1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * Alienware AlienFX control
4 *
5 * Copyright (C) 2014 Dell Inc <Dell.Client.Kernel@dell.com>
6 */
7
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
9
10 #include <linux/acpi.h>
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/dmi.h>
14 #include <linux/leds.h>
15
16 #define LEGACY_CONTROL_GUID "A90597CE-A997-11DA-B012-B622A1EF5492"
17 #define LEGACY_POWER_CONTROL_GUID "A80593CE-A997-11DA-B012-B622A1EF5492"
18 #define WMAX_CONTROL_GUID "A70591CE-A997-11DA-B012-B622A1EF5492"
19
20 #define WMAX_METHOD_HDMI_SOURCE 0x1
21 #define WMAX_METHOD_HDMI_STATUS 0x2
22 #define WMAX_METHOD_BRIGHTNESS 0x3
23 #define WMAX_METHOD_ZONE_CONTROL 0x4
24 #define WMAX_METHOD_HDMI_CABLE 0x5
25 #define WMAX_METHOD_AMPLIFIER_CABLE 0x6
26 #define WMAX_METHOD_DEEP_SLEEP_CONTROL 0x0B
27 #define WMAX_METHOD_DEEP_SLEEP_STATUS 0x0C
28
29 MODULE_AUTHOR("Mario Limonciello <mario.limonciello@outlook.com>");
30 MODULE_DESCRIPTION("Alienware special feature control");
31 MODULE_LICENSE("GPL");
32 MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
33 MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);
34
35 enum INTERFACE_FLAGS {
36 LEGACY,
37 WMAX,
38 };
39
40 enum LEGACY_CONTROL_STATES {
41 LEGACY_RUNNING = 1,
42 LEGACY_BOOTING = 0,
43 LEGACY_SUSPEND = 3,
44 };
45
46 enum WMAX_CONTROL_STATES {
47 WMAX_RUNNING = 0xFF,
48 WMAX_BOOTING = 0,
49 WMAX_SUSPEND = 3,
50 };
51
52 struct quirk_entry {
53 u8 num_zones;
54 u8 hdmi_mux;
55 u8 amplifier;
56 u8 deepslp;
57 };
58
59 static struct quirk_entry *quirks;
60
61
62 static struct quirk_entry quirk_inspiron5675 = {
63 .num_zones = 2,
64 .hdmi_mux = 0,
65 .amplifier = 0,
66 .deepslp = 0,
67 };
68
69 static struct quirk_entry quirk_unknown = {
70 .num_zones = 2,
71 .hdmi_mux = 0,
72 .amplifier = 0,
73 .deepslp = 0,
74 };
75
76 static struct quirk_entry quirk_x51_r1_r2 = {
77 .num_zones = 3,
78 .hdmi_mux = 0,
79 .amplifier = 0,
80 .deepslp = 0,
81 };
82
83 static struct quirk_entry quirk_x51_r3 = {
84 .num_zones = 4,
85 .hdmi_mux = 0,
86 .amplifier = 1,
87 .deepslp = 0,
88 };
89
90 static struct quirk_entry quirk_asm100 = {
91 .num_zones = 2,
92 .hdmi_mux = 1,
93 .amplifier = 0,
94 .deepslp = 0,
95 };
96
97 static struct quirk_entry quirk_asm200 = {
98 .num_zones = 2,
99 .hdmi_mux = 1,
100 .amplifier = 0,
101 .deepslp = 1,
102 };
103
104 static struct quirk_entry quirk_asm201 = {
105 .num_zones = 2,
106 .hdmi_mux = 1,
107 .amplifier = 1,
108 .deepslp = 1,
109 };
110
dmi_matched(const struct dmi_system_id * dmi)111 static int __init dmi_matched(const struct dmi_system_id *dmi)
112 {
113 quirks = dmi->driver_data;
114 return 1;
115 }
116
117 static const struct dmi_system_id alienware_quirks[] __initconst = {
118 {
119 .callback = dmi_matched,
120 .ident = "Alienware X51 R3",
121 .matches = {
122 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
123 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R3"),
124 },
125 .driver_data = &quirk_x51_r3,
126 },
127 {
128 .callback = dmi_matched,
129 .ident = "Alienware X51 R2",
130 .matches = {
131 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
132 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
133 },
134 .driver_data = &quirk_x51_r1_r2,
135 },
136 {
137 .callback = dmi_matched,
138 .ident = "Alienware X51 R1",
139 .matches = {
140 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
141 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
142 },
143 .driver_data = &quirk_x51_r1_r2,
144 },
145 {
146 .callback = dmi_matched,
147 .ident = "Alienware ASM100",
148 .matches = {
149 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
150 DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
151 },
152 .driver_data = &quirk_asm100,
153 },
154 {
155 .callback = dmi_matched,
156 .ident = "Alienware ASM200",
157 .matches = {
158 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
159 DMI_MATCH(DMI_PRODUCT_NAME, "ASM200"),
160 },
161 .driver_data = &quirk_asm200,
162 },
163 {
164 .callback = dmi_matched,
165 .ident = "Alienware ASM201",
166 .matches = {
167 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
168 DMI_MATCH(DMI_PRODUCT_NAME, "ASM201"),
169 },
170 .driver_data = &quirk_asm201,
171 },
172 {
173 .callback = dmi_matched,
174 .ident = "Dell Inc. Inspiron 5675",
175 .matches = {
176 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
177 DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5675"),
178 },
179 .driver_data = &quirk_inspiron5675,
180 },
181 {}
182 };
183
184 struct color_platform {
185 u8 blue;
186 u8 green;
187 u8 red;
188 } __packed;
189
190 struct platform_zone {
191 u8 location;
192 struct device_attribute *attr;
193 struct color_platform colors;
194 };
195
196 struct wmax_brightness_args {
197 u32 led_mask;
198 u32 percentage;
199 };
200
201 struct wmax_basic_args {
202 u8 arg;
203 };
204
205 struct legacy_led_args {
206 struct color_platform colors;
207 u8 brightness;
208 u8 state;
209 } __packed;
210
211 struct wmax_led_args {
212 u32 led_mask;
213 struct color_platform colors;
214 u8 state;
215 } __packed;
216
217 static struct platform_device *platform_device;
218 static struct device_attribute *zone_dev_attrs;
219 static struct attribute **zone_attrs;
220 static struct platform_zone *zone_data;
221
222 static struct platform_driver platform_driver = {
223 .driver = {
224 .name = "alienware-wmi",
225 }
226 };
227
228 static struct attribute_group zone_attribute_group = {
229 .name = "rgb_zones",
230 };
231
232 static u8 interface;
233 static u8 lighting_control_state;
234 static u8 global_brightness;
235
236 /*
237 * Helpers used for zone control
238 */
parse_rgb(const char * buf,struct platform_zone * zone)239 static int parse_rgb(const char *buf, struct platform_zone *zone)
240 {
241 long unsigned int rgb;
242 int ret;
243 union color_union {
244 struct color_platform cp;
245 int package;
246 } repackager;
247
248 ret = kstrtoul(buf, 16, &rgb);
249 if (ret)
250 return ret;
251
252 /* RGB triplet notation is 24-bit hexadecimal */
253 if (rgb > 0xFFFFFF)
254 return -EINVAL;
255
256 repackager.package = rgb & 0x0f0f0f0f;
257 pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
258 repackager.cp.red, repackager.cp.green, repackager.cp.blue);
259 zone->colors = repackager.cp;
260 return 0;
261 }
262
match_zone(struct device_attribute * attr)263 static struct platform_zone *match_zone(struct device_attribute *attr)
264 {
265 u8 zone;
266
267 for (zone = 0; zone < quirks->num_zones; zone++) {
268 if ((struct device_attribute *)zone_data[zone].attr == attr) {
269 pr_debug("alienware-wmi: matched zone location: %d\n",
270 zone_data[zone].location);
271 return &zone_data[zone];
272 }
273 }
274 return NULL;
275 }
276
277 /*
278 * Individual RGB zone control
279 */
alienware_update_led(struct platform_zone * zone)280 static int alienware_update_led(struct platform_zone *zone)
281 {
282 int method_id;
283 acpi_status status;
284 char *guid;
285 struct acpi_buffer input;
286 struct legacy_led_args legacy_args;
287 struct wmax_led_args wmax_basic_args;
288 if (interface == WMAX) {
289 wmax_basic_args.led_mask = 1 << zone->location;
290 wmax_basic_args.colors = zone->colors;
291 wmax_basic_args.state = lighting_control_state;
292 guid = WMAX_CONTROL_GUID;
293 method_id = WMAX_METHOD_ZONE_CONTROL;
294
295 input.length = (acpi_size) sizeof(wmax_basic_args);
296 input.pointer = &wmax_basic_args;
297 } else {
298 legacy_args.colors = zone->colors;
299 legacy_args.brightness = global_brightness;
300 legacy_args.state = 0;
301 if (lighting_control_state == LEGACY_BOOTING ||
302 lighting_control_state == LEGACY_SUSPEND) {
303 guid = LEGACY_POWER_CONTROL_GUID;
304 legacy_args.state = lighting_control_state;
305 } else
306 guid = LEGACY_CONTROL_GUID;
307 method_id = zone->location + 1;
308
309 input.length = (acpi_size) sizeof(legacy_args);
310 input.pointer = &legacy_args;
311 }
312 pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
313
314 status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
315 if (ACPI_FAILURE(status))
316 pr_err("alienware-wmi: zone set failure: %u\n", status);
317 return ACPI_FAILURE(status);
318 }
319
zone_show(struct device * dev,struct device_attribute * attr,char * buf)320 static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
321 char *buf)
322 {
323 struct platform_zone *target_zone;
324 target_zone = match_zone(attr);
325 if (target_zone == NULL)
326 return sprintf(buf, "red: -1, green: -1, blue: -1\n");
327 return sprintf(buf, "red: %d, green: %d, blue: %d\n",
328 target_zone->colors.red,
329 target_zone->colors.green, target_zone->colors.blue);
330
331 }
332
zone_set(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)333 static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
334 const char *buf, size_t count)
335 {
336 struct platform_zone *target_zone;
337 int ret;
338 target_zone = match_zone(attr);
339 if (target_zone == NULL) {
340 pr_err("alienware-wmi: invalid target zone\n");
341 return 1;
342 }
343 ret = parse_rgb(buf, target_zone);
344 if (ret)
345 return ret;
346 ret = alienware_update_led(target_zone);
347 return ret ? ret : count;
348 }
349
350 /*
351 * LED Brightness (Global)
352 */
wmax_brightness(int brightness)353 static int wmax_brightness(int brightness)
354 {
355 acpi_status status;
356 struct acpi_buffer input;
357 struct wmax_brightness_args args = {
358 .led_mask = 0xFF,
359 .percentage = brightness,
360 };
361 input.length = (acpi_size) sizeof(args);
362 input.pointer = &args;
363 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
364 WMAX_METHOD_BRIGHTNESS, &input, NULL);
365 if (ACPI_FAILURE(status))
366 pr_err("alienware-wmi: brightness set failure: %u\n", status);
367 return ACPI_FAILURE(status);
368 }
369
global_led_set(struct led_classdev * led_cdev,enum led_brightness brightness)370 static void global_led_set(struct led_classdev *led_cdev,
371 enum led_brightness brightness)
372 {
373 int ret;
374 global_brightness = brightness;
375 if (interface == WMAX)
376 ret = wmax_brightness(brightness);
377 else
378 ret = alienware_update_led(&zone_data[0]);
379 if (ret)
380 pr_err("LED brightness update failed\n");
381 }
382
global_led_get(struct led_classdev * led_cdev)383 static enum led_brightness global_led_get(struct led_classdev *led_cdev)
384 {
385 return global_brightness;
386 }
387
388 static struct led_classdev global_led = {
389 .brightness_set = global_led_set,
390 .brightness_get = global_led_get,
391 .name = "alienware::global_brightness",
392 };
393
394 /*
395 * Lighting control state device attribute (Global)
396 */
show_control_state(struct device * dev,struct device_attribute * attr,char * buf)397 static ssize_t show_control_state(struct device *dev,
398 struct device_attribute *attr, char *buf)
399 {
400 if (lighting_control_state == LEGACY_BOOTING)
401 return sysfs_emit(buf, "[booting] running suspend\n");
402 else if (lighting_control_state == LEGACY_SUSPEND)
403 return sysfs_emit(buf, "booting running [suspend]\n");
404 return sysfs_emit(buf, "booting [running] suspend\n");
405 }
406
store_control_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)407 static ssize_t store_control_state(struct device *dev,
408 struct device_attribute *attr,
409 const char *buf, size_t count)
410 {
411 long unsigned int val;
412 if (strcmp(buf, "booting\n") == 0)
413 val = LEGACY_BOOTING;
414 else if (strcmp(buf, "suspend\n") == 0)
415 val = LEGACY_SUSPEND;
416 else if (interface == LEGACY)
417 val = LEGACY_RUNNING;
418 else
419 val = WMAX_RUNNING;
420 lighting_control_state = val;
421 pr_debug("alienware-wmi: updated control state to %d\n",
422 lighting_control_state);
423 return count;
424 }
425
426 static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
427 store_control_state);
428
alienware_zone_init(struct platform_device * dev)429 static int alienware_zone_init(struct platform_device *dev)
430 {
431 u8 zone;
432 char buffer[10];
433 char *name;
434
435 if (interface == WMAX) {
436 lighting_control_state = WMAX_RUNNING;
437 } else if (interface == LEGACY) {
438 lighting_control_state = LEGACY_RUNNING;
439 }
440 global_led.max_brightness = 0x0F;
441 global_brightness = global_led.max_brightness;
442
443 /*
444 * - zone_dev_attrs num_zones + 1 is for individual zones and then
445 * null terminated
446 * - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
447 * the lighting control + null terminated
448 * - zone_data num_zones is for the distinct zones
449 */
450 zone_dev_attrs =
451 kcalloc(quirks->num_zones + 1, sizeof(struct device_attribute),
452 GFP_KERNEL);
453 if (!zone_dev_attrs)
454 return -ENOMEM;
455
456 zone_attrs =
457 kcalloc(quirks->num_zones + 2, sizeof(struct attribute *),
458 GFP_KERNEL);
459 if (!zone_attrs)
460 return -ENOMEM;
461
462 zone_data =
463 kcalloc(quirks->num_zones, sizeof(struct platform_zone),
464 GFP_KERNEL);
465 if (!zone_data)
466 return -ENOMEM;
467
468 for (zone = 0; zone < quirks->num_zones; zone++) {
469 sprintf(buffer, "zone%02hhX", zone);
470 name = kstrdup(buffer, GFP_KERNEL);
471 if (name == NULL)
472 return 1;
473 sysfs_attr_init(&zone_dev_attrs[zone].attr);
474 zone_dev_attrs[zone].attr.name = name;
475 zone_dev_attrs[zone].attr.mode = 0644;
476 zone_dev_attrs[zone].show = zone_show;
477 zone_dev_attrs[zone].store = zone_set;
478 zone_data[zone].location = zone;
479 zone_attrs[zone] = &zone_dev_attrs[zone].attr;
480 zone_data[zone].attr = &zone_dev_attrs[zone];
481 }
482 zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
483 zone_attribute_group.attrs = zone_attrs;
484
485 led_classdev_register(&dev->dev, &global_led);
486
487 return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
488 }
489
alienware_zone_exit(struct platform_device * dev)490 static void alienware_zone_exit(struct platform_device *dev)
491 {
492 u8 zone;
493
494 sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
495 led_classdev_unregister(&global_led);
496 if (zone_dev_attrs) {
497 for (zone = 0; zone < quirks->num_zones; zone++)
498 kfree(zone_dev_attrs[zone].attr.name);
499 }
500 kfree(zone_dev_attrs);
501 kfree(zone_data);
502 kfree(zone_attrs);
503 }
504
alienware_wmax_command(struct wmax_basic_args * in_args,u32 command,int * out_data)505 static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
506 u32 command, int *out_data)
507 {
508 acpi_status status;
509 union acpi_object *obj;
510 struct acpi_buffer input;
511 struct acpi_buffer output;
512
513 input.length = (acpi_size) sizeof(*in_args);
514 input.pointer = in_args;
515 if (out_data) {
516 output.length = ACPI_ALLOCATE_BUFFER;
517 output.pointer = NULL;
518 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
519 command, &input, &output);
520 if (ACPI_SUCCESS(status)) {
521 obj = (union acpi_object *)output.pointer;
522 if (obj && obj->type == ACPI_TYPE_INTEGER)
523 *out_data = (u32)obj->integer.value;
524 }
525 kfree(output.pointer);
526 } else {
527 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
528 command, &input, NULL);
529 }
530 return status;
531 }
532
533 /*
534 * The HDMI mux sysfs node indicates the status of the HDMI input mux.
535 * It can toggle between standard system GPU output and HDMI input.
536 */
show_hdmi_cable(struct device * dev,struct device_attribute * attr,char * buf)537 static ssize_t show_hdmi_cable(struct device *dev,
538 struct device_attribute *attr, char *buf)
539 {
540 acpi_status status;
541 u32 out_data;
542 struct wmax_basic_args in_args = {
543 .arg = 0,
544 };
545 status =
546 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
547 (u32 *) &out_data);
548 if (ACPI_SUCCESS(status)) {
549 if (out_data == 0)
550 return sysfs_emit(buf, "[unconnected] connected unknown\n");
551 else if (out_data == 1)
552 return sysfs_emit(buf, "unconnected [connected] unknown\n");
553 }
554 pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
555 return sysfs_emit(buf, "unconnected connected [unknown]\n");
556 }
557
show_hdmi_source(struct device * dev,struct device_attribute * attr,char * buf)558 static ssize_t show_hdmi_source(struct device *dev,
559 struct device_attribute *attr, char *buf)
560 {
561 acpi_status status;
562 u32 out_data;
563 struct wmax_basic_args in_args = {
564 .arg = 0,
565 };
566 status =
567 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
568 (u32 *) &out_data);
569
570 if (ACPI_SUCCESS(status)) {
571 if (out_data == 1)
572 return sysfs_emit(buf, "[input] gpu unknown\n");
573 else if (out_data == 2)
574 return sysfs_emit(buf, "input [gpu] unknown\n");
575 }
576 pr_err("alienware-wmi: unknown HDMI source status: %u\n", status);
577 return sysfs_emit(buf, "input gpu [unknown]\n");
578 }
579
toggle_hdmi_source(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)580 static ssize_t toggle_hdmi_source(struct device *dev,
581 struct device_attribute *attr,
582 const char *buf, size_t count)
583 {
584 acpi_status status;
585 struct wmax_basic_args args;
586 if (strcmp(buf, "gpu\n") == 0)
587 args.arg = 1;
588 else if (strcmp(buf, "input\n") == 0)
589 args.arg = 2;
590 else
591 args.arg = 3;
592 pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
593
594 status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
595
596 if (ACPI_FAILURE(status))
597 pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
598 status);
599 return count;
600 }
601
602 static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
603 static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
604 toggle_hdmi_source);
605
606 static struct attribute *hdmi_attrs[] = {
607 &dev_attr_cable.attr,
608 &dev_attr_source.attr,
609 NULL,
610 };
611
612 static const struct attribute_group hdmi_attribute_group = {
613 .name = "hdmi",
614 .attrs = hdmi_attrs,
615 };
616
remove_hdmi(struct platform_device * dev)617 static void remove_hdmi(struct platform_device *dev)
618 {
619 if (quirks->hdmi_mux > 0)
620 sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
621 }
622
create_hdmi(struct platform_device * dev)623 static int create_hdmi(struct platform_device *dev)
624 {
625 int ret;
626
627 ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
628 if (ret)
629 remove_hdmi(dev);
630 return ret;
631 }
632
633 /*
634 * Alienware GFX amplifier support
635 * - Currently supports reading cable status
636 * - Leaving expansion room to possibly support dock/undock events later
637 */
show_amplifier_status(struct device * dev,struct device_attribute * attr,char * buf)638 static ssize_t show_amplifier_status(struct device *dev,
639 struct device_attribute *attr, char *buf)
640 {
641 acpi_status status;
642 u32 out_data;
643 struct wmax_basic_args in_args = {
644 .arg = 0,
645 };
646 status =
647 alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
648 (u32 *) &out_data);
649 if (ACPI_SUCCESS(status)) {
650 if (out_data == 0)
651 return sysfs_emit(buf, "[unconnected] connected unknown\n");
652 else if (out_data == 1)
653 return sysfs_emit(buf, "unconnected [connected] unknown\n");
654 }
655 pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
656 return sysfs_emit(buf, "unconnected connected [unknown]\n");
657 }
658
659 static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);
660
661 static struct attribute *amplifier_attrs[] = {
662 &dev_attr_status.attr,
663 NULL,
664 };
665
666 static const struct attribute_group amplifier_attribute_group = {
667 .name = "amplifier",
668 .attrs = amplifier_attrs,
669 };
670
remove_amplifier(struct platform_device * dev)671 static void remove_amplifier(struct platform_device *dev)
672 {
673 if (quirks->amplifier > 0)
674 sysfs_remove_group(&dev->dev.kobj, &lifier_attribute_group);
675 }
676
create_amplifier(struct platform_device * dev)677 static int create_amplifier(struct platform_device *dev)
678 {
679 int ret;
680
681 ret = sysfs_create_group(&dev->dev.kobj, &lifier_attribute_group);
682 if (ret)
683 remove_amplifier(dev);
684 return ret;
685 }
686
687 /*
688 * Deep Sleep Control support
689 * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
690 */
show_deepsleep_status(struct device * dev,struct device_attribute * attr,char * buf)691 static ssize_t show_deepsleep_status(struct device *dev,
692 struct device_attribute *attr, char *buf)
693 {
694 acpi_status status;
695 u32 out_data;
696 struct wmax_basic_args in_args = {
697 .arg = 0,
698 };
699 status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
700 (u32 *) &out_data);
701 if (ACPI_SUCCESS(status)) {
702 if (out_data == 0)
703 return sysfs_emit(buf, "[disabled] s5 s5_s4\n");
704 else if (out_data == 1)
705 return sysfs_emit(buf, "disabled [s5] s5_s4\n");
706 else if (out_data == 2)
707 return sysfs_emit(buf, "disabled s5 [s5_s4]\n");
708 }
709 pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
710 return sysfs_emit(buf, "disabled s5 s5_s4 [unknown]\n");
711 }
712
toggle_deepsleep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)713 static ssize_t toggle_deepsleep(struct device *dev,
714 struct device_attribute *attr,
715 const char *buf, size_t count)
716 {
717 acpi_status status;
718 struct wmax_basic_args args;
719
720 if (strcmp(buf, "disabled\n") == 0)
721 args.arg = 0;
722 else if (strcmp(buf, "s5\n") == 0)
723 args.arg = 1;
724 else
725 args.arg = 2;
726 pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
727
728 status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
729 NULL);
730
731 if (ACPI_FAILURE(status))
732 pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
733 status);
734 return count;
735 }
736
737 static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);
738
739 static struct attribute *deepsleep_attrs[] = {
740 &dev_attr_deepsleep.attr,
741 NULL,
742 };
743
744 static const struct attribute_group deepsleep_attribute_group = {
745 .name = "deepsleep",
746 .attrs = deepsleep_attrs,
747 };
748
remove_deepsleep(struct platform_device * dev)749 static void remove_deepsleep(struct platform_device *dev)
750 {
751 if (quirks->deepslp > 0)
752 sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
753 }
754
create_deepsleep(struct platform_device * dev)755 static int create_deepsleep(struct platform_device *dev)
756 {
757 int ret;
758
759 ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
760 if (ret)
761 remove_deepsleep(dev);
762 return ret;
763 }
764
alienware_wmi_init(void)765 static int __init alienware_wmi_init(void)
766 {
767 int ret;
768
769 if (wmi_has_guid(LEGACY_CONTROL_GUID))
770 interface = LEGACY;
771 else if (wmi_has_guid(WMAX_CONTROL_GUID))
772 interface = WMAX;
773 else {
774 pr_warn("alienware-wmi: No known WMI GUID found\n");
775 return -ENODEV;
776 }
777
778 dmi_check_system(alienware_quirks);
779 if (quirks == NULL)
780 quirks = &quirk_unknown;
781
782 ret = platform_driver_register(&platform_driver);
783 if (ret)
784 goto fail_platform_driver;
785 platform_device = platform_device_alloc("alienware-wmi", PLATFORM_DEVID_NONE);
786 if (!platform_device) {
787 ret = -ENOMEM;
788 goto fail_platform_device1;
789 }
790 ret = platform_device_add(platform_device);
791 if (ret)
792 goto fail_platform_device2;
793
794 if (quirks->hdmi_mux > 0) {
795 ret = create_hdmi(platform_device);
796 if (ret)
797 goto fail_prep_hdmi;
798 }
799
800 if (quirks->amplifier > 0) {
801 ret = create_amplifier(platform_device);
802 if (ret)
803 goto fail_prep_amplifier;
804 }
805
806 if (quirks->deepslp > 0) {
807 ret = create_deepsleep(platform_device);
808 if (ret)
809 goto fail_prep_deepsleep;
810 }
811
812 ret = alienware_zone_init(platform_device);
813 if (ret)
814 goto fail_prep_zones;
815
816 return 0;
817
818 fail_prep_zones:
819 alienware_zone_exit(platform_device);
820 fail_prep_deepsleep:
821 fail_prep_amplifier:
822 fail_prep_hdmi:
823 platform_device_del(platform_device);
824 fail_platform_device2:
825 platform_device_put(platform_device);
826 fail_platform_device1:
827 platform_driver_unregister(&platform_driver);
828 fail_platform_driver:
829 return ret;
830 }
831
832 module_init(alienware_wmi_init);
833
alienware_wmi_exit(void)834 static void __exit alienware_wmi_exit(void)
835 {
836 if (platform_device) {
837 alienware_zone_exit(platform_device);
838 remove_hdmi(platform_device);
839 platform_device_unregister(platform_device);
840 platform_driver_unregister(&platform_driver);
841 }
842 }
843
844 module_exit(alienware_wmi_exit);
845