HID: roccat: fix wrong hid_err usage on struct usb_device
[deliverable/linux.git] / drivers / hid / hid-roccat-isku.c
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1/*
2 * Roccat Isku driver for Linux
3 *
4 * Copyright (c) 2011 Stefan Achatz <erazor_de@users.sourceforge.net>
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/*
15 * Roccat Isku is a gamer keyboard with macro keys that can be configured in
16 * 5 profiles.
17 */
18
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-isku.h"
28
29static struct class *isku_class;
30
31static void isku_profile_activated(struct isku_device *isku, uint new_profile)
32{
33 isku->actual_profile = new_profile;
34}
35
36static int isku_receive(struct usb_device *usb_dev, uint command,
37 void *buf, uint size)
38{
39 return roccat_common_receive(usb_dev, command, buf, size);
40}
41
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42static int isku_get_actual_profile(struct usb_device *usb_dev)
43{
44 struct isku_actual_profile buf;
45 int retval;
46
47 retval = isku_receive(usb_dev, ISKU_COMMAND_ACTUAL_PROFILE,
48 &buf, sizeof(struct isku_actual_profile));
49 return retval ? retval : buf.actual_profile;
50}
51
52static int isku_set_actual_profile(struct usb_device *usb_dev, int new_profile)
53{
54 struct isku_actual_profile buf;
55
56 buf.command = ISKU_COMMAND_ACTUAL_PROFILE;
57 buf.size = sizeof(struct isku_actual_profile);
58 buf.actual_profile = new_profile;
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59 return roccat_common_send_with_status(usb_dev,
60 ISKU_COMMAND_ACTUAL_PROFILE, &buf,
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61 sizeof(struct isku_actual_profile));
62}
63
64static ssize_t isku_sysfs_show_actual_profile(struct device *dev,
65 struct device_attribute *attr, char *buf)
66{
67 struct isku_device *isku =
68 hid_get_drvdata(dev_get_drvdata(dev->parent->parent));
69 return snprintf(buf, PAGE_SIZE, "%d\n", isku->actual_profile);
70}
71
72static ssize_t isku_sysfs_set_actual_profile(struct device *dev,
73 struct device_attribute *attr, char const *buf, size_t size)
74{
75 struct isku_device *isku;
76 struct usb_device *usb_dev;
77 unsigned long profile;
78 int retval;
79 struct isku_roccat_report roccat_report;
80
81 dev = dev->parent->parent;
82 isku = hid_get_drvdata(dev_get_drvdata(dev));
83 usb_dev = interface_to_usbdev(to_usb_interface(dev));
84
85 retval = strict_strtoul(buf, 10, &profile);
86 if (retval)
87 return retval;
88
89 if (profile > 4)
90 return -EINVAL;
91
92 mutex_lock(&isku->isku_lock);
93
94 retval = isku_set_actual_profile(usb_dev, profile);
95 if (retval) {
96 mutex_unlock(&isku->isku_lock);
97 return retval;
98 }
99
100 isku_profile_activated(isku, profile);
101
102 roccat_report.event = ISKU_REPORT_BUTTON_EVENT_PROFILE;
103 roccat_report.data1 = profile + 1;
104 roccat_report.data2 = 0;
105 roccat_report.profile = profile + 1;
106 roccat_report_event(isku->chrdev_minor, (uint8_t const *)&roccat_report);
107
108 mutex_unlock(&isku->isku_lock);
109
110 return size;
111}
112
113static struct device_attribute isku_attributes[] = {
114 __ATTR(actual_profile, 0660,
115 isku_sysfs_show_actual_profile,
116 isku_sysfs_set_actual_profile),
117 __ATTR_NULL
118};
119
120static ssize_t isku_sysfs_read(struct file *fp, struct kobject *kobj,
121 char *buf, loff_t off, size_t count,
122 size_t real_size, uint command)
123{
124 struct device *dev =
125 container_of(kobj, struct device, kobj)->parent->parent;
126 struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
127 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
128 int retval;
129
130 if (off >= real_size)
131 return 0;
132
133 if (off != 0 || count != real_size)
134 return -EINVAL;
135
136 mutex_lock(&isku->isku_lock);
137 retval = isku_receive(usb_dev, command, buf, real_size);
138 mutex_unlock(&isku->isku_lock);
139
140 return retval ? retval : real_size;
141}
142
143static ssize_t isku_sysfs_write(struct file *fp, struct kobject *kobj,
144 void const *buf, loff_t off, size_t count,
145 size_t real_size, uint command)
146{
147 struct device *dev =
148 container_of(kobj, struct device, kobj)->parent->parent;
149 struct isku_device *isku = hid_get_drvdata(dev_get_drvdata(dev));
150 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
151 int retval;
152
153 if (off != 0 || count != real_size)
154 return -EINVAL;
155
156 mutex_lock(&isku->isku_lock);
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157 retval = roccat_common_send_with_status(usb_dev, command,
158 (void *)buf, real_size);
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159 mutex_unlock(&isku->isku_lock);
160
161 return retval ? retval : real_size;
162}
163
164#define ISKU_SYSFS_W(thingy, THINGY) \
165static ssize_t isku_sysfs_write_ ## thingy(struct file *fp, struct kobject *kobj, \
166 struct bin_attribute *attr, char *buf, \
167 loff_t off, size_t count) \
168{ \
169 return isku_sysfs_write(fp, kobj, buf, off, count, \
170 sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
171}
172
173#define ISKU_SYSFS_R(thingy, THINGY) \
174static ssize_t isku_sysfs_read_ ## thingy(struct file *fp, struct kobject *kobj, \
175 struct bin_attribute *attr, char *buf, \
176 loff_t off, size_t count) \
177{ \
178 return isku_sysfs_read(fp, kobj, buf, off, count, \
179 sizeof(struct isku_ ## thingy), ISKU_COMMAND_ ## THINGY); \
180}
181
182#define ISKU_SYSFS_RW(thingy, THINGY) \
183ISKU_SYSFS_R(thingy, THINGY) \
184ISKU_SYSFS_W(thingy, THINGY)
185
186#define ISKU_BIN_ATTR_RW(thingy) \
187{ \
188 .attr = { .name = #thingy, .mode = 0660 }, \
189 .size = sizeof(struct isku_ ## thingy), \
190 .read = isku_sysfs_read_ ## thingy, \
191 .write = isku_sysfs_write_ ## thingy \
192}
193
194#define ISKU_BIN_ATTR_R(thingy) \
195{ \
196 .attr = { .name = #thingy, .mode = 0440 }, \
197 .size = sizeof(struct isku_ ## thingy), \
198 .read = isku_sysfs_read_ ## thingy, \
199}
200
201#define ISKU_BIN_ATTR_W(thingy) \
202{ \
203 .attr = { .name = #thingy, .mode = 0220 }, \
204 .size = sizeof(struct isku_ ## thingy), \
205 .write = isku_sysfs_write_ ## thingy \
206}
207
208ISKU_SYSFS_RW(macro, MACRO)
209ISKU_SYSFS_RW(keys_function, KEYS_FUNCTION)
210ISKU_SYSFS_RW(keys_easyzone, KEYS_EASYZONE)
211ISKU_SYSFS_RW(keys_media, KEYS_MEDIA)
212ISKU_SYSFS_RW(keys_thumbster, KEYS_THUMBSTER)
213ISKU_SYSFS_RW(keys_macro, KEYS_MACRO)
214ISKU_SYSFS_RW(keys_capslock, KEYS_CAPSLOCK)
215ISKU_SYSFS_RW(light, LIGHT)
216ISKU_SYSFS_RW(key_mask, KEY_MASK)
217ISKU_SYSFS_RW(last_set, LAST_SET)
218ISKU_SYSFS_W(talk, TALK)
219ISKU_SYSFS_R(info, INFO)
220ISKU_SYSFS_W(control, CONTROL)
221
222static struct bin_attribute isku_bin_attributes[] = {
223 ISKU_BIN_ATTR_RW(macro),
224 ISKU_BIN_ATTR_RW(keys_function),
225 ISKU_BIN_ATTR_RW(keys_easyzone),
226 ISKU_BIN_ATTR_RW(keys_media),
227 ISKU_BIN_ATTR_RW(keys_thumbster),
228 ISKU_BIN_ATTR_RW(keys_macro),
229 ISKU_BIN_ATTR_RW(keys_capslock),
230 ISKU_BIN_ATTR_RW(light),
231 ISKU_BIN_ATTR_RW(key_mask),
232 ISKU_BIN_ATTR_RW(last_set),
233 ISKU_BIN_ATTR_W(talk),
234 ISKU_BIN_ATTR_R(info),
235 ISKU_BIN_ATTR_W(control),
236 __ATTR_NULL
237};
238
239static int isku_init_isku_device_struct(struct usb_device *usb_dev,
240 struct isku_device *isku)
241{
242 int retval;
243
244 mutex_init(&isku->isku_lock);
245
246 retval = isku_get_actual_profile(usb_dev);
247 if (retval < 0)
248 return retval;
249 isku_profile_activated(isku, retval);
250
251 return 0;
252}
253
254static int isku_init_specials(struct hid_device *hdev)
255{
256 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
257 struct usb_device *usb_dev = interface_to_usbdev(intf);
258 struct isku_device *isku;
259 int retval;
260
261 if (intf->cur_altsetting->desc.bInterfaceProtocol
262 != ISKU_USB_INTERFACE_PROTOCOL) {
263 hid_set_drvdata(hdev, NULL);
264 return 0;
265 }
266
267 isku = kzalloc(sizeof(*isku), GFP_KERNEL);
268 if (!isku) {
269 hid_err(hdev, "can't alloc device descriptor\n");
270 return -ENOMEM;
271 }
272 hid_set_drvdata(hdev, isku);
273
274 retval = isku_init_isku_device_struct(usb_dev, isku);
275 if (retval) {
276 hid_err(hdev, "couldn't init struct isku_device\n");
277 goto exit_free;
278 }
279
280 retval = roccat_connect(isku_class, hdev,
281 sizeof(struct isku_roccat_report));
282 if (retval < 0) {
283 hid_err(hdev, "couldn't init char dev\n");
284 } else {
285 isku->chrdev_minor = retval;
286 isku->roccat_claimed = 1;
287 }
288
289 return 0;
290exit_free:
291 kfree(isku);
292 return retval;
293}
294
295static void isku_remove_specials(struct hid_device *hdev)
296{
297 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
298 struct isku_device *isku;
299
300 if (intf->cur_altsetting->desc.bInterfaceProtocol
301 != ISKU_USB_INTERFACE_PROTOCOL)
302 return;
303
304 isku = hid_get_drvdata(hdev);
305 if (isku->roccat_claimed)
306 roccat_disconnect(isku->chrdev_minor);
307 kfree(isku);
308}
309
310static int isku_probe(struct hid_device *hdev,
311 const struct hid_device_id *id)
312{
313 int retval;
314
315 retval = hid_parse(hdev);
316 if (retval) {
317 hid_err(hdev, "parse failed\n");
318 goto exit;
319 }
320
321 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
322 if (retval) {
323 hid_err(hdev, "hw start failed\n");
324 goto exit;
325 }
326
327 retval = isku_init_specials(hdev);
328 if (retval) {
329 hid_err(hdev, "couldn't install keyboard\n");
330 goto exit_stop;
331 }
332
333 return 0;
334
335exit_stop:
336 hid_hw_stop(hdev);
337exit:
338 return retval;
339}
340
341static void isku_remove(struct hid_device *hdev)
342{
343 isku_remove_specials(hdev);
344 hid_hw_stop(hdev);
345}
346
347static void isku_keep_values_up_to_date(struct isku_device *isku,
348 u8 const *data)
349{
350 struct isku_report_button const *button_report;
351
352 switch (data[0]) {
353 case ISKU_REPORT_NUMBER_BUTTON:
354 button_report = (struct isku_report_button const *)data;
355 switch (button_report->event) {
356 case ISKU_REPORT_BUTTON_EVENT_PROFILE:
357 isku_profile_activated(isku, button_report->data1 - 1);
358 break;
359 }
360 break;
361 }
362}
363
364static void isku_report_to_chrdev(struct isku_device const *isku,
365 u8 const *data)
366{
367 struct isku_roccat_report roccat_report;
368 struct isku_report_button const *button_report;
369
370 if (data[0] != ISKU_REPORT_NUMBER_BUTTON)
371 return;
372
373 button_report = (struct isku_report_button const *)data;
374
375 roccat_report.event = button_report->event;
376 roccat_report.data1 = button_report->data1;
377 roccat_report.data2 = button_report->data2;
378 roccat_report.profile = isku->actual_profile + 1;
379 roccat_report_event(isku->chrdev_minor,
380 (uint8_t const *)&roccat_report);
381}
382
383static int isku_raw_event(struct hid_device *hdev,
384 struct hid_report *report, u8 *data, int size)
385{
386 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
387 struct isku_device *isku = hid_get_drvdata(hdev);
388
389 if (intf->cur_altsetting->desc.bInterfaceProtocol
390 != ISKU_USB_INTERFACE_PROTOCOL)
391 return 0;
392
393 if (isku == NULL)
394 return 0;
395
396 isku_keep_values_up_to_date(isku, data);
397
398 if (isku->roccat_claimed)
399 isku_report_to_chrdev(isku, data);
400
401 return 0;
402}
403
404static const struct hid_device_id isku_devices[] = {
405 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_ISKU) },
406 { }
407};
408
409MODULE_DEVICE_TABLE(hid, isku_devices);
410
411static struct hid_driver isku_driver = {
412 .name = "isku",
413 .id_table = isku_devices,
414 .probe = isku_probe,
415 .remove = isku_remove,
416 .raw_event = isku_raw_event
417};
418
419static int __init isku_init(void)
420{
421 int retval;
422 isku_class = class_create(THIS_MODULE, "isku");
423 if (IS_ERR(isku_class))
424 return PTR_ERR(isku_class);
425 isku_class->dev_attrs = isku_attributes;
426 isku_class->dev_bin_attrs = isku_bin_attributes;
427
428 retval = hid_register_driver(&isku_driver);
429 if (retval)
430 class_destroy(isku_class);
431 return retval;
432}
433
434static void __exit isku_exit(void)
435{
436 hid_unregister_driver(&isku_driver);
437 class_destroy(isku_class);
438}
439
440module_init(isku_init);
441module_exit(isku_exit);
442
443MODULE_AUTHOR("Stefan Achatz");
444MODULE_DESCRIPTION("USB Roccat Isku driver");
445MODULE_LICENSE("GPL v2");
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