Version:  2.6.34 2.6.35 2.6.36 2.6.37 2.6.38 2.6.39 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14

Linux/drivers/hid/hid-lenovo-tpkbd.c

  1 /*
  2  *  HID driver for Lenovo ThinkPad USB Keyboard with TrackPoint
  3  *
  4  *  Copyright (c) 2012 Bernhard Seibold
  5  */
  6 
  7 /*
  8  * This program is free software; you can redistribute it and/or modify it
  9  * under the terms of the GNU General Public License as published by the Free
 10  * Software Foundation; either version 2 of the License, or (at your option)
 11  * any later version.
 12  */
 13 
 14 #include <linux/module.h>
 15 #include <linux/sysfs.h>
 16 #include <linux/device.h>
 17 #include <linux/hid.h>
 18 #include <linux/input.h>
 19 #include <linux/leds.h>
 20 
 21 #include "hid-ids.h"
 22 
 23 /* This is only used for the trackpoint part of the driver, hence _tp */
 24 struct tpkbd_data_pointer {
 25         int led_state;
 26         struct led_classdev led_mute;
 27         struct led_classdev led_micmute;
 28         int press_to_select;
 29         int dragging;
 30         int release_to_select;
 31         int select_right;
 32         int sensitivity;
 33         int press_speed;
 34 };
 35 
 36 #define map_key_clear(c) hid_map_usage_clear(hi, usage, bit, max, EV_KEY, (c))
 37 
 38 static int tpkbd_input_mapping(struct hid_device *hdev,
 39                 struct hid_input *hi, struct hid_field *field,
 40                 struct hid_usage *usage, unsigned long **bit, int *max)
 41 {
 42         if (usage->hid == (HID_UP_BUTTON | 0x0010)) {
 43                 /* mark the device as pointer */
 44                 hid_set_drvdata(hdev, (void *)1);
 45                 map_key_clear(KEY_MICMUTE);
 46                 return 1;
 47         }
 48         return 0;
 49 }
 50 
 51 #undef map_key_clear
 52 
 53 static int tpkbd_features_set(struct hid_device *hdev)
 54 {
 55         struct hid_report *report;
 56         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
 57 
 58         report = hdev->report_enum[HID_FEATURE_REPORT].report_id_hash[4];
 59 
 60         report->field[0]->value[0]  = data_pointer->press_to_select   ? 0x01 : 0x02;
 61         report->field[0]->value[0] |= data_pointer->dragging          ? 0x04 : 0x08;
 62         report->field[0]->value[0] |= data_pointer->release_to_select ? 0x10 : 0x20;
 63         report->field[0]->value[0] |= data_pointer->select_right      ? 0x80 : 0x40;
 64         report->field[1]->value[0] = 0x03; // unknown setting, imitate windows driver
 65         report->field[2]->value[0] = data_pointer->sensitivity;
 66         report->field[3]->value[0] = data_pointer->press_speed;
 67 
 68         hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
 69         return 0;
 70 }
 71 
 72 static ssize_t pointer_press_to_select_show(struct device *dev,
 73                 struct device_attribute *attr,
 74                 char *buf)
 75 {
 76         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 77         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
 78 
 79         return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->press_to_select);
 80 }
 81 
 82 static ssize_t pointer_press_to_select_store(struct device *dev,
 83                 struct device_attribute *attr,
 84                 const char *buf,
 85                 size_t count)
 86 {
 87         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
 88         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
 89         int value;
 90 
 91         if (kstrtoint(buf, 10, &value))
 92                 return -EINVAL;
 93         if (value < 0 || value > 1)
 94                 return -EINVAL;
 95 
 96         data_pointer->press_to_select = value;
 97         tpkbd_features_set(hdev);
 98 
 99         return count;
100 }
101 
102 static ssize_t pointer_dragging_show(struct device *dev,
103                 struct device_attribute *attr,
104                 char *buf)
105 {
106         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
107         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
108 
109         return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->dragging);
110 }
111 
112 static ssize_t pointer_dragging_store(struct device *dev,
113                 struct device_attribute *attr,
114                 const char *buf,
115                 size_t count)
116 {
117         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
118         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
119         int value;
120 
121         if (kstrtoint(buf, 10, &value))
122                 return -EINVAL;
123         if (value < 0 || value > 1)
124                 return -EINVAL;
125 
126         data_pointer->dragging = value;
127         tpkbd_features_set(hdev);
128 
129         return count;
130 }
131 
132 static ssize_t pointer_release_to_select_show(struct device *dev,
133                 struct device_attribute *attr,
134                 char *buf)
135 {
136         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
137         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
138 
139         return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->release_to_select);
140 }
141 
142 static ssize_t pointer_release_to_select_store(struct device *dev,
143                 struct device_attribute *attr,
144                 const char *buf,
145                 size_t count)
146 {
147         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
148         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
149         int value;
150 
151         if (kstrtoint(buf, 10, &value))
152                 return -EINVAL;
153         if (value < 0 || value > 1)
154                 return -EINVAL;
155 
156         data_pointer->release_to_select = value;
157         tpkbd_features_set(hdev);
158 
159         return count;
160 }
161 
162 static ssize_t pointer_select_right_show(struct device *dev,
163                 struct device_attribute *attr,
164                 char *buf)
165 {
166         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
167         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
168 
169         return snprintf(buf, PAGE_SIZE, "%u\n", data_pointer->select_right);
170 }
171 
172 static ssize_t pointer_select_right_store(struct device *dev,
173                 struct device_attribute *attr,
174                 const char *buf,
175                 size_t count)
176 {
177         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
178         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
179         int value;
180 
181         if (kstrtoint(buf, 10, &value))
182                 return -EINVAL;
183         if (value < 0 || value > 1)
184                 return -EINVAL;
185 
186         data_pointer->select_right = value;
187         tpkbd_features_set(hdev);
188 
189         return count;
190 }
191 
192 static ssize_t pointer_sensitivity_show(struct device *dev,
193                 struct device_attribute *attr,
194                 char *buf)
195 {
196         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
197         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
198 
199         return snprintf(buf, PAGE_SIZE, "%u\n",
200                 data_pointer->sensitivity);
201 }
202 
203 static ssize_t pointer_sensitivity_store(struct device *dev,
204                 struct device_attribute *attr,
205                 const char *buf,
206                 size_t count)
207 {
208         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
209         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
210         int value;
211 
212         if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
213                 return -EINVAL;
214 
215         data_pointer->sensitivity = value;
216         tpkbd_features_set(hdev);
217 
218         return count;
219 }
220 
221 static ssize_t pointer_press_speed_show(struct device *dev,
222                 struct device_attribute *attr,
223                 char *buf)
224 {
225         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
226         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
227 
228         return snprintf(buf, PAGE_SIZE, "%u\n",
229                 data_pointer->press_speed);
230 }
231 
232 static ssize_t pointer_press_speed_store(struct device *dev,
233                 struct device_attribute *attr,
234                 const char *buf,
235                 size_t count)
236 {
237         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
238         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
239         int value;
240 
241         if (kstrtoint(buf, 10, &value) || value < 1 || value > 255)
242                 return -EINVAL;
243 
244         data_pointer->press_speed = value;
245         tpkbd_features_set(hdev);
246 
247         return count;
248 }
249 
250 static struct device_attribute dev_attr_pointer_press_to_select =
251         __ATTR(press_to_select, S_IWUSR | S_IRUGO,
252                         pointer_press_to_select_show,
253                         pointer_press_to_select_store);
254 
255 static struct device_attribute dev_attr_pointer_dragging =
256         __ATTR(dragging, S_IWUSR | S_IRUGO,
257                         pointer_dragging_show,
258                         pointer_dragging_store);
259 
260 static struct device_attribute dev_attr_pointer_release_to_select =
261         __ATTR(release_to_select, S_IWUSR | S_IRUGO,
262                         pointer_release_to_select_show,
263                         pointer_release_to_select_store);
264 
265 static struct device_attribute dev_attr_pointer_select_right =
266         __ATTR(select_right, S_IWUSR | S_IRUGO,
267                         pointer_select_right_show,
268                         pointer_select_right_store);
269 
270 static struct device_attribute dev_attr_pointer_sensitivity =
271         __ATTR(sensitivity, S_IWUSR | S_IRUGO,
272                         pointer_sensitivity_show,
273                         pointer_sensitivity_store);
274 
275 static struct device_attribute dev_attr_pointer_press_speed =
276         __ATTR(press_speed, S_IWUSR | S_IRUGO,
277                         pointer_press_speed_show,
278                         pointer_press_speed_store);
279 
280 static struct attribute *tpkbd_attributes_pointer[] = {
281         &dev_attr_pointer_press_to_select.attr,
282         &dev_attr_pointer_dragging.attr,
283         &dev_attr_pointer_release_to_select.attr,
284         &dev_attr_pointer_select_right.attr,
285         &dev_attr_pointer_sensitivity.attr,
286         &dev_attr_pointer_press_speed.attr,
287         NULL
288 };
289 
290 static const struct attribute_group tpkbd_attr_group_pointer = {
291         .attrs = tpkbd_attributes_pointer,
292 };
293 
294 static enum led_brightness tpkbd_led_brightness_get(
295                         struct led_classdev *led_cdev)
296 {
297         struct device *dev = led_cdev->dev->parent;
298         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
299         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
300         int led_nr = 0;
301 
302         if (led_cdev == &data_pointer->led_micmute)
303                 led_nr = 1;
304 
305         return data_pointer->led_state & (1 << led_nr)
306                                 ? LED_FULL
307                                 : LED_OFF;
308 }
309 
310 static void tpkbd_led_brightness_set(struct led_classdev *led_cdev,
311                         enum led_brightness value)
312 {
313         struct device *dev = led_cdev->dev->parent;
314         struct hid_device *hdev = container_of(dev, struct hid_device, dev);
315         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
316         struct hid_report *report;
317         int led_nr = 0;
318 
319         if (led_cdev == &data_pointer->led_micmute)
320                 led_nr = 1;
321 
322         if (value == LED_OFF)
323                 data_pointer->led_state &= ~(1 << led_nr);
324         else
325                 data_pointer->led_state |= 1 << led_nr;
326 
327         report = hdev->report_enum[HID_OUTPUT_REPORT].report_id_hash[3];
328         report->field[0]->value[0] = (data_pointer->led_state >> 0) & 1;
329         report->field[0]->value[1] = (data_pointer->led_state >> 1) & 1;
330         hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
331 }
332 
333 static int tpkbd_probe_tp(struct hid_device *hdev)
334 {
335         struct device *dev = &hdev->dev;
336         struct tpkbd_data_pointer *data_pointer;
337         size_t name_sz = strlen(dev_name(dev)) + 16;
338         char *name_mute, *name_micmute;
339         int i;
340 
341         /* Validate required reports. */
342         for (i = 0; i < 4; i++) {
343                 if (!hid_validate_values(hdev, HID_FEATURE_REPORT, 4, i, 1))
344                         return -ENODEV;
345         }
346         if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 3, 0, 2))
347                 return -ENODEV;
348 
349         if (sysfs_create_group(&hdev->dev.kobj,
350                                 &tpkbd_attr_group_pointer)) {
351                 hid_warn(hdev, "Could not create sysfs group\n");
352         }
353 
354         data_pointer = devm_kzalloc(&hdev->dev,
355                                     sizeof(struct tpkbd_data_pointer),
356                                     GFP_KERNEL);
357         if (data_pointer == NULL) {
358                 hid_err(hdev, "Could not allocate memory for driver data\n");
359                 return -ENOMEM;
360         }
361 
362         // set same default values as windows driver
363         data_pointer->sensitivity = 0xa0;
364         data_pointer->press_speed = 0x38;
365 
366         name_mute = devm_kzalloc(&hdev->dev, name_sz, GFP_KERNEL);
367         name_micmute = devm_kzalloc(&hdev->dev, name_sz, GFP_KERNEL);
368         if (name_mute == NULL || name_micmute == NULL) {
369                 hid_err(hdev, "Could not allocate memory for led data\n");
370                 return -ENOMEM;
371         }
372         snprintf(name_mute, name_sz, "%s:amber:mute", dev_name(dev));
373         snprintf(name_micmute, name_sz, "%s:amber:micmute", dev_name(dev));
374 
375         hid_set_drvdata(hdev, data_pointer);
376 
377         data_pointer->led_mute.name = name_mute;
378         data_pointer->led_mute.brightness_get = tpkbd_led_brightness_get;
379         data_pointer->led_mute.brightness_set = tpkbd_led_brightness_set;
380         data_pointer->led_mute.dev = dev;
381         led_classdev_register(dev, &data_pointer->led_mute);
382 
383         data_pointer->led_micmute.name = name_micmute;
384         data_pointer->led_micmute.brightness_get = tpkbd_led_brightness_get;
385         data_pointer->led_micmute.brightness_set = tpkbd_led_brightness_set;
386         data_pointer->led_micmute.dev = dev;
387         led_classdev_register(dev, &data_pointer->led_micmute);
388 
389         tpkbd_features_set(hdev);
390 
391         return 0;
392 }
393 
394 static int tpkbd_probe(struct hid_device *hdev,
395                 const struct hid_device_id *id)
396 {
397         int ret;
398 
399         ret = hid_parse(hdev);
400         if (ret) {
401                 hid_err(hdev, "hid_parse failed\n");
402                 goto err;
403         }
404 
405         ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
406         if (ret) {
407                 hid_err(hdev, "hid_hw_start failed\n");
408                 goto err;
409         }
410 
411         if (hid_get_drvdata(hdev)) {
412                 hid_set_drvdata(hdev, NULL);
413                 ret = tpkbd_probe_tp(hdev);
414                 if (ret)
415                         goto err_hid;
416         }
417 
418         return 0;
419 err_hid:
420         hid_hw_stop(hdev);
421 err:
422         return ret;
423 }
424 
425 static void tpkbd_remove_tp(struct hid_device *hdev)
426 {
427         struct tpkbd_data_pointer *data_pointer = hid_get_drvdata(hdev);
428 
429         sysfs_remove_group(&hdev->dev.kobj,
430                         &tpkbd_attr_group_pointer);
431 
432         led_classdev_unregister(&data_pointer->led_micmute);
433         led_classdev_unregister(&data_pointer->led_mute);
434 
435         hid_set_drvdata(hdev, NULL);
436 }
437 
438 static void tpkbd_remove(struct hid_device *hdev)
439 {
440         if (hid_get_drvdata(hdev))
441                 tpkbd_remove_tp(hdev);
442 
443         hid_hw_stop(hdev);
444 }
445 
446 static const struct hid_device_id tpkbd_devices[] = {
447         { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_TPKBD) },
448         { }
449 };
450 
451 MODULE_DEVICE_TABLE(hid, tpkbd_devices);
452 
453 static struct hid_driver tpkbd_driver = {
454         .name = "lenovo_tpkbd",
455         .id_table = tpkbd_devices,
456         .input_mapping = tpkbd_input_mapping,
457         .probe = tpkbd_probe,
458         .remove = tpkbd_remove,
459 };
460 module_hid_driver(tpkbd_driver);
461 
462 MODULE_LICENSE("GPL");
463 

This page was automatically generated by LXR 0.3.1 (source).  •  Linux is a registered trademark of Linus Torvalds  •  Contact us