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drm/amdgpu: check memory allocation failure
[linux/fpc-iii.git] / drivers / hid / hid-steelseries.c
blobec18768b124aeb93cf38cb90bd66fe09452a0a09
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/hid.h>
16 #include <linux/module.h>
17
18 #include "hid-ids.h"
19
20 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
21 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
22 #define SRWS1_NUMBER_LEDS 15
23 struct steelseries_srws1_data {
24 __u16 led_state;
25 /* the last element is used for setting all leds simultaneously */
26 struct led_classdev *led[SRWS1_NUMBER_LEDS + 1];
27 };
28 #endif
29
30 /* Fixed report descriptor for Steelseries SRW-S1 wheel controller
31 *
32 * The original descriptor hides the sensitivity and assists dials
33 * a custom vendor usage page. This inserts a patch to make them
34 * appear in the 'Generic Desktop' usage.
35 */
36
37 static __u8 steelseries_srws1_rdesc_fixed[] = {
38 0x05, 0x01, /* Usage Page (Desktop) */
39 0x09, 0x08, /* Usage (MultiAxis), Changed */
40 0xA1, 0x01, /* Collection (Application), */
41 0xA1, 0x02, /* Collection (Logical), */
42 0x95, 0x01, /* Report Count (1), */
43 0x05, 0x01, /* Changed Usage Page (Desktop), */
44 0x09, 0x30, /* Changed Usage (X), */
45 0x16, 0xF8, 0xF8, /* Logical Minimum (-1800), */
46 0x26, 0x08, 0x07, /* Logical Maximum (1800), */
47 0x65, 0x14, /* Unit (Degrees), */
48 0x55, 0x0F, /* Unit Exponent (15), */
49 0x75, 0x10, /* Report Size (16), */
50 0x81, 0x02, /* Input (Variable), */
51 0x09, 0x31, /* Changed Usage (Y), */
52 0x15, 0x00, /* Logical Minimum (0), */
53 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
54 0x75, 0x0C, /* Report Size (12), */
55 0x81, 0x02, /* Input (Variable), */
56 0x09, 0x32, /* Changed Usage (Z), */
57 0x15, 0x00, /* Logical Minimum (0), */
58 0x26, 0xFF, 0x03, /* Logical Maximum (1023), */
59 0x75, 0x0C, /* Report Size (12), */
60 0x81, 0x02, /* Input (Variable), */
61 0x05, 0x01, /* Usage Page (Desktop), */
62 0x09, 0x39, /* Usage (Hat Switch), */
63 0x25, 0x07, /* Logical Maximum (7), */
64 0x35, 0x00, /* Physical Minimum (0), */
65 0x46, 0x3B, 0x01, /* Physical Maximum (315), */
66 0x65, 0x14, /* Unit (Degrees), */
67 0x75, 0x04, /* Report Size (4), */
68 0x95, 0x01, /* Report Count (1), */
69 0x81, 0x02, /* Input (Variable), */
70 0x25, 0x01, /* Logical Maximum (1), */
71 0x45, 0x01, /* Physical Maximum (1), */
72 0x65, 0x00, /* Unit, */
73 0x75, 0x01, /* Report Size (1), */
74 0x95, 0x03, /* Report Count (3), */
75 0x81, 0x01, /* Input (Constant), */
76 0x05, 0x09, /* Usage Page (Button), */
77 0x19, 0x01, /* Usage Minimum (01h), */
78 0x29, 0x11, /* Usage Maximum (11h), */
79 0x95, 0x11, /* Report Count (17), */
80 0x81, 0x02, /* Input (Variable), */
81 /* ---- Dial patch starts here ---- */
82 0x05, 0x01, /* Usage Page (Desktop), */
83 0x09, 0x33, /* Usage (RX), */
84 0x75, 0x04, /* Report Size (4), */
85 0x95, 0x02, /* Report Count (2), */
86 0x15, 0x00, /* Logical Minimum (0), */
87 0x25, 0x0b, /* Logical Maximum (b), */
88 0x81, 0x02, /* Input (Variable), */
89 0x09, 0x35, /* Usage (RZ), */
90 0x75, 0x04, /* Report Size (4), */
91 0x95, 0x01, /* Report Count (1), */
92 0x25, 0x03, /* Logical Maximum (3), */
93 0x81, 0x02, /* Input (Variable), */
94 /* ---- Dial patch ends here ---- */
95 0x06, 0x00, 0xFF, /* Usage Page (FF00h), */
96 0x09, 0x01, /* Usage (01h), */
97 0x75, 0x04, /* Changed Report Size (4), */
98 0x95, 0x0D, /* Changed Report Count (13), */
99 0x81, 0x02, /* Input (Variable), */
100 0xC0, /* End Collection, */
101 0xA1, 0x02, /* Collection (Logical), */
102 0x09, 0x02, /* Usage (02h), */
103 0x75, 0x08, /* Report Size (8), */
104 0x95, 0x10, /* Report Count (16), */
105 0x91, 0x02, /* Output (Variable), */
106 0xC0, /* End Collection, */
107 0xC0 /* End Collection */
108 };
109
110 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
111 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
112 static void steelseries_srws1_set_leds(struct hid_device *hdev, __u16 leds)
113 {
114 struct list_head *report_list = &hdev->report_enum[HID_OUTPUT_REPORT].report_list;
115 struct hid_report *report = list_entry(report_list->next, struct hid_report, list);
116 __s32 *value = report->field[0]->value;
117
118 value[0] = 0x40;
119 value[1] = leds & 0xFF;
120 value[2] = leds >> 8;
121 value[3] = 0x00;
122 value[4] = 0x00;
123 value[5] = 0x00;
124 value[6] = 0x00;
125 value[7] = 0x00;
126 value[8] = 0x00;
127 value[9] = 0x00;
128 value[10] = 0x00;
129 value[11] = 0x00;
130 value[12] = 0x00;
131 value[13] = 0x00;
132 value[14] = 0x00;
133 value[15] = 0x00;
134
135 hid_hw_request(hdev, report, HID_REQ_SET_REPORT);
136
137 /* Note: LED change does not show on device until the device is read/polled */
138 }
139
140 static void steelseries_srws1_led_all_set_brightness(struct led_classdev *led_cdev,
141 enum led_brightness value)
142 {
143 struct device *dev = led_cdev->dev->parent;
144 struct hid_device *hid = to_hid_device(dev);
145 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
146
147 if (!drv_data) {
148 hid_err(hid, "Device data not found.");
149 return;
150 }
151
152 if (value == LED_OFF)
153 drv_data->led_state = 0;
154 else
155 drv_data->led_state = (1 << (SRWS1_NUMBER_LEDS + 1)) - 1;
156
157 steelseries_srws1_set_leds(hid, drv_data->led_state);
158 }
159
160 static enum led_brightness steelseries_srws1_led_all_get_brightness(struct led_classdev *led_cdev)
161 {
162 struct device *dev = led_cdev->dev->parent;
163 struct hid_device *hid = to_hid_device(dev);
164 struct steelseries_srws1_data *drv_data;
165
166 drv_data = hid_get_drvdata(hid);
167
168 if (!drv_data) {
169 hid_err(hid, "Device data not found.");
170 return LED_OFF;
171 }
172
173 return (drv_data->led_state >> SRWS1_NUMBER_LEDS) ? LED_FULL : LED_OFF;
174 }
175
176 static void steelseries_srws1_led_set_brightness(struct led_classdev *led_cdev,
177 enum led_brightness value)
178 {
179 struct device *dev = led_cdev->dev->parent;
180 struct hid_device *hid = to_hid_device(dev);
181 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hid);
182 int i, state = 0;
183
184 if (!drv_data) {
185 hid_err(hid, "Device data not found.");
186 return;
187 }
188
189 for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
190 if (led_cdev != drv_data->led[i])
191 continue;
192
193 state = (drv_data->led_state >> i) & 1;
194 if (value == LED_OFF && state) {
195 drv_data->led_state &= ~(1 << i);
196 steelseries_srws1_set_leds(hid, drv_data->led_state);
197 } else if (value != LED_OFF && !state) {
198 drv_data->led_state |= 1 << i;
199 steelseries_srws1_set_leds(hid, drv_data->led_state);
200 }
201 break;
202 }
203 }
204
205 static enum led_brightness steelseries_srws1_led_get_brightness(struct led_classdev *led_cdev)
206 {
207 struct device *dev = led_cdev->dev->parent;
208 struct hid_device *hid = to_hid_device(dev);
209 struct steelseries_srws1_data *drv_data;
210 int i, value = 0;
211
212 drv_data = hid_get_drvdata(hid);
213
214 if (!drv_data) {
215 hid_err(hid, "Device data not found.");
216 return LED_OFF;
217 }
218
219 for (i = 0; i < SRWS1_NUMBER_LEDS; i++)
220 if (led_cdev == drv_data->led[i]) {
221 value = (drv_data->led_state >> i) & 1;
222 break;
223 }
224
225 return value ? LED_FULL : LED_OFF;
226 }
227
228 static int steelseries_srws1_probe(struct hid_device *hdev,
229 const struct hid_device_id *id)
230 {
231 int ret, i;
232 struct led_classdev *led;
233 size_t name_sz;
234 char *name;
235
236 struct steelseries_srws1_data *drv_data = kzalloc(sizeof(*drv_data), GFP_KERNEL);
237
238 if (drv_data == NULL) {
239 hid_err(hdev, "can't alloc SRW-S1 memory\n");
240 return -ENOMEM;
241 }
242
243 hid_set_drvdata(hdev, drv_data);
244
245 ret = hid_parse(hdev);
246 if (ret) {
247 hid_err(hdev, "parse failed\n");
248 goto err_free;
249 }
250
251 if (!hid_validate_values(hdev, HID_OUTPUT_REPORT, 0, 0, 16)) {
252 ret = -ENODEV;
253 goto err_free;
254 }
255
256 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
257 if (ret) {
258 hid_err(hdev, "hw start failed\n");
259 goto err_free;
260 }
261
262 /* register led subsystem */
263 drv_data->led_state = 0;
264 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++)
265 drv_data->led[i] = NULL;
266
267 steelseries_srws1_set_leds(hdev, 0);
268
269 name_sz = strlen(hdev->uniq) + 16;
270
271 /* 'ALL', for setting all LEDs simultaneously */
272 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
273 if (!led) {
274 hid_err(hdev, "can't allocate memory for LED ALL\n");
275 goto err_led;
276 }
277
278 name = (void *)(&led[1]);
279 snprintf(name, name_sz, "SRWS1::%s::RPMALL", hdev->uniq);
280 led->name = name;
281 led->brightness = 0;
282 led->max_brightness = 1;
283 led->brightness_get = steelseries_srws1_led_all_get_brightness;
284 led->brightness_set = steelseries_srws1_led_all_set_brightness;
285
286 drv_data->led[SRWS1_NUMBER_LEDS] = led;
287 ret = led_classdev_register(&hdev->dev, led);
288 if (ret)
289 goto err_led;
290
291 /* Each individual LED */
292 for (i = 0; i < SRWS1_NUMBER_LEDS; i++) {
293 led = kzalloc(sizeof(struct led_classdev)+name_sz, GFP_KERNEL);
294 if (!led) {
295 hid_err(hdev, "can't allocate memory for LED %d\n", i);
296 goto err_led;
297 }
298
299 name = (void *)(&led[1]);
300 snprintf(name, name_sz, "SRWS1::%s::RPM%d", hdev->uniq, i+1);
301 led->name = name;
302 led->brightness = 0;
303 led->max_brightness = 1;
304 led->brightness_get = steelseries_srws1_led_get_brightness;
305 led->brightness_set = steelseries_srws1_led_set_brightness;
306
307 drv_data->led[i] = led;
308 ret = led_classdev_register(&hdev->dev, led);
309
310 if (ret) {
311 hid_err(hdev, "failed to register LED %d. Aborting.\n", i);
312 err_led:
313 /* Deregister all LEDs (if any) */
314 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
315 led = drv_data->led[i];
316 drv_data->led[i] = NULL;
317 if (!led)
318 continue;
319 led_classdev_unregister(led);
320 kfree(led);
321 }
322 goto out; /* but let the driver continue without LEDs */
323 }
324 }
325 out:
326 return 0;
327 err_free:
328 kfree(drv_data);
329 return ret;
330 }
331
332 static void steelseries_srws1_remove(struct hid_device *hdev)
333 {
334 int i;
335 struct led_classdev *led;
336
337 struct steelseries_srws1_data *drv_data = hid_get_drvdata(hdev);
338
339 if (drv_data) {
340 /* Deregister LEDs (if any) */
341 for (i = 0; i < SRWS1_NUMBER_LEDS + 1; i++) {
342 led = drv_data->led[i];
343 drv_data->led[i] = NULL;
344 if (!led)
345 continue;
346 led_classdev_unregister(led);
347 kfree(led);
348 }
349
350 }
351
352 hid_hw_stop(hdev);
353 kfree(drv_data);
354 return;
355 }
356 #endif
357
358 static __u8 *steelseries_srws1_report_fixup(struct hid_device *hdev, __u8 *rdesc,
359 unsigned int *rsize)
360 {
361 if (*rsize >= 115 && rdesc[11] == 0x02 && rdesc[13] == 0xc8
362 && rdesc[29] == 0xbb && rdesc[40] == 0xc5) {
363 hid_info(hdev, "Fixing up Steelseries SRW-S1 report descriptor\n");
364 rdesc = steelseries_srws1_rdesc_fixed;
365 *rsize = sizeof(steelseries_srws1_rdesc_fixed);
366 }
367 return rdesc;
368 }
369
370 static const struct hid_device_id steelseries_srws1_devices[] = {
371 { HID_USB_DEVICE(USB_VENDOR_ID_STEELSERIES, USB_DEVICE_ID_STEELSERIES_SRWS1) },
372 { }
373 };
374 MODULE_DEVICE_TABLE(hid, steelseries_srws1_devices);
375
376 static struct hid_driver steelseries_srws1_driver = {
377 .name = "steelseries_srws1",
378 .id_table = steelseries_srws1_devices,
379 #if IS_BUILTIN(CONFIG_LEDS_CLASS) || \
380 (IS_MODULE(CONFIG_LEDS_CLASS) && IS_MODULE(CONFIG_HID_STEELSERIES))
381 .probe = steelseries_srws1_probe,
382 .remove = steelseries_srws1_remove,
383 #endif
384 .report_fixup = steelseries_srws1_report_fixup
385 };
386
387 module_hid_driver(steelseries_srws1_driver);
388 MODULE_LICENSE("GPL");
Linux with added FPC-III support