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fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / drivers / input / keyboard / atkbd.c
blob41fc3d03b6eb495759cb93fbb7611e2acf76b712
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/moduleparam.h>
23 #include <linux/slab.h>
24 #include <linux/interrupt.h>
25 #include <linux/init.h>
26 #include <linux/input.h>
27 #include <linux/serio.h>
28 #include <linux/workqueue.h>
29 #include <linux/libps2.h>
30 #include <linux/mutex.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 unsigned char set;
205 unsigned char translated;
206 unsigned char extra;
207 unsigned char write;
208 unsigned char softrepeat;
209 unsigned char softraw;
210 unsigned char scroll;
211 unsigned char enabled;
212
213 /* Accessed only from interrupt */
214 unsigned char emul;
215 unsigned char resend;
216 unsigned char release;
217 unsigned long xl_bit;
218 unsigned int last;
219 unsigned long time;
220 unsigned long err_count;
221
222 struct delayed_work event_work;
223 unsigned long event_jiffies;
224 struct mutex event_mutex;
225 unsigned long event_mask;
226 };
227
228 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
229 ssize_t (*handler)(struct atkbd *, char *));
230 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
231 ssize_t (*handler)(struct atkbd *, const char *, size_t));
232 #define ATKBD_DEFINE_ATTR(_name) \
233 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
234 static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t); \
235 static ssize_t atkbd_do_show_##_name(struct device *d, \
236 struct device_attribute *attr, char *b) \
237 { \
238 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
239 } \
240 static ssize_t atkbd_do_set_##_name(struct device *d, \
241 struct device_attribute *attr, const char *b, size_t s) \
242 { \
243 return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name); \
244 } \
245 static struct device_attribute atkbd_attr_##_name = \
246 __ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
247
248 ATKBD_DEFINE_ATTR(extra);
249 ATKBD_DEFINE_ATTR(scroll);
250 ATKBD_DEFINE_ATTR(set);
251 ATKBD_DEFINE_ATTR(softrepeat);
252 ATKBD_DEFINE_ATTR(softraw);
253
254 #define ATKBD_DEFINE_RO_ATTR(_name) \
255 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
256 static ssize_t atkbd_do_show_##_name(struct device *d, \
257 struct device_attribute *attr, char *b) \
258 { \
259 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
260 } \
261 static struct device_attribute atkbd_attr_##_name = \
262 __ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
263
264 ATKBD_DEFINE_RO_ATTR(err_count);
265
266 static struct attribute *atkbd_attributes[] = {
267 &atkbd_attr_extra.attr,
268 &atkbd_attr_scroll.attr,
269 &atkbd_attr_set.attr,
270 &atkbd_attr_softrepeat.attr,
271 &atkbd_attr_softraw.attr,
272 &atkbd_attr_err_count.attr,
273 NULL
274 };
275
276 static struct attribute_group atkbd_attribute_group = {
277 .attrs = atkbd_attributes,
278 };
279
280 static const unsigned int xl_table[] = {
281 ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
282 ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
283 };
284
285 /*
286 * Checks if we should mangle the scancode to extract 'release' bit
287 * in translated mode.
288 */
289 static int atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
290 {
291 int i;
292
293 if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
294 return 0;
295
296 for (i = 0; i < ARRAY_SIZE(xl_table); i++)
297 if (code == xl_table[i])
298 return test_bit(i, &xl_bit);
299
300 return 1;
301 }
302
303 /*
304 * Calculates new value of xl_bit so the driver can distinguish
305 * between make/break pair of scancodes for select keys and PS/2
306 * protocol responses.
307 */
308 static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
309 {
310 int i;
311
312 for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
313 if (!((code ^ xl_table[i]) & 0x7f)) {
314 if (code & 0x80)
315 __clear_bit(i, &atkbd->xl_bit);
316 else
317 __set_bit(i, &atkbd->xl_bit);
318 break;
319 }
320 }
321 }
322
323 /*
324 * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
325 * keeping kernel 2.4 compatibility for set 2
326 */
327 static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
328 {
329 if (atkbd->set == 3) {
330 if (atkbd->emul == 1)
331 code |= 0x100;
332 } else {
333 code = (code & 0x7f) | ((code & 0x80) << 1);
334 if (atkbd->emul == 1)
335 code |= 0x80;
336 }
337
338 return code;
339 }
340
341 /*
342 * atkbd_interrupt(). Here takes place processing of data received from
343 * the keyboard into events.
344 */
345
346 static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
347 unsigned int flags)
348 {
349 struct atkbd *atkbd = serio_get_drvdata(serio);
350 struct input_dev *dev = atkbd->dev;
351 unsigned int code = data;
352 int scroll = 0, hscroll = 0, click = -1, add_release_event = 0;
353 int value;
354 unsigned char keycode;
355
356 #ifdef ATKBD_DEBUG
357 printk(KERN_DEBUG "atkbd.c: Received %02x flags %02x\n", data, flags);
358 #endif
359
360 #if !defined(__i386__) && !defined (__x86_64__)
361 if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
362 printk(KERN_WARNING "atkbd.c: frame/parity error: %02x\n", flags);
363 serio_write(serio, ATKBD_CMD_RESEND);
364 atkbd->resend = 1;
365 goto out;
366 }
367
368 if (!flags && data == ATKBD_RET_ACK)
369 atkbd->resend = 0;
370 #endif
371
372 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
373 if (ps2_handle_ack(&atkbd->ps2dev, data))
374 goto out;
375
376 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
377 if (ps2_handle_response(&atkbd->ps2dev, data))
378 goto out;
379
380 if (!atkbd->enabled)
381 goto out;
382
383 input_event(dev, EV_MSC, MSC_RAW, code);
384
385 if (atkbd->translated) {
386
387 if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
388 atkbd->release = code >> 7;
389 code &= 0x7f;
390 }
391
392 if (!atkbd->emul)
393 atkbd_calculate_xl_bit(atkbd, data);
394 }
395
396 switch (code) {
397 case ATKBD_RET_BAT:
398 atkbd->enabled = 0;
399 serio_reconnect(atkbd->ps2dev.serio);
400 goto out;
401 case ATKBD_RET_EMUL0:
402 atkbd->emul = 1;
403 goto out;
404 case ATKBD_RET_EMUL1:
405 atkbd->emul = 2;
406 goto out;
407 case ATKBD_RET_RELEASE:
408 atkbd->release = 1;
409 goto out;
410 case ATKBD_RET_ACK:
411 case ATKBD_RET_NAK:
412 if (printk_ratelimit())
413 printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
414 "Some program might be trying access hardware directly.\n",
415 data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
416 goto out;
417 case ATKBD_RET_HANGEUL:
418 case ATKBD_RET_HANJA:
419 /*
420 * These keys do not report release and thus need to be
421 * flagged properly
422 */
423 add_release_event = 1;
424 break;
425 case ATKBD_RET_ERR:
426 atkbd->err_count++;
427 #ifdef ATKBD_DEBUG
428 printk(KERN_DEBUG "atkbd.c: Keyboard on %s reports too many keys pressed.\n", serio->phys);
429 #endif
430 goto out;
431 }
432
433 code = atkbd_compat_scancode(atkbd, code);
434
435 if (atkbd->emul && --atkbd->emul)
436 goto out;
437
438 keycode = atkbd->keycode[code];
439
440 if (keycode != ATKBD_KEY_NULL)
441 input_event(dev, EV_MSC, MSC_SCAN, code);
442
443 switch (keycode) {
444 case ATKBD_KEY_NULL:
445 break;
446 case ATKBD_KEY_UNKNOWN:
447 printk(KERN_WARNING
448 "atkbd.c: Unknown key %s (%s set %d, code %#x on %s).\n",
449 atkbd->release ? "released" : "pressed",
450 atkbd->translated ? "translated" : "raw",
451 atkbd->set, code, serio->phys);
452 printk(KERN_WARNING
453 "atkbd.c: Use 'setkeycodes %s%02x <keycode>' to make it known.\n",
454 code & 0x80 ? "e0" : "", code & 0x7f);
455 input_sync(dev);
456 break;
457 case ATKBD_SCR_1:
458 scroll = 1 - atkbd->release * 2;
459 break;
460 case ATKBD_SCR_2:
461 scroll = 2 - atkbd->release * 4;
462 break;
463 case ATKBD_SCR_4:
464 scroll = 4 - atkbd->release * 8;
465 break;
466 case ATKBD_SCR_8:
467 scroll = 8 - atkbd->release * 16;
468 break;
469 case ATKBD_SCR_CLICK:
470 click = !atkbd->release;
471 break;
472 case ATKBD_SCR_LEFT:
473 hscroll = -1;
474 break;
475 case ATKBD_SCR_RIGHT:
476 hscroll = 1;
477 break;
478 default:
479 if (atkbd->release) {
480 value = 0;
481 atkbd->last = 0;
482 } else if (!atkbd->softrepeat && test_bit(keycode, dev->key)) {
483 /* Workaround Toshiba laptop multiple keypress */
484 value = time_before(jiffies, atkbd->time) && atkbd->last == code ? 1 : 2;
485 } else {
486 value = 1;
487 atkbd->last = code;
488 atkbd->time = jiffies + msecs_to_jiffies(dev->rep[REP_DELAY]) / 2;
489 }
490
491 input_event(dev, EV_KEY, keycode, value);
492 input_sync(dev);
493
494 if (value && add_release_event) {
495 input_report_key(dev, keycode, 0);
496 input_sync(dev);
497 }
498 }
499
500 if (atkbd->scroll) {
501 if (click != -1)
502 input_report_key(dev, BTN_MIDDLE, click);
503 input_report_rel(dev, REL_WHEEL, scroll);
504 input_report_rel(dev, REL_HWHEEL, hscroll);
505 input_sync(dev);
506 }
507
508 atkbd->release = 0;
509 out:
510 return IRQ_HANDLED;
511 }
512
513 static int atkbd_set_repeat_rate(struct atkbd *atkbd)
514 {
515 const short period[32] =
516 { 33, 37, 42, 46, 50, 54, 58, 63, 67, 75, 83, 92, 100, 109, 116, 125,
517 133, 149, 167, 182, 200, 217, 232, 250, 270, 303, 333, 370, 400, 435, 470, 500 };
518 const short delay[4] =
519 { 250, 500, 750, 1000 };
520
521 struct input_dev *dev = atkbd->dev;
522 unsigned char param;
523 int i = 0, j = 0;
524
525 while (i < ARRAY_SIZE(period) - 1 && period[i] < dev->rep[REP_PERIOD])
526 i++;
527 dev->rep[REP_PERIOD] = period[i];
528
529 while (j < ARRAY_SIZE(delay) - 1 && delay[j] < dev->rep[REP_DELAY])
530 j++;
531 dev->rep[REP_DELAY] = delay[j];
532
533 param = i | (j << 5);
534 return ps2_command(&atkbd->ps2dev, &param, ATKBD_CMD_SETREP);
535 }
536
537 static int atkbd_set_leds(struct atkbd *atkbd)
538 {
539 struct input_dev *dev = atkbd->dev;
540 unsigned char param[2];
541
542 param[0] = (test_bit(LED_SCROLLL, dev->led) ? 1 : 0)
543 | (test_bit(LED_NUML, dev->led) ? 2 : 0)
544 | (test_bit(LED_CAPSL, dev->led) ? 4 : 0);
545 if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_SETLEDS))
546 return -1;
547
548 if (atkbd->extra) {
549 param[0] = 0;
550 param[1] = (test_bit(LED_COMPOSE, dev->led) ? 0x01 : 0)
551 | (test_bit(LED_SLEEP, dev->led) ? 0x02 : 0)
552 | (test_bit(LED_SUSPEND, dev->led) ? 0x04 : 0)
553 | (test_bit(LED_MISC, dev->led) ? 0x10 : 0)
554 | (test_bit(LED_MUTE, dev->led) ? 0x20 : 0);
555 if (ps2_command(&atkbd->ps2dev, param, ATKBD_CMD_EX_SETLEDS))
556 return -1;
557 }
558
559 return 0;
560 }
561
562 /*
563 * atkbd_event_work() is used to complete processing of events that
564 * can not be processed by input_event() which is often called from
565 * interrupt context.
566 */
567
568 static void atkbd_event_work(struct work_struct *work)
569 {
570 struct atkbd *atkbd = container_of(work, struct atkbd, event_work.work);
571
572 mutex_lock(&atkbd->event_mutex);
573
574 if (test_and_clear_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask))
575 atkbd_set_leds(atkbd);
576
577 if (test_and_clear_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask))
578 atkbd_set_repeat_rate(atkbd);
579
580 mutex_unlock(&atkbd->event_mutex);
581 }
582
583 /*
584 * Schedule switch for execution. We need to throttle requests,
585 * otherwise keyboard may become unresponsive.
586 */
587 static void atkbd_schedule_event_work(struct atkbd *atkbd, int event_bit)
588 {
589 unsigned long delay = msecs_to_jiffies(50);
590
591 if (time_after(jiffies, atkbd->event_jiffies + delay))
592 delay = 0;
593
594 atkbd->event_jiffies = jiffies;
595 set_bit(event_bit, &atkbd->event_mask);
596 wmb();
597 schedule_delayed_work(&atkbd->event_work, delay);
598 }
599
600 /*
601 * Event callback from the input module. Events that change the state of
602 * the hardware are processed here. If action can not be performed in
603 * interrupt context it is offloaded to atkbd_event_work.
604 */
605
606 static int atkbd_event(struct input_dev *dev,
607 unsigned int type, unsigned int code, int value)
608 {
609 struct atkbd *atkbd = input_get_drvdata(dev);
610
611 if (!atkbd->write)
612 return -1;
613
614 switch (type) {
615
616 case EV_LED:
617 atkbd_schedule_event_work(atkbd, ATKBD_LED_EVENT_BIT);
618 return 0;
619
620 case EV_REP:
621 if (!atkbd->softrepeat)
622 atkbd_schedule_event_work(atkbd, ATKBD_REP_EVENT_BIT);
623 return 0;
624 }
625
626 return -1;
627 }
628
629 /*
630 * atkbd_enable() signals that interrupt handler is allowed to
631 * generate input events.
632 */
633
634 static inline void atkbd_enable(struct atkbd *atkbd)
635 {
636 serio_pause_rx(atkbd->ps2dev.serio);
637 atkbd->enabled = 1;
638 serio_continue_rx(atkbd->ps2dev.serio);
639 }
640
641 /*
642 * atkbd_disable() tells input handler that all incoming data except
643 * for ACKs and command response should be dropped.
644 */
645
646 static inline void atkbd_disable(struct atkbd *atkbd)
647 {
648 serio_pause_rx(atkbd->ps2dev.serio);
649 atkbd->enabled = 0;
650 serio_continue_rx(atkbd->ps2dev.serio);
651 }
652
653 /*
654 * atkbd_probe() probes for an AT keyboard on a serio port.
655 */
656
657 static int atkbd_probe(struct atkbd *atkbd)
658 {
659 struct ps2dev *ps2dev = &atkbd->ps2dev;
660 unsigned char param[2];
661
662 /*
663 * Some systems, where the bit-twiddling when testing the io-lines of the
664 * controller may confuse the keyboard need a full reset of the keyboard. On
665 * these systems the BIOS also usually doesn't do it for us.
666 */
667
668 if (atkbd_reset)
669 if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
670 printk(KERN_WARNING "atkbd.c: keyboard reset failed on %s\n", ps2dev->serio->phys);
671
672 /*
673 * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
674 * Some keyboards report different values, but the first byte is always 0xab or
675 * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
676 * should make sure we don't try to set the LEDs on it.
677 */
678
679 param[0] = param[1] = 0xa5; /* initialize with invalid values */
680 if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
681
682 /*
683 * If the get ID command failed, we check if we can at least set the LEDs on
684 * the keyboard. This should work on every keyboard out there. It also turns
685 * the LEDs off, which we want anyway.
686 */
687 param[0] = 0;
688 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
689 return -1;
690 atkbd->id = 0xabba;
691 return 0;
692 }
693
694 if (!ps2_is_keyboard_id(param[0]))
695 return -1;
696
697 atkbd->id = (param[0] << 8) | param[1];
698
699 if (atkbd->id == 0xaca1 && atkbd->translated) {
700 printk(KERN_ERR "atkbd.c: NCD terminal keyboards are only supported on non-translating\n");
701 printk(KERN_ERR "atkbd.c: controllers. Use i8042.direct=1 to disable translation.\n");
702 return -1;
703 }
704
705 return 0;
706 }
707
708 /*
709 * atkbd_select_set checks if a keyboard has a working Set 3 support, and
710 * sets it into that. Unfortunately there are keyboards that can be switched
711 * to Set 3, but don't work well in that (BTC Multimedia ...)
712 */
713
714 static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
715 {
716 struct ps2dev *ps2dev = &atkbd->ps2dev;
717 unsigned char param[2];
718
719 atkbd->extra = 0;
720 /*
721 * For known special keyboards we can go ahead and set the correct set.
722 * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
723 * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
724 */
725
726 if (atkbd->translated)
727 return 2;
728
729 if (atkbd->id == 0xaca1) {
730 param[0] = 3;
731 ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
732 return 3;
733 }
734
735 if (allow_extra) {
736 param[0] = 0x71;
737 if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
738 atkbd->extra = 1;
739 return 2;
740 }
741 }
742
743 if (target_set != 3)
744 return 2;
745
746 if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
747 atkbd->id = param[0] << 8 | param[1];
748 return 2;
749 }
750
751 param[0] = 3;
752 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
753 return 2;
754
755 param[0] = 0;
756 if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
757 return 2;
758
759 if (param[0] != 3) {
760 param[0] = 2;
761 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
762 return 2;
763 }
764
765 ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
766
767 return 3;
768 }
769
770 static int atkbd_activate(struct atkbd *atkbd)
771 {
772 struct ps2dev *ps2dev = &atkbd->ps2dev;
773 unsigned char param[1];
774
775 /*
776 * Set the LEDs to a defined state.
777 */
778
779 param[0] = 0;
780 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
781 return -1;
782
783 /*
784 * Set autorepeat to fastest possible.
785 */
786
787 param[0] = 0;
788 if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
789 return -1;
790
791 /*
792 * Enable the keyboard to receive keystrokes.
793 */
794
795 if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
796 printk(KERN_ERR "atkbd.c: Failed to enable keyboard on %s\n",
797 ps2dev->serio->phys);
798 return -1;
799 }
800
801 return 0;
802 }
803
804 /*
805 * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
806 * reboot.
807 */
808
809 static void atkbd_cleanup(struct serio *serio)
810 {
811 struct atkbd *atkbd = serio_get_drvdata(serio);
812 ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_BAT);
813 }
814
815
816 /*
817 * atkbd_disconnect() closes and frees.
818 */
819
820 static void atkbd_disconnect(struct serio *serio)
821 {
822 struct atkbd *atkbd = serio_get_drvdata(serio);
823
824 atkbd_disable(atkbd);
825
826 /* make sure we don't have a command in flight */
827 synchronize_sched(); /* Allow atkbd_interrupt()s to complete. */
828 flush_scheduled_work();
829
830 sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
831 input_unregister_device(atkbd->dev);
832 serio_close(serio);
833 serio_set_drvdata(serio, NULL);
834 kfree(atkbd);
835 }
836
837
838 /*
839 * atkbd_set_keycode_table() initializes keyboard's keycode table
840 * according to the selected scancode set
841 */
842
843 static void atkbd_set_keycode_table(struct atkbd *atkbd)
844 {
845 int i, j;
846
847 memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
848
849 if (atkbd->translated) {
850 for (i = 0; i < 128; i++) {
851 atkbd->keycode[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
852 atkbd->keycode[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
853 if (atkbd->scroll)
854 for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
855 if ((atkbd_unxlate_table[i] | 0x80) == atkbd_scroll_keys[j].set2)
856 atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
857 }
858 } else if (atkbd->set == 3) {
859 memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
860 } else {
861 memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));
862
863 if (atkbd->scroll)
864 for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++)
865 atkbd->keycode[atkbd_scroll_keys[i].set2] = atkbd_scroll_keys[i].keycode;
866 }
867
868 atkbd->keycode[atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL)] = KEY_HANGUEL;
869 atkbd->keycode[atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA)] = KEY_HANJA;
870 }
871
872 /*
873 * atkbd_set_device_attrs() sets up keyboard's input device structure
874 */
875
876 static void atkbd_set_device_attrs(struct atkbd *atkbd)
877 {
878 struct input_dev *input_dev = atkbd->dev;
879 int i;
880
881 if (atkbd->extra)
882 snprintf(atkbd->name, sizeof(atkbd->name),
883 "AT Set 2 Extra keyboard");
884 else
885 snprintf(atkbd->name, sizeof(atkbd->name),
886 "AT %s Set %d keyboard",
887 atkbd->translated ? "Translated" : "Raw", atkbd->set);
888
889 snprintf(atkbd->phys, sizeof(atkbd->phys),
890 "%s/input0", atkbd->ps2dev.serio->phys);
891
892 input_dev->name = atkbd->name;
893 input_dev->phys = atkbd->phys;
894 input_dev->id.bustype = BUS_I8042;
895 input_dev->id.vendor = 0x0001;
896 input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
897 input_dev->id.version = atkbd->id;
898 input_dev->event = atkbd_event;
899 input_dev->dev.parent = &atkbd->ps2dev.serio->dev;
900
901 input_set_drvdata(input_dev, atkbd);
902
903 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_MSC);
904
905 if (atkbd->write) {
906 input_dev->evbit[0] |= BIT(EV_LED);
907 input_dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
908 }
909
910 if (atkbd->extra)
911 input_dev->ledbit[0] |= BIT(LED_COMPOSE) | BIT(LED_SUSPEND) |
912 BIT(LED_SLEEP) | BIT(LED_MUTE) | BIT(LED_MISC);
913
914 if (!atkbd->softrepeat) {
915 input_dev->rep[REP_DELAY] = 250;
916 input_dev->rep[REP_PERIOD] = 33;
917 }
918
919 input_dev->mscbit[0] = atkbd->softraw ? BIT(MSC_SCAN) : BIT(MSC_RAW) | BIT(MSC_SCAN);
920
921 if (atkbd->scroll) {
922 input_dev->evbit[0] |= BIT(EV_REL);
923 input_dev->relbit[0] = BIT(REL_WHEEL) | BIT(REL_HWHEEL);
924 set_bit(BTN_MIDDLE, input_dev->keybit);
925 }
926
927 input_dev->keycode = atkbd->keycode;
928 input_dev->keycodesize = sizeof(unsigned char);
929 input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);
930
931 for (i = 0; i < 512; i++)
932 if (atkbd->keycode[i] && atkbd->keycode[i] < ATKBD_SPECIAL)
933 set_bit(atkbd->keycode[i], input_dev->keybit);
934 }
935
936 /*
937 * atkbd_connect() is called when the serio module finds an interface
938 * that isn't handled yet by an appropriate device driver. We check if
939 * there is an AT keyboard out there and if yes, we register ourselves
940 * to the input module.
941 */
942
943 static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
944 {
945 struct atkbd *atkbd;
946 struct input_dev *dev;
947 int err = -ENOMEM;
948
949 atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
950 dev = input_allocate_device();
951 if (!atkbd || !dev)
952 goto fail1;
953
954 atkbd->dev = dev;
955 ps2_init(&atkbd->ps2dev, serio);
956 INIT_DELAYED_WORK(&atkbd->event_work, atkbd_event_work);
957 mutex_init(&atkbd->event_mutex);
958
959 switch (serio->id.type) {
960
961 case SERIO_8042_XL:
962 atkbd->translated = 1;
963 case SERIO_8042:
964 if (serio->write)
965 atkbd->write = 1;
966 break;
967 }
968
969 atkbd->softraw = atkbd_softraw;
970 atkbd->softrepeat = atkbd_softrepeat;
971 atkbd->scroll = atkbd_scroll;
972
973 if (atkbd->softrepeat)
974 atkbd->softraw = 1;
975
976 serio_set_drvdata(serio, atkbd);
977
978 err = serio_open(serio, drv);
979 if (err)
980 goto fail2;
981
982 if (atkbd->write) {
983
984 if (atkbd_probe(atkbd)) {
985 err = -ENODEV;
986 goto fail3;
987 }
988
989 atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
990 atkbd_activate(atkbd);
991
992 } else {
993 atkbd->set = 2;
994 atkbd->id = 0xab00;
995 }
996
997 atkbd_set_keycode_table(atkbd);
998 atkbd_set_device_attrs(atkbd);
999
1000 err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group);
1001 if (err)
1002 goto fail3;
1003
1004 atkbd_enable(atkbd);
1005
1006 err = input_register_device(atkbd->dev);
1007 if (err)
1008 goto fail4;
1009
1010 return 0;
1011
1012 fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
1013 fail3: serio_close(serio);
1014 fail2: serio_set_drvdata(serio, NULL);
1015 fail1: input_free_device(dev);
1016 kfree(atkbd);
1017 return err;
1018 }
1019
1020 /*
1021 * atkbd_reconnect() tries to restore keyboard into a sane state and is
1022 * most likely called on resume.
1023 */
1024
1025 static int atkbd_reconnect(struct serio *serio)
1026 {
1027 struct atkbd *atkbd = serio_get_drvdata(serio);
1028 struct serio_driver *drv = serio->drv;
1029
1030 if (!atkbd || !drv) {
1031 printk(KERN_DEBUG "atkbd: reconnect request, but serio is disconnected, ignoring...\n");
1032 return -1;
1033 }
1034
1035 atkbd_disable(atkbd);
1036
1037 if (atkbd->write) {
1038 if (atkbd_probe(atkbd))
1039 return -1;
1040 if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
1041 return -1;
1042
1043 atkbd_activate(atkbd);
1044
1045 /*
1046 * Restore repeat rate and LEDs (that were reset by atkbd_activate)
1047 * to pre-resume state
1048 */
1049 if (!atkbd->softrepeat)
1050 atkbd_set_repeat_rate(atkbd);
1051 atkbd_set_leds(atkbd);
1052 }
1053
1054 atkbd_enable(atkbd);
1055
1056 return 0;
1057 }
1058
1059 static struct serio_device_id atkbd_serio_ids[] = {
1060 {
1061 .type = SERIO_8042,
1062 .proto = SERIO_ANY,
1063 .id = SERIO_ANY,
1064 .extra = SERIO_ANY,
1065 },
1066 {
1067 .type = SERIO_8042_XL,
1068 .proto = SERIO_ANY,
1069 .id = SERIO_ANY,
1070 .extra = SERIO_ANY,
1071 },
1072 {
1073 .type = SERIO_RS232,
1074 .proto = SERIO_PS2SER,
1075 .id = SERIO_ANY,
1076 .extra = SERIO_ANY,
1077 },
1078 { 0 }
1079 };
1080
1081 MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);
1082
1083 static struct serio_driver atkbd_drv = {
1084 .driver = {
1085 .name = "atkbd",
1086 },
1087 .description = DRIVER_DESC,
1088 .id_table = atkbd_serio_ids,
1089 .interrupt = atkbd_interrupt,
1090 .connect = atkbd_connect,
1091 .reconnect = atkbd_reconnect,
1092 .disconnect = atkbd_disconnect,
1093 .cleanup = atkbd_cleanup,
1094 };
1095
1096 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
1097 ssize_t (*handler)(struct atkbd *, char *))
1098 {
1099 struct serio *serio = to_serio_port(dev);
1100 int retval;
1101
1102 retval = serio_pin_driver(serio);
1103 if (retval)
1104 return retval;
1105
1106 if (serio->drv != &atkbd_drv) {
1107 retval = -ENODEV;
1108 goto out;
1109 }
1110
1111 retval = handler((struct atkbd *)serio_get_drvdata(serio), buf);
1112
1113 out:
1114 serio_unpin_driver(serio);
1115 return retval;
1116 }
1117
1118 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
1119 ssize_t (*handler)(struct atkbd *, const char *, size_t))
1120 {
1121 struct serio *serio = to_serio_port(dev);
1122 struct atkbd *atkbd;
1123 int retval;
1124
1125 retval = serio_pin_driver(serio);
1126 if (retval)
1127 return retval;
1128
1129 if (serio->drv != &atkbd_drv) {
1130 retval = -ENODEV;
1131 goto out;
1132 }
1133
1134 atkbd = serio_get_drvdata(serio);
1135 atkbd_disable(atkbd);
1136 retval = handler(atkbd, buf, count);
1137 atkbd_enable(atkbd);
1138
1139 out:
1140 serio_unpin_driver(serio);
1141 return retval;
1142 }
1143
1144 static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
1145 {
1146 return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
1147 }
1148
1149 static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
1150 {
1151 struct input_dev *old_dev, *new_dev;
1152 unsigned long value;
1153 char *rest;
1154 int err;
1155 unsigned char old_extra, old_set;
1156
1157 if (!atkbd->write)
1158 return -EIO;
1159
1160 value = simple_strtoul(buf, &rest, 10);
1161 if (*rest || value > 1)
1162 return -EINVAL;
1163
1164 if (atkbd->extra != value) {
1165 /*
1166 * Since device's properties will change we need to
1167 * unregister old device. But allocate and register
1168 * new one first to make sure we have it.
1169 */
1170 old_dev = atkbd->dev;
1171 old_extra = atkbd->extra;
1172 old_set = atkbd->set;
1173
1174 new_dev = input_allocate_device();
1175 if (!new_dev)
1176 return -ENOMEM;
1177
1178 atkbd->dev = new_dev;
1179 atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
1180 atkbd_activate(atkbd);
1181 atkbd_set_keycode_table(atkbd);
1182 atkbd_set_device_attrs(atkbd);
1183
1184 err = input_register_device(atkbd->dev);
1185 if (err) {
1186 input_free_device(new_dev);
1187
1188 atkbd->dev = old_dev;
1189 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1190 atkbd_set_keycode_table(atkbd);
1191 atkbd_set_device_attrs(atkbd);
1192
1193 return err;
1194 }
1195 input_unregister_device(old_dev);
1196
1197 }
1198 return count;
1199 }
1200
1201 static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
1202 {
1203 return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
1204 }
1205
1206 static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
1207 {
1208 struct input_dev *old_dev, *new_dev;
1209 unsigned long value;
1210 char *rest;
1211 int err;
1212 unsigned char old_scroll;
1213
1214 value = simple_strtoul(buf, &rest, 10);
1215 if (*rest || value > 1)
1216 return -EINVAL;
1217
1218 if (atkbd->scroll != value) {
1219 old_dev = atkbd->dev;
1220 old_scroll = atkbd->scroll;
1221
1222 new_dev = input_allocate_device();
1223 if (!new_dev)
1224 return -ENOMEM;
1225
1226 atkbd->dev = new_dev;
1227 atkbd->scroll = value;
1228 atkbd_set_keycode_table(atkbd);
1229 atkbd_set_device_attrs(atkbd);
1230
1231 err = input_register_device(atkbd->dev);
1232 if (err) {
1233 input_free_device(new_dev);
1234
1235 atkbd->scroll = old_scroll;
1236 atkbd->dev = old_dev;
1237 atkbd_set_keycode_table(atkbd);
1238 atkbd_set_device_attrs(atkbd);
1239
1240 return err;
1241 }
1242 input_unregister_device(old_dev);
1243 }
1244 return count;
1245 }
1246
1247 static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
1248 {
1249 return sprintf(buf, "%d\n", atkbd->set);
1250 }
1251
1252 static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
1253 {
1254 struct input_dev *old_dev, *new_dev;
1255 unsigned long value;
1256 char *rest;
1257 int err;
1258 unsigned char old_set, old_extra;
1259
1260 if (!atkbd->write)
1261 return -EIO;
1262
1263 value = simple_strtoul(buf, &rest, 10);
1264 if (*rest || (value != 2 && value != 3))
1265 return -EINVAL;
1266
1267 if (atkbd->set != value) {
1268 old_dev = atkbd->dev;
1269 old_extra = atkbd->extra;
1270 old_set = atkbd->set;
1271
1272 new_dev = input_allocate_device();
1273 if (!new_dev)
1274 return -ENOMEM;
1275
1276 atkbd->dev = new_dev;
1277 atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
1278 atkbd_activate(atkbd);
1279 atkbd_set_keycode_table(atkbd);
1280 atkbd_set_device_attrs(atkbd);
1281
1282 err = input_register_device(atkbd->dev);
1283 if (err) {
1284 input_free_device(new_dev);
1285
1286 atkbd->dev = old_dev;
1287 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1288 atkbd_set_keycode_table(atkbd);
1289 atkbd_set_device_attrs(atkbd);
1290
1291 return err;
1292 }
1293 input_unregister_device(old_dev);
1294 }
1295 return count;
1296 }
1297
1298 static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf)
1299 {
1300 return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
1301 }
1302
1303 static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count)
1304 {
1305 struct input_dev *old_dev, *new_dev;
1306 unsigned long value;
1307 char *rest;
1308 int err;
1309 unsigned char old_softrepeat, old_softraw;
1310
1311 if (!atkbd->write)
1312 return -EIO;
1313
1314 value = simple_strtoul(buf, &rest, 10);
1315 if (*rest || value > 1)
1316 return -EINVAL;
1317
1318 if (atkbd->softrepeat != value) {
1319 old_dev = atkbd->dev;
1320 old_softrepeat = atkbd->softrepeat;
1321 old_softraw = atkbd->softraw;
1322
1323 new_dev = input_allocate_device();
1324 if (!new_dev)
1325 return -ENOMEM;
1326
1327 atkbd->dev = new_dev;
1328 atkbd->softrepeat = value;
1329 if (atkbd->softrepeat)
1330 atkbd->softraw = 1;
1331 atkbd_set_device_attrs(atkbd);
1332
1333 err = input_register_device(atkbd->dev);
1334 if (err) {
1335 input_free_device(new_dev);
1336
1337 atkbd->dev = old_dev;
1338 atkbd->softrepeat = old_softrepeat;
1339 atkbd->softraw = old_softraw;
1340 atkbd_set_device_attrs(atkbd);
1341
1342 return err;
1343 }
1344 input_unregister_device(old_dev);
1345 }
1346 return count;
1347 }
1348
1349
1350 static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
1351 {
1352 return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
1353 }
1354
1355 static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
1356 {
1357 struct input_dev *old_dev, *new_dev;
1358 unsigned long value;
1359 char *rest;
1360 int err;
1361 unsigned char old_softraw;
1362
1363 value = simple_strtoul(buf, &rest, 10);
1364 if (*rest || value > 1)
1365 return -EINVAL;
1366
1367 if (atkbd->softraw != value) {
1368 old_dev = atkbd->dev;
1369 old_softraw = atkbd->softraw;
1370
1371 new_dev = input_allocate_device();
1372 if (!new_dev)
1373 return -ENOMEM;
1374
1375 atkbd->dev = new_dev;
1376 atkbd->softraw = value;
1377 atkbd_set_device_attrs(atkbd);
1378
1379 err = input_register_device(atkbd->dev);
1380 if (err) {
1381 input_free_device(new_dev);
1382
1383 atkbd->dev = old_dev;
1384 atkbd->softraw = old_softraw;
1385 atkbd_set_device_attrs(atkbd);
1386
1387 return err;
1388 }
1389 input_unregister_device(old_dev);
1390 }
1391 return count;
1392 }
1393
1394 static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
1395 {
1396 return sprintf(buf, "%lu\n", atkbd->err_count);
1397 }
1398
1399
1400 static int __init atkbd_init(void)
1401 {
1402 return serio_register_driver(&atkbd_drv);
1403 }
1404
1405 static void __exit atkbd_exit(void)
1406 {
1407 serio_unregister_driver(&atkbd_drv);
1408 }
1409
1410 module_init(atkbd_init);
1411 module_exit(atkbd_exit);
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