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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * corsair-psu.c - Linux driver for Corsair power supplies with HID sensors interface
4 * Copyright (C) 2020 Wilken Gottwalt <wilken.gottwalt@posteo.net>
5 */
6
7#include <linux/completion.h>
8#include <linux/debugfs.h>
9#include <linux/errno.h>
10#include <linux/hid.h>
11#include <linux/hwmon.h>
12#include <linux/hwmon-sysfs.h>
13#include <linux/jiffies.h>
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/mutex.h>
17#include <linux/slab.h>
18#include <linux/types.h>
19
20/*
21 * Corsair protocol for PSUs
22 *
23 * message size = 64 bytes (request and response, little endian)
24 * request:
25 * [length][command][param0][param1][paramX]...
26 * reply:
27 * [echo of length][echo of command][data0][data1][dataX]...
28 *
29 * - commands are byte sized opcodes
30 * - length is the sum of all bytes of the commands/params
31 * - the micro-controller of most of these PSUs support concatenation in the request and reply,
32 * but it is better to not rely on this (it is also hard to parse)
33 * - the driver uses raw events to be accessible from userspace (though this is not really
34 * supported, it is just there for convenience, may be removed in the future)
35 * - a reply always start with the length and command in the same order the request used it
36 * - length of the reply data is specific to the command used
37 * - some of the commands work on a rail and can be switched to a specific rail (0 = 12v,
38 * 1 = 5v, 2 = 3.3v)
39 * - the format of the init command 0xFE is swapped length/command bytes
40 * - parameter bytes amount and values are specific to the command (rail setting is the only
41 * for now that uses non-zero values)
42 * - there are much more commands, especially for configuring the device, but they are not
43 * supported because a wrong command/length can lockup the micro-controller
44 * - the driver supports debugfs for values not fitting into the hwmon class
45 * - not every device class (HXi, RMi or AXi) supports all commands
46 * - it is a pure sensors reading driver (will not support configuring)
47 */
48
49#define DRIVER_NAME "corsair-psu"
50
51#define REPLY_SIZE 16 /* max length of a reply to a single command */
52#define CMD_BUFFER_SIZE 64
53#define CMD_TIMEOUT_MS 250
54#define SECONDS_PER_HOUR (60 * 60)
55#define SECONDS_PER_DAY (SECONDS_PER_HOUR * 24)
56#define RAIL_COUNT 3 /* 3v3 + 5v + 12v */
57#define TEMP_COUNT 2
58
59#define PSU_CMD_SELECT_RAIL 0x00 /* expects length 2 */
60#define PSU_CMD_RAIL_VOLTS_HCRIT 0x40 /* the rest of the commands expect length 3 */
61#define PSU_CMD_RAIL_VOLTS_LCRIT 0x44
62#define PSU_CMD_RAIL_AMPS_HCRIT 0x46
63#define PSU_CMD_TEMP_HCRIT 0x4F
64#define PSU_CMD_IN_VOLTS 0x88
65#define PSU_CMD_IN_AMPS 0x89
66#define PSU_CMD_RAIL_VOLTS 0x8B
67#define PSU_CMD_RAIL_AMPS 0x8C
68#define PSU_CMD_TEMP0 0x8D
69#define PSU_CMD_TEMP1 0x8E
70#define PSU_CMD_FAN 0x90
71#define PSU_CMD_RAIL_WATTS 0x96
72#define PSU_CMD_VEND_STR 0x99
73#define PSU_CMD_PROD_STR 0x9A
74#define PSU_CMD_TOTAL_WATTS 0xEE
75#define PSU_CMD_TOTAL_UPTIME 0xD1
76#define PSU_CMD_UPTIME 0xD2
77#define PSU_CMD_INIT 0xFE
78
79#define L_IN_VOLTS "v_in"
80#define L_OUT_VOLTS_12V "v_out +12v"
81#define L_OUT_VOLTS_5V "v_out +5v"
82#define L_OUT_VOLTS_3_3V "v_out +3.3v"
83#define L_IN_AMPS "curr in"
84#define L_AMPS_12V "curr +12v"
85#define L_AMPS_5V "curr +5v"
86#define L_AMPS_3_3V "curr +3.3v"
87#define L_FAN "psu fan"
88#define L_TEMP0 "vrm temp"
89#define L_TEMP1 "case temp"
90#define L_WATTS "power total"
91#define L_WATTS_12V "power +12v"
92#define L_WATTS_5V "power +5v"
93#define L_WATTS_3_3V "power +3.3v"
94
95static const char *const label_watts[] = {
96 L_WATTS,
97 L_WATTS_12V,
98 L_WATTS_5V,
99 L_WATTS_3_3V
100};
101
102static const char *const label_volts[] = {
103 L_IN_VOLTS,
104 L_OUT_VOLTS_12V,
105 L_OUT_VOLTS_5V,
106 L_OUT_VOLTS_3_3V
107};
108
109static const char *const label_amps[] = {
110 L_IN_AMPS,
111 L_AMPS_12V,
112 L_AMPS_5V,
113 L_AMPS_3_3V
114};
115
116struct corsairpsu_data {
117 struct hid_device *hdev;
118 struct device *hwmon_dev;
119 struct dentry *debugfs;
120 struct completion wait_completion;
121 struct mutex lock; /* for locking access to cmd_buffer */
122 u8 *cmd_buffer;
123 char vendor[REPLY_SIZE];
124 char product[REPLY_SIZE];
125 long temp_crit[TEMP_COUNT];
126 long in_crit[RAIL_COUNT];
127 long in_lcrit[RAIL_COUNT];
128 long curr_crit[RAIL_COUNT];
129 u8 temp_crit_support;
130 u8 in_crit_support;
131 u8 in_lcrit_support;
132 u8 curr_crit_support;
133 bool in_curr_cmd_support; /* not all commands are supported on every PSU */
134};
135
136/* some values are SMBus LINEAR11 data which need a conversion */
137static int corsairpsu_linear11_to_int(const u16 val, const int scale)
138{
139 const int exp = ((s16)val) >> 11;
140 const int mant = (((s16)(val & 0x7ff)) << 5) >> 5;
141 const int result = mant * scale;
142
143 return (exp >= 0) ? (result << exp) : (result >> -exp);
144}
145
146static int corsairpsu_usb_cmd(struct corsairpsu_data *priv, u8 p0, u8 p1, u8 p2, void *data)
147{
148 unsigned long time;
149 int ret;
150
151 memset(priv->cmd_buffer, 0, CMD_BUFFER_SIZE);
152 priv->cmd_buffer[0] = p0;
153 priv->cmd_buffer[1] = p1;
154 priv->cmd_buffer[2] = p2;
155
156 reinit_completion(&priv->wait_completion);
157
158 ret = hid_hw_output_report(priv->hdev, priv->cmd_buffer, CMD_BUFFER_SIZE);
159 if (ret < 0)
160 return ret;
161
162 time = wait_for_completion_timeout(&priv->wait_completion,
163 msecs_to_jiffies(CMD_TIMEOUT_MS));
164 if (!time)
165 return -ETIMEDOUT;
166
167 /*
168 * at the start of the reply is an echo of the send command/length in the same order it
169 * was send, not every command is supported on every device class, if a command is not
170 * supported, the length value in the reply is okay, but the command value is set to 0
171 */
172 if (p0 != priv->cmd_buffer[0] || p1 != priv->cmd_buffer[1])
173 return -EOPNOTSUPP;
174
175 if (data)
176 memcpy(data, priv->cmd_buffer + 2, REPLY_SIZE);
177
178 return 0;
179}
180
181static int corsairpsu_init(struct corsairpsu_data *priv)
182{
183 /*
184 * PSU_CMD_INIT uses swapped length/command and expects 2 parameter bytes, this command
185 * actually generates a reply, but we don't need it
186 */
187 return corsairpsu_usb_cmd(priv, PSU_CMD_INIT, 3, 0, NULL);
188}
189
190static int corsairpsu_fwinfo(struct corsairpsu_data *priv)
191{
192 int ret;
193
194 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_VEND_STR, 0, priv->vendor);
195 if (ret < 0)
196 return ret;
197
198 ret = corsairpsu_usb_cmd(priv, 3, PSU_CMD_PROD_STR, 0, priv->product);
199 if (ret < 0)
200 return ret;
201
202 return 0;
203}
204
205static int corsairpsu_request(struct corsairpsu_data *priv, u8 cmd, u8 rail, void *data)
206{
207 int ret;
208
209 mutex_lock(&priv->lock);
210 switch (cmd) {
211 case PSU_CMD_RAIL_VOLTS_HCRIT:
212 case PSU_CMD_RAIL_VOLTS_LCRIT:
213 case PSU_CMD_RAIL_AMPS_HCRIT:
214 case PSU_CMD_RAIL_VOLTS:
215 case PSU_CMD_RAIL_AMPS:
216 case PSU_CMD_RAIL_WATTS:
217 ret = corsairpsu_usb_cmd(priv, 2, PSU_CMD_SELECT_RAIL, rail, NULL);
218 if (ret < 0)
219 goto cmd_fail;
220 break;
221 default:
222 break;
223 }
224
225 ret = corsairpsu_usb_cmd(priv, 3, cmd, 0, data);
226
227cmd_fail:
228 mutex_unlock(&priv->lock);
229 return ret;
230}
231
232static int corsairpsu_get_value(struct corsairpsu_data *priv, u8 cmd, u8 rail, long *val)
233{
234 u8 data[REPLY_SIZE];
235 long tmp;
236 int ret;
237
238 ret = corsairpsu_request(priv, cmd, rail, data);
239 if (ret < 0)
240 return ret;
241
242 /*
243 * the biggest value here comes from the uptime command and to exceed MAXINT total uptime
244 * needs to be about 68 years, the rest are u16 values and the biggest value coming out of
245 * the LINEAR11 conversion are the watts values which are about 1200 for the strongest psu
246 * supported (HX1200i)
247 */
248 tmp = ((long)data[3] << 24) + (data[2] << 16) + (data[1] << 8) + data[0];
249 switch (cmd) {
250 case PSU_CMD_RAIL_VOLTS_HCRIT:
251 case PSU_CMD_RAIL_VOLTS_LCRIT:
252 case PSU_CMD_RAIL_AMPS_HCRIT:
253 case PSU_CMD_TEMP_HCRIT:
254 case PSU_CMD_IN_VOLTS:
255 case PSU_CMD_IN_AMPS:
256 case PSU_CMD_RAIL_VOLTS:
257 case PSU_CMD_RAIL_AMPS:
258 case PSU_CMD_TEMP0:
259 case PSU_CMD_TEMP1:
260 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000);
261 break;
262 case PSU_CMD_FAN:
263 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1);
264 break;
265 case PSU_CMD_RAIL_WATTS:
266 case PSU_CMD_TOTAL_WATTS:
267 *val = corsairpsu_linear11_to_int(tmp & 0xFFFF, 1000000);
268 break;
269 case PSU_CMD_TOTAL_UPTIME:
270 case PSU_CMD_UPTIME:
271 *val = tmp;
272 break;
273 default:
274 ret = -EOPNOTSUPP;
275 break;
276 }
277
278 return ret;
279}
280
281static void corsairpsu_get_criticals(struct corsairpsu_data *priv)
282{
283 long tmp;
284 int rail;
285
286 for (rail = 0; rail < TEMP_COUNT; ++rail) {
287 if (!corsairpsu_get_value(priv, PSU_CMD_TEMP_HCRIT, rail, &tmp)) {
288 priv->temp_crit_support |= BIT(rail);
289 priv->temp_crit[rail] = tmp;
290 }
291 }
292
293 for (rail = 0; rail < RAIL_COUNT; ++rail) {
294 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_HCRIT, rail, &tmp)) {
295 priv->in_crit_support |= BIT(rail);
296 priv->in_crit[rail] = tmp;
297 }
298
299 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS_LCRIT, rail, &tmp)) {
300 priv->in_lcrit_support |= BIT(rail);
301 priv->in_lcrit[rail] = tmp;
302 }
303
304 if (!corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS_HCRIT, rail, &tmp)) {
305 priv->curr_crit_support |= BIT(rail);
306 priv->curr_crit[rail] = tmp;
307 }
308 }
309}
310
311static void corsairpsu_check_cmd_support(struct corsairpsu_data *priv)
312{
313 long tmp;
314
315 priv->in_curr_cmd_support = !corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, &tmp);
316}
317
318static umode_t corsairpsu_hwmon_temp_is_visible(const struct corsairpsu_data *priv, u32 attr,
319 int channel)
320{
321 umode_t res = 0444;
322
323 switch (attr) {
324 case hwmon_temp_input:
325 case hwmon_temp_label:
326 case hwmon_temp_crit:
327 if (channel > 0 && !(priv->temp_crit_support & BIT(channel - 1)))
328 res = 0;
329 break;
330 default:
331 break;
332 }
333
334 return res;
335}
336
337static umode_t corsairpsu_hwmon_fan_is_visible(const struct corsairpsu_data *priv, u32 attr,
338 int channel)
339{
340 switch (attr) {
341 case hwmon_fan_input:
342 case hwmon_fan_label:
343 return 0444;
344 default:
345 return 0;
346 }
347}
348
349static umode_t corsairpsu_hwmon_power_is_visible(const struct corsairpsu_data *priv, u32 attr,
350 int channel)
351{
352 switch (attr) {
353 case hwmon_power_input:
354 case hwmon_power_label:
355 return 0444;
356 default:
357 return 0;
358 }
359}
360
361static umode_t corsairpsu_hwmon_in_is_visible(const struct corsairpsu_data *priv, u32 attr,
362 int channel)
363{
364 umode_t res = 0444;
365
366 switch (attr) {
367 case hwmon_in_input:
368 case hwmon_in_label:
369 case hwmon_in_crit:
370 if (channel > 0 && !(priv->in_crit_support & BIT(channel - 1)))
371 res = 0;
372 break;
373 case hwmon_in_lcrit:
374 if (channel > 0 && !(priv->in_lcrit_support & BIT(channel - 1)))
375 res = 0;
376 break;
377 default:
378 break;
379 }
380
381 return res;
382}
383
384static umode_t corsairpsu_hwmon_curr_is_visible(const struct corsairpsu_data *priv, u32 attr,
385 int channel)
386{
387 umode_t res = 0444;
388
389 switch (attr) {
390 case hwmon_curr_input:
391 if (channel == 0 && !priv->in_curr_cmd_support)
392 res = 0;
393 break;
394 case hwmon_curr_label:
395 case hwmon_curr_crit:
396 if (channel > 0 && !(priv->curr_crit_support & BIT(channel - 1)))
397 res = 0;
398 break;
399 default:
400 break;
401 }
402
403 return res;
404}
405
406static umode_t corsairpsu_hwmon_ops_is_visible(const void *data, enum hwmon_sensor_types type,
407 u32 attr, int channel)
408{
409 const struct corsairpsu_data *priv = data;
410
411 switch (type) {
412 case hwmon_temp:
413 return corsairpsu_hwmon_temp_is_visible(priv, attr, channel);
414 case hwmon_fan:
415 return corsairpsu_hwmon_fan_is_visible(priv, attr, channel);
416 case hwmon_power:
417 return corsairpsu_hwmon_power_is_visible(priv, attr, channel);
418 case hwmon_in:
419 return corsairpsu_hwmon_in_is_visible(priv, attr, channel);
420 case hwmon_curr:
421 return corsairpsu_hwmon_curr_is_visible(priv, attr, channel);
422 default:
423 return 0;
424 }
425}
426
427static int corsairpsu_hwmon_temp_read(struct corsairpsu_data *priv, u32 attr, int channel,
428 long *val)
429{
430 int err = -EOPNOTSUPP;
431
432 switch (attr) {
433 case hwmon_temp_input:
434 return corsairpsu_get_value(priv, channel ? PSU_CMD_TEMP1 : PSU_CMD_TEMP0,
435 channel, val);
436 case hwmon_temp_crit:
437 *val = priv->temp_crit[channel];
438 err = 0;
439 break;
440 default:
441 break;
442 }
443
444 return err;
445}
446
447static int corsairpsu_hwmon_power_read(struct corsairpsu_data *priv, u32 attr, int channel,
448 long *val)
449{
450 if (attr == hwmon_power_input) {
451 switch (channel) {
452 case 0:
453 return corsairpsu_get_value(priv, PSU_CMD_TOTAL_WATTS, 0, val);
454 case 1 ... 3:
455 return corsairpsu_get_value(priv, PSU_CMD_RAIL_WATTS, channel - 1, val);
456 default:
457 break;
458 }
459 }
460
461 return -EOPNOTSUPP;
462}
463
464static int corsairpsu_hwmon_in_read(struct corsairpsu_data *priv, u32 attr, int channel, long *val)
465{
466 int err = -EOPNOTSUPP;
467
468 switch (attr) {
469 case hwmon_in_input:
470 switch (channel) {
471 case 0:
472 return corsairpsu_get_value(priv, PSU_CMD_IN_VOLTS, 0, val);
473 case 1 ... 3:
474 return corsairpsu_get_value(priv, PSU_CMD_RAIL_VOLTS, channel - 1, val);
475 default:
476 break;
477 }
478 break;
479 case hwmon_in_crit:
480 *val = priv->in_crit[channel - 1];
481 err = 0;
482 break;
483 case hwmon_in_lcrit:
484 *val = priv->in_lcrit[channel - 1];
485 err = 0;
486 break;
487 }
488
489 return err;
490}
491
492static int corsairpsu_hwmon_curr_read(struct corsairpsu_data *priv, u32 attr, int channel,
493 long *val)
494{
495 int err = -EOPNOTSUPP;
496
497 switch (attr) {
498 case hwmon_curr_input:
499 switch (channel) {
500 case 0:
501 return corsairpsu_get_value(priv, PSU_CMD_IN_AMPS, 0, val);
502 case 1 ... 3:
503 return corsairpsu_get_value(priv, PSU_CMD_RAIL_AMPS, channel - 1, val);
504 default:
505 break;
506 }
507 break;
508 case hwmon_curr_crit:
509 *val = priv->curr_crit[channel - 1];
510 err = 0;
511 break;
512 default:
513 break;
514 }
515
516 return err;
517}
518
519static int corsairpsu_hwmon_ops_read(struct device *dev, enum hwmon_sensor_types type, u32 attr,
520 int channel, long *val)
521{
522 struct corsairpsu_data *priv = dev_get_drvdata(dev);
523
524 switch (type) {
525 case hwmon_temp:
526 return corsairpsu_hwmon_temp_read(priv, attr, channel, val);
527 case hwmon_fan:
528 if (attr == hwmon_fan_input)
529 return corsairpsu_get_value(priv, PSU_CMD_FAN, 0, val);
530 return -EOPNOTSUPP;
531 case hwmon_power:
532 return corsairpsu_hwmon_power_read(priv, attr, channel, val);
533 case hwmon_in:
534 return corsairpsu_hwmon_in_read(priv, attr, channel, val);
535 case hwmon_curr:
536 return corsairpsu_hwmon_curr_read(priv, attr, channel, val);
537 default:
538 return -EOPNOTSUPP;
539 }
540}
541
542static int corsairpsu_hwmon_ops_read_string(struct device *dev, enum hwmon_sensor_types type,
543 u32 attr, int channel, const char **str)
544{
545 if (type == hwmon_temp && attr == hwmon_temp_label) {
546 *str = channel ? L_TEMP1 : L_TEMP0;
547 return 0;
548 } else if (type == hwmon_fan && attr == hwmon_fan_label) {
549 *str = L_FAN;
550 return 0;
551 } else if (type == hwmon_power && attr == hwmon_power_label && channel < 4) {
552 *str = label_watts[channel];
553 return 0;
554 } else if (type == hwmon_in && attr == hwmon_in_label && channel < 4) {
555 *str = label_volts[channel];
556 return 0;
557 } else if (type == hwmon_curr && attr == hwmon_curr_label && channel < 4) {
558 *str = label_amps[channel];
559 return 0;
560 }
561
562 return -EOPNOTSUPP;
563}
564
565static const struct hwmon_ops corsairpsu_hwmon_ops = {
566 .is_visible = corsairpsu_hwmon_ops_is_visible,
567 .read = corsairpsu_hwmon_ops_read,
568 .read_string = corsairpsu_hwmon_ops_read_string,
569};
570
571static const struct hwmon_channel_info *corsairpsu_info[] = {
572 HWMON_CHANNEL_INFO(chip,
573 HWMON_C_REGISTER_TZ),
574 HWMON_CHANNEL_INFO(temp,
575 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT,
576 HWMON_T_INPUT | HWMON_T_LABEL | HWMON_T_CRIT),
577 HWMON_CHANNEL_INFO(fan,
578 HWMON_F_INPUT | HWMON_F_LABEL),
579 HWMON_CHANNEL_INFO(power,
580 HWMON_P_INPUT | HWMON_P_LABEL,
581 HWMON_P_INPUT | HWMON_P_LABEL,
582 HWMON_P_INPUT | HWMON_P_LABEL,
583 HWMON_P_INPUT | HWMON_P_LABEL),
584 HWMON_CHANNEL_INFO(in,
585 HWMON_I_INPUT | HWMON_I_LABEL,
586 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT,
587 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT,
588 HWMON_I_INPUT | HWMON_I_LABEL | HWMON_I_LCRIT | HWMON_I_CRIT),
589 HWMON_CHANNEL_INFO(curr,
590 HWMON_C_INPUT | HWMON_C_LABEL,
591 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT,
592 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT,
593 HWMON_C_INPUT | HWMON_C_LABEL | HWMON_C_CRIT),
594 NULL
595};
596
597static const struct hwmon_chip_info corsairpsu_chip_info = {
598 .ops = &corsairpsu_hwmon_ops,
599 .info = corsairpsu_info,
600};
601
602#ifdef CONFIG_DEBUG_FS
603
604static void print_uptime(struct seq_file *seqf, u8 cmd)
605{
606 struct corsairpsu_data *priv = seqf->private;
607 long val;
608 int ret;
609
610 ret = corsairpsu_get_value(priv, cmd, 0, &val);
611 if (ret < 0) {
612 seq_puts(seqf, "N/A\n");
613 return;
614 }
615
616 if (val > SECONDS_PER_DAY) {
617 seq_printf(seqf, "%ld day(s), %02ld:%02ld:%02ld\n", val / SECONDS_PER_DAY,
618 val % SECONDS_PER_DAY / SECONDS_PER_HOUR, val % SECONDS_PER_HOUR / 60,
619 val % 60);
620 return;
621 }
622
623 seq_printf(seqf, "%02ld:%02ld:%02ld\n", val % SECONDS_PER_DAY / SECONDS_PER_HOUR,
624 val % SECONDS_PER_HOUR / 60, val % 60);
625}
626
627static int uptime_show(struct seq_file *seqf, void *unused)
628{
629 print_uptime(seqf, PSU_CMD_UPTIME);
630
631 return 0;
632}
633DEFINE_SHOW_ATTRIBUTE(uptime);
634
635static int uptime_total_show(struct seq_file *seqf, void *unused)
636{
637 print_uptime(seqf, PSU_CMD_TOTAL_UPTIME);
638
639 return 0;
640}
641DEFINE_SHOW_ATTRIBUTE(uptime_total);
642
643static int vendor_show(struct seq_file *seqf, void *unused)
644{
645 struct corsairpsu_data *priv = seqf->private;
646
647 seq_printf(seqf, "%s\n", priv->vendor);
648
649 return 0;
650}
651DEFINE_SHOW_ATTRIBUTE(vendor);
652
653static int product_show(struct seq_file *seqf, void *unused)
654{
655 struct corsairpsu_data *priv = seqf->private;
656
657 seq_printf(seqf, "%s\n", priv->product);
658
659 return 0;
660}
661DEFINE_SHOW_ATTRIBUTE(product);
662
663static void corsairpsu_debugfs_init(struct corsairpsu_data *priv)
664{
665 char name[32];
666
667 scnprintf(name, sizeof(name), "%s-%s", DRIVER_NAME, dev_name(&priv->hdev->dev));
668
669 priv->debugfs = debugfs_create_dir(name, NULL);
670 debugfs_create_file("uptime", 0444, priv->debugfs, priv, &uptime_fops);
671 debugfs_create_file("uptime_total", 0444, priv->debugfs, priv, &uptime_total_fops);
672 debugfs_create_file("vendor", 0444, priv->debugfs, priv, &vendor_fops);
673 debugfs_create_file("product", 0444, priv->debugfs, priv, &product_fops);
674}
675
676#else
677
678static void corsairpsu_debugfs_init(struct corsairpsu_data *priv)
679{
680}
681
682#endif
683
684static int corsairpsu_probe(struct hid_device *hdev, const struct hid_device_id *id)
685{
686 struct corsairpsu_data *priv;
687 int ret;
688
689 priv = devm_kzalloc(&hdev->dev, sizeof(struct corsairpsu_data), GFP_KERNEL);
690 if (!priv)
691 return -ENOMEM;
692
693 priv->cmd_buffer = devm_kmalloc(&hdev->dev, CMD_BUFFER_SIZE, GFP_KERNEL);
694 if (!priv->cmd_buffer)
695 return -ENOMEM;
696
697 ret = hid_parse(hdev);
698 if (ret)
699 return ret;
700
701 ret = hid_hw_start(hdev, HID_CONNECT_HIDRAW);
702 if (ret)
703 return ret;
704
705 ret = hid_hw_open(hdev);
706 if (ret)
707 goto fail_and_stop;
708
709 priv->hdev = hdev;
710 hid_set_drvdata(hdev, priv);
711 mutex_init(&priv->lock);
712 init_completion(&priv->wait_completion);
713
714 hid_device_io_start(hdev);
715
716 ret = corsairpsu_init(priv);
717 if (ret < 0) {
718 dev_err(&hdev->dev, "unable to initialize device (%d)\n", ret);
719 goto fail_and_stop;
720 }
721
722 ret = corsairpsu_fwinfo(priv);
723 if (ret < 0) {
724 dev_err(&hdev->dev, "unable to query firmware (%d)\n", ret);
725 goto fail_and_stop;
726 }
727
728 corsairpsu_get_criticals(priv);
729 corsairpsu_check_cmd_support(priv);
730
731 priv->hwmon_dev = hwmon_device_register_with_info(&hdev->dev, "corsairpsu", priv,
732 &corsairpsu_chip_info, 0);
733
734 if (IS_ERR(priv->hwmon_dev)) {
735 ret = PTR_ERR(priv->hwmon_dev);
736 goto fail_and_close;
737 }
738
739 corsairpsu_debugfs_init(priv);
740
741 return 0;
742
743fail_and_close:
744 hid_hw_close(hdev);
745fail_and_stop:
746 hid_hw_stop(hdev);
747 return ret;
748}
749
750static void corsairpsu_remove(struct hid_device *hdev)
751{
752 struct corsairpsu_data *priv = hid_get_drvdata(hdev);
753
754 debugfs_remove_recursive(priv->debugfs);
755 hwmon_device_unregister(priv->hwmon_dev);
756 hid_hw_close(hdev);
757 hid_hw_stop(hdev);
758}
759
760static int corsairpsu_raw_event(struct hid_device *hdev, struct hid_report *report, u8 *data,
761 int size)
762{
763 struct corsairpsu_data *priv = hid_get_drvdata(hdev);
764
765 if (completion_done(&priv->wait_completion))
766 return 0;
767
768 memcpy(priv->cmd_buffer, data, min(CMD_BUFFER_SIZE, size));
769 complete(&priv->wait_completion);
770
771 return 0;
772}
773
774#ifdef CONFIG_PM
775static int corsairpsu_resume(struct hid_device *hdev)
776{
777 struct corsairpsu_data *priv = hid_get_drvdata(hdev);
778
779 /* some PSUs turn off the microcontroller during standby, so a reinit is required */
780 return corsairpsu_init(priv);
781}
782#endif
783
784static const struct hid_device_id corsairpsu_idtable[] = {
785 { HID_USB_DEVICE(0x1b1c, 0x1c03) }, /* Corsair HX550i */
786 { HID_USB_DEVICE(0x1b1c, 0x1c04) }, /* Corsair HX650i */
787 { HID_USB_DEVICE(0x1b1c, 0x1c05) }, /* Corsair HX750i */
788 { HID_USB_DEVICE(0x1b1c, 0x1c06) }, /* Corsair HX850i */
789 { HID_USB_DEVICE(0x1b1c, 0x1c07) }, /* Corsair HX1000i */
790 { HID_USB_DEVICE(0x1b1c, 0x1c08) }, /* Corsair HX1200i */
791 { HID_USB_DEVICE(0x1b1c, 0x1c09) }, /* Corsair RM550i */
792 { HID_USB_DEVICE(0x1b1c, 0x1c0a) }, /* Corsair RM650i */
793 { HID_USB_DEVICE(0x1b1c, 0x1c0b) }, /* Corsair RM750i */
794 { HID_USB_DEVICE(0x1b1c, 0x1c0c) }, /* Corsair RM850i */
795 { HID_USB_DEVICE(0x1b1c, 0x1c0d) }, /* Corsair RM1000i */
796 { },
797};
798MODULE_DEVICE_TABLE(hid, corsairpsu_idtable);
799
800static struct hid_driver corsairpsu_driver = {
801 .name = DRIVER_NAME,
802 .id_table = corsairpsu_idtable,
803 .probe = corsairpsu_probe,
804 .remove = corsairpsu_remove,
805 .raw_event = corsairpsu_raw_event,
806#ifdef CONFIG_PM
807 .resume = corsairpsu_resume,
808 .reset_resume = corsairpsu_resume,
809#endif
810};
811module_hid_driver(corsairpsu_driver);
812
813MODULE_LICENSE("GPL");
814MODULE_AUTHOR("Wilken Gottwalt <wilken.gottwalt@posteo.net>");
815MODULE_DESCRIPTION("Linux driver for Corsair power supplies with HID sensors interface");