mm/memcontrol.c: suppress uninitialized-var warning with older gcc's
[linux-2.6/next.git] / drivers / hid / hid-roccat-arvo.c
blob2307471d96dc994914e19ea16e860f7e3dcaa75e
1 /*
2 * Roccat Arvo driver for Linux
4 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
5 */
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.
15 * Roccat Arvo is a gamer keyboard with 5 macro keys that can be configured in
16 * 5 profiles.
19 #include <linux/device.h>
20 #include <linux/input.h>
21 #include <linux/hid.h>
22 #include <linux/module.h>
23 #include <linux/slab.h>
24 #include <linux/hid-roccat.h>
25 #include "hid-ids.h"
26 #include "hid-roccat-common.h"
27 #include "hid-roccat-arvo.h"
29 static struct class *arvo_class;
31 static ssize_t arvo_sysfs_show_mode_key(struct device *dev,
32 struct device_attribute *attr, char *buf)
34 struct arvo_device *arvo =
35 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
36 struct usb_device *usb_dev =
37 interface_to_usbdev(to_usb_interface(dev->parent->parent));
38 struct arvo_mode_key temp_buf;
39 int retval;
41 mutex_lock(&arvo->arvo_lock);
42 retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_MODE_KEY,
43 &temp_buf, sizeof(struct arvo_mode_key));
44 mutex_unlock(&arvo->arvo_lock);
45 if (retval)
46 return retval;
48 return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.state);
51 static ssize_t arvo_sysfs_set_mode_key(struct device *dev,
52 struct device_attribute *attr, char const *buf, size_t size)
54 struct arvo_device *arvo =
55 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
56 struct usb_device *usb_dev =
57 interface_to_usbdev(to_usb_interface(dev->parent->parent));
58 struct arvo_mode_key temp_buf;
59 unsigned long state;
60 int retval;
62 retval = strict_strtoul(buf, 10, &state);
63 if (retval)
64 return retval;
66 temp_buf.command = ARVO_COMMAND_MODE_KEY;
67 temp_buf.state = state;
69 mutex_lock(&arvo->arvo_lock);
70 retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_MODE_KEY,
71 &temp_buf, sizeof(struct arvo_mode_key));
72 mutex_unlock(&arvo->arvo_lock);
73 if (retval)
74 return retval;
76 return size;
79 static ssize_t arvo_sysfs_show_key_mask(struct device *dev,
80 struct device_attribute *attr, char *buf)
82 struct arvo_device *arvo =
83 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
84 struct usb_device *usb_dev =
85 interface_to_usbdev(to_usb_interface(dev->parent->parent));
86 struct arvo_key_mask temp_buf;
87 int retval;
89 mutex_lock(&arvo->arvo_lock);
90 retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_KEY_MASK,
91 &temp_buf, sizeof(struct arvo_key_mask));
92 mutex_unlock(&arvo->arvo_lock);
93 if (retval)
94 return retval;
96 return snprintf(buf, PAGE_SIZE, "%d\n", temp_buf.key_mask);
99 static ssize_t arvo_sysfs_set_key_mask(struct device *dev,
100 struct device_attribute *attr, char const *buf, size_t size)
102 struct arvo_device *arvo =
103 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
104 struct usb_device *usb_dev =
105 interface_to_usbdev(to_usb_interface(dev->parent->parent));
106 struct arvo_key_mask temp_buf;
107 unsigned long key_mask;
108 int retval;
110 retval = strict_strtoul(buf, 10, &key_mask);
111 if (retval)
112 return retval;
114 temp_buf.command = ARVO_COMMAND_KEY_MASK;
115 temp_buf.key_mask = key_mask;
117 mutex_lock(&arvo->arvo_lock);
118 retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_KEY_MASK,
119 &temp_buf, sizeof(struct arvo_key_mask));
120 mutex_unlock(&arvo->arvo_lock);
121 if (retval)
122 return retval;
124 return size;
127 /* retval is 1-5 on success, < 0 on error */
128 static int arvo_get_actual_profile(struct usb_device *usb_dev)
130 struct arvo_actual_profile temp_buf;
131 int retval;
133 retval = roccat_common_receive(usb_dev, ARVO_USB_COMMAND_ACTUAL_PROFILE,
134 &temp_buf, sizeof(struct arvo_actual_profile));
136 if (retval)
137 return retval;
139 return temp_buf.actual_profile;
142 static ssize_t arvo_sysfs_show_actual_profile(struct device *dev,
143 struct device_attribute *attr, char *buf)
145 struct arvo_device *arvo =
146 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
148 return snprintf(buf, PAGE_SIZE, "%d\n", arvo->actual_profile);
151 static ssize_t arvo_sysfs_set_actual_profile(struct device *dev,
152 struct device_attribute *attr, char const *buf, size_t size)
154 struct arvo_device *arvo =
155 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
156 struct usb_device *usb_dev =
157 interface_to_usbdev(to_usb_interface(dev->parent->parent));
158 struct arvo_actual_profile temp_buf;
159 unsigned long profile;
160 int retval;
162 retval = strict_strtoul(buf, 10, &profile);
163 if (retval)
164 return retval;
166 temp_buf.command = ARVO_COMMAND_ACTUAL_PROFILE;
167 temp_buf.actual_profile = profile;
169 mutex_lock(&arvo->arvo_lock);
170 retval = roccat_common_send(usb_dev, ARVO_USB_COMMAND_ACTUAL_PROFILE,
171 &temp_buf, sizeof(struct arvo_actual_profile));
172 if (!retval) {
173 arvo->actual_profile = profile;
174 retval = size;
176 mutex_unlock(&arvo->arvo_lock);
177 return retval;
180 static ssize_t arvo_sysfs_write(struct file *fp,
181 struct kobject *kobj, void const *buf,
182 loff_t off, size_t count, size_t real_size, uint command)
184 struct device *dev =
185 container_of(kobj, struct device, kobj)->parent->parent;
186 struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
187 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
188 int retval;
190 if (off != 0 || count != real_size)
191 return -EINVAL;
193 mutex_lock(&arvo->arvo_lock);
194 retval = roccat_common_send(usb_dev, command, buf, real_size);
195 mutex_unlock(&arvo->arvo_lock);
197 return (retval ? retval : real_size);
200 static ssize_t arvo_sysfs_read(struct file *fp,
201 struct kobject *kobj, void *buf, loff_t off,
202 size_t count, size_t real_size, uint command)
204 struct device *dev =
205 container_of(kobj, struct device, kobj)->parent->parent;
206 struct arvo_device *arvo = hid_get_drvdata(dev_get_drvdata(dev));
207 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
208 int retval;
210 if (off >= real_size)
211 return 0;
213 if (off != 0 || count != real_size)
214 return -EINVAL;
216 mutex_lock(&arvo->arvo_lock);
217 retval = roccat_common_receive(usb_dev, command, buf, real_size);
218 mutex_unlock(&arvo->arvo_lock);
220 return (retval ? retval : real_size);
223 static ssize_t arvo_sysfs_write_button(struct file *fp,
224 struct kobject *kobj, struct bin_attribute *attr, char *buf,
225 loff_t off, size_t count)
227 return arvo_sysfs_write(fp, kobj, buf, off, count,
228 sizeof(struct arvo_button), ARVO_USB_COMMAND_BUTTON);
231 static ssize_t arvo_sysfs_read_info(struct file *fp,
232 struct kobject *kobj, struct bin_attribute *attr, char *buf,
233 loff_t off, size_t count)
235 return arvo_sysfs_read(fp, kobj, buf, off, count,
236 sizeof(struct arvo_info), ARVO_USB_COMMAND_INFO);
240 static struct device_attribute arvo_attributes[] = {
241 __ATTR(mode_key, 0660,
242 arvo_sysfs_show_mode_key, arvo_sysfs_set_mode_key),
243 __ATTR(key_mask, 0660,
244 arvo_sysfs_show_key_mask, arvo_sysfs_set_key_mask),
245 __ATTR(actual_profile, 0660,
246 arvo_sysfs_show_actual_profile,
247 arvo_sysfs_set_actual_profile),
248 __ATTR_NULL
251 static struct bin_attribute arvo_bin_attributes[] = {
253 .attr = { .name = "button", .mode = 0220 },
254 .size = sizeof(struct arvo_button),
255 .write = arvo_sysfs_write_button
258 .attr = { .name = "info", .mode = 0440 },
259 .size = sizeof(struct arvo_info),
260 .read = arvo_sysfs_read_info
262 __ATTR_NULL
265 static int arvo_init_arvo_device_struct(struct usb_device *usb_dev,
266 struct arvo_device *arvo)
268 int retval;
270 mutex_init(&arvo->arvo_lock);
272 retval = arvo_get_actual_profile(usb_dev);
273 if (retval < 0)
274 return retval;
275 arvo->actual_profile = retval;
277 return 0;
280 static int arvo_init_specials(struct hid_device *hdev)
282 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
283 struct usb_device *usb_dev = interface_to_usbdev(intf);
284 struct arvo_device *arvo;
285 int retval;
287 if (intf->cur_altsetting->desc.bInterfaceProtocol
288 == USB_INTERFACE_PROTOCOL_KEYBOARD) {
289 hid_set_drvdata(hdev, NULL);
290 return 0;
293 arvo = kzalloc(sizeof(*arvo), GFP_KERNEL);
294 if (!arvo) {
295 hid_err(hdev, "can't alloc device descriptor\n");
296 return -ENOMEM;
298 hid_set_drvdata(hdev, arvo);
300 retval = arvo_init_arvo_device_struct(usb_dev, arvo);
301 if (retval) {
302 hid_err(hdev, "couldn't init struct arvo_device\n");
303 goto exit_free;
306 retval = roccat_connect(arvo_class, hdev,
307 sizeof(struct arvo_roccat_report));
308 if (retval < 0) {
309 hid_err(hdev, "couldn't init char dev\n");
310 } else {
311 arvo->chrdev_minor = retval;
312 arvo->roccat_claimed = 1;
315 return 0;
316 exit_free:
317 kfree(arvo);
318 return retval;
321 static void arvo_remove_specials(struct hid_device *hdev)
323 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
324 struct arvo_device *arvo;
326 if (intf->cur_altsetting->desc.bInterfaceProtocol
327 == USB_INTERFACE_PROTOCOL_KEYBOARD)
328 return;
330 arvo = hid_get_drvdata(hdev);
331 if (arvo->roccat_claimed)
332 roccat_disconnect(arvo->chrdev_minor);
333 kfree(arvo);
336 static int arvo_probe(struct hid_device *hdev,
337 const struct hid_device_id *id)
339 int retval;
341 retval = hid_parse(hdev);
342 if (retval) {
343 hid_err(hdev, "parse failed\n");
344 goto exit;
347 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
348 if (retval) {
349 hid_err(hdev, "hw start failed\n");
350 goto exit;
353 retval = arvo_init_specials(hdev);
354 if (retval) {
355 hid_err(hdev, "couldn't install keyboard\n");
356 goto exit_stop;
359 return 0;
361 exit_stop:
362 hid_hw_stop(hdev);
363 exit:
364 return retval;
367 static void arvo_remove(struct hid_device *hdev)
369 arvo_remove_specials(hdev);
370 hid_hw_stop(hdev);
373 static void arvo_report_to_chrdev(struct arvo_device const *arvo,
374 u8 const *data)
376 struct arvo_special_report const *special_report;
377 struct arvo_roccat_report roccat_report;
379 special_report = (struct arvo_special_report const *)data;
381 roccat_report.profile = arvo->actual_profile;
382 roccat_report.button = special_report->event &
383 ARVO_SPECIAL_REPORT_EVENT_MASK_BUTTON;
384 if ((special_report->event & ARVO_SPECIAL_REPORT_EVENT_MASK_ACTION) ==
385 ARVO_SPECIAL_REPORT_EVENT_ACTION_PRESS)
386 roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_PRESS;
387 else
388 roccat_report.action = ARVO_ROCCAT_REPORT_ACTION_RELEASE;
390 roccat_report_event(arvo->chrdev_minor,
391 (uint8_t const *)&roccat_report);
394 static int arvo_raw_event(struct hid_device *hdev,
395 struct hid_report *report, u8 *data, int size)
397 struct arvo_device *arvo = hid_get_drvdata(hdev);
399 if (size != 3)
400 return 0;
402 if (arvo->roccat_claimed)
403 arvo_report_to_chrdev(arvo, data);
405 return 0;
408 static const struct hid_device_id arvo_devices[] = {
409 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ARVO) },
413 MODULE_DEVICE_TABLE(hid, arvo_devices);
415 static struct hid_driver arvo_driver = {
416 .name = "arvo",
417 .id_table = arvo_devices,
418 .probe = arvo_probe,
419 .remove = arvo_remove,
420 .raw_event = arvo_raw_event
423 static int __init arvo_init(void)
425 int retval;
427 arvo_class = class_create(THIS_MODULE, "arvo");
428 if (IS_ERR(arvo_class))
429 return PTR_ERR(arvo_class);
430 arvo_class->dev_attrs = arvo_attributes;
431 arvo_class->dev_bin_attrs = arvo_bin_attributes;
433 retval = hid_register_driver(&arvo_driver);
434 if (retval)
435 class_destroy(arvo_class);
436 return retval;
439 static void __exit arvo_exit(void)
441 hid_unregister_driver(&arvo_driver);
442 class_destroy(arvo_class);
445 module_init(arvo_init);
446 module_exit(arvo_exit);
448 MODULE_AUTHOR("Stefan Achatz");
449 MODULE_DESCRIPTION("USB Roccat Arvo driver");
450 MODULE_LICENSE("GPL v2");