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 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
15 #define psmouse_fmt(fmt) fmt
17 #include <linux/delay.h>
18 #include <linux/module.h>
19 #include <linux/slab.h>
20 #include <linux/interrupt.h>
21 #include <linux/input.h>
22 #include <linux/serio.h>
23 #include <linux/init.h>
24 #include <linux/libps2.h>
25 #include <linux/mutex.h>
28 #include "synaptics.h"
29 #include "logips2pp.h"
33 #include "trackpoint.h"
34 #include "touchkit_ps2.h"
37 #include "cypress_ps2.h"
38 #include "focaltech.h"
42 #define DRIVER_DESC "PS/2 mouse driver"
44 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
45 MODULE_DESCRIPTION(DRIVER_DESC);
46 MODULE_LICENSE("GPL");
48 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
49 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
50 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
51 static const struct kernel_param_ops param_ops_proto_abbrev = {
52 .set = psmouse_set_maxproto,
53 .get = psmouse_get_maxproto,
55 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
56 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
57 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
59 static unsigned int psmouse_resolution = 200;
60 module_param_named(resolution, psmouse_resolution, uint, 0644);
61 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
63 static unsigned int psmouse_rate = 100;
64 module_param_named(rate, psmouse_rate, uint, 0644);
65 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
67 static bool psmouse_smartscroll = true;
68 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
69 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
71 static unsigned int psmouse_resetafter = 5;
72 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
73 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
75 static unsigned int psmouse_resync_time;
76 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
77 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
79 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
81 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
82 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
83 (void *) offsetof(struct psmouse, rate),
84 psmouse_show_int_attr, psmouse_attr_set_rate);
85 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
86 (void *) offsetof(struct psmouse, resolution),
87 psmouse_show_int_attr, psmouse_attr_set_resolution);
88 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
89 (void *) offsetof(struct psmouse, resetafter),
90 psmouse_show_int_attr, psmouse_set_int_attr);
91 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
92 (void *) offsetof(struct psmouse, resync_time),
93 psmouse_show_int_attr, psmouse_set_int_attr);
95 static struct attribute *psmouse_attributes[] = {
96 &psmouse_attr_protocol.dattr.attr,
97 &psmouse_attr_rate.dattr.attr,
98 &psmouse_attr_resolution.dattr.attr,
99 &psmouse_attr_resetafter.dattr.attr,
100 &psmouse_attr_resync_time.dattr.attr,
104 static struct attribute_group psmouse_attribute_group = {
105 .attrs = psmouse_attributes,
109 * psmouse_mutex protects all operations changing state of mouse
110 * (connecting, disconnecting, changing rate or resolution via
111 * sysfs). We could use a per-device semaphore but since there
112 * rarely more than one PS/2 mouse connected and since semaphore
113 * is taken in "slow" paths it is not worth it.
115 static DEFINE_MUTEX(psmouse_mutex);
117 static struct workqueue_struct *kpsmoused_wq;
119 struct psmouse_protocol {
120 enum psmouse_type type;
122 bool ignore_parity; /* Protocol should ignore parity errors from KBC */
123 bool try_passthru; /* Try protocol also on passthrough ports */
126 int (*detect)(struct psmouse *, bool);
127 int (*init)(struct psmouse *);
131 * psmouse_process_byte() analyzes the PS/2 data stream and reports
132 * relevant events to the input module once full packet has arrived.
134 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
136 struct input_dev *dev = psmouse->dev;
137 unsigned char *packet = psmouse->packet;
139 if (psmouse->pktcnt < psmouse->pktsize)
140 return PSMOUSE_GOOD_DATA;
142 /* Full packet accumulated, process it */
144 switch (psmouse->type) {
146 /* IntelliMouse has scroll wheel */
147 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
151 /* Scroll wheel and buttons on IntelliMouse Explorer */
152 switch (packet[3] & 0xC0) {
153 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
154 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
156 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
157 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
161 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
162 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
163 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
169 /* Report scroll buttons on NetMice */
170 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
172 /* Extra buttons on Genius NewNet 3D */
173 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
174 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
177 case PSMOUSE_THINKPS:
178 /* Extra button on ThinkingMouse */
179 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
182 * Without this bit of weirdness moving up gives wildly
185 packet[1] |= (packet[0] & 0x40) << 1;
188 case PSMOUSE_CORTRON:
190 * Cortron PS2 Trackball reports SIDE button in the
191 * 4th bit of the first byte.
193 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
201 /* Generic PS/2 Mouse */
202 input_report_key(dev, BTN_LEFT, packet[0] & 1);
203 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
204 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
206 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
207 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
211 return PSMOUSE_FULL_PACKET;
214 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
217 queue_delayed_work(kpsmoused_wq, work, delay);
221 * __psmouse_set_state() sets new psmouse state and resets all flags.
223 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
225 psmouse->state = new_state;
226 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
227 psmouse->ps2dev.flags = 0;
228 psmouse->last = jiffies;
232 * psmouse_set_state() sets new psmouse state and resets all flags and
233 * counters while holding serio lock so fighting with interrupt handler
236 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
238 serio_pause_rx(psmouse->ps2dev.serio);
239 __psmouse_set_state(psmouse, new_state);
240 serio_continue_rx(psmouse->ps2dev.serio);
244 * psmouse_handle_byte() processes one byte of the input data stream
245 * by calling corresponding protocol handler.
247 static int psmouse_handle_byte(struct psmouse *psmouse)
249 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
252 case PSMOUSE_BAD_DATA:
253 if (psmouse->state == PSMOUSE_ACTIVATED) {
254 psmouse_warn(psmouse,
255 "%s at %s lost sync at byte %d\n",
256 psmouse->name, psmouse->phys,
258 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
259 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
260 psmouse_notice(psmouse,
261 "issuing reconnect request\n");
262 serio_reconnect(psmouse->ps2dev.serio);
269 case PSMOUSE_FULL_PACKET:
271 if (psmouse->out_of_sync_cnt) {
272 psmouse->out_of_sync_cnt = 0;
273 psmouse_notice(psmouse,
274 "%s at %s - driver resynced.\n",
275 psmouse->name, psmouse->phys);
279 case PSMOUSE_GOOD_DATA:
286 * psmouse_interrupt() handles incoming characters, either passing them
287 * for normal processing or gathering them as command response.
289 static irqreturn_t psmouse_interrupt(struct serio *serio,
290 unsigned char data, unsigned int flags)
292 struct psmouse *psmouse = serio_get_drvdata(serio);
294 if (psmouse->state == PSMOUSE_IGNORE)
297 if (unlikely((flags & SERIO_TIMEOUT) ||
298 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
300 if (psmouse->state == PSMOUSE_ACTIVATED)
301 psmouse_warn(psmouse,
302 "bad data from KBC -%s%s\n",
303 flags & SERIO_TIMEOUT ? " timeout" : "",
304 flags & SERIO_PARITY ? " bad parity" : "");
305 ps2_cmd_aborted(&psmouse->ps2dev);
309 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
310 if (ps2_handle_ack(&psmouse->ps2dev, data))
313 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
314 if (ps2_handle_response(&psmouse->ps2dev, data))
317 if (psmouse->state <= PSMOUSE_RESYNCING)
320 if (psmouse->state == PSMOUSE_ACTIVATED &&
321 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
322 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
323 psmouse->name, psmouse->phys, psmouse->pktcnt);
324 psmouse->badbyte = psmouse->packet[0];
325 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
326 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
330 psmouse->packet[psmouse->pktcnt++] = data;
332 /* Check if this is a new device announcement (0xAA 0x00) */
333 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
334 if (psmouse->pktcnt == 1) {
335 psmouse->last = jiffies;
339 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
340 (psmouse->type == PSMOUSE_HGPK &&
341 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
342 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
343 serio_reconnect(serio);
347 /* Not a new device, try processing first byte normally */
349 if (psmouse_handle_byte(psmouse))
352 psmouse->packet[psmouse->pktcnt++] = data;
356 * See if we need to force resync because mouse was idle for
359 if (psmouse->state == PSMOUSE_ACTIVATED &&
360 psmouse->pktcnt == 1 && psmouse->resync_time &&
361 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
362 psmouse->badbyte = psmouse->packet[0];
363 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
364 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
368 psmouse->last = jiffies;
369 psmouse_handle_byte(psmouse);
376 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
377 * using sliced syntax, understood by advanced devices, such as Logitech
378 * or Synaptics touchpads. The command is encoded as:
379 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
382 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
386 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
389 for (i = 6; i >= 0; i -= 2) {
390 unsigned char d = (command >> i) & 3;
391 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
399 * psmouse_reset() resets the mouse into power-on state.
401 int psmouse_reset(struct psmouse *psmouse)
403 unsigned char param[2];
405 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
408 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
415 * Here we set the mouse resolution.
417 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
419 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
422 if (resolution == 0 || resolution > 200)
425 p = params[resolution / 50];
426 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
427 psmouse->resolution = 25 << p;
431 * Here we set the mouse report rate.
433 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
435 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
439 while (rates[i] > rate) i++;
441 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
446 * Here we set the mouse scaling.
448 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
450 ps2_command(&psmouse->ps2dev, NULL,
451 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
452 PSMOUSE_CMD_SETSCALE11);
456 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
458 static int psmouse_poll(struct psmouse *psmouse)
460 return ps2_command(&psmouse->ps2dev, psmouse->packet,
461 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
464 static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
468 for (i = 0; ids[i]; i++)
469 if (!strcasecmp(id, ids[i]))
476 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
478 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
480 struct serio *serio = psmouse->ps2dev.serio;
481 char *p, *fw_id_copy, *save_ptr;
484 if (strncmp(serio->firmware_id, "PNP: ", 5))
487 fw_id_copy = kstrndup(&serio->firmware_id[5],
488 sizeof(serio->firmware_id) - 5,
493 save_ptr = fw_id_copy;
494 while ((p = strsep(&fw_id_copy, " ")) != NULL) {
495 if (psmouse_check_pnp_id(p, ids)) {
506 * Genius NetMouse magic init.
508 static int genius_detect(struct psmouse *psmouse, bool set_properties)
510 struct ps2dev *ps2dev = &psmouse->ps2dev;
511 unsigned char param[4];
514 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
515 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
516 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
517 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
518 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
520 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
523 if (set_properties) {
524 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
525 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
526 __set_bit(BTN_SIDE, psmouse->dev->keybit);
527 __set_bit(REL_WHEEL, psmouse->dev->relbit);
529 psmouse->vendor = "Genius";
530 psmouse->name = "Mouse";
531 psmouse->pktsize = 4;
538 * IntelliMouse magic init.
540 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
542 struct ps2dev *ps2dev = &psmouse->ps2dev;
543 unsigned char param[2];
546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
548 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
550 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
551 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
556 if (set_properties) {
557 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
558 __set_bit(REL_WHEEL, psmouse->dev->relbit);
560 if (!psmouse->vendor)
561 psmouse->vendor = "Generic";
563 psmouse->name = "Wheel Mouse";
564 psmouse->pktsize = 4;
571 * Try IntelliMouse/Explorer magic init.
573 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
575 struct ps2dev *ps2dev = &psmouse->ps2dev;
576 unsigned char param[2];
578 intellimouse_detect(psmouse, 0);
581 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
583 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
585 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
586 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
591 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
593 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
595 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
597 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
599 if (set_properties) {
600 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
601 __set_bit(REL_WHEEL, psmouse->dev->relbit);
602 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
603 __set_bit(BTN_SIDE, psmouse->dev->keybit);
604 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
606 if (!psmouse->vendor)
607 psmouse->vendor = "Generic";
609 psmouse->name = "Explorer Mouse";
610 psmouse->pktsize = 4;
617 * Kensington ThinkingMouse / ExpertMouse magic init.
619 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
621 struct ps2dev *ps2dev = &psmouse->ps2dev;
622 unsigned char param[2];
623 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
627 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
629 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
630 for (i = 0; i < ARRAY_SIZE(seq); i++) {
632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
634 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
639 if (set_properties) {
640 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
641 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
643 psmouse->vendor = "Kensington";
644 psmouse->name = "ThinkingMouse";
651 * Bare PS/2 protocol "detection". Always succeeds.
653 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
655 if (set_properties) {
656 if (!psmouse->vendor)
657 psmouse->vendor = "Generic";
659 psmouse->name = "Mouse";
662 * We have no way of figuring true number of buttons so let's
663 * assume that the device has 3.
665 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
672 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
673 * must be forced by sysfs protocol writing.
675 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
677 if (set_properties) {
678 psmouse->vendor = "Cortron";
679 psmouse->name = "PS/2 Trackball";
681 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
682 __set_bit(BTN_SIDE, psmouse->dev->keybit);
688 static const struct psmouse_protocol psmouse_protocols[] = {
694 .ignore_parity = true,
695 .detect = ps2bare_detect,
696 .try_passthru = true,
698 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
700 .type = PSMOUSE_PS2PP,
703 .detect = ps2pp_detect,
707 .type = PSMOUSE_THINKPS,
710 .detect = thinking_detect,
712 #ifdef CONFIG_MOUSE_PS2_CYPRESS
714 .type = PSMOUSE_CYPRESS,
717 .detect = cypress_detect,
718 .init = cypress_init,
722 .type = PSMOUSE_GENPS,
725 .detect = genius_detect,
728 .type = PSMOUSE_IMPS,
732 .ignore_parity = true,
733 .detect = intellimouse_detect,
734 .try_passthru = true,
737 .type = PSMOUSE_IMEX,
741 .ignore_parity = true,
742 .detect = im_explorer_detect,
743 .try_passthru = true,
745 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
747 .type = PSMOUSE_SYNAPTICS,
749 .alias = "synaptics",
750 .detect = synaptics_detect,
751 .init = synaptics_init,
754 .type = PSMOUSE_SYNAPTICS_RELATIVE,
755 .name = "SynRelPS/2",
756 .alias = "synaptics-relative",
757 .detect = synaptics_detect,
758 .init = synaptics_init_relative,
761 #ifdef CONFIG_MOUSE_PS2_ALPS
763 .type = PSMOUSE_ALPS,
766 .detect = alps_detect,
770 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
772 .type = PSMOUSE_LIFEBOOK,
775 .detect = lifebook_detect,
776 .init = lifebook_init,
779 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
781 .type = PSMOUSE_TRACKPOINT,
783 .alias = "trackpoint",
784 .detect = trackpoint_detect,
785 .try_passthru = true,
788 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
790 .type = PSMOUSE_TOUCHKIT_PS2,
791 .name = "touchkitPS/2",
793 .detect = touchkit_ps2_detect,
796 #ifdef CONFIG_MOUSE_PS2_OLPC
798 .type = PSMOUSE_HGPK,
801 .detect = hgpk_detect,
804 #ifdef CONFIG_MOUSE_PS2_ELANTECH
806 .type = PSMOUSE_ELANTECH,
809 .detect = elantech_detect,
810 .init = elantech_init,
813 #ifdef CONFIG_MOUSE_PS2_SENTELIC
818 .detect = fsp_detect,
823 .type = PSMOUSE_CORTRON,
824 .name = "CortronPS/2",
826 .detect = cortron_detect,
828 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
830 .type = PSMOUSE_FOCALTECH,
831 .name = "FocalTechPS/2",
832 .alias = "focaltech",
833 .detect = focaltech_detect,
834 .init = focaltech_init,
837 #ifdef CONFIG_MOUSE_PS2_VMMOUSE
839 .type = PSMOUSE_VMMOUSE,
840 .name = VMMOUSE_PSNAME,
842 .detect = vmmouse_detect,
843 .init = vmmouse_init,
846 #ifdef CONFIG_MOUSE_PS2_BYD
851 .detect = byd_detect,
856 .type = PSMOUSE_AUTO,
863 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
867 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
868 if (psmouse_protocols[i].type == type)
869 return &psmouse_protocols[i];
874 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
876 const struct psmouse_protocol *proto;
878 proto = __psmouse_protocol_by_type(type);
883 return &psmouse_protocols[0];
886 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
888 const struct psmouse_protocol *p;
891 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
892 p = &psmouse_protocols[i];
894 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
895 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
896 return &psmouse_protocols[i];
903 * Apply default settings to the psmouse structure. Most of them will
904 * be overridden by individual protocol initialization routines.
906 static void psmouse_apply_defaults(struct psmouse *psmouse)
908 struct input_dev *input_dev = psmouse->dev;
910 memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
911 memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
912 memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
913 memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
914 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
916 __set_bit(EV_KEY, input_dev->evbit);
917 __set_bit(EV_REL, input_dev->evbit);
919 __set_bit(BTN_LEFT, input_dev->keybit);
920 __set_bit(BTN_RIGHT, input_dev->keybit);
922 __set_bit(REL_X, input_dev->relbit);
923 __set_bit(REL_Y, input_dev->relbit);
925 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
927 psmouse->set_rate = psmouse_set_rate;
928 psmouse->set_resolution = psmouse_set_resolution;
929 psmouse->set_scale = psmouse_set_scale;
930 psmouse->poll = psmouse_poll;
931 psmouse->protocol_handler = psmouse_process_byte;
932 psmouse->pktsize = 3;
933 psmouse->reconnect = NULL;
934 psmouse->disconnect = NULL;
935 psmouse->cleanup = NULL;
936 psmouse->pt_activate = NULL;
937 psmouse->pt_deactivate = NULL;
940 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
941 struct psmouse *psmouse, bool allow_passthrough,
944 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
945 !allow_passthrough) {
950 psmouse_apply_defaults(psmouse);
952 return detect(psmouse, set_properties) == 0;
955 static bool psmouse_try_protocol(struct psmouse *psmouse,
956 enum psmouse_type type,
957 unsigned int *max_proto,
958 bool set_properties, bool init_allowed)
960 const struct psmouse_protocol *proto;
962 proto = __psmouse_protocol_by_type(type);
966 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
970 if (set_properties && proto->init && init_allowed) {
971 if (proto->init(psmouse) != 0) {
973 * We detected device, but init failed. Adjust
974 * max_proto so we only try standard protocols.
976 if (*max_proto > PSMOUSE_IMEX)
977 *max_proto = PSMOUSE_IMEX;
987 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
988 * the mouse may have.
990 static int psmouse_extensions(struct psmouse *psmouse,
991 unsigned int max_proto, bool set_properties)
993 bool synaptics_hardware = false;
996 * Always check for focaltech, this is safe as it uses pnp-id
999 if (psmouse_do_detect(focaltech_detect,
1000 psmouse, false, set_properties)) {
1001 if (max_proto > PSMOUSE_IMEX &&
1002 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1003 (!set_properties || focaltech_init(psmouse) == 0)) {
1004 return PSMOUSE_FOCALTECH;
1007 * Restrict psmouse_max_proto so that psmouse_initialize()
1008 * does not try to reset rate and resolution, because even
1009 * that upsets the device.
1010 * This also causes us to basically fall through to basic
1011 * protocol detection, where we fully reset the mouse,
1012 * and set it up as bare PS/2 protocol device.
1014 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1018 * We always check for LifeBook because it does not disturb mouse
1019 * (it only checks DMI information).
1021 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1022 set_properties, max_proto > PSMOUSE_IMEX))
1023 return PSMOUSE_LIFEBOOK;
1025 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1026 set_properties, max_proto > PSMOUSE_IMEX))
1027 return PSMOUSE_VMMOUSE;
1030 * Try Kensington ThinkingMouse (we try first, because Synaptics
1031 * probe upsets the ThinkingMouse).
1033 if (max_proto > PSMOUSE_IMEX &&
1034 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1035 set_properties, true)) {
1036 return PSMOUSE_THINKPS;
1040 * Try Synaptics TouchPad. Note that probing is done even if
1041 * Synaptics protocol support is disabled in config - we need to
1042 * know if it is Synaptics so we can reset it properly after
1043 * probing for IntelliMouse.
1045 if (max_proto > PSMOUSE_PS2 &&
1046 psmouse_do_detect(synaptics_detect,
1047 psmouse, false, set_properties)) {
1048 synaptics_hardware = true;
1050 if (max_proto > PSMOUSE_IMEX) {
1052 * Try activating protocol, but check if support is
1053 * enabled first, since we try detecting Synaptics
1054 * even when protocol is disabled.
1056 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
1057 (!set_properties || synaptics_init(psmouse) == 0)) {
1058 return PSMOUSE_SYNAPTICS;
1062 * Some Synaptics touchpads can emulate extended
1063 * protocols (like IMPS/2). Unfortunately
1064 * Logitech/Genius probes confuse some firmware
1065 * versions so we'll have to skip them.
1067 max_proto = PSMOUSE_IMEX;
1071 * Make sure that touchpad is in relative mode, gestures
1072 * (taps) are enabled.
1074 synaptics_reset(psmouse);
1078 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1079 * because Finger Sensing Pad probe upsets some modules of Cypress
1082 if (max_proto > PSMOUSE_IMEX &&
1083 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1084 set_properties, true)) {
1085 return PSMOUSE_CYPRESS;
1088 /* Try ALPS TouchPad */
1089 if (max_proto > PSMOUSE_IMEX) {
1090 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1091 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1092 &max_proto, set_properties, true))
1093 return PSMOUSE_ALPS;
1096 /* Try OLPC HGPK touchpad */
1097 if (max_proto > PSMOUSE_IMEX &&
1098 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1099 set_properties, true)) {
1100 return PSMOUSE_HGPK;
1103 /* Try Elantech touchpad */
1104 if (max_proto > PSMOUSE_IMEX &&
1105 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1106 &max_proto, set_properties, true)) {
1107 return PSMOUSE_ELANTECH;
1110 if (max_proto > PSMOUSE_IMEX) {
1111 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1112 &max_proto, set_properties, true))
1113 return PSMOUSE_GENPS;
1115 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1116 &max_proto, set_properties, true))
1117 return PSMOUSE_PS2PP;
1119 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1120 &max_proto, set_properties, true))
1121 return PSMOUSE_TRACKPOINT;
1123 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1124 &max_proto, set_properties, true))
1125 return PSMOUSE_TOUCHKIT_PS2;
1129 * Try Finger Sensing Pad. We do it here because its probe upsets
1130 * Trackpoint devices (causing TP_READ_ID command to time out).
1132 if (max_proto > PSMOUSE_IMEX &&
1133 psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1134 &max_proto, set_properties, true)) {
1139 * Reset to defaults in case the device got confused by extended
1140 * protocol probes. Note that we follow up with full reset because
1141 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1143 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1144 psmouse_reset(psmouse);
1146 if (max_proto >= PSMOUSE_IMEX &&
1147 psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1148 &max_proto, set_properties, true)) {
1149 return PSMOUSE_IMEX;
1152 if (max_proto >= PSMOUSE_IMPS &&
1153 psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1154 &max_proto, set_properties, true)) {
1155 return PSMOUSE_IMPS;
1159 * Okay, all failed, we have a standard mouse here. The number of
1160 * the buttons is still a question, though. We assume 3.
1162 psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1163 &max_proto, set_properties, true);
1165 if (synaptics_hardware) {
1167 * We detected Synaptics hardware but it did not respond to
1168 * IMPS/2 probes. We need to reset the touchpad because if
1169 * there is a track point on the pass through port it could
1170 * get disabled while probing for protocol extensions.
1172 psmouse_reset(psmouse);
1179 * psmouse_probe() probes for a PS/2 mouse.
1181 static int psmouse_probe(struct psmouse *psmouse)
1183 struct ps2dev *ps2dev = &psmouse->ps2dev;
1184 unsigned char param[2];
1187 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1188 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1189 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1190 * subsequent ID queries, probably due to a firmware bug.
1193 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1196 if (param[0] != 0x00 && param[0] != 0x03 &&
1197 param[0] != 0x04 && param[0] != 0xff)
1201 * Then we reset and disable the mouse so that it doesn't generate
1204 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1205 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1206 ps2dev->serio->phys);
1212 * psmouse_initialize() initializes the mouse to a sane state.
1214 static void psmouse_initialize(struct psmouse *psmouse)
1217 * We set the mouse report rate, resolution and scaling.
1219 if (psmouse_max_proto != PSMOUSE_PS2) {
1220 psmouse->set_rate(psmouse, psmouse->rate);
1221 psmouse->set_resolution(psmouse, psmouse->resolution);
1222 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1227 * psmouse_activate() enables the mouse so that we get motion reports from it.
1229 int psmouse_activate(struct psmouse *psmouse)
1231 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1232 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1233 psmouse->ps2dev.serio->phys);
1237 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1242 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1243 * motion reports from it unless we explicitly request it.
1245 int psmouse_deactivate(struct psmouse *psmouse)
1247 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1248 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1249 psmouse->ps2dev.serio->phys);
1253 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1258 * psmouse_resync() attempts to re-validate current protocol.
1260 static void psmouse_resync(struct work_struct *work)
1262 struct psmouse *parent = NULL, *psmouse =
1263 container_of(work, struct psmouse, resync_work.work);
1264 struct serio *serio = psmouse->ps2dev.serio;
1265 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1266 bool failed = false, enabled = false;
1269 mutex_lock(&psmouse_mutex);
1271 if (psmouse->state != PSMOUSE_RESYNCING)
1274 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1275 parent = serio_get_drvdata(serio->parent);
1276 psmouse_deactivate(parent);
1280 * Some mice don't ACK commands sent while they are in the middle of
1281 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1282 * instead of ps2_command() which would wait for 200ms for an ACK
1283 * that may never come.
1284 * As an additional quirk ALPS touchpads may not only forget to ACK
1285 * disable command but will stop reporting taps, so if we see that
1286 * mouse at least once ACKs disable we will do full reconnect if ACK
1289 psmouse->num_resyncs++;
1291 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1292 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1295 psmouse->acks_disable_command = true;
1298 * Poll the mouse. If it was reset the packet will be shorter than
1299 * psmouse->pktsize and ps2_command will fail. We do not expect and
1300 * do not handle scenario when mouse "upgrades" its protocol while
1301 * disconnected since it would require additional delay. If we ever
1302 * see a mouse that does it we'll adjust the code.
1305 if (psmouse->poll(psmouse))
1308 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1309 for (i = 0; i < psmouse->pktsize; i++) {
1311 rc = psmouse->protocol_handler(psmouse);
1312 if (rc != PSMOUSE_GOOD_DATA)
1315 if (rc != PSMOUSE_FULL_PACKET)
1317 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1322 * Now try to enable mouse. We try to do that even if poll failed
1323 * and also repeat our attempts 5 times, otherwise we may be left
1324 * out with disabled mouse.
1326 for (i = 0; i < 5; i++) {
1327 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1335 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1336 psmouse->ps2dev.serio->phys);
1341 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1342 psmouse_info(psmouse,
1343 "resync failed, issuing reconnect request\n");
1344 serio_reconnect(serio);
1346 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1349 psmouse_activate(parent);
1351 mutex_unlock(&psmouse_mutex);
1355 * psmouse_cleanup() resets the mouse into power-on state.
1357 static void psmouse_cleanup(struct serio *serio)
1359 struct psmouse *psmouse = serio_get_drvdata(serio);
1360 struct psmouse *parent = NULL;
1362 mutex_lock(&psmouse_mutex);
1364 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1365 parent = serio_get_drvdata(serio->parent);
1366 psmouse_deactivate(parent);
1369 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1372 * Disable stream mode so cleanup routine can proceed undisturbed.
1374 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1375 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1376 psmouse->ps2dev.serio->phys);
1378 if (psmouse->cleanup)
1379 psmouse->cleanup(psmouse);
1382 * Reset the mouse to defaults (bare PS/2 protocol).
1384 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1387 * Some boxes, such as HP nx7400, get terribly confused if mouse
1388 * is not fully enabled before suspending/shutting down.
1390 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1393 if (parent->pt_deactivate)
1394 parent->pt_deactivate(parent);
1396 psmouse_activate(parent);
1399 mutex_unlock(&psmouse_mutex);
1403 * psmouse_disconnect() closes and frees.
1405 static void psmouse_disconnect(struct serio *serio)
1407 struct psmouse *psmouse, *parent = NULL;
1409 psmouse = serio_get_drvdata(serio);
1411 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1413 mutex_lock(&psmouse_mutex);
1415 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1417 /* make sure we don't have a resync in progress */
1418 mutex_unlock(&psmouse_mutex);
1419 flush_workqueue(kpsmoused_wq);
1420 mutex_lock(&psmouse_mutex);
1422 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1423 parent = serio_get_drvdata(serio->parent);
1424 psmouse_deactivate(parent);
1427 if (psmouse->disconnect)
1428 psmouse->disconnect(psmouse);
1430 if (parent && parent->pt_deactivate)
1431 parent->pt_deactivate(parent);
1433 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1436 serio_set_drvdata(serio, NULL);
1437 input_unregister_device(psmouse->dev);
1441 psmouse_activate(parent);
1443 mutex_unlock(&psmouse_mutex);
1446 static int psmouse_switch_protocol(struct psmouse *psmouse,
1447 const struct psmouse_protocol *proto)
1449 const struct psmouse_protocol *selected_proto;
1450 struct input_dev *input_dev = psmouse->dev;
1452 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1454 if (proto && (proto->detect || proto->init)) {
1455 psmouse_apply_defaults(psmouse);
1457 if (proto->detect && proto->detect(psmouse, true) < 0)
1460 if (proto->init && proto->init(psmouse) < 0)
1463 psmouse->type = proto->type;
1464 selected_proto = proto;
1466 psmouse->type = psmouse_extensions(psmouse,
1467 psmouse_max_proto, true);
1468 selected_proto = psmouse_protocol_by_type(psmouse->type);
1471 psmouse->ignore_parity = selected_proto->ignore_parity;
1474 * If mouse's packet size is 3 there is no point in polling the
1475 * device in hopes to detect protocol reset - we won't get less
1476 * than 3 bytes response anyhow.
1478 if (psmouse->pktsize == 3)
1479 psmouse->resync_time = 0;
1482 * Some smart KVMs fake response to POLL command returning just
1483 * 3 bytes and messing up our resync logic, so if initial poll
1484 * fails we won't try polling the device anymore. Hopefully
1485 * such KVM will maintain initially selected protocol.
1487 if (psmouse->resync_time && psmouse->poll(psmouse))
1488 psmouse->resync_time = 0;
1490 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1491 selected_proto->name, psmouse->vendor, psmouse->name);
1493 input_dev->name = psmouse->devname;
1494 input_dev->phys = psmouse->phys;
1495 input_dev->id.bustype = BUS_I8042;
1496 input_dev->id.vendor = 0x0002;
1497 input_dev->id.product = psmouse->type;
1498 input_dev->id.version = psmouse->model;
1504 * psmouse_connect() is a callback from the serio module when
1505 * an unhandled serio port is found.
1507 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1509 struct psmouse *psmouse, *parent = NULL;
1510 struct input_dev *input_dev;
1511 int retval = 0, error = -ENOMEM;
1513 mutex_lock(&psmouse_mutex);
1516 * If this is a pass-through port deactivate parent so the device
1517 * connected to this port can be successfully identified
1519 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1520 parent = serio_get_drvdata(serio->parent);
1521 psmouse_deactivate(parent);
1524 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1525 input_dev = input_allocate_device();
1526 if (!psmouse || !input_dev)
1529 ps2_init(&psmouse->ps2dev, serio);
1530 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1531 psmouse->dev = input_dev;
1532 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1534 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1536 serio_set_drvdata(serio, psmouse);
1538 error = serio_open(serio, drv);
1540 goto err_clear_drvdata;
1542 /* give PT device some time to settle down before probing */
1543 if (serio->id.type == SERIO_PS_PSTHRU)
1544 usleep_range(10000, 15000);
1546 if (psmouse_probe(psmouse) < 0) {
1548 goto err_close_serio;
1551 psmouse->rate = psmouse_rate;
1552 psmouse->resolution = psmouse_resolution;
1553 psmouse->resetafter = psmouse_resetafter;
1554 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1555 psmouse->smartscroll = psmouse_smartscroll;
1557 psmouse_switch_protocol(psmouse, NULL);
1559 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1560 psmouse_initialize(psmouse);
1562 error = input_register_device(psmouse->dev);
1564 goto err_protocol_disconnect;
1566 if (parent && parent->pt_activate)
1567 parent->pt_activate(parent);
1569 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1571 goto err_pt_deactivate;
1573 psmouse_activate(psmouse);
1576 /* If this is a pass-through port the parent needs to be re-activated */
1578 psmouse_activate(parent);
1580 mutex_unlock(&psmouse_mutex);
1584 if (parent && parent->pt_deactivate)
1585 parent->pt_deactivate(parent);
1586 input_unregister_device(psmouse->dev);
1587 input_dev = NULL; /* so we don't try to free it below */
1588 err_protocol_disconnect:
1589 if (psmouse->disconnect)
1590 psmouse->disconnect(psmouse);
1591 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1595 serio_set_drvdata(serio, NULL);
1597 input_free_device(input_dev);
1604 static int psmouse_reconnect(struct serio *serio)
1606 struct psmouse *psmouse = serio_get_drvdata(serio);
1607 struct psmouse *parent = NULL;
1611 mutex_lock(&psmouse_mutex);
1613 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1614 parent = serio_get_drvdata(serio->parent);
1615 psmouse_deactivate(parent);
1618 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1620 if (psmouse->reconnect) {
1621 if (psmouse->reconnect(psmouse))
1624 psmouse_reset(psmouse);
1626 if (psmouse_probe(psmouse) < 0)
1629 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1630 if (psmouse->type != type)
1635 * OK, the device type (and capabilities) match the old one,
1636 * we can continue using it, complete initialization
1638 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1640 psmouse_initialize(psmouse);
1642 if (parent && parent->pt_activate)
1643 parent->pt_activate(parent);
1645 psmouse_activate(psmouse);
1649 /* If this is a pass-through port the parent waits to be activated */
1651 psmouse_activate(parent);
1653 mutex_unlock(&psmouse_mutex);
1657 static struct serio_device_id psmouse_serio_ids[] = {
1665 .type = SERIO_PS_PSTHRU,
1673 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1675 static struct serio_driver psmouse_drv = {
1679 .description = DRIVER_DESC,
1680 .id_table = psmouse_serio_ids,
1681 .interrupt = psmouse_interrupt,
1682 .connect = psmouse_connect,
1683 .reconnect = psmouse_reconnect,
1684 .disconnect = psmouse_disconnect,
1685 .cleanup = psmouse_cleanup,
1688 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1691 struct serio *serio = to_serio_port(dev);
1692 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1693 struct psmouse *psmouse;
1695 psmouse = serio_get_drvdata(serio);
1697 return attr->show(psmouse, attr->data, buf);
1700 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1701 const char *buf, size_t count)
1703 struct serio *serio = to_serio_port(dev);
1704 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1705 struct psmouse *psmouse, *parent = NULL;
1708 retval = mutex_lock_interruptible(&psmouse_mutex);
1712 psmouse = serio_get_drvdata(serio);
1714 if (attr->protect) {
1715 if (psmouse->state == PSMOUSE_IGNORE) {
1720 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1721 parent = serio_get_drvdata(serio->parent);
1722 psmouse_deactivate(parent);
1725 psmouse_deactivate(psmouse);
1728 retval = attr->set(psmouse, attr->data, buf, count);
1730 if (attr->protect) {
1731 if (retval != -ENODEV)
1732 psmouse_activate(psmouse);
1735 psmouse_activate(parent);
1739 mutex_unlock(&psmouse_mutex);
1744 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1746 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1748 return sprintf(buf, "%u\n", *field);
1751 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1753 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1757 err = kstrtouint(buf, 10, &value);
1766 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1768 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1771 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1773 struct serio *serio = psmouse->ps2dev.serio;
1774 struct psmouse *parent = NULL;
1775 struct input_dev *old_dev, *new_dev;
1776 const struct psmouse_protocol *proto, *old_proto;
1780 proto = psmouse_protocol_by_name(buf, count);
1784 if (psmouse->type == proto->type)
1787 new_dev = input_allocate_device();
1791 while (!list_empty(&serio->children)) {
1793 psmouse_warn(psmouse,
1794 "failed to destroy children ports, protocol change aborted.\n");
1795 input_free_device(new_dev);
1799 mutex_unlock(&psmouse_mutex);
1800 serio_unregister_child_port(serio);
1801 mutex_lock(&psmouse_mutex);
1803 if (serio->drv != &psmouse_drv) {
1804 input_free_device(new_dev);
1808 if (psmouse->type == proto->type) {
1809 input_free_device(new_dev);
1810 return count; /* switched by other thread */
1814 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1815 parent = serio_get_drvdata(serio->parent);
1816 if (parent->pt_deactivate)
1817 parent->pt_deactivate(parent);
1820 old_dev = psmouse->dev;
1821 old_proto = psmouse_protocol_by_type(psmouse->type);
1823 if (psmouse->disconnect)
1824 psmouse->disconnect(psmouse);
1826 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1828 psmouse->dev = new_dev;
1829 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1831 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1832 psmouse_reset(psmouse);
1833 /* default to PSMOUSE_PS2 */
1834 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1837 psmouse_initialize(psmouse);
1838 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1840 error = input_register_device(psmouse->dev);
1842 if (psmouse->disconnect)
1843 psmouse->disconnect(psmouse);
1845 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1846 input_free_device(new_dev);
1847 psmouse->dev = old_dev;
1848 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1849 psmouse_switch_protocol(psmouse, old_proto);
1850 psmouse_initialize(psmouse);
1851 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1856 input_unregister_device(old_dev);
1858 if (parent && parent->pt_activate)
1859 parent->pt_activate(parent);
1864 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1869 err = kstrtouint(buf, 10, &value);
1873 psmouse->set_rate(psmouse, value);
1877 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1882 err = kstrtouint(buf, 10, &value);
1886 psmouse->set_resolution(psmouse, value);
1891 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1893 const struct psmouse_protocol *proto;
1898 proto = psmouse_protocol_by_name(val, strlen(val));
1900 if (!proto || !proto->maxproto)
1903 *((unsigned int *)kp->arg) = proto->type;
1908 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1910 int type = *((unsigned int *)kp->arg);
1912 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1915 static int __init psmouse_init(void)
1919 lifebook_module_init();
1920 synaptics_module_init();
1923 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
1924 if (!kpsmoused_wq) {
1925 pr_err("failed to create kpsmoused workqueue\n");
1929 err = serio_register_driver(&psmouse_drv);
1931 destroy_workqueue(kpsmoused_wq);
1936 static void __exit psmouse_exit(void)
1938 serio_unregister_driver(&psmouse_drv);
1939 destroy_workqueue(kpsmoused_wq);
1942 module_init(psmouse_init);
1943 module_exit(psmouse_exit);