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8bc9f51ae6c26668c14353e6bab43145e86aa5a1
[deliverable/linux.git] / drivers / input / mouse / psmouse-base.c
1 /*
2 * PS/2 mouse driver
3 *
4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
6 */
7
8 /*
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
12 */
13
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/slab.h>
18 #include <linux/interrupt.h>
19 #include <linux/input.h>
20 #include <linux/serio.h>
21 #include <linux/init.h>
22 #include <linux/libps2.h>
23 #include <linux/mutex.h>
24
25 #include "psmouse.h"
26 #include "synaptics.h"
27 #include "logips2pp.h"
28 #include "alps.h"
29 #include "lifebook.h"
30 #include "trackpoint.h"
31
32 #define DRIVER_DESC "PS/2 mouse driver"
33
34 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
35 MODULE_DESCRIPTION(DRIVER_DESC);
36 MODULE_LICENSE("GPL");
37
38 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
39 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
40 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
41 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
42 #define param_set_proto_abbrev psmouse_set_maxproto
43 #define param_get_proto_abbrev psmouse_get_maxproto
44 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
45 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
46
47 static unsigned int psmouse_resolution = 200;
48 module_param_named(resolution, psmouse_resolution, uint, 0644);
49 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
50
51 static unsigned int psmouse_rate = 100;
52 module_param_named(rate, psmouse_rate, uint, 0644);
53 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
54
55 static unsigned int psmouse_smartscroll = 1;
56 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
57 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
58
59 static unsigned int psmouse_resetafter = 5;
60 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
61 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
62
63 static unsigned int psmouse_resync_time;
64 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
65 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
66
67 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
68 NULL,
69 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
70 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
71 (void *) offsetof(struct psmouse, rate),
72 psmouse_show_int_attr, psmouse_attr_set_rate);
73 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
74 (void *) offsetof(struct psmouse, resolution),
75 psmouse_show_int_attr, psmouse_attr_set_resolution);
76 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
77 (void *) offsetof(struct psmouse, resetafter),
78 psmouse_show_int_attr, psmouse_set_int_attr);
79 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
80 (void *) offsetof(struct psmouse, resync_time),
81 psmouse_show_int_attr, psmouse_set_int_attr);
82
83 static struct attribute *psmouse_attributes[] = {
84 &psmouse_attr_protocol.dattr.attr,
85 &psmouse_attr_rate.dattr.attr,
86 &psmouse_attr_resolution.dattr.attr,
87 &psmouse_attr_resetafter.dattr.attr,
88 &psmouse_attr_resync_time.dattr.attr,
89 NULL
90 };
91
92 static struct attribute_group psmouse_attribute_group = {
93 .attrs = psmouse_attributes,
94 };
95
96 __obsolete_setup("psmouse_noext");
97 __obsolete_setup("psmouse_resolution=");
98 __obsolete_setup("psmouse_smartscroll=");
99 __obsolete_setup("psmouse_resetafter=");
100 __obsolete_setup("psmouse_rate=");
101
102 /*
103 * psmouse_mutex protects all operations changing state of mouse
104 * (connecting, disconnecting, changing rate or resolution via
105 * sysfs). We could use a per-device semaphore but since there
106 * rarely more than one PS/2 mouse connected and since semaphore
107 * is taken in "slow" paths it is not worth it.
108 */
109 static DEFINE_MUTEX(psmouse_mutex);
110
111 static struct workqueue_struct *kpsmoused_wq;
112
113 struct psmouse_protocol {
114 enum psmouse_type type;
115 char *name;
116 char *alias;
117 int maxproto;
118 int (*detect)(struct psmouse *, int);
119 int (*init)(struct psmouse *);
120 };
121
122 /*
123 * psmouse_process_byte() analyzes the PS/2 data stream and reports
124 * relevant events to the input module once full packet has arrived.
125 */
126
127 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
128 {
129 struct input_dev *dev = psmouse->dev;
130 unsigned char *packet = psmouse->packet;
131
132 if (psmouse->pktcnt < psmouse->pktsize)
133 return PSMOUSE_GOOD_DATA;
134
135 /*
136 * Full packet accumulated, process it
137 */
138
139 input_regs(dev, regs);
140
141 /*
142 * Scroll wheel on IntelliMice, scroll buttons on NetMice
143 */
144
145 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
146 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
147
148 /*
149 * Scroll wheel and buttons on IntelliMouse Explorer
150 */
151
152 if (psmouse->type == PSMOUSE_IMEX) {
153 switch (packet[3] & 0xC0) {
154 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
155 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
156 break;
157 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
158 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
159 break;
160 case 0x00:
161 case 0xC0:
162 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
163 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
164 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
165 break;
166 }
167 }
168
169 /*
170 * Extra buttons on Genius NewNet 3D
171 */
172
173 if (psmouse->type == PSMOUSE_GENPS) {
174 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
175 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
176 }
177
178 /*
179 * Extra button on ThinkingMouse
180 */
181 if (psmouse->type == PSMOUSE_THINKPS) {
182 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
183 /* Without this bit of weirdness moving up gives wildly high Y changes. */
184 packet[1] |= (packet[0] & 0x40) << 1;
185 }
186
187 /*
188 * Generic PS/2 Mouse
189 */
190
191 input_report_key(dev, BTN_LEFT, packet[0] & 1);
192 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
193 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
194
195 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
196 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
197
198 input_sync(dev);
199
200 return PSMOUSE_FULL_PACKET;
201 }
202
203 /*
204 * __psmouse_set_state() sets new psmouse state and resets all flags.
205 */
206
207 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
208 {
209 psmouse->state = new_state;
210 psmouse->pktcnt = psmouse->out_of_sync = 0;
211 psmouse->ps2dev.flags = 0;
212 psmouse->last = jiffies;
213 }
214
215
216 /*
217 * psmouse_set_state() sets new psmouse state and resets all flags and
218 * counters while holding serio lock so fighting with interrupt handler
219 * is not a concern.
220 */
221
222 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
223 {
224 serio_pause_rx(psmouse->ps2dev.serio);
225 __psmouse_set_state(psmouse, new_state);
226 serio_continue_rx(psmouse->ps2dev.serio);
227 }
228
229 /*
230 * psmouse_handle_byte() processes one byte of the input data stream
231 * by calling corresponding protocol handler.
232 */
233
234 static int psmouse_handle_byte(struct psmouse *psmouse, struct pt_regs *regs)
235 {
236 psmouse_ret_t rc = psmouse->protocol_handler(psmouse, regs);
237
238 switch (rc) {
239 case PSMOUSE_BAD_DATA:
240 if (psmouse->state == PSMOUSE_ACTIVATED) {
241 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
242 psmouse->name, psmouse->phys, psmouse->pktcnt);
243 if (++psmouse->out_of_sync == psmouse->resetafter) {
244 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
245 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
246 serio_reconnect(psmouse->ps2dev.serio);
247 return -1;
248 }
249 }
250 psmouse->pktcnt = 0;
251 break;
252
253 case PSMOUSE_FULL_PACKET:
254 psmouse->pktcnt = 0;
255 if (psmouse->out_of_sync) {
256 psmouse->out_of_sync = 0;
257 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
258 psmouse->name, psmouse->phys);
259 }
260 break;
261
262 case PSMOUSE_GOOD_DATA:
263 break;
264 }
265 return 0;
266 }
267
268 /*
269 * psmouse_interrupt() handles incoming characters, either passing them
270 * for normal processing or gathering them as command response.
271 */
272
273 static irqreturn_t psmouse_interrupt(struct serio *serio,
274 unsigned char data, unsigned int flags, struct pt_regs *regs)
275 {
276 struct psmouse *psmouse = serio_get_drvdata(serio);
277
278 if (psmouse->state == PSMOUSE_IGNORE)
279 goto out;
280
281 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
282 if (psmouse->state == PSMOUSE_ACTIVATED)
283 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
284 flags & SERIO_TIMEOUT ? " timeout" : "",
285 flags & SERIO_PARITY ? " bad parity" : "");
286 ps2_cmd_aborted(&psmouse->ps2dev);
287 goto out;
288 }
289
290 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
291 if (ps2_handle_ack(&psmouse->ps2dev, data))
292 goto out;
293
294 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
295 if (ps2_handle_response(&psmouse->ps2dev, data))
296 goto out;
297
298 if (psmouse->state <= PSMOUSE_RESYNCING)
299 goto out;
300
301 if (psmouse->state == PSMOUSE_ACTIVATED &&
302 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
303 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
304 psmouse->name, psmouse->phys, psmouse->pktcnt);
305 psmouse->badbyte = psmouse->packet[0];
306 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
307 queue_work(kpsmoused_wq, &psmouse->resync_work);
308 goto out;
309 }
310
311 psmouse->packet[psmouse->pktcnt++] = data;
312 /*
313 * Check if this is a new device announcement (0xAA 0x00)
314 */
315 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
316 if (psmouse->pktcnt == 1) {
317 psmouse->last = jiffies;
318 goto out;
319 }
320
321 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
322 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
323 serio_reconnect(serio);
324 goto out;
325 }
326 /*
327 * Not a new device, try processing first byte normally
328 */
329 psmouse->pktcnt = 1;
330 if (psmouse_handle_byte(psmouse, regs))
331 goto out;
332
333 psmouse->packet[psmouse->pktcnt++] = data;
334 }
335
336 /*
337 * See if we need to force resync because mouse was idle for too long
338 */
339 if (psmouse->state == PSMOUSE_ACTIVATED &&
340 psmouse->pktcnt == 1 && psmouse->resync_time &&
341 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
342 psmouse->badbyte = psmouse->packet[0];
343 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
344 queue_work(kpsmoused_wq, &psmouse->resync_work);
345 goto out;
346 }
347
348 psmouse->last = jiffies;
349 psmouse_handle_byte(psmouse, regs);
350
351 out:
352 return IRQ_HANDLED;
353 }
354
355
356 /*
357 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
358 * using sliced syntax, understood by advanced devices, such as Logitech
359 * or Synaptics touchpads. The command is encoded as:
360 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
361 * is the command.
362 */
363 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
364 {
365 int i;
366
367 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
368 return -1;
369
370 for (i = 6; i >= 0; i -= 2) {
371 unsigned char d = (command >> i) & 3;
372 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
373 return -1;
374 }
375
376 return 0;
377 }
378
379
380 /*
381 * psmouse_reset() resets the mouse into power-on state.
382 */
383 int psmouse_reset(struct psmouse *psmouse)
384 {
385 unsigned char param[2];
386
387 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
388 return -1;
389
390 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
391 return -1;
392
393 return 0;
394 }
395
396
397 /*
398 * Genius NetMouse magic init.
399 */
400 static int genius_detect(struct psmouse *psmouse, int set_properties)
401 {
402 struct ps2dev *ps2dev = &psmouse->ps2dev;
403 unsigned char param[4];
404
405 param[0] = 3;
406 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
407 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
408 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
409 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
410 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
411
412 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
413 return -1;
414
415 if (set_properties) {
416 set_bit(BTN_EXTRA, psmouse->dev->keybit);
417 set_bit(BTN_SIDE, psmouse->dev->keybit);
418 set_bit(REL_WHEEL, psmouse->dev->relbit);
419
420 psmouse->vendor = "Genius";
421 psmouse->name = "Mouse";
422 psmouse->pktsize = 4;
423 }
424
425 return 0;
426 }
427
428 /*
429 * IntelliMouse magic init.
430 */
431 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
432 {
433 struct ps2dev *ps2dev = &psmouse->ps2dev;
434 unsigned char param[2];
435
436 param[0] = 200;
437 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
438 param[0] = 100;
439 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
440 param[0] = 80;
441 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
442 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
443
444 if (param[0] != 3)
445 return -1;
446
447 if (set_properties) {
448 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
449 set_bit(REL_WHEEL, psmouse->dev->relbit);
450
451 if (!psmouse->vendor) psmouse->vendor = "Generic";
452 if (!psmouse->name) psmouse->name = "Wheel Mouse";
453 psmouse->pktsize = 4;
454 }
455
456 return 0;
457 }
458
459 /*
460 * Try IntelliMouse/Explorer magic init.
461 */
462 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
463 {
464 struct ps2dev *ps2dev = &psmouse->ps2dev;
465 unsigned char param[2];
466
467 intellimouse_detect(psmouse, 0);
468
469 param[0] = 200;
470 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
471 param[0] = 200;
472 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
473 param[0] = 80;
474 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
475 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
476
477 if (param[0] != 4)
478 return -1;
479
480 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
481 param[0] = 200;
482 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
483 param[0] = 80;
484 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
485 param[0] = 40;
486 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
487
488 param[0] = 200;
489 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
490 param[0] = 200;
491 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
492 param[0] = 60;
493 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
494
495 if (set_properties) {
496 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
497 set_bit(REL_WHEEL, psmouse->dev->relbit);
498 set_bit(REL_HWHEEL, psmouse->dev->relbit);
499 set_bit(BTN_SIDE, psmouse->dev->keybit);
500 set_bit(BTN_EXTRA, psmouse->dev->keybit);
501
502 if (!psmouse->vendor) psmouse->vendor = "Generic";
503 if (!psmouse->name) psmouse->name = "Explorer Mouse";
504 psmouse->pktsize = 4;
505 }
506
507 return 0;
508 }
509
510 /*
511 * Kensington ThinkingMouse / ExpertMouse magic init.
512 */
513 static int thinking_detect(struct psmouse *psmouse, int set_properties)
514 {
515 struct ps2dev *ps2dev = &psmouse->ps2dev;
516 unsigned char param[2];
517 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
518 int i;
519
520 param[0] = 10;
521 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
522 param[0] = 0;
523 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
524 for (i = 0; seq[i]; i++)
525 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
526 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
527
528 if (param[0] != 2)
529 return -1;
530
531 if (set_properties) {
532 set_bit(BTN_EXTRA, psmouse->dev->keybit);
533
534 psmouse->vendor = "Kensington";
535 psmouse->name = "ThinkingMouse";
536 }
537
538 return 0;
539 }
540
541 /*
542 * Bare PS/2 protocol "detection". Always succeeds.
543 */
544 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
545 {
546 if (set_properties) {
547 if (!psmouse->vendor) psmouse->vendor = "Generic";
548 if (!psmouse->name) psmouse->name = "Mouse";
549 }
550
551 return 0;
552 }
553
554
555 /*
556 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
557 * the mouse may have.
558 */
559
560 static int psmouse_extensions(struct psmouse *psmouse,
561 unsigned int max_proto, int set_properties)
562 {
563 int synaptics_hardware = 0;
564
565 /*
566 * We always check for lifebook because it does not disturb mouse
567 * (it only checks DMI information).
568 */
569 if (lifebook_detect(psmouse, set_properties) == 0) {
570 if (max_proto > PSMOUSE_IMEX) {
571 if (!set_properties || lifebook_init(psmouse) == 0)
572 return PSMOUSE_LIFEBOOK;
573 }
574 }
575
576 /*
577 * Try Kensington ThinkingMouse (we try first, because synaptics probe
578 * upsets the thinkingmouse).
579 */
580
581 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
582 return PSMOUSE_THINKPS;
583
584 /*
585 * Try Synaptics TouchPad
586 */
587 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
588 synaptics_hardware = 1;
589
590 if (max_proto > PSMOUSE_IMEX) {
591 if (!set_properties || synaptics_init(psmouse) == 0)
592 return PSMOUSE_SYNAPTICS;
593 /*
594 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
595 * Unfortunately Logitech/Genius probes confuse some firmware versions so
596 * we'll have to skip them.
597 */
598 max_proto = PSMOUSE_IMEX;
599 }
600 /*
601 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
602 */
603 synaptics_reset(psmouse);
604 }
605
606 /*
607 * Try ALPS TouchPad
608 */
609 if (max_proto > PSMOUSE_IMEX) {
610 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
611 if (alps_detect(psmouse, set_properties) == 0) {
612 if (!set_properties || alps_init(psmouse) == 0)
613 return PSMOUSE_ALPS;
614 /*
615 * Init failed, try basic relative protocols
616 */
617 max_proto = PSMOUSE_IMEX;
618 }
619 }
620
621 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
622 return PSMOUSE_GENPS;
623
624 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
625 return PSMOUSE_PS2PP;
626
627 if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
628 return PSMOUSE_TRACKPOINT;
629
630 /*
631 * Reset to defaults in case the device got confused by extended
632 * protocol probes. Note that we do full reset becuase some mice
633 * put themselves to sleep when see PSMOUSE_RESET_DIS.
634 */
635 psmouse_reset(psmouse);
636
637 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
638 return PSMOUSE_IMEX;
639
640 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
641 return PSMOUSE_IMPS;
642
643 /*
644 * Okay, all failed, we have a standard mouse here. The number of the buttons
645 * is still a question, though. We assume 3.
646 */
647 ps2bare_detect(psmouse, set_properties);
648
649 if (synaptics_hardware) {
650 /*
651 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
652 * We need to reset the touchpad because if there is a track point on the
653 * pass through port it could get disabled while probing for protocol
654 * extensions.
655 */
656 psmouse_reset(psmouse);
657 }
658
659 return PSMOUSE_PS2;
660 }
661
662 static struct psmouse_protocol psmouse_protocols[] = {
663 {
664 .type = PSMOUSE_PS2,
665 .name = "PS/2",
666 .alias = "bare",
667 .maxproto = 1,
668 .detect = ps2bare_detect,
669 },
670 {
671 .type = PSMOUSE_PS2PP,
672 .name = "PS2++",
673 .alias = "logitech",
674 .detect = ps2pp_init,
675 },
676 {
677 .type = PSMOUSE_THINKPS,
678 .name = "ThinkPS/2",
679 .alias = "thinkps",
680 .detect = thinking_detect,
681 },
682 {
683 .type = PSMOUSE_GENPS,
684 .name = "GenPS/2",
685 .alias = "genius",
686 .detect = genius_detect,
687 },
688 {
689 .type = PSMOUSE_IMPS,
690 .name = "ImPS/2",
691 .alias = "imps",
692 .maxproto = 1,
693 .detect = intellimouse_detect,
694 },
695 {
696 .type = PSMOUSE_IMEX,
697 .name = "ImExPS/2",
698 .alias = "exps",
699 .maxproto = 1,
700 .detect = im_explorer_detect,
701 },
702 {
703 .type = PSMOUSE_SYNAPTICS,
704 .name = "SynPS/2",
705 .alias = "synaptics",
706 .detect = synaptics_detect,
707 .init = synaptics_init,
708 },
709 {
710 .type = PSMOUSE_ALPS,
711 .name = "AlpsPS/2",
712 .alias = "alps",
713 .detect = alps_detect,
714 .init = alps_init,
715 },
716 {
717 .type = PSMOUSE_LIFEBOOK,
718 .name = "LBPS/2",
719 .alias = "lifebook",
720 .init = lifebook_init,
721 },
722 {
723 .type = PSMOUSE_TRACKPOINT,
724 .name = "TPPS/2",
725 .alias = "trackpoint",
726 .detect = trackpoint_detect,
727 },
728 {
729 .type = PSMOUSE_AUTO,
730 .name = "auto",
731 .alias = "any",
732 .maxproto = 1,
733 },
734 };
735
736 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
737 {
738 int i;
739
740 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
741 if (psmouse_protocols[i].type == type)
742 return &psmouse_protocols[i];
743
744 WARN_ON(1);
745 return &psmouse_protocols[0];
746 }
747
748 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
749 {
750 struct psmouse_protocol *p;
751 int i;
752
753 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
754 p = &psmouse_protocols[i];
755
756 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
757 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
758 return &psmouse_protocols[i];
759 }
760
761 return NULL;
762 }
763
764
765 /*
766 * psmouse_probe() probes for a PS/2 mouse.
767 */
768
769 static int psmouse_probe(struct psmouse *psmouse)
770 {
771 struct ps2dev *ps2dev = &psmouse->ps2dev;
772 unsigned char param[2];
773
774 /*
775 * First, we check if it's a mouse. It should send 0x00 or 0x03
776 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
777 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
778 * ID queries, probably due to a firmware bug.
779 */
780
781 param[0] = 0xa5;
782 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
783 return -1;
784
785 if (param[0] != 0x00 && param[0] != 0x03 &&
786 param[0] != 0x04 && param[0] != 0xff)
787 return -1;
788
789 /*
790 * Then we reset and disable the mouse so that it doesn't generate events.
791 */
792
793 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
794 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
795
796 return 0;
797 }
798
799 /*
800 * Here we set the mouse resolution.
801 */
802
803 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
804 {
805 unsigned char params[] = { 0, 1, 2, 2, 3 };
806
807 if (resolution == 0 || resolution > 200)
808 resolution = 200;
809
810 ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
811 psmouse->resolution = 25 << params[resolution / 50];
812 }
813
814 /*
815 * Here we set the mouse report rate.
816 */
817
818 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
819 {
820 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
821 int i = 0;
822
823 while (rates[i] > rate) i++;
824 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
825 psmouse->rate = rates[i];
826 }
827
828 /*
829 * psmouse_initialize() initializes the mouse to a sane state.
830 */
831
832 static void psmouse_initialize(struct psmouse *psmouse)
833 {
834 /*
835 * We set the mouse into streaming mode.
836 */
837
838 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
839
840 /*
841 * We set the mouse report rate, resolution and scaling.
842 */
843
844 if (psmouse_max_proto != PSMOUSE_PS2) {
845 psmouse->set_rate(psmouse, psmouse->rate);
846 psmouse->set_resolution(psmouse, psmouse->resolution);
847 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
848 }
849 }
850
851 /*
852 * psmouse_activate() enables the mouse so that we get motion reports from it.
853 */
854
855 static void psmouse_activate(struct psmouse *psmouse)
856 {
857 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
858 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
859 psmouse->ps2dev.serio->phys);
860
861 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
862 }
863
864
865 /*
866 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
867 * reports from it unless we explicitely request it.
868 */
869
870 static void psmouse_deactivate(struct psmouse *psmouse)
871 {
872 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
873 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
874 psmouse->ps2dev.serio->phys);
875
876 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
877 }
878
879 /*
880 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
881 */
882
883 static int psmouse_poll(struct psmouse *psmouse)
884 {
885 return ps2_command(&psmouse->ps2dev, psmouse->packet,
886 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
887 }
888
889
890 /*
891 * psmouse_resync() attempts to re-validate current protocol.
892 */
893
894 static void psmouse_resync(void *p)
895 {
896 struct psmouse *psmouse = p, *parent = NULL;
897 struct serio *serio = psmouse->ps2dev.serio;
898 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
899 int failed = 0, enabled = 0;
900 int i;
901
902 mutex_lock(&psmouse_mutex);
903
904 if (psmouse->state != PSMOUSE_RESYNCING)
905 goto out;
906
907 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
908 parent = serio_get_drvdata(serio->parent);
909 psmouse_deactivate(parent);
910 }
911
912 /*
913 * Some mice don't ACK commands sent while they are in the middle of
914 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
915 * instead of ps2_command() which would wait for 200ms for an ACK
916 * that may never come.
917 * As an additional quirk ALPS touchpads may not only forget to ACK
918 * disable command but will stop reporting taps, so if we see that
919 * mouse at least once ACKs disable we will do full reconnect if ACK
920 * is missing.
921 */
922 psmouse->num_resyncs++;
923
924 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
925 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
926 failed = 1;
927 } else
928 psmouse->acks_disable_command = 1;
929
930 /*
931 * Poll the mouse. If it was reset the packet will be shorter than
932 * psmouse->pktsize and ps2_command will fail. We do not expect and
933 * do not handle scenario when mouse "upgrades" its protocol while
934 * disconnected since it would require additional delay. If we ever
935 * see a mouse that does it we'll adjust the code.
936 */
937 if (!failed) {
938 if (psmouse->poll(psmouse))
939 failed = 1;
940 else {
941 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
942 for (i = 0; i < psmouse->pktsize; i++) {
943 psmouse->pktcnt++;
944 rc = psmouse->protocol_handler(psmouse, NULL);
945 if (rc != PSMOUSE_GOOD_DATA)
946 break;
947 }
948 if (rc != PSMOUSE_FULL_PACKET)
949 failed = 1;
950 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
951 }
952 }
953 /*
954 * Now try to enable mouse. We try to do that even if poll failed and also
955 * repeat our attempts 5 times, otherwise we may be left out with disabled
956 * mouse.
957 */
958 for (i = 0; i < 5; i++) {
959 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
960 enabled = 1;
961 break;
962 }
963 msleep(200);
964 }
965
966 if (!enabled) {
967 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
968 psmouse->ps2dev.serio->phys);
969 failed = 1;
970 }
971
972 if (failed) {
973 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
974 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
975 serio_reconnect(serio);
976 } else
977 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
978
979 if (parent)
980 psmouse_activate(parent);
981 out:
982 mutex_unlock(&psmouse_mutex);
983 }
984
985 /*
986 * psmouse_cleanup() resets the mouse into power-on state.
987 */
988
989 static void psmouse_cleanup(struct serio *serio)
990 {
991 struct psmouse *psmouse = serio_get_drvdata(serio);
992
993 psmouse_reset(psmouse);
994 }
995
996 /*
997 * psmouse_disconnect() closes and frees.
998 */
999
1000 static void psmouse_disconnect(struct serio *serio)
1001 {
1002 struct psmouse *psmouse, *parent = NULL;
1003
1004 psmouse = serio_get_drvdata(serio);
1005
1006 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1007
1008 mutex_lock(&psmouse_mutex);
1009
1010 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1011
1012 /* make sure we don't have a resync in progress */
1013 mutex_unlock(&psmouse_mutex);
1014 flush_workqueue(kpsmoused_wq);
1015 mutex_lock(&psmouse_mutex);
1016
1017 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1018 parent = serio_get_drvdata(serio->parent);
1019 psmouse_deactivate(parent);
1020 }
1021
1022 if (psmouse->disconnect)
1023 psmouse->disconnect(psmouse);
1024
1025 if (parent && parent->pt_deactivate)
1026 parent->pt_deactivate(parent);
1027
1028 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1029
1030 serio_close(serio);
1031 serio_set_drvdata(serio, NULL);
1032 input_unregister_device(psmouse->dev);
1033 kfree(psmouse);
1034
1035 if (parent)
1036 psmouse_activate(parent);
1037
1038 mutex_unlock(&psmouse_mutex);
1039 }
1040
1041 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
1042 {
1043 struct input_dev *input_dev = psmouse->dev;
1044
1045 input_dev->private = psmouse;
1046 input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1047
1048 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1049 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1050 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1051
1052 psmouse->set_rate = psmouse_set_rate;
1053 psmouse->set_resolution = psmouse_set_resolution;
1054 psmouse->poll = psmouse_poll;
1055 psmouse->protocol_handler = psmouse_process_byte;
1056 psmouse->pktsize = 3;
1057
1058 if (proto && (proto->detect || proto->init)) {
1059 if (proto->detect && proto->detect(psmouse, 1) < 0)
1060 return -1;
1061
1062 if (proto->init && proto->init(psmouse) < 0)
1063 return -1;
1064
1065 psmouse->type = proto->type;
1066 }
1067 else
1068 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1069
1070 /*
1071 * If mouse's packet size is 3 there is no point in polling the
1072 * device in hopes to detect protocol reset - we won't get less
1073 * than 3 bytes response anyhow.
1074 */
1075 if (psmouse->pktsize == 3)
1076 psmouse->resync_time = 0;
1077
1078 /*
1079 * Some smart KVMs fake response to POLL command returning just
1080 * 3 bytes and messing up our resync logic, so if initial poll
1081 * fails we won't try polling the device anymore. Hopefully
1082 * such KVM will maintain initially selected protocol.
1083 */
1084 if (psmouse->resync_time && psmouse->poll(psmouse))
1085 psmouse->resync_time = 0;
1086
1087 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1088 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1089
1090 input_dev->name = psmouse->devname;
1091 input_dev->phys = psmouse->phys;
1092 input_dev->id.bustype = BUS_I8042;
1093 input_dev->id.vendor = 0x0002;
1094 input_dev->id.product = psmouse->type;
1095 input_dev->id.version = psmouse->model;
1096
1097 return 0;
1098 }
1099
1100 /*
1101 * psmouse_connect() is a callback from the serio module when
1102 * an unhandled serio port is found.
1103 */
1104 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1105 {
1106 struct psmouse *psmouse, *parent = NULL;
1107 struct input_dev *input_dev;
1108 int retval = -ENOMEM;
1109
1110 mutex_lock(&psmouse_mutex);
1111
1112 /*
1113 * If this is a pass-through port deactivate parent so the device
1114 * connected to this port can be successfully identified
1115 */
1116 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1117 parent = serio_get_drvdata(serio->parent);
1118 psmouse_deactivate(parent);
1119 }
1120
1121 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1122 input_dev = input_allocate_device();
1123 if (!psmouse || !input_dev)
1124 goto out;
1125
1126 ps2_init(&psmouse->ps2dev, serio);
1127 INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
1128 psmouse->dev = input_dev;
1129 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1130
1131 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1132
1133 serio_set_drvdata(serio, psmouse);
1134
1135 retval = serio_open(serio, drv);
1136 if (retval)
1137 goto out;
1138
1139 if (psmouse_probe(psmouse) < 0) {
1140 serio_close(serio);
1141 retval = -ENODEV;
1142 goto out;
1143 }
1144
1145 psmouse->rate = psmouse_rate;
1146 psmouse->resolution = psmouse_resolution;
1147 psmouse->resetafter = psmouse_resetafter;
1148 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1149 psmouse->smartscroll = psmouse_smartscroll;
1150
1151 psmouse_switch_protocol(psmouse, NULL);
1152
1153 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1154 psmouse_initialize(psmouse);
1155
1156 input_register_device(psmouse->dev);
1157
1158 if (parent && parent->pt_activate)
1159 parent->pt_activate(parent);
1160
1161 sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1162
1163 psmouse_activate(psmouse);
1164
1165 retval = 0;
1166
1167 out:
1168 if (retval) {
1169 serio_set_drvdata(serio, NULL);
1170 input_free_device(input_dev);
1171 kfree(psmouse);
1172 }
1173
1174 /* If this is a pass-through port the parent needs to be re-activated */
1175 if (parent)
1176 psmouse_activate(parent);
1177
1178 mutex_unlock(&psmouse_mutex);
1179 return retval;
1180 }
1181
1182
1183 static int psmouse_reconnect(struct serio *serio)
1184 {
1185 struct psmouse *psmouse = serio_get_drvdata(serio);
1186 struct psmouse *parent = NULL;
1187 struct serio_driver *drv = serio->drv;
1188 int rc = -1;
1189
1190 if (!drv || !psmouse) {
1191 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1192 return -1;
1193 }
1194
1195 mutex_lock(&psmouse_mutex);
1196
1197 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1198 parent = serio_get_drvdata(serio->parent);
1199 psmouse_deactivate(parent);
1200 }
1201
1202 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1203
1204 if (psmouse->reconnect) {
1205 if (psmouse->reconnect(psmouse))
1206 goto out;
1207 } else if (psmouse_probe(psmouse) < 0 ||
1208 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1209 goto out;
1210
1211 /* ok, the device type (and capabilities) match the old one,
1212 * we can continue using it, complete intialization
1213 */
1214 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1215
1216 psmouse_initialize(psmouse);
1217
1218 if (parent && parent->pt_activate)
1219 parent->pt_activate(parent);
1220
1221 psmouse_activate(psmouse);
1222 rc = 0;
1223
1224 out:
1225 /* If this is a pass-through port the parent waits to be activated */
1226 if (parent)
1227 psmouse_activate(parent);
1228
1229 mutex_unlock(&psmouse_mutex);
1230 return rc;
1231 }
1232
1233 static struct serio_device_id psmouse_serio_ids[] = {
1234 {
1235 .type = SERIO_8042,
1236 .proto = SERIO_ANY,
1237 .id = SERIO_ANY,
1238 .extra = SERIO_ANY,
1239 },
1240 {
1241 .type = SERIO_PS_PSTHRU,
1242 .proto = SERIO_ANY,
1243 .id = SERIO_ANY,
1244 .extra = SERIO_ANY,
1245 },
1246 { 0 }
1247 };
1248
1249 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1250
1251 static struct serio_driver psmouse_drv = {
1252 .driver = {
1253 .name = "psmouse",
1254 },
1255 .description = DRIVER_DESC,
1256 .id_table = psmouse_serio_ids,
1257 .interrupt = psmouse_interrupt,
1258 .connect = psmouse_connect,
1259 .reconnect = psmouse_reconnect,
1260 .disconnect = psmouse_disconnect,
1261 .cleanup = psmouse_cleanup,
1262 };
1263
1264 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1265 char *buf)
1266 {
1267 struct serio *serio = to_serio_port(dev);
1268 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1269 struct psmouse *psmouse;
1270 int retval;
1271
1272 retval = serio_pin_driver(serio);
1273 if (retval)
1274 return retval;
1275
1276 if (serio->drv != &psmouse_drv) {
1277 retval = -ENODEV;
1278 goto out;
1279 }
1280
1281 psmouse = serio_get_drvdata(serio);
1282
1283 retval = attr->show(psmouse, attr->data, buf);
1284
1285 out:
1286 serio_unpin_driver(serio);
1287 return retval;
1288 }
1289
1290 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1291 const char *buf, size_t count)
1292 {
1293 struct serio *serio = to_serio_port(dev);
1294 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1295 struct psmouse *psmouse, *parent = NULL;
1296 int retval;
1297
1298 retval = serio_pin_driver(serio);
1299 if (retval)
1300 return retval;
1301
1302 if (serio->drv != &psmouse_drv) {
1303 retval = -ENODEV;
1304 goto out_unpin;
1305 }
1306
1307 retval = mutex_lock_interruptible(&psmouse_mutex);
1308 if (retval)
1309 goto out_unpin;
1310
1311 psmouse = serio_get_drvdata(serio);
1312
1313 if (psmouse->state == PSMOUSE_IGNORE) {
1314 retval = -ENODEV;
1315 goto out_unlock;
1316 }
1317
1318 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1319 parent = serio_get_drvdata(serio->parent);
1320 psmouse_deactivate(parent);
1321 }
1322
1323 psmouse_deactivate(psmouse);
1324
1325 retval = attr->set(psmouse, attr->data, buf, count);
1326
1327 if (retval != -ENODEV)
1328 psmouse_activate(psmouse);
1329
1330 if (parent)
1331 psmouse_activate(parent);
1332
1333 out_unlock:
1334 mutex_unlock(&psmouse_mutex);
1335 out_unpin:
1336 serio_unpin_driver(serio);
1337 return retval;
1338 }
1339
1340 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1341 {
1342 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1343
1344 return sprintf(buf, "%lu\n", *field);
1345 }
1346
1347 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1348 {
1349 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1350 unsigned long value;
1351 char *rest;
1352
1353 value = simple_strtoul(buf, &rest, 10);
1354 if (*rest)
1355 return -EINVAL;
1356
1357 *field = value;
1358
1359 return count;
1360 }
1361
1362 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1363 {
1364 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1365 }
1366
1367 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1368 {
1369 struct serio *serio = psmouse->ps2dev.serio;
1370 struct psmouse *parent = NULL;
1371 struct input_dev *new_dev;
1372 struct psmouse_protocol *proto;
1373 int retry = 0;
1374
1375 if (!(proto = psmouse_protocol_by_name(buf, count)))
1376 return -EINVAL;
1377
1378 if (psmouse->type == proto->type)
1379 return count;
1380
1381 if (!(new_dev = input_allocate_device()))
1382 return -ENOMEM;
1383
1384 while (serio->child) {
1385 if (++retry > 3) {
1386 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1387 input_free_device(new_dev);
1388 return -EIO;
1389 }
1390
1391 mutex_unlock(&psmouse_mutex);
1392 serio_unpin_driver(serio);
1393 serio_unregister_child_port(serio);
1394 serio_pin_driver_uninterruptible(serio);
1395 mutex_lock(&psmouse_mutex);
1396
1397 if (serio->drv != &psmouse_drv) {
1398 input_free_device(new_dev);
1399 return -ENODEV;
1400 }
1401
1402 if (psmouse->type == proto->type) {
1403 input_free_device(new_dev);
1404 return count; /* switched by other thread */
1405 }
1406 }
1407
1408 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1409 parent = serio_get_drvdata(serio->parent);
1410 if (parent->pt_deactivate)
1411 parent->pt_deactivate(parent);
1412 }
1413
1414 if (psmouse->disconnect)
1415 psmouse->disconnect(psmouse);
1416
1417 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1418 input_unregister_device(psmouse->dev);
1419
1420 psmouse->dev = new_dev;
1421 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1422
1423 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1424 psmouse_reset(psmouse);
1425 /* default to PSMOUSE_PS2 */
1426 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1427 }
1428
1429 psmouse_initialize(psmouse);
1430 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1431
1432 input_register_device(psmouse->dev);
1433
1434 if (parent && parent->pt_activate)
1435 parent->pt_activate(parent);
1436
1437 return count;
1438 }
1439
1440 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1441 {
1442 unsigned long value;
1443 char *rest;
1444
1445 value = simple_strtoul(buf, &rest, 10);
1446 if (*rest)
1447 return -EINVAL;
1448
1449 psmouse->set_rate(psmouse, value);
1450 return count;
1451 }
1452
1453 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1454 {
1455 unsigned long value;
1456 char *rest;
1457
1458 value = simple_strtoul(buf, &rest, 10);
1459 if (*rest)
1460 return -EINVAL;
1461
1462 psmouse->set_resolution(psmouse, value);
1463 return count;
1464 }
1465
1466
1467 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1468 {
1469 struct psmouse_protocol *proto;
1470
1471 if (!val)
1472 return -EINVAL;
1473
1474 proto = psmouse_protocol_by_name(val, strlen(val));
1475
1476 if (!proto || !proto->maxproto)
1477 return -EINVAL;
1478
1479 *((unsigned int *)kp->arg) = proto->type;
1480
1481 return 0;
1482 }
1483
1484 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1485 {
1486 int type = *((unsigned int *)kp->arg);
1487
1488 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1489 }
1490
1491 static int __init psmouse_init(void)
1492 {
1493 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1494 if (!kpsmoused_wq) {
1495 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1496 return -ENOMEM;
1497 }
1498
1499 serio_register_driver(&psmouse_drv);
1500
1501 return 0;
1502 }
1503
1504 static void __exit psmouse_exit(void)
1505 {
1506 serio_unregister_driver(&psmouse_drv);
1507 destroy_workqueue(kpsmoused_wq);
1508 }
1509
1510 module_init(psmouse_init);
1511 module_exit(psmouse_exit);
Linux kernel - Deliverables
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