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Input: psmouse - fix new device detection logic
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / input / mouse / psmouse-base.c
blob136321a2cfdb57b9211972fc4e2240e7ce86697e
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 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
154 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
155 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
156 }
157
158 /*
159 * Extra buttons on Genius NewNet 3D
160 */
161
162 if (psmouse->type == PSMOUSE_GENPS) {
163 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
164 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
165 }
166
167 /*
168 * Extra button on ThinkingMouse
169 */
170 if (psmouse->type == PSMOUSE_THINKPS) {
171 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
172 /* Without this bit of weirdness moving up gives wildly high Y changes. */
173 packet[1] |= (packet[0] & 0x40) << 1;
174 }
175
176 /*
177 * Generic PS/2 Mouse
178 */
179
180 input_report_key(dev, BTN_LEFT, packet[0] & 1);
181 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
182 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
183
184 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
185 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
186
187 input_sync(dev);
188
189 return PSMOUSE_FULL_PACKET;
190 }
191
192 /*
193 * __psmouse_set_state() sets new psmouse state and resets all flags.
194 */
195
196 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
197 {
198 psmouse->state = new_state;
199 psmouse->pktcnt = psmouse->out_of_sync = 0;
200 psmouse->ps2dev.flags = 0;
201 psmouse->last = jiffies;
202 }
203
204
205 /*
206 * psmouse_set_state() sets new psmouse state and resets all flags and
207 * counters while holding serio lock so fighting with interrupt handler
208 * is not a concern.
209 */
210
211 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
212 {
213 serio_pause_rx(psmouse->ps2dev.serio);
214 __psmouse_set_state(psmouse, new_state);
215 serio_continue_rx(psmouse->ps2dev.serio);
216 }
217
218 /*
219 * psmouse_handle_byte() processes one byte of the input data stream
220 * by calling corresponding protocol handler.
221 */
222
223 static int psmouse_handle_byte(struct psmouse *psmouse, struct pt_regs *regs)
224 {
225 psmouse_ret_t rc = psmouse->protocol_handler(psmouse, regs);
226
227 switch (rc) {
228 case PSMOUSE_BAD_DATA:
229 if (psmouse->state == PSMOUSE_ACTIVATED) {
230 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
231 psmouse->name, psmouse->phys, psmouse->pktcnt);
232 if (++psmouse->out_of_sync == psmouse->resetafter) {
233 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
234 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
235 serio_reconnect(psmouse->ps2dev.serio);
236 return -1;
237 }
238 }
239 psmouse->pktcnt = 0;
240 break;
241
242 case PSMOUSE_FULL_PACKET:
243 psmouse->pktcnt = 0;
244 if (psmouse->out_of_sync) {
245 psmouse->out_of_sync = 0;
246 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
247 psmouse->name, psmouse->phys);
248 }
249 break;
250
251 case PSMOUSE_GOOD_DATA:
252 break;
253 }
254 return 0;
255 }
256
257 /*
258 * psmouse_interrupt() handles incoming characters, either passing them
259 * for normal processing or gathering them as command response.
260 */
261
262 static irqreturn_t psmouse_interrupt(struct serio *serio,
263 unsigned char data, unsigned int flags, struct pt_regs *regs)
264 {
265 struct psmouse *psmouse = serio_get_drvdata(serio);
266
267 if (psmouse->state == PSMOUSE_IGNORE)
268 goto out;
269
270 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
271 if (psmouse->state == PSMOUSE_ACTIVATED)
272 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
273 flags & SERIO_TIMEOUT ? " timeout" : "",
274 flags & SERIO_PARITY ? " bad parity" : "");
275 ps2_cmd_aborted(&psmouse->ps2dev);
276 goto out;
277 }
278
279 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
280 if (ps2_handle_ack(&psmouse->ps2dev, data))
281 goto out;
282
283 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
284 if (ps2_handle_response(&psmouse->ps2dev, data))
285 goto out;
286
287 if (psmouse->state <= PSMOUSE_RESYNCING)
288 goto out;
289
290 if (psmouse->state == PSMOUSE_ACTIVATED &&
291 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
292 printk(KERN_INFO "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
293 psmouse->name, psmouse->phys, psmouse->pktcnt);
294 psmouse->badbyte = psmouse->packet[0];
295 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
296 queue_work(kpsmoused_wq, &psmouse->resync_work);
297 goto out;
298 }
299
300 psmouse->packet[psmouse->pktcnt++] = data;
301 /*
302 * Check if this is a new device announcement (0xAA 0x00)
303 */
304 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
305 if (psmouse->pktcnt == 1) {
306 psmouse->last = jiffies;
307 goto out;
308 }
309
310 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
311 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
312 serio_reconnect(serio);
313 goto out;
314 }
315 /*
316 * Not a new device, try processing first byte normally
317 */
318 psmouse->pktcnt = 1;
319 if (psmouse_handle_byte(psmouse, regs))
320 goto out;
321
322 psmouse->packet[psmouse->pktcnt++] = data;
323 }
324
325 /*
326 * See if we need to force resync because mouse was idle for too long
327 */
328 if (psmouse->state == PSMOUSE_ACTIVATED &&
329 psmouse->pktcnt == 1 && psmouse->resync_time &&
330 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
331 psmouse->badbyte = psmouse->packet[0];
332 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
333 queue_work(kpsmoused_wq, &psmouse->resync_work);
334 goto out;
335 }
336
337 psmouse->last = jiffies;
338 psmouse_handle_byte(psmouse, regs);
339
340 out:
341 return IRQ_HANDLED;
342 }
343
344
345 /*
346 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
347 * using sliced syntax, understood by advanced devices, such as Logitech
348 * or Synaptics touchpads. The command is encoded as:
349 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
350 * is the command.
351 */
352 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
353 {
354 int i;
355
356 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
357 return -1;
358
359 for (i = 6; i >= 0; i -= 2) {
360 unsigned char d = (command >> i) & 3;
361 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
362 return -1;
363 }
364
365 return 0;
366 }
367
368
369 /*
370 * psmouse_reset() resets the mouse into power-on state.
371 */
372 int psmouse_reset(struct psmouse *psmouse)
373 {
374 unsigned char param[2];
375
376 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
377 return -1;
378
379 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
380 return -1;
381
382 return 0;
383 }
384
385
386 /*
387 * Genius NetMouse magic init.
388 */
389 static int genius_detect(struct psmouse *psmouse, int set_properties)
390 {
391 struct ps2dev *ps2dev = &psmouse->ps2dev;
392 unsigned char param[4];
393
394 param[0] = 3;
395 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
396 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
397 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
398 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
399 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
400
401 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
402 return -1;
403
404 if (set_properties) {
405 set_bit(BTN_EXTRA, psmouse->dev->keybit);
406 set_bit(BTN_SIDE, psmouse->dev->keybit);
407 set_bit(REL_WHEEL, psmouse->dev->relbit);
408
409 psmouse->vendor = "Genius";
410 psmouse->name = "Mouse";
411 psmouse->pktsize = 4;
412 }
413
414 return 0;
415 }
416
417 /*
418 * IntelliMouse magic init.
419 */
420 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
421 {
422 struct ps2dev *ps2dev = &psmouse->ps2dev;
423 unsigned char param[2];
424
425 param[0] = 200;
426 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
427 param[0] = 100;
428 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
429 param[0] = 80;
430 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
431 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
432
433 if (param[0] != 3)
434 return -1;
435
436 if (set_properties) {
437 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
438 set_bit(REL_WHEEL, psmouse->dev->relbit);
439
440 if (!psmouse->vendor) psmouse->vendor = "Generic";
441 if (!psmouse->name) psmouse->name = "Wheel Mouse";
442 psmouse->pktsize = 4;
443 }
444
445 return 0;
446 }
447
448 /*
449 * Try IntelliMouse/Explorer magic init.
450 */
451 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
452 {
453 struct ps2dev *ps2dev = &psmouse->ps2dev;
454 unsigned char param[2];
455
456 intellimouse_detect(psmouse, 0);
457
458 param[0] = 200;
459 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
460 param[0] = 200;
461 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
462 param[0] = 80;
463 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
464 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
465
466 if (param[0] != 4)
467 return -1;
468
469 if (set_properties) {
470 set_bit(BTN_MIDDLE, psmouse->dev->keybit);
471 set_bit(REL_WHEEL, psmouse->dev->relbit);
472 set_bit(BTN_SIDE, psmouse->dev->keybit);
473 set_bit(BTN_EXTRA, psmouse->dev->keybit);
474
475 if (!psmouse->vendor) psmouse->vendor = "Generic";
476 if (!psmouse->name) psmouse->name = "Explorer Mouse";
477 psmouse->pktsize = 4;
478 }
479
480 return 0;
481 }
482
483 /*
484 * Kensington ThinkingMouse / ExpertMouse magic init.
485 */
486 static int thinking_detect(struct psmouse *psmouse, int set_properties)
487 {
488 struct ps2dev *ps2dev = &psmouse->ps2dev;
489 unsigned char param[2];
490 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
491 int i;
492
493 param[0] = 10;
494 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
495 param[0] = 0;
496 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
497 for (i = 0; seq[i]; i++)
498 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
499 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
500
501 if (param[0] != 2)
502 return -1;
503
504 if (set_properties) {
505 set_bit(BTN_EXTRA, psmouse->dev->keybit);
506
507 psmouse->vendor = "Kensington";
508 psmouse->name = "ThinkingMouse";
509 }
510
511 return 0;
512 }
513
514 /*
515 * Bare PS/2 protocol "detection". Always succeeds.
516 */
517 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
518 {
519 if (set_properties) {
520 if (!psmouse->vendor) psmouse->vendor = "Generic";
521 if (!psmouse->name) psmouse->name = "Mouse";
522 }
523
524 return 0;
525 }
526
527
528 /*
529 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
530 * the mouse may have.
531 */
532
533 static int psmouse_extensions(struct psmouse *psmouse,
534 unsigned int max_proto, int set_properties)
535 {
536 int synaptics_hardware = 0;
537
538 /*
539 * We always check for lifebook because it does not disturb mouse
540 * (it only checks DMI information).
541 */
542 if (lifebook_detect(psmouse, set_properties) == 0) {
543 if (max_proto > PSMOUSE_IMEX) {
544 if (!set_properties || lifebook_init(psmouse) == 0)
545 return PSMOUSE_LIFEBOOK;
546 }
547 }
548
549 /*
550 * Try Kensington ThinkingMouse (we try first, because synaptics probe
551 * upsets the thinkingmouse).
552 */
553
554 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
555 return PSMOUSE_THINKPS;
556
557 /*
558 * Try Synaptics TouchPad
559 */
560 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
561 synaptics_hardware = 1;
562
563 if (max_proto > PSMOUSE_IMEX) {
564 if (!set_properties || synaptics_init(psmouse) == 0)
565 return PSMOUSE_SYNAPTICS;
566 /*
567 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
568 * Unfortunately Logitech/Genius probes confuse some firmware versions so
569 * we'll have to skip them.
570 */
571 max_proto = PSMOUSE_IMEX;
572 }
573 /*
574 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
575 */
576 synaptics_reset(psmouse);
577 }
578
579 /*
580 * Try ALPS TouchPad
581 */
582 if (max_proto > PSMOUSE_IMEX) {
583 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
584 if (alps_detect(psmouse, set_properties) == 0) {
585 if (!set_properties || alps_init(psmouse) == 0)
586 return PSMOUSE_ALPS;
587 /*
588 * Init failed, try basic relative protocols
589 */
590 max_proto = PSMOUSE_IMEX;
591 }
592 }
593
594 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
595 return PSMOUSE_GENPS;
596
597 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
598 return PSMOUSE_PS2PP;
599
600 if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
601 return PSMOUSE_TRACKPOINT;
602
603 /*
604 * Reset to defaults in case the device got confused by extended
605 * protocol probes. Note that we do full reset becuase some mice
606 * put themselves to sleep when see PSMOUSE_RESET_DIS.
607 */
608 psmouse_reset(psmouse);
609
610 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
611 return PSMOUSE_IMEX;
612
613 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
614 return PSMOUSE_IMPS;
615
616 /*
617 * Okay, all failed, we have a standard mouse here. The number of the buttons
618 * is still a question, though. We assume 3.
619 */
620 ps2bare_detect(psmouse, set_properties);
621
622 if (synaptics_hardware) {
623 /*
624 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
625 * We need to reset the touchpad because if there is a track point on the
626 * pass through port it could get disabled while probing for protocol
627 * extensions.
628 */
629 psmouse_reset(psmouse);
630 }
631
632 return PSMOUSE_PS2;
633 }
634
635 static struct psmouse_protocol psmouse_protocols[] = {
636 {
637 .type = PSMOUSE_PS2,
638 .name = "PS/2",
639 .alias = "bare",
640 .maxproto = 1,
641 .detect = ps2bare_detect,
642 },
643 {
644 .type = PSMOUSE_PS2PP,
645 .name = "PS2++",
646 .alias = "logitech",
647 .detect = ps2pp_init,
648 },
649 {
650 .type = PSMOUSE_THINKPS,
651 .name = "ThinkPS/2",
652 .alias = "thinkps",
653 .detect = thinking_detect,
654 },
655 {
656 .type = PSMOUSE_GENPS,
657 .name = "GenPS/2",
658 .alias = "genius",
659 .detect = genius_detect,
660 },
661 {
662 .type = PSMOUSE_IMPS,
663 .name = "ImPS/2",
664 .alias = "imps",
665 .maxproto = 1,
666 .detect = intellimouse_detect,
667 },
668 {
669 .type = PSMOUSE_IMEX,
670 .name = "ImExPS/2",
671 .alias = "exps",
672 .maxproto = 1,
673 .detect = im_explorer_detect,
674 },
675 {
676 .type = PSMOUSE_SYNAPTICS,
677 .name = "SynPS/2",
678 .alias = "synaptics",
679 .detect = synaptics_detect,
680 .init = synaptics_init,
681 },
682 {
683 .type = PSMOUSE_ALPS,
684 .name = "AlpsPS/2",
685 .alias = "alps",
686 .detect = alps_detect,
687 .init = alps_init,
688 },
689 {
690 .type = PSMOUSE_LIFEBOOK,
691 .name = "LBPS/2",
692 .alias = "lifebook",
693 .init = lifebook_init,
694 },
695 {
696 .type = PSMOUSE_TRACKPOINT,
697 .name = "TPPS/2",
698 .alias = "trackpoint",
699 .detect = trackpoint_detect,
700 },
701 {
702 .type = PSMOUSE_AUTO,
703 .name = "auto",
704 .alias = "any",
705 .maxproto = 1,
706 },
707 };
708
709 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
710 {
711 int i;
712
713 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
714 if (psmouse_protocols[i].type == type)
715 return &psmouse_protocols[i];
716
717 WARN_ON(1);
718 return &psmouse_protocols[0];
719 }
720
721 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
722 {
723 struct psmouse_protocol *p;
724 int i;
725
726 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
727 p = &psmouse_protocols[i];
728
729 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
730 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
731 return &psmouse_protocols[i];
732 }
733
734 return NULL;
735 }
736
737
738 /*
739 * psmouse_probe() probes for a PS/2 mouse.
740 */
741
742 static int psmouse_probe(struct psmouse *psmouse)
743 {
744 struct ps2dev *ps2dev = &psmouse->ps2dev;
745 unsigned char param[2];
746
747 /*
748 * First, we check if it's a mouse. It should send 0x00 or 0x03
749 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
750 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
751 * ID queries, probably due to a firmware bug.
752 */
753
754 param[0] = 0xa5;
755 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
756 return -1;
757
758 if (param[0] != 0x00 && param[0] != 0x03 &&
759 param[0] != 0x04 && param[0] != 0xff)
760 return -1;
761
762 /*
763 * Then we reset and disable the mouse so that it doesn't generate events.
764 */
765
766 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
767 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
768
769 return 0;
770 }
771
772 /*
773 * Here we set the mouse resolution.
774 */
775
776 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
777 {
778 unsigned char params[] = { 0, 1, 2, 2, 3 };
779
780 if (resolution == 0 || resolution > 200)
781 resolution = 200;
782
783 ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
784 psmouse->resolution = 25 << params[resolution / 50];
785 }
786
787 /*
788 * Here we set the mouse report rate.
789 */
790
791 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
792 {
793 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
794 int i = 0;
795
796 while (rates[i] > rate) i++;
797 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
798 psmouse->rate = rates[i];
799 }
800
801 /*
802 * psmouse_initialize() initializes the mouse to a sane state.
803 */
804
805 static void psmouse_initialize(struct psmouse *psmouse)
806 {
807 /*
808 * We set the mouse into streaming mode.
809 */
810
811 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
812
813 /*
814 * We set the mouse report rate, resolution and scaling.
815 */
816
817 if (psmouse_max_proto != PSMOUSE_PS2) {
818 psmouse->set_rate(psmouse, psmouse->rate);
819 psmouse->set_resolution(psmouse, psmouse->resolution);
820 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
821 }
822 }
823
824 /*
825 * psmouse_activate() enables the mouse so that we get motion reports from it.
826 */
827
828 static void psmouse_activate(struct psmouse *psmouse)
829 {
830 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
831 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
832 psmouse->ps2dev.serio->phys);
833
834 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
835 }
836
837
838 /*
839 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
840 * reports from it unless we explicitely request it.
841 */
842
843 static void psmouse_deactivate(struct psmouse *psmouse)
844 {
845 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
846 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
847 psmouse->ps2dev.serio->phys);
848
849 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
850 }
851
852 /*
853 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
854 */
855
856 static int psmouse_poll(struct psmouse *psmouse)
857 {
858 return ps2_command(&psmouse->ps2dev, psmouse->packet,
859 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
860 }
861
862
863 /*
864 * psmouse_resync() attempts to re-validate current protocol.
865 */
866
867 static void psmouse_resync(void *p)
868 {
869 struct psmouse *psmouse = p, *parent = NULL;
870 struct serio *serio = psmouse->ps2dev.serio;
871 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
872 int failed = 0, enabled = 0;
873 int i;
874
875 mutex_lock(&psmouse_mutex);
876
877 if (psmouse->state != PSMOUSE_RESYNCING)
878 goto out;
879
880 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
881 parent = serio_get_drvdata(serio->parent);
882 psmouse_deactivate(parent);
883 }
884
885 /*
886 * Some mice don't ACK commands sent while they are in the middle of
887 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
888 * instead of ps2_command() which would wait for 200ms for an ACK
889 * that may never come.
890 * As an additional quirk ALPS touchpads may not only forget to ACK
891 * disable command but will stop reporting taps, so if we see that
892 * mouse at least once ACKs disable we will do full reconnect if ACK
893 * is missing.
894 */
895 psmouse->num_resyncs++;
896
897 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
898 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
899 failed = 1;
900 } else
901 psmouse->acks_disable_command = 1;
902
903 /*
904 * Poll the mouse. If it was reset the packet will be shorter than
905 * psmouse->pktsize and ps2_command will fail. We do not expect and
906 * do not handle scenario when mouse "upgrades" its protocol while
907 * disconnected since it would require additional delay. If we ever
908 * see a mouse that does it we'll adjust the code.
909 */
910 if (!failed) {
911 if (psmouse->poll(psmouse))
912 failed = 1;
913 else {
914 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
915 for (i = 0; i < psmouse->pktsize; i++) {
916 psmouse->pktcnt++;
917 rc = psmouse->protocol_handler(psmouse, NULL);
918 if (rc != PSMOUSE_GOOD_DATA)
919 break;
920 }
921 if (rc != PSMOUSE_FULL_PACKET)
922 failed = 1;
923 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
924 }
925 }
926 /*
927 * Now try to enable mouse. We try to do that even if poll failed and also
928 * repeat our attempts 5 times, otherwise we may be left out with disabled
929 * mouse.
930 */
931 for (i = 0; i < 5; i++) {
932 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
933 enabled = 1;
934 break;
935 }
936 msleep(200);
937 }
938
939 if (!enabled) {
940 printk(KERN_WARNING "psmouse.c: failed to re-enable mouse on %s\n",
941 psmouse->ps2dev.serio->phys);
942 failed = 1;
943 }
944
945 if (failed) {
946 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
947 printk(KERN_INFO "psmouse.c: resync failed, issuing reconnect request\n");
948 serio_reconnect(serio);
949 } else
950 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
951
952 if (parent)
953 psmouse_activate(parent);
954 out:
955 mutex_unlock(&psmouse_mutex);
956 }
957
958 /*
959 * psmouse_cleanup() resets the mouse into power-on state.
960 */
961
962 static void psmouse_cleanup(struct serio *serio)
963 {
964 struct psmouse *psmouse = serio_get_drvdata(serio);
965
966 psmouse_reset(psmouse);
967 }
968
969 /*
970 * psmouse_disconnect() closes and frees.
971 */
972
973 static void psmouse_disconnect(struct serio *serio)
974 {
975 struct psmouse *psmouse, *parent = NULL;
976
977 psmouse = serio_get_drvdata(serio);
978
979 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
980
981 mutex_lock(&psmouse_mutex);
982
983 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
984
985 /* make sure we don't have a resync in progress */
986 mutex_unlock(&psmouse_mutex);
987 flush_workqueue(kpsmoused_wq);
988 mutex_lock(&psmouse_mutex);
989
990 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
991 parent = serio_get_drvdata(serio->parent);
992 psmouse_deactivate(parent);
993 }
994
995 if (psmouse->disconnect)
996 psmouse->disconnect(psmouse);
997
998 if (parent && parent->pt_deactivate)
999 parent->pt_deactivate(parent);
1000
1001 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1002
1003 serio_close(serio);
1004 serio_set_drvdata(serio, NULL);
1005 input_unregister_device(psmouse->dev);
1006 kfree(psmouse);
1007
1008 if (parent)
1009 psmouse_activate(parent);
1010
1011 mutex_unlock(&psmouse_mutex);
1012 }
1013
1014 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
1015 {
1016 struct input_dev *input_dev = psmouse->dev;
1017
1018 input_dev->private = psmouse;
1019 input_dev->cdev.dev = &psmouse->ps2dev.serio->dev;
1020
1021 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
1022 input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
1023 input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
1024
1025 psmouse->set_rate = psmouse_set_rate;
1026 psmouse->set_resolution = psmouse_set_resolution;
1027 psmouse->poll = psmouse_poll;
1028 psmouse->protocol_handler = psmouse_process_byte;
1029 psmouse->pktsize = 3;
1030
1031 if (proto && (proto->detect || proto->init)) {
1032 if (proto->detect && proto->detect(psmouse, 1) < 0)
1033 return -1;
1034
1035 if (proto->init && proto->init(psmouse) < 0)
1036 return -1;
1037
1038 psmouse->type = proto->type;
1039 }
1040 else
1041 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
1042
1043 /*
1044 * If mouse's packet size is 3 there is no point in polling the
1045 * device in hopes to detect protocol reset - we won't get less
1046 * than 3 bytes response anyhow.
1047 */
1048 if (psmouse->pktsize == 3)
1049 psmouse->resync_time = 0;
1050
1051 /*
1052 * Some smart KVMs fake response to POLL command returning just
1053 * 3 bytes and messing up our resync logic, so if initial poll
1054 * fails we won't try polling the device anymore. Hopefully
1055 * such KVM will maintain initially selected protocol.
1056 */
1057 if (psmouse->resync_time && psmouse->poll(psmouse))
1058 psmouse->resync_time = 0;
1059
1060 sprintf(psmouse->devname, "%s %s %s",
1061 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
1062
1063 input_dev->name = psmouse->devname;
1064 input_dev->phys = psmouse->phys;
1065 input_dev->id.bustype = BUS_I8042;
1066 input_dev->id.vendor = 0x0002;
1067 input_dev->id.product = psmouse->type;
1068 input_dev->id.version = psmouse->model;
1069
1070 return 0;
1071 }
1072
1073 /*
1074 * psmouse_connect() is a callback from the serio module when
1075 * an unhandled serio port is found.
1076 */
1077 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1078 {
1079 struct psmouse *psmouse, *parent = NULL;
1080 struct input_dev *input_dev;
1081 int retval = -ENOMEM;
1082
1083 mutex_lock(&psmouse_mutex);
1084
1085 /*
1086 * If this is a pass-through port deactivate parent so the device
1087 * connected to this port can be successfully identified
1088 */
1089 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1090 parent = serio_get_drvdata(serio->parent);
1091 psmouse_deactivate(parent);
1092 }
1093
1094 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1095 input_dev = input_allocate_device();
1096 if (!psmouse || !input_dev)
1097 goto out;
1098
1099 ps2_init(&psmouse->ps2dev, serio);
1100 INIT_WORK(&psmouse->resync_work, psmouse_resync, psmouse);
1101 psmouse->dev = input_dev;
1102 sprintf(psmouse->phys, "%s/input0", serio->phys);
1103
1104 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1105
1106 serio_set_drvdata(serio, psmouse);
1107
1108 retval = serio_open(serio, drv);
1109 if (retval)
1110 goto out;
1111
1112 if (psmouse_probe(psmouse) < 0) {
1113 serio_close(serio);
1114 retval = -ENODEV;
1115 goto out;
1116 }
1117
1118 psmouse->rate = psmouse_rate;
1119 psmouse->resolution = psmouse_resolution;
1120 psmouse->resetafter = psmouse_resetafter;
1121 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1122 psmouse->smartscroll = psmouse_smartscroll;
1123
1124 psmouse_switch_protocol(psmouse, NULL);
1125
1126 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1127 psmouse_initialize(psmouse);
1128
1129 input_register_device(psmouse->dev);
1130
1131 if (parent && parent->pt_activate)
1132 parent->pt_activate(parent);
1133
1134 sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1135
1136 psmouse_activate(psmouse);
1137
1138 retval = 0;
1139
1140 out:
1141 if (retval) {
1142 serio_set_drvdata(serio, NULL);
1143 input_free_device(input_dev);
1144 kfree(psmouse);
1145 }
1146
1147 /* If this is a pass-through port the parent needs to be re-activated */
1148 if (parent)
1149 psmouse_activate(parent);
1150
1151 mutex_unlock(&psmouse_mutex);
1152 return retval;
1153 }
1154
1155
1156 static int psmouse_reconnect(struct serio *serio)
1157 {
1158 struct psmouse *psmouse = serio_get_drvdata(serio);
1159 struct psmouse *parent = NULL;
1160 struct serio_driver *drv = serio->drv;
1161 int rc = -1;
1162
1163 if (!drv || !psmouse) {
1164 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1165 return -1;
1166 }
1167
1168 mutex_lock(&psmouse_mutex);
1169
1170 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1171 parent = serio_get_drvdata(serio->parent);
1172 psmouse_deactivate(parent);
1173 }
1174
1175 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1176
1177 if (psmouse->reconnect) {
1178 if (psmouse->reconnect(psmouse))
1179 goto out;
1180 } else if (psmouse_probe(psmouse) < 0 ||
1181 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1182 goto out;
1183
1184 /* ok, the device type (and capabilities) match the old one,
1185 * we can continue using it, complete intialization
1186 */
1187 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1188
1189 psmouse_initialize(psmouse);
1190
1191 if (parent && parent->pt_activate)
1192 parent->pt_activate(parent);
1193
1194 psmouse_activate(psmouse);
1195 rc = 0;
1196
1197 out:
1198 /* If this is a pass-through port the parent waits to be activated */
1199 if (parent)
1200 psmouse_activate(parent);
1201
1202 mutex_unlock(&psmouse_mutex);
1203 return rc;
1204 }
1205
1206 static struct serio_device_id psmouse_serio_ids[] = {
1207 {
1208 .type = SERIO_8042,
1209 .proto = SERIO_ANY,
1210 .id = SERIO_ANY,
1211 .extra = SERIO_ANY,
1212 },
1213 {
1214 .type = SERIO_PS_PSTHRU,
1215 .proto = SERIO_ANY,
1216 .id = SERIO_ANY,
1217 .extra = SERIO_ANY,
1218 },
1219 { 0 }
1220 };
1221
1222 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1223
1224 static struct serio_driver psmouse_drv = {
1225 .driver = {
1226 .name = "psmouse",
1227 },
1228 .description = DRIVER_DESC,
1229 .id_table = psmouse_serio_ids,
1230 .interrupt = psmouse_interrupt,
1231 .connect = psmouse_connect,
1232 .reconnect = psmouse_reconnect,
1233 .disconnect = psmouse_disconnect,
1234 .cleanup = psmouse_cleanup,
1235 };
1236
1237 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1238 char *buf)
1239 {
1240 struct serio *serio = to_serio_port(dev);
1241 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1242 struct psmouse *psmouse;
1243 int retval;
1244
1245 retval = serio_pin_driver(serio);
1246 if (retval)
1247 return retval;
1248
1249 if (serio->drv != &psmouse_drv) {
1250 retval = -ENODEV;
1251 goto out;
1252 }
1253
1254 psmouse = serio_get_drvdata(serio);
1255
1256 retval = attr->show(psmouse, attr->data, buf);
1257
1258 out:
1259 serio_unpin_driver(serio);
1260 return retval;
1261 }
1262
1263 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1264 const char *buf, size_t count)
1265 {
1266 struct serio *serio = to_serio_port(dev);
1267 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1268 struct psmouse *psmouse, *parent = NULL;
1269 int retval;
1270
1271 retval = serio_pin_driver(serio);
1272 if (retval)
1273 return retval;
1274
1275 if (serio->drv != &psmouse_drv) {
1276 retval = -ENODEV;
1277 goto out_unpin;
1278 }
1279
1280 retval = mutex_lock_interruptible(&psmouse_mutex);
1281 if (retval)
1282 goto out_unpin;
1283
1284 psmouse = serio_get_drvdata(serio);
1285
1286 if (psmouse->state == PSMOUSE_IGNORE) {
1287 retval = -ENODEV;
1288 goto out_unlock;
1289 }
1290
1291 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1292 parent = serio_get_drvdata(serio->parent);
1293 psmouse_deactivate(parent);
1294 }
1295
1296 psmouse_deactivate(psmouse);
1297
1298 retval = attr->set(psmouse, attr->data, buf, count);
1299
1300 if (retval != -ENODEV)
1301 psmouse_activate(psmouse);
1302
1303 if (parent)
1304 psmouse_activate(parent);
1305
1306 out_unlock:
1307 mutex_unlock(&psmouse_mutex);
1308 out_unpin:
1309 serio_unpin_driver(serio);
1310 return retval;
1311 }
1312
1313 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1314 {
1315 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1316
1317 return sprintf(buf, "%lu\n", *field);
1318 }
1319
1320 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1321 {
1322 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1323 unsigned long value;
1324 char *rest;
1325
1326 value = simple_strtoul(buf, &rest, 10);
1327 if (*rest)
1328 return -EINVAL;
1329
1330 *field = value;
1331
1332 return count;
1333 }
1334
1335 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1336 {
1337 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1338 }
1339
1340 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1341 {
1342 struct serio *serio = psmouse->ps2dev.serio;
1343 struct psmouse *parent = NULL;
1344 struct input_dev *new_dev;
1345 struct psmouse_protocol *proto;
1346 int retry = 0;
1347
1348 if (!(proto = psmouse_protocol_by_name(buf, count)))
1349 return -EINVAL;
1350
1351 if (psmouse->type == proto->type)
1352 return count;
1353
1354 if (!(new_dev = input_allocate_device()))
1355 return -ENOMEM;
1356
1357 while (serio->child) {
1358 if (++retry > 3) {
1359 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1360 input_free_device(new_dev);
1361 return -EIO;
1362 }
1363
1364 mutex_unlock(&psmouse_mutex);
1365 serio_unpin_driver(serio);
1366 serio_unregister_child_port(serio);
1367 serio_pin_driver_uninterruptible(serio);
1368 mutex_lock(&psmouse_mutex);
1369
1370 if (serio->drv != &psmouse_drv) {
1371 input_free_device(new_dev);
1372 return -ENODEV;
1373 }
1374
1375 if (psmouse->type == proto->type) {
1376 input_free_device(new_dev);
1377 return count; /* switched by other thread */
1378 }
1379 }
1380
1381 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1382 parent = serio_get_drvdata(serio->parent);
1383 if (parent->pt_deactivate)
1384 parent->pt_deactivate(parent);
1385 }
1386
1387 if (psmouse->disconnect)
1388 psmouse->disconnect(psmouse);
1389
1390 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1391 input_unregister_device(psmouse->dev);
1392
1393 psmouse->dev = new_dev;
1394 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1395
1396 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1397 psmouse_reset(psmouse);
1398 /* default to PSMOUSE_PS2 */
1399 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1400 }
1401
1402 psmouse_initialize(psmouse);
1403 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1404
1405 input_register_device(psmouse->dev);
1406
1407 if (parent && parent->pt_activate)
1408 parent->pt_activate(parent);
1409
1410 return count;
1411 }
1412
1413 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1414 {
1415 unsigned long value;
1416 char *rest;
1417
1418 value = simple_strtoul(buf, &rest, 10);
1419 if (*rest)
1420 return -EINVAL;
1421
1422 psmouse->set_rate(psmouse, value);
1423 return count;
1424 }
1425
1426 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1427 {
1428 unsigned long value;
1429 char *rest;
1430
1431 value = simple_strtoul(buf, &rest, 10);
1432 if (*rest)
1433 return -EINVAL;
1434
1435 psmouse->set_resolution(psmouse, value);
1436 return count;
1437 }
1438
1439
1440 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1441 {
1442 struct psmouse_protocol *proto;
1443
1444 if (!val)
1445 return -EINVAL;
1446
1447 proto = psmouse_protocol_by_name(val, strlen(val));
1448
1449 if (!proto || !proto->maxproto)
1450 return -EINVAL;
1451
1452 *((unsigned int *)kp->arg) = proto->type;
1453
1454 return 0;
1455 }
1456
1457 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1458 {
1459 int type = *((unsigned int *)kp->arg);
1460
1461 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1462 }
1463
1464 static int __init psmouse_init(void)
1465 {
1466 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1467 if (!kpsmoused_wq) {
1468 printk(KERN_ERR "psmouse: failed to create kpsmoused workqueue\n");
1469 return -ENOMEM;
1470 }
1471
1472 serio_register_driver(&psmouse_drv);
1473
1474 return 0;
1475 }
1476
1477 static void __exit psmouse_exit(void)
1478 {
1479 serio_unregister_driver(&psmouse_drv);
1480 destroy_workqueue(kpsmoused_wq);
1481 }
1482
1483 module_init(psmouse_init);
1484 module_exit(psmouse_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree