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 = dev->private; 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->private = atkbd; 887 input_dev->cdev.dev = &atkbd->ps2dev.serio->dev; 888 889 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REP) | BIT(EV_MSC); 890 891 if (atkbd->write) { 892 input_dev->evbit[0] |= BIT(EV_LED); 893 input_dev->ledbit[0] = BIT(LED_NUML) | BIT(LED_CAPSL) | BIT(LED_SCROLLL); 894 } 895 896 if (atkbd->extra) 897 input_dev->ledbit[0] |= BIT(LED_COMPOSE) | BIT(LED_SUSPEND) | 898 BIT(LED_SLEEP) | BIT(LED_MUTE) | BIT(LED_MISC); 899 900 if (!atkbd->softrepeat) { 901 input_dev->rep[REP_DELAY] = 250; 902 input_dev->rep[REP_PERIOD] = 33; 903 } 904 905 input_dev->mscbit[0] = atkbd->softraw ? BIT(MSC_SCAN) : BIT(MSC_RAW) | BIT(MSC_SCAN); 906 907 if (atkbd->scroll) { 908 input_dev->evbit[0] |= BIT(EV_REL); 909 input_dev->relbit[0] = BIT(REL_WHEEL) | BIT(REL_HWHEEL); 910 set_bit(BTN_MIDDLE, input_dev->keybit); 911 } 912 913 input_dev->keycode = atkbd->keycode; 914 input_dev->keycodesize = sizeof(unsigned char); 915 input_dev->keycodemax = ARRAY_SIZE(atkbd_set2_keycode); 916 917 for (i = 0; i < 512; i++) 918 if (atkbd->keycode[i] && atkbd->keycode[i] < ATKBD_SPECIAL) 919 set_bit(atkbd->keycode[i], input_dev->keybit); 920 } 921 922 /* 923 * atkbd_connect() is called when the serio module finds an interface 924 * that isn't handled yet by an appropriate device driver. We check if 925 * there is an AT keyboard out there and if yes, we register ourselves 926 * to the input module. 927 */ 928 929 static int atkbd_connect(struct serio *serio, struct serio_driver *drv) 930 { 931 struct atkbd *atkbd; 932 struct input_dev *dev; 933 int err = -ENOMEM; 934 935 atkbd = kzalloc(sizeof(struct atkbd), GFP_KERNEL); 936 dev = input_allocate_device(); 937 if (!atkbd || !dev) 938 goto fail1; 939 940 atkbd->dev = dev; 941 ps2_init(&atkbd->ps2dev, serio); 942 INIT_WORK(&atkbd->event_work, atkbd_event_work); 943 mutex_init(&atkbd->event_mutex); 944 945 switch (serio->id.type) { 946 947 case SERIO_8042_XL: 948 atkbd->translated = 1; 949 case SERIO_8042: 950 if (serio->write) 951 atkbd->write = 1; 952 break; 953 } 954 955 atkbd->softraw = atkbd_softraw; 956 atkbd->softrepeat = atkbd_softrepeat; 957 atkbd->scroll = atkbd_scroll; 958 959 if (atkbd->softrepeat) 960 atkbd->softraw = 1; 961 962 serio_set_drvdata(serio, atkbd); 963 964 err = serio_open(serio, drv); 965 if (err) 966 goto fail2; 967 968 if (atkbd->write) { 969 970 if (atkbd_probe(atkbd)) { 971 err = -ENODEV; 972 goto fail3; 973 } 974 975 atkbd->set = atkbd_select_set(atkbd, atkbd_set, atkbd_extra); 976 atkbd_activate(atkbd); 977 978 } else { 979 atkbd->set = 2; 980 atkbd->id = 0xab00; 981 } 982 983 atkbd_set_keycode_table(atkbd); 984 atkbd_set_device_attrs(atkbd); 985 986 err = sysfs_create_group(&serio->dev.kobj, &atkbd_attribute_group); 987 if (err) 988 goto fail3; 989 990 atkbd_enable(atkbd); 991 992 err = input_register_device(atkbd->dev); 993 if (err) 994 goto fail4; 995 996 return 0; 997 998 fail4: sysfs_remove_group(&serio->dev.kobj, &atkbd_attribute_group); 999 fail3: serio_close(serio); 1000 fail2: serio_set_drvdata(serio, NULL); 1001 fail1: input_free_device(dev); 1002 kfree(atkbd); 1003 return err; 1004 } 1005 1006 /* 1007 * atkbd_reconnect() tries to restore keyboard into a sane state and is 1008 * most likely called on resume. 1009 */ 1010 1011 static int atkbd_reconnect(struct serio *serio) 1012 { 1013 struct atkbd *atkbd = serio_get_drvdata(serio); 1014 struct serio_driver *drv = serio->drv; 1015 1016 if (!atkbd || !drv) { 1017 printk(KERN_DEBUG "atkbd: reconnect request, but serio is disconnected, ignoring...\n"); 1018 return -1; 1019 } 1020 1021 atkbd_disable(atkbd); 1022 1023 if (atkbd->write) { 1024 if (atkbd_probe(atkbd)) 1025 return -1; 1026 if (atkbd->set != atkbd_select_set(atkbd, atkbd->set, atkbd->extra)) 1027 return -1; 1028 1029 atkbd_activate(atkbd); 1030 1031 /* 1032 * Restore repeat rate and LEDs (that were reset by atkbd_activate) 1033 * to pre-resume state 1034 */ 1035 if (!atkbd->softrepeat) 1036 atkbd_set_repeat_rate(atkbd); 1037 atkbd_set_leds(atkbd); 1038 } 1039 1040 atkbd_enable(atkbd); 1041 1042 return 0; 1043 } 1044 1045 static struct serio_device_id atkbd_serio_ids[] = { 1046 { 1047 .type = SERIO_8042, 1048 .proto = SERIO_ANY, 1049 .id = SERIO_ANY, 1050 .extra = SERIO_ANY, 1051 }, 1052 { 1053 .type = SERIO_8042_XL, 1054 .proto = SERIO_ANY, 1055 .id = SERIO_ANY, 1056 .extra = SERIO_ANY, 1057 }, 1058 { 1059 .type = SERIO_RS232, 1060 .proto = SERIO_PS2SER, 1061 .id = SERIO_ANY, 1062 .extra = SERIO_ANY, 1063 }, 1064 { 0 } 1065 }; 1066 1067 MODULE_DEVICE_TABLE(serio, atkbd_serio_ids); 1068 1069 static struct serio_driver atkbd_drv = { 1070 .driver = { 1071 .name = "atkbd", 1072 }, 1073 .description = DRIVER_DESC, 1074 .id_table = atkbd_serio_ids, 1075 .interrupt = atkbd_interrupt, 1076 .connect = atkbd_connect, 1077 .reconnect = atkbd_reconnect, 1078 .disconnect = atkbd_disconnect, 1079 .cleanup = atkbd_cleanup, 1080 }; 1081 1082 static ssize_t atkbd_attr_show_helper(struct device *dev, char *buf, 1083 ssize_t (*handler)(struct atkbd *, char *)) 1084 { 1085 struct serio *serio = to_serio_port(dev); 1086 int retval; 1087 1088 retval = serio_pin_driver(serio); 1089 if (retval) 1090 return retval; 1091 1092 if (serio->drv != &atkbd_drv) { 1093 retval = -ENODEV; 1094 goto out; 1095 } 1096 1097 retval = handler((struct atkbd *)serio_get_drvdata(serio), buf); 1098 1099 out: 1100 serio_unpin_driver(serio); 1101 return retval; 1102 } 1103 1104 static ssize_t atkbd_attr_set_helper(struct device *dev, const char *buf, size_t count, 1105 ssize_t (*handler)(struct atkbd *, const char *, size_t)) 1106 { 1107 struct serio *serio = to_serio_port(dev); 1108 struct atkbd *atkbd; 1109 int retval; 1110 1111 retval = serio_pin_driver(serio); 1112 if (retval) 1113 return retval; 1114 1115 if (serio->drv != &atkbd_drv) { 1116 retval = -ENODEV; 1117 goto out; 1118 } 1119 1120 atkbd = serio_get_drvdata(serio); 1121 atkbd_disable(atkbd); 1122 retval = handler(atkbd, buf, count); 1123 atkbd_enable(atkbd); 1124 1125 out: 1126 serio_unpin_driver(serio); 1127 return retval; 1128 } 1129 1130 static ssize_t atkbd_show_extra(struct atkbd *atkbd, char *buf) 1131 { 1132 return sprintf(buf, "%d\n", atkbd->extra ? 1 : 0); 1133 } 1134 1135 static ssize_t atkbd_set_extra(struct atkbd *atkbd, const char *buf, size_t count) 1136 { 1137 struct input_dev *old_dev, *new_dev; 1138 unsigned long value; 1139 char *rest; 1140 int err; 1141 unsigned char old_extra, old_set; 1142 1143 if (!atkbd->write) 1144 return -EIO; 1145 1146 value = simple_strtoul(buf, &rest, 10); 1147 if (*rest || value > 1) 1148 return -EINVAL; 1149 1150 if (atkbd->extra != value) { 1151 /* 1152 * Since device's properties will change we need to 1153 * unregister old device. But allocate and register 1154 * new one first to make sure we have it. 1155 */ 1156 old_dev = atkbd->dev; 1157 old_extra = atkbd->extra; 1158 old_set = atkbd->set; 1159 1160 new_dev = input_allocate_device(); 1161 if (!new_dev) 1162 return -ENOMEM; 1163 1164 atkbd->dev = new_dev; 1165 atkbd->set = atkbd_select_set(atkbd, atkbd->set, value); 1166 atkbd_activate(atkbd); 1167 atkbd_set_keycode_table(atkbd); 1168 atkbd_set_device_attrs(atkbd); 1169 1170 err = input_register_device(atkbd->dev); 1171 if (err) { 1172 input_free_device(new_dev); 1173 1174 atkbd->dev = old_dev; 1175 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra); 1176 atkbd_set_keycode_table(atkbd); 1177 atkbd_set_device_attrs(atkbd); 1178 1179 return err; 1180 } 1181 input_unregister_device(old_dev); 1182 1183 } 1184 return count; 1185 } 1186 1187 static ssize_t atkbd_show_scroll(struct atkbd *atkbd, char *buf) 1188 { 1189 return sprintf(buf, "%d\n", atkbd->scroll ? 1 : 0); 1190 } 1191 1192 static ssize_t atkbd_set_scroll(struct atkbd *atkbd, const char *buf, size_t count) 1193 { 1194 struct input_dev *old_dev, *new_dev; 1195 unsigned long value; 1196 char *rest; 1197 int err; 1198 unsigned char old_scroll; 1199 1200 value = simple_strtoul(buf, &rest, 10); 1201 if (*rest || value > 1) 1202 return -EINVAL; 1203 1204 if (atkbd->scroll != value) { 1205 old_dev = atkbd->dev; 1206 old_scroll = atkbd->scroll; 1207 1208 new_dev = input_allocate_device(); 1209 if (!new_dev) 1210 return -ENOMEM; 1211 1212 atkbd->dev = new_dev; 1213 atkbd->scroll = value; 1214 atkbd_set_keycode_table(atkbd); 1215 atkbd_set_device_attrs(atkbd); 1216 1217 err = input_register_device(atkbd->dev); 1218 if (err) { 1219 input_free_device(new_dev); 1220 1221 atkbd->scroll = old_scroll; 1222 atkbd->dev = old_dev; 1223 atkbd_set_keycode_table(atkbd); 1224 atkbd_set_device_attrs(atkbd); 1225 1226 return err; 1227 } 1228 input_unregister_device(old_dev); 1229 } 1230 return count; 1231 } 1232 1233 static ssize_t atkbd_show_set(struct atkbd *atkbd, char *buf) 1234 { 1235 return sprintf(buf, "%d\n", atkbd->set); 1236 } 1237 1238 static ssize_t atkbd_set_set(struct atkbd *atkbd, const char *buf, size_t count) 1239 { 1240 struct input_dev *old_dev, *new_dev; 1241 unsigned long value; 1242 char *rest; 1243 int err; 1244 unsigned char old_set, old_extra; 1245 1246 if (!atkbd->write) 1247 return -EIO; 1248 1249 value = simple_strtoul(buf, &rest, 10); 1250 if (*rest || (value != 2 && value != 3)) 1251 return -EINVAL; 1252 1253 if (atkbd->set != value) { 1254 old_dev = atkbd->dev; 1255 old_extra = atkbd->extra; 1256 old_set = atkbd->set; 1257 1258 new_dev = input_allocate_device(); 1259 if (!new_dev) 1260 return -ENOMEM; 1261 1262 atkbd->dev = new_dev; 1263 atkbd->set = atkbd_select_set(atkbd, value, atkbd->extra); 1264 atkbd_activate(atkbd); 1265 atkbd_set_keycode_table(atkbd); 1266 atkbd_set_device_attrs(atkbd); 1267 1268 err = input_register_device(atkbd->dev); 1269 if (err) { 1270 input_free_device(new_dev); 1271 1272 atkbd->dev = old_dev; 1273 atkbd->set = atkbd_select_set(atkbd, old_set, old_extra); 1274 atkbd_set_keycode_table(atkbd); 1275 atkbd_set_device_attrs(atkbd); 1276 1277 return err; 1278 } 1279 input_unregister_device(old_dev); 1280 } 1281 return count; 1282 } 1283 1284 static ssize_t atkbd_show_softrepeat(struct atkbd *atkbd, char *buf) 1285 { 1286 return sprintf(buf, "%d\n", atkbd->softrepeat ? 1 : 0); 1287 } 1288 1289 static ssize_t atkbd_set_softrepeat(struct atkbd *atkbd, const char *buf, size_t count) 1290 { 1291 struct input_dev *old_dev, *new_dev; 1292 unsigned long value; 1293 char *rest; 1294 int err; 1295 unsigned char old_softrepeat, old_softraw; 1296 1297 if (!atkbd->write) 1298 return -EIO; 1299 1300 value = simple_strtoul(buf, &rest, 10); 1301 if (*rest || value > 1) 1302 return -EINVAL; 1303 1304 if (atkbd->softrepeat != value) { 1305 old_dev = atkbd->dev; 1306 old_softrepeat = atkbd->softrepeat; 1307 old_softraw = atkbd->softraw; 1308 1309 new_dev = input_allocate_device(); 1310 if (!new_dev) 1311 return -ENOMEM; 1312 1313 atkbd->dev = new_dev; 1314 atkbd->softrepeat = value; 1315 if (atkbd->softrepeat) 1316 atkbd->softraw = 1; 1317 atkbd_set_device_attrs(atkbd); 1318 1319 err = input_register_device(atkbd->dev); 1320 if (err) { 1321 input_free_device(new_dev); 1322 1323 atkbd->dev = old_dev; 1324 atkbd->softrepeat = old_softrepeat; 1325 atkbd->softraw = old_softraw; 1326 atkbd_set_device_attrs(atkbd); 1327 1328 return err; 1329 } 1330 input_unregister_device(old_dev); 1331 } 1332 return count; 1333 } 1334 1335 1336 static ssize_t atkbd_show_softraw(struct atkbd *atkbd, char *buf) 1337 { 1338 return sprintf(buf, "%d\n", atkbd->softraw ? 1 : 0); 1339 } 1340 1341 static ssize_t atkbd_set_softraw(struct atkbd *atkbd, const char *buf, size_t count) 1342 { 1343 struct input_dev *old_dev, *new_dev; 1344 unsigned long value; 1345 char *rest; 1346 int err; 1347 unsigned char old_softraw; 1348 1349 value = simple_strtoul(buf, &rest, 10); 1350 if (*rest || value > 1) 1351 return -EINVAL; 1352 1353 if (atkbd->softraw != value) { 1354 old_dev = atkbd->dev; 1355 old_softraw = atkbd->softraw; 1356 1357 new_dev = input_allocate_device(); 1358 if (!new_dev) 1359 return -ENOMEM; 1360 1361 atkbd->dev = new_dev; 1362 atkbd->softraw = value; 1363 atkbd_set_device_attrs(atkbd); 1364 1365 err = input_register_device(atkbd->dev); 1366 if (err) { 1367 input_free_device(new_dev); 1368 1369 atkbd->dev = old_dev; 1370 atkbd->softraw = old_softraw; 1371 atkbd_set_device_attrs(atkbd); 1372 1373 return err; 1374 } 1375 input_unregister_device(old_dev); 1376 } 1377 return count; 1378 } 1379 1380 static ssize_t atkbd_show_err_count(struct atkbd *atkbd, char *buf) 1381 { 1382 return sprintf(buf, "%lu\n", atkbd->err_count); 1383 } 1384 1385 1386 static int __init atkbd_init(void) 1387 { 1388 return serio_register_driver(&atkbd_drv); 1389 } 1390 1391 static void __exit atkbd_exit(void) 1392 { 1393 serio_unregister_driver(&atkbd_drv); 1394 } 1395 1396 module_init(atkbd_init); 1397 module_exit(atkbd_exit); 1398