1	// SPDX-License-Identifier: GPL-2.0-only
2	/*
3	* Driver for Dell laptop extras
4	*
5	* Copyright (c) Red Hat <mjg@redhat.com>
6	* Copyright (c) 2014 Gabriele Mazzotta <gabriele.mzt@gmail.com>
7	* Copyright (c) 2014 Pali Rohár <pali@kernel.org>
8	*
9	* Based on documentation in the libsmbios package:
10	* Copyright (C) 2005-2014 Dell Inc.
11	*/
12
13	#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
14
15	#include <linux/module.h>
16	#include <linux/kernel.h>
17	#include <linux/init.h>
18	#include <linux/platform_device.h>
19	#include <linux/backlight.h>
20	#include <linux/err.h>
21	#include <linux/dmi.h>
22	#include <linux/io.h>
23	#include <linux/rfkill.h>
24	#include <linux/power_supply.h>
25	#include <linux/acpi.h>
26	#include <linux/mm.h>
27	#include <linux/i8042.h>
28	#include <linux/debugfs.h>
29	#include <linux/seq_file.h>
30	#include <acpi/video.h>
31	#include "dell-rbtn.h"
32	#include "dell-smbios.h"
33
34	#include "dell-wmi-privacy.h"
35
36	struct quirk_entry {
37	bool touchpad_led;
38	bool kbd_led_not_present;
39	bool kbd_led_levels_off_1;
40	bool kbd_missing_ac_tag;
41
42	bool needs_kbd_timeouts;
43	/*
44	* Ordered list of timeouts expressed in seconds.
45	* The list must end with -1
46	*/
47	int kbd_timeouts[];
48	};
49
50	static struct quirk_entry *quirks;
51
52	static struct quirk_entry quirk_dell_vostro_v130 = {
53	.touchpad_led = true,
54	};
55
56	static int __init dmi_matched(const struct dmi_system_id *dmi)
57	{
58	quirks = dmi->driver_data;
59	return 1;
60	}
61
62	/*
63	* These values come from Windows utility provided by Dell. If any other value
64	* is used then BIOS silently set timeout to 0 without any error message.
65	*/
66	static struct quirk_entry quirk_dell_xps13_9333 = {
67	.needs_kbd_timeouts = true,
68	.kbd_timeouts = { 0, 5, 15, 60, 5 * 60, 15 * 60, -1 },
69	};
70
71	static struct quirk_entry quirk_dell_xps13_9370 = {
72	.kbd_missing_ac_tag = true,
73	};
74
75	static struct quirk_entry quirk_dell_latitude_e6410 = {
76	.kbd_led_levels_off_1 = true,
77	};
78
79	static struct quirk_entry quirk_dell_inspiron_1012 = {
80	.kbd_led_not_present = true,
81	};
82
83	static struct quirk_entry quirk_dell_latitude_7520 = {
84	.kbd_missing_ac_tag = true,
85	};
86
87	static struct platform_driver platform_driver = {
88	.driver = {
89	.name = "dell-laptop",
90	}
91	};
92
93	static struct platform_device *platform_device;
94	static struct backlight_device *dell_backlight_device;
95	static struct rfkill *wifi_rfkill;
96	static struct rfkill *bluetooth_rfkill;
97	static struct rfkill *wwan_rfkill;
98	static bool force_rfkill;
99	static bool micmute_led_registered;
100	static bool mute_led_registered;
101
102	module_param(force_rfkill, bool, 0444);
103	MODULE_PARM_DESC(force_rfkill, "enable rfkill on non whitelisted models");
104
105	static const struct dmi_system_id dell_device_table[] __initconst = {
106	{
107	.ident = "Dell laptop",
108	.matches = {
109	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
110	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
111	},
112	},
113	{
114	.matches = {
115	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
116	DMI_MATCH(DMI_CHASSIS_TYPE, "9"), /*Laptop*/
117	},
118	},
119	{
120	.matches = {
121	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
122	DMI_MATCH(DMI_CHASSIS_TYPE, "10"), /*Notebook*/
123	},
124	},
125	{
126	.matches = {
127	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
128	DMI_MATCH(DMI_CHASSIS_TYPE, "30"), /*Tablet*/
129	},
130	},
131	{
132	.matches = {
133	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
134	DMI_MATCH(DMI_CHASSIS_TYPE, "31"), /*Convertible*/
135	},
136	},
137	{
138	.matches = {
139	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
140	DMI_MATCH(DMI_CHASSIS_TYPE, "32"), /*Detachable*/
141	},
142	},
143	{
144	.ident = "Dell Computer Corporation",
145	.matches = {
146	DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
147	DMI_MATCH(DMI_CHASSIS_TYPE, "8"),
148	},
149	},
150	{ }
151	};
152	MODULE_DEVICE_TABLE(dmi, dell_device_table);
153
154	static const struct dmi_system_id dell_quirks[] __initconst = {
155	{
156	.callback = dmi_matched,
157	.ident = "Dell Vostro V130",
158	.matches = {
159	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
160	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V130"),
161	},
162	.driver_data = &quirk_dell_vostro_v130,
163	},
164	{
165	.callback = dmi_matched,
166	.ident = "Dell Vostro V131",
167	.matches = {
168	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
169	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro V131"),
170	},
171	.driver_data = &quirk_dell_vostro_v130,
172	},
173	{
174	.callback = dmi_matched,
175	.ident = "Dell Vostro 3350",
176	.matches = {
177	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
178	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3350"),
179	},
180	.driver_data = &quirk_dell_vostro_v130,
181	},
182	{
183	.callback = dmi_matched,
184	.ident = "Dell Vostro 3555",
185	.matches = {
186	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
187	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3555"),
188	},
189	.driver_data = &quirk_dell_vostro_v130,
190	},
191	{
192	.callback = dmi_matched,
193	.ident = "Dell Inspiron N311z",
194	.matches = {
195	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
196	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron N311z"),
197	},
198	.driver_data = &quirk_dell_vostro_v130,
199	},
200	{
201	.callback = dmi_matched,
202	.ident = "Dell Inspiron M5110",
203	.matches = {
204	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
205	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron M5110"),
206	},
207	.driver_data = &quirk_dell_vostro_v130,
208	},
209	{
210	.callback = dmi_matched,
211	.ident = "Dell Vostro 3360",
212	.matches = {
213	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
214	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3360"),
215	},
216	.driver_data = &quirk_dell_vostro_v130,
217	},
218	{
219	.callback = dmi_matched,
220	.ident = "Dell Vostro 3460",
221	.matches = {
222	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
223	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3460"),
224	},
225	.driver_data = &quirk_dell_vostro_v130,
226	},
227	{
228	.callback = dmi_matched,
229	.ident = "Dell Vostro 3560",
230	.matches = {
231	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
232	DMI_MATCH(DMI_PRODUCT_NAME, "Vostro 3560"),
233	},
234	.driver_data = &quirk_dell_vostro_v130,
235	},
236	{
237	.callback = dmi_matched,
238	.ident = "Dell Vostro 3450",
239	.matches = {
240	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
241	DMI_MATCH(DMI_PRODUCT_NAME, "Dell System Vostro 3450"),
242	},
243	.driver_data = &quirk_dell_vostro_v130,
244	},
245	{
246	.callback = dmi_matched,
247	.ident = "Dell Inspiron 5420",
248	.matches = {
249	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
250	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5420"),
251	},
252	.driver_data = &quirk_dell_vostro_v130,
253	},
254	{
255	.callback = dmi_matched,
256	.ident = "Dell Inspiron 5520",
257	.matches = {
258	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
259	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5520"),
260	},
261	.driver_data = &quirk_dell_vostro_v130,
262	},
263	{
264	.callback = dmi_matched,
265	.ident = "Dell Inspiron 5720",
266	.matches = {
267	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
268	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 5720"),
269	},
270	.driver_data = &quirk_dell_vostro_v130,
271	},
272	{
273	.callback = dmi_matched,
274	.ident = "Dell Inspiron 7420",
275	.matches = {
276	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
277	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7420"),
278	},
279	.driver_data = &quirk_dell_vostro_v130,
280	},
281	{
282	.callback = dmi_matched,
283	.ident = "Dell Inspiron 7520",
284	.matches = {
285	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
286	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7520"),
287	},
288	.driver_data = &quirk_dell_vostro_v130,
289	},
290	{
291	.callback = dmi_matched,
292	.ident = "Dell Inspiron 7720",
293	.matches = {
294	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
295	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 7720"),
296	},
297	.driver_data = &quirk_dell_vostro_v130,
298	},
299	{
300	.callback = dmi_matched,
301	.ident = "Dell XPS13 9333",
302	.matches = {
303	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
304	DMI_MATCH(DMI_PRODUCT_NAME, "XPS13 9333"),
305	},
306	.driver_data = &quirk_dell_xps13_9333,
307	},
308	{
309	.callback = dmi_matched,
310	.ident = "Dell XPS 13 9370",
311	.matches = {
312	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
313	DMI_MATCH(DMI_PRODUCT_NAME, "XPS 13 9370"),
314	},
315	.driver_data = &quirk_dell_xps13_9370,
316	},
317	{
318	.callback = dmi_matched,
319	.ident = "Dell Latitude E6410",
320	.matches = {
321	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
322	DMI_MATCH(DMI_PRODUCT_NAME, "Latitude E6410"),
323	},
324	.driver_data = &quirk_dell_latitude_e6410,
325	},
326	{
327	.callback = dmi_matched,
328	.ident = "Dell Inspiron 1012",
329	.matches = {
330	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
331	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1012"),
332	},
333	.driver_data = &quirk_dell_inspiron_1012,
334	},
335	{
336	.callback = dmi_matched,
337	.ident = "Dell Inspiron 1018",
338	.matches = {
339	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
340	DMI_MATCH(DMI_PRODUCT_NAME, "Inspiron 1018"),
341	},
342	.driver_data = &quirk_dell_inspiron_1012,
343	},
344	{
345	.callback = dmi_matched,
346	.ident = "Dell Latitude 7520",
347	.matches = {
348	DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
349	DMI_MATCH(DMI_PRODUCT_NAME, "Latitude 7520"),
350	},
351	.driver_data = &quirk_dell_latitude_7520,
352	},
353	{ }
354	};
355
356	static void dell_fill_request(struct calling_interface_buffer *buffer,
357	u32 arg0, u32 arg1, u32 arg2, u32 arg3)
358	{
359	memset(buffer, 0, sizeof(struct calling_interface_buffer));
360	buffer->input[0] = arg0;
361	buffer->input[1] = arg1;
362	buffer->input[2] = arg2;
363	buffer->input[3] = arg3;
364	}
365
366	static int dell_send_request(struct calling_interface_buffer *buffer,
367	u16 class, u16 select)
368	{
369	int ret;
370
371	buffer->cmd_class = class;
372	buffer->cmd_select = select;
373	ret = dell_smbios_call(buffer);
374	if (ret != 0)
375	return ret;
376	return dell_smbios_error(value: buffer->output[0]);
377	}
378
379	/*
380	* Derived from information in smbios-wireless-ctl:
381	*
382	* cbSelect 17, Value 11
383	*
384	* Return Wireless Info
385	* cbArg1, byte0 = 0x00
386	*
387	* cbRes1 Standard return codes (0, -1, -2)
388	* cbRes2 Info bit flags:
389	*
390	* 0 Hardware switch supported (1)
391	* 1 WiFi locator supported (1)
392	* 2 WLAN supported (1)
393	* 3 Bluetooth (BT) supported (1)
394	* 4 WWAN supported (1)
395	* 5 Wireless KBD supported (1)
396	* 6 Uw b supported (1)
397	* 7 WiGig supported (1)
398	* 8 WLAN installed (1)
399	* 9 BT installed (1)
400	* 10 WWAN installed (1)
401	* 11 Uw b installed (1)
402	* 12 WiGig installed (1)
403	* 13-15 Reserved (0)
404	* 16 Hardware (HW) switch is On (1)
405	* 17 WLAN disabled (1)
406	* 18 BT disabled (1)
407	* 19 WWAN disabled (1)
408	* 20 Uw b disabled (1)
409	* 21 WiGig disabled (1)
410	* 20-31 Reserved (0)
411	*
412	* cbRes3 NVRAM size in bytes
413	* cbRes4, byte 0 NVRAM format version number
414	*
415	*
416	* Set QuickSet Radio Disable Flag
417	* cbArg1, byte0 = 0x01
418	* cbArg1, byte1
419	* Radio ID value:
420	* 0 Radio Status
421	* 1 WLAN ID
422	* 2 BT ID
423	* 3 WWAN ID
424	* 4 UWB ID
425	* 5 WIGIG ID
426	* cbArg1, byte2 Flag bits:
427	* 0 QuickSet disables radio (1)
428	* 1-7 Reserved (0)
429	*
430	* cbRes1 Standard return codes (0, -1, -2)
431	* cbRes2 QuickSet (QS) radio disable bit map:
432	* 0 QS disables WLAN
433	* 1 QS disables BT
434	* 2 QS disables WWAN
435	* 3 QS disables UWB
436	* 4 QS disables WIGIG
437	* 5-31 Reserved (0)
438	*
439	* Wireless Switch Configuration
440	* cbArg1, byte0 = 0x02
441	*
442	* cbArg1, byte1
443	* Subcommand:
444	* 0 Get config
445	* 1 Set config
446	* 2 Set WiFi locator enable/disable
447	* cbArg1,byte2
448	* Switch settings (if byte 1==1):
449	* 0 WLAN sw itch control (1)
450	* 1 BT sw itch control (1)
451	* 2 WWAN sw itch control (1)
452	* 3 UWB sw itch control (1)
453	* 4 WiGig sw itch control (1)
454	* 5-7 Reserved (0)
455	* cbArg1, byte2 Enable bits (if byte 1==2):
456	* 0 Enable WiFi locator (1)
457	*
458	* cbRes1 Standard return codes (0, -1, -2)
459	* cbRes2 QuickSet radio disable bit map:
460	* 0 WLAN controlled by sw itch (1)
461	* 1 BT controlled by sw itch (1)
462	* 2 WWAN controlled by sw itch (1)
463	* 3 UWB controlled by sw itch (1)
464	* 4 WiGig controlled by sw itch (1)
465	* 5-6 Reserved (0)
466	* 7 Wireless sw itch config locked (1)
467	* 8 WiFi locator enabled (1)
468	* 9-14 Reserved (0)
469	* 15 WiFi locator setting locked (1)
470	* 16-31 Reserved (0)
471	*
472	* Read Local Config Data (LCD)
473	* cbArg1, byte0 = 0x10
474	* cbArg1, byte1 NVRAM index low byte
475	* cbArg1, byte2 NVRAM index high byte
476	* cbRes1 Standard return codes (0, -1, -2)
477	* cbRes2 4 bytes read from LCD[index]
478	* cbRes3 4 bytes read from LCD[index+4]
479	* cbRes4 4 bytes read from LCD[index+8]
480	*
481	* Write Local Config Data (LCD)
482	* cbArg1, byte0 = 0x11
483	* cbArg1, byte1 NVRAM index low byte
484	* cbArg1, byte2 NVRAM index high byte
485	* cbArg2 4 bytes to w rite at LCD[index]
486	* cbArg3 4 bytes to w rite at LCD[index+4]
487	* cbArg4 4 bytes to w rite at LCD[index+8]
488	* cbRes1 Standard return codes (0, -1, -2)
489	*
490	* Populate Local Config Data from NVRAM
491	* cbArg1, byte0 = 0x12
492	* cbRes1 Standard return codes (0, -1, -2)
493	*
494	* Commit Local Config Data to NVRAM
495	* cbArg1, byte0 = 0x13
496	* cbRes1 Standard return codes (0, -1, -2)
497	*/
498
499	static int dell_rfkill_set(void *data, bool blocked)
500	{
501	int disable = blocked ? 1 : 0;
502	unsigned long radio = (unsigned long)data;
503	int hwswitch_bit = (unsigned long)data - 1;
504	struct calling_interface_buffer buffer;
505	int hwswitch;
506	int status;
507	int ret;
508
509	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
510	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
511	if (ret)
512	return ret;
513	status = buffer.output[1];
514
515	dell_fill_request(buffer: &buffer, arg0: 0x2, arg1: 0, arg2: 0, arg3: 0);
516	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
517	if (ret)
518	return ret;
519	hwswitch = buffer.output[1];
520
521	/* If the hardware switch controls this radio, and the hardware
522	switch is disabled, always disable the radio */
523	if (ret == 0 && (hwswitch & BIT(hwswitch_bit)) &&
524	(status & BIT(0)) && !(status & BIT(16)))
525	disable = 1;
526
527	dell_fill_request(buffer: &buffer, arg0: 1 | (radio<<8) | (disable << 16), arg1: 0, arg2: 0, arg3: 0);
528	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
529	return ret;
530	}
531
532	static void dell_rfkill_update_sw_state(struct rfkill *rfkill, int radio,
533	int status)
534	{
535	if (status & BIT(0)) {
536	/* Has hw-switch, sync sw_state to BIOS */
537	struct calling_interface_buffer buffer;
538	int block = rfkill_blocked(rfkill);
539	dell_fill_request(buffer: &buffer,
540	arg0: 1 | (radio << 8) | (block << 16), arg1: 0, arg2: 0, arg3: 0);
541	dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
542	} else {
543	/* No hw-switch, sync BIOS state to sw_state */
544	rfkill_set_sw_state(rfkill, blocked: !!(status & BIT(radio + 16)));
545	}
546	}
547
548	static void dell_rfkill_update_hw_state(struct rfkill *rfkill, int radio,
549	int status, int hwswitch)
550	{
551	if (hwswitch & (BIT(radio - 1)))
552	rfkill_set_hw_state(rfkill, blocked: !(status & BIT(16)));
553	}
554
555	static void dell_rfkill_query(struct rfkill *rfkill, void *data)
556	{
557	int radio = ((unsigned long)data & 0xF);
558	struct calling_interface_buffer buffer;
559	int hwswitch;
560	int status;
561	int ret;
562
563	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
564	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
565	status = buffer.output[1];
566
567	if (ret != 0 || !(status & BIT(0))) {
568	return;
569	}
570
571	dell_fill_request(buffer: &buffer, arg0: 0x2, arg1: 0, arg2: 0, arg3: 0);
572	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
573	hwswitch = buffer.output[1];
574
575	if (ret != 0)
576	return;
577
578	dell_rfkill_update_hw_state(rfkill, radio, status, hwswitch);
579	}
580
581	static const struct rfkill_ops dell_rfkill_ops = {
582	.set_block = dell_rfkill_set,
583	.query = dell_rfkill_query,
584	};
585
586	static struct dentry *dell_laptop_dir;
587
588	static int dell_debugfs_show(struct seq_file *s, void *data)
589	{
590	struct calling_interface_buffer buffer;
591	int hwswitch_state;
592	int hwswitch_ret;
593	int status;
594	int ret;
595
596	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
597	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
598	if (ret)
599	return ret;
600	status = buffer.output[1];
601
602	dell_fill_request(buffer: &buffer, arg0: 0x2, arg1: 0, arg2: 0, arg3: 0);
603	hwswitch_ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
604	if (hwswitch_ret)
605	return hwswitch_ret;
606	hwswitch_state = buffer.output[1];
607
608	seq_printf(m: s, fmt: "return:\t%d\n", ret);
609	seq_printf(m: s, fmt: "status:\t0x%X\n", status);
610	seq_printf(m: s, fmt: "Bit 0 : Hardware switch supported: %lu\n",
611	status & BIT(0));
612	seq_printf(m: s, fmt: "Bit 1 : Wifi locator supported: %lu\n",
613	(status & BIT(1)) >> 1);
614	seq_printf(m: s, fmt: "Bit 2 : Wifi is supported: %lu\n",
615	(status & BIT(2)) >> 2);
616	seq_printf(m: s, fmt: "Bit 3 : Bluetooth is supported: %lu\n",
617	(status & BIT(3)) >> 3);
618	seq_printf(m: s, fmt: "Bit 4 : WWAN is supported: %lu\n",
619	(status & BIT(4)) >> 4);
620	seq_printf(m: s, fmt: "Bit 5 : Wireless keyboard supported: %lu\n",
621	(status & BIT(5)) >> 5);
622	seq_printf(m: s, fmt: "Bit 6 : UWB supported: %lu\n",
623	(status & BIT(6)) >> 6);
624	seq_printf(m: s, fmt: "Bit 7 : WiGig supported: %lu\n",
625	(status & BIT(7)) >> 7);
626	seq_printf(m: s, fmt: "Bit 8 : Wifi is installed: %lu\n",
627	(status & BIT(8)) >> 8);
628	seq_printf(m: s, fmt: "Bit 9 : Bluetooth is installed: %lu\n",
629	(status & BIT(9)) >> 9);
630	seq_printf(m: s, fmt: "Bit 10: WWAN is installed: %lu\n",
631	(status & BIT(10)) >> 10);
632	seq_printf(m: s, fmt: "Bit 11: UWB installed: %lu\n",
633	(status & BIT(11)) >> 11);
634	seq_printf(m: s, fmt: "Bit 12: WiGig installed: %lu\n",
635	(status & BIT(12)) >> 12);
636
637	seq_printf(m: s, fmt: "Bit 16: Hardware switch is on: %lu\n",
638	(status & BIT(16)) >> 16);
639	seq_printf(m: s, fmt: "Bit 17: Wifi is blocked: %lu\n",
640	(status & BIT(17)) >> 17);
641	seq_printf(m: s, fmt: "Bit 18: Bluetooth is blocked: %lu\n",
642	(status & BIT(18)) >> 18);
643	seq_printf(m: s, fmt: "Bit 19: WWAN is blocked: %lu\n",
644	(status & BIT(19)) >> 19);
645	seq_printf(m: s, fmt: "Bit 20: UWB is blocked: %lu\n",
646	(status & BIT(20)) >> 20);
647	seq_printf(m: s, fmt: "Bit 21: WiGig is blocked: %lu\n",
648	(status & BIT(21)) >> 21);
649
650	seq_printf(m: s, fmt: "\nhwswitch_return:\t%d\n", hwswitch_ret);
651	seq_printf(m: s, fmt: "hwswitch_state:\t0x%X\n", hwswitch_state);
652	seq_printf(m: s, fmt: "Bit 0 : Wifi controlled by switch: %lu\n",
653	hwswitch_state & BIT(0));
654	seq_printf(m: s, fmt: "Bit 1 : Bluetooth controlled by switch: %lu\n",
655	(hwswitch_state & BIT(1)) >> 1);
656	seq_printf(m: s, fmt: "Bit 2 : WWAN controlled by switch: %lu\n",
657	(hwswitch_state & BIT(2)) >> 2);
658	seq_printf(m: s, fmt: "Bit 3 : UWB controlled by switch: %lu\n",
659	(hwswitch_state & BIT(3)) >> 3);
660	seq_printf(m: s, fmt: "Bit 4 : WiGig controlled by switch: %lu\n",
661	(hwswitch_state & BIT(4)) >> 4);
662	seq_printf(m: s, fmt: "Bit 7 : Wireless switch config locked: %lu\n",
663	(hwswitch_state & BIT(7)) >> 7);
664	seq_printf(m: s, fmt: "Bit 8 : Wifi locator enabled: %lu\n",
665	(hwswitch_state & BIT(8)) >> 8);
666	seq_printf(m: s, fmt: "Bit 15: Wifi locator setting locked: %lu\n",
667	(hwswitch_state & BIT(15)) >> 15);
668
669	return 0;
670	}
671	DEFINE_SHOW_ATTRIBUTE(dell_debugfs);
672
673	static void dell_update_rfkill(struct work_struct *ignored)
674	{
675	struct calling_interface_buffer buffer;
676	int hwswitch = 0;
677	int status;
678	int ret;
679
680	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
681	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
682	status = buffer.output[1];
683
684	if (ret != 0)
685	return;
686
687	dell_fill_request(buffer: &buffer, arg0: 0x2, arg1: 0, arg2: 0, arg3: 0);
688	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
689
690	if (ret == 0 && (status & BIT(0)))
691	hwswitch = buffer.output[1];
692
693	if (wifi_rfkill) {
694	dell_rfkill_update_hw_state(rfkill: wifi_rfkill, radio: 1, status, hwswitch);
695	dell_rfkill_update_sw_state(rfkill: wifi_rfkill, radio: 1, status);
696	}
697	if (bluetooth_rfkill) {
698	dell_rfkill_update_hw_state(rfkill: bluetooth_rfkill, radio: 2, status,
699	hwswitch);
700	dell_rfkill_update_sw_state(rfkill: bluetooth_rfkill, radio: 2, status);
701	}
702	if (wwan_rfkill) {
703	dell_rfkill_update_hw_state(rfkill: wwan_rfkill, radio: 3, status, hwswitch);
704	dell_rfkill_update_sw_state(rfkill: wwan_rfkill, radio: 3, status);
705	}
706	}
707	static DECLARE_DELAYED_WORK(dell_rfkill_work, dell_update_rfkill);
708
709	static bool dell_laptop_i8042_filter(unsigned char data, unsigned char str,
710	struct serio *port)
711	{
712	static bool extended;
713
714	if (str & I8042_STR_AUXDATA)
715	return false;
716
717	if (unlikely(data == 0xe0)) {
718	extended = true;
719	return false;
720	} else if (unlikely(extended)) {
721	switch (data) {
722	case 0x8:
723	schedule_delayed_work(dwork: &dell_rfkill_work,
724	delay: round_jiffies_relative(HZ / 4));
725	break;
726	}
727	extended = false;
728	}
729
730	return false;
731	}
732
733	static int (*dell_rbtn_notifier_register_func)(struct notifier_block *);
734	static int (*dell_rbtn_notifier_unregister_func)(struct notifier_block *);
735
736	static int dell_laptop_rbtn_notifier_call(struct notifier_block *nb,
737	unsigned long action, void *data)
738	{
739	schedule_delayed_work(dwork: &dell_rfkill_work, delay: 0);
740	return NOTIFY_OK;
741	}
742
743	static struct notifier_block dell_laptop_rbtn_notifier = {
744	.notifier_call = dell_laptop_rbtn_notifier_call,
745	};
746
747	static int __init dell_setup_rfkill(void)
748	{
749	struct calling_interface_buffer buffer;
750	int status, ret, whitelisted;
751	const char *product;
752
753	/*
754	* rfkill support causes trouble on various models, mostly Inspirons.
755	* So we whitelist certain series, and don't support rfkill on others.
756	*/
757	whitelisted = 0;
758	product = dmi_get_system_info(field: DMI_PRODUCT_NAME);
759	if (product && (strncmp(product, "Latitude", 8) == 0 ||
760	strncmp(product, "Precision", 9) == 0))
761	whitelisted = 1;
762	if (!force_rfkill && !whitelisted)
763	return 0;
764
765	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
766	ret = dell_send_request(buffer: &buffer, CLASS_INFO, SELECT_RFKILL);
767	status = buffer.output[1];
768
769	/* dell wireless info smbios call is not supported */
770	if (ret != 0)
771	return 0;
772
773	/* rfkill is only tested on laptops with a hwswitch */
774	if (!(status & BIT(0)) && !force_rfkill)
775	return 0;
776
777	if ((status & (1<<2|1<<8)) == (1<<2|1<<8)) {
778	wifi_rfkill = rfkill_alloc(name: "dell-wifi", parent: &platform_device->dev,
779	type: RFKILL_TYPE_WLAN,
780	ops: &dell_rfkill_ops, ops_data: (void *) 1);
781	if (!wifi_rfkill) {
782	ret = -ENOMEM;
783	goto err_wifi;
784	}
785	ret = rfkill_register(rfkill: wifi_rfkill);
786	if (ret)
787	goto err_wifi;
788	}
789
790	if ((status & (1<<3|1<<9)) == (1<<3|1<<9)) {
791	bluetooth_rfkill = rfkill_alloc(name: "dell-bluetooth",
792	parent: &platform_device->dev,
793	type: RFKILL_TYPE_BLUETOOTH,
794	ops: &dell_rfkill_ops, ops_data: (void *) 2);
795	if (!bluetooth_rfkill) {
796	ret = -ENOMEM;
797	goto err_bluetooth;
798	}
799	ret = rfkill_register(rfkill: bluetooth_rfkill);
800	if (ret)
801	goto err_bluetooth;
802	}
803
804	if ((status & (1<<4|1<<10)) == (1<<4|1<<10)) {
805	wwan_rfkill = rfkill_alloc(name: "dell-wwan",
806	parent: &platform_device->dev,
807	type: RFKILL_TYPE_WWAN,
808	ops: &dell_rfkill_ops, ops_data: (void *) 3);
809	if (!wwan_rfkill) {
810	ret = -ENOMEM;
811	goto err_wwan;
812	}
813	ret = rfkill_register(rfkill: wwan_rfkill);
814	if (ret)
815	goto err_wwan;
816	}
817
818	/*
819	* Dell Airplane Mode Switch driver (dell-rbtn) supports ACPI devices
820	* which can receive events from HW slider switch.
821	*
822	* Dell SMBIOS on whitelisted models supports controlling radio devices
823	* but does not support receiving HW button switch events. We can use
824	* i8042 filter hook function to receive keyboard data and handle
825	* keycode for HW button.
826	*
827	* So if it is possible we will use Dell Airplane Mode Switch ACPI
828	* driver for receiving HW events and Dell SMBIOS for setting rfkill
829	* states. If ACPI driver or device is not available we will fallback to
830	* i8042 filter hook function.
831	*
832	* To prevent duplicate rfkill devices which control and do same thing,
833	* dell-rbtn driver will automatically remove its own rfkill devices
834	* once function dell_rbtn_notifier_register() is called.
835	*/
836
837	dell_rbtn_notifier_register_func =
838	symbol_request(dell_rbtn_notifier_register);
839	if (dell_rbtn_notifier_register_func) {
840	dell_rbtn_notifier_unregister_func =
841	symbol_request(dell_rbtn_notifier_unregister);
842	if (!dell_rbtn_notifier_unregister_func) {
843	symbol_put(dell_rbtn_notifier_register);
844	dell_rbtn_notifier_register_func = NULL;
845	}
846	}
847
848	if (dell_rbtn_notifier_register_func) {
849	ret = dell_rbtn_notifier_register_func(
850	&dell_laptop_rbtn_notifier);
851	symbol_put(dell_rbtn_notifier_register);
852	dell_rbtn_notifier_register_func = NULL;
853	if (ret != 0) {
854	symbol_put(dell_rbtn_notifier_unregister);
855	dell_rbtn_notifier_unregister_func = NULL;
856	}
857	} else {
858	pr_info("Symbols from dell-rbtn acpi driver are not available\n");
859	ret = -ENODEV;
860	}
861
862	if (ret == 0) {
863	pr_info("Using dell-rbtn acpi driver for receiving events\n");
864	} else if (ret != -ENODEV) {
865	pr_warn("Unable to register dell rbtn notifier\n");
866	goto err_filter;
867	} else {
868	ret = i8042_install_filter(filter: dell_laptop_i8042_filter);
869	if (ret) {
870	pr_warn("Unable to install key filter\n");
871	goto err_filter;
872	}
873	pr_info("Using i8042 filter function for receiving events\n");
874	}
875
876	return 0;
877	err_filter:
878	if (wwan_rfkill)
879	rfkill_unregister(rfkill: wwan_rfkill);
880	err_wwan:
881	rfkill_destroy(rfkill: wwan_rfkill);
882	if (bluetooth_rfkill)
883	rfkill_unregister(rfkill: bluetooth_rfkill);
884	err_bluetooth:
885	rfkill_destroy(rfkill: bluetooth_rfkill);
886	if (wifi_rfkill)
887	rfkill_unregister(rfkill: wifi_rfkill);
888	err_wifi:
889	rfkill_destroy(rfkill: wifi_rfkill);
890
891	return ret;
892	}
893
894	static void dell_cleanup_rfkill(void)
895	{
896	if (dell_rbtn_notifier_unregister_func) {
897	dell_rbtn_notifier_unregister_func(&dell_laptop_rbtn_notifier);
898	symbol_put(dell_rbtn_notifier_unregister);
899	dell_rbtn_notifier_unregister_func = NULL;
900	} else {
901	i8042_remove_filter(filter: dell_laptop_i8042_filter);
902	}
903	cancel_delayed_work_sync(dwork: &dell_rfkill_work);
904	if (wifi_rfkill) {
905	rfkill_unregister(rfkill: wifi_rfkill);
906	rfkill_destroy(rfkill: wifi_rfkill);
907	}
908	if (bluetooth_rfkill) {
909	rfkill_unregister(rfkill: bluetooth_rfkill);
910	rfkill_destroy(rfkill: bluetooth_rfkill);
911	}
912	if (wwan_rfkill) {
913	rfkill_unregister(rfkill: wwan_rfkill);
914	rfkill_destroy(rfkill: wwan_rfkill);
915	}
916	}
917
918	static int dell_send_intensity(struct backlight_device *bd)
919	{
920	struct calling_interface_buffer buffer;
921	struct calling_interface_token *token;
922	int ret;
923
924	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
925	if (!token)
926	return -ENODEV;
927
928	dell_fill_request(buffer: &buffer,
929	arg0: token->location, arg1: bd->props.brightness, arg2: 0, arg3: 0);
930	if (power_supply_is_system_supplied() > 0)
931	ret = dell_send_request(buffer: &buffer,
932	CLASS_TOKEN_WRITE, SELECT_TOKEN_AC);
933	else
934	ret = dell_send_request(buffer: &buffer,
935	CLASS_TOKEN_WRITE, SELECT_TOKEN_BAT);
936
937	return ret;
938	}
939
940	static int dell_get_intensity(struct backlight_device *bd)
941	{
942	struct calling_interface_buffer buffer;
943	struct calling_interface_token *token;
944	int ret;
945
946	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
947	if (!token)
948	return -ENODEV;
949
950	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: 0, arg2: 0, arg3: 0);
951	if (power_supply_is_system_supplied() > 0)
952	ret = dell_send_request(buffer: &buffer,
953	CLASS_TOKEN_READ, SELECT_TOKEN_AC);
954	else
955	ret = dell_send_request(buffer: &buffer,
956	CLASS_TOKEN_READ, SELECT_TOKEN_BAT);
957
958	if (ret == 0)
959	ret = buffer.output[1];
960
961	return ret;
962	}
963
964	static const struct backlight_ops dell_ops = {
965	.get_brightness = dell_get_intensity,
966	.update_status = dell_send_intensity,
967	};
968
969	static void touchpad_led_on(void)
970	{
971	int command = 0x97;
972	char data = 1;
973	i8042_command(param: &data, command: command | 1 << 12);
974	}
975
976	static void touchpad_led_off(void)
977	{
978	int command = 0x97;
979	char data = 2;
980	i8042_command(param: &data, command: command | 1 << 12);
981	}
982
983	static void touchpad_led_set(struct led_classdev *led_cdev,
984	enum led_brightness value)
985	{
986	if (value > 0)
987	touchpad_led_on();
988	else
989	touchpad_led_off();
990	}
991
992	static struct led_classdev touchpad_led = {
993	.name = "dell-laptop::touchpad",
994	.brightness_set = touchpad_led_set,
995	.flags = LED_CORE_SUSPENDRESUME,
996	};
997
998	static int __init touchpad_led_init(struct device *dev)
999	{
1000	return led_classdev_register(parent: dev, led_cdev: &touchpad_led);
1001	}
1002
1003	static void touchpad_led_exit(void)
1004	{
1005	led_classdev_unregister(led_cdev: &touchpad_led);
1006	}
1007
1008	/*
1009	* Derived from information in smbios-keyboard-ctl:
1010	*
1011	* cbClass 4
1012	* cbSelect 11
1013	* Keyboard illumination
1014	* cbArg1 determines the function to be performed
1015	*
1016	* cbArg1 0x0 = Get Feature Information
1017	* cbRES1 Standard return codes (0, -1, -2)
1018	* cbRES2, word0 Bitmap of user-selectable modes
1019	* bit 0 Always off (All systems)
1020	* bit 1 Always on (Travis ATG, Siberia)
1021	* bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1022	* bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1023	* bit 4 Auto: Input-activity-based On; input-activity based Off
1024	* bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1025	* bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1026	* bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1027	* bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1028	* bits 9-15 Reserved for future use
1029	* cbRES2, byte2 Reserved for future use
1030	* cbRES2, byte3 Keyboard illumination type
1031	* 0 Reserved
1032	* 1 Tasklight
1033	* 2 Backlight
1034	* 3-255 Reserved for future use
1035	* cbRES3, byte0 Supported auto keyboard illumination trigger bitmap.
1036	* bit 0 Any keystroke
1037	* bit 1 Touchpad activity
1038	* bit 2 Pointing stick
1039	* bit 3 Any mouse
1040	* bits 4-7 Reserved for future use
1041	* cbRES3, byte1 Supported timeout unit bitmap
1042	* bit 0 Seconds
1043	* bit 1 Minutes
1044	* bit 2 Hours
1045	* bit 3 Days
1046	* bits 4-7 Reserved for future use
1047	* cbRES3, byte2 Number of keyboard light brightness levels
1048	* cbRES4, byte0 Maximum acceptable seconds value (0 if seconds not supported).
1049	* cbRES4, byte1 Maximum acceptable minutes value (0 if minutes not supported).
1050	* cbRES4, byte2 Maximum acceptable hours value (0 if hours not supported).
1051	* cbRES4, byte3 Maximum acceptable days value (0 if days not supported)
1052	*
1053	* cbArg1 0x1 = Get Current State
1054	* cbRES1 Standard return codes (0, -1, -2)
1055	* cbRES2, word0 Bitmap of current mode state
1056	* bit 0 Always off (All systems)
1057	* bit 1 Always on (Travis ATG, Siberia)
1058	* bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1059	* bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1060	* bit 4 Auto: Input-activity-based On; input-activity based Off
1061	* bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1062	* bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1063	* bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1064	* bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1065	* bits 9-15 Reserved for future use
1066	* Note: Only One bit can be set
1067	* cbRES2, byte2 Currently active auto keyboard illumination triggers.
1068	* bit 0 Any keystroke
1069	* bit 1 Touchpad activity
1070	* bit 2 Pointing stick
1071	* bit 3 Any mouse
1072	* bits 4-7 Reserved for future use
1073	* cbRES2, byte3 Current Timeout on battery
1074	* bits 7:6 Timeout units indicator:
1075	* 00b Seconds
1076	* 01b Minutes
1077	* 10b Hours
1078	* 11b Days
1079	* bits 5:0 Timeout value (0-63) in sec/min/hr/day
1080	* NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte
1081	* are set upon return from the [Get feature information] call.
1082	* cbRES3, byte0 Current setting of ALS value that turns the light on or off.
1083	* cbRES3, byte1 Current ALS reading
1084	* cbRES3, byte2 Current keyboard light level.
1085	* cbRES3, byte3 Current timeout on AC Power
1086	* bits 7:6 Timeout units indicator:
1087	* 00b Seconds
1088	* 01b Minutes
1089	* 10b Hours
1090	* 11b Days
1091	* Bits 5:0 Timeout value (0-63) in sec/min/hr/day
1092	* NOTE: A value of 0 means always on (no timeout) if any bits of RES3 byte2
1093	* are set upon return from the upon return from the [Get Feature information] call.
1094	*
1095	* cbArg1 0x2 = Set New State
1096	* cbRES1 Standard return codes (0, -1, -2)
1097	* cbArg2, word0 Bitmap of current mode state
1098	* bit 0 Always off (All systems)
1099	* bit 1 Always on (Travis ATG, Siberia)
1100	* bit 2 Auto: ALS-based On; ALS-based Off (Travis ATG)
1101	* bit 3 Auto: ALS- and input-activity-based On; input-activity based Off
1102	* bit 4 Auto: Input-activity-based On; input-activity based Off
1103	* bit 5 Auto: Input-activity-based On (illumination level 25%); input-activity based Off
1104	* bit 6 Auto: Input-activity-based On (illumination level 50%); input-activity based Off
1105	* bit 7 Auto: Input-activity-based On (illumination level 75%); input-activity based Off
1106	* bit 8 Auto: Input-activity-based On (illumination level 100%); input-activity based Off
1107	* bits 9-15 Reserved for future use
1108	* Note: Only One bit can be set
1109	* cbArg2, byte2 Desired auto keyboard illumination triggers. Must remain inactive to allow
1110	* keyboard to turn off automatically.
1111	* bit 0 Any keystroke
1112	* bit 1 Touchpad activity
1113	* bit 2 Pointing stick
1114	* bit 3 Any mouse
1115	* bits 4-7 Reserved for future use
1116	* cbArg2, byte3 Desired Timeout on battery
1117	* bits 7:6 Timeout units indicator:
1118	* 00b Seconds
1119	* 01b Minutes
1120	* 10b Hours
1121	* 11b Days
1122	* bits 5:0 Timeout value (0-63) in sec/min/hr/day
1123	* cbArg3, byte0 Desired setting of ALS value that turns the light on or off.
1124	* cbArg3, byte2 Desired keyboard light level.
1125	* cbArg3, byte3 Desired Timeout on AC power
1126	* bits 7:6 Timeout units indicator:
1127	* 00b Seconds
1128	* 01b Minutes
1129	* 10b Hours
1130	* 11b Days
1131	* bits 5:0 Timeout value (0-63) in sec/min/hr/day
1132	*/
1133
1134
1135	enum kbd_timeout_unit {
1136	KBD_TIMEOUT_SECONDS = 0,
1137	KBD_TIMEOUT_MINUTES,
1138	KBD_TIMEOUT_HOURS,
1139	KBD_TIMEOUT_DAYS,
1140	};
1141
1142	enum kbd_mode_bit {
1143	KBD_MODE_BIT_OFF = 0,
1144	KBD_MODE_BIT_ON,
1145	KBD_MODE_BIT_ALS,
1146	KBD_MODE_BIT_TRIGGER_ALS,
1147	KBD_MODE_BIT_TRIGGER,
1148	KBD_MODE_BIT_TRIGGER_25,
1149	KBD_MODE_BIT_TRIGGER_50,
1150	KBD_MODE_BIT_TRIGGER_75,
1151	KBD_MODE_BIT_TRIGGER_100,
1152	};
1153
1154	#define kbd_is_als_mode_bit(bit) \
1155	((bit) == KBD_MODE_BIT_ALS || (bit) == KBD_MODE_BIT_TRIGGER_ALS)
1156	#define kbd_is_trigger_mode_bit(bit) \
1157	((bit) >= KBD_MODE_BIT_TRIGGER_ALS && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1158	#define kbd_is_level_mode_bit(bit) \
1159	((bit) >= KBD_MODE_BIT_TRIGGER_25 && (bit) <= KBD_MODE_BIT_TRIGGER_100)
1160
1161	struct kbd_info {
1162	u16 modes;
1163	u8 type;
1164	u8 triggers;
1165	u8 levels;
1166	u8 seconds;
1167	u8 minutes;
1168	u8 hours;
1169	u8 days;
1170	};
1171
1172	struct kbd_state {
1173	u8 mode_bit;
1174	u8 triggers;
1175	u8 timeout_value;
1176	u8 timeout_unit;
1177	u8 timeout_value_ac;
1178	u8 timeout_unit_ac;
1179	u8 als_setting;
1180	u8 als_value;
1181	u8 level;
1182	};
1183
1184	static const int kbd_tokens[] = {
1185	KBD_LED_OFF_TOKEN,
1186	KBD_LED_AUTO_25_TOKEN,
1187	KBD_LED_AUTO_50_TOKEN,
1188	KBD_LED_AUTO_75_TOKEN,
1189	KBD_LED_AUTO_100_TOKEN,
1190	KBD_LED_ON_TOKEN,
1191	};
1192
1193	static u16 kbd_token_bits;
1194
1195	static struct kbd_info kbd_info;
1196	static bool kbd_als_supported;
1197	static bool kbd_triggers_supported;
1198	static bool kbd_timeout_ac_supported;
1199
1200	static u8 kbd_mode_levels[16];
1201	static int kbd_mode_levels_count;
1202
1203	static u8 kbd_previous_level;
1204	static u8 kbd_previous_mode_bit;
1205
1206	static bool kbd_led_present;
1207	static DEFINE_MUTEX(kbd_led_mutex);
1208	static enum led_brightness kbd_led_level;
1209
1210	/*
1211	* NOTE: there are three ways to set the keyboard backlight level.
1212	* First, via kbd_state.mode_bit (assigning KBD_MODE_BIT_TRIGGER_* value).
1213	* Second, via kbd_state.level (assigning numerical value <= kbd_info.levels).
1214	* Third, via SMBIOS tokens (KBD_LED_* in kbd_tokens)
1215	*
1216	* There are laptops which support only one of these methods. If we want to
1217	* support as many machines as possible we need to implement all three methods.
1218	* The first two methods use the kbd_state structure. The third uses SMBIOS
1219	* tokens. If kbd_info.levels == 0, the machine does not support setting the
1220	* keyboard backlight level via kbd_state.level.
1221	*/
1222
1223	static int kbd_get_info(struct kbd_info *info)
1224	{
1225	struct calling_interface_buffer buffer;
1226	u8 units;
1227	int ret;
1228
1229	dell_fill_request(buffer: &buffer, arg0: 0, arg1: 0, arg2: 0, arg3: 0);
1230	ret = dell_send_request(buffer: &buffer,
1231	CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1232	if (ret)
1233	return ret;
1234
1235	info->modes = buffer.output[1] & 0xFFFF;
1236	info->type = (buffer.output[1] >> 24) & 0xFF;
1237	info->triggers = buffer.output[2] & 0xFF;
1238	units = (buffer.output[2] >> 8) & 0xFF;
1239	info->levels = (buffer.output[2] >> 16) & 0xFF;
1240
1241	if (quirks && quirks->kbd_led_levels_off_1 && info->levels)
1242	info->levels--;
1243
1244	if (units & BIT(0))
1245	info->seconds = (buffer.output[3] >> 0) & 0xFF;
1246	if (units & BIT(1))
1247	info->minutes = (buffer.output[3] >> 8) & 0xFF;
1248	if (units & BIT(2))
1249	info->hours = (buffer.output[3] >> 16) & 0xFF;
1250	if (units & BIT(3))
1251	info->days = (buffer.output[3] >> 24) & 0xFF;
1252
1253	return ret;
1254	}
1255
1256	static unsigned int kbd_get_max_level(void)
1257	{
1258	if (kbd_info.levels != 0)
1259	return kbd_info.levels;
1260	if (kbd_mode_levels_count > 0)
1261	return kbd_mode_levels_count - 1;
1262	return 0;
1263	}
1264
1265	static int kbd_get_level(struct kbd_state *state)
1266	{
1267	int i;
1268
1269	if (kbd_info.levels != 0)
1270	return state->level;
1271
1272	if (kbd_mode_levels_count > 0) {
1273	for (i = 0; i < kbd_mode_levels_count; ++i)
1274	if (kbd_mode_levels[i] == state->mode_bit)
1275	return i;
1276	return 0;
1277	}
1278
1279	return -EINVAL;
1280	}
1281
1282	static int kbd_set_level(struct kbd_state *state, u8 level)
1283	{
1284	if (kbd_info.levels != 0) {
1285	if (level != 0)
1286	kbd_previous_level = level;
1287	if (state->level == level)
1288	return 0;
1289	state->level = level;
1290	if (level != 0 && state->mode_bit == KBD_MODE_BIT_OFF)
1291	state->mode_bit = kbd_previous_mode_bit;
1292	else if (level == 0 && state->mode_bit != KBD_MODE_BIT_OFF) {
1293	kbd_previous_mode_bit = state->mode_bit;
1294	state->mode_bit = KBD_MODE_BIT_OFF;
1295	}
1296	return 0;
1297	}
1298
1299	if (kbd_mode_levels_count > 0 && level < kbd_mode_levels_count) {
1300	if (level != 0)
1301	kbd_previous_level = level;
1302	state->mode_bit = kbd_mode_levels[level];
1303	return 0;
1304	}
1305
1306	return -EINVAL;
1307	}
1308
1309	static int kbd_get_state(struct kbd_state *state)
1310	{
1311	struct calling_interface_buffer buffer;
1312	int ret;
1313
1314	dell_fill_request(buffer: &buffer, arg0: 0x1, arg1: 0, arg2: 0, arg3: 0);
1315	ret = dell_send_request(buffer: &buffer,
1316	CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1317	if (ret)
1318	return ret;
1319
1320	state->mode_bit = ffs(buffer.output[1] & 0xFFFF);
1321	if (state->mode_bit != 0)
1322	state->mode_bit--;
1323
1324	state->triggers = (buffer.output[1] >> 16) & 0xFF;
1325	state->timeout_value = (buffer.output[1] >> 24) & 0x3F;
1326	state->timeout_unit = (buffer.output[1] >> 30) & 0x3;
1327	state->als_setting = buffer.output[2] & 0xFF;
1328	state->als_value = (buffer.output[2] >> 8) & 0xFF;
1329	state->level = (buffer.output[2] >> 16) & 0xFF;
1330	state->timeout_value_ac = (buffer.output[2] >> 24) & 0x3F;
1331	state->timeout_unit_ac = (buffer.output[2] >> 30) & 0x3;
1332
1333	return ret;
1334	}
1335
1336	static int kbd_set_state(struct kbd_state *state)
1337	{
1338	struct calling_interface_buffer buffer;
1339	int ret;
1340	u32 input1;
1341	u32 input2;
1342
1343	input1 = BIT(state->mode_bit) & 0xFFFF;
1344	input1 |= (state->triggers & 0xFF) << 16;
1345	input1 |= (state->timeout_value & 0x3F) << 24;
1346	input1 |= (state->timeout_unit & 0x3) << 30;
1347	input2 = state->als_setting & 0xFF;
1348	input2 |= (state->level & 0xFF) << 16;
1349	input2 |= (state->timeout_value_ac & 0x3F) << 24;
1350	input2 |= (state->timeout_unit_ac & 0x3) << 30;
1351	dell_fill_request(buffer: &buffer, arg0: 0x2, arg1: input1, arg2: input2, arg3: 0);
1352	ret = dell_send_request(buffer: &buffer,
1353	CLASS_KBD_BACKLIGHT, SELECT_KBD_BACKLIGHT);
1354
1355	return ret;
1356	}
1357
1358	static int kbd_set_state_safe(struct kbd_state *state, struct kbd_state *old)
1359	{
1360	int ret;
1361
1362	ret = kbd_set_state(state);
1363	if (ret == 0)
1364	return 0;
1365
1366	/*
1367	* When setting the new state fails,try to restore the previous one.
1368	* This is needed on some machines where BIOS sets a default state when
1369	* setting a new state fails. This default state could be all off.
1370	*/
1371
1372	if (kbd_set_state(state: old))
1373	pr_err("Setting old previous keyboard state failed\n");
1374
1375	return ret;
1376	}
1377
1378	static int kbd_set_token_bit(u8 bit)
1379	{
1380	struct calling_interface_buffer buffer;
1381	struct calling_interface_token *token;
1382	int ret;
1383
1384	if (bit >= ARRAY_SIZE(kbd_tokens))
1385	return -EINVAL;
1386
1387	token = dell_smbios_find_token(tokenid: kbd_tokens[bit]);
1388	if (!token)
1389	return -EINVAL;
1390
1391	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: token->value, arg2: 0, arg3: 0);
1392	ret = dell_send_request(buffer: &buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
1393
1394	return ret;
1395	}
1396
1397	static int kbd_get_token_bit(u8 bit)
1398	{
1399	struct calling_interface_buffer buffer;
1400	struct calling_interface_token *token;
1401	int ret;
1402	int val;
1403
1404	if (bit >= ARRAY_SIZE(kbd_tokens))
1405	return -EINVAL;
1406
1407	token = dell_smbios_find_token(tokenid: kbd_tokens[bit]);
1408	if (!token)
1409	return -EINVAL;
1410
1411	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: 0, arg2: 0, arg3: 0);
1412	ret = dell_send_request(buffer: &buffer, CLASS_TOKEN_READ, SELECT_TOKEN_STD);
1413	val = buffer.output[1];
1414
1415	if (ret)
1416	return ret;
1417
1418	return (val == token->value);
1419	}
1420
1421	static int kbd_get_first_active_token_bit(void)
1422	{
1423	int i;
1424	int ret;
1425
1426	for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i) {
1427	ret = kbd_get_token_bit(bit: i);
1428	if (ret == 1)
1429	return i;
1430	}
1431
1432	return ret;
1433	}
1434
1435	static int kbd_get_valid_token_counts(void)
1436	{
1437	return hweight16(kbd_token_bits);
1438	}
1439
1440	static inline int kbd_init_info(void)
1441	{
1442	struct kbd_state state;
1443	int ret;
1444	int i;
1445
1446	ret = kbd_get_info(info: &kbd_info);
1447	if (ret)
1448	return ret;
1449
1450	/* NOTE: Old models without KBD_LED_AC_TOKEN token supports only one
1451	* timeout value which is shared for both battery and AC power
1452	* settings. So do not try to set AC values on old models.
1453	*/
1454	if ((quirks && quirks->kbd_missing_ac_tag) ||
1455	dell_smbios_find_token(KBD_LED_AC_TOKEN))
1456	kbd_timeout_ac_supported = true;
1457
1458	kbd_get_state(state: &state);
1459
1460	/* NOTE: timeout value is stored in 6 bits so max value is 63 */
1461	if (kbd_info.seconds > 63)
1462	kbd_info.seconds = 63;
1463	if (kbd_info.minutes > 63)
1464	kbd_info.minutes = 63;
1465	if (kbd_info.hours > 63)
1466	kbd_info.hours = 63;
1467	if (kbd_info.days > 63)
1468	kbd_info.days = 63;
1469
1470	/* NOTE: On tested machines ON mode did not work and caused
1471	* problems (turned backlight off) so do not use it
1472	*/
1473	kbd_info.modes &= ~BIT(KBD_MODE_BIT_ON);
1474
1475	kbd_previous_level = kbd_get_level(state: &state);
1476	kbd_previous_mode_bit = state.mode_bit;
1477
1478	if (kbd_previous_level == 0 && kbd_get_max_level() != 0)
1479	kbd_previous_level = 1;
1480
1481	if (kbd_previous_mode_bit == KBD_MODE_BIT_OFF) {
1482	kbd_previous_mode_bit =
1483	ffs(kbd_info.modes & ~BIT(KBD_MODE_BIT_OFF));
1484	if (kbd_previous_mode_bit != 0)
1485	kbd_previous_mode_bit--;
1486	}
1487
1488	if (kbd_info.modes & (BIT(KBD_MODE_BIT_ALS) |
1489	BIT(KBD_MODE_BIT_TRIGGER_ALS)))
1490	kbd_als_supported = true;
1491
1492	if (kbd_info.modes & (
1493	BIT(KBD_MODE_BIT_TRIGGER_ALS) | BIT(KBD_MODE_BIT_TRIGGER) |
1494	BIT(KBD_MODE_BIT_TRIGGER_25) | BIT(KBD_MODE_BIT_TRIGGER_50) |
1495	BIT(KBD_MODE_BIT_TRIGGER_75) | BIT(KBD_MODE_BIT_TRIGGER_100)
1496	))
1497	kbd_triggers_supported = true;
1498
1499	/* kbd_mode_levels[0] is reserved, see below */
1500	for (i = 0; i < 16; ++i)
1501	if (kbd_is_level_mode_bit(i) && (BIT(i) & kbd_info.modes))
1502	kbd_mode_levels[1 + kbd_mode_levels_count++] = i;
1503
1504	/*
1505	* Find the first supported mode and assign to kbd_mode_levels[0].
1506	* This should be 0 (off), but we cannot depend on the BIOS to
1507	* support 0.
1508	*/
1509	if (kbd_mode_levels_count > 0) {
1510	for (i = 0; i < 16; ++i) {
1511	if (BIT(i) & kbd_info.modes) {
1512	kbd_mode_levels[0] = i;
1513	break;
1514	}
1515	}
1516	kbd_mode_levels_count++;
1517	}
1518
1519	return 0;
1520
1521	}
1522
1523	static inline void kbd_init_tokens(void)
1524	{
1525	int i;
1526
1527	for (i = 0; i < ARRAY_SIZE(kbd_tokens); ++i)
1528	if (dell_smbios_find_token(tokenid: kbd_tokens[i]))
1529	kbd_token_bits |= BIT(i);
1530	}
1531
1532	static void kbd_init(void)
1533	{
1534	int ret;
1535
1536	if (quirks && quirks->kbd_led_not_present)
1537	return;
1538
1539	ret = kbd_init_info();
1540	kbd_init_tokens();
1541
1542	/*
1543	* Only supports keyboard backlight when it has at least two modes.
1544	*/
1545	if ((ret == 0 && (kbd_info.levels != 0 || kbd_mode_levels_count >= 2))
1546	|| kbd_get_valid_token_counts() >= 2)
1547	kbd_led_present = true;
1548	}
1549
1550	static ssize_t kbd_led_timeout_store(struct device *dev,
1551	struct device_attribute *attr,
1552	const char *buf, size_t count)
1553	{
1554	struct kbd_state new_state;
1555	struct kbd_state state;
1556	bool convert;
1557	int value;
1558	int ret;
1559	char ch;
1560	u8 unit;
1561	int i;
1562
1563	ret = sscanf(buf, "%d %c", &value, &ch);
1564	if (ret < 1)
1565	return -EINVAL;
1566	else if (ret == 1)
1567	ch = 's';
1568
1569	if (value < 0)
1570	return -EINVAL;
1571
1572	convert = false;
1573
1574	switch (ch) {
1575	case 's':
1576	if (value > kbd_info.seconds)
1577	convert = true;
1578	unit = KBD_TIMEOUT_SECONDS;
1579	break;
1580	case 'm':
1581	if (value > kbd_info.minutes)
1582	convert = true;
1583	unit = KBD_TIMEOUT_MINUTES;
1584	break;
1585	case 'h':
1586	if (value > kbd_info.hours)
1587	convert = true;
1588	unit = KBD_TIMEOUT_HOURS;
1589	break;
1590	case 'd':
1591	if (value > kbd_info.days)
1592	convert = true;
1593	unit = KBD_TIMEOUT_DAYS;
1594	break;
1595	default:
1596	return -EINVAL;
1597	}
1598
1599	if (quirks && quirks->needs_kbd_timeouts)
1600	convert = true;
1601
1602	if (convert) {
1603	/* Convert value from current units to seconds */
1604	switch (unit) {
1605	case KBD_TIMEOUT_DAYS:
1606	value *= 24;
1607	fallthrough;
1608	case KBD_TIMEOUT_HOURS:
1609	value *= 60;
1610	fallthrough;
1611	case KBD_TIMEOUT_MINUTES:
1612	value *= 60;
1613	unit = KBD_TIMEOUT_SECONDS;
1614	}
1615
1616	if (quirks && quirks->needs_kbd_timeouts) {
1617	for (i = 0; quirks->kbd_timeouts[i] != -1; i++) {
1618	if (value <= quirks->kbd_timeouts[i]) {
1619	value = quirks->kbd_timeouts[i];
1620	break;
1621	}
1622	}
1623	}
1624
1625	if (value <= kbd_info.seconds && kbd_info.seconds) {
1626	unit = KBD_TIMEOUT_SECONDS;
1627	} else if (value / 60 <= kbd_info.minutes && kbd_info.minutes) {
1628	value /= 60;
1629	unit = KBD_TIMEOUT_MINUTES;
1630	} else if (value / (60 * 60) <= kbd_info.hours && kbd_info.hours) {
1631	value /= (60 * 60);
1632	unit = KBD_TIMEOUT_HOURS;
1633	} else if (value / (60 * 60 * 24) <= kbd_info.days && kbd_info.days) {
1634	value /= (60 * 60 * 24);
1635	unit = KBD_TIMEOUT_DAYS;
1636	} else {
1637	return -EINVAL;
1638	}
1639	}
1640
1641	mutex_lock(&kbd_led_mutex);
1642
1643	ret = kbd_get_state(state: &state);
1644	if (ret)
1645	goto out;
1646
1647	new_state = state;
1648
1649	if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1650	new_state.timeout_value_ac = value;
1651	new_state.timeout_unit_ac = unit;
1652	} else {
1653	new_state.timeout_value = value;
1654	new_state.timeout_unit = unit;
1655	}
1656
1657	ret = kbd_set_state_safe(state: &new_state, old: &state);
1658	if (ret)
1659	goto out;
1660
1661	ret = count;
1662	out:
1663	mutex_unlock(lock: &kbd_led_mutex);
1664	return ret;
1665	}
1666
1667	static ssize_t kbd_led_timeout_show(struct device *dev,
1668	struct device_attribute *attr, char *buf)
1669	{
1670	struct kbd_state state;
1671	int value;
1672	int ret;
1673	int len;
1674	u8 unit;
1675
1676	ret = kbd_get_state(state: &state);
1677	if (ret)
1678	return ret;
1679
1680	if (kbd_timeout_ac_supported && power_supply_is_system_supplied() > 0) {
1681	value = state.timeout_value_ac;
1682	unit = state.timeout_unit_ac;
1683	} else {
1684	value = state.timeout_value;
1685	unit = state.timeout_unit;
1686	}
1687
1688	len = sprintf(buf, fmt: "%d", value);
1689
1690	switch (unit) {
1691	case KBD_TIMEOUT_SECONDS:
1692	return len + sprintf(buf: buf+len, fmt: "s\n");
1693	case KBD_TIMEOUT_MINUTES:
1694	return len + sprintf(buf: buf+len, fmt: "m\n");
1695	case KBD_TIMEOUT_HOURS:
1696	return len + sprintf(buf: buf+len, fmt: "h\n");
1697	case KBD_TIMEOUT_DAYS:
1698	return len + sprintf(buf: buf+len, fmt: "d\n");
1699	default:
1700	return -EINVAL;
1701	}
1702
1703	return len;
1704	}
1705
1706	static DEVICE_ATTR(stop_timeout, S_IRUGO | S_IWUSR,
1707	kbd_led_timeout_show, kbd_led_timeout_store);
1708
1709	static const char * const kbd_led_triggers[] = {
1710	"keyboard",
1711	"touchpad",
1712	/*"trackstick"*/ NULL, /* NOTE: trackstick is just alias for touchpad */
1713	"mouse",
1714	};
1715
1716	static ssize_t kbd_led_triggers_store(struct device *dev,
1717	struct device_attribute *attr,
1718	const char *buf, size_t count)
1719	{
1720	struct kbd_state new_state;
1721	struct kbd_state state;
1722	bool triggers_enabled = false;
1723	int trigger_bit = -1;
1724	char trigger[21];
1725	int i, ret;
1726
1727	ret = sscanf(buf, "%20s", trigger);
1728	if (ret != 1)
1729	return -EINVAL;
1730
1731	if (trigger[0] != '+' && trigger[0] != '-')
1732	return -EINVAL;
1733
1734	mutex_lock(&kbd_led_mutex);
1735
1736	ret = kbd_get_state(state: &state);
1737	if (ret)
1738	goto out;
1739
1740	if (kbd_triggers_supported)
1741	triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1742
1743	if (kbd_triggers_supported) {
1744	for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1745	if (!(kbd_info.triggers & BIT(i)))
1746	continue;
1747	if (!kbd_led_triggers[i])
1748	continue;
1749	if (strcmp(trigger+1, kbd_led_triggers[i]) != 0)
1750	continue;
1751	if (trigger[0] == '+' &&
1752	triggers_enabled && (state.triggers & BIT(i))) {
1753	ret = count;
1754	goto out;
1755	}
1756	if (trigger[0] == '-' &&
1757	(!triggers_enabled || !(state.triggers & BIT(i)))) {
1758	ret = count;
1759	goto out;
1760	}
1761	trigger_bit = i;
1762	break;
1763	}
1764	}
1765
1766	if (trigger_bit == -1) {
1767	ret = -EINVAL;
1768	goto out;
1769	}
1770
1771	new_state = state;
1772	if (trigger[0] == '+')
1773	new_state.triggers |= BIT(trigger_bit);
1774	else {
1775	new_state.triggers &= ~BIT(trigger_bit);
1776	/*
1777	* NOTE: trackstick bit (2) must be disabled when
1778	* disabling touchpad bit (1), otherwise touchpad
1779	* bit (1) will not be disabled
1780	*/
1781	if (trigger_bit == 1)
1782	new_state.triggers &= ~BIT(2);
1783	}
1784	if ((kbd_info.triggers & new_state.triggers) !=
1785	new_state.triggers) {
1786	ret = -EINVAL;
1787	goto out;
1788	}
1789	if (new_state.triggers && !triggers_enabled) {
1790	new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1791	kbd_set_level(state: &new_state, level: kbd_previous_level);
1792	} else if (new_state.triggers == 0) {
1793	kbd_set_level(state: &new_state, level: 0);
1794	}
1795	if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1796	ret = -EINVAL;
1797	goto out;
1798	}
1799	ret = kbd_set_state_safe(state: &new_state, old: &state);
1800	if (ret)
1801	goto out;
1802	if (new_state.mode_bit != KBD_MODE_BIT_OFF)
1803	kbd_previous_mode_bit = new_state.mode_bit;
1804	ret = count;
1805	out:
1806	mutex_unlock(lock: &kbd_led_mutex);
1807	return ret;
1808	}
1809
1810	static ssize_t kbd_led_triggers_show(struct device *dev,
1811	struct device_attribute *attr, char *buf)
1812	{
1813	struct kbd_state state;
1814	bool triggers_enabled;
1815	int level, i, ret;
1816	int len = 0;
1817
1818	ret = kbd_get_state(state: &state);
1819	if (ret)
1820	return ret;
1821
1822	len = 0;
1823
1824	if (kbd_triggers_supported) {
1825	triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1826	level = kbd_get_level(state: &state);
1827	for (i = 0; i < ARRAY_SIZE(kbd_led_triggers); ++i) {
1828	if (!(kbd_info.triggers & BIT(i)))
1829	continue;
1830	if (!kbd_led_triggers[i])
1831	continue;
1832	if ((triggers_enabled || level <= 0) &&
1833	(state.triggers & BIT(i)))
1834	buf[len++] = '+';
1835	else
1836	buf[len++] = '-';
1837	len += sprintf(buf: buf+len, fmt: "%s ", kbd_led_triggers[i]);
1838	}
1839	}
1840
1841	if (len)
1842	buf[len - 1] = '\n';
1843
1844	return len;
1845	}
1846
1847	static DEVICE_ATTR(start_triggers, S_IRUGO | S_IWUSR,
1848	kbd_led_triggers_show, kbd_led_triggers_store);
1849
1850	static ssize_t kbd_led_als_enabled_store(struct device *dev,
1851	struct device_attribute *attr,
1852	const char *buf, size_t count)
1853	{
1854	struct kbd_state new_state;
1855	struct kbd_state state;
1856	bool triggers_enabled = false;
1857	int enable;
1858	int ret;
1859
1860	ret = kstrtoint(s: buf, base: 0, res: &enable);
1861	if (ret)
1862	return ret;
1863
1864	mutex_lock(&kbd_led_mutex);
1865
1866	ret = kbd_get_state(state: &state);
1867	if (ret)
1868	goto out;
1869
1870	if (enable == kbd_is_als_mode_bit(state.mode_bit)) {
1871	ret = count;
1872	goto out;
1873	}
1874
1875	new_state = state;
1876
1877	if (kbd_triggers_supported)
1878	triggers_enabled = kbd_is_trigger_mode_bit(state.mode_bit);
1879
1880	if (enable) {
1881	if (triggers_enabled)
1882	new_state.mode_bit = KBD_MODE_BIT_TRIGGER_ALS;
1883	else
1884	new_state.mode_bit = KBD_MODE_BIT_ALS;
1885	} else {
1886	if (triggers_enabled) {
1887	new_state.mode_bit = KBD_MODE_BIT_TRIGGER;
1888	kbd_set_level(state: &new_state, level: kbd_previous_level);
1889	} else {
1890	new_state.mode_bit = KBD_MODE_BIT_ON;
1891	}
1892	}
1893	if (!(kbd_info.modes & BIT(new_state.mode_bit))) {
1894	ret = -EINVAL;
1895	goto out;
1896	}
1897
1898	ret = kbd_set_state_safe(state: &new_state, old: &state);
1899	if (ret)
1900	goto out;
1901	kbd_previous_mode_bit = new_state.mode_bit;
1902
1903	ret = count;
1904	out:
1905	mutex_unlock(lock: &kbd_led_mutex);
1906	return ret;
1907	}
1908
1909	static ssize_t kbd_led_als_enabled_show(struct device *dev,
1910	struct device_attribute *attr,
1911	char *buf)
1912	{
1913	struct kbd_state state;
1914	bool enabled = false;
1915	int ret;
1916
1917	ret = kbd_get_state(state: &state);
1918	if (ret)
1919	return ret;
1920	enabled = kbd_is_als_mode_bit(state.mode_bit);
1921
1922	return sprintf(buf, fmt: "%d\n", enabled ? 1 : 0);
1923	}
1924
1925	static DEVICE_ATTR(als_enabled, S_IRUGO | S_IWUSR,
1926	kbd_led_als_enabled_show, kbd_led_als_enabled_store);
1927
1928	static ssize_t kbd_led_als_setting_store(struct device *dev,
1929	struct device_attribute *attr,
1930	const char *buf, size_t count)
1931	{
1932	struct kbd_state state;
1933	struct kbd_state new_state;
1934	u8 setting;
1935	int ret;
1936
1937	ret = kstrtou8(s: buf, base: 10, res: &setting);
1938	if (ret)
1939	return ret;
1940
1941	mutex_lock(&kbd_led_mutex);
1942
1943	ret = kbd_get_state(state: &state);
1944	if (ret)
1945	goto out;
1946
1947	new_state = state;
1948	new_state.als_setting = setting;
1949
1950	ret = kbd_set_state_safe(state: &new_state, old: &state);
1951	if (ret)
1952	goto out;
1953
1954	ret = count;
1955	out:
1956	mutex_unlock(lock: &kbd_led_mutex);
1957	return ret;
1958	}
1959
1960	static ssize_t kbd_led_als_setting_show(struct device *dev,
1961	struct device_attribute *attr,
1962	char *buf)
1963	{
1964	struct kbd_state state;
1965	int ret;
1966
1967	ret = kbd_get_state(state: &state);
1968	if (ret)
1969	return ret;
1970
1971	return sprintf(buf, fmt: "%d\n", state.als_setting);
1972	}
1973
1974	static DEVICE_ATTR(als_setting, S_IRUGO | S_IWUSR,
1975	kbd_led_als_setting_show, kbd_led_als_setting_store);
1976
1977	static struct attribute *kbd_led_attrs[] = {
1978	&dev_attr_stop_timeout.attr,
1979	&dev_attr_start_triggers.attr,
1980	NULL,
1981	};
1982
1983	static const struct attribute_group kbd_led_group = {
1984	.attrs = kbd_led_attrs,
1985	};
1986
1987	static struct attribute *kbd_led_als_attrs[] = {
1988	&dev_attr_als_enabled.attr,
1989	&dev_attr_als_setting.attr,
1990	NULL,
1991	};
1992
1993	static const struct attribute_group kbd_led_als_group = {
1994	.attrs = kbd_led_als_attrs,
1995	};
1996
1997	static const struct attribute_group *kbd_led_groups[] = {
1998	&kbd_led_group,
1999	&kbd_led_als_group,
2000	NULL,
2001	};
2002
2003	static enum led_brightness kbd_led_level_get(struct led_classdev *led_cdev)
2004	{
2005	int ret;
2006	u16 num;
2007	struct kbd_state state;
2008
2009	if (kbd_get_max_level()) {
2010	ret = kbd_get_state(state: &state);
2011	if (ret)
2012	return 0;
2013	ret = kbd_get_level(state: &state);
2014	if (ret < 0)
2015	return 0;
2016	return ret;
2017	}
2018
2019	if (kbd_get_valid_token_counts()) {
2020	ret = kbd_get_first_active_token_bit();
2021	if (ret < 0)
2022	return 0;
2023	for (num = kbd_token_bits; num != 0 && ret > 0; --ret)
2024	num &= num - 1; /* clear the first bit set */
2025	if (num == 0)
2026	return 0;
2027	return ffs(num) - 1;
2028	}
2029
2030	pr_warn("Keyboard brightness level control not supported\n");
2031	return 0;
2032	}
2033
2034	static int kbd_led_level_set(struct led_classdev *led_cdev,
2035	enum led_brightness value)
2036	{
2037	enum led_brightness new_value = value;
2038	struct kbd_state state;
2039	struct kbd_state new_state;
2040	u16 num;
2041	int ret;
2042
2043	mutex_lock(&kbd_led_mutex);
2044
2045	if (kbd_get_max_level()) {
2046	ret = kbd_get_state(state: &state);
2047	if (ret)
2048	goto out;
2049	new_state = state;
2050	ret = kbd_set_level(state: &new_state, level: value);
2051	if (ret)
2052	goto out;
2053	ret = kbd_set_state_safe(state: &new_state, old: &state);
2054	} else if (kbd_get_valid_token_counts()) {
2055	for (num = kbd_token_bits; num != 0 && value > 0; --value)
2056	num &= num - 1; /* clear the first bit set */
2057	if (num == 0)
2058	ret = 0;
2059	else
2060	ret = kbd_set_token_bit(ffs(num) - 1);
2061	} else {
2062	pr_warn("Keyboard brightness level control not supported\n");
2063	ret = -ENXIO;
2064	}
2065
2066	out:
2067	if (ret == 0)
2068	kbd_led_level = new_value;
2069
2070	mutex_unlock(lock: &kbd_led_mutex);
2071	return ret;
2072	}
2073
2074	static struct led_classdev kbd_led = {
2075	.name = "dell::kbd_backlight",
2076	.flags = LED_BRIGHT_HW_CHANGED,
2077	.brightness_set_blocking = kbd_led_level_set,
2078	.brightness_get = kbd_led_level_get,
2079	.groups = kbd_led_groups,
2080	};
2081
2082	static int __init kbd_led_init(struct device *dev)
2083	{
2084	int ret;
2085
2086	kbd_init();
2087	if (!kbd_led_present)
2088	return -ENODEV;
2089	if (!kbd_als_supported)
2090	kbd_led_groups[1] = NULL;
2091	kbd_led.max_brightness = kbd_get_max_level();
2092	if (!kbd_led.max_brightness) {
2093	kbd_led.max_brightness = kbd_get_valid_token_counts();
2094	if (kbd_led.max_brightness)
2095	kbd_led.max_brightness--;
2096	}
2097
2098	kbd_led_level = kbd_led_level_get(NULL);
2099
2100	ret = led_classdev_register(parent: dev, led_cdev: &kbd_led);
2101	if (ret)
2102	kbd_led_present = false;
2103
2104	return ret;
2105	}
2106
2107	static void brightness_set_exit(struct led_classdev *led_cdev,
2108	enum led_brightness value)
2109	{
2110	/* Don't change backlight level on exit */
2111	};
2112
2113	static void kbd_led_exit(void)
2114	{
2115	if (!kbd_led_present)
2116	return;
2117	kbd_led.brightness_set = brightness_set_exit;
2118	led_classdev_unregister(led_cdev: &kbd_led);
2119	}
2120
2121	static int dell_laptop_notifier_call(struct notifier_block *nb,
2122	unsigned long action, void *data)
2123	{
2124	bool changed = false;
2125	enum led_brightness new_kbd_led_level;
2126
2127	switch (action) {
2128	case DELL_LAPTOP_KBD_BACKLIGHT_BRIGHTNESS_CHANGED:
2129	if (!kbd_led_present)
2130	break;
2131
2132	mutex_lock(&kbd_led_mutex);
2133	new_kbd_led_level = kbd_led_level_get(led_cdev: &kbd_led);
2134	if (kbd_led_level != new_kbd_led_level) {
2135	kbd_led_level = new_kbd_led_level;
2136	changed = true;
2137	}
2138	mutex_unlock(lock: &kbd_led_mutex);
2139
2140	if (changed)
2141	led_classdev_notify_brightness_hw_changed(led_cdev: &kbd_led,
2142	brightness: kbd_led_level);
2143	break;
2144	}
2145
2146	return NOTIFY_OK;
2147	}
2148
2149	static struct notifier_block dell_laptop_notifier = {
2150	.notifier_call = dell_laptop_notifier_call,
2151	};
2152
2153	static int micmute_led_set(struct led_classdev *led_cdev,
2154	enum led_brightness brightness)
2155	{
2156	struct calling_interface_buffer buffer;
2157	struct calling_interface_token *token;
2158	int state = brightness != LED_OFF;
2159
2160	if (state == 0)
2161	token = dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE);
2162	else
2163	token = dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE);
2164
2165	if (!token)
2166	return -ENODEV;
2167
2168	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: token->value, arg2: 0, arg3: 0);
2169	dell_send_request(buffer: &buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
2170
2171	return 0;
2172	}
2173
2174	static struct led_classdev micmute_led_cdev = {
2175	.name = "platform::micmute",
2176	.max_brightness = 1,
2177	.brightness_set_blocking = micmute_led_set,
2178	.default_trigger = "audio-micmute",
2179	};
2180
2181	static int mute_led_set(struct led_classdev *led_cdev,
2182	enum led_brightness brightness)
2183	{
2184	struct calling_interface_buffer buffer;
2185	struct calling_interface_token *token;
2186	int state = brightness != LED_OFF;
2187
2188	if (state == 0)
2189	token = dell_smbios_find_token(GLOBAL_MUTE_DISABLE);
2190	else
2191	token = dell_smbios_find_token(GLOBAL_MUTE_ENABLE);
2192
2193	if (!token)
2194	return -ENODEV;
2195
2196	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: token->value, arg2: 0, arg3: 0);
2197	dell_send_request(buffer: &buffer, CLASS_TOKEN_WRITE, SELECT_TOKEN_STD);
2198
2199	return 0;
2200	}
2201
2202	static struct led_classdev mute_led_cdev = {
2203	.name = "platform::mute",
2204	.max_brightness = 1,
2205	.brightness_set_blocking = mute_led_set,
2206	.default_trigger = "audio-mute",
2207	};
2208
2209	static int __init dell_init(void)
2210	{
2211	struct calling_interface_token *token;
2212	int max_intensity = 0;
2213	int ret;
2214
2215	if (!dmi_check_system(list: dell_device_table))
2216	return -ENODEV;
2217
2218	quirks = NULL;
2219	/* find if this machine support other functions */
2220	dmi_check_system(list: dell_quirks);
2221
2222	ret = platform_driver_register(&platform_driver);
2223	if (ret)
2224	goto fail_platform_driver;
2225	platform_device = platform_device_alloc(name: "dell-laptop", PLATFORM_DEVID_NONE);
2226	if (!platform_device) {
2227	ret = -ENOMEM;
2228	goto fail_platform_device1;
2229	}
2230	ret = platform_device_add(pdev: platform_device);
2231	if (ret)
2232	goto fail_platform_device2;
2233
2234	ret = dell_setup_rfkill();
2235
2236	if (ret) {
2237	pr_warn("Unable to setup rfkill\n");
2238	goto fail_rfkill;
2239	}
2240
2241	if (quirks && quirks->touchpad_led)
2242	touchpad_led_init(dev: &platform_device->dev);
2243
2244	kbd_led_init(dev: &platform_device->dev);
2245
2246	dell_laptop_dir = debugfs_create_dir(name: "dell_laptop", NULL);
2247	debugfs_create_file(name: "rfkill", mode: 0444, parent: dell_laptop_dir, NULL,
2248	fops: &dell_debugfs_fops);
2249
2250	dell_laptop_register_notifier(nb: &dell_laptop_notifier);
2251
2252	if (dell_smbios_find_token(GLOBAL_MIC_MUTE_DISABLE) &&
2253	dell_smbios_find_token(GLOBAL_MIC_MUTE_ENABLE) &&
2254	!dell_privacy_has_mic_mute()) {
2255	ret = led_classdev_register(parent: &platform_device->dev, led_cdev: &micmute_led_cdev);
2256	if (ret < 0)
2257	goto fail_led;
2258	micmute_led_registered = true;
2259	}
2260
2261	if (dell_smbios_find_token(GLOBAL_MUTE_DISABLE) &&
2262	dell_smbios_find_token(GLOBAL_MUTE_ENABLE)) {
2263	ret = led_classdev_register(parent: &platform_device->dev, led_cdev: &mute_led_cdev);
2264	if (ret < 0)
2265	goto fail_backlight;
2266	mute_led_registered = true;
2267	}
2268
2269	if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
2270	return 0;
2271
2272	token = dell_smbios_find_token(BRIGHTNESS_TOKEN);
2273	if (token) {
2274	struct calling_interface_buffer buffer;
2275
2276	dell_fill_request(buffer: &buffer, arg0: token->location, arg1: 0, arg2: 0, arg3: 0);
2277	ret = dell_send_request(buffer: &buffer,
2278	CLASS_TOKEN_READ, SELECT_TOKEN_AC);
2279	if (ret == 0)
2280	max_intensity = buffer.output[3];
2281	}
2282
2283	if (max_intensity) {
2284	struct backlight_properties props;
2285	memset(&props, 0, sizeof(struct backlight_properties));
2286	props.type = BACKLIGHT_PLATFORM;
2287	props.max_brightness = max_intensity;
2288	dell_backlight_device = backlight_device_register(name: "dell_backlight",
2289	dev: &platform_device->dev,
2290	NULL,
2291	ops: &dell_ops,
2292	props: &props);
2293
2294	if (IS_ERR(ptr: dell_backlight_device)) {
2295	ret = PTR_ERR(ptr: dell_backlight_device);
2296	dell_backlight_device = NULL;
2297	goto fail_backlight;
2298	}
2299
2300	dell_backlight_device->props.brightness =
2301	dell_get_intensity(bd: dell_backlight_device);
2302	if (dell_backlight_device->props.brightness < 0) {
2303	ret = dell_backlight_device->props.brightness;
2304	goto fail_get_brightness;
2305	}
2306	backlight_update_status(bd: dell_backlight_device);
2307	}
2308
2309	return 0;
2310
2311	fail_get_brightness:
2312	backlight_device_unregister(bd: dell_backlight_device);
2313	fail_backlight:
2314	if (micmute_led_registered)
2315	led_classdev_unregister(led_cdev: &micmute_led_cdev);
2316	if (mute_led_registered)
2317	led_classdev_unregister(led_cdev: &mute_led_cdev);
2318	fail_led:
2319	dell_cleanup_rfkill();
2320	fail_rfkill:
2321	platform_device_del(pdev: platform_device);
2322	fail_platform_device2:
2323	platform_device_put(pdev: platform_device);
2324	fail_platform_device1:
2325	platform_driver_unregister(&platform_driver);
2326	fail_platform_driver:
2327	return ret;
2328	}
2329
2330	static void __exit dell_exit(void)
2331	{
2332	dell_laptop_unregister_notifier(nb: &dell_laptop_notifier);
2333	debugfs_remove_recursive(dentry: dell_laptop_dir);
2334	if (quirks && quirks->touchpad_led)
2335	touchpad_led_exit();
2336	kbd_led_exit();
2337	backlight_device_unregister(bd: dell_backlight_device);
2338	if (micmute_led_registered)
2339	led_classdev_unregister(led_cdev: &micmute_led_cdev);
2340	if (mute_led_registered)
2341	led_classdev_unregister(led_cdev: &mute_led_cdev);
2342	dell_cleanup_rfkill();
2343	if (platform_device) {
2344	platform_device_unregister(platform_device);
2345	platform_driver_unregister(&platform_driver);
2346	}
2347	}
2348
2349	/* dell-rbtn.c driver export functions which will not work correctly (and could
2350	* cause kernel crash) if they are called before dell-rbtn.c init code. This is
2351	* not problem when dell-rbtn.c is compiled as external module. When both files
2352	* (dell-rbtn.c and dell-laptop.c) are compiled statically into kernel, then we
2353	* need to ensure that dell_init() will be called after initializing dell-rbtn.
2354	* This can be achieved by late_initcall() instead module_init().
2355	*/
2356	late_initcall(dell_init);
2357	module_exit(dell_exit);
2358
2359	MODULE_AUTHOR("Matthew Garrett <mjg@redhat.com>");
2360	MODULE_AUTHOR("Gabriele Mazzotta <gabriele.mzt@gmail.com>");
2361	MODULE_AUTHOR("Pali Rohár <pali@kernel.org>");
2362	MODULE_DESCRIPTION("Dell laptop driver");
2363	MODULE_LICENSE("GPL");
2364