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, ¶m, 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); 1399