1 /*
2 * Alienware AlienFX control
3 *
4 * Copyright (C) 2014 Dell Inc <mario_limonciello@dell.com>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 */
17
18 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
19
20 #include <linux/acpi.h>
21 #include <linux/module.h>
22 #include <linux/platform_device.h>
23 #include <linux/dmi.h>
24 #include <linux/leds.h>
25
26 #define LEGACY_CONTROL_GUID "A90597CE-A997-11DA-B012-B622A1EF5492"
27 #define LEGACY_POWER_CONTROL_GUID "A80593CE-A997-11DA-B012-B622A1EF5492"
28 #define WMAX_CONTROL_GUID "A70591CE-A997-11DA-B012-B622A1EF5492"
29
30 #define WMAX_METHOD_HDMI_SOURCE 0x1
31 #define WMAX_METHOD_HDMI_STATUS 0x2
32 #define WMAX_METHOD_BRIGHTNESS 0x3
33 #define WMAX_METHOD_ZONE_CONTROL 0x4
34 #define WMAX_METHOD_HDMI_CABLE 0x5
35 #define WMAX_METHOD_AMPLIFIER_CABLE 0x6
36 #define WMAX_METHOD_DEEP_SLEEP_CONTROL 0x0B
37 #define WMAX_METHOD_DEEP_SLEEP_STATUS 0x0C
38
39 MODULE_AUTHOR("Mario Limonciello <mario_limonciello@dell.com>");
40 MODULE_DESCRIPTION("Alienware special feature control");
41 MODULE_LICENSE("GPL");
42 MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID);
43 MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID);
44
45 enum INTERFACE_FLAGS {
46 LEGACY,
47 WMAX,
48 };
49
50 enum LEGACY_CONTROL_STATES {
51 LEGACY_RUNNING = 1,
52 LEGACY_BOOTING = 0,
53 LEGACY_SUSPEND = 3,
54 };
55
56 enum WMAX_CONTROL_STATES {
57 WMAX_RUNNING = 0xFF,
58 WMAX_BOOTING = 0,
59 WMAX_SUSPEND = 3,
60 };
61
62 struct quirk_entry {
63 u8 num_zones;
64 u8 hdmi_mux;
65 u8 amplifier;
66 u8 deepslp;
67 };
68
69 static struct quirk_entry *quirks;
70
71 static struct quirk_entry quirk_unknown = {
72 .num_zones = 2,
73 .hdmi_mux = 0,
74 .amplifier = 0,
75 .deepslp = 0,
76 };
77
78 static struct quirk_entry quirk_x51_r1_r2 = {
79 .num_zones = 3,
80 .hdmi_mux = 0,
81 .amplifier = 0,
82 .deepslp = 0,
83 };
84
85 static struct quirk_entry quirk_x51_r3 = {
86 .num_zones = 4,
87 .hdmi_mux = 0,
88 .amplifier = 1,
89 .deepslp = 0,
90 };
91
92 static struct quirk_entry quirk_asm100 = {
93 .num_zones = 2,
94 .hdmi_mux = 1,
95 .amplifier = 0,
96 .deepslp = 0,
97 };
98
99 static struct quirk_entry quirk_asm200 = {
100 .num_zones = 2,
101 .hdmi_mux = 1,
102 .amplifier = 0,
103 .deepslp = 1,
104 };
105
106 static struct quirk_entry quirk_asm201 = {
107 .num_zones = 2,
108 .hdmi_mux = 1,
109 .amplifier = 1,
110 .deepslp = 1,
111 };
112
dmi_matched(const struct dmi_system_id * dmi)113 static int __init dmi_matched(const struct dmi_system_id *dmi)
114 {
115 quirks = dmi->driver_data;
116 return 1;
117 }
118
119 static const struct dmi_system_id alienware_quirks[] __initconst = {
120 {
121 .callback = dmi_matched,
122 .ident = "Alienware X51 R3",
123 .matches = {
124 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
125 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R3"),
126 },
127 .driver_data = &quirk_x51_r3,
128 },
129 {
130 .callback = dmi_matched,
131 .ident = "Alienware X51 R2",
132 .matches = {
133 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
134 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51 R2"),
135 },
136 .driver_data = &quirk_x51_r1_r2,
137 },
138 {
139 .callback = dmi_matched,
140 .ident = "Alienware X51 R1",
141 .matches = {
142 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
143 DMI_MATCH(DMI_PRODUCT_NAME, "Alienware X51"),
144 },
145 .driver_data = &quirk_x51_r1_r2,
146 },
147 {
148 .callback = dmi_matched,
149 .ident = "Alienware ASM100",
150 .matches = {
151 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
152 DMI_MATCH(DMI_PRODUCT_NAME, "ASM100"),
153 },
154 .driver_data = &quirk_asm100,
155 },
156 {
157 .callback = dmi_matched,
158 .ident = "Alienware ASM200",
159 .matches = {
160 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
161 DMI_MATCH(DMI_PRODUCT_NAME, "ASM200"),
162 },
163 .driver_data = &quirk_asm200,
164 },
165 {
166 .callback = dmi_matched,
167 .ident = "Alienware ASM201",
168 .matches = {
169 DMI_MATCH(DMI_SYS_VENDOR, "Alienware"),
170 DMI_MATCH(DMI_PRODUCT_NAME, "ASM201"),
171 },
172 .driver_data = &quirk_asm201,
173 },
174 {}
175 };
176
177 struct color_platform {
178 u8 blue;
179 u8 green;
180 u8 red;
181 } __packed;
182
183 struct platform_zone {
184 u8 location;
185 struct device_attribute *attr;
186 struct color_platform colors;
187 };
188
189 struct wmax_brightness_args {
190 u32 led_mask;
191 u32 percentage;
192 };
193
194 struct wmax_basic_args {
195 u8 arg;
196 };
197
198 struct legacy_led_args {
199 struct color_platform colors;
200 u8 brightness;
201 u8 state;
202 } __packed;
203
204 struct wmax_led_args {
205 u32 led_mask;
206 struct color_platform colors;
207 u8 state;
208 } __packed;
209
210 static struct platform_device *platform_device;
211 static struct device_attribute *zone_dev_attrs;
212 static struct attribute **zone_attrs;
213 static struct platform_zone *zone_data;
214
215 static struct platform_driver platform_driver = {
216 .driver = {
217 .name = "alienware-wmi",
218 }
219 };
220
221 static struct attribute_group zone_attribute_group = {
222 .name = "rgb_zones",
223 };
224
225 static u8 interface;
226 static u8 lighting_control_state;
227 static u8 global_brightness;
228
229 /*
230 * Helpers used for zone control
231 */
parse_rgb(const char * buf,struct platform_zone * zone)232 static int parse_rgb(const char *buf, struct platform_zone *zone)
233 {
234 long unsigned int rgb;
235 int ret;
236 union color_union {
237 struct color_platform cp;
238 int package;
239 } repackager;
240
241 ret = kstrtoul(buf, 16, &rgb);
242 if (ret)
243 return ret;
244
245 /* RGB triplet notation is 24-bit hexadecimal */
246 if (rgb > 0xFFFFFF)
247 return -EINVAL;
248
249 repackager.package = rgb & 0x0f0f0f0f;
250 pr_debug("alienware-wmi: r: %d g:%d b: %d\n",
251 repackager.cp.red, repackager.cp.green, repackager.cp.blue);
252 zone->colors = repackager.cp;
253 return 0;
254 }
255
match_zone(struct device_attribute * attr)256 static struct platform_zone *match_zone(struct device_attribute *attr)
257 {
258 u8 zone;
259
260 for (zone = 0; zone < quirks->num_zones; zone++) {
261 if ((struct device_attribute *)zone_data[zone].attr == attr) {
262 pr_debug("alienware-wmi: matched zone location: %d\n",
263 zone_data[zone].location);
264 return &zone_data[zone];
265 }
266 }
267 return NULL;
268 }
269
270 /*
271 * Individual RGB zone control
272 */
alienware_update_led(struct platform_zone * zone)273 static int alienware_update_led(struct platform_zone *zone)
274 {
275 int method_id;
276 acpi_status status;
277 char *guid;
278 struct acpi_buffer input;
279 struct legacy_led_args legacy_args;
280 struct wmax_led_args wmax_basic_args;
281 if (interface == WMAX) {
282 wmax_basic_args.led_mask = 1 << zone->location;
283 wmax_basic_args.colors = zone->colors;
284 wmax_basic_args.state = lighting_control_state;
285 guid = WMAX_CONTROL_GUID;
286 method_id = WMAX_METHOD_ZONE_CONTROL;
287
288 input.length = (acpi_size) sizeof(wmax_basic_args);
289 input.pointer = &wmax_basic_args;
290 } else {
291 legacy_args.colors = zone->colors;
292 legacy_args.brightness = global_brightness;
293 legacy_args.state = 0;
294 if (lighting_control_state == LEGACY_BOOTING ||
295 lighting_control_state == LEGACY_SUSPEND) {
296 guid = LEGACY_POWER_CONTROL_GUID;
297 legacy_args.state = lighting_control_state;
298 } else
299 guid = LEGACY_CONTROL_GUID;
300 method_id = zone->location + 1;
301
302 input.length = (acpi_size) sizeof(legacy_args);
303 input.pointer = &legacy_args;
304 }
305 pr_debug("alienware-wmi: guid %s method %d\n", guid, method_id);
306
307 status = wmi_evaluate_method(guid, 0, method_id, &input, NULL);
308 if (ACPI_FAILURE(status))
309 pr_err("alienware-wmi: zone set failure: %u\n", status);
310 return ACPI_FAILURE(status);
311 }
312
zone_show(struct device * dev,struct device_attribute * attr,char * buf)313 static ssize_t zone_show(struct device *dev, struct device_attribute *attr,
314 char *buf)
315 {
316 struct platform_zone *target_zone;
317 target_zone = match_zone(attr);
318 if (target_zone == NULL)
319 return sprintf(buf, "red: -1, green: -1, blue: -1\n");
320 return sprintf(buf, "red: %d, green: %d, blue: %d\n",
321 target_zone->colors.red,
322 target_zone->colors.green, target_zone->colors.blue);
323
324 }
325
zone_set(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)326 static ssize_t zone_set(struct device *dev, struct device_attribute *attr,
327 const char *buf, size_t count)
328 {
329 struct platform_zone *target_zone;
330 int ret;
331 target_zone = match_zone(attr);
332 if (target_zone == NULL) {
333 pr_err("alienware-wmi: invalid target zone\n");
334 return 1;
335 }
336 ret = parse_rgb(buf, target_zone);
337 if (ret)
338 return ret;
339 ret = alienware_update_led(target_zone);
340 return ret ? ret : count;
341 }
342
343 /*
344 * LED Brightness (Global)
345 */
wmax_brightness(int brightness)346 static int wmax_brightness(int brightness)
347 {
348 acpi_status status;
349 struct acpi_buffer input;
350 struct wmax_brightness_args args = {
351 .led_mask = 0xFF,
352 .percentage = brightness,
353 };
354 input.length = (acpi_size) sizeof(args);
355 input.pointer = &args;
356 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
357 WMAX_METHOD_BRIGHTNESS, &input, NULL);
358 if (ACPI_FAILURE(status))
359 pr_err("alienware-wmi: brightness set failure: %u\n", status);
360 return ACPI_FAILURE(status);
361 }
362
global_led_set(struct led_classdev * led_cdev,enum led_brightness brightness)363 static void global_led_set(struct led_classdev *led_cdev,
364 enum led_brightness brightness)
365 {
366 int ret;
367 global_brightness = brightness;
368 if (interface == WMAX)
369 ret = wmax_brightness(brightness);
370 else
371 ret = alienware_update_led(&zone_data[0]);
372 if (ret)
373 pr_err("LED brightness update failed\n");
374 }
375
global_led_get(struct led_classdev * led_cdev)376 static enum led_brightness global_led_get(struct led_classdev *led_cdev)
377 {
378 return global_brightness;
379 }
380
381 static struct led_classdev global_led = {
382 .brightness_set = global_led_set,
383 .brightness_get = global_led_get,
384 .name = "alienware::global_brightness",
385 };
386
387 /*
388 * Lighting control state device attribute (Global)
389 */
show_control_state(struct device * dev,struct device_attribute * attr,char * buf)390 static ssize_t show_control_state(struct device *dev,
391 struct device_attribute *attr, char *buf)
392 {
393 if (lighting_control_state == LEGACY_BOOTING)
394 return scnprintf(buf, PAGE_SIZE, "[booting] running suspend\n");
395 else if (lighting_control_state == LEGACY_SUSPEND)
396 return scnprintf(buf, PAGE_SIZE, "booting running [suspend]\n");
397 return scnprintf(buf, PAGE_SIZE, "booting [running] suspend\n");
398 }
399
store_control_state(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)400 static ssize_t store_control_state(struct device *dev,
401 struct device_attribute *attr,
402 const char *buf, size_t count)
403 {
404 long unsigned int val;
405 if (strcmp(buf, "booting\n") == 0)
406 val = LEGACY_BOOTING;
407 else if (strcmp(buf, "suspend\n") == 0)
408 val = LEGACY_SUSPEND;
409 else if (interface == LEGACY)
410 val = LEGACY_RUNNING;
411 else
412 val = WMAX_RUNNING;
413 lighting_control_state = val;
414 pr_debug("alienware-wmi: updated control state to %d\n",
415 lighting_control_state);
416 return count;
417 }
418
419 static DEVICE_ATTR(lighting_control_state, 0644, show_control_state,
420 store_control_state);
421
alienware_zone_init(struct platform_device * dev)422 static int alienware_zone_init(struct platform_device *dev)
423 {
424 u8 zone;
425 char buffer[10];
426 char *name;
427
428 if (interface == WMAX) {
429 lighting_control_state = WMAX_RUNNING;
430 } else if (interface == LEGACY) {
431 lighting_control_state = LEGACY_RUNNING;
432 }
433 global_led.max_brightness = 0x0F;
434 global_brightness = global_led.max_brightness;
435
436 /*
437 * - zone_dev_attrs num_zones + 1 is for individual zones and then
438 * null terminated
439 * - zone_attrs num_zones + 2 is for all attrs in zone_dev_attrs +
440 * the lighting control + null terminated
441 * - zone_data num_zones is for the distinct zones
442 */
443 zone_dev_attrs =
444 kzalloc(sizeof(struct device_attribute) * (quirks->num_zones + 1),
445 GFP_KERNEL);
446 if (!zone_dev_attrs)
447 return -ENOMEM;
448
449 zone_attrs =
450 kzalloc(sizeof(struct attribute *) * (quirks->num_zones + 2),
451 GFP_KERNEL);
452 if (!zone_attrs)
453 return -ENOMEM;
454
455 zone_data =
456 kzalloc(sizeof(struct platform_zone) * (quirks->num_zones),
457 GFP_KERNEL);
458 if (!zone_data)
459 return -ENOMEM;
460
461 for (zone = 0; zone < quirks->num_zones; zone++) {
462 sprintf(buffer, "zone%02hhX", zone);
463 name = kstrdup(buffer, GFP_KERNEL);
464 if (name == NULL)
465 return 1;
466 sysfs_attr_init(&zone_dev_attrs[zone].attr);
467 zone_dev_attrs[zone].attr.name = name;
468 zone_dev_attrs[zone].attr.mode = 0644;
469 zone_dev_attrs[zone].show = zone_show;
470 zone_dev_attrs[zone].store = zone_set;
471 zone_data[zone].location = zone;
472 zone_attrs[zone] = &zone_dev_attrs[zone].attr;
473 zone_data[zone].attr = &zone_dev_attrs[zone];
474 }
475 zone_attrs[quirks->num_zones] = &dev_attr_lighting_control_state.attr;
476 zone_attribute_group.attrs = zone_attrs;
477
478 led_classdev_register(&dev->dev, &global_led);
479
480 return sysfs_create_group(&dev->dev.kobj, &zone_attribute_group);
481 }
482
alienware_zone_exit(struct platform_device * dev)483 static void alienware_zone_exit(struct platform_device *dev)
484 {
485 u8 zone;
486
487 sysfs_remove_group(&dev->dev.kobj, &zone_attribute_group);
488 led_classdev_unregister(&global_led);
489 if (zone_dev_attrs) {
490 for (zone = 0; zone < quirks->num_zones; zone++)
491 kfree(zone_dev_attrs[zone].attr.name);
492 }
493 kfree(zone_dev_attrs);
494 kfree(zone_data);
495 kfree(zone_attrs);
496 }
497
alienware_wmax_command(struct wmax_basic_args * in_args,u32 command,int * out_data)498 static acpi_status alienware_wmax_command(struct wmax_basic_args *in_args,
499 u32 command, int *out_data)
500 {
501 acpi_status status;
502 union acpi_object *obj;
503 struct acpi_buffer input;
504 struct acpi_buffer output;
505
506 input.length = (acpi_size) sizeof(*in_args);
507 input.pointer = in_args;
508 if (out_data) {
509 output.length = ACPI_ALLOCATE_BUFFER;
510 output.pointer = NULL;
511 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
512 command, &input, &output);
513 if (ACPI_SUCCESS(status)) {
514 obj = (union acpi_object *)output.pointer;
515 if (obj && obj->type == ACPI_TYPE_INTEGER)
516 *out_data = (u32)obj->integer.value;
517 }
518 kfree(output.pointer);
519 } else {
520 status = wmi_evaluate_method(WMAX_CONTROL_GUID, 0,
521 command, &input, NULL);
522 }
523 return status;
524 }
525
526 /*
527 * The HDMI mux sysfs node indicates the status of the HDMI input mux.
528 * It can toggle between standard system GPU output and HDMI input.
529 */
show_hdmi_cable(struct device * dev,struct device_attribute * attr,char * buf)530 static ssize_t show_hdmi_cable(struct device *dev,
531 struct device_attribute *attr, char *buf)
532 {
533 acpi_status status;
534 u32 out_data;
535 struct wmax_basic_args in_args = {
536 .arg = 0,
537 };
538 status =
539 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_CABLE,
540 (u32 *) &out_data);
541 if (ACPI_SUCCESS(status)) {
542 if (out_data == 0)
543 return scnprintf(buf, PAGE_SIZE,
544 "[unconnected] connected unknown\n");
545 else if (out_data == 1)
546 return scnprintf(buf, PAGE_SIZE,
547 "unconnected [connected] unknown\n");
548 }
549 pr_err("alienware-wmi: unknown HDMI cable status: %d\n", status);
550 return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
551 }
552
show_hdmi_source(struct device * dev,struct device_attribute * attr,char * buf)553 static ssize_t show_hdmi_source(struct device *dev,
554 struct device_attribute *attr, char *buf)
555 {
556 acpi_status status;
557 u32 out_data;
558 struct wmax_basic_args in_args = {
559 .arg = 0,
560 };
561 status =
562 alienware_wmax_command(&in_args, WMAX_METHOD_HDMI_STATUS,
563 (u32 *) &out_data);
564
565 if (ACPI_SUCCESS(status)) {
566 if (out_data == 1)
567 return scnprintf(buf, PAGE_SIZE,
568 "[input] gpu unknown\n");
569 else if (out_data == 2)
570 return scnprintf(buf, PAGE_SIZE,
571 "input [gpu] unknown\n");
572 }
573 pr_err("alienware-wmi: unknown HDMI source status: %u\n", status);
574 return scnprintf(buf, PAGE_SIZE, "input gpu [unknown]\n");
575 }
576
toggle_hdmi_source(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)577 static ssize_t toggle_hdmi_source(struct device *dev,
578 struct device_attribute *attr,
579 const char *buf, size_t count)
580 {
581 acpi_status status;
582 struct wmax_basic_args args;
583 if (strcmp(buf, "gpu\n") == 0)
584 args.arg = 1;
585 else if (strcmp(buf, "input\n") == 0)
586 args.arg = 2;
587 else
588 args.arg = 3;
589 pr_debug("alienware-wmi: setting hdmi to %d : %s", args.arg, buf);
590
591 status = alienware_wmax_command(&args, WMAX_METHOD_HDMI_SOURCE, NULL);
592
593 if (ACPI_FAILURE(status))
594 pr_err("alienware-wmi: HDMI toggle failed: results: %u\n",
595 status);
596 return count;
597 }
598
599 static DEVICE_ATTR(cable, S_IRUGO, show_hdmi_cable, NULL);
600 static DEVICE_ATTR(source, S_IRUGO | S_IWUSR, show_hdmi_source,
601 toggle_hdmi_source);
602
603 static struct attribute *hdmi_attrs[] = {
604 &dev_attr_cable.attr,
605 &dev_attr_source.attr,
606 NULL,
607 };
608
609 static const struct attribute_group hdmi_attribute_group = {
610 .name = "hdmi",
611 .attrs = hdmi_attrs,
612 };
613
remove_hdmi(struct platform_device * dev)614 static void remove_hdmi(struct platform_device *dev)
615 {
616 if (quirks->hdmi_mux > 0)
617 sysfs_remove_group(&dev->dev.kobj, &hdmi_attribute_group);
618 }
619
create_hdmi(struct platform_device * dev)620 static int create_hdmi(struct platform_device *dev)
621 {
622 int ret;
623
624 ret = sysfs_create_group(&dev->dev.kobj, &hdmi_attribute_group);
625 if (ret)
626 remove_hdmi(dev);
627 return ret;
628 }
629
630 /*
631 * Alienware GFX amplifier support
632 * - Currently supports reading cable status
633 * - Leaving expansion room to possibly support dock/undock events later
634 */
show_amplifier_status(struct device * dev,struct device_attribute * attr,char * buf)635 static ssize_t show_amplifier_status(struct device *dev,
636 struct device_attribute *attr, char *buf)
637 {
638 acpi_status status;
639 u32 out_data;
640 struct wmax_basic_args in_args = {
641 .arg = 0,
642 };
643 status =
644 alienware_wmax_command(&in_args, WMAX_METHOD_AMPLIFIER_CABLE,
645 (u32 *) &out_data);
646 if (ACPI_SUCCESS(status)) {
647 if (out_data == 0)
648 return scnprintf(buf, PAGE_SIZE,
649 "[unconnected] connected unknown\n");
650 else if (out_data == 1)
651 return scnprintf(buf, PAGE_SIZE,
652 "unconnected [connected] unknown\n");
653 }
654 pr_err("alienware-wmi: unknown amplifier cable status: %d\n", status);
655 return scnprintf(buf, PAGE_SIZE, "unconnected connected [unknown]\n");
656 }
657
658 static DEVICE_ATTR(status, S_IRUGO, show_amplifier_status, NULL);
659
660 static struct attribute *amplifier_attrs[] = {
661 &dev_attr_status.attr,
662 NULL,
663 };
664
665 static const struct attribute_group amplifier_attribute_group = {
666 .name = "amplifier",
667 .attrs = amplifier_attrs,
668 };
669
remove_amplifier(struct platform_device * dev)670 static void remove_amplifier(struct platform_device *dev)
671 {
672 if (quirks->amplifier > 0)
673 sysfs_remove_group(&dev->dev.kobj, &lifier_attribute_group);
674 }
675
create_amplifier(struct platform_device * dev)676 static int create_amplifier(struct platform_device *dev)
677 {
678 int ret;
679
680 ret = sysfs_create_group(&dev->dev.kobj, &lifier_attribute_group);
681 if (ret)
682 remove_amplifier(dev);
683 return ret;
684 }
685
686 /*
687 * Deep Sleep Control support
688 * - Modifies BIOS setting for deep sleep control allowing extra wakeup events
689 */
show_deepsleep_status(struct device * dev,struct device_attribute * attr,char * buf)690 static ssize_t show_deepsleep_status(struct device *dev,
691 struct device_attribute *attr, char *buf)
692 {
693 acpi_status status;
694 u32 out_data;
695 struct wmax_basic_args in_args = {
696 .arg = 0,
697 };
698 status = alienware_wmax_command(&in_args, WMAX_METHOD_DEEP_SLEEP_STATUS,
699 (u32 *) &out_data);
700 if (ACPI_SUCCESS(status)) {
701 if (out_data == 0)
702 return scnprintf(buf, PAGE_SIZE,
703 "[disabled] s5 s5_s4\n");
704 else if (out_data == 1)
705 return scnprintf(buf, PAGE_SIZE,
706 "disabled [s5] s5_s4\n");
707 else if (out_data == 2)
708 return scnprintf(buf, PAGE_SIZE,
709 "disabled s5 [s5_s4]\n");
710 }
711 pr_err("alienware-wmi: unknown deep sleep status: %d\n", status);
712 return scnprintf(buf, PAGE_SIZE, "disabled s5 s5_s4 [unknown]\n");
713 }
714
toggle_deepsleep(struct device * dev,struct device_attribute * attr,const char * buf,size_t count)715 static ssize_t toggle_deepsleep(struct device *dev,
716 struct device_attribute *attr,
717 const char *buf, size_t count)
718 {
719 acpi_status status;
720 struct wmax_basic_args args;
721
722 if (strcmp(buf, "disabled\n") == 0)
723 args.arg = 0;
724 else if (strcmp(buf, "s5\n") == 0)
725 args.arg = 1;
726 else
727 args.arg = 2;
728 pr_debug("alienware-wmi: setting deep sleep to %d : %s", args.arg, buf);
729
730 status = alienware_wmax_command(&args, WMAX_METHOD_DEEP_SLEEP_CONTROL,
731 NULL);
732
733 if (ACPI_FAILURE(status))
734 pr_err("alienware-wmi: deep sleep control failed: results: %u\n",
735 status);
736 return count;
737 }
738
739 static DEVICE_ATTR(deepsleep, S_IRUGO | S_IWUSR, show_deepsleep_status, toggle_deepsleep);
740
741 static struct attribute *deepsleep_attrs[] = {
742 &dev_attr_deepsleep.attr,
743 NULL,
744 };
745
746 static const struct attribute_group deepsleep_attribute_group = {
747 .name = "deepsleep",
748 .attrs = deepsleep_attrs,
749 };
750
remove_deepsleep(struct platform_device * dev)751 static void remove_deepsleep(struct platform_device *dev)
752 {
753 if (quirks->deepslp > 0)
754 sysfs_remove_group(&dev->dev.kobj, &deepsleep_attribute_group);
755 }
756
create_deepsleep(struct platform_device * dev)757 static int create_deepsleep(struct platform_device *dev)
758 {
759 int ret;
760
761 ret = sysfs_create_group(&dev->dev.kobj, &deepsleep_attribute_group);
762 if (ret)
763 remove_deepsleep(dev);
764 return ret;
765 }
766
alienware_wmi_init(void)767 static int __init alienware_wmi_init(void)
768 {
769 int ret;
770
771 if (wmi_has_guid(LEGACY_CONTROL_GUID))
772 interface = LEGACY;
773 else if (wmi_has_guid(WMAX_CONTROL_GUID))
774 interface = WMAX;
775 else {
776 pr_warn("alienware-wmi: No known WMI GUID found\n");
777 return -ENODEV;
778 }
779
780 dmi_check_system(alienware_quirks);
781 if (quirks == NULL)
782 quirks = &quirk_unknown;
783
784 ret = platform_driver_register(&platform_driver);
785 if (ret)
786 goto fail_platform_driver;
787 platform_device = platform_device_alloc("alienware-wmi", -1);
788 if (!platform_device) {
789 ret = -ENOMEM;
790 goto fail_platform_device1;
791 }
792 ret = platform_device_add(platform_device);
793 if (ret)
794 goto fail_platform_device2;
795
796 if (quirks->hdmi_mux > 0) {
797 ret = create_hdmi(platform_device);
798 if (ret)
799 goto fail_prep_hdmi;
800 }
801
802 if (quirks->amplifier > 0) {
803 ret = create_amplifier(platform_device);
804 if (ret)
805 goto fail_prep_amplifier;
806 }
807
808 if (quirks->deepslp > 0) {
809 ret = create_deepsleep(platform_device);
810 if (ret)
811 goto fail_prep_deepsleep;
812 }
813
814 ret = alienware_zone_init(platform_device);
815 if (ret)
816 goto fail_prep_zones;
817
818 return 0;
819
820 fail_prep_zones:
821 alienware_zone_exit(platform_device);
822 fail_prep_deepsleep:
823 fail_prep_amplifier:
824 fail_prep_hdmi:
825 platform_device_del(platform_device);
826 fail_platform_device2:
827 platform_device_put(platform_device);
828 fail_platform_device1:
829 platform_driver_unregister(&platform_driver);
830 fail_platform_driver:
831 return ret;
832 }
833
834 module_init(alienware_wmi_init);
835
alienware_wmi_exit(void)836 static void __exit alienware_wmi_exit(void)
837 {
838 if (platform_device) {
839 alienware_zone_exit(platform_device);
840 remove_hdmi(platform_device);
841 platform_device_unregister(platform_device);
842 platform_driver_unregister(&platform_driver);
843 }
844 }
845
846 module_exit(alienware_wmi_exit);
847