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Merge branch 'linux-2.6'
[deliverable/linux.git] / drivers / input / keyboard / atkbd.c
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, 0,150,166, 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 0,139,150,163,165,115,152,150,166,140,160,154,113,114,167,168,
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 work_struct event_work;
223 struct mutex event_mutex;
224 unsigned long event_mask;
225 };
226
227 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
228 ssize_t (*handler)(struct atkbd *, char *));
229 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
230 ssize_t (*handler)(struct atkbd *, const char *, size_t));
231 #define ATKBD_DEFINE_ATTR(_name) \
232 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
233 static ssize_t atkbd_set_##_name(struct atkbd *, const char *, size_t); \
234 static ssize_t atkbd_do_show_##_name(struct device *d, \
235 struct device_attribute *attr, char *b) \
236 { \
237 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
238 } \
239 static ssize_t atkbd_do_set_##_name(struct device *d, \
240 struct device_attribute *attr, const char *b, size_t s) \
241 { \
242 return atkbd_attr_set_helper(d, b, s, atkbd_set_##_name); \
243 } \
244 static struct device_attribute atkbd_attr_##_name = \
245 __ATTR(_name, S_IWUSR | S_IRUGO, atkbd_do_show_##_name, atkbd_do_set_##_name);
246
247 ATKBD_DEFINE_ATTR(extra);
248 ATKBD_DEFINE_ATTR(scroll);
249 ATKBD_DEFINE_ATTR(set);
250 ATKBD_DEFINE_ATTR(softrepeat);
251 ATKBD_DEFINE_ATTR(softraw);
252
253 #define ATKBD_DEFINE_RO_ATTR(_name) \
254 static ssize_t atkbd_show_##_name(struct atkbd *, char *); \
255 static ssize_t atkbd_do_show_##_name(struct device *d, \
256 struct device_attribute *attr, char *b) \
257 { \
258 return atkbd_attr_show_helper(d, b, atkbd_show_##_name); \
259 } \
260 static struct device_attribute atkbd_attr_##_name = \
261 __ATTR(_name, S_IRUGO, atkbd_do_show_##_name, NULL);
262
263 ATKBD_DEFINE_RO_ATTR(err_count);
264
265 static struct attribute *atkbd_attributes[] = {
266 &atkbd_attr_extra.attr,
267 &atkbd_attr_scroll.attr,
268 &atkbd_attr_set.attr,
269 &atkbd_attr_softrepeat.attr,
270 &atkbd_attr_softraw.attr,
271 &atkbd_attr_err_count.attr,
272 NULL
273 };
274
275 static struct attribute_group atkbd_attribute_group = {
276 .attrs = atkbd_attributes,
277 };
278
279 static const unsigned int xl_table[] = {
280 ATKBD_RET_BAT, ATKBD_RET_ERR, ATKBD_RET_ACK,
281 ATKBD_RET_NAK, ATKBD_RET_HANJA, ATKBD_RET_HANGEUL,
282 };
283
284 /*
285 * Checks if we should mangle the scancode to extract 'release' bit
286 * in translated mode.
287 */
288 static int atkbd_need_xlate(unsigned long xl_bit, unsigned char code)
289 {
290 int i;
291
292 if (code == ATKBD_RET_EMUL0 || code == ATKBD_RET_EMUL1)
293 return 0;
294
295 for (i = 0; i < ARRAY_SIZE(xl_table); i++)
296 if (code == xl_table[i])
297 return test_bit(i, &xl_bit);
298
299 return 1;
300 }
301
302 /*
303 * Calculates new value of xl_bit so the driver can distinguish
304 * between make/break pair of scancodes for select keys and PS/2
305 * protocol responses.
306 */
307 static void atkbd_calculate_xl_bit(struct atkbd *atkbd, unsigned char code)
308 {
309 int i;
310
311 for (i = 0; i < ARRAY_SIZE(xl_table); i++) {
312 if (!((code ^ xl_table[i]) & 0x7f)) {
313 if (code & 0x80)
314 __clear_bit(i, &atkbd->xl_bit);
315 else
316 __set_bit(i, &atkbd->xl_bit);
317 break;
318 }
319 }
320 }
321
322 /*
323 * Encode the scancode, 0xe0 prefix, and high bit into a single integer,
324 * keeping kernel 2.4 compatibility for set 2
325 */
326 static unsigned int atkbd_compat_scancode(struct atkbd *atkbd, unsigned int code)
327 {
328 if (atkbd->set == 3) {
329 if (atkbd->emul == 1)
330 code |= 0x100;
331 } else {
332 code = (code & 0x7f) | ((code & 0x80) << 1);
333 if (atkbd->emul == 1)
334 code |= 0x80;
335 }
336
337 return code;
338 }
339
340 /*
341 * atkbd_interrupt(). Here takes place processing of data received from
342 * the keyboard into events.
343 */
344
345 static irqreturn_t atkbd_interrupt(struct serio *serio, unsigned char data,
346 unsigned int flags)
347 {
348 struct atkbd *atkbd = serio_get_drvdata(serio);
349 struct input_dev *dev = atkbd->dev;
350 unsigned int code = data;
351 int scroll = 0, hscroll = 0, click = -1, add_release_event = 0;
352 int value;
353 unsigned char keycode;
354
355 #ifdef ATKBD_DEBUG
356 printk(KERN_DEBUG "atkbd.c: Received %02x flags %02x\n", data, flags);
357 #endif
358
359 #if !defined(__i386__) && !defined (__x86_64__)
360 if ((flags & (SERIO_FRAME | SERIO_PARITY)) && (~flags & SERIO_TIMEOUT) && !atkbd->resend && atkbd->write) {
361 printk(KERN_WARNING "atkbd.c: frame/parity error: %02x\n", flags);
362 serio_write(serio, ATKBD_CMD_RESEND);
363 atkbd->resend = 1;
364 goto out;
365 }
366
367 if (!flags && data == ATKBD_RET_ACK)
368 atkbd->resend = 0;
369 #endif
370
371 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_ACK))
372 if (ps2_handle_ack(&atkbd->ps2dev, data))
373 goto out;
374
375 if (unlikely(atkbd->ps2dev.flags & PS2_FLAG_CMD))
376 if (ps2_handle_response(&atkbd->ps2dev, data))
377 goto out;
378
379 if (!atkbd->enabled)
380 goto out;
381
382 input_event(dev, EV_MSC, MSC_RAW, code);
383
384 if (atkbd->translated) {
385
386 if (atkbd->emul || atkbd_need_xlate(atkbd->xl_bit, code)) {
387 atkbd->release = code >> 7;
388 code &= 0x7f;
389 }
390
391 if (!atkbd->emul)
392 atkbd_calculate_xl_bit(atkbd, data);
393 }
394
395 switch (code) {
396 case ATKBD_RET_BAT:
397 atkbd->enabled = 0;
398 serio_reconnect(atkbd->ps2dev.serio);
399 goto out;
400 case ATKBD_RET_EMUL0:
401 atkbd->emul = 1;
402 goto out;
403 case ATKBD_RET_EMUL1:
404 atkbd->emul = 2;
405 goto out;
406 case ATKBD_RET_RELEASE:
407 atkbd->release = 1;
408 goto out;
409 case ATKBD_RET_ACK:
410 case ATKBD_RET_NAK:
411 printk(KERN_WARNING "atkbd.c: Spurious %s on %s. "
412 "Some program might be trying access hardware directly.\n",
413 data == ATKBD_RET_ACK ? "ACK" : "NAK", serio->phys);
414 goto out;
415 case ATKBD_RET_HANGEUL:
416 case ATKBD_RET_HANJA:
417 /*
418 * These keys do not report release and thus need to be
419 * flagged properly
420 */
421 add_release_event = 1;
422 break;
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 && add_release_event) {
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);
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 * Event callback from the input module. Events that change the state of
583 * the hardware are processed here. If action can not be performed in
584 * interrupt context it is offloaded to atkbd_event_work.
585 */
586
587 static int atkbd_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
588 {
589 struct atkbd *atkbd = input_get_drvdata(dev);
590
591 if (!atkbd->write)
592 return -1;
593
594 switch (type) {
595
596 case EV_LED:
597 set_bit(ATKBD_LED_EVENT_BIT, &atkbd->event_mask);
598 wmb();
599 schedule_work(&atkbd->event_work);
600 return 0;
601
602 case EV_REP:
603
604 if (!atkbd->softrepeat) {
605 set_bit(ATKBD_REP_EVENT_BIT, &atkbd->event_mask);
606 wmb();
607 schedule_work(&atkbd->event_work);
608 }
609
610 return 0;
611 }
612
613 return -1;
614 }
615
616 /*
617 * atkbd_enable() signals that interrupt handler is allowed to
618 * generate input events.
619 */
620
621 static inline void atkbd_enable(struct atkbd *atkbd)
622 {
623 serio_pause_rx(atkbd->ps2dev.serio);
624 atkbd->enabled = 1;
625 serio_continue_rx(atkbd->ps2dev.serio);
626 }
627
628 /*
629 * atkbd_disable() tells input handler that all incoming data except
630 * for ACKs and command response should be dropped.
631 */
632
633 static inline void atkbd_disable(struct atkbd *atkbd)
634 {
635 serio_pause_rx(atkbd->ps2dev.serio);
636 atkbd->enabled = 0;
637 serio_continue_rx(atkbd->ps2dev.serio);
638 }
639
640 /*
641 * atkbd_probe() probes for an AT keyboard on a serio port.
642 */
643
644 static int atkbd_probe(struct atkbd *atkbd)
645 {
646 struct ps2dev *ps2dev = &atkbd->ps2dev;
647 unsigned char param[2];
648
649 /*
650 * Some systems, where the bit-twiddling when testing the io-lines of the
651 * controller may confuse the keyboard need a full reset of the keyboard. On
652 * these systems the BIOS also usually doesn't do it for us.
653 */
654
655 if (atkbd_reset)
656 if (ps2_command(ps2dev, NULL, ATKBD_CMD_RESET_BAT))
657 printk(KERN_WARNING "atkbd.c: keyboard reset failed on %s\n", ps2dev->serio->phys);
658
659 /*
660 * Then we check the keyboard ID. We should get 0xab83 under normal conditions.
661 * Some keyboards report different values, but the first byte is always 0xab or
662 * 0xac. Some old AT keyboards don't report anything. If a mouse is connected, this
663 * should make sure we don't try to set the LEDs on it.
664 */
665
666 param[0] = param[1] = 0xa5; /* initialize with invalid values */
667 if (ps2_command(ps2dev, param, ATKBD_CMD_GETID)) {
668
669 /*
670 * If the get ID command failed, we check if we can at least set the LEDs on
671 * the keyboard. This should work on every keyboard out there. It also turns
672 * the LEDs off, which we want anyway.
673 */
674 param[0] = 0;
675 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
676 return -1;
677 atkbd->id = 0xabba;
678 return 0;
679 }
680
681 if (!ps2_is_keyboard_id(param[0]))
682 return -1;
683
684 atkbd->id = (param[0] << 8) | param[1];
685
686 if (atkbd->id == 0xaca1 && atkbd->translated) {
687 printk(KERN_ERR "atkbd.c: NCD terminal keyboards are only supported on non-translating\n");
688 printk(KERN_ERR "atkbd.c: controllers. Use i8042.direct=1 to disable translation.\n");
689 return -1;
690 }
691
692 return 0;
693 }
694
695 /*
696 * atkbd_select_set checks if a keyboard has a working Set 3 support, and
697 * sets it into that. Unfortunately there are keyboards that can be switched
698 * to Set 3, but don't work well in that (BTC Multimedia ...)
699 */
700
701 static int atkbd_select_set(struct atkbd *atkbd, int target_set, int allow_extra)
702 {
703 struct ps2dev *ps2dev = &atkbd->ps2dev;
704 unsigned char param[2];
705
706 atkbd->extra = 0;
707 /*
708 * For known special keyboards we can go ahead and set the correct set.
709 * We check for NCD PS/2 Sun, NorthGate OmniKey 101 and
710 * IBM RapidAccess / IBM EzButton / Chicony KBP-8993 keyboards.
711 */
712
713 if (atkbd->translated)
714 return 2;
715
716 if (atkbd->id == 0xaca1) {
717 param[0] = 3;
718 ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET);
719 return 3;
720 }
721
722 if (allow_extra) {
723 param[0] = 0x71;
724 if (!ps2_command(ps2dev, param, ATKBD_CMD_EX_ENABLE)) {
725 atkbd->extra = 1;
726 return 2;
727 }
728 }
729
730 if (target_set != 3)
731 return 2;
732
733 if (!ps2_command(ps2dev, param, ATKBD_CMD_OK_GETID)) {
734 atkbd->id = param[0] << 8 | param[1];
735 return 2;
736 }
737
738 param[0] = 3;
739 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
740 return 2;
741
742 param[0] = 0;
743 if (ps2_command(ps2dev, param, ATKBD_CMD_GSCANSET))
744 return 2;
745
746 if (param[0] != 3) {
747 param[0] = 2;
748 if (ps2_command(ps2dev, param, ATKBD_CMD_SSCANSET))
749 return 2;
750 }
751
752 ps2_command(ps2dev, param, ATKBD_CMD_SETALL_MBR);
753
754 return 3;
755 }
756
757 static int atkbd_activate(struct atkbd *atkbd)
758 {
759 struct ps2dev *ps2dev = &atkbd->ps2dev;
760 unsigned char param[1];
761
762 /*
763 * Set the LEDs to a defined state.
764 */
765
766 param[0] = 0;
767 if (ps2_command(ps2dev, param, ATKBD_CMD_SETLEDS))
768 return -1;
769
770 /*
771 * Set autorepeat to fastest possible.
772 */
773
774 param[0] = 0;
775 if (ps2_command(ps2dev, param, ATKBD_CMD_SETREP))
776 return -1;
777
778 /*
779 * Enable the keyboard to receive keystrokes.
780 */
781
782 if (ps2_command(ps2dev, NULL, ATKBD_CMD_ENABLE)) {
783 printk(KERN_ERR "atkbd.c: Failed to enable keyboard on %s\n",
784 ps2dev->serio->phys);
785 return -1;
786 }
787
788 return 0;
789 }
790
791 /*
792 * atkbd_cleanup() restores the keyboard state so that BIOS is happy after a
793 * reboot.
794 */
795
796 static void atkbd_cleanup(struct serio *serio)
797 {
798 struct atkbd *atkbd = serio_get_drvdata(serio);
799 ps2_command(&atkbd->ps2dev, NULL, ATKBD_CMD_RESET_BAT);
800 }
801
802
803 /*
804 * atkbd_disconnect() closes and frees.
805 */
806
807 static void atkbd_disconnect(struct serio *serio)
808 {
809 struct atkbd *atkbd = serio_get_drvdata(serio);
810
811 atkbd_disable(atkbd);
812
813 /* make sure we don't have a command in flight */
814 synchronize_sched(); /* Allow atkbd_interrupt()s to complete. */
815 flush_scheduled_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 /*
826 * atkbd_set_keycode_table() initializes keyboard's keycode table
827 * according to the selected scancode set
828 */
829
830 static void atkbd_set_keycode_table(struct atkbd *atkbd)
831 {
832 int i, j;
833
834 memset(atkbd->keycode, 0, sizeof(atkbd->keycode));
835
836 if (atkbd->translated) {
837 for (i = 0; i < 128; i++) {
838 atkbd->keycode[i] = atkbd_set2_keycode[atkbd_unxlate_table[i]];
839 atkbd->keycode[i | 0x80] = atkbd_set2_keycode[atkbd_unxlate_table[i] | 0x80];
840 if (atkbd->scroll)
841 for (j = 0; j < ARRAY_SIZE(atkbd_scroll_keys); j++)
842 if ((atkbd_unxlate_table[i] | 0x80) == atkbd_scroll_keys[j].set2)
843 atkbd->keycode[i | 0x80] = atkbd_scroll_keys[j].keycode;
844 }
845 } else if (atkbd->set == 3) {
846 memcpy(atkbd->keycode, atkbd_set3_keycode, sizeof(atkbd->keycode));
847 } else {
848 memcpy(atkbd->keycode, atkbd_set2_keycode, sizeof(atkbd->keycode));
849
850 if (atkbd->scroll)
851 for (i = 0; i < ARRAY_SIZE(atkbd_scroll_keys); i++)
852 atkbd->keycode[atkbd_scroll_keys[i].set2] = atkbd_scroll_keys[i].keycode;
853 }
854
855 atkbd->keycode[atkbd_compat_scancode(atkbd, ATKBD_RET_HANGEUL)] = KEY_HANGUEL;
856 atkbd->keycode[atkbd_compat_scancode(atkbd, ATKBD_RET_HANJA)] = KEY_HANJA;
857 }
858
859 /*
860 * atkbd_set_device_attrs() sets up keyboard's input device structure
861 */
862
863 static void atkbd_set_device_attrs(struct atkbd *atkbd)
864 {
865 struct input_dev *input_dev = atkbd->dev;
866 int i;
867
868 if (atkbd->extra)
869 snprintf(atkbd->name, sizeof(atkbd->name),
870 "AT Set 2 Extra keyboard");
871 else
872 snprintf(atkbd->name, sizeof(atkbd->name),
873 "AT %s Set %d keyboard",
874 atkbd->translated ? "Translated" : "Raw", atkbd->set);
875
876 snprintf(atkbd->phys, sizeof(atkbd->phys),
877 "%s/input0", atkbd->ps2dev.serio->phys);
878
879 input_dev->name = atkbd->name;
880 input_dev->phys = atkbd->phys;
881 input_dev->id.bustype = BUS_I8042;
882 input_dev->id.vendor = 0x0001;
883 input_dev->id.product = atkbd->translated ? 1 : atkbd->set;
884 input_dev->id.version = atkbd->id;
885 input_dev->event = atkbd_event;
886 input_dev->dev.parent = &atkbd->ps2dev.serio->dev;
887
888 input_set_drvdata(input_dev, atkbd);
889
890 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_MSC);
891
892 if (atkbd->write) {
893 input_dev->evbit[0] |= BIT(EV_LED);
894 input_dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL);
895 }
896
897 if (atkbd->extra)
898 input_dev->ledbit[0] |= BIT(LED_COMPOSE) | BIT(LED_SUSPEND) |
899 BIT(LED_SLEEP) | BIT(LED_MUTE) | BIT(LED_MISC);
900
901 if (!atkbd->softrepeat) {
902 input_dev->rep[REP_DELAY] = 250;
903 input_dev->rep[REP_PERIOD] = 33;
904 }
905
906 input_dev->mscbit[0] = atkbd->softraw ? BIT(MSC_SCAN) : BIT(MSC_RAW) | BIT(MSC_SCAN);
907
908 if (atkbd->scroll) {
909 input_dev->evbit[0] |= BIT(EV_REL);
910 input_dev->relbit[0] = BIT(REL_WHEEL) | BIT(REL_HWHEEL);
911 set_bit(BTN_MIDDLE, input_dev->keybit);
912 }
913
914 input_dev->keycode = atkbd->keycode;
915 input_dev->keycodesize = sizeof(unsigned char);
916 input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode);
917
918 for (i = 0; i < 512; i++)
919 if (atkbd->keycode[i] && atkbd->keycode[i] < ATKBD_SPECIAL)
920 set_bit(atkbd->keycode[i], input_dev->keybit);
921 }
922
923 /*
924 * atkbd_connect() is called when the serio module finds an interface
925 * that isn't handled yet by an appropriate device driver. We check if
926 * there is an AT keyboard out there and if yes, we register ourselves
927 * to the input module.
928 */
929
930 static int atkbd_connect(struct serio *serio, struct serio_driver *drv)
931 {
932 struct atkbd *atkbd;
933 struct input_dev *dev;
934 int err = -ENOMEM;
935
936 atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL);
937 dev = input_allocate_device();
938 if (!atkbd || !dev)
939 goto fail1;
940
941 atkbd->dev = dev;
942 ps2_init(&atkbd->ps2dev, serio);
943 INIT_WORK(&atkbd->event_work, atkbd_event_work);
944 mutex_init(&atkbd->event_mutex);
945
946 switch (serio->id.type) {
947
948 case SERIO_8042_XL:
949 atkbd->translated = 1;
950 case SERIO_8042:
951 if (serio->write)
952 atkbd->write = 1;
953 break;
954 }
955
956 atkbd->softraw = atkbd_softraw;
957 atkbd->softrepeat = atkbd_softrepeat;
958 atkbd->scroll = atkbd_scroll;
959
960 if (atkbd->softrepeat)
961 atkbd->softraw = 1;
962
963 serio_set_drvdata(serio, atkbd);
964
965 err = serio_open(serio, drv);
966 if (err)
967 goto fail2;
968
969 if (atkbd->write) {
970
971 if (atkbd_probe(atkbd)) {
972 err = -ENODEV;
973 goto fail3;
974 }
975
976 atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra);
977 atkbd_activate(atkbd);
978
979 } else {
980 atkbd->set = 2;
981 atkbd->id = 0xab00;
982 }
983
984 atkbd_set_keycode_table(atkbd);
985 atkbd_set_device_attrs(atkbd);
986
987 err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group);
988 if (err)
989 goto fail3;
990
991 atkbd_enable(atkbd);
992
993 err = input_register_device(atkbd->dev);
994 if (err)
995 goto fail4;
996
997 return 0;
998
999 fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group);
1000 fail3: serio_close(serio);
1001 fail2: serio_set_drvdata(serio, NULL);
1002 fail1: input_free_device(dev);
1003 kfree(atkbd);
1004 return err;
1005 }
1006
1007 /*
1008 * atkbd_reconnect() tries to restore keyboard into a sane state and is
1009 * most likely called on resume.
1010 */
1011
1012 static int atkbd_reconnect(struct serio *serio)
1013 {
1014 struct atkbd *atkbd = serio_get_drvdata(serio);
1015 struct serio_driver *drv = serio->drv;
1016
1017 if (!atkbd || !drv) {
1018 printk(KERN_DEBUG "atkbd: reconnect request, but serio is disconnected, ignoring...\n");
1019 return -1;
1020 }
1021
1022 atkbd_disable(atkbd);
1023
1024 if (atkbd->write) {
1025 if (atkbd_probe(atkbd))
1026 return -1;
1027 if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra))
1028 return -1;
1029
1030 atkbd_activate(atkbd);
1031
1032 /*
1033 * Restore repeat rate and LEDs (that were reset by atkbd_activate)
1034 * to pre-resume state
1035 */
1036 if (!atkbd->softrepeat)
1037 atkbd_set_repeat_rate(atkbd);
1038 atkbd_set_leds(atkbd);
1039 }
1040
1041 atkbd_enable(atkbd);
1042
1043 return 0;
1044 }
1045
1046 static struct serio_device_id atkbd_serio_ids[] = {
1047 {
1048 .type = SERIO_8042,
1049 .proto = SERIO_ANY,
1050 .id = SERIO_ANY,
1051 .extra = SERIO_ANY,
1052 },
1053 {
1054 .type = SERIO_8042_XL,
1055 .proto = SERIO_ANY,
1056 .id = SERIO_ANY,
1057 .extra = SERIO_ANY,
1058 },
1059 {
1060 .type = SERIO_RS232,
1061 .proto = SERIO_PS2SER,
1062 .id = SERIO_ANY,
1063 .extra = SERIO_ANY,
1064 },
1065 { 0 }
1066 };
1067
1068 MODULE_DEVICE_TABLE(serio, atkbd_serio_ids);
1069
1070 static struct serio_driver atkbd_drv = {
1071 .driver = {
1072 .name = "atkbd",
1073 },
1074 .description = DRIVER_DESC,
1075 .id_table = atkbd_serio_ids,
1076 .interrupt = atkbd_interrupt,
1077 .connect = atkbd_connect,
1078 .reconnect = atkbd_reconnect,
1079 .disconnect = atkbd_disconnect,
1080 .cleanup = atkbd_cleanup,
1081 };
1082
1083 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf,
1084 ssize_t (*handler)(struct atkbd *, char *))
1085 {
1086 struct serio *serio = to_serio_port(dev);
1087 int retval;
1088
1089 retval = serio_pin_driver(serio);
1090 if (retval)
1091 return retval;
1092
1093 if (serio->drv != &atkbd_drv) {
1094 retval = -ENODEV;
1095 goto out;
1096 }
1097
1098 retval = handler((struct atkbd *)serio_get_drvdata(serio), buf);
1099
1100 out:
1101 serio_unpin_driver(serio);
1102 return retval;
1103 }
1104
1105 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count,
1106 ssize_t (*handler)(struct atkbd *, const char *, size_t))
1107 {
1108 struct serio *serio = to_serio_port(dev);
1109 struct atkbd *atkbd;
1110 int retval;
1111
1112 retval = serio_pin_driver(serio);
1113 if (retval)
1114 return retval;
1115
1116 if (serio->drv != &atkbd_drv) {
1117 retval = -ENODEV;
1118 goto out;
1119 }
1120
1121 atkbd = serio_get_drvdata(serio);
1122 atkbd_disable(atkbd);
1123 retval = handler(atkbd, buf, count);
1124 atkbd_enable(atkbd);
1125
1126 out:
1127 serio_unpin_driver(serio);
1128 return retval;
1129 }
1130
1131 static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf)
1132 {
1133 return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0);
1134 }
1135
1136 static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count)
1137 {
1138 struct input_dev *old_dev, *new_dev;
1139 unsigned long value;
1140 char *rest;
1141 int err;
1142 unsigned char old_extra, old_set;
1143
1144 if (!atkbd->write)
1145 return -EIO;
1146
1147 value = simple_strtoul(buf, &rest, 10);
1148 if (*rest || value > 1)
1149 return -EINVAL;
1150
1151 if (atkbd->extra != value) {
1152 /*
1153 * Since device's properties will change we need to
1154 * unregister old device. But allocate and register
1155 * new one first to make sure we have it.
1156 */
1157 old_dev = atkbd->dev;
1158 old_extra = atkbd->extra;
1159 old_set = atkbd->set;
1160
1161 new_dev = input_allocate_device();
1162 if (!new_dev)
1163 return -ENOMEM;
1164
1165 atkbd->dev = new_dev;
1166 atkbd->set = atkbd_select_set(atkbd, atkbd->set, value);
1167 atkbd_activate(atkbd);
1168 atkbd_set_keycode_table(atkbd);
1169 atkbd_set_device_attrs(atkbd);
1170
1171 err = input_register_device(atkbd->dev);
1172 if (err) {
1173 input_free_device(new_dev);
1174
1175 atkbd->dev = old_dev;
1176 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
1177 atkbd_set_keycode_table(atkbd);
1178 atkbd_set_device_attrs(atkbd);
1179
1180 return err;
1181 }
1182 input_unregister_device(old_dev);
1183
1184 }
1185 return count;
1186 }
1187
1188 static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf)
1189 {
1190 return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0);
1191 }
1192
1193 static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count)
1194 {
1195 struct input_dev *old_dev, *new_dev;
1196 unsigned long value;
1197 char *rest;
1198 int err;
1199 unsigned char old_scroll;
1200
1201 value = simple_strtoul(buf, &rest, 10);
1202 if (*rest || value > 1)
1203 return -EINVAL;
1204
1205 if (atkbd->scroll != value) {
1206 old_dev = atkbd->dev;
1207 old_scroll = atkbd->scroll;
1208
1209 new_dev = input_allocate_device();
1210 if (!new_dev)
1211 return -ENOMEM;
1212
1213 atkbd->dev = new_dev;
1214 atkbd->scroll = value;
1215 atkbd_set_keycode_table(atkbd);
1216 atkbd_set_device_attrs(atkbd);
1217
1218 err = input_register_device(atkbd->dev);
1219 if (err) {
1220 input_free_device(new_dev);
1221
1222 atkbd->scroll = old_scroll;
1223 atkbd->dev = old_dev;
1224 atkbd_set_keycode_table(atkbd);
1225 atkbd_set_device_attrs(atkbd);
1226
1227 return err;
1228 }
1229 input_unregister_device(old_dev);
1230 }
1231 return count;
1232 }
1233
1234 static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf)
1235 {
1236 return sprintf(buf, "%d\n", atkbd->set);
1237 }
1238
1239 static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count)
1240 {
1241 struct input_dev *old_dev, *new_dev;
1242 unsigned long value;
1243 char *rest;
1244 int err;
1245 unsigned char old_set, old_extra;
1246
1247 if (!atkbd->write)
1248 return -EIO;
1249
1250 value = simple_strtoul(buf, &rest, 10);
1251 if (*rest || (value != 2 && value != 3))
1252 return -EINVAL;
1253
1254 if (atkbd->set != value) {
1255 old_dev = atkbd->dev;
1256 old_extra = atkbd->extra;
1257 old_set = atkbd->set;
1258
1259 new_dev = input_allocate_device();
1260 if (!new_dev)
1261 return -ENOMEM;
1262
1263 atkbd->dev = new_dev;
1264 atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra);
1265 atkbd_activate(atkbd);
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->dev = old_dev;
1274 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra);
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_softrepeat(struct atkbd *atkbd, char *buf)
1286 {
1287 return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0);
1288 }
1289
1290 static ssize_t atkbd_set_softrepeat(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_softrepeat, old_softraw;
1297
1298 if (!atkbd->write)
1299 return -EIO;
1300
1301 value = simple_strtoul(buf, &rest, 10);
1302 if (*rest || value > 1)
1303 return -EINVAL;
1304
1305 if (atkbd->softrepeat != value) {
1306 old_dev = atkbd->dev;
1307 old_softrepeat = atkbd->softrepeat;
1308 old_softraw = atkbd->softraw;
1309
1310 new_dev = input_allocate_device();
1311 if (!new_dev)
1312 return -ENOMEM;
1313
1314 atkbd->dev = new_dev;
1315 atkbd->softrepeat = value;
1316 if (atkbd->softrepeat)
1317 atkbd->softraw = 1;
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->softrepeat = old_softrepeat;
1326 atkbd->softraw = old_softraw;
1327 atkbd_set_device_attrs(atkbd);
1328
1329 return err;
1330 }
1331 input_unregister_device(old_dev);
1332 }
1333 return count;
1334 }
1335
1336
1337 static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf)
1338 {
1339 return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0);
1340 }
1341
1342 static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count)
1343 {
1344 struct input_dev *old_dev, *new_dev;
1345 unsigned long value;
1346 char *rest;
1347 int err;
1348 unsigned char old_softraw;
1349
1350 value = simple_strtoul(buf, &rest, 10);
1351 if (*rest || value > 1)
1352 return -EINVAL;
1353
1354 if (atkbd->softraw != value) {
1355 old_dev = atkbd->dev;
1356 old_softraw = atkbd->softraw;
1357
1358 new_dev = input_allocate_device();
1359 if (!new_dev)
1360 return -ENOMEM;
1361
1362 atkbd->dev = new_dev;
1363 atkbd->softraw = value;
1364 atkbd_set_device_attrs(atkbd);
1365
1366 err = input_register_device(atkbd->dev);
1367 if (err) {
1368 input_free_device(new_dev);
1369
1370 atkbd->dev = old_dev;
1371 atkbd->softraw = old_softraw;
1372 atkbd_set_device_attrs(atkbd);
1373
1374 return err;
1375 }
1376 input_unregister_device(old_dev);
1377 }
1378 return count;
1379 }
1380
1381 static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf)
1382 {
1383 return sprintf(buf, "%lu\n", atkbd->err_count);
1384 }
1385
1386
1387 static int __init atkbd_init(void)
1388 {
1389 return serio_register_driver(&atkbd_drv);
1390 }
1391
1392 static void __exit atkbd_exit(void)
1393 {
1394 serio_unregister_driver(&atkbd_drv);
1395 }
1396
1397 module_init(atkbd_init);
1398 module_exit(atkbd_exit);
Linux kernel - Deliverables
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