if (value < 0 || value > 1)
+ return -EINVAL;
+
+ data_pointer->press_to_select = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static ssize_t pointer_dragging_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
+}
+
+static ssize_t pointer_dragging_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+ if (value < 0 || value > 1)
+ return -EINVAL;
+
+ data_pointer->dragging = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static ssize_t pointer_release_to_select_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
+}
+
+static ssize_t pointer_release_to_select_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+ if (value < 0 || value > 1)
+ return -EINVAL;
+
+ data_pointer->release_to_select = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static ssize_t pointer_select_right_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
+}
+
+static ssize_t pointer_select_right_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value))
+ return -EINVAL;
+ if (value < 0 || value > 1)
+ return -EINVAL;
+
+ data_pointer->select_right = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static ssize_t pointer_sensitivity_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data_pointer->sensitivity);
+}
+
+static ssize_t pointer_sensitivity_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
+ return -EINVAL;
+
+ data_pointer->sensitivity = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static ssize_t pointer_press_speed_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ return snprintf(buf, PAGE_SIZE, "%u\n",
+ data_pointer->press_speed);
+}
+
+static ssize_t pointer_press_speed_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int value;
+
+ hdev = container_of(dev, struct hid_device, dev);
+ if (hdev == NULL)
+ return -ENODEV;
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
+ return -EINVAL;
+
+ data_pointer->press_speed = value;
+ tpkbd_features_set(hdev);
+
+ return count;
+}
+
+static struct device_attribute dev_attr_pointer_press_to_select =
+ __ATTR(press_to_select, S_IWUSR | S_IRUGO,
+ pointer_press_to_select_show,
+ pointer_press_to_select_store);
+
+static struct device_attribute dev_attr_pointer_dragging =
+ __ATTR(dragging, S_IWUSR | S_IRUGO,
+ pointer_dragging_show,
+ pointer_dragging_store);
+
+static struct device_attribute dev_attr_pointer_release_to_select =
+ __ATTR(release_to_select, S_IWUSR | S_IRUGO,
+ pointer_release_to_select_show,
+ pointer_release_to_select_store);
+
+static struct device_attribute dev_attr_pointer_select_right =
+ __ATTR(select_right, S_IWUSR | S_IRUGO,
+ pointer_select_right_show,
+ pointer_select_right_store);
+
+static struct device_attribute dev_attr_pointer_sensitivity =
+ __ATTR(sensitivity, S_IWUSR | S_IRUGO,
+ pointer_sensitivity_show,
+ pointer_sensitivity_store);
+
+static struct device_attribute dev_attr_pointer_press_speed =
+ __ATTR(press_speed, S_IWUSR | S_IRUGO,
+ pointer_press_speed_show,
+ pointer_press_speed_store);
+
+static struct attribute *tpkbd_attributes_pointer[] = {
+ &dev_attr_pointer_press_to_select.attr,
+ &dev_attr_pointer_dragging.attr,
+ &dev_attr_pointer_release_to_select.attr,
+ &dev_attr_pointer_select_right.attr,
+ &dev_attr_pointer_sensitivity.attr,
+ &dev_attr_pointer_press_speed.attr,
+ NULL
+};
+
+static const struct attribute_group tpkbd_attr_group_pointer = {
+ .attrs = tpkbd_attributes_pointer,
+};
+
+static enum led_brightness tpkbd_led_brightness_get(
+ struct led_classdev *led_cdev)
+{
+ struct device *dev;
+ struct hid_device *hdev;
+ struct tpkbd_data_pointer *data_pointer;
+ int led_nr = 0;
+
+ dev = led_cdev->dev->parent;
+ hdev = container_of(dev, struct hid_device, dev);
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (led_cdev == &data_pointer->led_micmute)
+ led_nr = 1;
+
+ return data_pointer->led_state & (1 << led_nr)
+ ? LED_FULL
+ : LED_OFF;
+}
+
+static void tpkbd_led_brightness_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct device *dev;
+ struct hid_device *hdev;
+ struct hid_report *report;
+ struct tpkbd_data_pointer *data_pointer;
+ int led_nr = 0;
+
+ dev = led_cdev->dev->parent;
+ hdev = container_of(dev, struct hid_device, dev);
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ if (led_cdev == &data_pointer->led_micmute)
+ led_nr = 1;
+
+ if (value == LED_OFF)
+ data_pointer->led_state &= ~(1 << led_nr);
+ else
+ data_pointer->led_state |= 1 << led_nr;
+
+ report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[3];
+ report->field[0]->value[0] = (data_pointer->led_state >> 0) & 1;
+ report->field[0]->value[1] = (data_pointer->led_state >> 1) & 1;
+ usbhid_submit_report(hdev, report, USB_DIR_OUT);
+}
+
+static int tpkbd_probe_tp(struct hid_device *hdev)
+{
+ struct device *dev = &hdev->dev;
+ struct tpkbd_data_pointer *data_pointer;
+ size_t name_sz = strlen(dev_name(dev)) + 16;
+ char *name_mute, *name_micmute;
+ int ret;
+
+ if (sysfs_create_group(&hdev->dev.kobj,
+ &tpkbd_attr_group_pointer)) {
+ hid_warn(hdev, "Could not create sysfs group\n");
+ }
+
+ data_pointer = kzalloc(sizeof(struct tpkbd_data_pointer), GFP_KERNEL);
+ if (data_pointer == NULL) {
+ hid_err(hdev, "Could not allocate memory for driver data\n");
+ return -ENOMEM;
+ }
+
+ // set same default values as windows driver
+ data_pointer->sensitivity = 0xa0;
+ data_pointer->press_speed = 0x38;
+
+ name_mute = kzalloc(name_sz, GFP_KERNEL);
+ if (name_mute == NULL) {
+ hid_err(hdev, "Could not allocate memory for led data\n");
+ ret = -ENOMEM;
+ goto err;
+ }
+ snprintf(name_mute, name_sz, "%s:amber:mute", dev_name(dev));
+
+ name_micmute = kzalloc(name_sz, GFP_KERNEL);
+ if (name_micmute == NULL) {
+ hid_err(hdev, "Could not allocate memory for led data\n");
+ ret = -ENOMEM;
+ goto err2;
+ }
+ snprintf(name_micmute, name_sz, "%s:amber:micmute", dev_name(dev));
+
+ hid_set_drvdata(hdev, data_pointer);
+
+ data_pointer->led_mute.name = name_mute;
+ data_pointer->led_mute.brightness_get = tpkbd_led_brightness_get;
+ data_pointer->led_mute.brightness_set = tpkbd_led_brightness_set;
+ data_pointer->led_mute.dev = dev;
+ led_classdev_register(dev, &data_pointer->led_mute);
+
+ data_pointer->led_micmute.name = name_micmute;
+ data_pointer->led_micmute.brightness_get = tpkbd_led_brightness_get;
+ data_pointer->led_micmute.brightness_set = tpkbd_led_brightness_set;
+ data_pointer->led_micmute.dev = dev;
+ led_classdev_register(dev, &data_pointer->led_micmute);
+
+ tpkbd_features_set(hdev);
+
+ return 0;
+
+err2:
+ kfree(name_mute);
+err:
+ kfree(data_pointer);
+ return ret;
+}
+
+static int tpkbd_probe(struct hid_device *hdev,
+ const struct hid_device_id *id)
+{
+ int ret;
+ struct usbhid_device *uhdev;
+
+ ret = hid_parse(hdev);
+ if (ret) {
+ hid_err(hdev, "hid_parse failed\n");
+ goto err_free;
+ }
+
+ ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+ if (ret) {
+ hid_err(hdev, "hid_hw_start failed\n");
+ goto err_free;
+ }
+
+ uhdev = (struct usbhid_device *) hdev->driver_data;
+
+ if (uhdev->ifnum == 1)
+ return tpkbd_probe_tp(hdev);
+
+ return 0;
+err_free:
+ return ret;
+}
+
+static void tpkbd_remove_tp(struct hid_device *hdev)
+{
+ struct tpkbd_data_pointer *data_pointer;
+
+ sysfs_remove_group(&hdev->dev.kobj,
+ &tpkbd_attr_group_pointer);
+
+ data_pointer = (struct tpkbd_data_pointer *) hid_get_drvdata(hdev);
+
+ led_classdev_unregister(&data_pointer->led_micmute);
+ led_classdev_unregister(&data_pointer->led_mute);
+
+ hid_set_drvdata(hdev, NULL);
+ kfree(data_pointer);
+}
+
+static void tpkbd_remove(struct hid_device *hdev)
+{
+ struct usbhid_device *uhdev;
+
+ uhdev = (struct usbhid_device *) hdev->driver_data;
+ if (uhdev->ifnum == 1)
+ tpkbd_remove_tp(hdev);
+
+ hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id tpkbd_devices[] = {
+ { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
+ { }
+};
+
+MODULE_DEVICE_TABLE(hid, tpkbd_devices);
+
+static struct hid_driver tpkbd_driver = {
+ .name = "lenovo_tpkbd",
+ .id_table = tpkbd_devices,
+ .input_mapping = tpkbd_input_mapping,
+ .probe = tpkbd_probe,
+ .remove = tpkbd_remove,
+};
+
+static int __init tpkbd_init(void)
+{
+ return hid_register_driver(&tpkbd_driver);
+}
+
+static void __exit tpkbd_exit(void)
+{
+ hid_unregister_driver(&tpkbd_driver);
+}
+
+module_init(tpkbd_init);
+module_exit(tpkbd_exit);
+
+MODULE_LICENSE("GPL");
projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / commitdiff