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tcp: gso: fix truesize tracking
[linux-2.6.git] / drivers / hid / hid-steelseries.c
blob29f328f411fb5454e03d46406c880fc9a5de0516
1 /*
2 * HID driver for Steelseries SRW-S1
3 *
4 * Copyright (c) 2013 Simon Wood
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/device.h>
15 #include <linux/usb.h>
16 #include <linux/hid.h>
17 #include <linux/module.h>
18
19 #include "hid-ids.h"
20
21 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
22 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
23 #define SRWS1_NUMBER_LEDS 15
24 struct steelseries_srws1_data {
25 __u16 led_state;
26 /* the last element is used for setting all leds simultaneously */
27 struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
28 };
29 #endif
30
31 /* Fixed report descriptor for Steelseries SRW-S1 wheel controller
32 *
33 * The original descriptor hides the sensitivity and assists dials
34 * a custom vendor usage page. This inserts a patch to make them
35 * appear in the 'Generic Desktop' usage.
36 */
37
38 static __u8 steelseries_srws1_rdesc_fixed[] = {
39 0x05, 0x01, /* Usage Page (Desktop) */
40 0x09, 0x08, /* Usage (MultiAxis), Changed */
41 0xA1, 0x01, /* Collection (Application), */
42 0xA1, 0x02, /* Collection (Logical), */
43 0x95, 0x01, /* Report Count (1), */
44 0x05, 0x01, /* Changed Usage Page (Desktop), */
45 0x09, 0x30, /* Changed Usage (X), */
46 0x16, 0xF8, 0xF8, /* Logical Minimum (-1800), */
47 0x26, 0x08, 0x07, /* Logical Maximum (1800), */
48 0x65, 0x14, /* Unit (Degrees), */
49 0x55, 0x0F, /* Unit Exponent (15), */
50 0x75, 0x10, /* Report Size (16), */
51 0x81, 0x02, /* Input (Variable), */
52 0x09, 0x31, /* Changed Usage (Y), */
53 0x15, 0x00, /* Logical Minimum (0), */
54 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
55 0x75, 0x0C, /* Report Size (12), */
56 0x81, 0x02, /* Input (Variable), */
57 0x09, 0x32, /* Changed Usage (Z), */
58 0x15, 0x00, /* Logical Minimum (0), */
59 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
60 0x75, 0x0C, /* Report Size (12), */
61 0x81, 0x02, /* Input (Variable), */
62 0x05, 0x01, /* Usage Page (Desktop), */
63 0x09, 0x39, /* Usage (Hat Switch), */
64 0x25, 0x07, /* Logical Maximum (7), */
65 0x35, 0x00, /* Physical Minimum (0), */
66 0x46, 0x3B, 0x01, /* Physical Maximum (315), */
67 0x65, 0x14, /* Unit (Degrees), */
68 0x75, 0x04, /* Report Size (4), */
69 0x95, 0x01, /* Report Count (1), */
70 0x81, 0x02, /* Input (Variable), */
71 0x25, 0x01, /* Logical Maximum (1), */
72 0x45, 0x01, /* Physical Maximum (1), */
73 0x65, 0x00, /* Unit, */
74 0x75, 0x01, /* Report Size (1), */
75 0x95, 0x03, /* Report Count (3), */
76 0x81, 0x01, /* Input (Constant), */
77 0x05, 0x09, /* Usage Page (Button), */
78 0x19, 0x01, /* Usage Minimum (01h), */
79 0x29, 0x11, /* Usage Maximum (11h), */
80 0x95, 0x11, /* Report Count (17), */
81 0x81, 0x02, /* Input (Variable), */
82 /* ---- Dial patch starts here ---- */
83 0x05, 0x01, /* Usage Page (Desktop), */
84 0x09, 0x33, /* Usage (RX), */
85 0x75, 0x04, /* Report Size (4), */
86 0x95, 0x02, /* Report Count (2), */
87 0x15, 0x00, /* Logical Minimum (0), */
88 0x25, 0x0b, /* Logical Maximum (b), */
89 0x81, 0x02, /* Input (Variable), */
90 0x09, 0x35, /* Usage (RZ), */
91 0x75, 0x04, /* Report Size (4), */
92 0x95, 0x01, /* Report Count (1), */
93 0x25, 0x03, /* Logical Maximum (3), */
94 0x81, 0x02, /* Input (Variable), */
95 /* ---- Dial patch ends here ---- */
96 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
97 0x09, 0x01, /* Usage (01h), */
98 0x75, 0x04, /* Changed Report Size (4), */
99 0x95, 0x0D, /* Changed Report Count (13), */
100 0x81, 0x02, /* Input (Variable), */
101 0xC0, /* End Collection, */
102 0xA1, 0x02, /* Collection (Logical), */
103 0x09, 0x02, /* Usage (02h), */
104 0x75, 0x08, /* Report Size (8), */
105 0x95, 0x10, /* Report Count (16), */
106 0x91, 0x02, /* Output (Variable), */
107 0xC0, /* End Collection, */
108 0xC0 /* End Collection */
109 };
110
111 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
112 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
113 static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
114 {
115 struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
116 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
117 __s32 *value = report->field[0]->value;
118
119 value[0] = 0x40;
120 value[1] = leds & 0xFF;
121 value[2] = leds >> 8;
122 value[3] = 0x00;
123 value[4] = 0x00;
124 value[5] = 0x00;
125 value[6] = 0x00;
126 value[7] = 0x00;
127 value[8] = 0x00;
128 value[9] = 0x00;
129 value[10] = 0x00;
130 value[11] = 0x00;
131 value[12] = 0x00;
132 value[13] = 0x00;
133 value[14] = 0x00;
134 value[15] = 0x00;
135
136 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
137
138 /* Note: LED change does not show on device until the device is read/polled */
139 }
140
141 static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
142 enum led_brightness value)
143 {
144 struct device *dev = led_cdev->dev->parent;
145 struct hid_device *hid = container_of(dev, struct hid_device, dev);
146 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
147
148 if (!drv_data) {
149 hid_err(hid, "Device data not found.");
150 return;
151 }
152
153 if (value == LED_OFF)
154 drv_data->led_state = 0;
155 else
156 drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
157
158 steelseries_srws1_set_leds(hid, drv_data->led_state);
159 }
160
161 static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
162 {
163 struct device *dev = led_cdev->dev->parent;
164 struct hid_device *hid = container_of(dev, struct hid_device, dev);
165 struct steelseries_srws1_data *drv_data;
166
167 drv_data = hid_get_drvdata(hid);
168
169 if (!drv_data) {
170 hid_err(hid, "Device data not found.");
171 return LED_OFF;
172 }
173
174 return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
175 }
176
177 static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
178 enum led_brightness value)
179 {
180 struct device *dev = led_cdev->dev->parent;
181 struct hid_device *hid = container_of(dev, struct hid_device, dev);
182 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
183 int i, state = 0;
184
185 if (!drv_data) {
186 hid_err(hid, "Device data not found.");
187 return;
188 }
189
190 for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
191 if (led_cdev != drv_data->led[i])
192 continue;
193
194 state = (drv_data->led_state >> i) & 1;
195 if (value == LED_OFF && state) {
196 drv_data->led_state &= ~(1 << i);
197 steelseries_srws1_set_leds(hid, drv_data->led_state);
198 } else if (value != LED_OFF && !state) {
199 drv_data->led_state |= 1 << i;
200 steelseries_srws1_set_leds(hid, drv_data->led_state);
201 }
202 break;
203 }
204 }
205
206 static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
207 {
208 struct device *dev = led_cdev->dev->parent;
209 struct hid_device *hid = container_of(dev, struct hid_device, dev);
210 struct steelseries_srws1_data *drv_data;
211 int i, value = 0;
212
213 drv_data = hid_get_drvdata(hid);
214
215 if (!drv_data) {
216 hid_err(hid, "Device data not found.");
217 return LED_OFF;
218 }
219
220 for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
221 if (led_cdev == drv_data->led[i]) {
222 value = (drv_data->led_state >> i) & 1;
223 break;
224 }
225
226 return value ? LED_FULL : LED_OFF;
227 }
228
229 static int steelseries_srws1_probe(struct hid_device *hdev,
230 const struct hid_device_id *id)
231 {
232 int ret, i;
233 struct led_classdev *led;
234 size_t name_sz;
235 char *name;
236
237 struct steelseries_srws1_data *drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
238
239 if (drv_data == NULL) {
240 hid_err(hdev, "can't alloc SRW-S1 memory\n");
241 return -ENOMEM;
242 }
243
244 hid_set_drvdata(hdev, drv_data);
245
246 ret = hid_parse(hdev);
247 if (ret) {
248 hid_err(hdev, "parse failed\n");
249 goto err_free;
250 }
251
252 if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
253 ret = -ENODEV;
254 goto err_free;
255 }
256
257 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
258 if (ret) {
259 hid_err(hdev, "hw start failed\n");
260 goto err_free;
261 }
262
263 /* register led subsystem */
264 drv_data->led_state = 0;
265 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
266 drv_data->led[i] = NULL;
267
268 steelseries_srws1_set_leds(hdev, 0);
269
270 name_sz = strlen(hdev->uniq) + 16;
271
272 /* 'ALL', for setting all LEDs simultaneously */
273 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
274 if (!led) {
275 hid_err(hdev, "can't allocate memory for LED ALL\n");
276 goto err_led;
277 }
278
279 name = (void *)(&led[1]);
280 snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
281 led->name = name;
282 led->brightness = 0;
283 led->max_brightness = 1;
284 led->brightness_get = steelseries_srws1_led_all_get_brightness;
285 led->brightness_set = steelseries_srws1_led_all_set_brightness;
286
287 drv_data->led[SRWS1_NUMBER_LEDS] = led;
288 ret = led_classdev_register(&hdev->dev, led);
289 if (ret)
290 goto err_led;
291
292 /* Each individual LED */
293 for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
294 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
295 if (!led) {
296 hid_err(hdev, "can't allocate memory for LED %d\n", i);
297 goto err_led;
298 }
299
300 name = (void *)(&led[1]);
301 snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
302 led->name = name;
303 led->brightness = 0;
304 led->max_brightness = 1;
305 led->brightness_get = steelseries_srws1_led_get_brightness;
306 led->brightness_set = steelseries_srws1_led_set_brightness;
307
308 drv_data->led[i] = led;
309 ret = led_classdev_register(&hdev->dev, led);
310
311 if (ret) {
312 hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
313 err_led:
314 /* Deregister all LEDs (if any) */
315 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
316 led = drv_data->led[i];
317 drv_data->led[i] = NULL;
318 if (!led)
319 continue;
320 led_classdev_unregister(led);
321 kfree(led);
322 }
323 goto out; /* but let the driver continue without LEDs */
324 }
325 }
326 out:
327 return 0;
328 err_free:
329 kfree(drv_data);
330 return ret;
331 }
332
333 static void steelseries_srws1_remove(struct hid_device *hdev)
334 {
335 int i;
336 struct led_classdev *led;
337
338 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
339
340 if (drv_data) {
341 /* Deregister LEDs (if any) */
342 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
343 led = drv_data->led[i];
344 drv_data->led[i] = NULL;
345 if (!led)
346 continue;
347 led_classdev_unregister(led);
348 kfree(led);
349 }
350
351 }
352
353 hid_hw_stop(hdev);
354 kfree(drv_data);
355 return;
356 }
357 #endif
358
359 static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,
360 unsigned int *rsize)
361 {
362 if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
363 && rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
364 hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
365 rdesc = steelseries_srws1_rdesc_fixed;
366 *rsize = sizeof(steelseries_srws1_rdesc_fixed);
367 }
368 return rdesc;
369 }
370
371 static const struct hid_device_id steelseries_srws1_devices[] = {
372 { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
373 { }
374 };
375 MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
376
377 static struct hid_driver steelseries_srws1_driver = {
378 .name = "steelseries_srws1",
379 .id_table = steelseries_srws1_devices,
380 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
381 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
382 .probe = steelseries_srws1_probe,
383 .remove = steelseries_srws1_remove,
384 #endif
385 .report_fixup = steelseries_srws1_report_fixup
386 };
387
388 module_hid_driver(steelseries_srws1_driver);
389 MODULE_LICENSE("GPL");
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