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 *name;
433
434 if (interface == WMAX) {
435 lighting_control_state = WMAX_RUNNING;
436 } else if (interface == LEGACY) {
437 lighting_control_state = LEGACY_RUNNING;
438 }
439 global_led.max_brightness = 0x0F;
440 global_brightness = global_led.max_brightness;
441
442 /*
443 * - zone_dev_attrs num_zones + 1 is for individual zones and then
444 * null terminated
445 * - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
446 * the lighting control + null terminated
447 * - zone_data num_zones is for the distinct zones
448 */
449 zone_dev_attrs =
450 kcalloc(quirks->num_zones + 1, sizeof(struct device_attribute),
451 GFP_KERNEL);
452 if (!zone_dev_attrs)
453 return -ENOMEM;
454
455 zone_attrs =
456 kcalloc(quirks->num_zones + 2, sizeof(struct attribute *),
457 GFP_KERNEL);
458 if (!zone_attrs)
459 return -ENOMEM;
460
461 zone_data =
462 kcalloc(quirks->num_zones, sizeof(struct platform_zone),
463 GFP_KERNEL);
464 if (!zone_data)
465 return -ENOMEM;
466
467 for (zone = 0; zone < quirks->num_zones; zone++) {
468 name = kasprintf(GFP_KERNEL, "zone%02hhX", zone);
469 if (name == NULL)
470 return 1;
471 sysfs_attr_init(&zone_dev_attrs[zone].attr);
472 zone_dev_attrs[zone].attr.name = name;
473 zone_dev_attrs[zone].attr.mode = 0644;
474 zone_dev_attrs[zone].show = zone_show;
475 zone_dev_attrs[zone].store = zone_set;
476 zone_data[zone].location = zone;
477 zone_attrs[zone] = &zone_dev_attrs[zone].attr;
478 zone_data[zone].attr = &zone_dev_attrs[zone];
479 }
480 zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
481 zone_attribute_group.attrs = zone_attrs;
482
483 led_classdev_register(&dev->dev, &global_led);
484
485 return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
486 }
487
alienware_zone_exit(struct platform_device * dev)488 static void alienware_zone_exit(struct platform_device *dev)
489 {
490 u8 zone;
491
492 sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
493 led_classdev_unregister(&global_led);
494 if (zone_dev_attrs) {
495 for (zone = 0; zone < quirks->num_zones; zone++)
496 kfree(zone_dev_attrs[zone].attr.name);
497 }
498 kfree(zone_dev_attrs);
499 kfree(zone_data);
500 kfree(zone_attrs);
501 }
502
alienware_wmax_command(struct wmax_basic_args * in_args,u32 command,int * out_data)503 static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
504 u32 command, int *out_data)
505 {
506 acpi_status status;
507 union acpi_object *obj;
508 struct acpi_buffer input;
509 struct acpi_buffer output;
510
511 input.length = (acpi_size) sizeof(*in_args);
512 input.pointer = in_args;
513 if (out_data) {
514 output.length = ACPI_ALLOCATE_BUFFER;
515 output.pointer = NULL;
516 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
517 command, &input, &output);
518 if (ACPI_SUCCESS(status)) {
519 obj = (union acpi_object *)output.pointer;
520 if (obj && obj->type == ACPI_TYPE_INTEGER)
521 *out_data = (u32)obj->integer.value;
522 }
523 kfree(output.pointer);
524 } else {
525 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
526 command, &input, NULL);
527 }
528 return status;
529 }
530
531 /*
532 * The HDMI mux sysfs node indicates the status of the HDMI input mux.
533 * It can toggle between standard system GPU output and HDMI input.
534 */
show_hdmi_cable(struct device * dev,struct device_attribute * attr,char * buf)535 static ssize_t show_hdmi_cable(struct device *dev,
536 struct device_attribute *attr, char *buf)
537 {
538 acpi_status status;
539 u32 out_data;
540 struct wmax_basic_args in_args = {
541 .arg = 0,
542 };
543 status =
544 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
545 (u32 *) &out_data);
546 if (ACPI_SUCCESS(status)) {
547 if (out_data == 0)
548 return sysfs_emit(buf, "[unconnected] connected unknown\n");
549 else if (out_data == 1)
550 return sysfs_emit(buf, "unconnected [connected] unknown\n");
551 }
552 pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
553 return sysfs_emit(buf, "unconnected connected [unknown]\n");
554 }
555
show_hdmi_source(struct device * dev,struct device_attribute * attr,char * buf)556 static ssize_t show_hdmi_source(struct device *dev,
557 struct device_attribute *attr, char *buf)
558 {
559 acpi_status status;
560 u32 out_data;
561 struct wmax_basic_args in_args = {
562 .arg = 0,
563 };
564 status =
565 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
566 (u32 *) &out_data);
567
568 if (ACPI_SUCCESS(status)) {
569 if (out_data == 1)
570 return sysfs_emit(buf, "[input] gpu unknown\n");
571 else if (out_data == 2)
572 return sysfs_emit(buf, "input [gpu] unknown\n");
573 }
574 pr_err("alienware-wmi: unknown HDMI source status: %u\n", status);
575 return sysfs_emit(buf, "input gpu [unknown]\n");
576 }
577
toggle_hdmi_source(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)578 static ssize_t toggle_hdmi_source(struct device *dev,
579 struct device_attribute *attr,
580 const char *buf, size_t count)
581 {
582 acpi_status status;
583 struct wmax_basic_args args;
584 if (strcmp(buf, "gpu\n") == 0)
585 args.arg = 1;
586 else if (strcmp(buf, "input\n") == 0)
587 args.arg = 2;
588 else
589 args.arg = 3;
590 pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
591
592 status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
593
594 if (ACPI_FAILURE(status))
595 pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
596 status);
597 return count;
598 }
599
600 static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
601 static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
602 toggle_hdmi_source);
603
604 static struct attribute *hdmi_attrs[] = {
605 &dev_attr_cable.attr,
606 &dev_attr_source.attr,
607 NULL,
608 };
609
610 static const struct attribute_group hdmi_attribute_group = {
611 .name = "hdmi",
612 .attrs = hdmi_attrs,
613 };
614
remove_hdmi(struct platform_device * dev)615 static void remove_hdmi(struct platform_device *dev)
616 {
617 if (quirks->hdmi_mux > 0)
618 sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
619 }
620
create_hdmi(struct platform_device * dev)621 static int create_hdmi(struct platform_device *dev)
622 {
623 int ret;
624
625 ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
626 if (ret)
627 remove_hdmi(dev);
628 return ret;
629 }
630
631 /*
632 * Alienware GFX amplifier support
633 * - Currently supports reading cable status
634 * - Leaving expansion room to possibly support dock/undock events later
635 */
show_amplifier_status(struct device * dev,struct device_attribute * attr,char * buf)636 static ssize_t show_amplifier_status(struct device *dev,
637 struct device_attribute *attr, char *buf)
638 {
639 acpi_status status;
640 u32 out_data;
641 struct wmax_basic_args in_args = {
642 .arg = 0,
643 };
644 status =
645 alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
646 (u32 *) &out_data);
647 if (ACPI_SUCCESS(status)) {
648 if (out_data == 0)
649 return sysfs_emit(buf, "[unconnected] connected unknown\n");
650 else if (out_data == 1)
651 return sysfs_emit(buf, "unconnected [connected] unknown\n");
652 }
653 pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
654 return sysfs_emit(buf, "unconnected connected [unknown]\n");
655 }
656
657 static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);
658
659 static struct attribute *amplifier_attrs[] = {
660 &dev_attr_status.attr,
661 NULL,
662 };
663
664 static const struct attribute_group amplifier_attribute_group = {
665 .name = "amplifier",
666 .attrs = amplifier_attrs,
667 };
668
remove_amplifier(struct platform_device * dev)669 static void remove_amplifier(struct platform_device *dev)
670 {
671 if (quirks->amplifier > 0)
672 sysfs_remove_group(&dev->dev.kobj, &lifier_attribute_group);
673 }
674
create_amplifier(struct platform_device * dev)675 static int create_amplifier(struct platform_device *dev)
676 {
677 int ret;
678
679 ret = sysfs_create_group(&dev->dev.kobj, &lifier_attribute_group);
680 if (ret)
681 remove_amplifier(dev);
682 return ret;
683 }
684
685 /*
686 * Deep Sleep Control support
687 * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
688 */
show_deepsleep_status(struct device * dev,struct device_attribute * attr,char * buf)689 static ssize_t show_deepsleep_status(struct device *dev,
690 struct device_attribute *attr, char *buf)
691 {
692 acpi_status status;
693 u32 out_data;
694 struct wmax_basic_args in_args = {
695 .arg = 0,
696 };
697 status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
698 (u32 *) &out_data);
699 if (ACPI_SUCCESS(status)) {
700 if (out_data == 0)
701 return sysfs_emit(buf, "[disabled] s5 s5_s4\n");
702 else if (out_data == 1)
703 return sysfs_emit(buf, "disabled [s5] s5_s4\n");
704 else if (out_data == 2)
705 return sysfs_emit(buf, "disabled s5 [s5_s4]\n");
706 }
707 pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
708 return sysfs_emit(buf, "disabled s5 s5_s4 [unknown]\n");
709 }
710
toggle_deepsleep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)711 static ssize_t toggle_deepsleep(struct device *dev,
712 struct device_attribute *attr,
713 const char *buf, size_t count)
714 {
715 acpi_status status;
716 struct wmax_basic_args args;
717
718 if (strcmp(buf, "disabled\n") == 0)
719 args.arg = 0;
720 else if (strcmp(buf, "s5\n") == 0)
721 args.arg = 1;
722 else
723 args.arg = 2;
724 pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
725
726 status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
727 NULL);
728
729 if (ACPI_FAILURE(status))
730 pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
731 status);
732 return count;
733 }
734
735 static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);
736
737 static struct attribute *deepsleep_attrs[] = {
738 &dev_attr_deepsleep.attr,
739 NULL,
740 };
741
742 static const struct attribute_group deepsleep_attribute_group = {
743 .name = "deepsleep",
744 .attrs = deepsleep_attrs,
745 };
746
remove_deepsleep(struct platform_device * dev)747 static void remove_deepsleep(struct platform_device *dev)
748 {
749 if (quirks->deepslp > 0)
750 sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
751 }
752
create_deepsleep(struct platform_device * dev)753 static int create_deepsleep(struct platform_device *dev)
754 {
755 int ret;
756
757 ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
758 if (ret)
759 remove_deepsleep(dev);
760 return ret;
761 }
762
alienware_wmi_init(void)763 static int __init alienware_wmi_init(void)
764 {
765 int ret;
766
767 if (wmi_has_guid(LEGACY_CONTROL_GUID))
768 interface = LEGACY;
769 else if (wmi_has_guid(WMAX_CONTROL_GUID))
770 interface = WMAX;
771 else {
772 pr_warn("alienware-wmi: No known WMI GUID found\n");
773 return -ENODEV;
774 }
775
776 dmi_check_system(alienware_quirks);
777 if (quirks == NULL)
778 quirks = &quirk_unknown;
779
780 ret = platform_driver_register(&platform_driver);
781 if (ret)
782 goto fail_platform_driver;
783 platform_device = platform_device_alloc("alienware-wmi", PLATFORM_DEVID_NONE);
784 if (!platform_device) {
785 ret = -ENOMEM;
786 goto fail_platform_device1;
787 }
788 ret = platform_device_add(platform_device);
789 if (ret)
790 goto fail_platform_device2;
791
792 if (quirks->hdmi_mux > 0) {
793 ret = create_hdmi(platform_device);
794 if (ret)
795 goto fail_prep_hdmi;
796 }
797
798 if (quirks->amplifier > 0) {
799 ret = create_amplifier(platform_device);
800 if (ret)
801 goto fail_prep_amplifier;
802 }
803
804 if (quirks->deepslp > 0) {
805 ret = create_deepsleep(platform_device);
806 if (ret)
807 goto fail_prep_deepsleep;
808 }
809
810 ret = alienware_zone_init(platform_device);
811 if (ret)
812 goto fail_prep_zones;
813
814 return 0;
815
816 fail_prep_zones:
817 alienware_zone_exit(platform_device);
818 fail_prep_deepsleep:
819 fail_prep_amplifier:
820 fail_prep_hdmi:
821 platform_device_del(platform_device);
822 fail_platform_device2:
823 platform_device_put(platform_device);
824 fail_platform_device1:
825 platform_driver_unregister(&platform_driver);
826 fail_platform_driver:
827 return ret;
828 }
829
830 module_init(alienware_wmi_init);
831
alienware_wmi_exit(void)832 static void __exit alienware_wmi_exit(void)
833 {
834 if (platform_device) {
835 alienware_zone_exit(platform_device);
836 remove_hdmi(platform_device);
837 platform_device_unregister(platform_device);
838 platform_driver_unregister(&platform_driver);
839 }
840 }
841
842 module_exit(alienware_wmi_exit);
843