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18#include <linux/device.h>
19#include <linux/input.h>
20#include <linux/hid.h>
21#include <linux/module.h>
22#include <linux/slab.h>
23#include <linux/hid-roccat.h>
24#include "hid-ids.h"
25#include "hid-roccat-common.h"
26#include "hid-roccat-savu.h"
27
28static struct class *savu_class;
29
30static ssize_t savu_sysfs_read(struct file *fp, struct kobject *kobj,
31 char *buf, loff_t off, size_t count,
32 size_t real_size, uint command)
33{
34 struct device *dev =
35 container_of(kobj, struct device, kobj)->parent->parent;
36 struct savu_device *savu = hid_get_drvdata(dev_get_drvdata(dev));
37 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
38 int retval;
39
40 if (off >= real_size)
41 return 0;
42
43 if (off != 0 || count != real_size)
44 return -EINVAL;
45
46 mutex_lock(&savu->savu_lock);
47 retval = roccat_common2_receive(usb_dev, command, buf, real_size);
48 mutex_unlock(&savu->savu_lock);
49
50 return retval ? retval : real_size;
51}
52
53static ssize_t savu_sysfs_write(struct file *fp, struct kobject *kobj,
54 void const *buf, loff_t off, size_t count,
55 size_t real_size, uint command)
56{
57 struct device *dev =
58 container_of(kobj, struct device, kobj)->parent->parent;
59 struct savu_device *savu = hid_get_drvdata(dev_get_drvdata(dev));
60 struct usb_device *usb_dev = interface_to_usbdev(to_usb_interface(dev));
61 int retval;
62
63 if (off != 0 || count != real_size)
64 return -EINVAL;
65
66 mutex_lock(&savu->savu_lock);
67 retval = roccat_common2_send_with_status(usb_dev, command,
68 (void *)buf, real_size);
69 mutex_unlock(&savu->savu_lock);
70
71 return retval ? retval : real_size;
72}
73
74#define SAVU_SYSFS_W(thingy, THINGY) \
75static ssize_t savu_sysfs_write_ ## thingy(struct file *fp, \
76 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
77 loff_t off, size_t count) \
78{ \
79 return savu_sysfs_write(fp, kobj, buf, off, count, \
80 SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \
81}
82
83#define SAVU_SYSFS_R(thingy, THINGY) \
84static ssize_t savu_sysfs_read_ ## thingy(struct file *fp, \
85 struct kobject *kobj, struct bin_attribute *attr, char *buf, \
86 loff_t off, size_t count) \
87{ \
88 return savu_sysfs_read(fp, kobj, buf, off, count, \
89 SAVU_SIZE_ ## THINGY, SAVU_COMMAND_ ## THINGY); \
90}
91
92#define SAVU_SYSFS_RW(thingy, THINGY) \
93SAVU_SYSFS_W(thingy, THINGY) \
94SAVU_SYSFS_R(thingy, THINGY)
95
96#define SAVU_BIN_ATTRIBUTE_RW(thingy, THINGY) \
97{ \
98 .attr = { .name = #thingy, .mode = 0660 }, \
99 .size = SAVU_SIZE_ ## THINGY, \
100 .read = savu_sysfs_read_ ## thingy, \
101 .write = savu_sysfs_write_ ## thingy \
102}
103
104#define SAVU_BIN_ATTRIBUTE_R(thingy, THINGY) \
105{ \
106 .attr = { .name = #thingy, .mode = 0440 }, \
107 .size = SAVU_SIZE_ ## THINGY, \
108 .read = savu_sysfs_read_ ## thingy, \
109}
110
111#define SAVU_BIN_ATTRIBUTE_W(thingy, THINGY) \
112{ \
113 .attr = { .name = #thingy, .mode = 0220 }, \
114 .size = SAVU_SIZE_ ## THINGY, \
115 .write = savu_sysfs_write_ ## thingy \
116}
117
118SAVU_SYSFS_W(control, CONTROL)
119SAVU_SYSFS_RW(profile, PROFILE)
120SAVU_SYSFS_RW(general, GENERAL)
121SAVU_SYSFS_RW(buttons, BUTTONS)
122SAVU_SYSFS_RW(macro, MACRO)
123SAVU_SYSFS_RW(info, INFO)
124SAVU_SYSFS_RW(sensor, SENSOR)
125
126static struct bin_attribute savu_bin_attributes[] = {
127 SAVU_BIN_ATTRIBUTE_W(control, CONTROL),
128 SAVU_BIN_ATTRIBUTE_RW(profile, PROFILE),
129 SAVU_BIN_ATTRIBUTE_RW(general, GENERAL),
130 SAVU_BIN_ATTRIBUTE_RW(buttons, BUTTONS),
131 SAVU_BIN_ATTRIBUTE_RW(macro, MACRO),
132 SAVU_BIN_ATTRIBUTE_RW(info, INFO),
133 SAVU_BIN_ATTRIBUTE_RW(sensor, SENSOR),
134 __ATTR_NULL
135};
136
137static int savu_init_savu_device_struct(struct usb_device *usb_dev,
138 struct savu_device *savu)
139{
140 mutex_init(&savu->savu_lock);
141
142 return 0;
143}
144
145static int savu_init_specials(struct hid_device *hdev)
146{
147 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
148 struct usb_device *usb_dev = interface_to_usbdev(intf);
149 struct savu_device *savu;
150 int retval;
151
152 if (intf->cur_altsetting->desc.bInterfaceProtocol
153 != USB_INTERFACE_PROTOCOL_MOUSE) {
154 hid_set_drvdata(hdev, NULL);
155 return 0;
156 }
157
158 savu = kzalloc(sizeof(*savu), GFP_KERNEL);
159 if (!savu) {
160 hid_err(hdev, "can't alloc device descriptor\n");
161 return -ENOMEM;
162 }
163 hid_set_drvdata(hdev, savu);
164
165 retval = savu_init_savu_device_struct(usb_dev, savu);
166 if (retval) {
167 hid_err(hdev, "couldn't init struct savu_device\n");
168 goto exit_free;
169 }
170
171 retval = roccat_connect(savu_class, hdev,
172 sizeof(struct savu_roccat_report));
173 if (retval < 0) {
174 hid_err(hdev, "couldn't init char dev\n");
175 } else {
176 savu->chrdev_minor = retval;
177 savu->roccat_claimed = 1;
178 }
179
180 return 0;
181exit_free:
182 kfree(savu);
183 return retval;
184}
185
186static void savu_remove_specials(struct hid_device *hdev)
187{
188 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
189 struct savu_device *savu;
190
191 if (intf->cur_altsetting->desc.bInterfaceProtocol
192 != USB_INTERFACE_PROTOCOL_MOUSE)
193 return;
194
195 savu = hid_get_drvdata(hdev);
196 if (savu->roccat_claimed)
197 roccat_disconnect(savu->chrdev_minor);
198 kfree(savu);
199}
200
201static int savu_probe(struct hid_device *hdev,
202 const struct hid_device_id *id)
203{
204 int retval;
205
206 retval = hid_parse(hdev);
207 if (retval) {
208 hid_err(hdev, "parse failed\n");
209 goto exit;
210 }
211
212 retval = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
213 if (retval) {
214 hid_err(hdev, "hw start failed\n");
215 goto exit;
216 }
217
218 retval = savu_init_specials(hdev);
219 if (retval) {
220 hid_err(hdev, "couldn't install mouse\n");
221 goto exit_stop;
222 }
223
224 return 0;
225
226exit_stop:
227 hid_hw_stop(hdev);
228exit:
229 return retval;
230}
231
232static void savu_remove(struct hid_device *hdev)
233{
234 savu_remove_specials(hdev);
235 hid_hw_stop(hdev);
236}
237
238static void savu_report_to_chrdev(struct savu_device const *savu,
239 u8 const *data)
240{
241 struct savu_roccat_report roccat_report;
242 struct savu_mouse_report_special const *special_report;
243
244 if (data[0] != SAVU_MOUSE_REPORT_NUMBER_SPECIAL)
245 return;
246
247 special_report = (struct savu_mouse_report_special const *)data;
248
249 roccat_report.type = special_report->type;
250 roccat_report.data[0] = special_report->data[0];
251 roccat_report.data[1] = special_report->data[1];
252 roccat_report_event(savu->chrdev_minor,
253 (uint8_t const *)&roccat_report);
254}
255
256static int savu_raw_event(struct hid_device *hdev,
257 struct hid_report *report, u8 *data, int size)
258{
259 struct usb_interface *intf = to_usb_interface(hdev->dev.parent);
260 struct savu_device *savu = hid_get_drvdata(hdev);
261
262 if (intf->cur_altsetting->desc.bInterfaceProtocol
263 != USB_INTERFACE_PROTOCOL_MOUSE)
264 return 0;
265
266 if (savu == NULL)
267 return 0;
268
269 if (savu->roccat_claimed)
270 savu_report_to_chrdev(savu, data);
271
272 return 0;
273}
274
275static const struct hid_device_id savu_devices[] = {
276 { HID_USB_DEVICE(USB_VENDOR_ID_ROCCAT, USB_DEVICE_ID_ROCCAT_SAVU) },
277 { }
278};
279
280MODULE_DEVICE_TABLE(hid, savu_devices);
281
282static struct hid_driver savu_driver = {
283 .name = "savu",
284 .id_table = savu_devices,
285 .probe = savu_probe,
286 .remove = savu_remove,
287 .raw_event = savu_raw_event
288};
289
290static int __init savu_init(void)
291{
292 int retval;
293
294 savu_class = class_create(THIS_MODULE, "savu");
295 if (IS_ERR(savu_class))
296 return PTR_ERR(savu_class);
297 savu_class->dev_bin_attrs = savu_bin_attributes;
298
299 retval = hid_register_driver(&savu_driver);
300 if (retval)
301 class_destroy(savu_class);
302 return retval;
303}
304
305static void __exit savu_exit(void)
306{
307 hid_unregister_driver(&savu_driver);
308 class_destroy(savu_class);
309}
310
311module_init(savu_init);
312module_exit(savu_exit);
313
314MODULE_AUTHOR("Stefan Achatz");
315MODULE_DESCRIPTION("USB Roccat Savu driver");
316MODULE_LICENSE("GPL v2");
317
