1 files changed, 564 insertions, 0 deletions

diff --git a/drivers/hid/hid-lenovo-tpkbd.c b/drivers/hid/hid-lenovo-tpkbd.c
new file mode 100644
index 000000000000..77d2df04c97b
--- /dev/null
+++ b/drivers/hid/hid-lenovo-tpkbd.c
@@ -0,0 +1,564 @@
+/*
+ *  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");