1 /*
2  *  ideapad-laptop.c - Lenovo IdeaPad ACPI Extras
3  *
4  *  Copyright © 2010 Intel Corporation
5  *  Copyright © 2010 David Woodhouse <dwmw2@infradead.org>
6  *
7  *  This program is free software; you can redistribute it and/or modify
8  *  it under the terms of the GNU General Public License as published by
9  *  the Free Software Foundation; either version 2 of the License, or
10  *  (at your option) any later version.
11  *
12  *  This program is distributed in the hope that it will be useful,
13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15  *  GNU General Public License for more details.
16  *
17  *  You should have received a copy of the GNU General Public License
18  *  along with this program; if not, write to the Free Software
19  *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
20  *  02110-1301, USA.
21  */
22 
23 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
24 
25 #include <linux/kernel.h>
26 #include <linux/module.h>
27 #include <linux/init.h>
28 #include <linux/types.h>
29 #include <linux/acpi.h>
30 #include <linux/rfkill.h>
31 #include <linux/platform_device.h>
32 #include <linux/input.h>
33 #include <linux/input/sparse-keymap.h>
34 #include <linux/backlight.h>
35 #include <linux/fb.h>
36 #include <linux/debugfs.h>
37 #include <linux/seq_file.h>
38 #include <linux/i8042.h>
39 #include <linux/dmi.h>
40 #include <linux/device.h>
41 #include <acpi/video.h>
42 
43 #define IDEAPAD_RFKILL_DEV_NUM	(3)
44 
45 #define BM_CONSERVATION_BIT (5)
46 #define HA_FNLOCK_BIT       (10)
47 
48 #define CFG_BT_BIT	(16)
49 #define CFG_3G_BIT	(17)
50 #define CFG_WIFI_BIT	(18)
51 #define CFG_CAMERA_BIT	(19)
52 
53 #if IS_ENABLED(CONFIG_ACPI_WMI)
54 static const char *const ideapad_wmi_fnesc_events[] = {
55 	"26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
56 	"56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
57 };
58 #endif
59 
60 enum {
61 	BMCMD_CONSERVATION_ON = 3,
62 	BMCMD_CONSERVATION_OFF = 5,
63 	HACMD_FNLOCK_ON = 0xe,
64 	HACMD_FNLOCK_OFF = 0xf,
65 };
66 
67 enum {
68 	VPCCMD_R_VPC1 = 0x10,
69 	VPCCMD_R_BL_MAX,
70 	VPCCMD_R_BL,
71 	VPCCMD_W_BL,
72 	VPCCMD_R_WIFI,
73 	VPCCMD_W_WIFI,
74 	VPCCMD_R_BT,
75 	VPCCMD_W_BT,
76 	VPCCMD_R_BL_POWER,
77 	VPCCMD_R_NOVO,
78 	VPCCMD_R_VPC2,
79 	VPCCMD_R_TOUCHPAD,
80 	VPCCMD_W_TOUCHPAD,
81 	VPCCMD_R_CAMERA,
82 	VPCCMD_W_CAMERA,
83 	VPCCMD_R_3G,
84 	VPCCMD_W_3G,
85 	VPCCMD_R_ODD, /* 0x21 */
86 	VPCCMD_W_FAN,
87 	VPCCMD_R_RF,
88 	VPCCMD_W_RF,
89 	VPCCMD_R_FAN = 0x2B,
90 	VPCCMD_R_SPECIAL_BUTTONS = 0x31,
91 	VPCCMD_W_BL_POWER = 0x33,
92 };
93 
94 struct ideapad_rfk_priv {
95 	int dev;
96 	struct ideapad_private *priv;
97 };
98 
99 struct ideapad_private {
100 	struct acpi_device *adev;
101 	struct rfkill *rfk[IDEAPAD_RFKILL_DEV_NUM];
102 	struct ideapad_rfk_priv rfk_priv[IDEAPAD_RFKILL_DEV_NUM];
103 	struct platform_device *platform_device;
104 	struct input_dev *inputdev;
105 	struct backlight_device *blightdev;
106 	struct dentry *debug;
107 	unsigned long cfg;
108 	bool has_hw_rfkill_switch;
109 	const char *fnesc_guid;
110 };
111 
112 static bool no_bt_rfkill;
113 module_param(no_bt_rfkill, bool, 0444);
114 MODULE_PARM_DESC(no_bt_rfkill, "No rfkill for bluetooth.");
115 
116 /*
117  * ACPI Helpers
118  */
119 #define IDEAPAD_EC_TIMEOUT (200) /* in ms */
120 
121 static int read_method_int(acpi_handle handle, const char *method, int *val)
122 {
123 	acpi_status status;
124 	unsigned long long result;
125 
126 	status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
127 	if (ACPI_FAILURE(status)) {
128 		*val = -1;
129 		return -1;
130 	}
131 	*val = result;
132 	return 0;
133 
134 }
135 
136 static int method_gbmd(acpi_handle handle, unsigned long *ret)
137 {
138 	int result, val;
139 
140 	result = read_method_int(handle, "GBMD", &val);
141 	*ret = val;
142 	return result;
143 }
144 
145 static int method_int1(acpi_handle handle, char *method, int cmd)
146 {
147 	acpi_status status;
148 
149 	status = acpi_execute_simple_method(handle, method, cmd);
150 	return ACPI_FAILURE(status) ? -1 : 0;
151 }
152 
153 static int method_vpcr(acpi_handle handle, int cmd, int *ret)
154 {
155 	acpi_status status;
156 	unsigned long long result;
157 	struct acpi_object_list params;
158 	union acpi_object in_obj;
159 
160 	params.count = 1;
161 	params.pointer = &in_obj;
162 	in_obj.type = ACPI_TYPE_INTEGER;
163 	in_obj.integer.value = cmd;
164 
165 	status = acpi_evaluate_integer(handle, "VPCR", &params, &result);
166 
167 	if (ACPI_FAILURE(status)) {
168 		*ret = -1;
169 		return -1;
170 	}
171 	*ret = result;
172 	return 0;
173 
174 }
175 
176 static int method_vpcw(acpi_handle handle, int cmd, int data)
177 {
178 	struct acpi_object_list params;
179 	union acpi_object in_obj[2];
180 	acpi_status status;
181 
182 	params.count = 2;
183 	params.pointer = in_obj;
184 	in_obj[0].type = ACPI_TYPE_INTEGER;
185 	in_obj[0].integer.value = cmd;
186 	in_obj[1].type = ACPI_TYPE_INTEGER;
187 	in_obj[1].integer.value = data;
188 
189 	status = acpi_evaluate_object(handle, "VPCW", &params, NULL);
190 	if (status != AE_OK)
191 		return -1;
192 	return 0;
193 }
194 
195 static int read_ec_data(acpi_handle handle, int cmd, unsigned long *data)
196 {
197 	int val;
198 	unsigned long int end_jiffies;
199 
200 	if (method_vpcw(handle, 1, cmd))
201 		return -1;
202 
203 	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
204 	     time_before(jiffies, end_jiffies);) {
205 		schedule();
206 		if (method_vpcr(handle, 1, &val))
207 			return -1;
208 		if (val == 0) {
209 			if (method_vpcr(handle, 0, &val))
210 				return -1;
211 			*data = val;
212 			return 0;
213 		}
214 	}
215 	pr_err("timeout in %s\n", __func__);
216 	return -1;
217 }
218 
219 static int write_ec_cmd(acpi_handle handle, int cmd, unsigned long data)
220 {
221 	int val;
222 	unsigned long int end_jiffies;
223 
224 	if (method_vpcw(handle, 0, data))
225 		return -1;
226 	if (method_vpcw(handle, 1, cmd))
227 		return -1;
228 
229 	for (end_jiffies = jiffies+(HZ)*IDEAPAD_EC_TIMEOUT/1000+1;
230 	     time_before(jiffies, end_jiffies);) {
231 		schedule();
232 		if (method_vpcr(handle, 1, &val))
233 			return -1;
234 		if (val == 0)
235 			return 0;
236 	}
237 	pr_err("timeout in %s\n", __func__);
238 	return -1;
239 }
240 
241 /*
242  * debugfs
243  */
244 static int debugfs_status_show(struct seq_file *s, void *data)
245 {
246 	struct ideapad_private *priv = s->private;
247 	unsigned long value;
248 
249 	if (!priv)
250 		return -EINVAL;
251 
252 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &value))
253 		seq_printf(s, "Backlight max:\t%lu\n", value);
254 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL, &value))
255 		seq_printf(s, "Backlight now:\t%lu\n", value);
256 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &value))
257 		seq_printf(s, "BL power value:\t%s\n", value ? "On" : "Off");
258 	seq_printf(s, "=====================\n");
259 
260 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_RF, &value))
261 		seq_printf(s, "Radio status:\t%s(%lu)\n",
262 			   value ? "On" : "Off", value);
263 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_WIFI, &value))
264 		seq_printf(s, "Wifi status:\t%s(%lu)\n",
265 			   value ? "On" : "Off", value);
266 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_BT, &value))
267 		seq_printf(s, "BT status:\t%s(%lu)\n",
268 			   value ? "On" : "Off", value);
269 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_3G, &value))
270 		seq_printf(s, "3G status:\t%s(%lu)\n",
271 			   value ? "On" : "Off", value);
272 	seq_printf(s, "=====================\n");
273 
274 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value))
275 		seq_printf(s, "Touchpad status:%s(%lu)\n",
276 			   value ? "On" : "Off", value);
277 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &value))
278 		seq_printf(s, "Camera status:\t%s(%lu)\n",
279 			   value ? "On" : "Off", value);
280 	seq_puts(s, "=====================\n");
281 
282 	if (!method_gbmd(priv->adev->handle, &value)) {
283 		seq_printf(s, "Conservation mode:\t%s(%lu)\n",
284 			   test_bit(BM_CONSERVATION_BIT, &value) ? "On" : "Off",
285 			   value);
286 	}
287 
288 	return 0;
289 }
290 DEFINE_SHOW_ATTRIBUTE(debugfs_status);
291 
292 static int debugfs_cfg_show(struct seq_file *s, void *data)
293 {
294 	struct ideapad_private *priv = s->private;
295 
296 	if (!priv) {
297 		seq_printf(s, "cfg: N/A\n");
298 	} else {
299 		seq_printf(s, "cfg: 0x%.8lX\n\nCapability: ",
300 			   priv->cfg);
301 		if (test_bit(CFG_BT_BIT, &priv->cfg))
302 			seq_printf(s, "Bluetooth ");
303 		if (test_bit(CFG_3G_BIT, &priv->cfg))
304 			seq_printf(s, "3G ");
305 		if (test_bit(CFG_WIFI_BIT, &priv->cfg))
306 			seq_printf(s, "Wireless ");
307 		if (test_bit(CFG_CAMERA_BIT, &priv->cfg))
308 			seq_printf(s, "Camera ");
309 		seq_printf(s, "\nGraphic: ");
310 		switch ((priv->cfg)&0x700) {
311 		case 0x100:
312 			seq_printf(s, "Intel");
313 			break;
314 		case 0x200:
315 			seq_printf(s, "ATI");
316 			break;
317 		case 0x300:
318 			seq_printf(s, "Nvidia");
319 			break;
320 		case 0x400:
321 			seq_printf(s, "Intel and ATI");
322 			break;
323 		case 0x500:
324 			seq_printf(s, "Intel and Nvidia");
325 			break;
326 		}
327 		seq_printf(s, "\n");
328 	}
329 	return 0;
330 }
331 DEFINE_SHOW_ATTRIBUTE(debugfs_cfg);
332 
333 static int ideapad_debugfs_init(struct ideapad_private *priv)
334 {
335 	struct dentry *node;
336 
337 	priv->debug = debugfs_create_dir("ideapad", NULL);
338 	if (priv->debug == NULL) {
339 		pr_err("failed to create debugfs directory");
340 		goto errout;
341 	}
342 
343 	node = debugfs_create_file("cfg", S_IRUGO, priv->debug, priv,
344 				   &debugfs_cfg_fops);
345 	if (!node) {
346 		pr_err("failed to create cfg in debugfs");
347 		goto errout;
348 	}
349 
350 	node = debugfs_create_file("status", S_IRUGO, priv->debug, priv,
351 				   &debugfs_status_fops);
352 	if (!node) {
353 		pr_err("failed to create status in debugfs");
354 		goto errout;
355 	}
356 
357 	return 0;
358 
359 errout:
360 	return -ENOMEM;
361 }
362 
363 static void ideapad_debugfs_exit(struct ideapad_private *priv)
364 {
365 	debugfs_remove_recursive(priv->debug);
366 	priv->debug = NULL;
367 }
368 
369 /*
370  * sysfs
371  */
372 static ssize_t show_ideapad_cam(struct device *dev,
373 				struct device_attribute *attr,
374 				char *buf)
375 {
376 	unsigned long result;
377 	struct ideapad_private *priv = dev_get_drvdata(dev);
378 
379 	if (read_ec_data(priv->adev->handle, VPCCMD_R_CAMERA, &result))
380 		return sprintf(buf, "-1\n");
381 	return sprintf(buf, "%lu\n", result);
382 }
383 
384 static ssize_t store_ideapad_cam(struct device *dev,
385 				 struct device_attribute *attr,
386 				 const char *buf, size_t count)
387 {
388 	int ret, state;
389 	struct ideapad_private *priv = dev_get_drvdata(dev);
390 
391 	if (!count)
392 		return 0;
393 	if (sscanf(buf, "%i", &state) != 1)
394 		return -EINVAL;
395 	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_CAMERA, state);
396 	if (ret < 0)
397 		return -EIO;
398 	return count;
399 }
400 
401 static DEVICE_ATTR(camera_power, 0644, show_ideapad_cam, store_ideapad_cam);
402 
403 static ssize_t show_ideapad_fan(struct device *dev,
404 				struct device_attribute *attr,
405 				char *buf)
406 {
407 	unsigned long result;
408 	struct ideapad_private *priv = dev_get_drvdata(dev);
409 
410 	if (read_ec_data(priv->adev->handle, VPCCMD_R_FAN, &result))
411 		return sprintf(buf, "-1\n");
412 	return sprintf(buf, "%lu\n", result);
413 }
414 
415 static ssize_t store_ideapad_fan(struct device *dev,
416 				 struct device_attribute *attr,
417 				 const char *buf, size_t count)
418 {
419 	int ret, state;
420 	struct ideapad_private *priv = dev_get_drvdata(dev);
421 
422 	if (!count)
423 		return 0;
424 	if (sscanf(buf, "%i", &state) != 1)
425 		return -EINVAL;
426 	if (state < 0 || state > 4 || state == 3)
427 		return -EINVAL;
428 	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_FAN, state);
429 	if (ret < 0)
430 		return -EIO;
431 	return count;
432 }
433 
434 static DEVICE_ATTR(fan_mode, 0644, show_ideapad_fan, store_ideapad_fan);
435 
436 static ssize_t touchpad_show(struct device *dev,
437 			     struct device_attribute *attr,
438 			     char *buf)
439 {
440 	struct ideapad_private *priv = dev_get_drvdata(dev);
441 	unsigned long result;
442 
443 	if (read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &result))
444 		return sprintf(buf, "-1\n");
445 	return sprintf(buf, "%lu\n", result);
446 }
447 
448 /* Switch to RO for now: It might be revisited in the future */
449 static ssize_t __maybe_unused touchpad_store(struct device *dev,
450 					     struct device_attribute *attr,
451 					     const char *buf, size_t count)
452 {
453 	struct ideapad_private *priv = dev_get_drvdata(dev);
454 	bool state;
455 	int ret;
456 
457 	ret = kstrtobool(buf, &state);
458 	if (ret)
459 		return ret;
460 
461 	ret = write_ec_cmd(priv->adev->handle, VPCCMD_W_TOUCHPAD, state);
462 	if (ret < 0)
463 		return -EIO;
464 	return count;
465 }
466 
467 static DEVICE_ATTR_RO(touchpad);
468 
469 static ssize_t conservation_mode_show(struct device *dev,
470 				struct device_attribute *attr,
471 				char *buf)
472 {
473 	struct ideapad_private *priv = dev_get_drvdata(dev);
474 	unsigned long result;
475 
476 	if (method_gbmd(priv->adev->handle, &result))
477 		return sprintf(buf, "-1\n");
478 	return sprintf(buf, "%u\n", test_bit(BM_CONSERVATION_BIT, &result));
479 }
480 
481 static ssize_t conservation_mode_store(struct device *dev,
482 				 struct device_attribute *attr,
483 				 const char *buf, size_t count)
484 {
485 	struct ideapad_private *priv = dev_get_drvdata(dev);
486 	bool state;
487 	int ret;
488 
489 	ret = kstrtobool(buf, &state);
490 	if (ret)
491 		return ret;
492 
493 	ret = method_int1(priv->adev->handle, "SBMC", state ?
494 					      BMCMD_CONSERVATION_ON :
495 					      BMCMD_CONSERVATION_OFF);
496 	if (ret < 0)
497 		return -EIO;
498 	return count;
499 }
500 
501 static DEVICE_ATTR_RW(conservation_mode);
502 
503 static ssize_t fn_lock_show(struct device *dev,
504 			    struct device_attribute *attr,
505 			    char *buf)
506 {
507 	struct ideapad_private *priv = dev_get_drvdata(dev);
508 	unsigned long result;
509 	int hals;
510 	int fail = read_method_int(priv->adev->handle, "HALS", &hals);
511 
512 	if (fail)
513 		return sprintf(buf, "-1\n");
514 
515 	result = hals;
516 	return sprintf(buf, "%u\n", test_bit(HA_FNLOCK_BIT, &result));
517 }
518 
519 static ssize_t fn_lock_store(struct device *dev,
520 			     struct device_attribute *attr,
521 			     const char *buf, size_t count)
522 {
523 	struct ideapad_private *priv = dev_get_drvdata(dev);
524 	bool state;
525 	int ret;
526 
527 	ret = kstrtobool(buf, &state);
528 	if (ret)
529 		return ret;
530 
531 	ret = method_int1(priv->adev->handle, "SALS", state ?
532 			  HACMD_FNLOCK_ON :
533 			  HACMD_FNLOCK_OFF);
534 	if (ret < 0)
535 		return -EIO;
536 	return count;
537 }
538 
539 static DEVICE_ATTR_RW(fn_lock);
540 
541 
542 static struct attribute *ideapad_attributes[] = {
543 	&dev_attr_camera_power.attr,
544 	&dev_attr_fan_mode.attr,
545 	&dev_attr_touchpad.attr,
546 	&dev_attr_conservation_mode.attr,
547 	&dev_attr_fn_lock.attr,
548 	NULL
549 };
550 
551 static umode_t ideapad_is_visible(struct kobject *kobj,
552 				 struct attribute *attr,
553 				 int idx)
554 {
555 	struct device *dev = container_of(kobj, struct device, kobj);
556 	struct ideapad_private *priv = dev_get_drvdata(dev);
557 	bool supported;
558 
559 	if (attr == &dev_attr_camera_power.attr)
560 		supported = test_bit(CFG_CAMERA_BIT, &(priv->cfg));
561 	else if (attr == &dev_attr_fan_mode.attr) {
562 		unsigned long value;
563 		supported = !read_ec_data(priv->adev->handle, VPCCMD_R_FAN,
564 					  &value);
565 	} else if (attr == &dev_attr_conservation_mode.attr) {
566 		supported = acpi_has_method(priv->adev->handle, "GBMD") &&
567 			    acpi_has_method(priv->adev->handle, "SBMC");
568 	} else if (attr == &dev_attr_fn_lock.attr) {
569 		supported = acpi_has_method(priv->adev->handle, "HALS") &&
570 			acpi_has_method(priv->adev->handle, "SALS");
571 	} else
572 		supported = true;
573 
574 	return supported ? attr->mode : 0;
575 }
576 
577 static const struct attribute_group ideapad_attribute_group = {
578 	.is_visible = ideapad_is_visible,
579 	.attrs = ideapad_attributes
580 };
581 
582 /*
583  * Rfkill
584  */
585 struct ideapad_rfk_data {
586 	char *name;
587 	int cfgbit;
588 	int opcode;
589 	int type;
590 };
591 
592 static const struct ideapad_rfk_data ideapad_rfk_data[] = {
593 	{ "ideapad_wlan",    CFG_WIFI_BIT, VPCCMD_W_WIFI, RFKILL_TYPE_WLAN },
594 	{ "ideapad_bluetooth", CFG_BT_BIT, VPCCMD_W_BT, RFKILL_TYPE_BLUETOOTH },
595 	{ "ideapad_3g",        CFG_3G_BIT, VPCCMD_W_3G, RFKILL_TYPE_WWAN },
596 };
597 
598 static int ideapad_rfk_set(void *data, bool blocked)
599 {
600 	struct ideapad_rfk_priv *priv = data;
601 	int opcode = ideapad_rfk_data[priv->dev].opcode;
602 
603 	return write_ec_cmd(priv->priv->adev->handle, opcode, !blocked);
604 }
605 
606 static const struct rfkill_ops ideapad_rfk_ops = {
607 	.set_block = ideapad_rfk_set,
608 };
609 
610 static void ideapad_sync_rfk_state(struct ideapad_private *priv)
611 {
612 	unsigned long hw_blocked = 0;
613 	int i;
614 
615 	if (priv->has_hw_rfkill_switch) {
616 		if (read_ec_data(priv->adev->handle, VPCCMD_R_RF, &hw_blocked))
617 			return;
618 		hw_blocked = !hw_blocked;
619 	}
620 
621 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
622 		if (priv->rfk[i])
623 			rfkill_set_hw_state(priv->rfk[i], hw_blocked);
624 }
625 
626 static int ideapad_register_rfkill(struct ideapad_private *priv, int dev)
627 {
628 	int ret;
629 	unsigned long sw_blocked;
630 
631 	if (no_bt_rfkill &&
632 	    (ideapad_rfk_data[dev].type == RFKILL_TYPE_BLUETOOTH)) {
633 		/* Force to enable bluetooth when no_bt_rfkill=1 */
634 		write_ec_cmd(priv->adev->handle,
635 			     ideapad_rfk_data[dev].opcode, 1);
636 		return 0;
637 	}
638 	priv->rfk_priv[dev].dev = dev;
639 	priv->rfk_priv[dev].priv = priv;
640 
641 	priv->rfk[dev] = rfkill_alloc(ideapad_rfk_data[dev].name,
642 				      &priv->platform_device->dev,
643 				      ideapad_rfk_data[dev].type,
644 				      &ideapad_rfk_ops,
645 				      &priv->rfk_priv[dev]);
646 	if (!priv->rfk[dev])
647 		return -ENOMEM;
648 
649 	if (read_ec_data(priv->adev->handle, ideapad_rfk_data[dev].opcode-1,
650 			 &sw_blocked)) {
651 		rfkill_init_sw_state(priv->rfk[dev], 0);
652 	} else {
653 		sw_blocked = !sw_blocked;
654 		rfkill_init_sw_state(priv->rfk[dev], sw_blocked);
655 	}
656 
657 	ret = rfkill_register(priv->rfk[dev]);
658 	if (ret) {
659 		rfkill_destroy(priv->rfk[dev]);
660 		return ret;
661 	}
662 	return 0;
663 }
664 
665 static void ideapad_unregister_rfkill(struct ideapad_private *priv, int dev)
666 {
667 	if (!priv->rfk[dev])
668 		return;
669 
670 	rfkill_unregister(priv->rfk[dev]);
671 	rfkill_destroy(priv->rfk[dev]);
672 }
673 
674 /*
675  * Platform device
676  */
677 static int ideapad_sysfs_init(struct ideapad_private *priv)
678 {
679 	return sysfs_create_group(&priv->platform_device->dev.kobj,
680 				    &ideapad_attribute_group);
681 }
682 
683 static void ideapad_sysfs_exit(struct ideapad_private *priv)
684 {
685 	sysfs_remove_group(&priv->platform_device->dev.kobj,
686 			   &ideapad_attribute_group);
687 }
688 
689 /*
690  * input device
691  */
692 static const struct key_entry ideapad_keymap[] = {
693 	{ KE_KEY, 6,  { KEY_SWITCHVIDEOMODE } },
694 	{ KE_KEY, 7,  { KEY_CAMERA } },
695 	{ KE_KEY, 8,  { KEY_MICMUTE } },
696 	{ KE_KEY, 11, { KEY_F16 } },
697 	{ KE_KEY, 13, { KEY_WLAN } },
698 	{ KE_KEY, 16, { KEY_PROG1 } },
699 	{ KE_KEY, 17, { KEY_PROG2 } },
700 	{ KE_KEY, 64, { KEY_PROG3 } },
701 	{ KE_KEY, 65, { KEY_PROG4 } },
702 	{ KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
703 	{ KE_KEY, 67, { KEY_TOUCHPAD_ON } },
704 	{ KE_KEY, 128, { KEY_ESC } },
705 
706 	{ KE_END, 0 },
707 };
708 
709 static int ideapad_input_init(struct ideapad_private *priv)
710 {
711 	struct input_dev *inputdev;
712 	int error;
713 
714 	inputdev = input_allocate_device();
715 	if (!inputdev)
716 		return -ENOMEM;
717 
718 	inputdev->name = "Ideapad extra buttons";
719 	inputdev->phys = "ideapad/input0";
720 	inputdev->id.bustype = BUS_HOST;
721 	inputdev->dev.parent = &priv->platform_device->dev;
722 
723 	error = sparse_keymap_setup(inputdev, ideapad_keymap, NULL);
724 	if (error) {
725 		pr_err("Unable to setup input device keymap\n");
726 		goto err_free_dev;
727 	}
728 
729 	error = input_register_device(inputdev);
730 	if (error) {
731 		pr_err("Unable to register input device\n");
732 		goto err_free_dev;
733 	}
734 
735 	priv->inputdev = inputdev;
736 	return 0;
737 
738 err_free_dev:
739 	input_free_device(inputdev);
740 	return error;
741 }
742 
743 static void ideapad_input_exit(struct ideapad_private *priv)
744 {
745 	input_unregister_device(priv->inputdev);
746 	priv->inputdev = NULL;
747 }
748 
749 static void ideapad_input_report(struct ideapad_private *priv,
750 				 unsigned long scancode)
751 {
752 	sparse_keymap_report_event(priv->inputdev, scancode, 1, true);
753 }
754 
755 static void ideapad_input_novokey(struct ideapad_private *priv)
756 {
757 	unsigned long long_pressed;
758 
759 	if (read_ec_data(priv->adev->handle, VPCCMD_R_NOVO, &long_pressed))
760 		return;
761 	if (long_pressed)
762 		ideapad_input_report(priv, 17);
763 	else
764 		ideapad_input_report(priv, 16);
765 }
766 
767 static void ideapad_check_special_buttons(struct ideapad_private *priv)
768 {
769 	unsigned long bit, value;
770 
771 	read_ec_data(priv->adev->handle, VPCCMD_R_SPECIAL_BUTTONS, &value);
772 
773 	for (bit = 0; bit < 16; bit++) {
774 		if (test_bit(bit, &value)) {
775 			switch (bit) {
776 			case 0:	/* Z580 */
777 			case 6:	/* Z570 */
778 				/* Thermal Management button */
779 				ideapad_input_report(priv, 65);
780 				break;
781 			case 1:
782 				/* OneKey Theater button */
783 				ideapad_input_report(priv, 64);
784 				break;
785 			default:
786 				pr_info("Unknown special button: %lu\n", bit);
787 				break;
788 			}
789 		}
790 	}
791 }
792 
793 /*
794  * backlight
795  */
796 static int ideapad_backlight_get_brightness(struct backlight_device *blightdev)
797 {
798 	struct ideapad_private *priv = bl_get_data(blightdev);
799 	unsigned long now;
800 
801 	if (!priv)
802 		return -EINVAL;
803 
804 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
805 		return -EIO;
806 	return now;
807 }
808 
809 static int ideapad_backlight_update_status(struct backlight_device *blightdev)
810 {
811 	struct ideapad_private *priv = bl_get_data(blightdev);
812 
813 	if (!priv)
814 		return -EINVAL;
815 
816 	if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL,
817 			 blightdev->props.brightness))
818 		return -EIO;
819 	if (write_ec_cmd(priv->adev->handle, VPCCMD_W_BL_POWER,
820 			 blightdev->props.power == FB_BLANK_POWERDOWN ? 0 : 1))
821 		return -EIO;
822 
823 	return 0;
824 }
825 
826 static const struct backlight_ops ideapad_backlight_ops = {
827 	.get_brightness = ideapad_backlight_get_brightness,
828 	.update_status = ideapad_backlight_update_status,
829 };
830 
831 static int ideapad_backlight_init(struct ideapad_private *priv)
832 {
833 	struct backlight_device *blightdev;
834 	struct backlight_properties props;
835 	unsigned long max, now, power;
836 
837 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_MAX, &max))
838 		return -EIO;
839 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now))
840 		return -EIO;
841 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
842 		return -EIO;
843 
844 	memset(&props, 0, sizeof(struct backlight_properties));
845 	props.max_brightness = max;
846 	props.type = BACKLIGHT_PLATFORM;
847 	blightdev = backlight_device_register("ideapad",
848 					      &priv->platform_device->dev,
849 					      priv,
850 					      &ideapad_backlight_ops,
851 					      &props);
852 	if (IS_ERR(blightdev)) {
853 		pr_err("Could not register backlight device\n");
854 		return PTR_ERR(blightdev);
855 	}
856 
857 	priv->blightdev = blightdev;
858 	blightdev->props.brightness = now;
859 	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
860 	backlight_update_status(blightdev);
861 
862 	return 0;
863 }
864 
865 static void ideapad_backlight_exit(struct ideapad_private *priv)
866 {
867 	backlight_device_unregister(priv->blightdev);
868 	priv->blightdev = NULL;
869 }
870 
871 static void ideapad_backlight_notify_power(struct ideapad_private *priv)
872 {
873 	unsigned long power;
874 	struct backlight_device *blightdev = priv->blightdev;
875 
876 	if (!blightdev)
877 		return;
878 	if (read_ec_data(priv->adev->handle, VPCCMD_R_BL_POWER, &power))
879 		return;
880 	blightdev->props.power = power ? FB_BLANK_UNBLANK : FB_BLANK_POWERDOWN;
881 }
882 
883 static void ideapad_backlight_notify_brightness(struct ideapad_private *priv)
884 {
885 	unsigned long now;
886 
887 	/* if we control brightness via acpi video driver */
888 	if (priv->blightdev == NULL) {
889 		read_ec_data(priv->adev->handle, VPCCMD_R_BL, &now);
890 		return;
891 	}
892 
893 	backlight_force_update(priv->blightdev, BACKLIGHT_UPDATE_HOTKEY);
894 }
895 
896 /*
897  * module init/exit
898  */
899 static void ideapad_sync_touchpad_state(struct ideapad_private *priv)
900 {
901 	unsigned long value;
902 
903 	/* Without reading from EC touchpad LED doesn't switch state */
904 	if (!read_ec_data(priv->adev->handle, VPCCMD_R_TOUCHPAD, &value)) {
905 		/* Some IdeaPads don't really turn off touchpad - they only
906 		 * switch the LED state. We (de)activate KBC AUX port to turn
907 		 * touchpad off and on. We send KEY_TOUCHPAD_OFF and
908 		 * KEY_TOUCHPAD_ON to not to get out of sync with LED */
909 		unsigned char param;
910 		i8042_command(&param, value ? I8042_CMD_AUX_ENABLE :
911 			      I8042_CMD_AUX_DISABLE);
912 		ideapad_input_report(priv, value ? 67 : 66);
913 	}
914 }
915 
916 static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
917 {
918 	struct ideapad_private *priv = data;
919 	unsigned long vpc1, vpc2, vpc_bit;
920 
921 	if (read_ec_data(handle, VPCCMD_R_VPC1, &vpc1))
922 		return;
923 	if (read_ec_data(handle, VPCCMD_R_VPC2, &vpc2))
924 		return;
925 
926 	vpc1 = (vpc2 << 8) | vpc1;
927 	for (vpc_bit = 0; vpc_bit < 16; vpc_bit++) {
928 		if (test_bit(vpc_bit, &vpc1)) {
929 			switch (vpc_bit) {
930 			case 9:
931 				ideapad_sync_rfk_state(priv);
932 				break;
933 			case 13:
934 			case 11:
935 			case 8:
936 			case 7:
937 			case 6:
938 				ideapad_input_report(priv, vpc_bit);
939 				break;
940 			case 5:
941 				ideapad_sync_touchpad_state(priv);
942 				break;
943 			case 4:
944 				ideapad_backlight_notify_brightness(priv);
945 				break;
946 			case 3:
947 				ideapad_input_novokey(priv);
948 				break;
949 			case 2:
950 				ideapad_backlight_notify_power(priv);
951 				break;
952 			case 0:
953 				ideapad_check_special_buttons(priv);
954 				break;
955 			case 1:
956 				/* Some IdeaPads report event 1 every ~20
957 				 * seconds while on battery power; some
958 				 * report this when changing to/from tablet
959 				 * mode. Squelch this event.
960 				 */
961 				break;
962 			default:
963 				pr_info("Unknown event: %lu\n", vpc_bit);
964 			}
965 		}
966 	}
967 }
968 
969 #if IS_ENABLED(CONFIG_ACPI_WMI)
970 static void ideapad_wmi_notify(u32 value, void *context)
971 {
972 	switch (value) {
973 	case 128:
974 		ideapad_input_report(context, value);
975 		break;
976 	default:
977 		pr_info("Unknown WMI event %u\n", value);
978 	}
979 }
980 #endif
981 
982 /*
983  * Some ideapads don't have a hardware rfkill switch, reading VPCCMD_R_RF
984  * always results in 0 on these models, causing ideapad_laptop to wrongly
985  * report all radios as hardware-blocked.
986  */
987 static const struct dmi_system_id no_hw_rfkill_list[] = {
988 	{
989 		.ident = "Lenovo RESCUER R720-15IKBN",
990 		.matches = {
991 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
992 			DMI_MATCH(DMI_BOARD_NAME, "80WW"),
993 		},
994 	},
995 	{
996 		.ident = "Lenovo G40-30",
997 		.matches = {
998 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
999 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G40-30"),
1000 		},
1001 	},
1002 	{
1003 		.ident = "Lenovo G50-30",
1004 		.matches = {
1005 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1006 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo G50-30"),
1007 		},
1008 	},
1009 	{
1010 		.ident = "Lenovo V310-14IKB",
1011 		.matches = {
1012 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1013 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14IKB"),
1014 		},
1015 	},
1016 	{
1017 		.ident = "Lenovo V310-14ISK",
1018 		.matches = {
1019 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1020 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-14ISK"),
1021 		},
1022 	},
1023 	{
1024 		.ident = "Lenovo V310-15IKB",
1025 		.matches = {
1026 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1027 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15IKB"),
1028 		},
1029 	},
1030 	{
1031 		.ident = "Lenovo V310-15ISK",
1032 		.matches = {
1033 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1034 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V310-15ISK"),
1035 		},
1036 	},
1037 	{
1038 		.ident = "Lenovo V510-15IKB",
1039 		.matches = {
1040 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1041 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo V510-15IKB"),
1042 		},
1043 	},
1044 	{
1045 		.ident = "Lenovo ideapad 300-15IBR",
1046 		.matches = {
1047 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1048 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IBR"),
1049 		},
1050 	},
1051 	{
1052 		.ident = "Lenovo ideapad 300-15IKB",
1053 		.matches = {
1054 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1055 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300-15IKB"),
1056 		},
1057 	},
1058 	{
1059 		.ident = "Lenovo ideapad 300S-11IBR",
1060 		.matches = {
1061 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1062 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 300S-11BR"),
1063 		},
1064 	},
1065 	{
1066 		.ident = "Lenovo ideapad 310-15ABR",
1067 		.matches = {
1068 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1069 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ABR"),
1070 		},
1071 	},
1072 	{
1073 		.ident = "Lenovo ideapad 310-15IAP",
1074 		.matches = {
1075 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1076 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IAP"),
1077 		},
1078 	},
1079 	{
1080 		.ident = "Lenovo ideapad 310-15IKB",
1081 		.matches = {
1082 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1083 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15IKB"),
1084 		},
1085 	},
1086 	{
1087 		.ident = "Lenovo ideapad 310-15ISK",
1088 		.matches = {
1089 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1090 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad 310-15ISK"),
1091 		},
1092 	},
1093 	{
1094 		.ident = "Lenovo ideapad Y700-14ISK",
1095 		.matches = {
1096 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1097 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-14ISK"),
1098 		},
1099 	},
1100 	{
1101 		.ident = "Lenovo ideapad Y700-15ACZ",
1102 		.matches = {
1103 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1104 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ACZ"),
1105 		},
1106 	},
1107 	{
1108 		.ident = "Lenovo ideapad Y700-15ISK",
1109 		.matches = {
1110 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1111 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-15ISK"),
1112 		},
1113 	},
1114 	{
1115 		.ident = "Lenovo ideapad Y700 Touch-15ISK",
1116 		.matches = {
1117 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1118 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700 Touch-15ISK"),
1119 		},
1120 	},
1121 	{
1122 		.ident = "Lenovo ideapad Y700-17ISK",
1123 		.matches = {
1124 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1125 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo ideapad Y700-17ISK"),
1126 		},
1127 	},
1128 	{
1129 		.ident = "Lenovo ideapad MIIX 720-12IKB",
1130 		.matches = {
1131 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1132 			DMI_MATCH(DMI_PRODUCT_VERSION, "MIIX 720-12IKB"),
1133 		},
1134 	},
1135 	{
1136 		.ident = "Lenovo Legion Y520-15IKB",
1137 		.matches = {
1138 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1139 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKB"),
1140 		},
1141 	},
1142 	{
1143 		.ident = "Lenovo Y520-15IKBM",
1144 		.matches = {
1145 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1146 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y520-15IKBM"),
1147 		},
1148 	},
1149 	{
1150 		.ident = "Lenovo Legion Y530-15ICH",
1151 		.matches = {
1152 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1153 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion Y530-15ICH"),
1154 		},
1155 	},
1156 	{
1157 		.ident = "Lenovo Legion Y720-15IKB",
1158 		.matches = {
1159 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1160 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKB"),
1161 		},
1162 	},
1163 	{
1164 		.ident = "Lenovo Legion Y720-15IKBN",
1165 		.matches = {
1166 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1167 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBN"),
1168 		},
1169 	},
1170 	{
1171 		.ident = "Lenovo Y720-15IKBM",
1172 		.matches = {
1173 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1174 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Y720-15IKBM"),
1175 		},
1176 	},
1177 	{
1178 		.ident = "Lenovo Yoga 2 11 / 13 / Pro",
1179 		.matches = {
1180 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1181 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 2"),
1182 		},
1183 	},
1184 	{
1185 		.ident = "Lenovo Yoga 2 11 / 13 / Pro",
1186 		.matches = {
1187 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1188 			DMI_MATCH(DMI_BOARD_NAME, "Yoga2"),
1189 		},
1190 	},
1191 	{
1192 		.ident = "Lenovo Yoga 2 13",
1193 		.matches = {
1194 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1195 			DMI_MATCH(DMI_PRODUCT_VERSION, "Yoga 2 13"),
1196 		},
1197 	},
1198 	{
1199 		.ident = "Lenovo Yoga 3 1170 / 1470",
1200 		.matches = {
1201 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1202 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Yoga 3"),
1203 		},
1204 	},
1205 	{
1206 		.ident = "Lenovo Yoga 3 Pro 1370",
1207 		.matches = {
1208 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1209 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 3"),
1210 		},
1211 	},
1212 	{
1213 		.ident = "Lenovo Yoga 700",
1214 		.matches = {
1215 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1216 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 700"),
1217 		},
1218 	},
1219 	{
1220 		.ident = "Lenovo Yoga 900",
1221 		.matches = {
1222 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1223 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 900"),
1224 		},
1225 	},
1226 	{
1227 		.ident = "Lenovo Yoga 900",
1228 		.matches = {
1229 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1230 			DMI_MATCH(DMI_BOARD_NAME, "VIUU4"),
1231 		},
1232 	},
1233 	{
1234 		.ident = "Lenovo YOGA 910-13IKB",
1235 		.matches = {
1236 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1237 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 910-13IKB"),
1238 		},
1239 	},
1240 	{
1241 		.ident = "Lenovo YOGA 920-13IKB",
1242 		.matches = {
1243 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1244 			DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo YOGA 920-13IKB"),
1245 		},
1246 	},
1247 	{
1248 		.ident = "Lenovo Zhaoyang E42-80",
1249 		.matches = {
1250 			DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
1251 			DMI_MATCH(DMI_PRODUCT_VERSION, "ZHAOYANG E42-80"),
1252 		},
1253 	},
1254 	{}
1255 };
1256 
1257 static int ideapad_acpi_add(struct platform_device *pdev)
1258 {
1259 	int ret, i;
1260 	int cfg;
1261 	struct ideapad_private *priv;
1262 	struct acpi_device *adev;
1263 
1264 	ret = acpi_bus_get_device(ACPI_HANDLE(&pdev->dev), &adev);
1265 	if (ret)
1266 		return -ENODEV;
1267 
1268 	if (read_method_int(adev->handle, "_CFG", &cfg))
1269 		return -ENODEV;
1270 
1271 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
1272 	if (!priv)
1273 		return -ENOMEM;
1274 
1275 	dev_set_drvdata(&pdev->dev, priv);
1276 	priv->cfg = cfg;
1277 	priv->adev = adev;
1278 	priv->platform_device = pdev;
1279 	priv->has_hw_rfkill_switch = !dmi_check_system(no_hw_rfkill_list);
1280 
1281 	ret = ideapad_sysfs_init(priv);
1282 	if (ret)
1283 		return ret;
1284 
1285 	ret = ideapad_debugfs_init(priv);
1286 	if (ret)
1287 		goto debugfs_failed;
1288 
1289 	ret = ideapad_input_init(priv);
1290 	if (ret)
1291 		goto input_failed;
1292 
1293 	/*
1294 	 * On some models without a hw-switch (the yoga 2 13 at least)
1295 	 * VPCCMD_W_RF must be explicitly set to 1 for the wifi to work.
1296 	 */
1297 	if (!priv->has_hw_rfkill_switch)
1298 		write_ec_cmd(priv->adev->handle, VPCCMD_W_RF, 1);
1299 
1300 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1301 		if (test_bit(ideapad_rfk_data[i].cfgbit, &priv->cfg))
1302 			ideapad_register_rfkill(priv, i);
1303 
1304 	ideapad_sync_rfk_state(priv);
1305 	ideapad_sync_touchpad_state(priv);
1306 
1307 	if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
1308 		ret = ideapad_backlight_init(priv);
1309 		if (ret && ret != -ENODEV)
1310 			goto backlight_failed;
1311 	}
1312 	ret = acpi_install_notify_handler(adev->handle,
1313 		ACPI_DEVICE_NOTIFY, ideapad_acpi_notify, priv);
1314 	if (ret)
1315 		goto notification_failed;
1316 
1317 #if IS_ENABLED(CONFIG_ACPI_WMI)
1318 	for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
1319 		ret = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
1320 						 ideapad_wmi_notify, priv);
1321 		if (ret == AE_OK) {
1322 			priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
1323 			break;
1324 		}
1325 	}
1326 	if (ret != AE_OK && ret != AE_NOT_EXIST)
1327 		goto notification_failed_wmi;
1328 #endif
1329 
1330 	return 0;
1331 #if IS_ENABLED(CONFIG_ACPI_WMI)
1332 notification_failed_wmi:
1333 	acpi_remove_notify_handler(priv->adev->handle,
1334 		ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1335 #endif
1336 notification_failed:
1337 	ideapad_backlight_exit(priv);
1338 backlight_failed:
1339 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1340 		ideapad_unregister_rfkill(priv, i);
1341 	ideapad_input_exit(priv);
1342 input_failed:
1343 	ideapad_debugfs_exit(priv);
1344 debugfs_failed:
1345 	ideapad_sysfs_exit(priv);
1346 	return ret;
1347 }
1348 
1349 static int ideapad_acpi_remove(struct platform_device *pdev)
1350 {
1351 	struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
1352 	int i;
1353 
1354 #if IS_ENABLED(CONFIG_ACPI_WMI)
1355 	if (priv->fnesc_guid)
1356 		wmi_remove_notify_handler(priv->fnesc_guid);
1357 #endif
1358 	acpi_remove_notify_handler(priv->adev->handle,
1359 		ACPI_DEVICE_NOTIFY, ideapad_acpi_notify);
1360 	ideapad_backlight_exit(priv);
1361 	for (i = 0; i < IDEAPAD_RFKILL_DEV_NUM; i++)
1362 		ideapad_unregister_rfkill(priv, i);
1363 	ideapad_input_exit(priv);
1364 	ideapad_debugfs_exit(priv);
1365 	ideapad_sysfs_exit(priv);
1366 	dev_set_drvdata(&pdev->dev, NULL);
1367 
1368 	return 0;
1369 }
1370 
1371 #ifdef CONFIG_PM_SLEEP
1372 static int ideapad_acpi_resume(struct device *device)
1373 {
1374 	struct ideapad_private *priv;
1375 
1376 	if (!device)
1377 		return -EINVAL;
1378 	priv = dev_get_drvdata(device);
1379 
1380 	ideapad_sync_rfk_state(priv);
1381 	ideapad_sync_touchpad_state(priv);
1382 	return 0;
1383 }
1384 #endif
1385 static SIMPLE_DEV_PM_OPS(ideapad_pm, NULL, ideapad_acpi_resume);
1386 
1387 static const struct acpi_device_id ideapad_device_ids[] = {
1388 	{ "VPC2004", 0},
1389 	{ "", 0},
1390 };
1391 MODULE_DEVICE_TABLE(acpi, ideapad_device_ids);
1392 
1393 static struct platform_driver ideapad_acpi_driver = {
1394 	.probe = ideapad_acpi_add,
1395 	.remove = ideapad_acpi_remove,
1396 	.driver = {
1397 		.name   = "ideapad_acpi",
1398 		.pm     = &ideapad_pm,
1399 		.acpi_match_table = ACPI_PTR(ideapad_device_ids),
1400 	},
1401 };
1402 
1403 module_platform_driver(ideapad_acpi_driver);
1404 
1405 MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
1406 MODULE_DESCRIPTION("IdeaPad ACPI Extras");
1407 MODULE_LICENSE("GPL");
1408