4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
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.
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>
26 #include "synaptics.h"
27 #include "logips2pp.h"
30 #include "trackpoint.h"
32 #define DRIVER_DESC "PS/2 mouse driver"
34 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
35 MODULE_DESCRIPTION(DRIVER_DESC
);
36 MODULE_LICENSE("GPL");
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.");
47 static unsigned int psmouse_resolution
= 200;
48 module_param_named(resolution
, psmouse_resolution
, uint
, 0644);
49 MODULE_PARM_DESC(resolution
, "Resolution, in dpi.");
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.");
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.");
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).");
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).");
67 PSMOUSE_DEFINE_ATTR(protocol
, S_IWUSR
| S_IRUGO
,
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
);
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
,
92 static struct attribute_group psmouse_attribute_group
= {
93 .attrs
= psmouse_attributes
,
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=");
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.
109 static DEFINE_MUTEX(psmouse_mutex
);
111 static struct workqueue_struct
*kpsmoused_wq
;
113 struct psmouse_protocol
{
114 enum psmouse_type type
;
118 int (*detect
)(struct psmouse
*, int);
119 int (*init
)(struct psmouse
*);
123 * psmouse_process_byte() analyzes the PS/2 data stream and reports
124 * relevant events to the input module once full packet has arrived.
127 static psmouse_ret_t
psmouse_process_byte(struct psmouse
*psmouse
, struct pt_regs
*regs
)
129 struct input_dev
*dev
= psmouse
->dev
;
130 unsigned char *packet
= psmouse
->packet
;
132 if (psmouse
->pktcnt
< psmouse
->pktsize
)
133 return PSMOUSE_GOOD_DATA
;
136 * Full packet accumulated, process it
139 input_regs(dev
, regs
);
142 * Scroll wheel on IntelliMice, scroll buttons on NetMice
145 if (psmouse
->type
== PSMOUSE_IMPS
|| psmouse
->type
== PSMOUSE_GENPS
)
146 input_report_rel(dev
, REL_WHEEL
, -(signed char) packet
[3]);
149 * Scroll wheel and buttons on IntelliMouse Explorer
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));
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));
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);
170 * Extra buttons on Genius NewNet 3D
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);
179 * Extra button on ThinkingMouse
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;
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);
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);
200 return PSMOUSE_FULL_PACKET
;
204 * __psmouse_set_state() sets new psmouse state and resets all flags.
207 static inline void __psmouse_set_state(struct psmouse
*psmouse
, enum psmouse_state new_state
)
209 psmouse
->state
= new_state
;
210 psmouse
->pktcnt
= psmouse
->out_of_sync
= 0;
211 psmouse
->ps2dev
.flags
= 0;
212 psmouse
->last
= jiffies
;
217 * psmouse_set_state() sets new psmouse state and resets all flags and
218 * counters while holding serio lock so fighting with interrupt handler
222 static void psmouse_set_state(struct psmouse
*psmouse
, enum psmouse_state new_state
)
224 serio_pause_rx(psmouse
->ps2dev
.serio
);
225 __psmouse_set_state(psmouse
, new_state
);
226 serio_continue_rx(psmouse
->ps2dev
.serio
);
230 * psmouse_handle_byte() processes one byte of the input data stream
231 * by calling corresponding protocol handler.
234 static int psmouse_handle_byte(struct psmouse
*psmouse
, struct pt_regs
*regs
)
236 psmouse_ret_t rc
= psmouse
->protocol_handler(psmouse
, regs
);
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
);
253 case PSMOUSE_FULL_PACKET
:
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
);
262 case PSMOUSE_GOOD_DATA
:
269 * psmouse_interrupt() handles incoming characters, either passing them
270 * for normal processing or gathering them as command response.
273 static irqreturn_t
psmouse_interrupt(struct serio
*serio
,
274 unsigned char data
, unsigned int flags
, struct pt_regs
*regs
)
276 struct psmouse
*psmouse
= serio_get_drvdata(serio
);
278 if (psmouse
->state
== PSMOUSE_IGNORE
)
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
);
290 if (unlikely(psmouse
->ps2dev
.flags
& PS2_FLAG_ACK
))
291 if (ps2_handle_ack(&psmouse
->ps2dev
, data
))
294 if (unlikely(psmouse
->ps2dev
.flags
& PS2_FLAG_CMD
))
295 if (ps2_handle_response(&psmouse
->ps2dev
, data
))
298 if (psmouse
->state
<= PSMOUSE_RESYNCING
)
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
);
311 psmouse
->packet
[psmouse
->pktcnt
++] = data
;
313 * Check if this is a new device announcement (0xAA 0x00)
315 if (unlikely(psmouse
->packet
[0] == PSMOUSE_RET_BAT
&& psmouse
->pktcnt
<= 2)) {
316 if (psmouse
->pktcnt
== 1) {
317 psmouse
->last
= jiffies
;
321 if (psmouse
->packet
[1] == PSMOUSE_RET_ID
) {
322 __psmouse_set_state(psmouse
, PSMOUSE_IGNORE
);
323 serio_reconnect(serio
);
327 * Not a new device, try processing first byte normally
330 if (psmouse_handle_byte(psmouse
, regs
))
333 psmouse
->packet
[psmouse
->pktcnt
++] = data
;
337 * See if we need to force resync because mouse was idle for too long
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
);
348 psmouse
->last
= jiffies
;
349 psmouse_handle_byte(psmouse
, regs
);
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
363 int psmouse_sliced_command(struct psmouse
*psmouse
, unsigned char command
)
367 if (ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
))
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
))
381 * psmouse_reset() resets the mouse into power-on state.
383 int psmouse_reset(struct psmouse
*psmouse
)
385 unsigned char param
[2];
387 if (ps2_command(&psmouse
->ps2dev
, param
, PSMOUSE_CMD_RESET_BAT
))
390 if (param
[0] != PSMOUSE_RET_BAT
&& param
[1] != PSMOUSE_RET_ID
)
398 * Genius NetMouse magic init.
400 static int genius_detect(struct psmouse
*psmouse
, int set_properties
)
402 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
403 unsigned char param
[4];
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
);
412 if (param
[0] != 0x00 || param
[1] != 0x33 || param
[2] != 0x55)
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
);
420 psmouse
->vendor
= "Genius";
421 psmouse
->name
= "Mouse";
422 psmouse
->pktsize
= 4;
429 * IntelliMouse magic init.
431 static int intellimouse_detect(struct psmouse
*psmouse
, int set_properties
)
433 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
434 unsigned char param
[2];
437 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
439 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
441 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
442 ps2_command(ps2dev
, param
, PSMOUSE_CMD_GETID
);
447 if (set_properties
) {
448 set_bit(BTN_MIDDLE
, psmouse
->dev
->keybit
);
449 set_bit(REL_WHEEL
, psmouse
->dev
->relbit
);
451 if (!psmouse
->vendor
) psmouse
->vendor
= "Generic";
452 if (!psmouse
->name
) psmouse
->name
= "Wheel Mouse";
453 psmouse
->pktsize
= 4;
460 * Try IntelliMouse/Explorer magic init.
462 static int im_explorer_detect(struct psmouse
*psmouse
, int set_properties
)
464 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
465 unsigned char param
[2];
467 intellimouse_detect(psmouse
, 0);
470 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
472 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
474 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
475 ps2_command(ps2dev
, param
, PSMOUSE_CMD_GETID
);
480 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
482 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
484 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
486 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
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
);
495 if (!psmouse
->vendor
) psmouse
->vendor
= "Generic";
496 if (!psmouse
->name
) psmouse
->name
= "Explorer Mouse";
497 psmouse
->pktsize
= 4;
504 * Kensington ThinkingMouse / ExpertMouse magic init.
506 static int thinking_detect(struct psmouse
*psmouse
, int set_properties
)
508 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
509 unsigned char param
[2];
510 static const unsigned char seq
[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
514 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
516 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRES
);
517 for (i
= 0; i
< ARRAY_SIZE(seq
); i
++) {
519 ps2_command(ps2dev
, param
, PSMOUSE_CMD_SETRATE
);
521 ps2_command(ps2dev
, param
, PSMOUSE_CMD_GETID
);
526 if (set_properties
) {
527 set_bit(BTN_EXTRA
, psmouse
->dev
->keybit
);
529 psmouse
->vendor
= "Kensington";
530 psmouse
->name
= "ThinkingMouse";
537 * Bare PS/2 protocol "detection". Always succeeds.
539 static int ps2bare_detect(struct psmouse
*psmouse
, int set_properties
)
541 if (set_properties
) {
542 if (!psmouse
->vendor
) psmouse
->vendor
= "Generic";
543 if (!psmouse
->name
) psmouse
->name
= "Mouse";
551 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
552 * the mouse may have.
555 static int psmouse_extensions(struct psmouse
*psmouse
,
556 unsigned int max_proto
, int set_properties
)
558 int synaptics_hardware
= 0;
561 * We always check for lifebook because it does not disturb mouse
562 * (it only checks DMI information).
564 if (lifebook_detect(psmouse
, set_properties
) == 0) {
565 if (max_proto
> PSMOUSE_IMEX
) {
566 if (!set_properties
|| lifebook_init(psmouse
) == 0)
567 return PSMOUSE_LIFEBOOK
;
572 * Try Kensington ThinkingMouse (we try first, because synaptics probe
573 * upsets the thinkingmouse).
576 if (max_proto
> PSMOUSE_IMEX
&& thinking_detect(psmouse
, set_properties
) == 0)
577 return PSMOUSE_THINKPS
;
580 * Try Synaptics TouchPad
582 if (max_proto
> PSMOUSE_PS2
&& synaptics_detect(psmouse
, set_properties
) == 0) {
583 synaptics_hardware
= 1;
585 if (max_proto
> PSMOUSE_IMEX
) {
586 if (!set_properties
|| synaptics_init(psmouse
) == 0)
587 return PSMOUSE_SYNAPTICS
;
589 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
590 * Unfortunately Logitech/Genius probes confuse some firmware versions so
591 * we'll have to skip them.
593 max_proto
= PSMOUSE_IMEX
;
596 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
598 synaptics_reset(psmouse
);
604 if (max_proto
> PSMOUSE_IMEX
) {
605 ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_RESET_DIS
);
606 if (alps_detect(psmouse
, set_properties
) == 0) {
607 if (!set_properties
|| alps_init(psmouse
) == 0)
610 * Init failed, try basic relative protocols
612 max_proto
= PSMOUSE_IMEX
;
616 if (max_proto
> PSMOUSE_IMEX
&& genius_detect(psmouse
, set_properties
) == 0)
617 return PSMOUSE_GENPS
;
619 if (max_proto
> PSMOUSE_IMEX
&& ps2pp_init(psmouse
, set_properties
) == 0)
620 return PSMOUSE_PS2PP
;
622 if (max_proto
> PSMOUSE_IMEX
&& trackpoint_detect(psmouse
, set_properties
) == 0)
623 return PSMOUSE_TRACKPOINT
;
626 * Reset to defaults in case the device got confused by extended
627 * protocol probes. Note that we do full reset becuase some mice
628 * put themselves to sleep when see PSMOUSE_RESET_DIS.
630 psmouse_reset(psmouse
);
632 if (max_proto
>= PSMOUSE_IMEX
&& im_explorer_detect(psmouse
, set_properties
) == 0)
635 if (max_proto
>= PSMOUSE_IMPS
&& intellimouse_detect(psmouse
, set_properties
) == 0)
639 * Okay, all failed, we have a standard mouse here. The number of the buttons
640 * is still a question, though. We assume 3.
642 ps2bare_detect(psmouse
, set_properties
);
644 if (synaptics_hardware
) {
646 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
647 * We need to reset the touchpad because if there is a track point on the
648 * pass through port it could get disabled while probing for protocol
651 psmouse_reset(psmouse
);
657 static const struct psmouse_protocol psmouse_protocols
[] = {
663 .detect
= ps2bare_detect
,
666 .type
= PSMOUSE_PS2PP
,
669 .detect
= ps2pp_init
,
672 .type
= PSMOUSE_THINKPS
,
675 .detect
= thinking_detect
,
678 .type
= PSMOUSE_GENPS
,
681 .detect
= genius_detect
,
684 .type
= PSMOUSE_IMPS
,
688 .detect
= intellimouse_detect
,
691 .type
= PSMOUSE_IMEX
,
695 .detect
= im_explorer_detect
,
698 .type
= PSMOUSE_SYNAPTICS
,
700 .alias
= "synaptics",
701 .detect
= synaptics_detect
,
702 .init
= synaptics_init
,
705 .type
= PSMOUSE_ALPS
,
708 .detect
= alps_detect
,
712 .type
= PSMOUSE_LIFEBOOK
,
715 .init
= lifebook_init
,
718 .type
= PSMOUSE_TRACKPOINT
,
720 .alias
= "trackpoint",
721 .detect
= trackpoint_detect
,
724 .type
= PSMOUSE_AUTO
,
731 static const struct psmouse_protocol
*psmouse_protocol_by_type(enum psmouse_type type
)
735 for (i
= 0; i
< ARRAY_SIZE(psmouse_protocols
); i
++)
736 if (psmouse_protocols
[i
].type
== type
)
737 return &psmouse_protocols
[i
];
740 return &psmouse_protocols
[0];
743 static const struct psmouse_protocol
*psmouse_protocol_by_name(const char *name
, size_t len
)
745 const struct psmouse_protocol
*p
;
748 for (i
= 0; i
< ARRAY_SIZE(psmouse_protocols
); i
++) {
749 p
= &psmouse_protocols
[i
];
751 if ((strlen(p
->name
) == len
&& !strncmp(p
->name
, name
, len
)) ||
752 (strlen(p
->alias
) == len
&& !strncmp(p
->alias
, name
, len
)))
753 return &psmouse_protocols
[i
];
761 * psmouse_probe() probes for a PS/2 mouse.
764 static int psmouse_probe(struct psmouse
*psmouse
)
766 struct ps2dev
*ps2dev
= &psmouse
->ps2dev
;
767 unsigned char param
[2];
770 * First, we check if it's a mouse. It should send 0x00 or 0x03
771 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
772 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
773 * ID queries, probably due to a firmware bug.
777 if (ps2_command(ps2dev
, param
, PSMOUSE_CMD_GETID
))
780 if (param
[0] != 0x00 && param
[0] != 0x03 &&
781 param
[0] != 0x04 && param
[0] != 0xff)
785 * Then we reset and disable the mouse so that it doesn't generate events.
788 if (ps2_command(ps2dev
, NULL
, PSMOUSE_CMD_RESET_DIS
))
789 printk(KERN_WARNING
"psmouse.c: Failed to reset mouse on %s\n", ps2dev
->serio
->phys
);
795 * Here we set the mouse resolution.
798 void psmouse_set_resolution(struct psmouse
*psmouse
, unsigned int resolution
)
800 static const unsigned char params
[] = { 0, 1, 2, 2, 3 };
803 if (resolution
== 0 || resolution
> 200)
806 p
= params
[resolution
/ 50];
807 ps2_command(&psmouse
->ps2dev
, &p
, PSMOUSE_CMD_SETRES
);
808 psmouse
->resolution
= 25 << p
;
812 * Here we set the mouse report rate.
815 static void psmouse_set_rate(struct psmouse
*psmouse
, unsigned int rate
)
817 static const unsigned char rates
[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
821 while (rates
[i
] > rate
) i
++;
823 ps2_command(&psmouse
->ps2dev
, &r
, PSMOUSE_CMD_SETRATE
);
828 * psmouse_initialize() initializes the mouse to a sane state.
831 static void psmouse_initialize(struct psmouse
*psmouse
)
834 * We set the mouse into streaming mode.
837 ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_SETSTREAM
);
840 * We set the mouse report rate, resolution and scaling.
843 if (psmouse_max_proto
!= PSMOUSE_PS2
) {
844 psmouse
->set_rate(psmouse
, psmouse
->rate
);
845 psmouse
->set_resolution(psmouse
, psmouse
->resolution
);
846 ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_SETSCALE11
);
851 * psmouse_activate() enables the mouse so that we get motion reports from it.
854 static void psmouse_activate(struct psmouse
*psmouse
)
856 if (ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_ENABLE
))
857 printk(KERN_WARNING
"psmouse.c: Failed to enable mouse on %s\n",
858 psmouse
->ps2dev
.serio
->phys
);
860 psmouse_set_state(psmouse
, PSMOUSE_ACTIVATED
);
865 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
866 * reports from it unless we explicitely request it.
869 static void psmouse_deactivate(struct psmouse
*psmouse
)
871 if (ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_DISABLE
))
872 printk(KERN_WARNING
"psmouse.c: Failed to deactivate mouse on %s\n",
873 psmouse
->ps2dev
.serio
->phys
);
875 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
879 * psmouse_poll() - default poll hanlder. Everyone except for ALPS uses it.
882 static int psmouse_poll(struct psmouse
*psmouse
)
884 return ps2_command(&psmouse
->ps2dev
, psmouse
->packet
,
885 PSMOUSE_CMD_POLL
| (psmouse
->pktsize
<< 8));
890 * psmouse_resync() attempts to re-validate current protocol.
893 static void psmouse_resync(void *p
)
895 struct psmouse
*psmouse
= p
, *parent
= NULL
;
896 struct serio
*serio
= psmouse
->ps2dev
.serio
;
897 psmouse_ret_t rc
= PSMOUSE_GOOD_DATA
;
898 int failed
= 0, enabled
= 0;
901 mutex_lock(&psmouse_mutex
);
903 if (psmouse
->state
!= PSMOUSE_RESYNCING
)
906 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
907 parent
= serio_get_drvdata(serio
->parent
);
908 psmouse_deactivate(parent
);
912 * Some mice don't ACK commands sent while they are in the middle of
913 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
914 * instead of ps2_command() which would wait for 200ms for an ACK
915 * that may never come.
916 * As an additional quirk ALPS touchpads may not only forget to ACK
917 * disable command but will stop reporting taps, so if we see that
918 * mouse at least once ACKs disable we will do full reconnect if ACK
921 psmouse
->num_resyncs
++;
923 if (ps2_sendbyte(&psmouse
->ps2dev
, PSMOUSE_CMD_DISABLE
, 20)) {
924 if (psmouse
->num_resyncs
< 3 || psmouse
->acks_disable_command
)
927 psmouse
->acks_disable_command
= 1;
930 * Poll the mouse. If it was reset the packet will be shorter than
931 * psmouse->pktsize and ps2_command will fail. We do not expect and
932 * do not handle scenario when mouse "upgrades" its protocol while
933 * disconnected since it would require additional delay. If we ever
934 * see a mouse that does it we'll adjust the code.
937 if (psmouse
->poll(psmouse
))
940 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
941 for (i
= 0; i
< psmouse
->pktsize
; i
++) {
943 rc
= psmouse
->protocol_handler(psmouse
, NULL
);
944 if (rc
!= PSMOUSE_GOOD_DATA
)
947 if (rc
!= PSMOUSE_FULL_PACKET
)
949 psmouse_set_state(psmouse
, PSMOUSE_RESYNCING
);
953 * Now try to enable mouse. We try to do that even if poll failed and also
954 * repeat our attempts 5 times, otherwise we may be left out with disabled
957 for (i
= 0; i
< 5; i
++) {
958 if (!ps2_command(&psmouse
->ps2dev
, NULL
, PSMOUSE_CMD_ENABLE
)) {
966 printk(KERN_WARNING
"psmouse.c: failed to re-enable mouse on %s\n",
967 psmouse
->ps2dev
.serio
->phys
);
972 psmouse_set_state(psmouse
, PSMOUSE_IGNORE
);
973 printk(KERN_INFO
"psmouse.c: resync failed, issuing reconnect request\n");
974 serio_reconnect(serio
);
976 psmouse_set_state(psmouse
, PSMOUSE_ACTIVATED
);
979 psmouse_activate(parent
);
981 mutex_unlock(&psmouse_mutex
);
985 * psmouse_cleanup() resets the mouse into power-on state.
988 static void psmouse_cleanup(struct serio
*serio
)
990 struct psmouse
*psmouse
= serio_get_drvdata(serio
);
992 psmouse_reset(psmouse
);
996 * psmouse_disconnect() closes and frees.
999 static void psmouse_disconnect(struct serio
*serio
)
1001 struct psmouse
*psmouse
, *parent
= NULL
;
1003 psmouse
= serio_get_drvdata(serio
);
1005 sysfs_remove_group(&serio
->dev
.kobj
, &psmouse_attribute_group
);
1007 mutex_lock(&psmouse_mutex
);
1009 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
1011 /* make sure we don't have a resync in progress */
1012 mutex_unlock(&psmouse_mutex
);
1013 flush_workqueue(kpsmoused_wq
);
1014 mutex_lock(&psmouse_mutex
);
1016 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
1017 parent
= serio_get_drvdata(serio
->parent
);
1018 psmouse_deactivate(parent
);
1021 if (psmouse
->disconnect
)
1022 psmouse
->disconnect(psmouse
);
1024 if (parent
&& parent
->pt_deactivate
)
1025 parent
->pt_deactivate(parent
);
1027 psmouse_set_state(psmouse
, PSMOUSE_IGNORE
);
1030 serio_set_drvdata(serio
, NULL
);
1031 input_unregister_device(psmouse
->dev
);
1035 psmouse_activate(parent
);
1037 mutex_unlock(&psmouse_mutex
);
1040 static int psmouse_switch_protocol(struct psmouse
*psmouse
, const struct psmouse_protocol
*proto
)
1042 struct input_dev
*input_dev
= psmouse
->dev
;
1044 input_dev
->private = psmouse
;
1045 input_dev
->cdev
.dev
= &psmouse
->ps2dev
.serio
->dev
;
1047 input_dev
->evbit
[0] = BIT(EV_KEY
) | BIT(EV_REL
);
1048 input_dev
->keybit
[LONG(BTN_MOUSE
)] = BIT(BTN_LEFT
) | BIT(BTN_MIDDLE
) | BIT(BTN_RIGHT
);
1049 input_dev
->relbit
[0] = BIT(REL_X
) | BIT(REL_Y
);
1051 psmouse
->set_rate
= psmouse_set_rate
;
1052 psmouse
->set_resolution
= psmouse_set_resolution
;
1053 psmouse
->poll
= psmouse_poll
;
1054 psmouse
->protocol_handler
= psmouse_process_byte
;
1055 psmouse
->pktsize
= 3;
1057 if (proto
&& (proto
->detect
|| proto
->init
)) {
1058 if (proto
->detect
&& proto
->detect(psmouse
, 1) < 0)
1061 if (proto
->init
&& proto
->init(psmouse
) < 0)
1064 psmouse
->type
= proto
->type
;
1067 psmouse
->type
= psmouse_extensions(psmouse
, psmouse_max_proto
, 1);
1070 * If mouse's packet size is 3 there is no point in polling the
1071 * device in hopes to detect protocol reset - we won't get less
1072 * than 3 bytes response anyhow.
1074 if (psmouse
->pktsize
== 3)
1075 psmouse
->resync_time
= 0;
1078 * Some smart KVMs fake response to POLL command returning just
1079 * 3 bytes and messing up our resync logic, so if initial poll
1080 * fails we won't try polling the device anymore. Hopefully
1081 * such KVM will maintain initially selected protocol.
1083 if (psmouse
->resync_time
&& psmouse
->poll(psmouse
))
1084 psmouse
->resync_time
= 0;
1086 snprintf(psmouse
->devname
, sizeof(psmouse
->devname
), "%s %s %s",
1087 psmouse_protocol_by_type(psmouse
->type
)->name
, psmouse
->vendor
, psmouse
->name
);
1089 input_dev
->name
= psmouse
->devname
;
1090 input_dev
->phys
= psmouse
->phys
;
1091 input_dev
->id
.bustype
= BUS_I8042
;
1092 input_dev
->id
.vendor
= 0x0002;
1093 input_dev
->id
.product
= psmouse
->type
;
1094 input_dev
->id
.version
= psmouse
->model
;
1100 * psmouse_connect() is a callback from the serio module when
1101 * an unhandled serio port is found.
1103 static int psmouse_connect(struct serio
*serio
, struct serio_driver
*drv
)
1105 struct psmouse
*psmouse
, *parent
= NULL
;
1106 struct input_dev
*input_dev
;
1107 int retval
= -ENOMEM
;
1109 mutex_lock(&psmouse_mutex
);
1112 * If this is a pass-through port deactivate parent so the device
1113 * connected to this port can be successfully identified
1115 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
1116 parent
= serio_get_drvdata(serio
->parent
);
1117 psmouse_deactivate(parent
);
1120 psmouse
= kzalloc(sizeof(struct psmouse
), GFP_KERNEL
);
1121 input_dev
= input_allocate_device();
1122 if (!psmouse
|| !input_dev
)
1125 ps2_init(&psmouse
->ps2dev
, serio
);
1126 INIT_WORK(&psmouse
->resync_work
, psmouse_resync
, psmouse
);
1127 psmouse
->dev
= input_dev
;
1128 snprintf(psmouse
->phys
, sizeof(psmouse
->phys
), "%s/input0", serio
->phys
);
1130 psmouse_set_state(psmouse
, PSMOUSE_INITIALIZING
);
1132 serio_set_drvdata(serio
, psmouse
);
1134 retval
= serio_open(serio
, drv
);
1138 if (psmouse_probe(psmouse
) < 0) {
1144 psmouse
->rate
= psmouse_rate
;
1145 psmouse
->resolution
= psmouse_resolution
;
1146 psmouse
->resetafter
= psmouse_resetafter
;
1147 psmouse
->resync_time
= parent
? 0 : psmouse_resync_time
;
1148 psmouse
->smartscroll
= psmouse_smartscroll
;
1150 psmouse_switch_protocol(psmouse
, NULL
);
1152 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
1153 psmouse_initialize(psmouse
);
1155 input_register_device(psmouse
->dev
);
1157 if (parent
&& parent
->pt_activate
)
1158 parent
->pt_activate(parent
);
1160 sysfs_create_group(&serio
->dev
.kobj
, &psmouse_attribute_group
);
1162 psmouse_activate(psmouse
);
1168 serio_set_drvdata(serio
, NULL
);
1169 input_free_device(input_dev
);
1173 /* If this is a pass-through port the parent needs to be re-activated */
1175 psmouse_activate(parent
);
1177 mutex_unlock(&psmouse_mutex
);
1182 static int psmouse_reconnect(struct serio
*serio
)
1184 struct psmouse
*psmouse
= serio_get_drvdata(serio
);
1185 struct psmouse
*parent
= NULL
;
1186 struct serio_driver
*drv
= serio
->drv
;
1189 if (!drv
|| !psmouse
) {
1190 printk(KERN_DEBUG
"psmouse: reconnect request, but serio is disconnected, ignoring...\n");
1194 mutex_lock(&psmouse_mutex
);
1196 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
1197 parent
= serio_get_drvdata(serio
->parent
);
1198 psmouse_deactivate(parent
);
1201 psmouse_set_state(psmouse
, PSMOUSE_INITIALIZING
);
1203 if (psmouse
->reconnect
) {
1204 if (psmouse
->reconnect(psmouse
))
1206 } else if (psmouse_probe(psmouse
) < 0 ||
1207 psmouse
->type
!= psmouse_extensions(psmouse
, psmouse_max_proto
, 0))
1210 /* ok, the device type (and capabilities) match the old one,
1211 * we can continue using it, complete intialization
1213 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
1215 psmouse_initialize(psmouse
);
1217 if (parent
&& parent
->pt_activate
)
1218 parent
->pt_activate(parent
);
1220 psmouse_activate(psmouse
);
1224 /* If this is a pass-through port the parent waits to be activated */
1226 psmouse_activate(parent
);
1228 mutex_unlock(&psmouse_mutex
);
1232 static struct serio_device_id psmouse_serio_ids
[] = {
1240 .type
= SERIO_PS_PSTHRU
,
1248 MODULE_DEVICE_TABLE(serio
, psmouse_serio_ids
);
1250 static struct serio_driver psmouse_drv
= {
1254 .description
= DRIVER_DESC
,
1255 .id_table
= psmouse_serio_ids
,
1256 .interrupt
= psmouse_interrupt
,
1257 .connect
= psmouse_connect
,
1258 .reconnect
= psmouse_reconnect
,
1259 .disconnect
= psmouse_disconnect
,
1260 .cleanup
= psmouse_cleanup
,
1263 ssize_t
psmouse_attr_show_helper(struct device
*dev
, struct device_attribute
*devattr
,
1266 struct serio
*serio
= to_serio_port(dev
);
1267 struct psmouse_attribute
*attr
= to_psmouse_attr(devattr
);
1268 struct psmouse
*psmouse
;
1271 retval
= serio_pin_driver(serio
);
1275 if (serio
->drv
!= &psmouse_drv
) {
1280 psmouse
= serio_get_drvdata(serio
);
1282 retval
= attr
->show(psmouse
, attr
->data
, buf
);
1285 serio_unpin_driver(serio
);
1289 ssize_t
psmouse_attr_set_helper(struct device
*dev
, struct device_attribute
*devattr
,
1290 const char *buf
, size_t count
)
1292 struct serio
*serio
= to_serio_port(dev
);
1293 struct psmouse_attribute
*attr
= to_psmouse_attr(devattr
);
1294 struct psmouse
*psmouse
, *parent
= NULL
;
1297 retval
= serio_pin_driver(serio
);
1301 if (serio
->drv
!= &psmouse_drv
) {
1306 retval
= mutex_lock_interruptible(&psmouse_mutex
);
1310 psmouse
= serio_get_drvdata(serio
);
1312 if (psmouse
->state
== PSMOUSE_IGNORE
) {
1317 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
1318 parent
= serio_get_drvdata(serio
->parent
);
1319 psmouse_deactivate(parent
);
1322 psmouse_deactivate(psmouse
);
1324 retval
= attr
->set(psmouse
, attr
->data
, buf
, count
);
1326 if (retval
!= -ENODEV
)
1327 psmouse_activate(psmouse
);
1330 psmouse_activate(parent
);
1333 mutex_unlock(&psmouse_mutex
);
1335 serio_unpin_driver(serio
);
1339 static ssize_t
psmouse_show_int_attr(struct psmouse
*psmouse
, void *offset
, char *buf
)
1341 unsigned long *field
= (unsigned long *)((char *)psmouse
+ (size_t)offset
);
1343 return sprintf(buf
, "%lu\n", *field
);
1346 static ssize_t
psmouse_set_int_attr(struct psmouse
*psmouse
, void *offset
, const char *buf
, size_t count
)
1348 unsigned long *field
= (unsigned long *)((char *)psmouse
+ (size_t)offset
);
1349 unsigned long value
;
1352 value
= simple_strtoul(buf
, &rest
, 10);
1361 static ssize_t
psmouse_attr_show_protocol(struct psmouse
*psmouse
, void *data
, char *buf
)
1363 return sprintf(buf
, "%s\n", psmouse_protocol_by_type(psmouse
->type
)->name
);
1366 static ssize_t
psmouse_attr_set_protocol(struct psmouse
*psmouse
, void *data
, const char *buf
, size_t count
)
1368 struct serio
*serio
= psmouse
->ps2dev
.serio
;
1369 struct psmouse
*parent
= NULL
;
1370 struct input_dev
*new_dev
;
1371 const struct psmouse_protocol
*proto
;
1374 if (!(proto
= psmouse_protocol_by_name(buf
, count
)))
1377 if (psmouse
->type
== proto
->type
)
1380 if (!(new_dev
= input_allocate_device()))
1383 while (serio
->child
) {
1385 printk(KERN_WARNING
"psmouse: failed to destroy child port, protocol change aborted.\n");
1386 input_free_device(new_dev
);
1390 mutex_unlock(&psmouse_mutex
);
1391 serio_unpin_driver(serio
);
1392 serio_unregister_child_port(serio
);
1393 serio_pin_driver_uninterruptible(serio
);
1394 mutex_lock(&psmouse_mutex
);
1396 if (serio
->drv
!= &psmouse_drv
) {
1397 input_free_device(new_dev
);
1401 if (psmouse
->type
== proto
->type
) {
1402 input_free_device(new_dev
);
1403 return count
; /* switched by other thread */
1407 if (serio
->parent
&& serio
->id
.type
== SERIO_PS_PSTHRU
) {
1408 parent
= serio_get_drvdata(serio
->parent
);
1409 if (parent
->pt_deactivate
)
1410 parent
->pt_deactivate(parent
);
1413 if (psmouse
->disconnect
)
1414 psmouse
->disconnect(psmouse
);
1416 psmouse_set_state(psmouse
, PSMOUSE_IGNORE
);
1417 input_unregister_device(psmouse
->dev
);
1419 psmouse
->dev
= new_dev
;
1420 psmouse_set_state(psmouse
, PSMOUSE_INITIALIZING
);
1422 if (psmouse_switch_protocol(psmouse
, proto
) < 0) {
1423 psmouse_reset(psmouse
);
1424 /* default to PSMOUSE_PS2 */
1425 psmouse_switch_protocol(psmouse
, &psmouse_protocols
[0]);
1428 psmouse_initialize(psmouse
);
1429 psmouse_set_state(psmouse
, PSMOUSE_CMD_MODE
);
1431 input_register_device(psmouse
->dev
);
1433 if (parent
&& parent
->pt_activate
)
1434 parent
->pt_activate(parent
);
1439 static ssize_t
psmouse_attr_set_rate(struct psmouse
*psmouse
, void *data
, const char *buf
, size_t count
)
1441 unsigned long value
;
1444 value
= simple_strtoul(buf
, &rest
, 10);
1448 psmouse
->set_rate(psmouse
, value
);
1452 static ssize_t
psmouse_attr_set_resolution(struct psmouse
*psmouse
, void *data
, const char *buf
, size_t count
)
1454 unsigned long value
;
1457 value
= simple_strtoul(buf
, &rest
, 10);
1461 psmouse
->set_resolution(psmouse
, value
);
1466 static int psmouse_set_maxproto(const char *val
, struct kernel_param
*kp
)
1468 const struct psmouse_protocol
*proto
;
1473 proto
= psmouse_protocol_by_name(val
, strlen(val
));
1475 if (!proto
|| !proto
->maxproto
)
1478 *((unsigned int *)kp
->arg
) = proto
->type
;
1483 static int psmouse_get_maxproto(char *buffer
, struct kernel_param
*kp
)
1485 int type
= *((unsigned int *)kp
->arg
);
1487 return sprintf(buffer
, "%s\n", psmouse_protocol_by_type(type
)->name
);
1490 static int __init
psmouse_init(void)
1492 kpsmoused_wq
= create_singlethread_workqueue("kpsmoused");
1493 if (!kpsmoused_wq
) {
1494 printk(KERN_ERR
"psmouse: failed to create kpsmoused workqueue\n");
1498 serio_register_driver(&psmouse_drv
);
1503 static void __exit
psmouse_exit(void)
1505 serio_unregister_driver(&psmouse_drv
);
1506 destroy_workqueue(kpsmoused_wq
);
1509 module_init(psmouse_init
);
1510 module_exit(psmouse_exit
);