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[deliverable/linux.git] / drivers / input / mouse / psmouse-base.c
CommitLineData
1da177e4
LT		 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 "psmouse.h"
24#include "synaptics.h"
25#include "logips2pp.h"
26#include "alps.h"
02d7f589 27#include "lifebook.h"
1da177e4
LT		 28
29#define DRIVER_DESC "PS/2 mouse driver"
30
31MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
32MODULE_DESCRIPTION(DRIVER_DESC);
33MODULE_LICENSE("GPL");
34
dbf4ccd6 35static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
1da177e4
LT		 36static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
37static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
1da177e4
LT		 38#define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
39#define param_set_proto_abbrev psmouse_set_maxproto
40#define param_get_proto_abbrev psmouse_get_maxproto
41module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
dbf4ccd6 42MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
1da177e4
LT		 43
44static unsigned int psmouse_resolution = 200;
45module_param_named(resolution, psmouse_resolution, uint, 0644);
46MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
47
48static unsigned int psmouse_rate = 100;
49module_param_named(rate, psmouse_rate, uint, 0644);
50MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
51
52static unsigned int psmouse_smartscroll = 1;
53module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
54MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
55
56static unsigned int psmouse_resetafter;
57module_param_named(resetafter, psmouse_resetafter, uint, 0644);
58MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
59
dbf4ccd6 60PSMOUSE_DEFINE_ATTR(protocol);
1da177e4
LT		 61PSMOUSE_DEFINE_ATTR(rate);
62PSMOUSE_DEFINE_ATTR(resolution);
63PSMOUSE_DEFINE_ATTR(resetafter);
64
65__obsolete_setup("psmouse_noext");
66__obsolete_setup("psmouse_resolution=");
67__obsolete_setup("psmouse_smartscroll=");
68__obsolete_setup("psmouse_resetafter=");
69__obsolete_setup("psmouse_rate=");
70
04df1925
DT		 71/*
72 * psmouse_sem protects all operations changing state of mouse
73 * (connecting, disconnecting, changing rate or resolution via
74 * sysfs). We could use a per-device semaphore but since there
75 * rarely more than one PS/2 mouse connected and since semaphore
76 * is taken in "slow" paths it is not worth it.
77 */
78static DECLARE_MUTEX(psmouse_sem);
79
dbf4ccd6
DT		 80struct psmouse_protocol {
81 enum psmouse_type type;
82 char *name;
83 char *alias;
84 int maxproto;
85 int (*detect)(struct psmouse *, int);
86 int (*init)(struct psmouse *);
87};
1da177e4
LT		 88
89/*
90 * psmouse_process_byte() analyzes the PS/2 data stream and reports
91 * relevant events to the input module once full packet has arrived.
92 */
93
94static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
95{
96 struct input_dev *dev = &psmouse->dev;
97 unsigned char *packet = psmouse->packet;
98
99 if (psmouse->pktcnt < psmouse->pktsize)
100 return PSMOUSE_GOOD_DATA;
101
102/*
103 * Full packet accumulated, process it
104 */
105
106 input_regs(dev, regs);
107
108/*
109 * Scroll wheel on IntelliMice, scroll buttons on NetMice
110 */
111
112 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
113 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
114
115/*
116 * Scroll wheel and buttons on IntelliMouse Explorer
117 */
118
119 if (psmouse->type == PSMOUSE_IMEX) {
120 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
121 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
122 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
123 }
124
125/*
126 * Extra buttons on Genius NewNet 3D
127 */
128
129 if (psmouse->type == PSMOUSE_GENPS) {
130 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
131 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
132 }
133
134/*
135 * Extra button on ThinkingMouse
136 */
137 if (psmouse->type == PSMOUSE_THINKPS) {
138 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
139 /* Without this bit of weirdness moving up gives wildly high Y changes. */
140 packet[1] |= (packet[0] & 0x40) << 1;
141 }
142
143/*
144 * Generic PS/2 Mouse
145 */
146
147 input_report_key(dev, BTN_LEFT, packet[0] & 1);
148 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
149 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
150
151 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
152 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
153
154 input_sync(dev);
155
156 return PSMOUSE_FULL_PACKET;
157}
158
159/*
160 * psmouse_interrupt() handles incoming characters, either gathering them into
161 * packets or passing them to the command routine as command output.
162 */
163
164static irqreturn_t psmouse_interrupt(struct serio *serio,
165 unsigned char data, unsigned int flags, struct pt_regs *regs)
166{
167 struct psmouse *psmouse = serio_get_drvdata(serio);
168 psmouse_ret_t rc;
169
170 if (psmouse->state == PSMOUSE_IGNORE)
171 goto out;
172
173 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
174 if (psmouse->state == PSMOUSE_ACTIVATED)
175 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
176 flags & SERIO_TIMEOUT ? " timeout" : "",
177 flags & SERIO_PARITY ? " bad parity" : "");
178 ps2_cmd_aborted(&psmouse->ps2dev);
179 goto out;
180 }
181
182 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
183 if (ps2_handle_ack(&psmouse->ps2dev, data))
184 goto out;
185
186 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
187 if (ps2_handle_response(&psmouse->ps2dev, data))
188 goto out;
189
190 if (psmouse->state == PSMOUSE_INITIALIZING)
191 goto out;
192
193 if (psmouse->state == PSMOUSE_ACTIVATED &&
194 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
195 printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
196 psmouse->name, psmouse->phys, psmouse->pktcnt);
197 psmouse->pktcnt = 0;
198 }
199
200 psmouse->last = jiffies;
201 psmouse->packet[psmouse->pktcnt++] = data;
202
203 if (psmouse->packet[0] == PSMOUSE_RET_BAT) {
204 if (psmouse->pktcnt == 1)
205 goto out;
206
207 if (psmouse->pktcnt == 2) {
208 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
209 psmouse->state = PSMOUSE_IGNORE;
210 serio_reconnect(serio);
211 goto out;
212 }
213 if (psmouse->type == PSMOUSE_SYNAPTICS) {
214 /* neither 0xAA nor 0x00 are valid first bytes
215 * for a packet in absolute mode
216 */
217 psmouse->pktcnt = 0;
218 goto out;
219 }
220 }
221 }
222
223 rc = psmouse->protocol_handler(psmouse, regs);
224
225 switch (rc) {
226 case PSMOUSE_BAD_DATA:
227 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
228 psmouse->name, psmouse->phys, psmouse->pktcnt);
229 psmouse->pktcnt = 0;
230
231 if (++psmouse->out_of_sync == psmouse->resetafter) {
232 psmouse->state = PSMOUSE_IGNORE;
233 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
234 serio_reconnect(psmouse->ps2dev.serio);
235 }
236 break;
237
238 case PSMOUSE_FULL_PACKET:
239 psmouse->pktcnt = 0;
240 if (psmouse->out_of_sync) {
241 psmouse->out_of_sync = 0;
242 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
243 psmouse->name, psmouse->phys);
244 }
245 break;
246
247 case PSMOUSE_GOOD_DATA:
248 break;
249 }
250out:
251 return IRQ_HANDLED;
252}
253
254
255/*
256 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
257 * using sliced syntax, understood by advanced devices, such as Logitech
258 * or Synaptics touchpads. The command is encoded as:
259 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
260 * is the command.
261 */
262int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
263{
264 int i;
265
266 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
267 return -1;
268
269 for (i = 6; i >= 0; i -= 2) {
270 unsigned char d = (command >> i) & 3;
271 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
272 return -1;
273 }
274
275 return 0;
276}
277
278
279/*
280 * psmouse_reset() resets the mouse into power-on state.
281 */
282int psmouse_reset(struct psmouse *psmouse)
283{
284 unsigned char param[2];
285
286 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
287 return -1;
288
289 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
290 return -1;
291
292 return 0;
293}
294
295
296/*
297 * Genius NetMouse magic init.
298 */
299static int genius_detect(struct psmouse *psmouse, int set_properties)
300{
301 struct ps2dev *ps2dev = &psmouse->ps2dev;
302 unsigned char param[4];
303
304 param[0] = 3;
305 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
306 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
307 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
308 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
309 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
310
311 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
312 return -1;
313
314 if (set_properties) {
315 set_bit(BTN_EXTRA, psmouse->dev.keybit);
316 set_bit(BTN_SIDE, psmouse->dev.keybit);
317 set_bit(REL_WHEEL, psmouse->dev.relbit);
318
319 psmouse->vendor = "Genius";
320 psmouse->name = "Wheel Mouse";
321 psmouse->pktsize = 4;
322 }
323
324 return 0;
325}
326
327/*
328 * IntelliMouse magic init.
329 */
330static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
331{
332 struct ps2dev *ps2dev = &psmouse->ps2dev;
333 unsigned char param[2];
334
335 param[0] = 200;
336 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
337 param[0] = 100;
338 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
339 param[0] = 80;
340 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
341 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
342
343 if (param[0] != 3)
344 return -1;
345
346 if (set_properties) {
7b4019d0 347 set_bit(BTN_MIDDLE, psmouse->dev.keybit);
1da177e4
LT		 348 set_bit(REL_WHEEL, psmouse->dev.relbit);
349
350 if (!psmouse->vendor) psmouse->vendor = "Generic";
351 if (!psmouse->name) psmouse->name = "Wheel Mouse";
352 psmouse->pktsize = 4;
353 }
354
355 return 0;
356}
357
358/*
359 * Try IntelliMouse/Explorer magic init.
360 */
361static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
362{
363 struct ps2dev *ps2dev = &psmouse->ps2dev;
364 unsigned char param[2];
365
366 intellimouse_detect(psmouse, 0);
367
368 param[0] = 200;
369 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
370 param[0] = 200;
371 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
372 param[0] = 80;
373 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
374 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
375
376 if (param[0] != 4)
377 return -1;
378
379 if (set_properties) {
7b4019d0 380 set_bit(BTN_MIDDLE, psmouse->dev.keybit);
1da177e4
LT		 381 set_bit(REL_WHEEL, psmouse->dev.relbit);
382 set_bit(BTN_SIDE, psmouse->dev.keybit);
383 set_bit(BTN_EXTRA, psmouse->dev.keybit);
384
385 if (!psmouse->vendor) psmouse->vendor = "Generic";
386 if (!psmouse->name) psmouse->name = "Explorer Mouse";
387 psmouse->pktsize = 4;
388 }
389
390 return 0;
391}
392
393/*
394 * Kensington ThinkingMouse / ExpertMouse magic init.
395 */
396static int thinking_detect(struct psmouse *psmouse, int set_properties)
397{
398 struct ps2dev *ps2dev = &psmouse->ps2dev;
399 unsigned char param[2];
400 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
401 int i;
402
403 param[0] = 10;
404 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
405 param[0] = 0;
406 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
407 for (i = 0; seq[i]; i++)
408 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
409 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
410
411 if (param[0] != 2)
412 return -1;
413
414 if (set_properties) {
415 set_bit(BTN_EXTRA, psmouse->dev.keybit);
416
417 psmouse->vendor = "Kensington";
418 psmouse->name = "ThinkingMouse";
419 }
420
421 return 0;
422}
423
424/*
425 * Bare PS/2 protocol "detection". Always succeeds.
426 */
427static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
428{
dbf4ccd6
DT		 429 if (set_properties) {
430 if (!psmouse->vendor) psmouse->vendor = "Generic";
431 if (!psmouse->name) psmouse->name = "Mouse";
432 }
1da177e4
LT		 433
434 return 0;
435}
436
dbf4ccd6 437
1da177e4
LT		 438/*
439 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
440 * the mouse may have.
441 */
442
443static int psmouse_extensions(struct psmouse *psmouse,
444 unsigned int max_proto, int set_properties)
445{
446 int synaptics_hardware = 0;
447
a15d60f8
DT		 448/*
449 * We always check for lifebook because it does not disturb mouse
450 * (it only checks DMI information).
451 */
dbf4ccd6 452 if (lifebook_detect(psmouse, set_properties) == 0) {
a15d60f8
DT		 453 if (max_proto > PSMOUSE_IMEX) {
454 if (!set_properties || lifebook_init(psmouse) == 0)
455 return PSMOUSE_LIFEBOOK;
456 }
457 }
02d7f589 458
1da177e4
LT		 459/*
460 * Try Kensington ThinkingMouse (we try first, because synaptics probe
461 * upsets the thinkingmouse).
462 */
463
464 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
465 return PSMOUSE_THINKPS;
466
467/*
468 * Try Synaptics TouchPad
469 */
470 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
471 synaptics_hardware = 1;
472
473 if (max_proto > PSMOUSE_IMEX) {
474 if (!set_properties || synaptics_init(psmouse) == 0)
475 return PSMOUSE_SYNAPTICS;
476/*
477 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
478 * Unfortunately Logitech/Genius probes confuse some firmware versions so
479 * we'll have to skip them.
480 */
481 max_proto = PSMOUSE_IMEX;
482 }
483/*
484 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
485 */
486 synaptics_reset(psmouse);
487 }
488
489/*
490 * Try ALPS TouchPad
491 */
492 if (max_proto > PSMOUSE_IMEX) {
493 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
494 if (alps_detect(psmouse, set_properties) == 0) {
495 if (!set_properties || alps_init(psmouse) == 0)
496 return PSMOUSE_ALPS;
497/*
498 * Init failed, try basic relative protocols
499 */
500 max_proto = PSMOUSE_IMEX;
501 }
502 }
503
504 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
505 return PSMOUSE_GENPS;
506
507 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
508 return PSMOUSE_PS2PP;
509
510/*
511 * Reset to defaults in case the device got confused by extended
512 * protocol probes.
513 */
514 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
515
516 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
517 return PSMOUSE_IMEX;
518
519 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
520 return PSMOUSE_IMPS;
521
522/*
523 * Okay, all failed, we have a standard mouse here. The number of the buttons
524 * is still a question, though. We assume 3.
525 */
526 ps2bare_detect(psmouse, set_properties);
527
528 if (synaptics_hardware) {
529/*
530 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
531 * We need to reset the touchpad because if there is a track point on the
532 * pass through port it could get disabled while probing for protocol
533 * extensions.
534 */
535 psmouse_reset(psmouse);
536 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
537 }
538
539 return PSMOUSE_PS2;
540}
541
dbf4ccd6
DT		 542static struct psmouse_protocol psmouse_protocols[] = {
543 {
544 .type = PSMOUSE_PS2,
545 .name = "PS/2",
546 .alias = "bare",
547 .maxproto = 1,
548 .detect = ps2bare_detect,
549 },
550 {
551 .type = PSMOUSE_PS2PP,
552 .name = "PS2++",
553 .alias = "logitech",
554 .detect = ps2pp_init,
555 },
556 {
557 .type = PSMOUSE_THINKPS,
558 .name = "ThinkPS/2",
559 .alias = "thinkps",
560 .detect = thinking_detect,
561 },
562 {
563 .type = PSMOUSE_GENPS,
564 .name = "GenPS/2",
565 .alias = "genius",
566 .detect = genius_detect,
567 },
568 {
569 .type = PSMOUSE_IMPS,
570 .name = "ImPS/2",
571 .alias = "imps",
572 .maxproto = 1,
573 .detect = intellimouse_detect,
574 },
575 {
576 .type = PSMOUSE_IMEX,
577 .name = "ImExPS/2",
578 .alias = "exps",
579 .maxproto = 1,
580 .detect = im_explorer_detect,
581 },
582 {
583 .type = PSMOUSE_SYNAPTICS,
584 .name = "SynPS/2",
585 .alias = "synaptics",
586 .detect = synaptics_detect,
587 .init = synaptics_init,
588 },
589 {
590 .type = PSMOUSE_ALPS,
591 .name = "AlpsPS/2",
592 .alias = "alps",
593 .detect = alps_detect,
594 .init = alps_init,
595 },
596 {
597 .type = PSMOUSE_LIFEBOOK,
598 .name = "LBPS/2",
599 .alias = "lifebook",
600 .init = lifebook_init,
601 },
602 {
603 .type = PSMOUSE_AUTO,
604 .name = "auto",
605 .alias = "any",
606 .maxproto = 1,
607 },
608};
609
610static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
611{
612 int i;
613
614 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
615 if (psmouse_protocols[i].type == type)
616 return &psmouse_protocols[i];
617
618 WARN_ON(1);
619 return &psmouse_protocols[0];
620}
621
622static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
623{
624 struct psmouse_protocol *p;
625 int i;
626
627 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
628 p = &psmouse_protocols[i];
629
630 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
631 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
632 return &psmouse_protocols[i];
633 }
634
635 return NULL;
636}
637
638
1da177e4
LT		 639/*
640 * psmouse_probe() probes for a PS/2 mouse.
641 */
642
643static int psmouse_probe(struct psmouse *psmouse)
644{
645 struct ps2dev *ps2dev = &psmouse->ps2dev;
646 unsigned char param[2];
647
648/*
649 * First, we check if it's a mouse. It should send 0x00 or 0x03
650 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
7741e931
VP		 651 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
652 * ID queries, probably due to a firmware bug.
1da177e4
LT		 653 */
654
655 param[0] = 0xa5;
656 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
657 return -1;
658
7741e931
VP		 659 if (param[0] != 0x00 && param[0] != 0x03 &&
660 param[0] != 0x04 && param[0] != 0xff)
1da177e4
LT		 661 return -1;
662
663/*
664 * Then we reset and disable the mouse so that it doesn't generate events.
665 */
666
667 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
668 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
669
670 return 0;
671}
672
673/*
674 * Here we set the mouse resolution.
675 */
676
677void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
678{
679 unsigned char params[] = { 0, 1, 2, 2, 3 };
680
681 if (resolution == 0 || resolution > 200)
682 resolution = 200;
683
684 ps2_command(&psmouse->ps2dev, &params[resolution / 50], PSMOUSE_CMD_SETRES);
685 psmouse->resolution = 25 << params[resolution / 50];
686}
687
688/*
689 * Here we set the mouse report rate.
690 */
691
692static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
693{
694 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
695 int i = 0;
696
697 while (rates[i] > rate) i++;
698 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
699 psmouse->rate = rates[i];
700}
701
702/*
703 * psmouse_initialize() initializes the mouse to a sane state.
704 */
705
706static void psmouse_initialize(struct psmouse *psmouse)
707{
708/*
709 * We set the mouse into streaming mode.
710 */
711
712 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
713
714/*
715 * We set the mouse report rate, resolution and scaling.
716 */
717
718 if (psmouse_max_proto != PSMOUSE_PS2) {
719 psmouse->set_rate(psmouse, psmouse->rate);
720 psmouse->set_resolution(psmouse, psmouse->resolution);
721 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
722 }
723}
724
725/*
726 * psmouse_set_state() sets new psmouse state and resets all flags and
727 * counters while holding serio lock so fighting with interrupt handler
728 * is not a concern.
729 */
730
731static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
732{
733 serio_pause_rx(psmouse->ps2dev.serio);
734 psmouse->state = new_state;
735 psmouse->pktcnt = psmouse->out_of_sync = 0;
736 psmouse->ps2dev.flags = 0;
737 serio_continue_rx(psmouse->ps2dev.serio);
738}
739
740/*
741 * psmouse_activate() enables the mouse so that we get motion reports from it.
742 */
743
744static void psmouse_activate(struct psmouse *psmouse)
745{
746 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
747 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
748 psmouse->ps2dev.serio->phys);
749
750 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
751}
752
753
754/*
755 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
756 * reports from it unless we explicitely request it.
757 */
758
759static void psmouse_deactivate(struct psmouse *psmouse)
760{
761 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
762 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
763 psmouse->ps2dev.serio->phys);
764
765 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
766}
767
768
769/*
770 * psmouse_cleanup() resets the mouse into power-on state.
771 */
772
773static void psmouse_cleanup(struct serio *serio)
774{
775 struct psmouse *psmouse = serio_get_drvdata(serio);
776
777 psmouse_reset(psmouse);
778}
779
780/*
781 * psmouse_disconnect() closes and frees.
782 */
783
784static void psmouse_disconnect(struct serio *serio)
785{
04df1925
DT		 786 struct psmouse *psmouse, *parent = NULL;
787
788 psmouse = serio_get_drvdata(serio);
1da177e4 789
dbf4ccd6 790 device_remove_file(&serio->dev, &psmouse_attr_protocol);
1da177e4
LT		 791 device_remove_file(&serio->dev, &psmouse_attr_rate);
792 device_remove_file(&serio->dev, &psmouse_attr_resolution);
793 device_remove_file(&serio->dev, &psmouse_attr_resetafter);
794
04df1925
DT		 795 down(&psmouse_sem);
796
1da177e4
LT		 797 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
798
799 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
800 parent = serio_get_drvdata(serio->parent);
04df1925 801 psmouse_deactivate(parent);
1da177e4
LT		 802 }
803
804 if (psmouse->disconnect)
805 psmouse->disconnect(psmouse);
806
04df1925
DT		 807 if (parent && parent->pt_deactivate)
808 parent->pt_deactivate(parent);
809
1da177e4
LT		 810 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
811
812 input_unregister_device(&psmouse->dev);
813 serio_close(serio);
814 serio_set_drvdata(serio, NULL);
815 kfree(psmouse);
04df1925
DT		 816
817 if (parent)
818 psmouse_activate(parent);
819
820 up(&psmouse_sem);
1da177e4
LT		 821}
822
dbf4ccd6
DT		 823static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
824{
825 memset(&psmouse->dev, 0, sizeof(struct input_dev));
826
827 init_input_dev(&psmouse->dev);
828
829 psmouse->dev.private = psmouse;
830 psmouse->dev.dev = &psmouse->ps2dev.serio->dev;
831
832 psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
833 psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
834 psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
835
836 psmouse->set_rate = psmouse_set_rate;
837 psmouse->set_resolution = psmouse_set_resolution;
838 psmouse->protocol_handler = psmouse_process_byte;
839 psmouse->pktsize = 3;
840
841 if (proto && (proto->detect || proto->init)) {
842 if (proto->detect && proto->detect(psmouse, 1) < 0)
843 return -1;
844
845 if (proto->init && proto->init(psmouse) < 0)
846 return -1;
847
848 psmouse->type = proto->type;
849 }
850 else
851 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
852
853 sprintf(psmouse->devname, "%s %s %s",
854 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
855
856 psmouse->dev.name = psmouse->devname;
857 psmouse->dev.phys = psmouse->phys;
858 psmouse->dev.id.bustype = BUS_I8042;
859 psmouse->dev.id.vendor = 0x0002;
860 psmouse->dev.id.product = psmouse->type;
861 psmouse->dev.id.version = psmouse->model;
862
863 return 0;
864}
865
1da177e4
LT		 866/*
867 * psmouse_connect() is a callback from the serio module when
868 * an unhandled serio port is found.
869 */
870static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
871{
872 struct psmouse *psmouse, *parent = NULL;
873 int retval;
874
04df1925
DT		 875 down(&psmouse_sem);
876
1da177e4
LT		 877 /*
878 * If this is a pass-through port deactivate parent so the device
879 * connected to this port can be successfully identified
880 */
881 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
882 parent = serio_get_drvdata(serio->parent);
883 psmouse_deactivate(parent);
884 }
885
04df1925 886 if (!(psmouse = kcalloc(1, sizeof(struct psmouse), GFP_KERNEL))) {
1da177e4
LT		 887 retval = -ENOMEM;
888 goto out;
889 }
890
1da177e4
LT		 891 ps2_init(&psmouse->ps2dev, serio);
892 sprintf(psmouse->phys, "%s/input0", serio->phys);
dbf4ccd6 893
1da177e4
LT		 894 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
895
896 serio_set_drvdata(serio, psmouse);
897
898 retval = serio_open(serio, drv);
899 if (retval) {
900 serio_set_drvdata(serio, NULL);
901 kfree(psmouse);
902 goto out;
903 }
904
905 if (psmouse_probe(psmouse) < 0) {
906 serio_close(serio);
907 serio_set_drvdata(serio, NULL);
908 kfree(psmouse);
909 retval = -ENODEV;
910 goto out;
911 }
912
913 psmouse->rate = psmouse_rate;
914 psmouse->resolution = psmouse_resolution;
915 psmouse->resetafter = psmouse_resetafter;
916 psmouse->smartscroll = psmouse_smartscroll;
1da177e4 917
dbf4ccd6 918 psmouse_switch_protocol(psmouse, NULL);
1da177e4
LT		 919
920 input_register_device(&psmouse->dev);
1da177e4
LT		 921 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);
922
923 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
924
925 psmouse_initialize(psmouse);
926
927 if (parent && parent->pt_activate)
928 parent->pt_activate(parent);
929
dbf4ccd6 930 device_create_file(&serio->dev, &psmouse_attr_protocol);
1da177e4
LT		 931 device_create_file(&serio->dev, &psmouse_attr_rate);
932 device_create_file(&serio->dev, &psmouse_attr_resolution);
933 device_create_file(&serio->dev, &psmouse_attr_resetafter);
934
935 psmouse_activate(psmouse);
936
937 retval = 0;
938
939out:
04df1925 940 /* If this is a pass-through port the parent needs to be re-activated */
1da177e4
LT		 941 if (parent)
942 psmouse_activate(parent);
943
04df1925 944 up(&psmouse_sem);
1da177e4
LT		 945 return retval;
946}
947
948
949static int psmouse_reconnect(struct serio *serio)
950{
951 struct psmouse *psmouse = serio_get_drvdata(serio);
952 struct psmouse *parent = NULL;
953 struct serio_driver *drv = serio->drv;
954 int rc = -1;
955
956 if (!drv || !psmouse) {
957 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
958 return -1;
959 }
960
04df1925
DT		 961 down(&psmouse_sem);
962
1da177e4
LT		 963 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
964 parent = serio_get_drvdata(serio->parent);
965 psmouse_deactivate(parent);
966 }
967
968 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
969
970 if (psmouse->reconnect) {
971 if (psmouse->reconnect(psmouse))
972 goto out;
973 } else if (psmouse_probe(psmouse) < 0 ||
974 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
975 goto out;
976
977 /* ok, the device type (and capabilities) match the old one,
978 * we can continue using it, complete intialization
979 */
980 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
981
982 psmouse_initialize(psmouse);
983
984 if (parent && parent->pt_activate)
985 parent->pt_activate(parent);
986
987 psmouse_activate(psmouse);
988 rc = 0;
989
990out:
991 /* If this is a pass-through port the parent waits to be activated */
992 if (parent)
993 psmouse_activate(parent);
994
04df1925 995 up(&psmouse_sem);
1da177e4
LT		 996 return rc;
997}
998
999static struct serio_device_id psmouse_serio_ids[] = {
1000 {
1001 .type = SERIO_8042,
1002 .proto = SERIO_ANY,
1003 .id = SERIO_ANY,
1004 .extra = SERIO_ANY,
1005 },
1006 {
1007 .type = SERIO_PS_PSTHRU,
1008 .proto = SERIO_ANY,
1009 .id = SERIO_ANY,
1010 .extra = SERIO_ANY,
1011 },
1012 { 0 }
1013};
1014
1015MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1016
1017static struct serio_driver psmouse_drv = {
1018 .driver = {
1019 .name = "psmouse",
1020 },
1021 .description = DRIVER_DESC,
1022 .id_table = psmouse_serio_ids,
1023 .interrupt = psmouse_interrupt,
1024 .connect = psmouse_connect,
1025 .reconnect = psmouse_reconnect,
1026 .disconnect = psmouse_disconnect,
1027 .cleanup = psmouse_cleanup,
1028};
1029
1030ssize_t psmouse_attr_show_helper(struct device *dev, char *buf,
1031 ssize_t (*handler)(struct psmouse *, char *))
1032{
1033 struct serio *serio = to_serio_port(dev);
1034 int retval;
1035
1036 retval = serio_pin_driver(serio);
1037 if (retval)
1038 return retval;
1039
1040 if (serio->drv != &psmouse_drv) {
1041 retval = -ENODEV;
1042 goto out;
1043 }
1044
1045 retval = handler(serio_get_drvdata(serio), buf);
1046
1047out:
1048 serio_unpin_driver(serio);
1049 return retval;
1050}
1051
1052ssize_t psmouse_attr_set_helper(struct device *dev, const char *buf, size_t count,
1053 ssize_t (*handler)(struct psmouse *, const char *, size_t))
1054{
1055 struct serio *serio = to_serio_port(dev);
1056 struct psmouse *psmouse = serio_get_drvdata(serio);
1057 struct psmouse *parent = NULL;
1058 int retval;
1059
1060 retval = serio_pin_driver(serio);
1061 if (retval)
1062 return retval;
1063
1064 if (serio->drv != &psmouse_drv) {
1065 retval = -ENODEV;
04df1925
DT		 1066 goto out_unpin;
1067 }
1068
1069 retval = down_interruptible(&psmouse_sem);
1070 if (retval)
1071 goto out_unpin;
1072
1073 if (psmouse->state == PSMOUSE_IGNORE) {
1074 retval = -ENODEV;
1075 goto out_up;
1da177e4
LT		 1076 }
1077
1078 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1079 parent = serio_get_drvdata(serio->parent);
1080 psmouse_deactivate(parent);
1081 }
dbf4ccd6 1082
1da177e4
LT		 1083 psmouse_deactivate(psmouse);
1084
1085 retval = handler(psmouse, buf, count);
1086
dbf4ccd6
DT		 1087 if (retval != -ENODEV)
1088 psmouse_activate(psmouse);
1089
1da177e4
LT		 1090 if (parent)
1091 psmouse_activate(parent);
1092
04df1925
DT		 1093 out_up:
1094 up(&psmouse_sem);
1095 out_unpin:
1da177e4
LT		 1096 serio_unpin_driver(serio);
1097 return retval;
1098}
1099
dbf4ccd6
DT		 1100static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, char *buf)
1101{
1102 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1103}
1104
1105static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, const char *buf, size_t count)
1106{
1107 struct serio *serio = psmouse->ps2dev.serio;
1108 struct psmouse *parent = NULL;
1109 struct psmouse_protocol *proto;
1110 int retry = 0;
1111
1112 if (!(proto = psmouse_protocol_by_name(buf, count)))
1113 return -EINVAL;
1114
1115 if (psmouse->type == proto->type)
1116 return count;
1117
1118 while (serio->child) {
1119 if (++retry > 3) {
1120 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1121 return -EIO;
1122 }
1123
1124 up(&psmouse_sem);
1125 serio_unpin_driver(serio);
1126 serio_unregister_child_port(serio);
1127 serio_pin_driver_uninterruptible(serio);
1128 down(&psmouse_sem);
1129
1130 if (serio->drv != &psmouse_drv)
1131 return -ENODEV;
1132
1133 if (psmouse->type == proto->type)
1134 return count; /* switched by other thread */
1135 }
1136
1137 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1138 parent = serio_get_drvdata(serio->parent);
1139 if (parent->pt_deactivate)
1140 parent->pt_deactivate(parent);
1141 }
1142
1143 if (psmouse->disconnect)
1144 psmouse->disconnect(psmouse);
1145
1146 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1147 input_unregister_device(&psmouse->dev);
1148
1149 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1150
1151 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1152 psmouse_reset(psmouse);
1153 /* default to PSMOUSE_PS2 */
1154 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1155 }
1156
1157 psmouse_initialize(psmouse);
1158 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1159
1160 input_register_device(&psmouse->dev);
1161 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);
1162
1163 if (parent && parent->pt_activate)
1164 parent->pt_activate(parent);
1165
1166 return count;
1167}
1168
1da177e4
LT		 1169static ssize_t psmouse_attr_show_rate(struct psmouse *psmouse, char *buf)
1170{
1171 return sprintf(buf, "%d\n", psmouse->rate);
1172}
1173
1174static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, const char *buf, size_t count)
1175{
1176 unsigned long value;
1177 char *rest;
1178
1179 value = simple_strtoul(buf, &rest, 10);
1180 if (*rest)
1181 return -EINVAL;
1182
1183 psmouse->set_rate(psmouse, value);
1184 return count;
1185}
1186
1187static ssize_t psmouse_attr_show_resolution(struct psmouse *psmouse, char *buf)
1188{
1189 return sprintf(buf, "%d\n", psmouse->resolution);
1190}
1191
1192static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, const char *buf, size_t count)
1193{
1194 unsigned long value;
1195 char *rest;
1196
1197 value = simple_strtoul(buf, &rest, 10);
1198 if (*rest)
1199 return -EINVAL;
1200
1201 psmouse->set_resolution(psmouse, value);
1202 return count;
1203}
1204
1205static ssize_t psmouse_attr_show_resetafter(struct psmouse *psmouse, char *buf)
1206{
1207 return sprintf(buf, "%d\n", psmouse->resetafter);
1208}
1209
1210static ssize_t psmouse_attr_set_resetafter(struct psmouse *psmouse, const char *buf, size_t count)
1211{
1212 unsigned long value;
1213 char *rest;
1214
1215 value = simple_strtoul(buf, &rest, 10);
1216 if (*rest)
1217 return -EINVAL;
1218
1219 psmouse->resetafter = value;
1220 return count;
1221}
1222
1223static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1224{
dbf4ccd6 1225 struct psmouse_protocol *proto;
1da177e4
LT		 1226
1227 if (!val)
1228 return -EINVAL;
1229
dbf4ccd6 1230 proto = psmouse_protocol_by_name(val, strlen(val));
1da177e4 1231
dbf4ccd6
DT		 1232 if (!proto || !proto->maxproto)
1233 return -EINVAL;
1da177e4 1234
dbf4ccd6 1235 *((unsigned int *)kp->arg) = proto->type;
1da177e4 1236
dbf4ccd6 1237 return 0; \
1da177e4
LT		 1238}
1239
1240static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1241{
dbf4ccd6
DT		 1242 int type = *((unsigned int *)kp->arg);
1243
1244 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1da177e4
LT		 1245}
1246
1247static int __init psmouse_init(void)
1248{
1249 serio_register_driver(&psmouse_drv);
1250 return 0;
1251}
1252
1253static void __exit psmouse_exit(void)
1254{
1255 serio_unregister_driver(&psmouse_drv);
1256}
1257
1258module_init(psmouse_init);
1259module_exit(psmouse_exit);
Linux kernel - Deliverables
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