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_try_protocol(struct psmouse *psmouse,
941 enum psmouse_type type,
942 unsigned int *max_proto,
943 bool set_properties, bool init_allowed)
945 const struct psmouse_protocol *proto;
947 proto = __psmouse_protocol_by_type(type);
951 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
952 !proto->try_passthru) {
957 psmouse_apply_defaults(psmouse);
959 if (proto->detect(psmouse, set_properties) != 0)
962 if (set_properties && proto->init && init_allowed) {
963 if (proto->init(psmouse) != 0) {
965 * We detected device, but init failed. Adjust
966 * max_proto so we only try standard protocols.
968 if (*max_proto > PSMOUSE_IMEX)
969 *max_proto = PSMOUSE_IMEX;
979 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
980 * the mouse may have.
982 static int psmouse_extensions(struct psmouse *psmouse,
983 unsigned int max_proto, bool set_properties)
985 bool synaptics_hardware = false;
988 * Always check for focaltech, this is safe as it uses pnp-id
991 if (psmouse_try_protocol(psmouse, PSMOUSE_FOCALTECH,
992 &max_proto, set_properties, false)) {
993 if (max_proto > PSMOUSE_IMEX &&
994 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
995 (!set_properties || focaltech_init(psmouse) == 0)) {
996 return PSMOUSE_FOCALTECH;
999 * Restrict psmouse_max_proto so that psmouse_initialize()
1000 * does not try to reset rate and resolution, because even
1001 * that upsets the device.
1002 * This also causes us to basically fall through to basic
1003 * protocol detection, where we fully reset the mouse,
1004 * and set it up as bare PS/2 protocol device.
1006 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1010 * We always check for LifeBook because it does not disturb mouse
1011 * (it only checks DMI information).
1013 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1014 set_properties, max_proto > PSMOUSE_IMEX))
1015 return PSMOUSE_LIFEBOOK;
1017 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1018 set_properties, max_proto > PSMOUSE_IMEX))
1019 return PSMOUSE_VMMOUSE;
1022 * Try Kensington ThinkingMouse (we try first, because Synaptics
1023 * probe upsets the ThinkingMouse).
1025 if (max_proto > PSMOUSE_IMEX &&
1026 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1027 set_properties, true)) {
1028 return PSMOUSE_THINKPS;
1032 * Try Synaptics TouchPad. Note that probing is done even if
1033 * Synaptics protocol support is disabled in config - we need to
1034 * know if it is Synaptics so we can reset it properly after
1035 * probing for IntelliMouse.
1037 if (max_proto > PSMOUSE_PS2 &&
1038 psmouse_try_protocol(psmouse, PSMOUSE_SYNAPTICS, &max_proto,
1039 set_properties, false)) {
1040 synaptics_hardware = true;
1042 if (max_proto > PSMOUSE_IMEX) {
1044 * Try activating protocol, but check if support is
1045 * enabled first, since we try detecting Synaptics
1046 * even when protocol is disabled.
1048 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) &&
1049 (!set_properties || synaptics_init(psmouse) == 0)) {
1050 return PSMOUSE_SYNAPTICS;
1054 * Some Synaptics touchpads can emulate extended
1055 * protocols (like IMPS/2). Unfortunately
1056 * Logitech/Genius probes confuse some firmware
1057 * versions so we'll have to skip them.
1059 max_proto = PSMOUSE_IMEX;
1063 * Make sure that touchpad is in relative mode, gestures
1064 * (taps) are enabled.
1066 synaptics_reset(psmouse);
1070 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1071 * because Finger Sensing Pad probe upsets some modules of Cypress
1074 if (max_proto > PSMOUSE_IMEX &&
1075 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1076 set_properties, true)) {
1077 return PSMOUSE_CYPRESS;
1080 /* Try ALPS TouchPad */
1081 if (max_proto > PSMOUSE_IMEX) {
1082 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1083 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1084 &max_proto, set_properties, true))
1085 return PSMOUSE_ALPS;
1088 /* Try OLPC HGPK touchpad */
1089 if (max_proto > PSMOUSE_IMEX &&
1090 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1091 set_properties, true)) {
1092 return PSMOUSE_HGPK;
1095 /* Try Elantech touchpad */
1096 if (max_proto > PSMOUSE_IMEX &&
1097 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1098 &max_proto, set_properties, true)) {
1099 return PSMOUSE_ELANTECH;
1102 if (max_proto > PSMOUSE_IMEX) {
1103 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1104 &max_proto, set_properties, true))
1105 return PSMOUSE_GENPS;
1107 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1108 &max_proto, set_properties, true))
1109 return PSMOUSE_PS2PP;
1111 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1112 &max_proto, set_properties, true))
1113 return PSMOUSE_TRACKPOINT;
1115 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1116 &max_proto, set_properties, true))
1117 return PSMOUSE_TOUCHKIT_PS2;
1121 * Try Finger Sensing Pad. We do it here because its probe upsets
1122 * Trackpoint devices (causing TP_READ_ID command to time out).
1124 if (max_proto > PSMOUSE_IMEX &&
1125 psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1126 &max_proto, set_properties, true)) {
1131 * Reset to defaults in case the device got confused by extended
1132 * protocol probes. Note that we follow up with full reset because
1133 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1135 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1136 psmouse_reset(psmouse);
1138 if (max_proto >= PSMOUSE_IMEX &&
1139 psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1140 &max_proto, set_properties, true)) {
1141 return PSMOUSE_IMEX;
1144 if (max_proto >= PSMOUSE_IMPS &&
1145 psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1146 &max_proto, set_properties, true)) {
1147 return PSMOUSE_IMPS;
1151 * Okay, all failed, we have a standard mouse here. The number of
1152 * the buttons is still a question, though. We assume 3.
1154 psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1155 &max_proto, set_properties, true);
1157 if (synaptics_hardware) {
1159 * We detected Synaptics hardware but it did not respond to
1160 * IMPS/2 probes. We need to reset the touchpad because if
1161 * there is a track point on the pass through port it could
1162 * get disabled while probing for protocol extensions.
1164 psmouse_reset(psmouse);
1171 * psmouse_probe() probes for a PS/2 mouse.
1173 static int psmouse_probe(struct psmouse *psmouse)
1175 struct ps2dev *ps2dev = &psmouse->ps2dev;
1176 unsigned char param[2];
1179 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1180 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1181 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1182 * subsequent ID queries, probably due to a firmware bug.
1185 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1188 if (param[0] != 0x00 && param[0] != 0x03 &&
1189 param[0] != 0x04 && param[0] != 0xff)
1193 * Then we reset and disable the mouse so that it doesn't generate
1196 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1197 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1198 ps2dev->serio->phys);
1204 * psmouse_initialize() initializes the mouse to a sane state.
1206 static void psmouse_initialize(struct psmouse *psmouse)
1209 * We set the mouse report rate, resolution and scaling.
1211 if (psmouse_max_proto != PSMOUSE_PS2) {
1212 psmouse->set_rate(psmouse, psmouse->rate);
1213 psmouse->set_resolution(psmouse, psmouse->resolution);
1214 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1219 * psmouse_activate() enables the mouse so that we get motion reports from it.
1221 int psmouse_activate(struct psmouse *psmouse)
1223 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1224 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1225 psmouse->ps2dev.serio->phys);
1229 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1234 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1235 * motion reports from it unless we explicitly request it.
1237 int psmouse_deactivate(struct psmouse *psmouse)
1239 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1240 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1241 psmouse->ps2dev.serio->phys);
1245 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1250 * psmouse_resync() attempts to re-validate current protocol.
1252 static void psmouse_resync(struct work_struct *work)
1254 struct psmouse *parent = NULL, *psmouse =
1255 container_of(work, struct psmouse, resync_work.work);
1256 struct serio *serio = psmouse->ps2dev.serio;
1257 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1258 bool failed = false, enabled = false;
1261 mutex_lock(&psmouse_mutex);
1263 if (psmouse->state != PSMOUSE_RESYNCING)
1266 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1267 parent = serio_get_drvdata(serio->parent);
1268 psmouse_deactivate(parent);
1272 * Some mice don't ACK commands sent while they are in the middle of
1273 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1274 * instead of ps2_command() which would wait for 200ms for an ACK
1275 * that may never come.
1276 * As an additional quirk ALPS touchpads may not only forget to ACK
1277 * disable command but will stop reporting taps, so if we see that
1278 * mouse at least once ACKs disable we will do full reconnect if ACK
1281 psmouse->num_resyncs++;
1283 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1284 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1287 psmouse->acks_disable_command = true;
1290 * Poll the mouse. If it was reset the packet will be shorter than
1291 * psmouse->pktsize and ps2_command will fail. We do not expect and
1292 * do not handle scenario when mouse "upgrades" its protocol while
1293 * disconnected since it would require additional delay. If we ever
1294 * see a mouse that does it we'll adjust the code.
1297 if (psmouse->poll(psmouse))
1300 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1301 for (i = 0; i < psmouse->pktsize; i++) {
1303 rc = psmouse->protocol_handler(psmouse);
1304 if (rc != PSMOUSE_GOOD_DATA)
1307 if (rc != PSMOUSE_FULL_PACKET)
1309 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1314 * Now try to enable mouse. We try to do that even if poll failed
1315 * and also repeat our attempts 5 times, otherwise we may be left
1316 * out with disabled mouse.
1318 for (i = 0; i < 5; i++) {
1319 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1327 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1328 psmouse->ps2dev.serio->phys);
1333 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1334 psmouse_info(psmouse,
1335 "resync failed, issuing reconnect request\n");
1336 serio_reconnect(serio);
1338 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1341 psmouse_activate(parent);
1343 mutex_unlock(&psmouse_mutex);
1347 * psmouse_cleanup() resets the mouse into power-on state.
1349 static void psmouse_cleanup(struct serio *serio)
1351 struct psmouse *psmouse = serio_get_drvdata(serio);
1352 struct psmouse *parent = NULL;
1354 mutex_lock(&psmouse_mutex);
1356 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1357 parent = serio_get_drvdata(serio->parent);
1358 psmouse_deactivate(parent);
1361 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1364 * Disable stream mode so cleanup routine can proceed undisturbed.
1366 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1367 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1368 psmouse->ps2dev.serio->phys);
1370 if (psmouse->cleanup)
1371 psmouse->cleanup(psmouse);
1374 * Reset the mouse to defaults (bare PS/2 protocol).
1376 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1379 * Some boxes, such as HP nx7400, get terribly confused if mouse
1380 * is not fully enabled before suspending/shutting down.
1382 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1385 if (parent->pt_deactivate)
1386 parent->pt_deactivate(parent);
1388 psmouse_activate(parent);
1391 mutex_unlock(&psmouse_mutex);
1395 * psmouse_disconnect() closes and frees.
1397 static void psmouse_disconnect(struct serio *serio)
1399 struct psmouse *psmouse, *parent = NULL;
1401 psmouse = serio_get_drvdata(serio);
1403 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1405 mutex_lock(&psmouse_mutex);
1407 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1409 /* make sure we don't have a resync in progress */
1410 mutex_unlock(&psmouse_mutex);
1411 flush_workqueue(kpsmoused_wq);
1412 mutex_lock(&psmouse_mutex);
1414 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1415 parent = serio_get_drvdata(serio->parent);
1416 psmouse_deactivate(parent);
1419 if (psmouse->disconnect)
1420 psmouse->disconnect(psmouse);
1422 if (parent && parent->pt_deactivate)
1423 parent->pt_deactivate(parent);
1425 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1428 serio_set_drvdata(serio, NULL);
1429 input_unregister_device(psmouse->dev);
1433 psmouse_activate(parent);
1435 mutex_unlock(&psmouse_mutex);
1438 static int psmouse_switch_protocol(struct psmouse *psmouse,
1439 const struct psmouse_protocol *proto)
1441 const struct psmouse_protocol *selected_proto;
1442 struct input_dev *input_dev = psmouse->dev;
1444 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1446 if (proto && (proto->detect || proto->init)) {
1447 psmouse_apply_defaults(psmouse);
1449 if (proto->detect && proto->detect(psmouse, true) < 0)
1452 if (proto->init && proto->init(psmouse) < 0)
1455 psmouse->type = proto->type;
1456 selected_proto = proto;
1458 psmouse->type = psmouse_extensions(psmouse,
1459 psmouse_max_proto, true);
1460 selected_proto = psmouse_protocol_by_type(psmouse->type);
1463 psmouse->ignore_parity = selected_proto->ignore_parity;
1466 * If mouse's packet size is 3 there is no point in polling the
1467 * device in hopes to detect protocol reset - we won't get less
1468 * than 3 bytes response anyhow.
1470 if (psmouse->pktsize == 3)
1471 psmouse->resync_time = 0;
1474 * Some smart KVMs fake response to POLL command returning just
1475 * 3 bytes and messing up our resync logic, so if initial poll
1476 * fails we won't try polling the device anymore. Hopefully
1477 * such KVM will maintain initially selected protocol.
1479 if (psmouse->resync_time && psmouse->poll(psmouse))
1480 psmouse->resync_time = 0;
1482 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1483 selected_proto->name, psmouse->vendor, psmouse->name);
1485 input_dev->name = psmouse->devname;
1486 input_dev->phys = psmouse->phys;
1487 input_dev->id.bustype = BUS_I8042;
1488 input_dev->id.vendor = 0x0002;
1489 input_dev->id.product = psmouse->type;
1490 input_dev->id.version = psmouse->model;
1496 * psmouse_connect() is a callback from the serio module when
1497 * an unhandled serio port is found.
1499 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1501 struct psmouse *psmouse, *parent = NULL;
1502 struct input_dev *input_dev;
1503 int retval = 0, error = -ENOMEM;
1505 mutex_lock(&psmouse_mutex);
1508 * If this is a pass-through port deactivate parent so the device
1509 * connected to this port can be successfully identified
1511 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1512 parent = serio_get_drvdata(serio->parent);
1513 psmouse_deactivate(parent);
1516 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1517 input_dev = input_allocate_device();
1518 if (!psmouse || !input_dev)
1521 ps2_init(&psmouse->ps2dev, serio);
1522 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1523 psmouse->dev = input_dev;
1524 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1526 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1528 serio_set_drvdata(serio, psmouse);
1530 error = serio_open(serio, drv);
1532 goto err_clear_drvdata;
1534 /* give PT device some time to settle down before probing */
1535 if (serio->id.type == SERIO_PS_PSTHRU)
1536 usleep_range(10000, 15000);
1538 if (psmouse_probe(psmouse) < 0) {
1540 goto err_close_serio;
1543 psmouse->rate = psmouse_rate;
1544 psmouse->resolution = psmouse_resolution;
1545 psmouse->resetafter = psmouse_resetafter;
1546 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1547 psmouse->smartscroll = psmouse_smartscroll;
1549 psmouse_switch_protocol(psmouse, NULL);
1551 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1552 psmouse_initialize(psmouse);
1554 error = input_register_device(psmouse->dev);
1556 goto err_protocol_disconnect;
1558 if (parent && parent->pt_activate)
1559 parent->pt_activate(parent);
1561 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1563 goto err_pt_deactivate;
1565 psmouse_activate(psmouse);
1568 /* If this is a pass-through port the parent needs to be re-activated */
1570 psmouse_activate(parent);
1572 mutex_unlock(&psmouse_mutex);
1576 if (parent && parent->pt_deactivate)
1577 parent->pt_deactivate(parent);
1578 input_unregister_device(psmouse->dev);
1579 input_dev = NULL; /* so we don't try to free it below */
1580 err_protocol_disconnect:
1581 if (psmouse->disconnect)
1582 psmouse->disconnect(psmouse);
1583 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1587 serio_set_drvdata(serio, NULL);
1589 input_free_device(input_dev);
1596 static int psmouse_reconnect(struct serio *serio)
1598 struct psmouse *psmouse = serio_get_drvdata(serio);
1599 struct psmouse *parent = NULL;
1603 mutex_lock(&psmouse_mutex);
1605 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1606 parent = serio_get_drvdata(serio->parent);
1607 psmouse_deactivate(parent);
1610 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1612 if (psmouse->reconnect) {
1613 if (psmouse->reconnect(psmouse))
1616 psmouse_reset(psmouse);
1618 if (psmouse_probe(psmouse) < 0)
1621 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1622 if (psmouse->type != type)
1627 * OK, the device type (and capabilities) match the old one,
1628 * we can continue using it, complete initialization
1630 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1632 psmouse_initialize(psmouse);
1634 if (parent && parent->pt_activate)
1635 parent->pt_activate(parent);
1637 psmouse_activate(psmouse);
1641 /* If this is a pass-through port the parent waits to be activated */
1643 psmouse_activate(parent);
1645 mutex_unlock(&psmouse_mutex);
1649 static struct serio_device_id psmouse_serio_ids[] = {
1657 .type = SERIO_PS_PSTHRU,
1665 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1667 static struct serio_driver psmouse_drv = {
1671 .description = DRIVER_DESC,
1672 .id_table = psmouse_serio_ids,
1673 .interrupt = psmouse_interrupt,
1674 .connect = psmouse_connect,
1675 .reconnect = psmouse_reconnect,
1676 .disconnect = psmouse_disconnect,
1677 .cleanup = psmouse_cleanup,
1680 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1683 struct serio *serio = to_serio_port(dev);
1684 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1685 struct psmouse *psmouse;
1687 psmouse = serio_get_drvdata(serio);
1689 return attr->show(psmouse, attr->data, buf);
1692 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1693 const char *buf, size_t count)
1695 struct serio *serio = to_serio_port(dev);
1696 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1697 struct psmouse *psmouse, *parent = NULL;
1700 retval = mutex_lock_interruptible(&psmouse_mutex);
1704 psmouse = serio_get_drvdata(serio);
1706 if (attr->protect) {
1707 if (psmouse->state == PSMOUSE_IGNORE) {
1712 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1713 parent = serio_get_drvdata(serio->parent);
1714 psmouse_deactivate(parent);
1717 psmouse_deactivate(psmouse);
1720 retval = attr->set(psmouse, attr->data, buf, count);
1722 if (attr->protect) {
1723 if (retval != -ENODEV)
1724 psmouse_activate(psmouse);
1727 psmouse_activate(parent);
1731 mutex_unlock(&psmouse_mutex);
1736 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1738 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1740 return sprintf(buf, "%u\n", *field);
1743 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1745 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1749 err = kstrtouint(buf, 10, &value);
1758 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1760 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1763 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1765 struct serio *serio = psmouse->ps2dev.serio;
1766 struct psmouse *parent = NULL;
1767 struct input_dev *old_dev, *new_dev;
1768 const struct psmouse_protocol *proto, *old_proto;
1772 proto = psmouse_protocol_by_name(buf, count);
1776 if (psmouse->type == proto->type)
1779 new_dev = input_allocate_device();
1783 while (!list_empty(&serio->children)) {
1785 psmouse_warn(psmouse,
1786 "failed to destroy children ports, protocol change aborted.\n");
1787 input_free_device(new_dev);
1791 mutex_unlock(&psmouse_mutex);
1792 serio_unregister_child_port(serio);
1793 mutex_lock(&psmouse_mutex);
1795 if (serio->drv != &psmouse_drv) {
1796 input_free_device(new_dev);
1800 if (psmouse->type == proto->type) {
1801 input_free_device(new_dev);
1802 return count; /* switched by other thread */
1806 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1807 parent = serio_get_drvdata(serio->parent);
1808 if (parent->pt_deactivate)
1809 parent->pt_deactivate(parent);
1812 old_dev = psmouse->dev;
1813 old_proto = psmouse_protocol_by_type(psmouse->type);
1815 if (psmouse->disconnect)
1816 psmouse->disconnect(psmouse);
1818 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1820 psmouse->dev = new_dev;
1821 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1823 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1824 psmouse_reset(psmouse);
1825 /* default to PSMOUSE_PS2 */
1826 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1829 psmouse_initialize(psmouse);
1830 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1832 error = input_register_device(psmouse->dev);
1834 if (psmouse->disconnect)
1835 psmouse->disconnect(psmouse);
1837 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1838 input_free_device(new_dev);
1839 psmouse->dev = old_dev;
1840 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1841 psmouse_switch_protocol(psmouse, old_proto);
1842 psmouse_initialize(psmouse);
1843 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1848 input_unregister_device(old_dev);
1850 if (parent && parent->pt_activate)
1851 parent->pt_activate(parent);
1856 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1861 err = kstrtouint(buf, 10, &value);
1865 psmouse->set_rate(psmouse, value);
1869 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1874 err = kstrtouint(buf, 10, &value);
1878 psmouse->set_resolution(psmouse, value);
1883 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1885 const struct psmouse_protocol *proto;
1890 proto = psmouse_protocol_by_name(val, strlen(val));
1892 if (!proto || !proto->maxproto)
1895 *((unsigned int *)kp->arg) = proto->type;
1900 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1902 int type = *((unsigned int *)kp->arg);
1904 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1907 static int __init psmouse_init(void)
1911 lifebook_module_init();
1912 synaptics_module_init();
1915 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
1916 if (!kpsmoused_wq) {
1917 pr_err("failed to create kpsmoused workqueue\n");
1921 err = serio_register_driver(&psmouse_drv);
1923 destroy_workqueue(kpsmoused_wq);
1928 static void __exit psmouse_exit(void)
1930 serio_unregister_driver(&psmouse_drv);
1931 destroy_workqueue(kpsmoused_wq);
1934 module_init(psmouse_init);
1935 module_exit(psmouse_exit);