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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / input / keyboard / atkbd.c
blob4a95adc4cc7839380baa08e2a23e5a882e64d741
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 an userland utility.
69 */
70
71 static unsigned char atkbd_set2_keycode[512] = {
72
73 #ifdef CONFIG_KEYBOARD_ATKBD_HP_KEYCODES
74
75 /* XXX: need a more general approach */
76
77 #include "hpps2atkbd.h" /* include the keyboard scancodes */
78
79 #else
80 0, 67, 65, 63, 61, 59, 60, 88, 0, 68, 66, 64, 62, 15, 41,117,
81 0, 56, 42, 93, 29, 16, 2, 0, 0, 0, 44, 31, 30, 17, 3, 0,
82 0, 46, 45, 32, 18, 5, 4, 95, 0, 57, 47, 33, 20, 19, 6,183,
83 0, 49, 48, 35, 34, 21, 7,184, 0, 0, 50, 36, 22, 8, 9,185,
84 0, 51, 37, 23, 24, 11, 10, 0, 0, 52, 53, 38, 39, 25, 12, 0,
85 0, 89, 40, 0, 26, 13, 0, 0, 58, 54, 28, 27, 0, 43, 0, 85,
86 0, 86, 91, 90, 92, 0, 14, 94, 0, 79,124, 75, 71,121, 0, 0,
87 82, 83, 80, 76, 77, 72, 1, 69, 87, 78, 81, 74, 55, 73, 70, 99,
88
89 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
90 217,100,255, 0, 97,165, 0, 0,156, 0, 0, 0, 0, 0, 0,125,
91 173,114, 0,113, 0, 0, 0,126,128, 0, 0,140, 0, 0, 0,127,
92 159, 0,115, 0,164, 0, 0,116,158, 0,172,166, 0, 0, 0,142,
93 157, 0, 0, 0, 0, 0, 0, 0,155, 0, 98, 0, 0,163, 0, 0,
94 226, 0, 0, 0, 0, 0, 0, 0, 0,255, 96, 0, 0, 0,143, 0,
95 0, 0, 0, 0, 0, 0, 0, 0, 0,107, 0,105,102, 0, 0,112,
96 110,111,108,112,106,103, 0,119, 0,118,109, 0, 99,104,119, 0,
97
98 0, 0, 0, 65, 99,
99 #endif
100 };
101
102 static unsigned char atkbd_set3_keycode[512] = {
103
104 0, 0, 0, 0, 0, 0, 0, 59, 1,138,128,129,130, 15, 41, 60,
105 131, 29, 42, 86, 58, 16, 2, 61,133, 56, 44, 31, 30, 17, 3, 62,
106 134, 46, 45, 32, 18, 5, 4, 63,135, 57, 47, 33, 20, 19, 6, 64,
107 136, 49, 48, 35, 34, 21, 7, 65,137,100, 50, 36, 22, 8, 9, 66,
108 125, 51, 37, 23, 24, 11, 10, 67,126, 52, 53, 38, 39, 25, 12, 68,
109 113,114, 40, 43, 26, 13, 87, 99, 97, 54, 28, 27, 43, 43, 88, 70,
110 108,105,119,103,111,107, 14,110, 0, 79,106, 75, 71,109,102,104,
111 82, 83, 80, 76, 77, 72, 69, 98, 0, 96, 81, 0, 78, 73, 55,183,
112
113 184,185,186,187, 74, 94, 92, 93, 0, 0, 0,125,126,127,112, 0,
114 0,139,172,163,165,115,152,172,166,140,160,154,113,114,167,168,
115 148,149,147,140
116 };
117
118 static unsigned char atkbd_unxlate_table[128] = {
119 0,118, 22, 30, 38, 37, 46, 54, 61, 62, 70, 69, 78, 85,102, 13,
120 21, 29, 36, 45, 44, 53, 60, 67, 68, 77, 84, 91, 90, 20, 28, 27,
121 35, 43, 52, 51, 59, 66, 75, 76, 82, 14, 18, 93, 26, 34, 33, 42,
122 50, 49, 58, 65, 73, 74, 89,124, 17, 41, 88, 5, 6, 4, 12, 3,
123 11, 2, 10, 1, 9,119,126,108,117,125,123,107,115,116,121,105,
124 114,122,112,113,127, 96, 97,120, 7, 15, 23, 31, 39, 47, 55, 63,
125 71, 79, 86, 94, 8, 16, 24, 32, 40, 48, 56, 64, 72, 80, 87,111,
126 19, 25, 57, 81, 83, 92, 95, 98, 99,100,101,103,104,106,109,110
127 };
128
129 #define ATKBD_CMD_SETLEDS 0x10ed
130 #define ATKBD_CMD_GSCANSET 0x11f0
131 #define ATKBD_CMD_SSCANSET 0x10f0
132 #define ATKBD_CMD_GETID 0x02f2
133 #define ATKBD_CMD_SETREP 0x10f3
134 #define ATKBD_CMD_ENABLE 0x00f4
135 #define ATKBD_CMD_RESET_DIS 0x00f5
136 #define ATKBD_CMD_SETALL_MBR 0x00fa
137 #define ATKBD_CMD_RESET_BAT 0x02ff
138 #define ATKBD_CMD_RESEND 0x00fe
139 #define ATKBD_CMD_EX_ENABLE 0x10ea
140 #define ATKBD_CMD_EX_SETLEDS 0x20eb
141 #define ATKBD_CMD_OK_GETID 0x02e8
142
143 #define ATKBD_RET_ACK 0xfa
144 #define ATKBD_RET_NAK 0xfe
145 #define ATKBD_RET_BAT 0xaa
146 #define ATKBD_RET_EMUL0 0xe0
147 #define ATKBD_RET_EMUL1 0xe1
148 #define ATKBD_RET_RELEASE 0xf0
149 #define ATKBD_RET_HANJA 0xf1
150 #define ATKBD_RET_HANGEUL 0xf2
151 #define ATKBD_RET_ERR 0xff
152
153 #define ATKBD_KEY_UNKNOWN 0
154 #define ATKBD_KEY_NULL 255
155
156 #define ATKBD_SCR_1 254
157 #define ATKBD_SCR_2 253
158 #define ATKBD_SCR_4 252
159 #define ATKBD_SCR_8 251
160 #define ATKBD_SCR_CLICK 250
161 #define ATKBD_SCR_LEFT 249
162 #define ATKBD_SCR_RIGHT 248
163
164 #define ATKBD_SPECIAL 248
165
166 #define ATKBD_LED_EVENT_BIT 0
167 #define ATKBD_REP_EVENT_BIT 1
168
169 #define ATKBD_XL_ERR 0x01
170 #define ATKBD_XL_BAT 0x02
171 #define ATKBD_XL_ACK 0x04
172 #define ATKBD_XL_NAK 0x08
173 #define ATKBD_XL_HANGEUL 0x10
174 #define ATKBD_XL_HANJA 0x20
175
176 static struct {
177 unsigned char keycode;
178 unsigned char set2;
179 } atkbd_scroll_keys[] = {
180 { ATKBD_SCR_1, 0xc5 },
181 { ATKBD_SCR_2, 0x9d },
182 { ATKBD_SCR_4, 0xa4 },
183 { ATKBD_SCR_8, 0x9b },
184 { ATKBD_SCR_CLICK, 0xe0 },
185 { ATKBD_SCR_LEFT, 0xcb },
186 { ATKBD_SCR_RIGHT, 0xd2 },
187 };
188
189 /*
190 * The atkbd control structure
191 */
192
193 struct atkbd {
194
195 struct ps2dev ps2dev;
196 struct input_dev *dev;
197
198 /* Written only during init */
199 char name[64];
200 char phys[32];
201
202 unsigned short id;
203 unsigned char keycode[512];
204 DECLARE_BITMAP(force_release_mask, 512);
205 unsigned char set;
206 unsigned char translated;
207 unsigned char extra;
208 unsigned char write;
209 unsigned char softrepeat;
210 unsigned char softraw;
211 unsigned char scroll;
212 unsigned char enabled;
213
214 /* Accessed only from interrupt */
215 unsigned char emul;
216 unsigned char resend;
217 unsigned char release;
218 unsigned long xl_bit;
219 unsigned int last;
220 unsigned long time;
221 unsigned long err_count;
222
223 struct delayed_work event_work;
224 unsigned long event_jiffies;
225 struct mutex event_mutex;
226 unsigned long event_mask;
227 };
228
229 /*
230 * System-specific ketymap fixup routine
231 */
232 static void (*atkbd_platform_fixup)(struct atkbd *);
233
234 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
235 ssize_t (*handler)(struct atkbd *, char *));
236 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
237 ssize_t (*handler)(struct atkbd *, const char *, size_t));
238 #define ATKBD_DEFINE_ATTR(_name) \
239 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
240 static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t); \
241 static ssize_t atkbd_do_show_##_name(struct device *d, \
242 struct device_attribute *attr, char *b) \
243 { \
244 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
245 } \
246 static ssize_t atkbd_do_set_##_name(struct device *d, \
247 struct device_attribute *attr, const char *b, size_t s) \
248 { \
249 return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name); \
250 } \
251 static struct device_attribute atkbd_attr_##_name = \
252 __ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
253
254 ATKBD_DEFINE_ATTR(extra);
255 ATKBD_DEFINE_ATTR(scroll);
256 ATKBD_DEFINE_ATTR(set);
257 ATKBD_DEFINE_ATTR(softrepeat);
258 ATKBD_DEFINE_ATTR(softraw);
259
260 #define ATKBD_DEFINE_RO_ATTR(_name) \
261 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
262 static ssize_t atkbd_do_show_##_name(struct device *d, \
263 struct device_attribute *attr, char *b) \
264 { \
265 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
266 } \
267 static struct device_attribute atkbd_attr_##_name = \
268 __ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
269
270 ATKBD_DEFINE_RO_ATTR(err_count);
271
272 static struct attribute *atkbd_attributes[] = {
273 &atkbd_attr_extra.attr,
274 &atkbd_attr_scroll.attr,
275 &atkbd_attr_set.attr,
276 &atkbd_attr_softrepeat.attr,
277 &atkbd_attr_softraw.attr,
278 &atkbd_attr_err_count.attr,
279 NULL
280 };
281
282 static struct attribute_group atkbd_attribute_group = {
283 .attrs = atkbd_attributes,
284 };
285
286 static const unsigned int xl_table[] = {
287 ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
288 ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
289 };
290
291 /*
292 * Checks if we should mangle the scancode to extract 'release' bit
293 * in translated mode.
294 */
295 static int atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
296 {
297 int i;
298
299 if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
300 return 0;
301
302 for (i = 0; i < ARRAY_SIZE(xl_table); i++)
303 if (code == xl_table[i])
304 return test_bit(i, &xl_bit);
305
306 return 1;
307 }
308
309 /*
310 * Calculates new value of xl_bit so the driver can distinguish
311 * between make/break pair of scancodes for select keys and PS/2
312 * protocol responses.
313 */
314 static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
315 {
316 int i;
317
318 for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
319 if (!((code ^ xl_table[i]) & 0x7f)) {
320 if (code & 0x80)
321 __clear_bit(i, &atkbd->xl_bit);
322 else
323 __set_bit(i, &atkbd->xl_bit);
324 break;
325 }
326 }
327 }
328
329 /*
330 * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
331 * keeping kernel 2.4 compatibility for set 2
332 */
333 static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
334 {
335 if (atkbd->set == 3) {
336 if (atkbd->emul == 1)
337 code |= 0x100;
338 } else {
339 code = (code & 0x7f) | ((code & 0x80) << 1);
340 if (atkbd->emul == 1)
341 code |= 0x80;
342 }
343
344 return code;
345 }
346
347 /*
348 * atkbd_interrupt(). Here takes place processing of data received from
349 * the keyboard into events.
350 */
351
352 static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
353 unsigned int flags)
354 {
355 struct atkbd *atkbd = serio_get_drvdata(serio);
356 struct input_dev *dev = atkbd->dev;
357 unsigned int code = data;
358 int scroll = 0, hscroll = 0, click = -1;
359 int value;
360 unsigned char keycode;
361
362 #ifdef ATKBD_DEBUG
363 printk(KERN_DEBUG "atkbd.c: Received %02x flags %02x\n", data, flags);
364 #endif
365
366 #if !defined(__i386__) && !defined (__x86_64__)
367 if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
368 printk(KERN_WARNING "atkbd.c: frame/parity error: %02x\n", flags);
369 serio_write(serio, ATKBD_CMD_RESEND);
370 atkbd->resend = 1;
371 goto out;
372 }
373
374 if (!flags && data == ATKBD_RET_ACK)
375 atkbd->resend = 0;
376 #endif
377
378 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
379 if (ps2_handle_ack(&atkbd->ps2dev, data))
380 goto out;
381
382 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
383 if (ps2_handle_response(&atkbd->ps2dev, data))
384 goto out;
385
386 if (!atkbd->enabled)
387 goto out;
388
389 input_event(dev, EV_MSC, MSC_RAW, code);
390
391 if (atkbd->translated) {
392
393 if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
394 atkbd->release = code >> 7;
395 code &= 0x7f;
396 }
397
398 if (!atkbd->emul)
399 atkbd_calculate_xl_bit(atkbd, data);
400 }
401
402 switch (code) {
403 case ATKBD_RET_BAT:
404 atkbd->enabled = 0;
405 serio_reconnect(atkbd->ps2dev.serio);
406 goto out;
407 case ATKBD_RET_EMUL0:
408 atkbd->emul = 1;
409 goto out;
410 case ATKBD_RET_EMUL1:
411 atkbd->emul = 2;
412 goto out;
413 case ATKBD_RET_RELEASE:
414 atkbd->release = 1;
415 goto out;
416 case ATKBD_RET_ACK:
417 case ATKBD_RET_NAK:
418 if (printk_ratelimit())
419 printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
420 "Some program might be trying access hardware directly.\n",
421 data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
422 goto out;
423 case ATKBD_RET_ERR:
424 atkbd->err_count++;
425 #ifdef ATKBD_DEBUG
426 printk(KERN_DEBUG "atkbd.c: Keyboard on %s reports too many keys pressed.\n", serio->phys);
427 #endif
428 goto out;
429 }
430
431 code = atkbd_compat_scancode(atkbd, code);
432
433 if (atkbd->emul && --atkbd->emul)
434 goto out;
435
436 keycode = atkbd->keycode[code];
437
438 if (keycode != ATKBD_KEY_NULL)
439 input_event(dev, EV_MSC, MSC_SCAN, code);
440
441 switch (keycode) {
442 case ATKBD_KEY_NULL:
443 break;
444 case ATKBD_KEY_UNKNOWN:
445 printk(KERN_WARNING
446 "atkbd.c: Unknown key %s (%s set %d, code %#x on %s).\n",
447 atkbd->release ? "released" : "pressed",
448 atkbd->translated ? "translated" : "raw",
449 atkbd->set, code, serio->phys);
450 printk(KERN_WARNING
451 "atkbd.c: Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
452 code & 0x80 ? "e0" : "", code & 0x7f);
453 input_sync(dev);
454 break;
455 case ATKBD_SCR_1:
456 scroll = 1 - atkbd->release * 2;
457 break;
458 case ATKBD_SCR_2:
459 scroll = 2 - atkbd->release * 4;
460 break;
461 case ATKBD_SCR_4:
462 scroll = 4 - atkbd->release * 8;
463 break;
464 case ATKBD_SCR_8:
465 scroll = 8 - atkbd->release * 16;
466 break;
467 case ATKBD_SCR_CLICK:
468 click = !atkbd->release;
469 break;
470 case ATKBD_SCR_LEFT:
471 hscroll = -1;
472 break;
473 case ATKBD_SCR_RIGHT:
474 hscroll = 1;
475 break;
476 default:
477 if (atkbd->release) {
478 value = 0;
479 atkbd->last = 0;
480 } else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
481 /* Workaround Toshiba laptop multiple keypress */
482 value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
483 } else {
484 value = 1;
485 atkbd->last = code;
486 atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
487 }
488
489 input_event(dev, EV_KEY, keycode, value);
490 input_sync(dev);
491
492 if (value && test_bit(code, atkbd->force_release_mask)) {
493 input_report_key(dev, keycode, 0);
494 input_sync(dev);
495 }
496 }
497
498 if (atkbd->scroll) {
499 if (click != -1)
500 input_report_key(dev, BTN_MIDDLE, click);
501 input_report_rel(dev, REL_WHEEL, scroll);
502 input_report_rel(dev, REL_HWHEEL, hscroll);
503 input_sync(dev);
504 }
505
506 atkbd->release = 0;
507 out:
508 return IRQ_HANDLED;
509 }
510
511 static int atkbd_set_repeat_rate(struct atkbd *atkbd)
512 {
513 const short period[32] =
514 { 33, 37, 42, 46, 50, 54, 58, 63, 67, 75, 83, 92, 100, 109, 116, 125,
515 133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
516 const short delay[4] =
517 { 250, 500, 750, 1000 };
518
519 struct input_dev *dev = atkbd->dev;
520 unsigned char param;
521 int i = 0, j = 0;
522
523 while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
524 i++;
525 dev->rep[REP_PERIOD] = period[i];
526
527 while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
528 j++;
529 dev->rep[REP_DELAY] = delay[j];
530
531 param = i | (j << 5);
532 return ps2_command(&atkbd->ps2dev, &param, ATKBD_CMD_SETREP);
533 }
534
535 static int atkbd_set_leds(struct atkbd *atkbd)
536 {
537 struct input_dev *dev = atkbd->dev;
538 unsigned char param[2];
539
540 param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
541 | (test_bit(LED_NUML, dev->led) ? 2 : 0)
542 | (test_bit(LED_CAPSL, dev->led) ? 4 : 0);
543 if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
544 return -1;
545
546 if (atkbd->extra) {
547 param[0] = 0;
548 param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
549 | (test_bit(LED_SLEEP, dev->led) ? 0x02 : 0)
550 | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
551 | (test_bit(LED_MISC, dev->led) ? 0x10 : 0)
552 | (test_bit(LED_MUTE, dev->led) ? 0x20 : 0);
553 if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
554 return -1;
555 }
556
557 return 0;
558 }
559
560 /*
561 * atkbd_event_work() is used to complete processing of events that
562 * can not be processed by input_event() which is often called from
563 * interrupt context.
564 */
565
566 static void atkbd_event_work(struct work_struct *work)
567 {
568 struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);
569
570 mutex_lock(&atkbd->event_mutex);
571
572 if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
573 atkbd_set_leds(atkbd);
574
575 if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
576 atkbd_set_repeat_rate(atkbd);
577
578 mutex_unlock(&atkbd->event_mutex);
579 }
580
581 /*
582 * Schedule switch for execution. We need to throttle requests,
583 * otherwise keyboard may become unresponsive.
584 */
585 static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
586 {
587 unsigned long delay = msecs_to_jiffies(50);
588
589 if (time_after(jiffies, atkbd->event_jiffies + delay))
590 delay = 0;
591
592 atkbd->event_jiffies = jiffies;
593 set_bit(event_bit, &atkbd->event_mask);
594 wmb();
595 schedule_delayed_work(&atkbd->event_work, delay);
596 }
597
598 /*
599 * Event callback from the input module. Events that change the state of
600 * the hardware are processed here. If action can not be performed in
601 * interrupt context it is offloaded to atkbd_event_work.
602 */
603
604 static int atkbd_event(struct input_dev *dev,
605 unsigned int type, unsigned int code, int value)
606 {
607 struct atkbd *atkbd = input_get_drvdata(dev);
608
609 if (!atkbd->write)
610 return -1;
611
612 switch (type) {
613
614 case EV_LED:
615 atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
616 return 0;
617
618 case EV_REP:
619 if (!atkbd->softrepeat)
620 atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
621 return 0;
622 }
623
624 return -1;
625 }
626
627 /*
628 * atkbd_enable() signals that interrupt handler is allowed to
629 * generate input events.
630 */
631
632 static inline void atkbd_enable(struct atkbd *atkbd)
633 {
634 serio_pause_rx(atkbd->ps2dev.serio);
635 atkbd->enabled = 1;
636 serio_continue_rx(atkbd->ps2dev.serio);
637 }
638
639 /*
640 * atkbd_disable() tells input handler that all incoming data except
641 * for ACKs and command response should be dropped.
642 */
643
644 static inline void atkbd_disable(struct atkbd *atkbd)
645 {
646 serio_pause_rx(atkbd->ps2dev.serio);
647 atkbd->enabled = 0;
648 serio_continue_rx(atkbd->ps2dev.serio);
649 }
650
651 /*
652 * atkbd_probe() probes for an AT keyboard on a serio port.
653 */
654
655 static int atkbd_probe(struct atkbd *atkbd)
656 {
657 struct ps2dev *ps2dev = &atkbd->ps2dev;
658 unsigned char param[2];
659
660 /*
661 * Some systems, where the bit-twiddling when testing the io-lines of the
662 * controller may confuse the keyboard need a full reset of the keyboard. On
663 * these systems the BIOS also usually doesn't do it for us.
664 */
665
666 if (atkbd_reset)
667 if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
668 printk(KERN_WARNING "atkbd.c: keyboard reset failed on %s\n", ps2dev->serio->phys);
669
670 /*
671 * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
672 * Some keyboards report different values, but the first byte is always 0xab or
673 * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
674 * should make sure we don't try to set the LEDs on it.
675 */
676
677 param[0] = param[1] = 0xa5; /* initialize with invalid values */
678 if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
679
680 /*
681 * If the get ID command failed, we check if we can at least set the LEDs on
682 * the keyboard. This should work on every keyboard out there. It also turns
683 * the LEDs off, which we want anyway.
684 */
685 param[0] = 0;
686 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
687 return -1;
688 atkbd->id = 0xabba;
689 return 0;
690 }
691
692 if (!ps2_is_keyboard_id(param[0]))
693 return -1;
694
695 atkbd->id = (param[0] << 8) | param[1];
696
697 if (atkbd->id == 0xaca1 && atkbd->translated) {
698 printk(KERN_ERR "atkbd.c: NCD terminal keyboards are only supported on non-translating\n");
699 printk(KERN_ERR "atkbd.c: controllers. Use i8042.direct=1 to disable translation.\n");
700 return -1;
701 }
702
703 return 0;
704 }
705
706 /*
707 * atkbd_select_set checks if a keyboard has a working Set 3 support, and
708 * sets it into that. Unfortunately there are keyboards that can be switched
709 * to Set 3, but don't work well in that (BTC Multimedia ...)
710 */
711
712 static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
713 {
714 struct ps2dev *ps2dev = &atkbd->ps2dev;
715 unsigned char param[2];
716
717 atkbd->extra = 0;
718 /*
719 * For known special keyboards we can go ahead and set the correct set.
720 * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
721 * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
722 */
723
724 if (atkbd->translated)
725 return 2;
726
727 if (atkbd->id == 0xaca1) {
728 param[0] = 3;
729 ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
730 return 3;
731 }
732
733 if (allow_extra) {
734 param[0] = 0x71;
735 if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
736 atkbd->extra = 1;
737 return 2;
738 }
739 }
740
741 if (target_set != 3)
742 return 2;
743
744 if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
745 atkbd->id = param[0] << 8 | param[1];
746 return 2;
747 }
748
749 param[0] = 3;
750 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
751 return 2;
752
753 param[0] = 0;
754 if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
755 return 2;
756
757 if (param[0] != 3) {
758 param[0] = 2;
759 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
760 return 2;
761 }
762
763 ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
764
765 return 3;
766 }
767
768 static int atkbd_activate(struct atkbd *atkbd)
769 {
770 struct ps2dev *ps2dev = &atkbd->ps2dev;
771 unsigned char param[1];
772
773 /*
774 * Set the LEDs to a defined state.
775 */
776
777 param[0] = 0;
778 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
779 return -1;
780
781 /*
782 * Set autorepeat to fastest possible.
783 */
784
785 param[0] = 0;
786 if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
787 return -1;
788
789 /*
790 * Enable the keyboard to receive keystrokes.
791 */
792
793 if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
794 printk(KERN_ERR "atkbd.c: Failed to enable keyboard on %s\n",
795 ps2dev->serio->phys);
796 return -1;
797 }
798
799 return 0;
800 }
801
802 /*
803 * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
804 * reboot.
805 */
806
807 static void atkbd_cleanup(struct serio *serio)
808 {
809 struct atkbd *atkbd = serio_get_drvdata(serio);
810 ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_BAT);
811 }
812
813
814 /*
815 * atkbd_disconnect() closes and frees.
816 */
817
818 static void atkbd_disconnect(struct serio *serio)
819 {
820 struct atkbd *atkbd = serio_get_drvdata(serio);
821
822 atkbd_disable(atkbd);
823
824 /* make sure we don't have a command in flight */
825 flush_scheduled_work();
826
827 sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
828 input_unregister_device(atkbd->dev);
829 serio_close(serio);
830 serio_set_drvdata(serio, NULL);
831 kfree(atkbd);
832 }
833
834 /*
835 * Most special keys (Fn+F?) on Dell Latitudes do not generate release
836 * events so we have to do it ourselves.
837 */
838 static void atkbd_latitude_keymap_fixup(struct atkbd *atkbd)
839 {
840 const unsigned int forced_release_keys[] = {
841 0x85, 0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8f, 0x93,
842 };
843 int i;
844
845 if (atkbd->set == 2)
846 for (i = 0; i < ARRAY_SIZE(forced_release_keys); i++)
847 __set_bit(forced_release_keys[i],
848 atkbd->force_release_mask);
849 }
850
851 /*
852 * atkbd_set_keycode_table() initializes keyboard's keycode table
853 * according to the selected scancode set
854 */
855
856 static void atkbd_set_keycode_table(struct atkbd *atkbd)
857 {
858 unsigned int scancode;
859 int i, j;
860
861 memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
862 bitmap_zero(atkbd->force_release_mask, 512);
863
864 if (atkbd->translated) {
865 for (i = 0; i < 128; i++) {
866 scancode = atkbd_unxlate_table[i];
867 atkbd->keycode[i] = atkbd_set2_keycode[scancode];
868 atkbd->keycode[i | 0x80] = atkbd_set2_keycode[scancode | 0x80];
869 if (atkbd->scroll)
870 for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
871 if ((scancode | 0x80) == atkbd_scroll_keys[j].set2)
872 atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
873 }
874 } else if (atkbd->set == 3) {
875 memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
876 } else {
877 memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));
878
879 if (atkbd->scroll)
880 for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++) {
881 scancode = atkbd_scroll_keys[i].set2;
882 atkbd->keycode[scancode] = atkbd_scroll_keys[i].keycode;
883 }
884 }
885
886 /*
887 * HANGEUL and HANJA keys do not send release events so we need to
888 * generate such events ourselves
889 */
890 scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL);
891 atkbd->keycode[scancode] = KEY_HANGEUL;
892 __set_bit(scancode, atkbd->force_release_mask);
893
894 scancode = atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA);
895 atkbd->keycode[scancode] = KEY_HANJA;
896 __set_bit(scancode, atkbd->force_release_mask);
897
898 /*
899 * Perform additional fixups
900 */
901 if (atkbd_platform_fixup)
902 atkbd_platform_fixup(atkbd);
903 }
904
905 /*
906 * atkbd_set_device_attrs() sets up keyboard's input device structure
907 */
908
909 static void atkbd_set_device_attrs(struct atkbd *atkbd)
910 {
911 struct input_dev *input_dev = atkbd->dev;
912 int i;
913
914 if (atkbd->extra)
915 snprintf(atkbd->name, sizeof(atkbd->name),
916 "AT Set 2 Extra keyboard");
917 else
918 snprintf(atkbd->name, sizeof(atkbd->name),
919 "AT %s Set %d keyboard",
920 atkbd->translated ? "Translated" : "Raw", atkbd->set);
921
922 snprintf(atkbd->phys, sizeof(atkbd->phys),
923 "%s/input0", atkbd->ps2dev.serio->phys);
924
925 input_dev->name = atkbd->name;
926 input_dev->phys = atkbd->phys;
927 input_dev->id.bustype = BUS_I8042;
928 input_dev->id.vendor = 0x0001;
929 input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
930 input_dev->id.version = atkbd->id;
931 input_dev->event = atkbd_event;
932 input_dev->dev.parent = &atkbd->ps2dev.serio->dev;
933
934 input_set_drvdata(input_dev, atkbd);
935
936 input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REP) |
937 BIT_MASK(EV_MSC);
938
939 if (atkbd->write) {
940 input_dev->evbit[0] |= BIT_MASK(EV_LED);
941 input_dev->ledbit[0] = BIT_MASK(LED_NUML) |
942 BIT_MASK(LED_CAPSL) | BIT_MASK(LED_SCROLLL);
943 }
944
945 if (atkbd->extra)
946 input_dev->ledbit[0] |= BIT_MASK(LED_COMPOSE) |
947 BIT_MASK(LED_SUSPEND) | BIT_MASK(LED_SLEEP) |
948 BIT_MASK(LED_MUTE) | BIT_MASK(LED_MISC);
949
950 if (!atkbd->softrepeat) {
951 input_dev->rep[REP_DELAY] = 250;
952 input_dev->rep[REP_PERIOD] = 33;
953 }
954
955 input_dev->mscbit[0] = atkbd->softraw ? BIT_MASK(MSC_SCAN) :
956 BIT_MASK(MSC_RAW) | BIT_MASK(MSC_SCAN);
957
958 if (atkbd->scroll) {
959 input_dev->evbit[0] |= BIT_MASK(EV_REL);
960 input_dev->relbit[0] = BIT_MASK(REL_WHEEL) |
961 BIT_MASK(REL_HWHEEL);
962 set_bit(BTN_MIDDLE, input_dev->keybit);
963 }
964
965 input_dev->keycode = atkbd->keycode;
966 input_dev->keycodesize = sizeof(unsigned char);
967 input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);
968
969 for (i = 0; i < 512; i++)
970 if (atkbd->keycode[i] && atkbd->keycode[i] < ATKBD_SPECIAL)
971 set_bit(atkbd->keycode[i], input_dev->keybit);
972 }
973
974 /*
975 * atkbd_connect() is called when the serio module finds an interface
976 * that isn't handled yet by an appropriate device driver. We check if
977 * there is an AT keyboard out there and if yes, we register ourselves
978 * to the input module.
979 */
980
981 static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
982 {
983 struct atkbd *atkbd;
984 struct input_dev *dev;
985 int err = -ENOMEM;
986
987 atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
988 dev = input_allocate_device();
989 if (!atkbd || !dev)
990 goto fail1;
991
992 atkbd->dev = dev;
993 ps2_init(&atkbd->ps2dev, serio);
994 INIT_DELAYED_WORK(&atkbd->event_work, atkbd_event_work);
995 mutex_init(&atkbd->event_mutex);
996
997 switch (serio->id.type) {
998
999 case SERIO_8042_XL:
1000 atkbd->translated = 1;
1001 case SERIO_8042:
1002 if (serio->write)
1003 atkbd->write = 1;
1004 break;
1005 }
1006
1007 atkbd->softraw = atkbd_softraw;
1008 atkbd->softrepeat = atkbd_softrepeat;
1009 atkbd->scroll = atkbd_scroll;
1010
1011 if (atkbd->softrepeat)
1012 atkbd->softraw = 1;
1013
1014 serio_set_drvdata(serio, atkbd);
1015
1016 err = serio_open(serio, drv);
1017 if (err)
1018 goto fail2;
1019
1020 if (atkbd->write) {
1021
1022 if (atkbd_probe(atkbd)) {
1023 err = -ENODEV;
1024 goto fail3;
1025 }
1026
1027 atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
1028 atkbd_activate(atkbd);
1029
1030 } else {
1031 atkbd->set = 2;
1032 atkbd->id = 0xab00;
1033 }
1034
1035 atkbd_set_keycode_table(atkbd);
1036 atkbd_set_device_attrs(atkbd);
1037
1038 err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group);
1039 if (err)
1040 goto fail3;
1041
1042 atkbd_enable(atkbd);
1043
1044 err = input_register_device(atkbd->dev);
1045 if (err)
1046 goto fail4;
1047
1048 return 0;
1049
1050 fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
1051 fail3: serio_close(serio);
1052 fail2: serio_set_drvdata(serio, NULL);
1053 fail1: input_free_device(dev);
1054 kfree(atkbd);
1055 return err;
1056 }
1057
1058 /*
1059 * atkbd_reconnect() tries to restore keyboard into a sane state and is
1060 * most likely called on resume.
1061 */
1062
1063 static int atkbd_reconnect(struct serio *serio)
1064 {
1065 struct atkbd *atkbd = serio_get_drvdata(serio);
1066 struct serio_driver *drv = serio->drv;
1067
1068 if (!atkbd || !drv) {
1069 printk(KERN_DEBUG "atkbd: reconnect request, but serio is disconnected, ignoring...\n");
1070 return -1;
1071 }
1072
1073 atkbd_disable(atkbd);
1074
1075 if (atkbd->write) {
1076 if (atkbd_probe(atkbd))
1077 return -1;
1078 if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
1079 return -1;
1080
1081 atkbd_activate(atkbd);
1082
1083 /*
1084 * Restore repeat rate and LEDs (that were reset by atkbd_activate)
1085 * to pre-resume state
1086 */
1087 if (!atkbd->softrepeat)
1088 atkbd_set_repeat_rate(atkbd);
1089 atkbd_set_leds(atkbd);
1090 }
1091
1092 atkbd_enable(atkbd);
1093
1094 return 0;
1095 }
1096
1097 static struct serio_device_id atkbd_serio_ids[] = {
1098 {
1099 .type = SERIO_8042,
1100 .proto = SERIO_ANY,
1101 .id = SERIO_ANY,
1102 .extra = SERIO_ANY,
1103 },
1104 {
1105 .type = SERIO_8042_XL,
1106 .proto = SERIO_ANY,
1107 .id = SERIO_ANY,
1108 .extra = SERIO_ANY,
1109 },
1110 {
1111 .type = SERIO_RS232,
1112 .proto = SERIO_PS2SER,
1113 .id = SERIO_ANY,
1114 .extra = SERIO_ANY,
1115 },
1116 { 0 }
1117 };
1118
1119 MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);
1120
1121 static struct serio_driver atkbd_drv = {
1122 .driver = {
1123 .name = "atkbd",
1124 },
1125 .description = DRIVER_DESC,
1126 .id_table = atkbd_serio_ids,
1127 .interrupt = atkbd_interrupt,
1128 .connect = atkbd_connect,
1129 .reconnect = atkbd_reconnect,
1130 .disconnect = atkbd_disconnect,
1131 .cleanup = atkbd_cleanup,
1132 };
1133
1134 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
1135 ssize_t (*handler)(struct atkbd *, char *))
1136 {
1137 struct serio *serio = to_serio_port(dev);
1138 int retval;
1139
1140 retval = serio_pin_driver(serio);
1141 if (retval)
1142 return retval;
1143
1144 if (serio->drv != &atkbd_drv) {
1145 retval = -ENODEV;
1146 goto out;
1147 }
1148
1149 retval = handler((struct atkbd *)serio_get_drvdata(serio), buf);
1150
1151 out:
1152 serio_unpin_driver(serio);
1153 return retval;
1154 }
1155
1156 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
1157 ssize_t (*handler)(struct atkbd *, const char *, size_t))
1158 {
1159 struct serio *serio = to_serio_port(dev);
1160 struct atkbd *atkbd;
1161 int retval;
1162
1163 retval = serio_pin_driver(serio);
1164 if (retval)
1165 return retval;
1166
1167 if (serio->drv != &atkbd_drv) {
1168 retval = -ENODEV;
1169 goto out;
1170 }
1171
1172 atkbd = serio_get_drvdata(serio);
1173 atkbd_disable(atkbd);
1174 retval = handler(atkbd, buf, count);
1175 atkbd_enable(atkbd);
1176
1177 out:
1178 serio_unpin_driver(serio);
1179 return retval;
1180 }
1181
1182 static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
1183 {
1184 return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
1185 }
1186
1187 static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
1188 {
1189 struct input_dev *old_dev, *new_dev;
1190 unsigned long value;
1191 char *rest;
1192 int err;
1193 unsigned char old_extra, old_set;
1194
1195 if (!atkbd->write)
1196 return -EIO;
1197
1198 value = simple_strtoul(buf, &rest, 10);
1199 if (*rest || value > 1)
1200 return -EINVAL;
1201
1202 if (atkbd->extra != value) {
1203 /*
1204 * Since device's properties will change we need to
1205 * unregister old device. But allocate and register
1206 * new one first to make sure we have it.
1207 */
1208 old_dev = atkbd->dev;
1209 old_extra = atkbd->extra;
1210 old_set = atkbd->set;
1211
1212 new_dev = input_allocate_device();
1213 if (!new_dev)
1214 return -ENOMEM;
1215
1216 atkbd->dev = new_dev;
1217 atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
1218 atkbd_activate(atkbd);
1219 atkbd_set_keycode_table(atkbd);
1220 atkbd_set_device_attrs(atkbd);
1221
1222 err = input_register_device(atkbd->dev);
1223 if (err) {
1224 input_free_device(new_dev);
1225
1226 atkbd->dev = old_dev;
1227 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1228 atkbd_set_keycode_table(atkbd);
1229 atkbd_set_device_attrs(atkbd);
1230
1231 return err;
1232 }
1233 input_unregister_device(old_dev);
1234
1235 }
1236 return count;
1237 }
1238
1239 static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
1240 {
1241 return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
1242 }
1243
1244 static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
1245 {
1246 struct input_dev *old_dev, *new_dev;
1247 unsigned long value;
1248 char *rest;
1249 int err;
1250 unsigned char old_scroll;
1251
1252 value = simple_strtoul(buf, &rest, 10);
1253 if (*rest || value > 1)
1254 return -EINVAL;
1255
1256 if (atkbd->scroll != value) {
1257 old_dev = atkbd->dev;
1258 old_scroll = atkbd->scroll;
1259
1260 new_dev = input_allocate_device();
1261 if (!new_dev)
1262 return -ENOMEM;
1263
1264 atkbd->dev = new_dev;
1265 atkbd->scroll = value;
1266 atkbd_set_keycode_table(atkbd);
1267 atkbd_set_device_attrs(atkbd);
1268
1269 err = input_register_device(atkbd->dev);
1270 if (err) {
1271 input_free_device(new_dev);
1272
1273 atkbd->scroll = old_scroll;
1274 atkbd->dev = old_dev;
1275 atkbd_set_keycode_table(atkbd);
1276 atkbd_set_device_attrs(atkbd);
1277
1278 return err;
1279 }
1280 input_unregister_device(old_dev);
1281 }
1282 return count;
1283 }
1284
1285 static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
1286 {
1287 return sprintf(buf, "%d\n", atkbd->set);
1288 }
1289
1290 static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
1291 {
1292 struct input_dev *old_dev, *new_dev;
1293 unsigned long value;
1294 char *rest;
1295 int err;
1296 unsigned char old_set, old_extra;
1297
1298 if (!atkbd->write)
1299 return -EIO;
1300
1301 value = simple_strtoul(buf, &rest, 10);
1302 if (*rest || (value != 2 && value != 3))
1303 return -EINVAL;
1304
1305 if (atkbd->set != value) {
1306 old_dev = atkbd->dev;
1307 old_extra = atkbd->extra;
1308 old_set = atkbd->set;
1309
1310 new_dev = input_allocate_device();
1311 if (!new_dev)
1312 return -ENOMEM;
1313
1314 atkbd->dev = new_dev;
1315 atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
1316 atkbd_activate(atkbd);
1317 atkbd_set_keycode_table(atkbd);
1318 atkbd_set_device_attrs(atkbd);
1319
1320 err = input_register_device(atkbd->dev);
1321 if (err) {
1322 input_free_device(new_dev);
1323
1324 atkbd->dev = old_dev;
1325 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1326 atkbd_set_keycode_table(atkbd);
1327 atkbd_set_device_attrs(atkbd);
1328
1329 return err;
1330 }
1331 input_unregister_device(old_dev);
1332 }
1333 return count;
1334 }
1335
1336 static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf)
1337 {
1338 return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
1339 }
1340
1341 static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count)
1342 {
1343 struct input_dev *old_dev, *new_dev;
1344 unsigned long value;
1345 char *rest;
1346 int err;
1347 unsigned char old_softrepeat, old_softraw;
1348
1349 if (!atkbd->write)
1350 return -EIO;
1351
1352 value = simple_strtoul(buf, &rest, 10);
1353 if (*rest || value > 1)
1354 return -EINVAL;
1355
1356 if (atkbd->softrepeat != value) {
1357 old_dev = atkbd->dev;
1358 old_softrepeat = atkbd->softrepeat;
1359 old_softraw = atkbd->softraw;
1360
1361 new_dev = input_allocate_device();
1362 if (!new_dev)
1363 return -ENOMEM;
1364
1365 atkbd->dev = new_dev;
1366 atkbd->softrepeat = value;
1367 if (atkbd->softrepeat)
1368 atkbd->softraw = 1;
1369 atkbd_set_device_attrs(atkbd);
1370
1371 err = input_register_device(atkbd->dev);
1372 if (err) {
1373 input_free_device(new_dev);
1374
1375 atkbd->dev = old_dev;
1376 atkbd->softrepeat = old_softrepeat;
1377 atkbd->softraw = old_softraw;
1378 atkbd_set_device_attrs(atkbd);
1379
1380 return err;
1381 }
1382 input_unregister_device(old_dev);
1383 }
1384 return count;
1385 }
1386
1387
1388 static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
1389 {
1390 return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
1391 }
1392
1393 static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
1394 {
1395 struct input_dev *old_dev, *new_dev;
1396 unsigned long value;
1397 char *rest;
1398 int err;
1399 unsigned char old_softraw;
1400
1401 value = simple_strtoul(buf, &rest, 10);
1402 if (*rest || value > 1)
1403 return -EINVAL;
1404
1405 if (atkbd->softraw != value) {
1406 old_dev = atkbd->dev;
1407 old_softraw = atkbd->softraw;
1408
1409 new_dev = input_allocate_device();
1410 if (!new_dev)
1411 return -ENOMEM;
1412
1413 atkbd->dev = new_dev;
1414 atkbd->softraw = value;
1415 atkbd_set_device_attrs(atkbd);
1416
1417 err = input_register_device(atkbd->dev);
1418 if (err) {
1419 input_free_device(new_dev);
1420
1421 atkbd->dev = old_dev;
1422 atkbd->softraw = old_softraw;
1423 atkbd_set_device_attrs(atkbd);
1424
1425 return err;
1426 }
1427 input_unregister_device(old_dev);
1428 }
1429 return count;
1430 }
1431
1432 static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
1433 {
1434 return sprintf(buf, "%lu\n", atkbd->err_count);
1435 }
1436
1437 static int __init atkbd_setup_fixup(const struct dmi_system_id *id)
1438 {
1439 atkbd_platform_fixup = id->driver_data;
1440 return 0;
1441 }
1442
1443 static struct dmi_system_id atkbd_dmi_quirk_table[] __initdata = {
1444 {
1445 .ident = "Dell Latitude series",
1446 .matches = {
1447 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
1448 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude"),
1449 },
1450 .callback = atkbd_setup_fixup,
1451 .driver_data = atkbd_latitude_keymap_fixup,
1452 },
1453 { }
1454 };
1455
1456 static int __init atkbd_init(void)
1457 {
1458 dmi_check_system(atkbd_dmi_quirk_table);
1459
1460 return serio_register_driver(&atkbd_drv);
1461 }
1462
1463 static void __exit atkbd_exit(void)
1464 {
1465 serio_unregister_driver(&atkbd_drv);
1466 }
1467
1468 module_init(atkbd_init);
1469 module_exit(atkbd_exit);
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