1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Lenovo Other Mode WMI interface driver.
4 *
5 * This driver uses the fw_attributes class to expose the various WMI functions
6 * provided by the "Other Mode" WMI interface. This enables CPU and GPU power
7 * limit as well as various other attributes for devices that fall under the
8 * "Gaming Series" of Lenovo laptop devices. Each attribute exposed by the
9 * "Other Mode" interface has a corresponding Capability Data struct that
10 * allows the driver to probe details about the attribute such as if it is
11 * supported by the hardware, the default_value, max_value, min_value, and step
12 * increment.
13 *
14 * These attributes typically don't fit anywhere else in the sysfs and are set
15 * in Windows using one of Lenovo's multiple user applications.
16 *
17 * Additionally, this driver also exports tunable fan speed RPM to HWMON.
18 * Min/max RPM are also provided for reference.
19 *
20 * Copyright (C) 2025 Derek J. Clark <derekjohn.clark@gmail.com>
21 * - fw_attributes
22 * - binding to Capability Data 01
23 *
24 * Copyright (C) 2025 Rong Zhang <i@rong.moe>
25 * - HWMON
26 * - binding to Capability Data 00 and Fan
27 */
28
29 #include <linux/acpi.h>
30 #include <linux/bitfield.h>
31 #include <linux/cleanup.h>
32 #include <linux/component.h>
33 #include <linux/container_of.h>
34 #include <linux/device.h>
35 #include <linux/export.h>
36 #include <linux/firmware_attributes.h>
37 #include <linux/gfp_types.h>
38 #include <linux/hwmon.h>
39 #include <linux/idr.h>
40 #include <linux/kdev_t.h>
41 #include <linux/kobject.h>
42 #include <linux/limits.h>
43 #include <linux/module.h>
44 #include <linux/platform_profile.h>
45 #include <linux/power_supply.h>
46 #include <linux/types.h>
47 #include <linux/wmi.h>
48
49 #include <acpi/battery.h>
50
51 #include "wmi-capdata.h"
52 #include "wmi-events.h"
53 #include "wmi-helpers.h"
54
55 #define LENOVO_OTHER_MODE_GUID "DC2A8805-3A8C-41BA-A6F7-092E0089CD3B"
56
57 enum lwmi_feature_id_cpu {
58 LWMI_FEATURE_ID_CPU_SPPT = 0x01,
59 LWMI_FEATURE_ID_CPU_SPL = 0x02,
60 LWMI_FEATURE_ID_CPU_FPPT = 0x03,
61 LWMI_FEATURE_ID_CPU_TEMP = 0x04,
62 LWMI_FEATURE_ID_CPU_APU = 0x05,
63 LWMI_FEATURE_ID_CPU_CL = 0x06,
64 LWMI_FEATURE_ID_CPU_TAU = 0x07,
65 LWMI_FEATURE_ID_CPU_IPL = 0x09,
66 };
67
68 enum lwmi_feature_id_gpu {
69 LWMI_FEATURE_ID_GPU_NV_PPAB = 0x01,
70 LWMI_FEATURE_ID_GPU_NV_CTGP = 0x02,
71 LWMI_FEATURE_ID_GPU_TEMP = 0x03,
72 LWMI_FEATURE_ID_GPU_AC_OFFSET = 0x04,
73 LWMI_FEATURE_ID_DGPU_BOOST_CLK = 0x06,
74 LWMI_FEATURE_ID_DGPU_EN = 0x07,
75 LWMI_FEATURE_ID_GPU_MODE = 0x08,
76 LWMI_FEATURE_ID_DGPU_DIDVID = 0x09,
77 LWMI_FEATURE_ID_GPU_NV_BPL = 0x0a,
78 LWMI_FEATURE_ID_GPU_NV_CPU_BOOST = 0x0b,
79 };
80
81 enum lwmi_feature_id_psu {
82 LWMI_FEATURE_ID_PSU_CHARGE_TYPES = 0x01,
83 LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR = 0x02,
84 };
85
86 #define LWMI_FEATURE_ID_FAN_RPM 0x03
87
88 #define LWMI_TYPE_ID_CROSSLOAD 0x01
89 #define LWMI_TYPE_ID_PSU_AC 0x01
90
91 #define LWMI_FEATURE_VALUE_GET 17
92 #define LWMI_FEATURE_VALUE_SET 18
93
94 #define LWMI_FAN_ID_BASE 1
95 #define LWMI_FAN_NR 4
96 #define LWMI_FAN_ID(x) ((x) + LWMI_FAN_ID_BASE)
97
98 #define LWMI_FAN_DIV 100
99
100 #define LWMI_CHARGE_BEHAVIOR_DISCHARGE 0x00
101 #define LWMI_CHARGE_BEHAVIOR_AUTO 0x01
102 #define LWMI_CHARGE_TYPE_STANDARD 0x00
103 #define LWMI_CHARGE_TYPE_LONGLIFE 0x01
104
105 #define LWMI_ATTR_ID_FAN_RPM(x) \
106 lwmi_attr_id(LWMI_DEVICE_ID_FAN, LWMI_FEATURE_ID_FAN_RPM, \
107 LWMI_GZ_THERMAL_MODE_NONE, LWMI_FAN_ID(x))
108
109 #define LWMI_ATTR_ID_PSU(feat, type) \
110 lwmi_attr_id(LWMI_DEVICE_ID_PSU, feat, \
111 LWMI_GZ_THERMAL_MODE_NONE, type)
112
113 #define LWMI_OM_SYSFS_NAME "lenovo-wmi-other"
114 #define LWMI_OM_HWMON_NAME "lenovo_wmi_other"
115
116 static DEFINE_IDA(lwmi_om_ida);
117
118 enum attribute_property {
119 DEFAULT_VAL,
120 MAX_VAL,
121 MIN_VAL,
122 STEP_VAL,
123 SUPPORTED,
124 };
125
126 struct lwmi_fan_info {
127 u32 supported;
128 u32 last_target;
129 long min_rpm;
130 long max_rpm;
131 };
132
133 struct lwmi_om_priv {
134 struct component_master_ops *ops;
135
136 /* only valid after capdata bind */
137 struct cd_list *cd00_list;
138 struct cd_list *cd01_list;
139
140 struct device *hwmon_dev;
141 struct device *fw_attr_dev;
142 struct kset *fw_attr_kset;
143 struct wmi_device *wdev;
144 int ida_id;
145
146 struct lwmi_fan_info fan_info[LWMI_FAN_NR];
147
148 struct {
149 bool capdata00_collected : 1;
150 bool capdata_fan_collected : 1;
151 } fan_flags;
152
153 enum power_supply_charge_behaviour charge_behaviour;
154 const struct power_supply_ext *battery_ext;
155 struct acpi_battery_hook battery_hook;
156 bool bh_registered;
157 };
158
159 /*
160 * Visibility of fan channels:
161 *
162 * +-------------------+---------+------------------+-----------------------+------------+
163 * | | default | +expose_all_fans | +relax_fan_constraint | +both |
164 * +-------------------+---------+------------------+-----------------------+------------+
165 * | canonical | RW | RW | RW+relaxed | RW+relaxed |
166 * +-------------------+---------+------------------+-----------------------+------------+
167 * | -capdata_fan[idx] | N | RO | N | RW+relaxed |
168 * +-------------------+---------+------------------+-----------------------+------------+
169 *
170 * Note:
171 * 1. LWMI_ATTR_ID_FAN_RPM[idx].supported is always checked before exposing a channel.
172 * 2. -capdata_fan implies -capdata_fan[idx].
173 */
174 static bool expose_all_fans;
175 module_param(expose_all_fans, bool, 0444);
176 MODULE_PARM_DESC(expose_all_fans,
177 "This option skips some capability checks and solely relies on per-channel ones "
178 "to expose fan attributes. Use with caution.");
179
180 static bool relax_fan_constraint;
181 module_param(relax_fan_constraint, bool, 0444);
182 MODULE_PARM_DESC(relax_fan_constraint,
183 "Do not enforce fan RPM constraint (div/min/max) "
184 "and enables fan tuning when such data is missing. "
185 "Enabling this may results in HWMON attributes being out-of-sync, "
186 "and setting a too low RPM stops the fan. Use with caution.");
187
188 /* Visibility of power supply extensions */
189 static bool force_load_psy_ext;
190 module_param(force_load_psy_ext, bool, 0444);
191 MODULE_PARM_DESC(force_load_psy_ext,
192 "This option will skip checking if the ideapad_laptop driver will conflict "
193 "with adding an extension to set the battery charge behavior and battery charge "
194 "control end threshold. It will also skip checking if the BIOS reports that "
195 "those features are fully supported. It is recommended to blacklist the ideapad "
196 "driver before using this option.");
197
198 /* ======== HWMON (component: lenovo-wmi-capdata 00 & fan) ======== */
199
200 /**
201 * lwmi_om_fan_get_set() - Get or set fan RPM value of specified fan
202 * @priv: Driver private data structure
203 * @channel: Fan channel index (0-based)
204 * @val: Pointer to value (input for set, output for get)
205 * @set: True to set value, false to get value
206 *
207 * Communicates with WMI interface to either retrieve current fan RPM
208 * or set target fan RPM.
209 *
210 * Return: 0 on success, or an error code.
211 */
lwmi_om_fan_get_set(struct lwmi_om_priv * priv,int channel,u32 * val,bool set)212 static int lwmi_om_fan_get_set(struct lwmi_om_priv *priv, int channel, u32 *val, bool set)
213 {
214 struct wmi_method_args_32 args = {};
215 u32 method_id, retval;
216 int err;
217
218 method_id = set ? LWMI_FEATURE_VALUE_SET : LWMI_FEATURE_VALUE_GET;
219 args.arg0 = LWMI_ATTR_ID_FAN_RPM(channel);
220 args.arg1 = set ? *val : 0;
221
222 err = lwmi_dev_evaluate_int(priv->wdev, 0x0, method_id,
223 (unsigned char *)&args, sizeof(args), &retval);
224 if (err)
225 return err;
226
227 if (!set) {
228 *val = retval;
229 return 0;
230 }
231
232 /*
233 * It seems that 0 means "no error" and 1 means "done". Apparently
234 * different firmware teams have different thoughts on indicating
235 * success, so we accepts both.
236 */
237 return (retval == 0 || retval == 1) ? 0 : -EIO;
238 }
239
240 /**
241 * lwmi_om_hwmon_is_visible() - Determine visibility of HWMON attributes
242 * @drvdata: Driver private data
243 * @type: Sensor type
244 * @attr: Attribute identifier
245 * @channel: Channel index
246 *
247 * Determines whether an HWMON attribute should be visible in sysfs
248 * based on hardware capabilities and current configuration.
249 *
250 * Return: permission mode, or 0 if invisible.
251 */
lwmi_om_hwmon_is_visible(const void * drvdata,enum hwmon_sensor_types type,u32 attr,int channel)252 static umode_t lwmi_om_hwmon_is_visible(const void *drvdata, enum hwmon_sensor_types type,
253 u32 attr, int channel)
254 {
255 struct lwmi_om_priv *priv = (struct lwmi_om_priv *)drvdata;
256 bool visible = false;
257
258 if (type == hwmon_fan) {
259 if (!(priv->fan_info[channel].supported & LWMI_SUPP_VALID))
260 return 0;
261
262 switch (attr) {
263 case hwmon_fan_target:
264 if (!(priv->fan_info[channel].supported & LWMI_SUPP_SET))
265 return 0;
266
267 if (relax_fan_constraint ||
268 (priv->fan_info[channel].min_rpm >= 0 &&
269 priv->fan_info[channel].max_rpm >= 0))
270 return 0644;
271
272 /*
273 * Reaching here implies expose_all_fans is set.
274 * See lwmi_om_hwmon_add().
275 */
276 dev_warn_once(&priv->wdev->dev,
277 "fan tuning disabled due to missing RPM constraint\n");
278 return 0;
279 case hwmon_fan_div:
280 case hwmon_fan_input:
281 visible = priv->fan_info[channel].supported & LWMI_SUPP_GET;
282 break;
283 case hwmon_fan_min:
284 visible = priv->fan_info[channel].min_rpm >= 0;
285 break;
286 case hwmon_fan_max:
287 visible = priv->fan_info[channel].max_rpm >= 0;
288 break;
289 }
290 }
291
292 return visible ? 0444 : 0;
293 }
294
295 /**
296 * lwmi_om_hwmon_read() - Read HWMON sensor data
297 * @dev: Device pointer
298 * @type: Sensor type
299 * @attr: Attribute identifier
300 * @channel: Channel index
301 * @val: Pointer to store value
302 *
303 * Reads current sensor values from hardware through WMI interface.
304 *
305 * Return: 0 on success, or an error code.
306 */
lwmi_om_hwmon_read(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long * val)307 static int lwmi_om_hwmon_read(struct device *dev, enum hwmon_sensor_types type,
308 u32 attr, int channel, long *val)
309 {
310 struct lwmi_om_priv *priv = dev_get_drvdata(dev);
311 u32 retval = 0;
312 int err;
313
314 if (type == hwmon_fan) {
315 switch (attr) {
316 /*
317 * The EC has an internal RPM divisor (i.e., the raw register value is
318 * RPM / fanY_div). For fanY_input, the WMI method reads the register
319 * value and returns raw * fanY_div. For fanY_target, the WMI method
320 * divides the written value by fanY_div before writing it to the EC.
321 *
322 * As a result, reading fanY_input always returns a multiple of fanY_div,
323 * while writing to fanY_target loses the remainder.
324 */
325 case hwmon_fan_div:
326 *val = LWMI_FAN_DIV;
327 return 0;
328 case hwmon_fan_input:
329 err = lwmi_om_fan_get_set(priv, channel, &retval, false);
330 if (err)
331 return err;
332
333 *val = retval;
334 return 0;
335 case hwmon_fan_target:
336 *val = priv->fan_info[channel].last_target;
337 return 0;
338 case hwmon_fan_min:
339 *val = priv->fan_info[channel].min_rpm;
340 return 0;
341 case hwmon_fan_max:
342 *val = priv->fan_info[channel].max_rpm;
343 return 0;
344 }
345 }
346
347 return -EOPNOTSUPP;
348 }
349
350 /**
351 * lwmi_om_hwmon_write() - Write HWMON sensor data
352 * @dev: Device pointer
353 * @type: Sensor type
354 * @attr: Attribute identifier
355 * @channel: Channel index
356 * @val: Value to write
357 *
358 * Writes configuration values to hardware through WMI interface.
359 *
360 * Return: 0 on success, or an error code.
361 */
lwmi_om_hwmon_write(struct device * dev,enum hwmon_sensor_types type,u32 attr,int channel,long val)362 static int lwmi_om_hwmon_write(struct device *dev, enum hwmon_sensor_types type,
363 u32 attr, int channel, long val)
364 {
365 struct lwmi_om_priv *priv = dev_get_drvdata(dev);
366 u32 raw, min_rpm, max_rpm;
367 int err;
368
369 if (type == hwmon_fan) {
370 switch (attr) {
371 case hwmon_fan_target:
372 if (relax_fan_constraint) {
373 min_rpm = 1;
374 max_rpm = U16_MAX;
375 } else {
376 min_rpm = priv->fan_info[channel].min_rpm;
377 max_rpm = priv->fan_info[channel].max_rpm;
378 }
379
380 /* 0 means "auto". */
381 if (val != 0 && (val < min_rpm || val > max_rpm))
382 return -EINVAL;
383
384 /*
385 * The effective fanY_target is always a multiple of fanY_div
386 * due to the EC's internal RPM divisor (see lwmi_om_hwmon_read).
387 *
388 * Round down the written value to the nearest multiple of fanY_div
389 * to prevent mismatch between the effective value and last_target.
390 *
391 * For relax_fan_constraint, skip this conversion as setting a
392 * sub-fanY_div value is necessary to completely stop the fan on
393 * some devices.
394 */
395 if (!relax_fan_constraint)
396 raw = val / LWMI_FAN_DIV * LWMI_FAN_DIV;
397 else
398 raw = val;
399
400 err = lwmi_om_fan_get_set(priv, channel, &raw, true);
401 if (err)
402 return err;
403
404 priv->fan_info[channel].last_target = raw;
405 return 0;
406 }
407 }
408
409 return -EOPNOTSUPP;
410 }
411
412 static const struct hwmon_channel_info * const lwmi_om_hwmon_info[] = {
413 /* Must match LWMI_FAN_NR. */
414 HWMON_CHANNEL_INFO(fan,
415 HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
416 HWMON_F_MIN | HWMON_F_MAX,
417 HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
418 HWMON_F_MIN | HWMON_F_MAX,
419 HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
420 HWMON_F_MIN | HWMON_F_MAX,
421 HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
422 HWMON_F_MIN | HWMON_F_MAX),
423 NULL
424 };
425
426 static const struct hwmon_ops lwmi_om_hwmon_ops = {
427 .is_visible = lwmi_om_hwmon_is_visible,
428 .read = lwmi_om_hwmon_read,
429 .write = lwmi_om_hwmon_write,
430 };
431
432 static const struct hwmon_chip_info lwmi_om_hwmon_chip_info = {
433 .ops = &lwmi_om_hwmon_ops,
434 .info = lwmi_om_hwmon_info,
435 };
436
437 /**
438 * lwmi_om_hwmon_add() - Register HWMON device if all info is collected
439 * @priv: Driver private data
440 */
lwmi_om_hwmon_add(struct lwmi_om_priv * priv)441 static void lwmi_om_hwmon_add(struct lwmi_om_priv *priv)
442 {
443 int i, valid;
444
445 if (WARN_ON(priv->hwmon_dev))
446 return;
447
448 if (!priv->fan_flags.capdata00_collected || !priv->fan_flags.capdata_fan_collected) {
449 dev_dbg(&priv->wdev->dev, "HWMON registration pending (00: %d, fan: %d)\n",
450 priv->fan_flags.capdata00_collected,
451 priv->fan_flags.capdata_fan_collected);
452 return;
453 }
454
455 if (expose_all_fans)
456 dev_warn(&priv->wdev->dev, "all fans exposed. Use with caution\n");
457
458 if (relax_fan_constraint)
459 dev_warn(&priv->wdev->dev, "fan RPM constraint relaxed. Use with caution\n");
460
461 valid = 0;
462 for (i = 0; i < LWMI_FAN_NR; i++) {
463 if (!(priv->fan_info[i].supported & LWMI_SUPP_VALID))
464 continue;
465
466 valid++;
467
468 if (!expose_all_fans &&
469 (priv->fan_info[i].min_rpm < 0 || priv->fan_info[i].max_rpm < 0)) {
470 dev_dbg(&priv->wdev->dev, "missing RPM constraint for fan%d, hiding\n",
471 LWMI_FAN_ID(i));
472 priv->fan_info[i].supported = 0;
473 valid--;
474 }
475 }
476
477 if (valid == 0) {
478 dev_warn(&priv->wdev->dev,
479 "fan reporting/tuning is unsupported on this device\n");
480 return;
481 }
482
483 priv->hwmon_dev = hwmon_device_register_with_info(&priv->wdev->dev,
484 LWMI_OM_HWMON_NAME, priv,
485 &lwmi_om_hwmon_chip_info,
486 NULL);
487 if (IS_ERR(priv->hwmon_dev)) {
488 dev_warn(&priv->wdev->dev, "failed to register HWMON device: %ld\n",
489 PTR_ERR(priv->hwmon_dev));
490 priv->hwmon_dev = NULL;
491 return;
492 }
493
494 dev_dbg(&priv->wdev->dev, "registered HWMON device\n");
495 }
496
497 /**
498 * lwmi_om_hwmon_remove() - Unregister HWMON device
499 * @priv: Driver private data
500 *
501 * Unregisters the HWMON device if applicable.
502 */
lwmi_om_hwmon_remove(struct lwmi_om_priv * priv)503 static void lwmi_om_hwmon_remove(struct lwmi_om_priv *priv)
504 {
505 if (!priv->hwmon_dev)
506 return;
507
508 hwmon_device_unregister(priv->hwmon_dev);
509 priv->hwmon_dev = NULL;
510 }
511
512 /**
513 * lwmi_om_fan_info_init() - Initialzie fan info
514 * @priv: Driver private data
515 *
516 * lwmi_om_fan_info_collect_cd00() and lwmi_om_fan_info_collect_cd_fan() may be
517 * called in an arbitrary order. Hence, initializion must be done before.
518 */
lwmi_om_fan_info_init(struct lwmi_om_priv * priv)519 static void lwmi_om_fan_info_init(struct lwmi_om_priv *priv)
520 {
521 int i;
522
523 for (i = 0; i < LWMI_FAN_NR; i++) {
524 priv->fan_info[i] = (struct lwmi_fan_info) {
525 .supported = 0,
526 /*
527 * Assume 0 on probe as the EC resets all fans to auto mode on (re)boot.
528 *
529 * Note that S0ix (s2idle) preserves the RPM target, so we don't need
530 * suspend/resume callbacks. This behavior has not been tested on S3-
531 * capable devices, but I doubt if such devices even have this interface.
532 */
533 .last_target = 0,
534 .min_rpm = -ENODATA,
535 .max_rpm = -ENODATA,
536 };
537 }
538
539 priv->fan_flags.capdata00_collected = false;
540 priv->fan_flags.capdata_fan_collected = false;
541 }
542
543 /**
544 * lwmi_om_fan_info_collect_cd00() - Collect fan info from capdata 00
545 * @priv: Driver private data
546 */
lwmi_om_fan_info_collect_cd00(struct lwmi_om_priv * priv)547 static void lwmi_om_fan_info_collect_cd00(struct lwmi_om_priv *priv)
548 {
549 struct capdata00 capdata00;
550 int i, err;
551
552 dev_dbg(&priv->wdev->dev, "Collecting fan info from capdata00\n");
553
554 for (i = 0; i < LWMI_FAN_NR; i++) {
555 err = lwmi_cd00_get_data(priv->cd00_list, LWMI_ATTR_ID_FAN_RPM(i), &capdata00);
556 priv->fan_info[i].supported = err ? 0 : capdata00.supported;
557 }
558
559 priv->fan_flags.capdata00_collected = true;
560 lwmi_om_hwmon_add(priv);
561 }
562
563 /**
564 * lwmi_om_fan_info_collect_cd_fan() - Collect fan info from capdata fan
565 * @dev: Pointer to the lenovo-wmi-other device
566 * @cd_fan_list: Pointer to the capdata fan list
567 */
lwmi_om_fan_info_collect_cd_fan(struct device * dev,struct cd_list * cd_fan_list)568 static void lwmi_om_fan_info_collect_cd_fan(struct device *dev, struct cd_list *cd_fan_list)
569 {
570 struct lwmi_om_priv *priv = dev_get_drvdata(dev);
571 struct capdata_fan capdata_fan;
572 int i, err;
573
574 dev_dbg(dev, "Collecting fan info from capdata_fan\n");
575
576 if (!cd_fan_list)
577 goto out;
578
579 for (i = 0; i < LWMI_FAN_NR; i++) {
580 err = lwmi_cd_fan_get_data(cd_fan_list, LWMI_FAN_ID(i), &capdata_fan);
581 if (err)
582 continue;
583
584 priv->fan_info[i].min_rpm = capdata_fan.min_rpm;
585 priv->fan_info[i].max_rpm = capdata_fan.max_rpm;
586 }
587
588 out:
589 priv->fan_flags.capdata_fan_collected = true;
590 lwmi_om_hwmon_add(priv);
591 }
592
593 /* ======== Power Supply Extension (component: lenovo-wmi-capdata 00) ======== */
594
595 /**
596 * lwmi_psy_ext_get_prop() - Get a power_supply_ext property
597 * @ps: The battery that was extended
598 * @ext: The extension
599 * @ext_data: Pointer to the lwmi_om_priv drvdata
600 * @prop: The property to read
601 * @val: The value to return
602 *
603 * Reads the given value from the power_supply_ext property
604 *
605 * Return: 0 on success, or an error
606 */
lwmi_psy_ext_get_prop(struct power_supply * ps,const struct power_supply_ext * ext,void * ext_data,enum power_supply_property prop,union power_supply_propval * val)607 static int lwmi_psy_ext_get_prop(struct power_supply *ps,
608 const struct power_supply_ext *ext,
609 void *ext_data,
610 enum power_supply_property prop,
611 union power_supply_propval *val)
612 {
613 struct lwmi_om_priv *priv = ext_data;
614 struct wmi_method_args_32 args = {};
615 u32 retval;
616 int ret;
617
618 switch (prop) {
619 case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
620 /* Reading from BIOS reads the wrong bit. Use cached value */
621 val->intval = priv->charge_behaviour;
622 return 0;
623 case POWER_SUPPLY_PROP_CHARGE_TYPES:
624 args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
625 LWMI_TYPE_ID_PSU_AC);
626 break;
627 default:
628 return -EINVAL;
629 }
630
631 ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
632 (u8 *)&args, sizeof(args),
633 &retval);
634 if (ret)
635 return ret;
636
637 dev_dbg(&priv->wdev->dev, "Got return value %#x for property %#x\n", retval, prop);
638
639 switch (retval) {
640 case LWMI_CHARGE_TYPE_LONGLIFE:
641 val->intval = POWER_SUPPLY_CHARGE_TYPE_LONGLIFE;
642 break;
643 case LWMI_CHARGE_TYPE_STANDARD:
644 val->intval = POWER_SUPPLY_CHARGE_TYPE_STANDARD;
645 break;
646 default:
647 dev_err(&priv->wdev->dev, "Got invalid charge types value: %#x\n", retval);
648 return -EINVAL;
649 }
650
651 return 0;
652 }
653
654 /**
655 * lwmi_psy_ext_set_prop() - Set a power_supply_ext property
656 * @ps: The battery that was extended
657 * @ext: The extension
658 * @ext_data: Pointer to the lwmi_om_priv drvdata
659 * @prop: The property to write
660 * @val: The value to write
661 *
662 * Writes the given value to the power_supply_ext property
663 *
664 * Return: 0 on success, or an error
665 */
lwmi_psy_ext_set_prop(struct power_supply * ps,const struct power_supply_ext * ext,void * ext_data,enum power_supply_property prop,const union power_supply_propval * val)666 static int lwmi_psy_ext_set_prop(struct power_supply *ps,
667 const struct power_supply_ext *ext,
668 void *ext_data,
669 enum power_supply_property prop,
670 const union power_supply_propval *val)
671 {
672 struct lwmi_om_priv *priv = ext_data;
673 struct wmi_method_args_32 args = {};
674
675 switch (prop) {
676 case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
677 args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR,
678 LWMI_TYPE_ID_NONE);
679 switch (val->intval) {
680 case POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO:
681 args.arg1 = LWMI_CHARGE_BEHAVIOR_AUTO;
682 break;
683 case POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE:
684 args.arg1 = LWMI_CHARGE_BEHAVIOR_DISCHARGE;
685 break;
686 default:
687 dev_err(&priv->wdev->dev, "Got invalid charge behavior value: %#x\n",
688 val->intval);
689 return -EINVAL;
690 }
691 priv->charge_behaviour = val->intval;
692 break;
693 case POWER_SUPPLY_PROP_CHARGE_TYPES:
694 args.arg0 = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
695 LWMI_TYPE_ID_PSU_AC);
696 switch (val->intval) {
697 case POWER_SUPPLY_CHARGE_TYPE_LONGLIFE:
698 args.arg1 = LWMI_CHARGE_TYPE_LONGLIFE;
699 break;
700 case POWER_SUPPLY_CHARGE_TYPE_STANDARD:
701 args.arg1 = LWMI_CHARGE_TYPE_STANDARD;
702 break;
703 default:
704 dev_err(&priv->wdev->dev, "Got invalid charge types value: %#x\n",
705 val->intval);
706 return -EINVAL;
707 }
708 break;
709 default:
710 return -EINVAL;
711 }
712
713 dev_dbg(&priv->wdev->dev, "Attempting to set %#010x for property %#x to %#x\n",
714 args.arg0, prop, args.arg1);
715
716 return lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
717 (u8 *)&args, sizeof(args), NULL);
718 }
719
720 /** lwmi_psy_prop_get_supported() - Gets the support level from capdata for a given property
721 * @priv: Pointer to the lwmi_om_priv drvdata
722 * @prop: The power supply property to be evaluated
723 *
724 * Return: bitmapped capability data support level
725 */
lwmi_psy_prop_get_supported(struct lwmi_om_priv * priv,enum power_supply_property prop)726 static u32 lwmi_psy_prop_get_supported(struct lwmi_om_priv *priv, enum power_supply_property prop)
727 {
728 struct capdata00 capdata;
729 u32 attribute_id;
730 int ret;
731
732 switch (prop) {
733 case POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR:
734 attribute_id = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_BEHAVIOUR,
735 LWMI_TYPE_ID_NONE);
736 break;
737 case POWER_SUPPLY_PROP_CHARGE_TYPES:
738 attribute_id = LWMI_ATTR_ID_PSU(LWMI_FEATURE_ID_PSU_CHARGE_TYPES,
739 LWMI_TYPE_ID_PSU_AC);
740 break;
741 default:
742 return 0;
743 }
744
745 ret = lwmi_cd00_get_data(priv->cd00_list, attribute_id, &capdata);
746 if (ret)
747 return 0;
748
749 dev_dbg(&priv->wdev->dev, "Battery charge feature (%#010x) support level: %#x\n",
750 attribute_id, capdata.supported);
751
752 return capdata.supported;
753 }
754
755 /**
756 * lwmi_psy_prop_is_supported() - Determine if the property is supported
757 * @priv: Pointer to the lwmi_om_priv drvdata
758 * @prop: The power supply property to be evaluated
759 *
760 * Checks capdata 00 to determine if the property is supported.
761 *
762 * Return: true if readable, or false
763 */
lwmi_psy_prop_is_supported(struct lwmi_om_priv * priv,enum power_supply_property prop)764 static bool lwmi_psy_prop_is_supported(struct lwmi_om_priv *priv, enum power_supply_property prop)
765 {
766 int ret;
767
768 if (force_load_psy_ext)
769 return true;
770
771 ret = lwmi_psy_prop_get_supported(priv, prop);
772 if (ret < 0)
773 return false;
774
775 return (ret & LWMI_SUPP_VALID) && (ret & LWMI_SUPP_GET);
776 }
777
778 /**
779 * lwmi_psy_prop_is_writeable() - Determine if the property is writeable
780 * @ps: The battery that was extended
781 * @ext: The extension
782 * @ext_data: Pointer the lwmi_om_priv drvdata
783 * @prop: The property to check
784 *
785 * Checks capdata 00 to determine if the property is writable.
786 *
787 * Return: true if writable, or false
788 */
lwmi_psy_prop_is_writeable(struct power_supply * ps,const struct power_supply_ext * ext,void * ext_data,enum power_supply_property prop)789 static int lwmi_psy_prop_is_writeable(struct power_supply *ps,
790 const struct power_supply_ext *ext,
791 void *ext_data,
792 enum power_supply_property prop)
793 {
794 struct lwmi_om_priv *priv = ext_data;
795 int ret;
796
797 if (force_load_psy_ext)
798 return true;
799
800 ret = lwmi_psy_prop_get_supported(priv, prop);
801 if (ret < 0)
802 return false;
803
804 return !!(ret & LWMI_SUPP_SET);
805 }
806
807 #define DEFINE_LWMI_POWER_SUPPLY_EXTENSION(_name, _props, _behaviours, _types) \
808 static const struct power_supply_ext _name = { \
809 .name = LWMI_OM_SYSFS_NAME, \
810 .properties = _props, \
811 .num_properties = ARRAY_SIZE(_props), \
812 .charge_behaviours = _behaviours, \
813 .charge_types = _types, \
814 .get_property = lwmi_psy_ext_get_prop, \
815 .set_property = lwmi_psy_ext_set_prop, \
816 .property_is_writeable = lwmi_psy_prop_is_writeable, \
817 }
818
819 static const enum power_supply_property lwmi_psy_ext_props_all[] = {
820 POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
821 POWER_SUPPLY_PROP_CHARGE_TYPES,
822 };
823
824 static const enum power_supply_property lwmi_psy_ext_props_types[] = {
825 POWER_SUPPLY_PROP_CHARGE_TYPES,
826 };
827
828 static const enum power_supply_property lwmi_psy_ext_props_behaviour[] = {
829 POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR,
830 };
831
832 #define LWMI_CHARGE_BEHAVIOURS (BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_AUTO) | \
833 BIT(POWER_SUPPLY_CHARGE_BEHAVIOUR_FORCE_DISCHARGE))
834
835 #define LWMI_CHARGE_TYPES (BIT(POWER_SUPPLY_CHARGE_TYPE_STANDARD) | \
836 BIT(POWER_SUPPLY_CHARGE_TYPE_LONGLIFE))
837
838 DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_all, lwmi_psy_ext_props_all,
839 LWMI_CHARGE_BEHAVIOURS, LWMI_CHARGE_TYPES);
840 DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_types, lwmi_psy_ext_props_types,
841 0, LWMI_CHARGE_TYPES);
842 DEFINE_LWMI_POWER_SUPPLY_EXTENSION(lwmi_psy_ext_behaviour, lwmi_psy_ext_props_behaviour,
843 LWMI_CHARGE_BEHAVIOURS, 0);
844
845 #define LWMI_PSY_PROP_BEHAVIOUR BIT(0)
846 #define LWMI_PSY_PROP_TYPES BIT(1)
847
848 static const struct power_supply_ext *lwmi_psy_exts[] = {
849 [LWMI_PSY_PROP_BEHAVIOUR] = &lwmi_psy_ext_behaviour,
850 [LWMI_PSY_PROP_TYPES] = &lwmi_psy_ext_types,
851 [LWMI_PSY_PROP_BEHAVIOUR | LWMI_PSY_PROP_TYPES] = &lwmi_psy_ext_all,
852 };
853
854 /**
855 * lwmi_add_battery() - Connect the power_supply_ext
856 * @battery: The battery to extend
857 * @hook: The driver hook used to extend the battery
858 *
859 * Return: 0 on success, or an error.
860 */
lwmi_add_battery(struct power_supply * battery,struct acpi_battery_hook * hook)861 static int lwmi_add_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
862 {
863 struct lwmi_om_priv *priv = container_of(hook, struct lwmi_om_priv, battery_hook);
864
865 return power_supply_register_extension(battery, priv->battery_ext, &priv->wdev->dev, priv);
866 }
867
868 /**
869 * lwmi_remove_battery() - Disconnect the power_supply_ext
870 * @battery: The battery that was extended
871 * @hook: The driver hook used to extend the battery
872 *
873 * Return: 0 on success, or an error.
874 */
lwmi_remove_battery(struct power_supply * battery,struct acpi_battery_hook * hook)875 static int lwmi_remove_battery(struct power_supply *battery, struct acpi_battery_hook *hook)
876 {
877 struct lwmi_om_priv *priv = container_of(hook, struct lwmi_om_priv, battery_hook);
878
879 power_supply_unregister_extension(battery, priv->battery_ext);
880 return 0;
881 }
882
883 /**
884 * lwmi_acpi_match() - Attempts to return the ideapad acpi handle
885 * @handle: The ACPI handle that manages battery charging
886 * @lvl: Unused
887 * @context: Void pointer to the acpi_handle object to return
888 * @retval: Unused
889 *
890 * Checks if the ideapad_laptop driver is going to manage charge_type first,
891 * then if not, hooks the battery to our WMI methods.
892 *
893 * Return: AE_CTRL_TERMINATE if found, AE_OK if not found.
894 */
lwmi_acpi_match(acpi_handle handle,u32 lvl,void * context,void ** retval)895 static acpi_status lwmi_acpi_match(acpi_handle handle, u32 lvl,
896 void *context, void **retval)
897 {
898 acpi_handle *ahand = context;
899
900 if (!handle)
901 return AE_OK;
902
903 *ahand = handle;
904
905 return AE_CTRL_TERMINATE;
906 }
907
908 /**
909 * lwmi_om_psy_ext_init() - Hooks power supply extension to device battery
910 * @priv: Pointer to the lwmi_om_priv drvdata.
911 *
912 * Checks if the ideapad_laptop driver is going to manage charge attributes first,
913 * then if not, hooks the battery to our WMI methods if they are supported.
914 */
lwmi_om_psy_ext_init(struct lwmi_om_priv * priv)915 static void lwmi_om_psy_ext_init(struct lwmi_om_priv *priv)
916 {
917 static const char * const ideapad_hid = "VPC2004";
918 acpi_handle handle = NULL;
919 unsigned int props = 0;
920 int ret;
921
922 if (lwmi_psy_prop_is_supported(priv, POWER_SUPPLY_PROP_CHARGE_BEHAVIOUR))
923 props |= LWMI_PSY_PROP_BEHAVIOUR;
924 if (lwmi_psy_prop_is_supported(priv, POWER_SUPPLY_PROP_CHARGE_TYPES))
925 props |= LWMI_PSY_PROP_TYPES;
926 if (!props)
927 return;
928 if (force_load_psy_ext)
929 goto load_psy_ext;
930
931 /* Deconflict ideapad_laptop driver */
932 ret = acpi_get_devices(ideapad_hid, lwmi_acpi_match, &handle, NULL);
933 if (ret)
934 return;
935
936 if (handle && acpi_has_method(handle, "GBMD") && acpi_has_method(handle, "SBMC")) {
937 dev_dbg(&priv->wdev->dev, "ideapad_laptop driver manages battery for device\n");
938 return;
939 }
940
941 load_psy_ext:
942 /* Add battery hooks */
943 priv->battery_ext = lwmi_psy_exts[props];
944 priv->battery_hook.add_battery = lwmi_add_battery;
945 priv->battery_hook.remove_battery = lwmi_remove_battery;
946 priv->battery_hook.name = "Lenovo WMI Other Battery Extension";
947 priv->bh_registered = true;
948
949 battery_hook_register(&priv->battery_hook);
950 }
951
952 /**
953 * lwmi_om_psy_remove() - Unregister battery hook
954 * @priv: Driver private data
955 *
956 * Unregisters the battery hook if applicable.
957 */
lwmi_om_psy_remove(struct lwmi_om_priv * priv)958 static void lwmi_om_psy_remove(struct lwmi_om_priv *priv)
959 {
960 if (!priv->bh_registered)
961 return;
962
963 battery_hook_unregister(&priv->battery_hook);
964 priv->bh_registered = false;
965 }
966
967 /* ======== fw_attributes (component: lenovo-wmi-capdata 01) ======== */
968
969 struct tunable_attr_01 {
970 struct device *dev;
971 u8 feature_id;
972 u8 device_id;
973 u8 type_id;
974 u8 cd_mode_id; /* mode arg for searching capdata */
975 u8 cv_mode_id; /* mode arg for set/get current_value */
976 };
977
978 /**
979 * tunable_attr_01_id() - Formats a tunable_attr_01 to a capdata attribute ID
980 * @attr: The tunable_attr_01 to format.
981 * @mode: The u8 corresponding to the wmi-gamezone mode for set/get.
982 *
983 * Return: encoded capability data attribute ID.
984 */
tunable_attr_01_id(struct tunable_attr_01 * attr,u8 mode)985 static u32 tunable_attr_01_id(struct tunable_attr_01 *attr, u8 mode)
986 {
987 return lwmi_attr_id(attr->device_id, attr->feature_id, mode, attr->type_id);
988 }
989
990 static struct tunable_attr_01 ppt_pl1_spl = {
991 .device_id = LWMI_DEVICE_ID_CPU,
992 .feature_id = LWMI_FEATURE_ID_CPU_SPL,
993 .type_id = LWMI_TYPE_ID_NONE,
994 };
995
996 static struct tunable_attr_01 ppt_pl1_spl_cl = {
997 .device_id = LWMI_DEVICE_ID_CPU,
998 .feature_id = LWMI_FEATURE_ID_CPU_SPL,
999 .type_id = LWMI_TYPE_ID_CROSSLOAD,
1000 };
1001
1002 static struct tunable_attr_01 ppt_pl2_sppt = {
1003 .device_id = LWMI_DEVICE_ID_CPU,
1004 .feature_id = LWMI_FEATURE_ID_CPU_SPPT,
1005 .type_id = LWMI_TYPE_ID_NONE,
1006 };
1007
1008 static struct tunable_attr_01 ppt_pl2_sppt_cl = {
1009 .device_id = LWMI_DEVICE_ID_CPU,
1010 .feature_id = LWMI_FEATURE_ID_CPU_SPPT,
1011 .type_id = LWMI_TYPE_ID_CROSSLOAD,
1012 };
1013
1014 static struct tunable_attr_01 ppt_pl3_fppt = {
1015 .device_id = LWMI_DEVICE_ID_CPU,
1016 .feature_id = LWMI_FEATURE_ID_CPU_FPPT,
1017 .type_id = LWMI_TYPE_ID_NONE,
1018 };
1019
1020 static struct tunable_attr_01 ppt_pl3_fppt_cl = {
1021 .device_id = LWMI_DEVICE_ID_CPU,
1022 .feature_id = LWMI_FEATURE_ID_CPU_FPPT,
1023 .type_id = LWMI_TYPE_ID_CROSSLOAD,
1024 };
1025
1026 static struct tunable_attr_01 cpu_temp = {
1027 .device_id = LWMI_DEVICE_ID_CPU,
1028 .feature_id = LWMI_FEATURE_ID_CPU_TEMP,
1029 .type_id = LWMI_TYPE_ID_NONE,
1030 };
1031
1032 static struct tunable_attr_01 ppt_pl1_apu_spl = {
1033 .device_id = LWMI_DEVICE_ID_CPU,
1034 .feature_id = LWMI_FEATURE_ID_CPU_APU,
1035 .type_id = LWMI_TYPE_ID_NONE,
1036 };
1037
1038 static struct tunable_attr_01 ppt_cpu_cl = {
1039 .device_id = LWMI_DEVICE_ID_CPU,
1040 .feature_id = LWMI_FEATURE_ID_CPU_CL,
1041 .type_id = LWMI_TYPE_ID_NONE,
1042 };
1043
1044 static struct tunable_attr_01 ppt_pl1_tau = {
1045 .device_id = LWMI_DEVICE_ID_CPU,
1046 .feature_id = LWMI_FEATURE_ID_CPU_TAU,
1047 .type_id = LWMI_TYPE_ID_NONE,
1048 };
1049
1050 static struct tunable_attr_01 ppt_pl4_ipl = {
1051 .device_id = LWMI_DEVICE_ID_CPU,
1052 .feature_id = LWMI_FEATURE_ID_CPU_IPL,
1053 .type_id = LWMI_TYPE_ID_NONE,
1054 };
1055
1056 static struct tunable_attr_01 ppt_pl4_ipl_cl = {
1057 .device_id = LWMI_DEVICE_ID_CPU,
1058 .feature_id = LWMI_FEATURE_ID_CPU_IPL,
1059 .type_id = LWMI_TYPE_ID_CROSSLOAD,
1060 };
1061
1062 static struct tunable_attr_01 gpu_nv_ppab = {
1063 .device_id = LWMI_DEVICE_ID_GPU,
1064 .feature_id = LWMI_FEATURE_ID_GPU_NV_PPAB,
1065 .type_id = LWMI_TYPE_ID_NONE,
1066 };
1067
1068 static struct tunable_attr_01 gpu_nv_ctgp = {
1069 .device_id = LWMI_DEVICE_ID_GPU,
1070 .feature_id = LWMI_FEATURE_ID_GPU_NV_CTGP,
1071 .type_id = LWMI_TYPE_ID_NONE,
1072 };
1073
1074 static struct tunable_attr_01 gpu_temp = {
1075 .device_id = LWMI_DEVICE_ID_GPU,
1076 .feature_id = LWMI_FEATURE_ID_GPU_TEMP,
1077 .type_id = LWMI_TYPE_ID_NONE,
1078 };
1079
1080 static struct tunable_attr_01 gpu_nv_ac_offset = {
1081 .device_id = LWMI_DEVICE_ID_GPU,
1082 .feature_id = LWMI_FEATURE_ID_GPU_AC_OFFSET,
1083 .type_id = LWMI_TYPE_ID_NONE,
1084 };
1085
1086 static struct tunable_attr_01 dgpu_boost_clk = {
1087 .device_id = LWMI_DEVICE_ID_GPU,
1088 .feature_id = LWMI_FEATURE_ID_DGPU_BOOST_CLK,
1089 .type_id = LWMI_TYPE_ID_NONE,
1090 };
1091
1092 static struct tunable_attr_01 dgpu_enable = {
1093 .device_id = LWMI_DEVICE_ID_GPU,
1094 .feature_id = LWMI_FEATURE_ID_DGPU_EN,
1095 .type_id = LWMI_TYPE_ID_NONE,
1096 };
1097
1098 static struct tunable_attr_01 gpu_mode = {
1099 .device_id = LWMI_DEVICE_ID_GPU,
1100 .feature_id = LWMI_FEATURE_ID_GPU_MODE,
1101 .type_id = LWMI_TYPE_ID_NONE,
1102 };
1103
1104 static struct tunable_attr_01 dgpu_didvid = {
1105 .device_id = LWMI_DEVICE_ID_GPU,
1106 .feature_id = LWMI_FEATURE_ID_DGPU_DIDVID,
1107 .type_id = LWMI_TYPE_ID_NONE,
1108 };
1109
1110 static struct tunable_attr_01 gpu_nv_bpl = {
1111 .device_id = LWMI_DEVICE_ID_GPU,
1112 .feature_id = LWMI_FEATURE_ID_GPU_NV_BPL,
1113 .type_id = LWMI_TYPE_ID_NONE,
1114 };
1115
1116 static struct tunable_attr_01 gpu_nv_cpu_boost = {
1117 .device_id = LWMI_DEVICE_ID_GPU,
1118 .feature_id = LWMI_FEATURE_ID_GPU_NV_CPU_BOOST,
1119 .type_id = LWMI_TYPE_ID_NONE,
1120 };
1121
1122 struct capdata01_attr_group {
1123 const struct attribute_group *attr_group;
1124 struct tunable_attr_01 *tunable_attr;
1125 };
1126
1127 /* Attribute Methods */
1128
1129 /**
1130 * int_type_show() - Emit the data type for an integer attribute
1131 * @kobj: Pointer to the driver object.
1132 * @kattr: Pointer to the attribute calling this function.
1133 * @buf: The buffer to write to.
1134 *
1135 * Return: Number of characters written to buf.
1136 */
int_type_show(struct kobject * kobj,struct kobj_attribute * kattr,char * buf)1137 static ssize_t int_type_show(struct kobject *kobj, struct kobj_attribute *kattr,
1138 char *buf)
1139 {
1140 return sysfs_emit(buf, "integer\n");
1141 }
1142
1143 /**
1144 * attr_capdata01_show() - Get the value of the specified attribute property
1145 *
1146 * @kobj: Pointer to the driver object.
1147 * @kattr: Pointer to the attribute calling this function.
1148 * @buf: The buffer to write to.
1149 * @tunable_attr: The attribute to be read.
1150 * @prop: The property of this attribute to be read.
1151 *
1152 * Retrieves the given property from the capability data 01 struct for the
1153 * specified attribute's "custom" thermal mode. This function is intended
1154 * to be generic so it can be called from any integer attributes "_show"
1155 * function.
1156 *
1157 * If the WMI is success the sysfs attribute is notified.
1158 *
1159 * Return: Either number of characters written to buf, or an error code.
1160 */
attr_capdata01_show(struct kobject * kobj,struct kobj_attribute * kattr,char * buf,struct tunable_attr_01 * tunable_attr,enum attribute_property prop)1161 static ssize_t attr_capdata01_show(struct kobject *kobj,
1162 struct kobj_attribute *kattr, char *buf,
1163 struct tunable_attr_01 *tunable_attr,
1164 enum attribute_property prop)
1165 {
1166 struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
1167 struct capdata01 capdata;
1168 u32 attribute_id;
1169 int value, ret;
1170
1171 attribute_id = tunable_attr_01_id(tunable_attr, tunable_attr->cd_mode_id);
1172
1173 ret = lwmi_cd01_get_data(priv->cd01_list, attribute_id, &capdata);
1174 if (ret)
1175 return ret;
1176
1177 switch (prop) {
1178 case DEFAULT_VAL:
1179 value = capdata.default_value;
1180 break;
1181 case MAX_VAL:
1182 value = capdata.max_value;
1183 break;
1184 case MIN_VAL:
1185 value = capdata.min_value;
1186 break;
1187 case STEP_VAL:
1188 value = capdata.step;
1189 break;
1190 default:
1191 return -EINVAL;
1192 }
1193
1194 return sysfs_emit(buf, "%d\n", value);
1195 }
1196
1197 /**
1198 * attr_current_value_store() - Set the current value of the given attribute
1199 * @kobj: Pointer to the driver object.
1200 * @kattr: Pointer to the attribute calling this function.
1201 * @buf: The buffer to read from, this is parsed to `int` type.
1202 * @count: Required by sysfs attribute macros, pass in from the callee attr.
1203 * @tunable_attr: The attribute to be stored.
1204 *
1205 * Sets the value of the given attribute when operating under the "custom"
1206 * smartfan profile. The current smartfan profile is retrieved from the
1207 * lenovo-wmi-gamezone driver and error is returned if the result is not
1208 * "custom". This function is intended to be generic so it can be called from
1209 * any integer attribute's "_store" function. The integer to be sent to the WMI
1210 * method is range checked and an error code is returned if out of range.
1211 *
1212 * If the value is valid and WMI is success, then the sysfs attribute is
1213 * notified.
1214 *
1215 * Return: Either count, or an error code.
1216 */
attr_current_value_store(struct kobject * kobj,struct kobj_attribute * kattr,const char * buf,size_t count,struct tunable_attr_01 * tunable_attr)1217 static ssize_t attr_current_value_store(struct kobject *kobj,
1218 struct kobj_attribute *kattr,
1219 const char *buf, size_t count,
1220 struct tunable_attr_01 *tunable_attr)
1221 {
1222 struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
1223 struct wmi_method_args_32 args = {};
1224 struct capdata01 capdata;
1225 enum thermal_mode mode;
1226 u32 value;
1227 int ret;
1228
1229 ret = lwmi_tm_notifier_call(&mode);
1230 if (ret)
1231 return ret;
1232
1233 if (mode != LWMI_GZ_THERMAL_MODE_CUSTOM)
1234 return -EBUSY;
1235
1236 args.arg0 = tunable_attr_01_id(tunable_attr, tunable_attr->cd_mode_id);
1237
1238 ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
1239 if (ret)
1240 return ret;
1241
1242 ret = kstrtouint(buf, 10, &value);
1243 if (ret)
1244 return ret;
1245
1246 if (value < capdata.min_value || value > capdata.max_value)
1247 return -EINVAL;
1248
1249 args.arg0 = tunable_attr_01_id(tunable_attr, tunable_attr->cv_mode_id);
1250 args.arg1 = value;
1251
1252 ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_SET,
1253 (unsigned char *)&args, sizeof(args), NULL);
1254 if (ret)
1255 return ret;
1256
1257 return count;
1258 };
1259
1260 /**
1261 * attr_current_value_show() - Get the current value of the given attribute
1262 * @kobj: Pointer to the driver object.
1263 * @kattr: Pointer to the attribute calling this function.
1264 * @buf: The buffer to write to.
1265 * @tunable_attr: The attribute to be read.
1266 *
1267 * Retrieves the value of the given attribute for the current smartfan profile.
1268 * The current smartfan profile is retrieved from the lenovo-wmi-gamezone driver.
1269 * This function is intended to be generic so it can be called from any integer
1270 * attribute's "_show" function.
1271 *
1272 * If the WMI is success the sysfs attribute is notified.
1273 *
1274 * Return: Either number of characters written to buf, or an error code.
1275 */
attr_current_value_show(struct kobject * kobj,struct kobj_attribute * kattr,char * buf,struct tunable_attr_01 * tunable_attr)1276 static ssize_t attr_current_value_show(struct kobject *kobj,
1277 struct kobj_attribute *kattr, char *buf,
1278 struct tunable_attr_01 *tunable_attr)
1279 {
1280 struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
1281 struct wmi_method_args_32 args = {};
1282 enum thermal_mode mode;
1283 int retval;
1284 int ret;
1285
1286 ret = lwmi_tm_notifier_call(&mode);
1287 if (ret)
1288 return ret;
1289
1290 /* If "no-mode" is the supported mode, ensure we never send current mode */
1291 if (tunable_attr->cv_mode_id == LWMI_GZ_THERMAL_MODE_NONE)
1292 mode = tunable_attr->cv_mode_id;
1293
1294 args.arg0 = tunable_attr_01_id(tunable_attr, mode);
1295
1296 ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
1297 (unsigned char *)&args, sizeof(args),
1298 &retval);
1299 if (ret)
1300 return ret;
1301
1302 return sysfs_emit(buf, "%d\n", retval);
1303 }
1304
1305 /**
1306 * lwmi_attr_01_is_supported() - Determine if the given attribute is supported.
1307 * @tunable_attr: The attribute to verify.
1308 *
1309 * For an attribute to be supported it must have a functional get/set method,
1310 * as well as associated capability data stored in the capdata01 table.
1311 *
1312 * First check if the attribute has a corresponding data table under custom mode
1313 * (0xff), then under no mode (0x00). If either of those passes, check if the
1314 * supported field of the capdata struct is > 0. If it is supported, store the
1315 * successful mode in the cd_mode_id field of tunable_attr.
1316 *
1317 * If the attribute capdata shows it is supported, attempt to determine the mode
1318 * for the current value property get/set methods using a similar pattern to the
1319 * capdata table check. If the value returned by either mode is 0 or an error,
1320 * assume that mode is not supported. Otherwise, store the successful mode in the
1321 * cv_mode_id field of tunable_attr.
1322 *
1323 * If any of the above checks fail then the attribute is not fully supported.
1324 *
1325 * Return: true if capdata and set/get modes are found, otherwise false.
1326 */
lwmi_attr_01_is_supported(struct tunable_attr_01 * tunable_attr)1327 static bool lwmi_attr_01_is_supported(struct tunable_attr_01 *tunable_attr)
1328 {
1329 u8 modes[2] = { LWMI_GZ_THERMAL_MODE_CUSTOM, LWMI_GZ_THERMAL_MODE_NONE };
1330 struct lwmi_om_priv *priv = dev_get_drvdata(tunable_attr->dev);
1331 struct wmi_method_args_32 args = {};
1332 bool cd_mode_found = false;
1333 bool cv_mode_found = false;
1334 struct capdata01 capdata;
1335 int retval, ret, i;
1336
1337 /* Determine tunable_attr->cd_mode_id */
1338 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1339 args.arg0 = tunable_attr_01_id(tunable_attr, modes[i]);
1340
1341 ret = lwmi_cd01_get_data(priv->cd01_list, args.arg0, &capdata);
1342 if (ret || !capdata.supported)
1343 continue;
1344
1345 tunable_attr->cd_mode_id = modes[i];
1346 cd_mode_found = true;
1347 break;
1348 }
1349
1350 if (!cd_mode_found)
1351 return cd_mode_found;
1352
1353 dev_dbg(tunable_attr->dev,
1354 "cd_mode_id: %#010x\n", args.arg0);
1355
1356 /* Determine tunable_attr->cv_mode_id, returns 1 if supported */
1357 for (i = 0; i < ARRAY_SIZE(modes); i++) {
1358 args.arg0 = tunable_attr_01_id(tunable_attr, modes[i]);
1359
1360 ret = lwmi_dev_evaluate_int(priv->wdev, 0x0, LWMI_FEATURE_VALUE_GET,
1361 (u8 *)&args, sizeof(args),
1362 &retval);
1363 if (ret || !retval)
1364 continue;
1365
1366 tunable_attr->cv_mode_id = modes[i];
1367 cv_mode_found = true;
1368 break;
1369 }
1370
1371 if (!cv_mode_found)
1372 return cv_mode_found;
1373
1374 dev_dbg(tunable_attr->dev, "cv_mode_id: %#010x, attribute support level: %#010x\n",
1375 args.arg0, capdata.supported);
1376
1377 return capdata.supported > 0;
1378 }
1379
1380 /* Lenovo WMI Other Mode Attribute macros */
1381 #define __LWMI_ATTR_RO(_func, _name) \
1382 { \
1383 .attr = { .name = __stringify(_name), .mode = 0444 }, \
1384 .show = _func##_##_name##_show, \
1385 }
1386
1387 #define __LWMI_ATTR_RO_AS(_name, _show) \
1388 { \
1389 .attr = { .name = __stringify(_name), .mode = 0444 }, \
1390 .show = _show, \
1391 }
1392
1393 #define __LWMI_ATTR_RW(_func, _name) \
1394 __ATTR(_name, 0644, _func##_##_name##_show, _func##_##_name##_store)
1395
1396 /* Shows a formatted static variable */
1397 #define __LWMI_ATTR_SHOW_FMT(_prop, _attrname, _fmt, _val) \
1398 static ssize_t _attrname##_##_prop##_show( \
1399 struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
1400 { \
1401 return sysfs_emit(buf, _fmt, _val); \
1402 } \
1403 static struct kobj_attribute attr_##_attrname##_##_prop = \
1404 __LWMI_ATTR_RO(_attrname, _prop)
1405
1406 /* Attribute current value read/write */
1407 #define __LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname) \
1408 static ssize_t _attrname##_current_value_store( \
1409 struct kobject *kobj, struct kobj_attribute *kattr, \
1410 const char *buf, size_t count) \
1411 { \
1412 return attr_current_value_store(kobj, kattr, buf, count, \
1413 &_attrname); \
1414 } \
1415 static ssize_t _attrname##_current_value_show( \
1416 struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
1417 { \
1418 return attr_current_value_show(kobj, kattr, buf, &_attrname); \
1419 } \
1420 static struct kobj_attribute attr_##_attrname##_current_value = \
1421 __LWMI_ATTR_RW(_attrname, current_value)
1422
1423 /* Attribute property read only */
1424 #define __LWMI_TUNABLE_RO_CAP01(_prop, _attrname, _prop_type) \
1425 static ssize_t _attrname##_##_prop##_show( \
1426 struct kobject *kobj, struct kobj_attribute *kattr, char *buf) \
1427 { \
1428 return attr_capdata01_show(kobj, kattr, buf, &_attrname, \
1429 _prop_type); \
1430 } \
1431 static struct kobj_attribute attr_##_attrname##_##_prop = \
1432 __LWMI_ATTR_RO(_attrname, _prop)
1433
1434 #define LWMI_ATTR_GROUP_TUNABLE_CAP01(_attrname, _fsname, _dispname) \
1435 __LWMI_TUNABLE_CURRENT_VALUE_CAP01(_attrname); \
1436 __LWMI_TUNABLE_RO_CAP01(default_value, _attrname, DEFAULT_VAL); \
1437 __LWMI_ATTR_SHOW_FMT(display_name, _attrname, "%s\n", _dispname); \
1438 __LWMI_TUNABLE_RO_CAP01(max_value, _attrname, MAX_VAL); \
1439 __LWMI_TUNABLE_RO_CAP01(min_value, _attrname, MIN_VAL); \
1440 __LWMI_TUNABLE_RO_CAP01(scalar_increment, _attrname, STEP_VAL); \
1441 static struct kobj_attribute attr_##_attrname##_type = \
1442 __LWMI_ATTR_RO_AS(type, int_type_show); \
1443 static struct attribute *_attrname##_attrs[] = { \
1444 &attr_##_attrname##_current_value.attr, \
1445 &attr_##_attrname##_default_value.attr, \
1446 &attr_##_attrname##_display_name.attr, \
1447 &attr_##_attrname##_max_value.attr, \
1448 &attr_##_attrname##_min_value.attr, \
1449 &attr_##_attrname##_scalar_increment.attr, \
1450 &attr_##_attrname##_type.attr, \
1451 NULL, \
1452 }; \
1453 static const struct attribute_group _attrname##_attr_group = { \
1454 .name = _fsname, .attrs = _attrname##_attrs \
1455 }
1456
1457 /* CPU tunable attributes */
1458 LWMI_ATTR_GROUP_TUNABLE_CAP01(cpu_temp, "cpu_temp",
1459 "Set the CPU thermal load limit");
1460 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_cpu_cl, "ppt_cpu_cl",
1461 "Set the CPU cross loading power limit");
1462 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_apu_spl, "ppt_pl1_apu_spl",
1463 "Set the APU sustained power limit");
1464 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl, "ppt_pl1_spl",
1465 "Set the CPU sustained power limit");
1466 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_spl_cl, "ppt_pl1_spl_cl",
1467 "Set the CPU cross loading sustained power limit");
1468 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt, "ppt_pl2_sppt",
1469 "Set the CPU slow package power tracking limit");
1470 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl2_sppt_cl, "ppt_pl2_sppt_cl",
1471 "Set the CPU cross loading slow package power tracking limit");
1472 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt, "ppt_pl3_fppt",
1473 "Set the CPU fast package power tracking limit");
1474 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl3_fppt_cl, "ppt_pl3_fppt_cl",
1475 "Set the CPU cross loading fast package power tracking limit");
1476 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl1_tau, "ppt_pl1_tau",
1477 "Set the CPU sustained power limit exceed duration");
1478 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl, "ppt_pl4_ipl",
1479 "Set the CPU instantaneous power limit");
1480 LWMI_ATTR_GROUP_TUNABLE_CAP01(ppt_pl4_ipl_cl, "ppt_pl4_ipl_cl",
1481 "Set the CPU cross loading instantaneous power limit");
1482
1483 /* GPU tunable attributes */
1484 LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_boost_clk, "dgpu_boost_clk",
1485 "Set the dedicated GPU boost clock");
1486 LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_didvid, "dgpu_didvid",
1487 "Get the GPU device identifier and vendor identifier");
1488 LWMI_ATTR_GROUP_TUNABLE_CAP01(dgpu_enable, "dgpu_enable",
1489 "Set the dedicated Nvidia GPU enabled status");
1490 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_mode, "gpu_mode",
1491 "Set the GPU mode by power limit");
1492 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ac_offset, "gpu_nv_ac_offset",
1493 "Set the Nvidia GPU AC total processing power baseline offset");
1494 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_bpl, "gpu_nv_bpl",
1495 "Set the Nvidia GPU base power limit");
1496 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_cpu_boost, "gpu_nv_cpu_boost",
1497 "Set the Nvidia GPU to CPU dynamic boost limit");
1498 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ctgp, "gpu_nv_ctgp",
1499 "Set the GPU configurable total graphics power");
1500 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_nv_ppab, "gpu_nv_ppab",
1501 "Set the Nvidia GPU power performance aware boost limit");
1502 LWMI_ATTR_GROUP_TUNABLE_CAP01(gpu_temp, "gpu_temp",
1503 "Set the GPU thermal load limit");
1504
1505 static struct capdata01_attr_group cd01_attr_groups[] = {
1506 { &cpu_temp_attr_group, &cpu_temp },
1507 { &dgpu_boost_clk_attr_group, &dgpu_boost_clk },
1508 { &dgpu_didvid_attr_group, &dgpu_didvid },
1509 { &dgpu_enable_attr_group, &dgpu_enable },
1510 { &gpu_mode_attr_group, &gpu_mode },
1511 { &gpu_nv_ac_offset_attr_group, &gpu_nv_ac_offset },
1512 { &gpu_nv_bpl_attr_group, &gpu_nv_bpl },
1513 { &gpu_nv_cpu_boost_attr_group, &gpu_nv_cpu_boost },
1514 { &gpu_nv_ctgp_attr_group, &gpu_nv_ctgp },
1515 { &gpu_nv_ppab_attr_group, &gpu_nv_ppab },
1516 { &gpu_temp_attr_group, &gpu_temp },
1517 { &ppt_cpu_cl_attr_group, &ppt_cpu_cl },
1518 { &ppt_pl1_apu_spl_attr_group, &ppt_pl1_apu_spl },
1519 { &ppt_pl1_spl_attr_group, &ppt_pl1_spl },
1520 { &ppt_pl1_spl_cl_attr_group, &ppt_pl1_spl_cl },
1521 { &ppt_pl1_tau_attr_group, &ppt_pl1_tau },
1522 { &ppt_pl2_sppt_attr_group, &ppt_pl2_sppt },
1523 { &ppt_pl2_sppt_cl_attr_group, &ppt_pl2_sppt_cl },
1524 { &ppt_pl3_fppt_attr_group, &ppt_pl3_fppt },
1525 { &ppt_pl3_fppt_cl_attr_group, &ppt_pl3_fppt_cl },
1526 { &ppt_pl4_ipl_attr_group, &ppt_pl4_ipl },
1527 { &ppt_pl4_ipl_cl_attr_group, &ppt_pl4_ipl_cl },
1528 {},
1529 };
1530
1531 /**
1532 * lwmi_om_fw_attr_add() - Register all firmware_attributes_class members
1533 * @priv: The Other Mode driver data.
1534 */
lwmi_om_fw_attr_add(struct lwmi_om_priv * priv)1535 static void lwmi_om_fw_attr_add(struct lwmi_om_priv *priv)
1536 {
1537 unsigned int i;
1538 int err;
1539
1540 err = ida_alloc(&lwmi_om_ida, GFP_KERNEL);
1541 if (err < 0)
1542 goto err_no_ida;
1543
1544 priv->ida_id = err;
1545
1546 priv->fw_attr_dev = device_create(&firmware_attributes_class, NULL,
1547 MKDEV(0, 0), NULL, "%s-%u",
1548 LWMI_OM_SYSFS_NAME, priv->ida_id);
1549 if (IS_ERR(priv->fw_attr_dev)) {
1550 err = PTR_ERR(priv->fw_attr_dev);
1551 goto err_free_ida;
1552 }
1553
1554 priv->fw_attr_kset = kset_create_and_add("attributes", NULL,
1555 &priv->fw_attr_dev->kobj);
1556 if (!priv->fw_attr_kset) {
1557 err = -ENOMEM;
1558 goto err_destroy_classdev;
1559 }
1560
1561 for (i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++) {
1562 cd01_attr_groups[i].tunable_attr->dev = &priv->wdev->dev;
1563 if (!lwmi_attr_01_is_supported(cd01_attr_groups[i].tunable_attr))
1564 continue;
1565
1566 err = sysfs_create_group(&priv->fw_attr_kset->kobj,
1567 cd01_attr_groups[i].attr_group);
1568 if (err)
1569 goto err_remove_groups;
1570 }
1571 return;
1572
1573 err_remove_groups:
1574 while (i--)
1575 sysfs_remove_group(&priv->fw_attr_kset->kobj,
1576 cd01_attr_groups[i].attr_group);
1577
1578 kset_unregister(priv->fw_attr_kset);
1579
1580 err_destroy_classdev:
1581 device_unregister(priv->fw_attr_dev);
1582
1583 err_free_ida:
1584 ida_free(&lwmi_om_ida, priv->ida_id);
1585
1586 err_no_ida:
1587 priv->ida_id = -EIDRM;
1588
1589 dev_warn(&priv->wdev->dev,
1590 "failed to register firmware-attributes device: %d\n", err);
1591 }
1592
1593 /**
1594 * lwmi_om_fw_attr_remove() - Unregister all capability data attribute groups
1595 * @priv: the lenovo-wmi-other driver data.
1596 */
lwmi_om_fw_attr_remove(struct lwmi_om_priv * priv)1597 static void lwmi_om_fw_attr_remove(struct lwmi_om_priv *priv)
1598 {
1599 if (priv->ida_id < 0)
1600 return;
1601
1602 for (unsigned int i = 0; i < ARRAY_SIZE(cd01_attr_groups) - 1; i++)
1603 sysfs_remove_group(&priv->fw_attr_kset->kobj,
1604 cd01_attr_groups[i].attr_group);
1605
1606 kset_unregister(priv->fw_attr_kset);
1607 device_unregister(priv->fw_attr_dev);
1608 ida_free(&lwmi_om_ida, priv->ida_id);
1609 priv->ida_id = -EIDRM;
1610 }
1611
1612 /* ======== Self (master: lenovo-wmi-other) ======== */
1613
1614 /**
1615 * lwmi_om_master_bind() - Bind all components of the other mode driver
1616 * @dev: The lenovo-wmi-other driver basic device.
1617 *
1618 * Call component_bind_all to bind the lenovo-wmi-capdata devices to the
1619 * lenovo-wmi-other master driver, with a callback to collect fan info from
1620 * capdata_fan. On success, assign the capability data list pointers to the
1621 * driver data struct for later access. These pointers are only valid while the
1622 * capdata interfaces exist. Finally, collect fan info from capdata00 and
1623 * register all firmware attribute groups. Note that the HWMON device is
1624 * registered only if all fan info is collected. Hence, it is not registered
1625 * here. See lwmi_om_fan_info_collect_cd00() and
1626 * lwmi_om_fan_info_collect_cd_fan().
1627 *
1628 * Return: 0 on success, or an error code.
1629 */
lwmi_om_master_bind(struct device * dev)1630 static int lwmi_om_master_bind(struct device *dev)
1631 {
1632 struct lwmi_om_priv *priv = dev_get_drvdata(dev);
1633 struct lwmi_cd_binder binder = {
1634 .cd_fan_list_cb = lwmi_om_fan_info_collect_cd_fan,
1635 };
1636 int ret;
1637
1638 lwmi_om_fan_info_init(priv);
1639
1640 ret = component_bind_all(dev, &binder);
1641 if (ret)
1642 return ret;
1643
1644 priv->cd00_list = binder.cd00_list;
1645 priv->cd01_list = binder.cd01_list;
1646 if (!priv->cd00_list || !priv->cd01_list) {
1647 component_unbind_all(dev, NULL);
1648
1649 return -ENODEV;
1650 }
1651
1652 lwmi_om_fan_info_collect_cd00(priv);
1653 lwmi_om_psy_ext_init(priv);
1654
1655 lwmi_om_fw_attr_add(priv);
1656
1657 return 0;
1658 }
1659
1660 /**
1661 * lwmi_om_master_unbind() - Unbind all components of the other mode driver
1662 * @dev: The lenovo-wmi-other driver basic device
1663 *
1664 * Unregister all firmware attribute groups and the HWMON device. Then call
1665 * component_unbind_all to unbind lenovo-wmi-capdata devices from the
1666 * lenovo-wmi-other master driver.
1667 */
lwmi_om_master_unbind(struct device * dev)1668 static void lwmi_om_master_unbind(struct device *dev)
1669 {
1670 struct lwmi_om_priv *priv = dev_get_drvdata(dev);
1671
1672 lwmi_om_fw_attr_remove(priv);
1673
1674 lwmi_om_hwmon_remove(priv);
1675
1676 lwmi_om_psy_remove(priv);
1677
1678 component_unbind_all(dev, NULL);
1679 }
1680
1681 static const struct component_master_ops lwmi_om_master_ops = {
1682 .bind = lwmi_om_master_bind,
1683 .unbind = lwmi_om_master_unbind,
1684 };
1685
lwmi_other_probe(struct wmi_device * wdev,const void * context)1686 static int lwmi_other_probe(struct wmi_device *wdev, const void *context)
1687 {
1688 struct component_match *master_match = NULL;
1689 struct lwmi_om_priv *priv;
1690
1691 priv = devm_kzalloc(&wdev->dev, sizeof(*priv), GFP_KERNEL);
1692 if (!priv)
1693 return -ENOMEM;
1694
1695 /* Sentinel for on-demand ida_free(). */
1696 priv->ida_id = -EIDRM;
1697
1698 priv->wdev = wdev;
1699 dev_set_drvdata(&wdev->dev, priv);
1700
1701 lwmi_cd_match_add_all(&wdev->dev, &master_match);
1702 if (IS_ERR(master_match))
1703 return PTR_ERR(master_match);
1704
1705 return component_master_add_with_match(&wdev->dev, &lwmi_om_master_ops,
1706 master_match);
1707 }
1708
lwmi_other_remove(struct wmi_device * wdev)1709 static void lwmi_other_remove(struct wmi_device *wdev)
1710 {
1711 component_master_del(&wdev->dev, &lwmi_om_master_ops);
1712 }
1713
1714 static const struct wmi_device_id lwmi_other_id_table[] = {
1715 { LENOVO_OTHER_MODE_GUID, NULL },
1716 {}
1717 };
1718
1719 static struct wmi_driver lwmi_other_driver = {
1720 .driver = {
1721 .name = "lenovo_wmi_other",
1722 .probe_type = PROBE_PREFER_ASYNCHRONOUS,
1723 },
1724 .id_table = lwmi_other_id_table,
1725 .probe = lwmi_other_probe,
1726 .remove = lwmi_other_remove,
1727 .no_singleton = true,
1728 };
1729
1730 module_wmi_driver(lwmi_other_driver);
1731
1732 MODULE_IMPORT_NS("LENOVO_WMI_CAPDATA");
1733 MODULE_IMPORT_NS("LENOVO_WMI_HELPERS");
1734 MODULE_DEVICE_TABLE(wmi, lwmi_other_id_table);
1735 MODULE_AUTHOR("Derek J. Clark <derekjohn.clark@gmail.com>");
1736 MODULE_AUTHOR("Rong Zhang <i@rong.moe>");
1737 MODULE_DESCRIPTION("Lenovo Other Mode WMI Driver");
1738 MODULE_LICENSE("GPL");
1739