1
2
3
4
5
6
7
8
9
10
11#include <linux/bitops.h>
12#include <linux/completion.h>
13#include <linux/hid.h>
14#include <linux/hwmon.h>
15#include <linux/kernel.h>
16#include <linux/module.h>
17#include <linux/mutex.h>
18#include <linux/slab.h>
19#include <linux/types.h>
20
21#define USB_VENDOR_ID_CORSAIR 0x1b1c
22#define USB_PRODUCT_ID_CORSAIR_COMMANDERPRO 0x0c10
23#define USB_PRODUCT_ID_CORSAIR_1000D 0x1d00
24
25#define OUT_BUFFER_SIZE 63
26#define IN_BUFFER_SIZE 16
27#define LABEL_LENGTH 11
28#define REQ_TIMEOUT 300
29
30#define CTL_GET_TMP_CNCT 0x10
31
32
33
34
35#define CTL_GET_TMP 0x11
36
37
38
39
40
41#define CTL_GET_VOLT 0x12
42
43
44
45
46#define CTL_GET_FAN_CNCT 0x20
47
48
49
50
51
52#define CTL_GET_FAN_RPM 0x21
53
54
55
56#define CTL_GET_FAN_PWM 0x22
57
58
59
60
61
62#define CTL_SET_FAN_FPWM 0x23
63
64
65
66
67#define CTL_SET_FAN_TARGET 0x24
68
69
70
71
72
73
74#define NUM_FANS 6
75#define NUM_TEMP_SENSORS 4
76
77struct ccp_device {
78 struct hid_device *hdev;
79 struct device *hwmon_dev;
80 struct completion wait_input_report;
81 struct mutex mutex;
82 u8 *buffer;
83 int target[6];
84 DECLARE_BITMAP(temp_cnct, NUM_TEMP_SENSORS);
85 DECLARE_BITMAP(fan_cnct, NUM_FANS);
86 char fan_label[6][LABEL_LENGTH];
87};
88
89
90static int ccp_get_errno(struct ccp_device *ccp)
91{
92 switch (ccp->buffer[0]) {
93 case 0x00:
94 return 0;
95 case 0x01:
96 return -EOPNOTSUPP;
97 case 0x10:
98 return -EINVAL;
99 case 0x11:
100 case 0x12:
101 return -ENODATA;
102 default:
103 hid_dbg(ccp->hdev, "unknown device response error: %d", ccp->buffer[0]);
104 return -EIO;
105 }
106}
107
108
109static int send_usb_cmd(struct ccp_device *ccp, u8 command, u8 byte1, u8 byte2, u8 byte3)
110{
111 unsigned long t;
112 int ret;
113
114 memset(ccp->buffer, 0x00, OUT_BUFFER_SIZE);
115 ccp->buffer[0] = command;
116 ccp->buffer[1] = byte1;
117 ccp->buffer[2] = byte2;
118 ccp->buffer[3] = byte3;
119
120 reinit_completion(&ccp->wait_input_report);
121
122 ret = hid_hw_output_report(ccp->hdev, ccp->buffer, OUT_BUFFER_SIZE);
123 if (ret < 0)
124 return ret;
125
126 t = wait_for_completion_timeout(&ccp->wait_input_report, msecs_to_jiffies(REQ_TIMEOUT));
127 if (!t)
128 return -ETIMEDOUT;
129
130 return ccp_get_errno(ccp);
131}
132
133static int ccp_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data, int size)
134{
135 struct ccp_device *ccp = hid_get_drvdata(hdev);
136
137
138 if (completion_done(&ccp->wait_input_report))
139 return 0;
140
141 memcpy(ccp->buffer, data, min(IN_BUFFER_SIZE, size));
142 complete(&ccp->wait_input_report);
143
144 return 0;
145}
146
147
148static int get_data(struct ccp_device *ccp, int command, int channel, bool two_byte_data)
149{
150 int ret;
151
152 mutex_lock(&ccp->mutex);
153
154 ret = send_usb_cmd(ccp, command, channel, 0, 0);
155 if (ret)
156 goto out_unlock;
157
158 ret = ccp->buffer[1];
159 if (two_byte_data)
160 ret = (ret << 8) + ccp->buffer[2];
161
162out_unlock:
163 mutex_unlock(&ccp->mutex);
164 return ret;
165}
166
167static int set_pwm(struct ccp_device *ccp, int channel, long val)
168{
169 int ret;
170
171 if (val < 0 || val > 255)
172 return -EINVAL;
173
174
175 val = DIV_ROUND_CLOSEST(val * 100, 255);
176
177 mutex_lock(&ccp->mutex);
178
179 ret = send_usb_cmd(ccp, CTL_SET_FAN_FPWM, channel, val, 0);
180 if (!ret)
181 ccp->target[channel] = -ENODATA;
182
183 mutex_unlock(&ccp->mutex);
184 return ret;
185}
186
187static int set_target(struct ccp_device *ccp, int channel, long val)
188{
189 int ret;
190
191 val = clamp_val(val, 0, 0xFFFF);
192 ccp->target[channel] = val;
193
194 mutex_lock(&ccp->mutex);
195 ret = send_usb_cmd(ccp, CTL_SET_FAN_TARGET, channel, val >> 8, val);
196
197 mutex_unlock(&ccp->mutex);
198 return ret;
199}
200
201static int ccp_read_string(struct device *dev, enum hwmon_sensor_types type,
202 u32 attr, int channel, const char **str)
203{
204 struct ccp_device *ccp = dev_get_drvdata(dev);
205
206 switch (type) {
207 case hwmon_fan:
208 switch (attr) {
209 case hwmon_fan_label:
210 *str = ccp->fan_label[channel];
211 return 0;
212 default:
213 break;
214 }
215 break;
216 default:
217 break;
218 }
219
220 return -EOPNOTSUPP;
221}
222
223static int ccp_read(struct device *dev, enum hwmon_sensor_types type,
224 u32 attr, int channel, long *val)
225{
226 struct ccp_device *ccp = dev_get_drvdata(dev);
227 int ret;
228
229 switch (type) {
230 case hwmon_temp:
231 switch (attr) {
232 case hwmon_temp_input:
233 ret = get_data(ccp, CTL_GET_TMP, channel, true);
234 if (ret < 0)
235 return ret;
236 *val = ret * 10;
237 return 0;
238 default:
239 break;
240 }
241 break;
242 case hwmon_fan:
243 switch (attr) {
244 case hwmon_fan_input:
245 ret = get_data(ccp, CTL_GET_FAN_RPM, channel, true);
246 if (ret < 0)
247 return ret;
248 *val = ret;
249 return 0;
250 case hwmon_fan_target:
251
252
253 if (ccp->target[channel] < 0)
254 return -ENODATA;
255 *val = ccp->target[channel];
256 return 0;
257 default:
258 break;
259 }
260 break;
261 case hwmon_pwm:
262 switch (attr) {
263 case hwmon_pwm_input:
264 ret = get_data(ccp, CTL_GET_FAN_PWM, channel, false);
265 if (ret < 0)
266 return ret;
267 *val = DIV_ROUND_CLOSEST(ret * 255, 100);
268 return 0;
269 default:
270 break;
271 }
272 break;
273 case hwmon_in:
274 switch (attr) {
275 case hwmon_in_input:
276 ret = get_data(ccp, CTL_GET_VOLT, channel, true);
277 if (ret < 0)
278 return ret;
279 *val = ret;
280 return 0;
281 default:
282 break;
283 }
284 break;
285 default:
286 break;
287 }
288
289 return -EOPNOTSUPP;
290};
291
292static int ccp_write(struct device *dev, enum hwmon_sensor_types type,
293 u32 attr, int channel, long val)
294{
295 struct ccp_device *ccp = dev_get_drvdata(dev);
296
297 switch (type) {
298 case hwmon_pwm:
299 switch (attr) {
300 case hwmon_pwm_input:
301 return set_pwm(ccp, channel, val);
302 default:
303 break;
304 }
305 break;
306 case hwmon_fan:
307 switch (attr) {
308 case hwmon_fan_target:
309 return set_target(ccp, channel, val);
310 default:
311 break;
312 }
313 break;
314 default:
315 break;
316 }
317
318 return -EOPNOTSUPP;
319};
320
321static umode_t ccp_is_visible(const void *data, enum hwmon_sensor_types type,
322 u32 attr, int channel)
323{
324 const struct ccp_device *ccp = data;
325
326 switch (type) {
327 case hwmon_temp:
328 if (!test_bit(channel, ccp->temp_cnct))
329 break;
330
331 switch (attr) {
332 case hwmon_temp_input:
333 return 0444;
334 case hwmon_temp_label:
335 return 0444;
336 default:
337 break;
338 }
339 break;
340 case hwmon_fan:
341 if (!test_bit(channel, ccp->fan_cnct))
342 break;
343
344 switch (attr) {
345 case hwmon_fan_input:
346 return 0444;
347 case hwmon_fan_label:
348 return 0444;
349 case hwmon_fan_target:
350 return 0644;
351 default:
352 break;
353 }
354 break;
355 case hwmon_pwm:
356 if (!test_bit(channel, ccp->fan_cnct))
357 break;
358
359 switch (attr) {
360 case hwmon_pwm_input:
361 return 0644;
362 default:
363 break;
364 }
365 break;
366 case hwmon_in:
367 switch (attr) {
368 case hwmon_in_input:
369 return 0444;
370 default:
371 break;
372 }
373 break;
374 default:
375 break;
376 }
377
378 return 0;
379};
380
381static const struct hwmon_ops ccp_hwmon_ops = {
382 .is_visible = ccp_is_visible,
383 .read = ccp_read,
384 .read_string = ccp_read_string,
385 .write = ccp_write,
386};
387
388static const struct hwmon_channel_info *ccp_info[] = {
389 HWMON_CHANNEL_INFO(chip,
390 HWMON_C_REGISTER_TZ),
391 HWMON_CHANNEL_INFO(temp,
392 HWMON_T_INPUT,
393 HWMON_T_INPUT,
394 HWMON_T_INPUT,
395 HWMON_T_INPUT
396 ),
397 HWMON_CHANNEL_INFO(fan,
398 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET,
399 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET,
400 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET,
401 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET,
402 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET,
403 HWMON_F_INPUT | HWMON_F_LABEL | HWMON_F_TARGET
404 ),
405 HWMON_CHANNEL_INFO(pwm,
406 HWMON_PWM_INPUT,
407 HWMON_PWM_INPUT,
408 HWMON_PWM_INPUT,
409 HWMON_PWM_INPUT,
410 HWMON_PWM_INPUT,
411 HWMON_PWM_INPUT
412 ),
413 HWMON_CHANNEL_INFO(in,
414 HWMON_I_INPUT,
415 HWMON_I_INPUT,
416 HWMON_I_INPUT
417 ),
418 NULL
419};
420
421static const struct hwmon_chip_info ccp_chip_info = {
422 .ops = &ccp_hwmon_ops,
423 .info = ccp_info,
424};
425
426
427static int get_fan_cnct(struct ccp_device *ccp)
428{
429 int channel;
430 int mode;
431 int ret;
432
433 ret = send_usb_cmd(ccp, CTL_GET_FAN_CNCT, 0, 0, 0);
434 if (ret)
435 return ret;
436
437 for (channel = 0; channel < NUM_FANS; channel++) {
438 mode = ccp->buffer[channel + 1];
439 if (mode == 0)
440 continue;
441
442 set_bit(channel, ccp->fan_cnct);
443 ccp->target[channel] = -ENODATA;
444
445 switch (mode) {
446 case 1:
447 scnprintf(ccp->fan_label[channel], LABEL_LENGTH,
448 "fan%d 3pin", channel + 1);
449 break;
450 case 2:
451 scnprintf(ccp->fan_label[channel], LABEL_LENGTH,
452 "fan%d 4pin", channel + 1);
453 break;
454 default:
455 scnprintf(ccp->fan_label[channel], LABEL_LENGTH,
456 "fan%d other", channel + 1);
457 break;
458 }
459 }
460
461 return 0;
462}
463
464
465static int get_temp_cnct(struct ccp_device *ccp)
466{
467 int channel;
468 int mode;
469 int ret;
470
471 ret = send_usb_cmd(ccp, CTL_GET_TMP_CNCT, 0, 0, 0);
472 if (ret)
473 return ret;
474
475 for (channel = 0; channel < NUM_TEMP_SENSORS; channel++) {
476 mode = ccp->buffer[channel + 1];
477 if (mode == 0)
478 continue;
479
480 set_bit(channel, ccp->temp_cnct);
481 }
482
483 return 0;
484}
485
486static int ccp_probe(struct hid_device *hdev, const struct hid_device_id *id)
487{
488 struct ccp_device *ccp;
489 int ret;
490
491 ccp = devm_kzalloc(&hdev->dev, sizeof(*ccp), GFP_KERNEL);
492 if (!ccp)
493 return -ENOMEM;
494
495 ccp->buffer = devm_kmalloc(&hdev->dev, OUT_BUFFER_SIZE, GFP_KERNEL);
496 if (!ccp->buffer)
497 return -ENOMEM;
498
499 ret = hid_parse(hdev);
500 if (ret)
501 return ret;
502
503 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
504 if (ret)
505 return ret;
506
507 ret = hid_hw_open(hdev);
508 if (ret)
509 goto out_hw_stop;
510
511 ccp->hdev = hdev;
512 hid_set_drvdata(hdev, ccp);
513 mutex_init(&ccp->mutex);
514 init_completion(&ccp->wait_input_report);
515
516 hid_device_io_start(hdev);
517
518
519 ret = get_temp_cnct(ccp);
520 if (ret)
521 goto out_hw_close;
522
523 ret = get_fan_cnct(ccp);
524 if (ret)
525 goto out_hw_close;
526 ccp->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsaircpro",
527 ccp, &ccp_chip_info, 0);
528 if (IS_ERR(ccp->hwmon_dev)) {
529 ret = PTR_ERR(ccp->hwmon_dev);
530 goto out_hw_close;
531 }
532
533 return 0;
534
535out_hw_close:
536 hid_hw_close(hdev);
537out_hw_stop:
538 hid_hw_stop(hdev);
539 return ret;
540}
541
542static void ccp_remove(struct hid_device *hdev)
543{
544 struct ccp_device *ccp = hid_get_drvdata(hdev);
545
546 hwmon_device_unregister(ccp->hwmon_dev);
547 hid_hw_close(hdev);
548 hid_hw_stop(hdev);
549}
550
551static const struct hid_device_id ccp_devices[] = {
552 { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_PRODUCT_ID_CORSAIR_COMMANDERPRO) },
553 { HID_USB_DEVICE(USB_VENDOR_ID_CORSAIR, USB_PRODUCT_ID_CORSAIR_1000D) },
554 { }
555};
556
557static struct hid_driver ccp_driver = {
558 .name = "corsair-cpro",
559 .id_table = ccp_devices,
560 .probe = ccp_probe,
561 .remove = ccp_remove,
562 .raw_event = ccp_raw_event,
563};
564
565MODULE_DEVICE_TABLE(hid, ccp_devices);
566MODULE_LICENSE("GPL");
567
568static int __init ccp_init(void)
569{
570 return hid_register_driver(&ccp_driver);
571}
572
573static void __exit ccp_exit(void)
574{
575 hid_unregister_driver(&ccp_driver);
576}
577
578
579
580
581
582late_initcall(ccp_init);
583module_exit(ccp_exit);
584
