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Input: psmouse - fix Intellimouse 4.0 initialization
[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 if (set_properties) {
489 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
490 set_bit(REL_WHEEL, psmouse->dev->relbit);
491 set_bit(REL_HWHEEL, psmouse->dev->relbit);
492 set_bit(BTN_SIDE, psmouse->dev->keybit);
493 set_bit(BTN_EXTRA, psmouse->dev->keybit);
494
495 if (!psmouse->vendor) psmouse->vendor = "Generic";
496 if (!psmouse->name) psmouse->name = "Explorer Mouse";
497 psmouse->pktsize = 4;
498 }
499
500 return 0;
501 }
502
503 /*
504 * Kensington ThinkingMouse / ExpertMouse magic init.
505 */
506 static int thinking_detect(struct psmouse *psmouse, int set_properties)
507 {
508 struct ps2dev *ps2dev = &psmouse->ps2dev;
509 unsigned char param[2];
510 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
511 int i;
512
513 param[0] = 10;
514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
515 param[0] = 0;
516 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
517 for (i = 0; seq[i]; i++)
518 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
519 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
520
521 if (param[0] != 2)
522 return -1;
523
524 if (set_properties) {
525 set_bit(BTN_EXTRA, psmouse->dev->keybit);
526
527 psmouse->vendor = "Kensington";
528 psmouse->name = "ThinkingMouse";
529 }
530
531 return 0;
532 }
533
534 /*
535 * Bare PS/2 protocol "detection". Always succeeds.
536 */
537 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
538 {
539 if (set_properties) {
540 if (!psmouse->vendor) psmouse->vendor = "Generic";
541 if (!psmouse->name) psmouse->name = "Mouse";
542 }
543
544 return 0;
545 }
546
547
548 /*
549 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
550 * the mouse may have.
551 */
552
553 static int psmouse_extensions(struct psmouse *psmouse,
554 unsigned int max_proto, int set_properties)
555 {
556 int synaptics_hardware = 0;
557
558 /*
559 * We always check for lifebook because it does not disturb mouse
560 * (it only checks DMI information).
561 */
562 if (lifebook_detect(psmouse, set_properties) == 0) {
563 if (max_proto > PSMOUSE_IMEX) {
564 if (!set_properties || lifebook_init(psmouse) == 0)
565 return PSMOUSE_LIFEBOOK;
566 }
567 }
568
569 /*
570 * Try Kensington ThinkingMouse (we try first, because synaptics probe
571 * upsets the thinkingmouse).
572 */
573
574 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
575 return PSMOUSE_THINKPS;
576
577 /*
578 * Try Synaptics TouchPad
579 */
580 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
581 synaptics_hardware = 1;
582
583 if (max_proto > PSMOUSE_IMEX) {
584 if (!set_properties || synaptics_init(psmouse) == 0)
585 return PSMOUSE_SYNAPTICS;
586 /*
587 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
588 * Unfortunately Logitech/Genius probes confuse some firmware versions so
589 * we'll have to skip them.
590 */
591 max_proto = PSMOUSE_IMEX;
592 }
593 /*
594 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
595 */
596 synaptics_reset(psmouse);
597 }
598
599 /*
600 * Try ALPS TouchPad
601 */
602 if (max_proto > PSMOUSE_IMEX) {
603 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
604 if (alps_detect(psmouse, set_properties) == 0) {
605 if (!set_properties || alps_init(psmouse) == 0)
606 return PSMOUSE_ALPS;
607 /*
608 * Init failed, try basic relative protocols
609 */
610 max_proto = PSMOUSE_IMEX;
611 }
612 }
613
614 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
615 return PSMOUSE_GENPS;
616
617 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
618 return PSMOUSE_PS2PP;
619
620 if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
621 return PSMOUSE_TRACKPOINT;
622
623 /*
624 * Reset to defaults in case the device got confused by extended
625 * protocol probes. Note that we do full reset becuase some mice
626 * put themselves to sleep when see PSMOUSE_RESET_DIS.
627 */
628 psmouse_reset(psmouse);
629
630 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
631 return PSMOUSE_IMEX;
632
633 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
634 return PSMOUSE_IMPS;
635
636 /*
637 * Okay, all failed, we have a standard mouse here. The number of the buttons
638 * is still a question, though. We assume 3.
639 */
640 ps2bare_detect(psmouse, set_properties);
641
642 if (synaptics_hardware) {
643 /*
644 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
645 * We need to reset the touchpad because if there is a track point on the
646 * pass through port it could get disabled while probing for protocol
647 * extensions.
648 */
649 psmouse_reset(psmouse);
650 }
651
652 return PSMOUSE_PS2;
653 }
654
655 static struct psmouse_protocol psmouse_protocols[] = {
656 {
657 .type = PSMOUSE_PS2,
658 .name = "PS/2",
659 .alias = "bare",
660 .maxproto = 1,
661 .detect = ps2bare_detect,
662 },
663 {
664 .type = PSMOUSE_PS2PP,
665 .name = "PS2++",
666 .alias = "logitech",
667 .detect = ps2pp_init,
668 },
669 {
670 .type = PSMOUSE_THINKPS,
671 .name = "ThinkPS/2",
672 .alias = "thinkps",
673 .detect = thinking_detect,
674 },
675 {
676 .type = PSMOUSE_GENPS,
677 .name = "GenPS/2",
678 .alias = "genius",
679 .detect = genius_detect,
680 },
681 {
682 .type = PSMOUSE_IMPS,
683 .name = "ImPS/2",
684 .alias = "imps",
685 .maxproto = 1,
686 .detect = intellimouse_detect,
687 },
688 {
689 .type = PSMOUSE_IMEX,
690 .name = "ImExPS/2",
691 .alias = "exps",
692 .maxproto = 1,
693 .detect = im_explorer_detect,
694 },
695 {
696 .type = PSMOUSE_SYNAPTICS,
697 .name = "SynPS/2",
698 .alias = "synaptics",
699 .detect = synaptics_detect,
700 .init = synaptics_init,
701 },
702 {
703 .type = PSMOUSE_ALPS,
704 .name = "AlpsPS/2",
705 .alias = "alps",
706 .detect = alps_detect,
707 .init = alps_init,
708 },
709 {
710 .type = PSMOUSE_LIFEBOOK,
711 .name = "LBPS/2",
712 .alias = "lifebook",
713 .init = lifebook_init,
714 },
715 {
716 .type = PSMOUSE_TRACKPOINT,
717 .name = "TPPS/2",
718 .alias = "trackpoint",
719 .detect = trackpoint_detect,
720 },
721 {
722 .type = PSMOUSE_AUTO,
723 .name = "auto",
724 .alias = "any",
725 .maxproto = 1,
726 },
727 };
728
729 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
730 {
731 int i;
732
733 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
734 if (psmouse_protocols[i].type == type)
735 return &psmouse_protocols[i];
736
737 WARN_ON(1);
738 return &psmouse_protocols[0];
739 }
740
741 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
742 {
743 struct psmouse_protocol *p;
744 int i;
745
746 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
747 p = &psmouse_protocols[i];
748
749 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
750 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
751 return &psmouse_protocols[i];
752 }
753
754 return NULL;
755 }
756
757
758 /*
759 * psmouse_probe() probes for a PS/2 mouse.
760 */
761
762 static int psmouse_probe(struct psmouse *psmouse)
763 {
764 struct ps2dev *ps2dev = &psmouse->ps2dev;
765 unsigned char param[2];
766
767 /*
768 * First, we check if it's a mouse. It should send 0x00 or 0x03
769 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
770 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
771 * ID queries, probably due to a firmware bug.
772 */
773
774 param[0] = 0xa5;
775 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
776 return -1;
777
778 if (param[0] != 0x00 && param[0] != 0x03 &&
779 param[0] != 0x04 && param[0] != 0xff)
780 return -1;
781
782 /*
783 * Then we reset and disable the mouse so that it doesn't generate events.
784 */
785
786 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
787 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
788
789 return 0;
790 }
791
792 /*
793 * Here we set the mouse resolution.
794 */
795
796 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
797 {
798 unsigned char params[] = { 0, 1, 2, 2, 3 };
799
800 if (resolution == 0 || resolution > 200)
801 resolution = 200;
802
803 ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
804 psmouse->resolution = 25 << params[resolution / 50];
805 }
806
807 /*
808 * Here we set the mouse report rate.
809 */
810
811 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
812 {
813 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
814 int i = 0;
815
816 while (rates[i] > rate) i++;
817 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
818 psmouse->rate = rates[i];
819 }
820
821 /*
822 * psmouse_initialize() initializes the mouse to a sane state.
823 */
824
825 static void psmouse_initialize(struct psmouse *psmouse)
826 {
827 /*
828 * We set the mouse into streaming mode.
829 */
830
831 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
832
833 /*
834 * We set the mouse report rate, resolution and scaling.
835 */
836
837 if (psmouse_max_proto != PSMOUSE_PS2) {
838 psmouse->set_rate(psmouse, psmouse->rate);
839 psmouse->set_resolution(psmouse, psmouse->resolution);
840 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
841 }
842 }
843
844 /*
845 * psmouse_activate() enables the mouse so that we get motion reports from it.
846 */
847
848 static void psmouse_activate(struct psmouse *psmouse)
849 {
850 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
851 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
852 psmouse->ps2dev.serio->phys);
853
854 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
855 }
856
857
858 /*
859 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
860 * reports from it unless we explicitely request it.
861 */
862
863 static void psmouse_deactivate(struct psmouse *psmouse)
864 {
865 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
866 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
867 psmouse->ps2dev.serio->phys);
868
869 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
870 }
871
872 /*
873 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
874 */
875
876 static int psmouse_poll(struct psmouse *psmouse)
877 {
878 return ps2_command(&psmouse->ps2dev, psmouse->packet,
879 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
880 }
881
882
883 /*
884 * psmouse_resync() attempts to re-validate current protocol.
885 */
886
887 static void psmouse_resync(void *p)
888 {
889 struct psmouse *psmouse = p, *parent = NULL;
890 struct serio *serio = psmouse->ps2dev.serio;
891 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
892 int failed = 0, enabled = 0;
893 int i;
894
895 mutex_lock(&psmouse_mutex);
896
897 if (psmouse->state != PSMOUSE_RESYNCING)
898 goto out;
899
900 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
901 parent = serio_get_drvdata(serio->parent);
902 psmouse_deactivate(parent);
903 }
904
905 /*
906 * Some mice don't ACK commands sent while they are in the middle of
907 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
908 * instead of ps2_command() which would wait for 200ms for an ACK
909 * that may never come.
910 * As an additional quirk ALPS touchpads may not only forget to ACK
911 * disable command but will stop reporting taps, so if we see that
912 * mouse at least once ACKs disable we will do full reconnect if ACK
913 * is missing.
914 */
915 psmouse->num_resyncs++;
916
917 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
918 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
919 failed = 1;
920 } else
921 psmouse->acks_disable_command = 1;
922
923 /*
924 * Poll the mouse. If it was reset the packet will be shorter than
925 * psmouse->pktsize and ps2_command will fail. We do not expect and
926 * do not handle scenario when mouse "upgrades" its protocol while
927 * disconnected since it would require additional delay. If we ever
928 * see a mouse that does it we'll adjust the code.
929 */
930 if (!failed) {
931 if (psmouse->poll(psmouse))
932 failed = 1;
933 else {
934 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
935 for (i = 0; i < psmouse->pktsize; i++) {
936 psmouse->pktcnt++;
937 rc = psmouse->protocol_handler(psmouse, NULL);
938 if (rc != PSMOUSE_GOOD_DATA)
939 break;
940 }
941 if (rc != PSMOUSE_FULL_PACKET)
942 failed = 1;
943 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
944 }
945 }
946 /*
947 * Now try to enable mouse. We try to do that even if poll failed and also
948 * repeat our attempts 5 times, otherwise we may be left out with disabled
949 * mouse.
950 */
951 for (i = 0; i < 5; i++) {
952 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
953 enabled = 1;
954 break;
955 }
956 msleep(200);
957 }
958
959 if (!enabled) {
960 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
961 psmouse->ps2dev.serio->phys);
962 failed = 1;
963 }
964
965 if (failed) {
966 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
967 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
968 serio_reconnect(serio);
969 } else
970 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
971
972 if (parent)
973 psmouse_activate(parent);
974 out:
975 mutex_unlock(&psmouse_mutex);
976 }
977
978 /*
979 * psmouse_cleanup() resets the mouse into power-on state.
980 */
981
982 static void psmouse_cleanup(struct serio *serio)
983 {
984 struct psmouse *psmouse = serio_get_drvdata(serio);
985
986 psmouse_reset(psmouse);
987 }
988
989 /*
990 * psmouse_disconnect() closes and frees.
991 */
992
993 static void psmouse_disconnect(struct serio *serio)
994 {
995 struct psmouse *psmouse, *parent = NULL;
996
997 psmouse = serio_get_drvdata(serio);
998
999 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1000
1001 mutex_lock(&psmouse_mutex);
1002
1003 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1004
1005 /* make sure we don't have a resync in progress */
1006 mutex_unlock(&psmouse_mutex);
1007 flush_workqueue(kpsmoused_wq);
1008 mutex_lock(&psmouse_mutex);
1009
1010 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1011 parent = serio_get_drvdata(serio->parent);
1012 psmouse_deactivate(parent);
1013 }
1014
1015 if (psmouse->disconnect)
1016 psmouse->disconnect(psmouse);
1017
1018 if (parent && parent->pt_deactivate)
1019 parent->pt_deactivate(parent);
1020
1021 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1022
1023 serio_close(serio);
1024 serio_set_drvdata(serio, NULL);
1025 input_unregister_device(psmouse->dev);
1026 kfree(psmouse);
1027
1028 if (parent)
1029 psmouse_activate(parent);
1030
1031 mutex_unlock(&psmouse_mutex);
1032 }
1033
1034 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
1035 {
1036 struct input_dev *input_dev = psmouse->dev;
1037
1038 input_dev->private = psmouse;
1039 input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1040
1041 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1042 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1043 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1044
1045 psmouse->set_rate = psmouse_set_rate;
1046 psmouse->set_resolution = psmouse_set_resolution;
1047 psmouse->poll = psmouse_poll;
1048 psmouse->protocol_handler = psmouse_process_byte;
1049 psmouse->pktsize = 3;
1050
1051 if (proto && (proto->detect || proto->init)) {
1052 if (proto->detect && proto->detect(psmouse, 1) < 0)
1053 return -1;
1054
1055 if (proto->init && proto->init(psmouse) < 0)
1056 return -1;
1057
1058 psmouse->type = proto->type;
1059 }
1060 else
1061 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1062
1063 /*
1064 * If mouse's packet size is 3 there is no point in polling the
1065 * device in hopes to detect protocol reset - we won't get less
1066 * than 3 bytes response anyhow.
1067 */
1068 if (psmouse->pktsize == 3)
1069 psmouse->resync_time = 0;
1070
1071 /*
1072 * Some smart KVMs fake response to POLL command returning just
1073 * 3 bytes and messing up our resync logic, so if initial poll
1074 * fails we won't try polling the device anymore. Hopefully
1075 * such KVM will maintain initially selected protocol.
1076 */
1077 if (psmouse->resync_time && psmouse->poll(psmouse))
1078 psmouse->resync_time = 0;
1079
1080 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1081 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1082
1083 input_dev->name = psmouse->devname;
1084 input_dev->phys = psmouse->phys;
1085 input_dev->id.bustype = BUS_I8042;
1086 input_dev->id.vendor = 0x0002;
1087 input_dev->id.product = psmouse->type;
1088 input_dev->id.version = psmouse->model;
1089
1090 return 0;
1091 }
1092
1093 /*
1094 * psmouse_connect() is a callback from the serio module when
1095 * an unhandled serio port is found.
1096 */
1097 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1098 {
1099 struct psmouse *psmouse, *parent = NULL;
1100 struct input_dev *input_dev;
1101 int retval = -ENOMEM;
1102
1103 mutex_lock(&psmouse_mutex);
1104
1105 /*
1106 * If this is a pass-through port deactivate parent so the device
1107 * connected to this port can be successfully identified
1108 */
1109 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1110 parent = serio_get_drvdata(serio->parent);
1111 psmouse_deactivate(parent);
1112 }
1113
1114 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1115 input_dev = input_allocate_device();
1116 if (!psmouse || !input_dev)
1117 goto out;
1118
1119 ps2_init(&psmouse->ps2dev, serio);
1120 INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
1121 psmouse->dev = input_dev;
1122 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1123
1124 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1125
1126 serio_set_drvdata(serio, psmouse);
1127
1128 retval = serio_open(serio, drv);
1129 if (retval)
1130 goto out;
1131
1132 if (psmouse_probe(psmouse) < 0) {
1133 serio_close(serio);
1134 retval = -ENODEV;
1135 goto out;
1136 }
1137
1138 psmouse->rate = psmouse_rate;
1139 psmouse->resolution = psmouse_resolution;
1140 psmouse->resetafter = psmouse_resetafter;
1141 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1142 psmouse->smartscroll = psmouse_smartscroll;
1143
1144 psmouse_switch_protocol(psmouse, NULL);
1145
1146 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1147 psmouse_initialize(psmouse);
1148
1149 input_register_device(psmouse->dev);
1150
1151 if (parent && parent->pt_activate)
1152 parent->pt_activate(parent);
1153
1154 sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1155
1156 psmouse_activate(psmouse);
1157
1158 retval = 0;
1159
1160 out:
1161 if (retval) {
1162 serio_set_drvdata(serio, NULL);
1163 input_free_device(input_dev);
1164 kfree(psmouse);
1165 }
1166
1167 /* If this is a pass-through port the parent needs to be re-activated */
1168 if (parent)
1169 psmouse_activate(parent);
1170
1171 mutex_unlock(&psmouse_mutex);
1172 return retval;
1173 }
1174
1175
1176 static int psmouse_reconnect(struct serio *serio)
1177 {
1178 struct psmouse *psmouse = serio_get_drvdata(serio);
1179 struct psmouse *parent = NULL;
1180 struct serio_driver *drv = serio->drv;
1181 int rc = -1;
1182
1183 if (!drv || !psmouse) {
1184 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1185 return -1;
1186 }
1187
1188 mutex_lock(&psmouse_mutex);
1189
1190 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1191 parent = serio_get_drvdata(serio->parent);
1192 psmouse_deactivate(parent);
1193 }
1194
1195 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1196
1197 if (psmouse->reconnect) {
1198 if (psmouse->reconnect(psmouse))
1199 goto out;
1200 } else if (psmouse_probe(psmouse) < 0 ||
1201 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1202 goto out;
1203
1204 /* ok, the device type (and capabilities) match the old one,
1205 * we can continue using it, complete intialization
1206 */
1207 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1208
1209 psmouse_initialize(psmouse);
1210
1211 if (parent && parent->pt_activate)
1212 parent->pt_activate(parent);
1213
1214 psmouse_activate(psmouse);
1215 rc = 0;
1216
1217 out:
1218 /* If this is a pass-through port the parent waits to be activated */
1219 if (parent)
1220 psmouse_activate(parent);
1221
1222 mutex_unlock(&psmouse_mutex);
1223 return rc;
1224 }
1225
1226 static struct serio_device_id psmouse_serio_ids[] = {
1227 {
1228 .type = SERIO_8042,
1229 .proto = SERIO_ANY,
1230 .id = SERIO_ANY,
1231 .extra = SERIO_ANY,
1232 },
1233 {
1234 .type = SERIO_PS_PSTHRU,
1235 .proto = SERIO_ANY,
1236 .id = SERIO_ANY,
1237 .extra = SERIO_ANY,
1238 },
1239 { 0 }
1240 };
1241
1242 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1243
1244 static struct serio_driver psmouse_drv = {
1245 .driver = {
1246 .name = "psmouse",
1247 },
1248 .description = DRIVER_DESC,
1249 .id_table = psmouse_serio_ids,
1250 .interrupt = psmouse_interrupt,
1251 .connect = psmouse_connect,
1252 .reconnect = psmouse_reconnect,
1253 .disconnect = psmouse_disconnect,
1254 .cleanup = psmouse_cleanup,
1255 };
1256
1257 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1258 char *buf)
1259 {
1260 struct serio *serio = to_serio_port(dev);
1261 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1262 struct psmouse *psmouse;
1263 int retval;
1264
1265 retval = serio_pin_driver(serio);
1266 if (retval)
1267 return retval;
1268
1269 if (serio->drv != &psmouse_drv) {
1270 retval = -ENODEV;
1271 goto out;
1272 }
1273
1274 psmouse = serio_get_drvdata(serio);
1275
1276 retval = attr->show(psmouse, attr->data, buf);
1277
1278 out:
1279 serio_unpin_driver(serio);
1280 return retval;
1281 }
1282
1283 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1284 const char *buf, size_t count)
1285 {
1286 struct serio *serio = to_serio_port(dev);
1287 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1288 struct psmouse *psmouse, *parent = NULL;
1289 int retval;
1290
1291 retval = serio_pin_driver(serio);
1292 if (retval)
1293 return retval;
1294
1295 if (serio->drv != &psmouse_drv) {
1296 retval = -ENODEV;
1297 goto out_unpin;
1298 }
1299
1300 retval = mutex_lock_interruptible(&psmouse_mutex);
1301 if (retval)
1302 goto out_unpin;
1303
1304 psmouse = serio_get_drvdata(serio);
1305
1306 if (psmouse->state == PSMOUSE_IGNORE) {
1307 retval = -ENODEV;
1308 goto out_unlock;
1309 }
1310
1311 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1312 parent = serio_get_drvdata(serio->parent);
1313 psmouse_deactivate(parent);
1314 }
1315
1316 psmouse_deactivate(psmouse);
1317
1318 retval = attr->set(psmouse, attr->data, buf, count);
1319
1320 if (retval != -ENODEV)
1321 psmouse_activate(psmouse);
1322
1323 if (parent)
1324 psmouse_activate(parent);
1325
1326 out_unlock:
1327 mutex_unlock(&psmouse_mutex);
1328 out_unpin:
1329 serio_unpin_driver(serio);
1330 return retval;
1331 }
1332
1333 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1334 {
1335 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1336
1337 return sprintf(buf, "%lu\n", *field);
1338 }
1339
1340 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1341 {
1342 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1343 unsigned long value;
1344 char *rest;
1345
1346 value = simple_strtoul(buf, &rest, 10);
1347 if (*rest)
1348 return -EINVAL;
1349
1350 *field = value;
1351
1352 return count;
1353 }
1354
1355 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1356 {
1357 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1358 }
1359
1360 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1361 {
1362 struct serio *serio = psmouse->ps2dev.serio;
1363 struct psmouse *parent = NULL;
1364 struct input_dev *new_dev;
1365 struct psmouse_protocol *proto;
1366 int retry = 0;
1367
1368 if (!(proto = psmouse_protocol_by_name(buf, count)))
1369 return -EINVAL;
1370
1371 if (psmouse->type == proto->type)
1372 return count;
1373
1374 if (!(new_dev = input_allocate_device()))
1375 return -ENOMEM;
1376
1377 while (serio->child) {
1378 if (++retry > 3) {
1379 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1380 input_free_device(new_dev);
1381 return -EIO;
1382 }
1383
1384 mutex_unlock(&psmouse_mutex);
1385 serio_unpin_driver(serio);
1386 serio_unregister_child_port(serio);
1387 serio_pin_driver_uninterruptible(serio);
1388 mutex_lock(&psmouse_mutex);
1389
1390 if (serio->drv != &psmouse_drv) {
1391 input_free_device(new_dev);
1392 return -ENODEV;
1393 }
1394
1395 if (psmouse->type == proto->type) {
1396 input_free_device(new_dev);
1397 return count; /* switched by other thread */
1398 }
1399 }
1400
1401 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1402 parent = serio_get_drvdata(serio->parent);
1403 if (parent->pt_deactivate)
1404 parent->pt_deactivate(parent);
1405 }
1406
1407 if (psmouse->disconnect)
1408 psmouse->disconnect(psmouse);
1409
1410 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1411 input_unregister_device(psmouse->dev);
1412
1413 psmouse->dev = new_dev;
1414 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1415
1416 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1417 psmouse_reset(psmouse);
1418 /* default to PSMOUSE_PS2 */
1419 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1420 }
1421
1422 psmouse_initialize(psmouse);
1423 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1424
1425 input_register_device(psmouse->dev);
1426
1427 if (parent && parent->pt_activate)
1428 parent->pt_activate(parent);
1429
1430 return count;
1431 }
1432
1433 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1434 {
1435 unsigned long value;
1436 char *rest;
1437
1438 value = simple_strtoul(buf, &rest, 10);
1439 if (*rest)
1440 return -EINVAL;
1441
1442 psmouse->set_rate(psmouse, value);
1443 return count;
1444 }
1445
1446 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1447 {
1448 unsigned long value;
1449 char *rest;
1450
1451 value = simple_strtoul(buf, &rest, 10);
1452 if (*rest)
1453 return -EINVAL;
1454
1455 psmouse->set_resolution(psmouse, value);
1456 return count;
1457 }
1458
1459
1460 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1461 {
1462 struct psmouse_protocol *proto;
1463
1464 if (!val)
1465 return -EINVAL;
1466
1467 proto = psmouse_protocol_by_name(val, strlen(val));
1468
1469 if (!proto || !proto->maxproto)
1470 return -EINVAL;
1471
1472 *((unsigned int *)kp->arg) = proto->type;
1473
1474 return 0;
1475 }
1476
1477 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1478 {
1479 int type = *((unsigned int *)kp->arg);
1480
1481 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1482 }
1483
1484 static int __init psmouse_init(void)
1485 {
1486 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1487 if (!kpsmoused_wq) {
1488 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1489 return -ENOMEM;
1490 }
1491
1492 serio_register_driver(&psmouse_drv);
1493
1494 return 0;
1495 }
1496
1497 static void __exit psmouse_exit(void)
1498 {
1499 serio_unregister_driver(&psmouse_drv);
1500 destroy_workqueue(kpsmoused_wq);
1501 }
1502
1503 module_init(psmouse_init);
1504 module_exit(psmouse_exit);
Linux kernel - Deliverables
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