xref: /linux/drivers/input/keyboard/atkbd.c (revision 913df4453f85f1fe79b35ecf3c9a0c0b707d22a2)
1 /*
2  * AT and PS/2 keyboard driver
3  *
4  * Copyright (c) 1999-2002 Vojtech Pavlik
5  */
6 
7 /*
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License version 2 as published by
10  * the Free Software Foundation.
11  */
12 
13 /*
14  * This driver can handle standard AT keyboards and PS/2 keyboards in
15  * Translated and Raw Set 2 and Set 3, as well as AT keyboards on dumb
16  * input-only controllers and AT keyboards connected over a one way RS232
17  * converter.
18  */
19 
20 #include <linux/delay.h>
21 #include <linux/module.h>
22 #include <linux/slab.h>
23 #include <linux/interrupt.h>
24 #include <linux/init.h>
25 #include <linux/input.h>
26 #include <linux/serio.h>
27 #include <linux/workqueue.h>
28 #include <linux/libps2.h>
29 #include <linux/mutex.h>
30 #include <linux/dmi.h>
31 
32 #define DRIVER_DESC	"AT and PS/2 keyboard driver"
33 
34 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
35 MODULE_DESCRIPTION(DRIVER_DESC);
36 MODULE_LICENSE("GPL");
37 
38 static int atkbd_set = 2;
39 module_param_named(set, atkbd_set, int, 0);
40 MODULE_PARM_DESC(set, "Select keyboard code set (2 = default, 3 = PS/2 native)");
41 
42 #if defined(__i386__) || defined(__x86_64__) || defined(__hppa__)
43 static int atkbd_reset;
44 #else
45 static int atkbd_reset = 1;
46 #endif
47 module_param_named(reset, atkbd_reset, bool, 0);
48 MODULE_PARM_DESC(reset, "Reset keyboard during initialization");
49 
50 static int atkbd_softrepeat;
51 module_param_named(softrepeat, atkbd_softrepeat, bool, 0);
52 MODULE_PARM_DESC(softrepeat, "Use software keyboard repeat");
53 
54 static int atkbd_softraw = 1;
55 module_param_named(softraw, atkbd_softraw, bool, 0);
56 MODULE_PARM_DESC(softraw, "Use software generated rawmode");
57 
58 static int atkbd_scroll;
59 module_param_named(scroll, atkbd_scroll, bool, 0);
60 MODULE_PARM_DESC(scroll, "Enable scroll-wheel on MS Office and similar keyboards");
61 
62 static int atkbd_extra;
63 module_param_named(extra, atkbd_extra, bool, 0);
64 MODULE_PARM_DESC(extra, "Enable extra LEDs and keys on IBM RapidAcces, EzKey and similar keyboards");
65 
66 /*
67  * Scancode to keycode tables. These are just the default setting, and
68  * are loadable via a userland utility.
69  */
70 
71 #define ATKBD_KEYMAP_SIZE	512
72 
73 static const unsigned short atkbd_set2_keycode[ATKBD_KEYMAP_SIZE] = {
74 
75 #ifdef CONFIG_KEYBOARD_ATKBD_HP_KEYCODES
76 
77 /* XXX: need a more general approach */
78 
79 #include "hpps2atkbd.h"	/* include the keyboard scancodes */
80 
81 #else
82 	  0, 67, 65, 63, 61, 59, 60, 88,  0, 68, 66, 64, 62, 15, 41,117,
83 	  0, 56, 42, 93, 29, 16,  2,  0,  0,  0, 44, 31, 30, 17,  3,  0,
84 	  0, 46, 45, 32, 18,  5,  4, 95,  0, 57, 47, 33, 20, 19,  6,183,
85 	  0, 49, 48, 35, 34, 21,  7,184,  0,  0, 50, 36, 22,  8,  9,185,
86 	  0, 51, 37, 23, 24, 11, 10,  0,  0, 52, 53, 38, 39, 25, 12,  0,
87 	  0, 89, 40,  0, 26, 13,  0,  0, 58, 54, 28, 27,  0, 43,  0, 85,
88 	  0, 86, 91, 90, 92,  0, 14, 94,  0, 79,124, 75, 71,121,  0,  0,
89 	 82, 83, 80, 76, 77, 72,  1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
90 
91 	  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,
92 	217,100,255,  0, 97,165,  0,  0,156,  0,  0,  0,  0,  0,  0,125,
93 	173,114,  0,113,  0,  0,  0,126,128,  0,  0,140,  0,  0,  0,127,
94 	159,  0,115,  0,164,  0,  0,116,158,  0,172,166,  0,  0,  0,142,
95 	157,  0,  0,  0,  0,  0,  0,  0,155,  0, 98,  0,  0,163,  0,  0,
96 	226,  0,  0,  0,  0,  0,  0,  0,  0,255, 96,  0,  0,  0,143,  0,
97 	  0,  0,  0,  0,  0,  0,  0,  0,  0,107,  0,105,102,  0,  0,112,
98 	110,111,108,112,106,103,  0,119,  0,118,109,  0, 99,104,119,  0,
99 
100 	  0,  0,  0, 65, 99,
101 #endif
102 };
103 
104 static const unsigned short atkbd_set3_keycode[ATKBD_KEYMAP_SIZE] = {
105 
106 	  0,  0,  0,  0,  0,  0,  0, 59,  1,138,128,129,130, 15, 41, 60,
107 	131, 29, 42, 86, 58, 16,  2, 61,133, 56, 44, 31, 30, 17,  3, 62,
108 	134, 46, 45, 32, 18,  5,  4, 63,135, 57, 47, 33, 20, 19,  6, 64,
109 	136, 49, 48, 35, 34, 21,  7, 65,137,100, 50, 36, 22,  8,  9, 66,
110 	125, 51, 37, 23, 24, 11, 10, 67,126, 52, 53, 38, 39, 25, 12, 68,
111 	113,114, 40, 43, 26, 13, 87, 99, 97, 54, 28, 27, 43, 43, 88, 70,
112 	108,105,119,103,111,107, 14,110,  0, 79,106, 75, 71,109,102,104,
113 	 82, 83, 80, 76, 77, 72, 69, 98,  0, 96, 81,  0, 78, 73, 55,183,
114 
115 	184,185,186,187, 74, 94, 92, 93,  0,  0,  0,125,126,127,112,  0,
116 	  0,139,172,163,165,115,152,172,166,140,160,154,113,114,167,168,
117 	148,149,147,140
118 };
119 
120 static const unsigned short atkbd_unxlate_table[128] = {
121           0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
122          21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
123          35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
124          50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88,  5,  6,  4, 12,  3,
125          11,  2, 10,  1,  9,119,126,108,117,125,123,107,115,116,121,105,
126         114,122,112,113,127, 96, 97,120,  7, 15, 23, 31, 39, 47, 55, 63,
127          71, 79, 86, 94,  8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
128          19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
129 };
130 
131 #define ATKBD_CMD_SETLEDS	0x10ed
132 #define ATKBD_CMD_GSCANSET	0x11f0
133 #define ATKBD_CMD_SSCANSET	0x10f0
134 #define ATKBD_CMD_GETID		0x02f2
135 #define ATKBD_CMD_SETREP	0x10f3
136 #define ATKBD_CMD_ENABLE	0x00f4
137 #define ATKBD_CMD_RESET_DIS	0x00f5
138 #define ATKBD_CMD_SETALL_MBR	0x00fa
139 #define ATKBD_CMD_RESET_BAT	0x02ff
140 #define ATKBD_CMD_RESEND	0x00fe
141 #define ATKBD_CMD_EX_ENABLE	0x10ea
142 #define ATKBD_CMD_EX_SETLEDS	0x20eb
143 #define ATKBD_CMD_OK_GETID	0x02e8
144 
145 #define ATKBD_RET_ACK		0xfa
146 #define ATKBD_RET_NAK		0xfe
147 #define ATKBD_RET_BAT		0xaa
148 #define ATKBD_RET_EMUL0		0xe0
149 #define ATKBD_RET_EMUL1		0xe1
150 #define ATKBD_RET_RELEASE	0xf0
151 #define ATKBD_RET_HANJA		0xf1
152 #define ATKBD_RET_HANGEUL	0xf2
153 #define ATKBD_RET_ERR		0xff
154 
155 #define ATKBD_KEY_UNKNOWN	  0
156 #define ATKBD_KEY_NULL		255
157 
158 #define ATKBD_SCR_1		254
159 #define ATKBD_SCR_2		253
160 #define ATKBD_SCR_4		252
161 #define ATKBD_SCR_8		251
162 #define ATKBD_SCR_CLICK		250
163 #define ATKBD_SCR_LEFT		249
164 #define ATKBD_SCR_RIGHT		248
165 
166 #define ATKBD_SPECIAL		ATKBD_SCR_RIGHT
167 
168 #define ATKBD_LED_EVENT_BIT	0
169 #define ATKBD_REP_EVENT_BIT	1
170 
171 #define ATKBD_XL_ERR		0x01
172 #define ATKBD_XL_BAT		0x02
173 #define ATKBD_XL_ACK		0x04
174 #define ATKBD_XL_NAK		0x08
175 #define ATKBD_XL_HANGEUL	0x10
176 #define ATKBD_XL_HANJA		0x20
177 
178 static const struct {
179 	unsigned char keycode;
180 	unsigned char set2;
181 } atkbd_scroll_keys[] = {
182 	{ ATKBD_SCR_1,     0xc5 },
183 	{ ATKBD_SCR_2,     0x9d },
184 	{ ATKBD_SCR_4,     0xa4 },
185 	{ ATKBD_SCR_8,     0x9b },
186 	{ ATKBD_SCR_CLICK, 0xe0 },
187 	{ ATKBD_SCR_LEFT,  0xcb },
188 	{ ATKBD_SCR_RIGHT, 0xd2 },
189 };
190 
191 /*
192  * The atkbd control structure
193  */
194 
195 struct atkbd {
196 
197 	struct ps2dev ps2dev;
198 	struct input_dev *dev;
199 
200 	/* Written only during init */
201 	char name[64];
202 	char phys[32];
203 
204 	unsigned short id;
205 	unsigned short keycode[ATKBD_KEYMAP_SIZE];
206 	DECLARE_BITMAP(force_release_mask, ATKBD_KEYMAP_SIZE);
207 	unsigned char set;
208 	unsigned char translated;
209 	unsigned char extra;
210 	unsigned char write;
211 	unsigned char softrepeat;
212 	unsigned char softraw;
213 	unsigned char scroll;
214 	unsigned char enabled;
215 
216 	/* Accessed only from interrupt */
217 	unsigned char emul;
218 	unsigned char resend;
219 	unsigned char release;
220 	unsigned long xl_bit;
221 	unsigned int last;
222 	unsigned long time;
223 	unsigned long err_count;
224 
225 	struct delayed_work event_work;
226 	unsigned long event_jiffies;
227 	struct mutex event_mutex;
228 	unsigned long event_mask;
229 };
230 
231 /*
232  * System-specific keymap fixup routine
233  */
234 static void (*atkbd_platform_fixup)(struct atkbd *, const void *data);
235 static void *atkbd_platform_fixup_data;
236 
237 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
238 				ssize_t (*handler)(struct atkbd *, char *));
239 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
240 				ssize_t (*handler)(struct atkbd *, const char *, size_t));
241 #define ATKBD_DEFINE_ATTR(_name)						\
242 static ssize_t atkbd_show_##_name(struct atkbd *, char *);			\
243 static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t);		\
244 static ssize_t atkbd_do_show_##_name(struct device *d,				\
245 				struct device_attribute *attr, char *b)		\
246 {										\
247 	return atkbd_attr_show_helper(d, b, atkbd_show_##_name);		\
248 }										\
249 static ssize_t atkbd_do_set_##_name(struct device *d,				\
250 			struct device_attribute *attr, const char *b, size_t s)	\
251 {										\
252 	return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name);		\
253 }										\
254 static struct device_attribute atkbd_attr_##_name =				\
255 	__ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
256 
257 ATKBD_DEFINE_ATTR(extra);
258 ATKBD_DEFINE_ATTR(force_release);
259 ATKBD_DEFINE_ATTR(scroll);
260 ATKBD_DEFINE_ATTR(set);
261 ATKBD_DEFINE_ATTR(softrepeat);
262 ATKBD_DEFINE_ATTR(softraw);
263 
264 #define ATKBD_DEFINE_RO_ATTR(_name)						\
265 static ssize_t atkbd_show_##_name(struct atkbd *, char *);			\
266 static ssize_t atkbd_do_show_##_name(struct device *d,				\
267 				struct device_attribute *attr, char *b)		\
268 {										\
269 	return atkbd_attr_show_helper(d, b, atkbd_show_##_name);		\
270 }										\
271 static struct device_attribute atkbd_attr_##_name =				\
272 	__ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
273 
274 ATKBD_DEFINE_RO_ATTR(err_count);
275 
276 static struct attribute *atkbd_attributes[] = {
277 	&atkbd_attr_extra.attr,
278 	&atkbd_attr_force_release.attr,
279 	&atkbd_attr_scroll.attr,
280 	&atkbd_attr_set.attr,
281 	&atkbd_attr_softrepeat.attr,
282 	&atkbd_attr_softraw.attr,
283 	&atkbd_attr_err_count.attr,
284 	NULL
285 };
286 
287 static struct attribute_group atkbd_attribute_group = {
288 	.attrs	= atkbd_attributes,
289 };
290 
291 static const unsigned int xl_table[] = {
292 	ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
293 	ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
294 };
295 
296 /*
297  * Checks if we should mangle the scancode to extract 'release' bit
298  * in translated mode.
299  */
300 static int atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
301 {
302 	int i;
303 
304 	if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
305 		return 0;
306 
307 	for (i = 0; i < ARRAY_SIZE(xl_table); i++)
308 		if (code == xl_table[i])
309 			return test_bit(i, &xl_bit);
310 
311 	return 1;
312 }
313 
314 /*
315  * Calculates new value of xl_bit so the driver can distinguish
316  * between make/break pair of scancodes for select keys and PS/2
317  * protocol responses.
318  */
319 static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
320 {
321 	int i;
322 
323 	for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
324 		if (!((code ^ xl_table[i]) & 0x7f)) {
325 			if (code & 0x80)
326 				__clear_bit(i, &atkbd->xl_bit);
327 			else
328 				__set_bit(i, &atkbd->xl_bit);
329 			break;
330 		}
331 	}
332 }
333 
334 /*
335  * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
336  * keeping kernel 2.4 compatibility for set 2
337  */
338 static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
339 {
340 	if (atkbd->set == 3) {
341 		if (atkbd->emul == 1)
342 			code |= 0x100;
343         } else {
344 		code = (code & 0x7f) | ((code & 0x80) << 1);
345 		if (atkbd->emul == 1)
346 			code |= 0x80;
347 	}
348 
349 	return code;
350 }
351 
352 /*
353  * atkbd_interrupt(). Here takes place processing of data received from
354  * the keyboard into events.
355  */
356 
357 static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
358 			unsigned int flags)
359 {
360 	struct atkbd *atkbd = serio_get_drvdata(serio);
361 	struct input_dev *dev = atkbd->dev;
362 	unsigned int code = data;
363 	int scroll = 0, hscroll = 0, click = -1;
364 	int value;
365 	unsigned short keycode;
366 
367 #ifdef ATKBD_DEBUG
368 	printk(KERN_DEBUG "atkbd.c: Received %02x flags %02x\n", data, flags);
369 #endif
370 
371 #if !defined(__i386__) && !defined (__x86_64__)
372 	if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
373 		printk(KERN_WARNING "atkbd.c: frame/parity error: %02x\n", flags);
374 		serio_write(serio, ATKBD_CMD_RESEND);
375 		atkbd->resend = 1;
376 		goto out;
377 	}
378 
379 	if (!flags && data == ATKBD_RET_ACK)
380 		atkbd->resend = 0;
381 #endif
382 
383 	if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
384 		if  (ps2_handle_ack(&atkbd->ps2dev, data))
385 			goto out;
386 
387 	if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
388 		if  (ps2_handle_response(&atkbd->ps2dev, data))
389 			goto out;
390 
391 	if (!atkbd->enabled)
392 		goto out;
393 
394 	input_event(dev, EV_MSC, MSC_RAW, code);
395 
396 	if (atkbd->translated) {
397 
398 		if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
399 			atkbd->release = code >> 7;
400 			code &= 0x7f;
401 		}
402 
403 		if (!atkbd->emul)
404 			atkbd_calculate_xl_bit(atkbd, data);
405 	}
406 
407 	switch (code) {
408 		case ATKBD_RET_BAT:
409 			atkbd->enabled = 0;
410 			serio_reconnect(atkbd->ps2dev.serio);
411 			goto out;
412 		case ATKBD_RET_EMUL0:
413 			atkbd->emul = 1;
414 			goto out;
415 		case ATKBD_RET_EMUL1:
416 			atkbd->emul = 2;
417 			goto out;
418 		case ATKBD_RET_RELEASE:
419 			atkbd->release = 1;
420 			goto out;
421 		case ATKBD_RET_ACK:
422 		case ATKBD_RET_NAK:
423 			if (printk_ratelimit())
424 				printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
425 				       "Some program might be trying access hardware directly.\n",
426 				       data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
427 			goto out;
428 		case ATKBD_RET_ERR:
429 			atkbd->err_count++;
430 #ifdef ATKBD_DEBUG
431 			printk(KERN_DEBUG "atkbd.c: Keyboard on %s reports too many keys pressed.\n", serio->phys);
432 #endif
433 			goto out;
434 	}
435 
436 	code = atkbd_compat_scancode(atkbd, code);
437 
438 	if (atkbd->emul && --atkbd->emul)
439 		goto out;
440 
441 	keycode = atkbd->keycode[code];
442 
443 	if (keycode != ATKBD_KEY_NULL)
444 		input_event(dev, EV_MSC, MSC_SCAN, code);
445 
446 	switch (keycode) {
447 		case ATKBD_KEY_NULL:
448 			break;
449 		case ATKBD_KEY_UNKNOWN:
450 			printk(KERN_WARNING
451 			       "atkbd.c: Unknown key %s (%s set %d, code %#x on %s).\n",
452 			       atkbd->release ? "released" : "pressed",
453 			       atkbd->translated ? "translated" : "raw",
454 			       atkbd->set, code, serio->phys);
455 			printk(KERN_WARNING
456 			       "atkbd.c: Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
457 			       code & 0x80 ? "e0" : "", code & 0x7f);
458 			input_sync(dev);
459 			break;
460 		case ATKBD_SCR_1:
461 			scroll = 1 - atkbd->release * 2;
462 			break;
463 		case ATKBD_SCR_2:
464 			scroll = 2 - atkbd->release * 4;
465 			break;
466 		case ATKBD_SCR_4:
467 			scroll = 4 - atkbd->release * 8;
468 			break;
469 		case ATKBD_SCR_8:
470 			scroll = 8 - atkbd->release * 16;
471 			break;
472 		case ATKBD_SCR_CLICK:
473 			click = !atkbd->release;
474 			break;
475 		case ATKBD_SCR_LEFT:
476 			hscroll = -1;
477 			break;
478 		case ATKBD_SCR_RIGHT:
479 			hscroll = 1;
480 			break;
481 		default:
482 			if (atkbd->release) {
483 				value = 0;
484 				atkbd->last = 0;
485 			} else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
486 				/* Workaround Toshiba laptop multiple keypress */
487 				value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
488 			} else {
489 				value = 1;
490 				atkbd->last = code;
491 				atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
492 			}
493 
494 			input_event(dev, EV_KEY, keycode, value);
495 			input_sync(dev);
496 
497 			if (value && test_bit(code, atkbd->force_release_mask)) {
498 				input_report_key(dev, keycode, 0);
499 				input_sync(dev);
500 			}
501 	}
502 
503 	if (atkbd->scroll) {
504 		if (click != -1)
505 			input_report_key(dev, BTN_MIDDLE, click);
506 		input_report_rel(dev, REL_WHEEL, scroll);
507 		input_report_rel(dev, REL_HWHEEL, hscroll);
508 		input_sync(dev);
509 	}
510 
511 	atkbd->release = 0;
512 out:
513 	return IRQ_HANDLED;
514 }
515 
516 static int atkbd_set_repeat_rate(struct atkbd *atkbd)
517 {
518 	const short period[32] =
519 		{ 33,  37,  42,  46,  50,  54,  58,  63,  67,  75,  83,  92, 100, 109, 116, 125,
520 		 133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
521 	const short delay[4] =
522 		{ 250, 500, 750, 1000 };
523 
524 	struct input_dev *dev = atkbd->dev;
525 	unsigned char param;
526 	int i = 0, j = 0;
527 
528 	while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
529 		i++;
530 	dev->rep[REP_PERIOD] = period[i];
531 
532 	while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
533 		j++;
534 	dev->rep[REP_DELAY] = delay[j];
535 
536 	param = i | (j << 5);
537 	return ps2_command(&atkbd->ps2dev, &param, ATKBD_CMD_SETREP);
538 }
539 
540 static int atkbd_set_leds(struct atkbd *atkbd)
541 {
542 	struct input_dev *dev = atkbd->dev;
543 	unsigned char param[2];
544 
545 	param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
546 		 | (test_bit(LED_NUML,    dev->led) ? 2 : 0)
547 		 | (test_bit(LED_CAPSL,   dev->led) ? 4 : 0);
548 	if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
549 		return -1;
550 
551 	if (atkbd->extra) {
552 		param[0] = 0;
553 		param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
554 			 | (test_bit(LED_SLEEP,   dev->led) ? 0x02 : 0)
555 			 | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
556 			 | (test_bit(LED_MISC,    dev->led) ? 0x10 : 0)
557 			 | (test_bit(LED_MUTE,    dev->led) ? 0x20 : 0);
558 		if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
559 			return -1;
560 	}
561 
562 	return 0;
563 }
564 
565 /*
566  * atkbd_event_work() is used to complete processing of events that
567  * can not be processed by input_event() which is often called from
568  * interrupt context.
569  */
570 
571 static void atkbd_event_work(struct work_struct *work)
572 {
573 	struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);
574 
575 	mutex_lock(&atkbd->event_mutex);
576 
577 	if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
578 		atkbd_set_leds(atkbd);
579 
580 	if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
581 		atkbd_set_repeat_rate(atkbd);
582 
583 	mutex_unlock(&atkbd->event_mutex);
584 }
585 
586 /*
587  * Schedule switch for execution. We need to throttle requests,
588  * otherwise keyboard may become unresponsive.
589  */
590 static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
591 {
592 	unsigned long delay = msecs_to_jiffies(50);
593 
594 	if (time_after(jiffies, atkbd->event_jiffies + delay))
595 		delay = 0;
596 
597 	atkbd->event_jiffies = jiffies;
598 	set_bit(event_bit, &atkbd->event_mask);
599 	wmb();
600 	schedule_delayed_work(&atkbd->event_work, delay);
601 }
602 
603 /*
604  * Event callback from the input module. Events that change the state of
605  * the hardware are processed here. If action can not be performed in
606  * interrupt context it is offloaded to atkbd_event_work.
607  */
608 
609 static int atkbd_event(struct input_dev *dev,
610 			unsigned int type, unsigned int code, int value)
611 {
612 	struct atkbd *atkbd = input_get_drvdata(dev);
613 
614 	if (!atkbd->write)
615 		return -1;
616 
617 	switch (type) {
618 
619 		case EV_LED:
620 			atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
621 			return 0;
622 
623 		case EV_REP:
624 			if (!atkbd->softrepeat)
625 				atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
626 			return 0;
627 	}
628 
629 	return -1;
630 }
631 
632 /*
633  * atkbd_enable() signals that interrupt handler is allowed to
634  * generate input events.
635  */
636 
637 static inline void atkbd_enable(struct atkbd *atkbd)
638 {
639 	serio_pause_rx(atkbd->ps2dev.serio);
640 	atkbd->enabled = 1;
641 	serio_continue_rx(atkbd->ps2dev.serio);
642 }
643 
644 /*
645  * atkbd_disable() tells input handler that all incoming data except
646  * for ACKs and command response should be dropped.
647  */
648 
649 static inline void atkbd_disable(struct atkbd *atkbd)
650 {
651 	serio_pause_rx(atkbd->ps2dev.serio);
652 	atkbd->enabled = 0;
653 	serio_continue_rx(atkbd->ps2dev.serio);
654 }
655 
656 /*
657  * atkbd_probe() probes for an AT keyboard on a serio port.
658  */
659 
660 static int atkbd_probe(struct atkbd *atkbd)
661 {
662 	struct ps2dev *ps2dev = &atkbd->ps2dev;
663 	unsigned char param[2];
664 
665 /*
666  * Some systems, where the bit-twiddling when testing the io-lines of the
667  * controller may confuse the keyboard need a full reset of the keyboard. On
668  * these systems the BIOS also usually doesn't do it for us.
669  */
670 
671 	if (atkbd_reset)
672 		if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
673 			printk(KERN_WARNING "atkbd.c: keyboard reset failed on %s\n", ps2dev->serio->phys);
674 
675 /*
676  * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
677  * Some keyboards report different values, but the first byte is always 0xab or
678  * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
679  * should make sure we don't try to set the LEDs on it.
680  */
681 
682 	param[0] = param[1] = 0xa5;	/* initialize with invalid values */
683 	if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
684 
685 /*
686  * If the get ID command failed, we check if we can at least set the LEDs on
687  * the keyboard. This should work on every keyboard out there. It also turns
688  * the LEDs off, which we want anyway.
689  */
690 		param[0] = 0;
691 		if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
692 			return -1;
693 		atkbd->id = 0xabba;
694 		return 0;
695 	}
696 
697 	if (!ps2_is_keyboard_id(param[0]))
698 		return -1;
699 
700 	atkbd->id = (param[0] << 8) | param[1];
701 
702 	if (atkbd->id == 0xaca1 && atkbd->translated) {
703 		printk(KERN_ERR "atkbd.c: NCD terminal keyboards are only supported on non-translating\n");
704 		printk(KERN_ERR "atkbd.c: controllers. Use i8042.direct=1 to disable translation.\n");
705 		return -1;
706 	}
707 
708 	return 0;
709 }
710 
711 /*
712  * atkbd_select_set checks if a keyboard has a working Set 3 support, and
713  * sets it into that. Unfortunately there are keyboards that can be switched
714  * to Set 3, but don't work well in that (BTC Multimedia ...)
715  */
716 
717 static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
718 {
719 	struct ps2dev *ps2dev = &atkbd->ps2dev;
720 	unsigned char param[2];
721 
722 	atkbd->extra = 0;
723 /*
724  * For known special keyboards we can go ahead and set the correct set.
725  * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
726  * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
727  */
728 
729 	if (atkbd->translated)
730 		return 2;
731 
732 	if (atkbd->id == 0xaca1) {
733 		param[0] = 3;
734 		ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
735 		return 3;
736 	}
737 
738 	if (allow_extra) {
739 		param[0] = 0x71;
740 		if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
741 			atkbd->extra = 1;
742 			return 2;
743 		}
744 	}
745 
746 	if (target_set != 3)
747 		return 2;
748 
749 	if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
750 		atkbd->id = param[0] << 8 | param[1];
751 		return 2;
752 	}
753 
754 	param[0] = 3;
755 	if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
756 		return 2;
757 
758 	param[0] = 0;
759 	if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
760 		return 2;
761 
762 	if (param[0] != 3) {
763 		param[0] = 2;
764 		if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
765 		return 2;
766 	}
767 
768 	ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
769 
770 	return 3;
771 }
772 
773 static int atkbd_activate(struct atkbd *atkbd)
774 {
775 	struct ps2dev *ps2dev = &atkbd->ps2dev;
776 
777 /*
778  * Enable the keyboard to receive keystrokes.
779  */
780 
781 	if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
782 		printk(KERN_ERR "atkbd.c: Failed to enable keyboard on %s\n",
783 			ps2dev->serio->phys);
784 		return -1;
785 	}
786 
787 	return 0;
788 }
789 
790 /*
791  * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
792  * reboot.
793  */
794 
795 static void atkbd_cleanup(struct serio *serio)
796 {
797 	struct atkbd *atkbd = serio_get_drvdata(serio);
798 
799 	atkbd_disable(atkbd);
800 	ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_BAT);
801 }
802 
803 
804 /*
805  * atkbd_disconnect() closes and frees.
806  */
807 
808 static void atkbd_disconnect(struct serio *serio)
809 {
810 	struct atkbd *atkbd = serio_get_drvdata(serio);
811 
812 	atkbd_disable(atkbd);
813 
814 	/* make sure we don't have a command in flight */
815 	cancel_delayed_work_sync(&atkbd->event_work);
816 
817 	sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
818 	input_unregister_device(atkbd->dev);
819 	serio_close(serio);
820 	serio_set_drvdata(serio, NULL);
821 	kfree(atkbd);
822 }
823 
824 /*
825  * generate release events for the keycodes given in data
826  */
827 static void atkbd_apply_forced_release_keylist(struct atkbd* atkbd,
828 						const void *data)
829 {
830 	const unsigned int *keys = data;
831 	unsigned int i;
832 
833 	if (atkbd->set == 2)
834 		for (i = 0; keys[i] != -1U; i++)
835 			__set_bit(keys[i], atkbd->force_release_mask);
836 }
837 
838 /*
839  * Most special keys (Fn+F?) on Dell laptops do not generate release
840  * events so we have to do it ourselves.
841  */
842 static unsigned int atkbd_dell_laptop_forced_release_keys[] = {
843 	0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8f, 0x93, -1U
844 };
845 
846 /*
847  * Perform fixup for HP system that doesn't generate release
848  * for its video switch
849  */
850 static unsigned int atkbd_hp_forced_release_keys[] = {
851 	0x94, -1U
852 };
853 
854 /*
855  * Inventec system with broken key release on volume keys
856  */
857 static unsigned int atkbd_inventec_forced_release_keys[] = {
858 	0xae, 0xb0, -1U
859 };
860 
861 /*
862  * Perform fixup for HP Pavilion ZV6100 laptop that doesn't generate release
863  * for its volume buttons
864  */
865 static unsigned int atkbd_hp_zv6100_forced_release_keys[] = {
866 	0xae, 0xb0, -1U
867 };
868 
869 /*
870  * Perform fixup for HP (Compaq) Presario R4000 R4100 R4200 that don't generate
871  * release for their volume buttons
872  */
873 static unsigned int atkbd_hp_r4000_forced_release_keys[] = {
874 	0xae, 0xb0, -1U
875 };
876 
877 /*
878  * Samsung NC10,NC20 with Fn+F? key release not working
879  */
880 static unsigned int atkbd_samsung_forced_release_keys[] = {
881 	0x82, 0x83, 0x84, 0x86, 0x88, 0x89, 0xb3, 0xf7, 0xf9, -1U
882 };
883 
884 /*
885  * The volume up and volume down special keys on a Fujitsu Amilo PA 1510 laptop
886  * do not generate release events so we have to do it ourselves.
887  */
888 static unsigned int atkbd_amilo_pa1510_forced_release_keys[] = {
889 	0xb0, 0xae, -1U
890 };
891 
892 /*
893  * Amilo Pi 3525 key release for Fn+Volume keys not working
894  */
895 static unsigned int atkbd_amilo_pi3525_forced_release_keys[] = {
896 	0x20, 0xa0, 0x2e, 0xae, 0x30, 0xb0, -1U
897 };
898 
899 /*
900  * Amilo Xi 3650 key release for light touch bar not working
901  */
902 static unsigned int atkbd_amilo_xi3650_forced_release_keys[] = {
903 	0x67, 0xed, 0x90, 0xa2, 0x99, 0xa4, 0xae, 0xb0, -1U
904 };
905 
906 /*
907  * Soltech TA12 system with broken key release on volume keys and mute key
908  */
909 static unsigned int atkdb_soltech_ta12_forced_release_keys[] = {
910 	0xa0, 0xae, 0xb0, -1U
911 };
912 
913 /*
914  * atkbd_set_keycode_table() initializes keyboard's keycode table
915  * according to the selected scancode set
916  */
917 
918 static void atkbd_set_keycode_table(struct atkbd *atkbd)
919 {
920 	unsigned int scancode;
921 	int i, j;
922 
923 	memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
924 	bitmap_zero(atkbd->force_release_mask, ATKBD_KEYMAP_SIZE);
925 
926 	if (atkbd->translated) {
927 		for (i = 0; i < 128; i++) {
928 			scancode = atkbd_unxlate_table[i];
929 			atkbd->keycode[i] = atkbd_set2_keycode[scancode];
930 			atkbd->keycode[i | 0x80] = atkbd_set2_keycode[scancode | 0x80];
931 			if (atkbd->scroll)
932 				for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
933 					if ((scancode | 0x80) == atkbd_scroll_keys[j].set2)
934 						atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
935 		}
936 	} else if (atkbd->set == 3) {
937 		memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
938 	} else {
939 		memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));
940 
941 		if (atkbd->scroll)
942 			for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++) {
943 				scancode = atkbd_scroll_keys[i].set2;
944 				atkbd->keycode[scancode] = atkbd_scroll_keys[i].keycode;
945 		}
946 	}
947 
948 /*
949  * HANGEUL and HANJA keys do not send release events so we need to
950  * generate such events ourselves
951  */
952 	scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL);
953 	atkbd->keycode[scancode] = KEY_HANGEUL;
954 	__set_bit(scancode, atkbd->force_release_mask);
955 
956 	scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA);
957 	atkbd->keycode[scancode] = KEY_HANJA;
958 	__set_bit(scancode, atkbd->force_release_mask);
959 
960 /*
961  * Perform additional fixups
962  */
963 	if (atkbd_platform_fixup)
964 		atkbd_platform_fixup(atkbd, atkbd_platform_fixup_data);
965 }
966 
967 /*
968  * atkbd_set_device_attrs() sets up keyboard's input device structure
969  */
970 
971 static void atkbd_set_device_attrs(struct atkbd *atkbd)
972 {
973 	struct input_dev *input_dev = atkbd->dev;
974 	int i;
975 
976 	if (atkbd->extra)
977 		snprintf(atkbd->name, sizeof(atkbd->name),
978 			 "AT Set 2 Extra keyboard");
979 	else
980 		snprintf(atkbd->name, sizeof(atkbd->name),
981 			 "AT %s Set %d keyboard",
982 			 atkbd->translated ? "Translated" : "Raw", atkbd->set);
983 
984 	snprintf(atkbd->phys, sizeof(atkbd->phys),
985 		 "%s/input0", atkbd->ps2dev.serio->phys);
986 
987 	input_dev->name = atkbd->name;
988 	input_dev->phys = atkbd->phys;
989 	input_dev->id.bustype = BUS_I8042;
990 	input_dev->id.vendor = 0x0001;
991 	input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
992 	input_dev->id.version = atkbd->id;
993 	input_dev->event = atkbd_event;
994 	input_dev->dev.parent = &atkbd->ps2dev.serio->dev;
995 
996 	input_set_drvdata(input_dev, atkbd);
997 
998 	input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
999 		BIT_MASK(EV_MSC);
1000 
1001 	if (atkbd->write) {
1002 		input_dev->evbit[0] |= BIT_MASK(EV_LED);
1003 		input_dev->ledbit[0] = BIT_MASK(LED_NUML) |
1004 			BIT_MASK(LED_CAPSL) | BIT_MASK(LED_SCROLLL);
1005 	}
1006 
1007 	if (atkbd->extra)
1008 		input_dev->ledbit[0] |= BIT_MASK(LED_COMPOSE) |
1009 			BIT_MASK(LED_SUSPEND) | BIT_MASK(LED_SLEEP) |
1010 			BIT_MASK(LED_MUTE) | BIT_MASK(LED_MISC);
1011 
1012 	if (!atkbd->softrepeat) {
1013 		input_dev->rep[REP_DELAY] = 250;
1014 		input_dev->rep[REP_PERIOD] = 33;
1015 	}
1016 
1017 	input_dev->mscbit[0] = atkbd->softraw ? BIT_MASK(MSC_SCAN) :
1018 		BIT_MASK(MSC_RAW) | BIT_MASK(MSC_SCAN);
1019 
1020 	if (atkbd->scroll) {
1021 		input_dev->evbit[0] |= BIT_MASK(EV_REL);
1022 		input_dev->relbit[0] = BIT_MASK(REL_WHEEL) |
1023 			BIT_MASK(REL_HWHEEL);
1024 		__set_bit(BTN_MIDDLE, input_dev->keybit);
1025 	}
1026 
1027 	input_dev->keycode = atkbd->keycode;
1028 	input_dev->keycodesize = sizeof(unsigned short);
1029 	input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);
1030 
1031 	for (i = 0; i < ATKBD_KEYMAP_SIZE; i++)
1032 		if (atkbd->keycode[i] && atkbd->keycode[i] < ATKBD_SPECIAL)
1033 			__set_bit(atkbd->keycode[i], input_dev->keybit);
1034 }
1035 
1036 /*
1037  * atkbd_connect() is called when the serio module finds an interface
1038  * that isn't handled yet by an appropriate device driver. We check if
1039  * there is an AT keyboard out there and if yes, we register ourselves
1040  * to the input module.
1041  */
1042 
1043 static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
1044 {
1045 	struct atkbd *atkbd;
1046 	struct input_dev *dev;
1047 	int err = -ENOMEM;
1048 
1049 	atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
1050 	dev = input_allocate_device();
1051 	if (!atkbd || !dev)
1052 		goto fail1;
1053 
1054 	atkbd->dev = dev;
1055 	ps2_init(&atkbd->ps2dev, serio);
1056 	INIT_DELAYED_WORK(&atkbd->event_work, atkbd_event_work);
1057 	mutex_init(&atkbd->event_mutex);
1058 
1059 	switch (serio->id.type) {
1060 
1061 		case SERIO_8042_XL:
1062 			atkbd->translated = 1;
1063 		case SERIO_8042:
1064 			if (serio->write)
1065 				atkbd->write = 1;
1066 			break;
1067 	}
1068 
1069 	atkbd->softraw = atkbd_softraw;
1070 	atkbd->softrepeat = atkbd_softrepeat;
1071 	atkbd->scroll = atkbd_scroll;
1072 
1073 	if (atkbd->softrepeat)
1074 		atkbd->softraw = 1;
1075 
1076 	serio_set_drvdata(serio, atkbd);
1077 
1078 	err = serio_open(serio, drv);
1079 	if (err)
1080 		goto fail2;
1081 
1082 	if (atkbd->write) {
1083 
1084 		if (atkbd_probe(atkbd)) {
1085 			err = -ENODEV;
1086 			goto fail3;
1087 		}
1088 
1089 		atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
1090 		atkbd_activate(atkbd);
1091 
1092 	} else {
1093 		atkbd->set = 2;
1094 		atkbd->id = 0xab00;
1095 	}
1096 
1097 	atkbd_set_keycode_table(atkbd);
1098 	atkbd_set_device_attrs(atkbd);
1099 
1100 	err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group);
1101 	if (err)
1102 		goto fail3;
1103 
1104 	atkbd_enable(atkbd);
1105 
1106 	err = input_register_device(atkbd->dev);
1107 	if (err)
1108 		goto fail4;
1109 
1110 	return 0;
1111 
1112  fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
1113  fail3:	serio_close(serio);
1114  fail2:	serio_set_drvdata(serio, NULL);
1115  fail1:	input_free_device(dev);
1116 	kfree(atkbd);
1117 	return err;
1118 }
1119 
1120 /*
1121  * atkbd_reconnect() tries to restore keyboard into a sane state and is
1122  * most likely called on resume.
1123  */
1124 
1125 static int atkbd_reconnect(struct serio *serio)
1126 {
1127 	struct atkbd *atkbd = serio_get_drvdata(serio);
1128 	struct serio_driver *drv = serio->drv;
1129 
1130 	if (!atkbd || !drv) {
1131 		printk(KERN_DEBUG "atkbd: reconnect request, but serio is disconnected, ignoring...\n");
1132 		return -1;
1133 	}
1134 
1135 	atkbd_disable(atkbd);
1136 
1137 	if (atkbd->write) {
1138 		if (atkbd_probe(atkbd))
1139 			return -1;
1140 		if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
1141 			return -1;
1142 
1143 		atkbd_activate(atkbd);
1144 	}
1145 
1146 	atkbd_enable(atkbd);
1147 
1148 	return 0;
1149 }
1150 
1151 static struct serio_device_id atkbd_serio_ids[] = {
1152 	{
1153 		.type	= SERIO_8042,
1154 		.proto	= SERIO_ANY,
1155 		.id	= SERIO_ANY,
1156 		.extra	= SERIO_ANY,
1157 	},
1158 	{
1159 		.type	= SERIO_8042_XL,
1160 		.proto	= SERIO_ANY,
1161 		.id	= SERIO_ANY,
1162 		.extra	= SERIO_ANY,
1163 	},
1164 	{
1165 		.type	= SERIO_RS232,
1166 		.proto	= SERIO_PS2SER,
1167 		.id	= SERIO_ANY,
1168 		.extra	= SERIO_ANY,
1169 	},
1170 	{ 0 }
1171 };
1172 
1173 MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);
1174 
1175 static struct serio_driver atkbd_drv = {
1176 	.driver		= {
1177 		.name	= "atkbd",
1178 	},
1179 	.description	= DRIVER_DESC,
1180 	.id_table	= atkbd_serio_ids,
1181 	.interrupt	= atkbd_interrupt,
1182 	.connect	= atkbd_connect,
1183 	.reconnect	= atkbd_reconnect,
1184 	.disconnect	= atkbd_disconnect,
1185 	.cleanup	= atkbd_cleanup,
1186 };
1187 
1188 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
1189 				ssize_t (*handler)(struct atkbd *, char *))
1190 {
1191 	struct serio *serio = to_serio_port(dev);
1192 	int retval;
1193 
1194 	retval = serio_pin_driver(serio);
1195 	if (retval)
1196 		return retval;
1197 
1198 	if (serio->drv != &atkbd_drv) {
1199 		retval = -ENODEV;
1200 		goto out;
1201 	}
1202 
1203 	retval = handler((struct atkbd *)serio_get_drvdata(serio), buf);
1204 
1205 out:
1206 	serio_unpin_driver(serio);
1207 	return retval;
1208 }
1209 
1210 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
1211 				ssize_t (*handler)(struct atkbd *, const char *, size_t))
1212 {
1213 	struct serio *serio = to_serio_port(dev);
1214 	struct atkbd *atkbd;
1215 	int retval;
1216 
1217 	retval = serio_pin_driver(serio);
1218 	if (retval)
1219 		return retval;
1220 
1221 	if (serio->drv != &atkbd_drv) {
1222 		retval = -ENODEV;
1223 		goto out;
1224 	}
1225 
1226 	atkbd = serio_get_drvdata(serio);
1227 	atkbd_disable(atkbd);
1228 	retval = handler(atkbd, buf, count);
1229 	atkbd_enable(atkbd);
1230 
1231 out:
1232 	serio_unpin_driver(serio);
1233 	return retval;
1234 }
1235 
1236 static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
1237 {
1238 	return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
1239 }
1240 
1241 static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
1242 {
1243 	struct input_dev *old_dev, *new_dev;
1244 	unsigned long value;
1245 	int err;
1246 	unsigned char old_extra, old_set;
1247 
1248 	if (!atkbd->write)
1249 		return -EIO;
1250 
1251 	if (strict_strtoul(buf, 10, &value) || value > 1)
1252 		return -EINVAL;
1253 
1254 	if (atkbd->extra != value) {
1255 		/*
1256 		 * Since device's properties will change we need to
1257 		 * unregister old device. But allocate and register
1258 		 * new one first to make sure we have it.
1259 		 */
1260 		old_dev = atkbd->dev;
1261 		old_extra = atkbd->extra;
1262 		old_set = atkbd->set;
1263 
1264 		new_dev = input_allocate_device();
1265 		if (!new_dev)
1266 			return -ENOMEM;
1267 
1268 		atkbd->dev = new_dev;
1269 		atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
1270 		atkbd_activate(atkbd);
1271 		atkbd_set_keycode_table(atkbd);
1272 		atkbd_set_device_attrs(atkbd);
1273 
1274 		err = input_register_device(atkbd->dev);
1275 		if (err) {
1276 			input_free_device(new_dev);
1277 
1278 			atkbd->dev = old_dev;
1279 			atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1280 			atkbd_set_keycode_table(atkbd);
1281 			atkbd_set_device_attrs(atkbd);
1282 
1283 			return err;
1284 		}
1285 		input_unregister_device(old_dev);
1286 
1287 	}
1288 	return count;
1289 }
1290 
1291 static ssize_t atkbd_show_force_release(struct atkbd *atkbd, char *buf)
1292 {
1293 	size_t len = bitmap_scnlistprintf(buf, PAGE_SIZE - 2,
1294 			atkbd->force_release_mask, ATKBD_KEYMAP_SIZE);
1295 
1296 	buf[len++] = '\n';
1297 	buf[len] = '\0';
1298 
1299 	return len;
1300 }
1301 
1302 static ssize_t atkbd_set_force_release(struct atkbd *atkbd,
1303 					const char *buf, size_t count)
1304 {
1305 	/* 64 bytes on stack should be acceptable */
1306 	DECLARE_BITMAP(new_mask, ATKBD_KEYMAP_SIZE);
1307 	int err;
1308 
1309 	err = bitmap_parselist(buf, new_mask, ATKBD_KEYMAP_SIZE);
1310 	if (err)
1311 		return err;
1312 
1313 	memcpy(atkbd->force_release_mask, new_mask, sizeof(atkbd->force_release_mask));
1314 	return count;
1315 }
1316 
1317 
1318 static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
1319 {
1320 	return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
1321 }
1322 
1323 static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
1324 {
1325 	struct input_dev *old_dev, *new_dev;
1326 	unsigned long value;
1327 	int err;
1328 	unsigned char old_scroll;
1329 
1330 	if (strict_strtoul(buf, 10, &value) || value > 1)
1331 		return -EINVAL;
1332 
1333 	if (atkbd->scroll != value) {
1334 		old_dev = atkbd->dev;
1335 		old_scroll = atkbd->scroll;
1336 
1337 		new_dev = input_allocate_device();
1338 		if (!new_dev)
1339 			return -ENOMEM;
1340 
1341 		atkbd->dev = new_dev;
1342 		atkbd->scroll = value;
1343 		atkbd_set_keycode_table(atkbd);
1344 		atkbd_set_device_attrs(atkbd);
1345 
1346 		err = input_register_device(atkbd->dev);
1347 		if (err) {
1348 			input_free_device(new_dev);
1349 
1350 			atkbd->scroll = old_scroll;
1351 			atkbd->dev = old_dev;
1352 			atkbd_set_keycode_table(atkbd);
1353 			atkbd_set_device_attrs(atkbd);
1354 
1355 			return err;
1356 		}
1357 		input_unregister_device(old_dev);
1358 	}
1359 	return count;
1360 }
1361 
1362 static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
1363 {
1364 	return sprintf(buf, "%d\n", atkbd->set);
1365 }
1366 
1367 static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
1368 {
1369 	struct input_dev *old_dev, *new_dev;
1370 	unsigned long value;
1371 	int err;
1372 	unsigned char old_set, old_extra;
1373 
1374 	if (!atkbd->write)
1375 		return -EIO;
1376 
1377 	if (strict_strtoul(buf, 10, &value) || (value != 2 && value != 3))
1378 		return -EINVAL;
1379 
1380 	if (atkbd->set != value) {
1381 		old_dev = atkbd->dev;
1382 		old_extra = atkbd->extra;
1383 		old_set = atkbd->set;
1384 
1385 		new_dev = input_allocate_device();
1386 		if (!new_dev)
1387 			return -ENOMEM;
1388 
1389 		atkbd->dev = new_dev;
1390 		atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
1391 		atkbd_activate(atkbd);
1392 		atkbd_set_keycode_table(atkbd);
1393 		atkbd_set_device_attrs(atkbd);
1394 
1395 		err = input_register_device(atkbd->dev);
1396 		if (err) {
1397 			input_free_device(new_dev);
1398 
1399 			atkbd->dev = old_dev;
1400 			atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1401 			atkbd_set_keycode_table(atkbd);
1402 			atkbd_set_device_attrs(atkbd);
1403 
1404 			return err;
1405 		}
1406 		input_unregister_device(old_dev);
1407 	}
1408 	return count;
1409 }
1410 
1411 static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf)
1412 {
1413 	return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
1414 }
1415 
1416 static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count)
1417 {
1418 	struct input_dev *old_dev, *new_dev;
1419 	unsigned long value;
1420 	int err;
1421 	unsigned char old_softrepeat, old_softraw;
1422 
1423 	if (!atkbd->write)
1424 		return -EIO;
1425 
1426 	if (strict_strtoul(buf, 10, &value) || value > 1)
1427 		return -EINVAL;
1428 
1429 	if (atkbd->softrepeat != value) {
1430 		old_dev = atkbd->dev;
1431 		old_softrepeat = atkbd->softrepeat;
1432 		old_softraw = atkbd->softraw;
1433 
1434 		new_dev = input_allocate_device();
1435 		if (!new_dev)
1436 			return -ENOMEM;
1437 
1438 		atkbd->dev = new_dev;
1439 		atkbd->softrepeat = value;
1440 		if (atkbd->softrepeat)
1441 			atkbd->softraw = 1;
1442 		atkbd_set_device_attrs(atkbd);
1443 
1444 		err = input_register_device(atkbd->dev);
1445 		if (err) {
1446 			input_free_device(new_dev);
1447 
1448 			atkbd->dev = old_dev;
1449 			atkbd->softrepeat = old_softrepeat;
1450 			atkbd->softraw = old_softraw;
1451 			atkbd_set_device_attrs(atkbd);
1452 
1453 			return err;
1454 		}
1455 		input_unregister_device(old_dev);
1456 	}
1457 	return count;
1458 }
1459 
1460 
1461 static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
1462 {
1463 	return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
1464 }
1465 
1466 static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
1467 {
1468 	struct input_dev *old_dev, *new_dev;
1469 	unsigned long value;
1470 	int err;
1471 	unsigned char old_softraw;
1472 
1473 	if (strict_strtoul(buf, 10, &value) || value > 1)
1474 		return -EINVAL;
1475 
1476 	if (atkbd->softraw != value) {
1477 		old_dev = atkbd->dev;
1478 		old_softraw = atkbd->softraw;
1479 
1480 		new_dev = input_allocate_device();
1481 		if (!new_dev)
1482 			return -ENOMEM;
1483 
1484 		atkbd->dev = new_dev;
1485 		atkbd->softraw = value;
1486 		atkbd_set_device_attrs(atkbd);
1487 
1488 		err = input_register_device(atkbd->dev);
1489 		if (err) {
1490 			input_free_device(new_dev);
1491 
1492 			atkbd->dev = old_dev;
1493 			atkbd->softraw = old_softraw;
1494 			atkbd_set_device_attrs(atkbd);
1495 
1496 			return err;
1497 		}
1498 		input_unregister_device(old_dev);
1499 	}
1500 	return count;
1501 }
1502 
1503 static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
1504 {
1505 	return sprintf(buf, "%lu\n", atkbd->err_count);
1506 }
1507 
1508 static int __init atkbd_setup_forced_release(const struct dmi_system_id *id)
1509 {
1510 	atkbd_platform_fixup = atkbd_apply_forced_release_keylist;
1511 	atkbd_platform_fixup_data = id->driver_data;
1512 
1513 	return 0;
1514 }
1515 
1516 static struct dmi_system_id atkbd_dmi_quirk_table[] __initdata = {
1517 	{
1518 		.ident = "Dell Laptop",
1519 		.matches = {
1520 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
1521 			DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1522 		},
1523 		.callback = atkbd_setup_forced_release,
1524 		.driver_data = atkbd_dell_laptop_forced_release_keys,
1525 	},
1526 	{
1527 		.ident = "Dell Laptop",
1528 		.matches = {
1529 			DMI_MATCH(DMI_SYS_VENDOR, "Dell Computer Corporation"),
1530 			DMI_MATCH(DMI_CHASSIS_TYPE, "8"), /* Portable */
1531 		},
1532 		.callback = atkbd_setup_forced_release,
1533 		.driver_data = atkbd_dell_laptop_forced_release_keys,
1534 	},
1535 	{
1536 		.ident = "HP 2133",
1537 		.matches = {
1538 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1539 			DMI_MATCH(DMI_PRODUCT_NAME, "HP 2133"),
1540 		},
1541 		.callback = atkbd_setup_forced_release,
1542 		.driver_data = atkbd_hp_forced_release_keys,
1543 	},
1544 	{
1545 		.ident = "HP Pavilion ZV6100",
1546 		.matches = {
1547 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1548 			DMI_MATCH(DMI_PRODUCT_NAME, "Pavilion ZV6100"),
1549 		},
1550 		.callback = atkbd_setup_forced_release,
1551 		.driver_data = atkbd_hp_zv6100_forced_release_keys,
1552 	},
1553 	{
1554 		.ident = "HP Presario R4000",
1555 		.matches = {
1556 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1557 			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4000"),
1558 		},
1559 		.callback = atkbd_setup_forced_release,
1560 		.driver_data = atkbd_hp_r4000_forced_release_keys,
1561 	},
1562 	{
1563 		.ident = "HP Presario R4100",
1564 		.matches = {
1565 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1566 			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4100"),
1567 		},
1568 		.callback = atkbd_setup_forced_release,
1569 		.driver_data = atkbd_hp_r4000_forced_release_keys,
1570 	},
1571 	{
1572 		.ident = "HP Presario R4200",
1573 		.matches = {
1574 			DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"),
1575 			DMI_MATCH(DMI_PRODUCT_NAME, "Presario R4200"),
1576 		},
1577 		.callback = atkbd_setup_forced_release,
1578 		.driver_data = atkbd_hp_r4000_forced_release_keys,
1579 	},
1580 	{
1581 		.ident = "Inventec Symphony",
1582 		.matches = {
1583 			DMI_MATCH(DMI_SYS_VENDOR, "INVENTEC"),
1584 			DMI_MATCH(DMI_PRODUCT_NAME, "SYMPHONY 6.0/7.0"),
1585 		},
1586 		.callback = atkbd_setup_forced_release,
1587 		.driver_data = atkbd_inventec_forced_release_keys,
1588 	},
1589 	{
1590 		.ident = "Samsung NC10",
1591 		.matches = {
1592 			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1593 			DMI_MATCH(DMI_PRODUCT_NAME, "NC10"),
1594 		},
1595 		.callback = atkbd_setup_forced_release,
1596 		.driver_data = atkbd_samsung_forced_release_keys,
1597 	},
1598 	{
1599 		.ident = "Samsung NC20",
1600 		.matches = {
1601 			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1602 			DMI_MATCH(DMI_PRODUCT_NAME, "NC20"),
1603 		},
1604 		.callback = atkbd_setup_forced_release,
1605 		.driver_data = atkbd_samsung_forced_release_keys,
1606 	},
1607 	{
1608 		.ident = "Samsung SQ45S70S",
1609 		.matches = {
1610 			DMI_MATCH(DMI_SYS_VENDOR, "SAMSUNG ELECTRONICS CO., LTD."),
1611 			DMI_MATCH(DMI_PRODUCT_NAME, "SQ45S70S"),
1612 		},
1613 		.callback = atkbd_setup_forced_release,
1614 		.driver_data = atkbd_samsung_forced_release_keys,
1615 	},
1616 	{
1617 		.ident = "Fujitsu Amilo PA 1510",
1618 		.matches = {
1619 			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1620 			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pa 1510"),
1621 		},
1622 		.callback = atkbd_setup_forced_release,
1623 		.driver_data = atkbd_amilo_pa1510_forced_release_keys,
1624 	},
1625 	{
1626 		.ident = "Fujitsu Amilo Pi 3525",
1627 		.matches = {
1628 			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1629 			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Pi 3525"),
1630 		},
1631 		.callback = atkbd_setup_forced_release,
1632 		.driver_data = atkbd_amilo_pi3525_forced_release_keys,
1633 	},
1634 	{
1635 		.ident = "Fujitsu Amilo Xi 3650",
1636 		.matches = {
1637 			DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU SIEMENS"),
1638 			DMI_MATCH(DMI_PRODUCT_NAME, "AMILO Xi 3650"),
1639 		},
1640 		.callback = atkbd_setup_forced_release,
1641 		.driver_data = atkbd_amilo_xi3650_forced_release_keys,
1642 	},
1643 	{
1644 		.ident = "Soltech Corporation TA12",
1645 		.matches = {
1646 			DMI_MATCH(DMI_SYS_VENDOR, "Soltech Corporation"),
1647 			DMI_MATCH(DMI_PRODUCT_NAME, "TA12"),
1648 		},
1649 		.callback = atkbd_setup_forced_release,
1650 		.driver_data = atkdb_soltech_ta12_forced_release_keys,
1651 	},
1652 	{ }
1653 };
1654 
1655 static int __init atkbd_init(void)
1656 {
1657 	dmi_check_system(atkbd_dmi_quirk_table);
1658 
1659 	return serio_register_driver(&atkbd_drv);
1660 }
1661 
1662 static void __exit atkbd_exit(void)
1663 {
1664 	serio_unregister_driver(&atkbd_drv);
1665 }
1666 
1667 module_init(atkbd_init);
1668 module_exit(atkbd_exit);
1669