1 // SPDX-License-Identifier: GPL-2.0-only
5 * Copyright (c) 1999-2002 Vojtech Pavlik
6 * Copyright (c) 2003-2004 Dmitry Torokhov
10 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
11 #define psmouse_fmt(fmt) fmt
13 #include <linux/bitops.h>
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/slab.h>
17 #include <linux/interrupt.h>
18 #include <linux/input.h>
19 #include <linux/serio.h>
20 #include <linux/init.h>
21 #include <linux/libps2.h>
22 #include <linux/mutex.h>
23 #include <linux/types.h>
26 #include "synaptics.h"
27 #include "logips2pp.h"
31 #include "trackpoint.h"
32 #include "touchkit_ps2.h"
35 #include "cypress_ps2.h"
36 #include "focaltech.h"
40 #define DRIVER_DESC "PS/2 mouse driver"
42 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE("GPL");
46 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
47 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
48 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
49 static const struct kernel_param_ops param_ops_proto_abbrev = {
50 .set = psmouse_set_maxproto,
51 .get = psmouse_get_maxproto,
53 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
54 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
55 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
57 static unsigned int psmouse_resolution = 200;
58 module_param_named(resolution, psmouse_resolution, uint, 0644);
59 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
61 static unsigned int psmouse_rate = 100;
62 module_param_named(rate, psmouse_rate, uint, 0644);
63 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
65 static bool psmouse_smartscroll = true;
66 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
67 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
69 static bool psmouse_a4tech_2wheels;
70 module_param_named(a4tech_workaround, psmouse_a4tech_2wheels, bool, 0644);
71 MODULE_PARM_DESC(a4tech_workaround, "A4Tech second scroll wheel workaround, 1 = enabled, 0 = disabled (default).");
73 static unsigned int psmouse_resetafter = 5;
74 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
75 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
77 static unsigned int psmouse_resync_time;
78 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
79 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
81 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
83 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
84 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
85 (void *) offsetof(struct psmouse, rate),
86 psmouse_show_int_attr, psmouse_attr_set_rate);
87 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
88 (void *) offsetof(struct psmouse, resolution),
89 psmouse_show_int_attr, psmouse_attr_set_resolution);
90 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
91 (void *) offsetof(struct psmouse, resetafter),
92 psmouse_show_int_attr, psmouse_set_int_attr);
93 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
94 (void *) offsetof(struct psmouse, resync_time),
95 psmouse_show_int_attr, psmouse_set_int_attr);
97 static struct attribute *psmouse_dev_attrs[] = {
98 &psmouse_attr_protocol.dattr.attr,
99 &psmouse_attr_rate.dattr.attr,
100 &psmouse_attr_resolution.dattr.attr,
101 &psmouse_attr_resetafter.dattr.attr,
102 &psmouse_attr_resync_time.dattr.attr,
106 ATTRIBUTE_GROUPS(psmouse_dev);
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 void psmouse_report_standard_buttons(struct input_dev *dev, u8 buttons)
121 input_report_key(dev, BTN_LEFT, buttons & BIT(0));
122 input_report_key(dev, BTN_MIDDLE, buttons & BIT(2));
123 input_report_key(dev, BTN_RIGHT, buttons & BIT(1));
126 void psmouse_report_standard_motion(struct input_dev *dev, u8 *packet)
130 x = packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0;
131 y = packet[2] ? packet[2] - ((packet[0] << 3) & 0x100) : 0;
133 input_report_rel(dev, REL_X, x);
134 input_report_rel(dev, REL_Y, -y);
137 void psmouse_report_standard_packet(struct input_dev *dev, u8 *packet)
139 psmouse_report_standard_buttons(dev, packet[0]);
140 psmouse_report_standard_motion(dev, packet);
144 * psmouse_process_byte() analyzes the PS/2 data stream and reports
145 * relevant events to the input module once full packet has arrived.
147 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
149 struct input_dev *dev = psmouse->dev;
150 u8 *packet = psmouse->packet;
153 if (psmouse->pktcnt < psmouse->pktsize)
154 return PSMOUSE_GOOD_DATA;
156 /* Full packet accumulated, process it */
158 switch (psmouse->protocol->type) {
160 /* IntelliMouse has scroll wheel */
161 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
165 /* Scroll wheel and buttons on IntelliMouse Explorer */
166 switch (packet[3] & 0xC0) {
167 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
168 input_report_rel(dev, REL_WHEEL,
169 -sign_extend32(packet[3], 5));
171 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
172 input_report_rel(dev, REL_HWHEEL,
173 -sign_extend32(packet[3], 5));
177 wheel = sign_extend32(packet[3], 3);
180 * Some A4Tech mice have two scroll wheels, with first
181 * one reporting +/-1 in the lower nibble, and second
182 * one reporting +/-2.
184 if (psmouse_a4tech_2wheels && abs(wheel) > 1)
185 input_report_rel(dev, REL_HWHEEL, wheel / 2);
187 input_report_rel(dev, REL_WHEEL, -wheel);
189 input_report_key(dev, BTN_SIDE, packet[3] & BIT(4));
190 input_report_key(dev, BTN_EXTRA, packet[3] & BIT(5));
196 /* Report scroll buttons on NetMice */
197 input_report_rel(dev, REL_WHEEL, -(s8) packet[3]);
199 /* Extra buttons on Genius NewNet 3D */
200 input_report_key(dev, BTN_SIDE, packet[0] & BIT(6));
201 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(7));
204 case PSMOUSE_THINKPS:
205 /* Extra button on ThinkingMouse */
206 input_report_key(dev, BTN_EXTRA, packet[0] & BIT(3));
209 * Without this bit of weirdness moving up gives wildly
212 packet[1] |= (packet[0] & 0x40) << 1;
215 case PSMOUSE_CORTRON:
217 * Cortron PS2 Trackball reports SIDE button in the
218 * 4th bit of the first byte.
220 input_report_key(dev, BTN_SIDE, packet[0] & BIT(3));
228 /* Generic PS/2 Mouse */
229 packet[0] |= psmouse->extra_buttons;
230 psmouse_report_standard_packet(dev, packet);
234 return PSMOUSE_FULL_PACKET;
237 void psmouse_queue_work(struct psmouse *psmouse, struct delayed_work *work,
240 queue_delayed_work(kpsmoused_wq, work, delay);
244 * __psmouse_set_state() sets new psmouse state and resets all flags.
246 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
248 psmouse->state = new_state;
249 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
250 psmouse->ps2dev.flags = 0;
251 psmouse->last = jiffies;
255 * psmouse_set_state() sets new psmouse state and resets all flags and
256 * counters while holding serio lock so fighting with interrupt handler
259 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
261 serio_pause_rx(psmouse->ps2dev.serio);
262 __psmouse_set_state(psmouse, new_state);
263 serio_continue_rx(psmouse->ps2dev.serio);
267 * psmouse_handle_byte() processes one byte of the input data stream
268 * by calling corresponding protocol handler.
270 static int psmouse_handle_byte(struct psmouse *psmouse)
272 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
275 case PSMOUSE_BAD_DATA:
276 if (psmouse->state == PSMOUSE_ACTIVATED) {
277 psmouse_warn(psmouse,
278 "%s at %s lost sync at byte %d\n",
279 psmouse->name, psmouse->phys,
281 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
282 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
283 psmouse_notice(psmouse,
284 "issuing reconnect request\n");
285 serio_reconnect(psmouse->ps2dev.serio);
292 case PSMOUSE_FULL_PACKET:
294 if (psmouse->out_of_sync_cnt) {
295 psmouse->out_of_sync_cnt = 0;
296 psmouse_notice(psmouse,
297 "%s at %s - driver resynced.\n",
298 psmouse->name, psmouse->phys);
302 case PSMOUSE_GOOD_DATA:
308 static void psmouse_handle_oob_data(struct psmouse *psmouse, u8 data)
310 switch (psmouse->oob_data_type) {
311 case PSMOUSE_OOB_NONE:
312 psmouse->oob_data_type = data;
315 case PSMOUSE_OOB_EXTRA_BTNS:
316 psmouse_report_standard_buttons(psmouse->dev, data);
317 input_sync(psmouse->dev);
319 psmouse->extra_buttons = data;
320 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
324 psmouse_warn(psmouse,
325 "unknown OOB_DATA type: 0x%02x\n",
326 psmouse->oob_data_type);
327 psmouse->oob_data_type = PSMOUSE_OOB_NONE;
333 * psmouse_interrupt() handles incoming characters, either passing them
334 * for normal processing or gathering them as command response.
336 static irqreturn_t psmouse_interrupt(struct serio *serio,
337 u8 data, unsigned int flags)
339 struct psmouse *psmouse = serio_get_drvdata(serio);
341 if (psmouse->state == PSMOUSE_IGNORE)
344 if (unlikely((flags & SERIO_TIMEOUT) ||
345 ((flags & SERIO_PARITY) &&
346 !psmouse->protocol->ignore_parity))) {
348 if (psmouse->state == PSMOUSE_ACTIVATED)
349 psmouse_warn(psmouse,
350 "bad data from KBC -%s%s\n",
351 flags & SERIO_TIMEOUT ? " timeout" : "",
352 flags & SERIO_PARITY ? " bad parity" : "");
353 ps2_cmd_aborted(&psmouse->ps2dev);
357 if (flags & SERIO_OOB_DATA) {
358 psmouse_handle_oob_data(psmouse, data);
362 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
363 if (ps2_handle_ack(&psmouse->ps2dev, data))
366 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
367 if (ps2_handle_response(&psmouse->ps2dev, data))
370 pm_wakeup_event(&serio->dev, 0);
372 if (psmouse->state <= PSMOUSE_RESYNCING)
375 if (psmouse->state == PSMOUSE_ACTIVATED &&
376 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
377 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
378 psmouse->name, psmouse->phys, psmouse->pktcnt);
379 psmouse->badbyte = psmouse->packet[0];
380 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
381 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
385 psmouse->packet[psmouse->pktcnt++] = data;
387 /* Check if this is a new device announcement (0xAA 0x00) */
388 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
389 if (psmouse->pktcnt == 1) {
390 psmouse->last = jiffies;
394 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
395 (psmouse->protocol->type == PSMOUSE_HGPK &&
396 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
397 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
398 serio_reconnect(serio);
402 /* Not a new device, try processing first byte normally */
404 if (psmouse_handle_byte(psmouse))
407 psmouse->packet[psmouse->pktcnt++] = data;
411 * See if we need to force resync because mouse was idle for
414 if (psmouse->state == PSMOUSE_ACTIVATED &&
415 psmouse->pktcnt == 1 && psmouse->resync_time &&
416 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
417 psmouse->badbyte = psmouse->packet[0];
418 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
419 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
423 psmouse->last = jiffies;
424 psmouse_handle_byte(psmouse);
431 * psmouse_reset() resets the mouse into power-on state.
433 int psmouse_reset(struct psmouse *psmouse)
438 error = ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT);
442 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
449 * Here we set the mouse resolution.
451 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
453 static const u8 params[] = { 0, 1, 2, 2, 3 };
456 if (resolution == 0 || resolution > 200)
459 p = params[resolution / 50];
460 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
461 psmouse->resolution = 25 << p;
465 * Here we set the mouse report rate.
467 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
469 static const u8 rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
473 while (rates[i] > rate)
476 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
481 * Here we set the mouse scaling.
483 static void psmouse_set_scale(struct psmouse *psmouse, enum psmouse_scale scale)
485 ps2_command(&psmouse->ps2dev, NULL,
486 scale == PSMOUSE_SCALE21 ? PSMOUSE_CMD_SETSCALE21 :
487 PSMOUSE_CMD_SETSCALE11);
491 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
493 static int psmouse_poll(struct psmouse *psmouse)
495 return ps2_command(&psmouse->ps2dev, psmouse->packet,
496 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
499 static bool psmouse_check_pnp_id(const char *id, const char * const ids[])
503 for (i = 0; ids[i]; i++)
504 if (!strcasecmp(id, ids[i]))
511 * psmouse_matches_pnp_id - check if psmouse matches one of the passed in ids.
513 bool psmouse_matches_pnp_id(struct psmouse *psmouse, const char * const ids[])
515 struct serio *serio = psmouse->ps2dev.serio;
516 char *p, *fw_id_copy, *save_ptr;
519 if (strncmp(serio->firmware_id, "PNP: ", 5))
522 fw_id_copy = kstrndup(&serio->firmware_id[5],
523 sizeof(serio->firmware_id) - 5,
528 save_ptr = fw_id_copy;
529 while ((p = strsep(&fw_id_copy, " ")) != NULL) {
530 if (psmouse_check_pnp_id(p, ids)) {
541 * Genius NetMouse magic init.
543 static int genius_detect(struct psmouse *psmouse, bool set_properties)
545 struct ps2dev *ps2dev = &psmouse->ps2dev;
549 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
550 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
551 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
552 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
553 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
555 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
558 if (set_properties) {
559 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
560 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
561 __set_bit(BTN_SIDE, psmouse->dev->keybit);
562 __set_bit(REL_WHEEL, psmouse->dev->relbit);
564 psmouse->vendor = "Genius";
565 psmouse->name = "Mouse";
566 psmouse->pktsize = 4;
573 * IntelliMouse magic init.
575 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
577 struct ps2dev *ps2dev = &psmouse->ps2dev;
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 if (set_properties) {
592 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
593 __set_bit(REL_WHEEL, psmouse->dev->relbit);
595 if (!psmouse->vendor)
596 psmouse->vendor = "Generic";
598 psmouse->name = "Wheel Mouse";
599 psmouse->pktsize = 4;
606 * Try IntelliMouse/Explorer magic init.
608 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
610 struct ps2dev *ps2dev = &psmouse->ps2dev;
613 intellimouse_detect(psmouse, 0);
616 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
618 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
620 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
621 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
626 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
628 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
630 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
632 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
634 if (set_properties) {
635 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
636 __set_bit(REL_WHEEL, psmouse->dev->relbit);
637 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
638 __set_bit(BTN_SIDE, psmouse->dev->keybit);
639 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
641 if (!psmouse->vendor)
642 psmouse->vendor = "Generic";
644 psmouse->name = "Explorer Mouse";
645 psmouse->pktsize = 4;
652 * Kensington ThinkingMouse / ExpertMouse magic init.
654 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
656 struct ps2dev *ps2dev = &psmouse->ps2dev;
658 static const u8 seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
662 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
664 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
665 for (i = 0; i < ARRAY_SIZE(seq); i++) {
667 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
669 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
674 if (set_properties) {
675 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
676 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
678 psmouse->vendor = "Kensington";
679 psmouse->name = "ThinkingMouse";
686 * Bare PS/2 protocol "detection". Always succeeds.
688 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
690 if (set_properties) {
691 if (!psmouse->vendor)
692 psmouse->vendor = "Generic";
694 psmouse->name = "Mouse";
697 * We have no way of figuring true number of buttons so let's
698 * assume that the device has 3.
700 input_set_capability(psmouse->dev, EV_KEY, BTN_MIDDLE);
707 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
708 * must be forced by sysfs protocol writing.
710 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
712 if (set_properties) {
713 psmouse->vendor = "Cortron";
714 psmouse->name = "PS/2 Trackball";
716 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
717 __set_bit(BTN_SIDE, psmouse->dev->keybit);
723 static const struct psmouse_protocol psmouse_protocols[] = {
729 .ignore_parity = true,
730 .detect = ps2bare_detect,
731 .try_passthru = true,
733 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
735 .type = PSMOUSE_PS2PP,
738 .detect = ps2pp_detect,
742 .type = PSMOUSE_THINKPS,
745 .detect = thinking_detect,
747 #ifdef CONFIG_MOUSE_PS2_CYPRESS
749 .type = PSMOUSE_CYPRESS,
752 .detect = cypress_detect,
753 .init = cypress_init,
757 .type = PSMOUSE_GENPS,
760 .detect = genius_detect,
763 .type = PSMOUSE_IMPS,
767 .ignore_parity = true,
768 .detect = intellimouse_detect,
769 .try_passthru = true,
772 .type = PSMOUSE_IMEX,
776 .ignore_parity = true,
777 .detect = im_explorer_detect,
778 .try_passthru = true,
780 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
782 .type = PSMOUSE_SYNAPTICS,
784 .alias = "synaptics",
785 .detect = synaptics_detect,
786 .init = synaptics_init_absolute,
789 .type = PSMOUSE_SYNAPTICS_RELATIVE,
790 .name = "SynRelPS/2",
791 .alias = "synaptics-relative",
792 .detect = synaptics_detect,
793 .init = synaptics_init_relative,
796 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS
798 .type = PSMOUSE_SYNAPTICS_SMBUS,
800 .alias = "synaptics-smbus",
801 .detect = synaptics_detect,
802 .init = synaptics_init_smbus,
803 .smbus_companion = true,
806 #ifdef CONFIG_MOUSE_PS2_ALPS
808 .type = PSMOUSE_ALPS,
811 .detect = alps_detect,
815 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
817 .type = PSMOUSE_LIFEBOOK,
820 .detect = lifebook_detect,
821 .init = lifebook_init,
824 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
826 .type = PSMOUSE_TRACKPOINT,
828 .alias = "trackpoint",
829 .detect = trackpoint_detect,
830 .try_passthru = true,
833 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
835 .type = PSMOUSE_TOUCHKIT_PS2,
836 .name = "touchkitPS/2",
838 .detect = touchkit_ps2_detect,
841 #ifdef CONFIG_MOUSE_PS2_OLPC
843 .type = PSMOUSE_HGPK,
846 .detect = hgpk_detect,
849 #ifdef CONFIG_MOUSE_PS2_ELANTECH
851 .type = PSMOUSE_ELANTECH,
854 .detect = elantech_detect,
855 .init = elantech_init_ps2,
858 #ifdef CONFIG_MOUSE_PS2_ELANTECH_SMBUS
860 .type = PSMOUSE_ELANTECH_SMBUS,
862 .alias = "elantech-smbus",
863 .detect = elantech_detect,
864 .init = elantech_init_smbus,
865 .smbus_companion = true,
868 #ifdef CONFIG_MOUSE_PS2_SENTELIC
873 .detect = fsp_detect,
878 .type = PSMOUSE_CORTRON,
879 .name = "CortronPS/2",
881 .detect = cortron_detect,
883 #ifdef CONFIG_MOUSE_PS2_FOCALTECH
885 .type = PSMOUSE_FOCALTECH,
886 .name = "FocalTechPS/2",
887 .alias = "focaltech",
888 .detect = focaltech_detect,
889 .init = focaltech_init,
892 #ifdef CONFIG_MOUSE_PS2_VMMOUSE
894 .type = PSMOUSE_VMMOUSE,
895 .name = VMMOUSE_PSNAME,
897 .detect = vmmouse_detect,
898 .init = vmmouse_init,
901 #ifdef CONFIG_MOUSE_PS2_BYD
906 .detect = byd_detect,
911 .type = PSMOUSE_AUTO,
918 static const struct psmouse_protocol *__psmouse_protocol_by_type(enum psmouse_type type)
922 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
923 if (psmouse_protocols[i].type == type)
924 return &psmouse_protocols[i];
929 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
931 const struct psmouse_protocol *proto;
933 proto = __psmouse_protocol_by_type(type);
938 return &psmouse_protocols[0];
941 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
943 const struct psmouse_protocol *p;
946 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
947 p = &psmouse_protocols[i];
949 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
950 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
951 return &psmouse_protocols[i];
958 * Apply default settings to the psmouse structure. Most of them will
959 * be overridden by individual protocol initialization routines.
961 static void psmouse_apply_defaults(struct psmouse *psmouse)
963 struct input_dev *input_dev = psmouse->dev;
965 bitmap_zero(input_dev->evbit, EV_CNT);
966 bitmap_zero(input_dev->keybit, KEY_CNT);
967 bitmap_zero(input_dev->relbit, REL_CNT);
968 bitmap_zero(input_dev->absbit, ABS_CNT);
969 bitmap_zero(input_dev->mscbit, MSC_CNT);
971 input_set_capability(input_dev, EV_KEY, BTN_LEFT);
972 input_set_capability(input_dev, EV_KEY, BTN_RIGHT);
974 input_set_capability(input_dev, EV_REL, REL_X);
975 input_set_capability(input_dev, EV_REL, REL_Y);
977 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
979 psmouse->protocol = &psmouse_protocols[0];
981 psmouse->set_rate = psmouse_set_rate;
982 psmouse->set_resolution = psmouse_set_resolution;
983 psmouse->set_scale = psmouse_set_scale;
984 psmouse->poll = psmouse_poll;
985 psmouse->protocol_handler = psmouse_process_byte;
986 psmouse->pktsize = 3;
987 psmouse->reconnect = NULL;
988 psmouse->fast_reconnect = NULL;
989 psmouse->disconnect = NULL;
990 psmouse->cleanup = NULL;
991 psmouse->pt_activate = NULL;
992 psmouse->pt_deactivate = NULL;
995 static bool psmouse_do_detect(int (*detect)(struct psmouse *, bool),
996 struct psmouse *psmouse, bool allow_passthrough,
999 if (psmouse->ps2dev.serio->id.type == SERIO_PS_PSTHRU &&
1000 !allow_passthrough) {
1005 psmouse_apply_defaults(psmouse);
1007 return detect(psmouse, set_properties) == 0;
1010 static bool psmouse_try_protocol(struct psmouse *psmouse,
1011 enum psmouse_type type,
1012 unsigned int *max_proto,
1013 bool set_properties, bool init_allowed)
1015 const struct psmouse_protocol *proto;
1017 proto = __psmouse_protocol_by_type(type);
1021 if (!psmouse_do_detect(proto->detect, psmouse, proto->try_passthru,
1025 if (set_properties && proto->init && init_allowed) {
1026 if (proto->init(psmouse) != 0) {
1028 * We detected device, but init failed. Adjust
1029 * max_proto so we only try standard protocols.
1031 if (*max_proto > PSMOUSE_IMEX)
1032 *max_proto = PSMOUSE_IMEX;
1042 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
1043 * the mouse may have.
1045 static int psmouse_extensions(struct psmouse *psmouse,
1046 unsigned int max_proto, bool set_properties)
1048 bool synaptics_hardware = false;
1052 * Always check for focaltech, this is safe as it uses pnp-id
1055 if (psmouse_do_detect(focaltech_detect,
1056 psmouse, false, set_properties)) {
1057 if (max_proto > PSMOUSE_IMEX &&
1058 IS_ENABLED(CONFIG_MOUSE_PS2_FOCALTECH) &&
1059 (!set_properties || focaltech_init(psmouse) == 0)) {
1060 return PSMOUSE_FOCALTECH;
1063 * Restrict psmouse_max_proto so that psmouse_initialize()
1064 * does not try to reset rate and resolution, because even
1065 * that upsets the device.
1066 * This also causes us to basically fall through to basic
1067 * protocol detection, where we fully reset the mouse,
1068 * and set it up as bare PS/2 protocol device.
1070 psmouse_max_proto = max_proto = PSMOUSE_PS2;
1074 * We always check for LifeBook because it does not disturb mouse
1075 * (it only checks DMI information).
1077 if (psmouse_try_protocol(psmouse, PSMOUSE_LIFEBOOK, &max_proto,
1078 set_properties, max_proto > PSMOUSE_IMEX))
1079 return PSMOUSE_LIFEBOOK;
1081 if (psmouse_try_protocol(psmouse, PSMOUSE_VMMOUSE, &max_proto,
1082 set_properties, max_proto > PSMOUSE_IMEX))
1083 return PSMOUSE_VMMOUSE;
1086 * Try Kensington ThinkingMouse (we try first, because Synaptics
1087 * probe upsets the ThinkingMouse).
1089 if (max_proto > PSMOUSE_IMEX &&
1090 psmouse_try_protocol(psmouse, PSMOUSE_THINKPS, &max_proto,
1091 set_properties, true)) {
1092 return PSMOUSE_THINKPS;
1096 * Try Synaptics TouchPad. Note that probing is done even if
1097 * Synaptics protocol support is disabled in config - we need to
1098 * know if it is Synaptics so we can reset it properly after
1099 * probing for IntelliMouse.
1101 if (max_proto > PSMOUSE_PS2 &&
1102 psmouse_do_detect(synaptics_detect,
1103 psmouse, false, set_properties)) {
1104 synaptics_hardware = true;
1106 if (max_proto > PSMOUSE_IMEX) {
1108 * Try activating protocol, but check if support is
1109 * enabled first, since we try detecting Synaptics
1110 * even when protocol is disabled.
1112 if (IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS) ||
1113 IS_ENABLED(CONFIG_MOUSE_PS2_SYNAPTICS_SMBUS)) {
1114 if (!set_properties)
1115 return PSMOUSE_SYNAPTICS;
1117 ret = synaptics_init(psmouse);
1123 * Some Synaptics touchpads can emulate extended
1124 * protocols (like IMPS/2). Unfortunately
1125 * Logitech/Genius probes confuse some firmware
1126 * versions so we'll have to skip them.
1128 max_proto = PSMOUSE_IMEX;
1132 * Make sure that touchpad is in relative mode, gestures
1133 * (taps) are enabled.
1135 synaptics_reset(psmouse);
1139 * Try Cypress Trackpad. We must try it before Finger Sensing Pad
1140 * because Finger Sensing Pad probe upsets some modules of Cypress
1143 if (max_proto > PSMOUSE_IMEX &&
1144 psmouse_try_protocol(psmouse, PSMOUSE_CYPRESS, &max_proto,
1145 set_properties, true)) {
1146 return PSMOUSE_CYPRESS;
1149 /* Try ALPS TouchPad */
1150 if (max_proto > PSMOUSE_IMEX) {
1151 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1152 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS,
1153 &max_proto, set_properties, true))
1154 return PSMOUSE_ALPS;
1157 /* Try OLPC HGPK touchpad */
1158 if (max_proto > PSMOUSE_IMEX &&
1159 psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto,
1160 set_properties, true)) {
1161 return PSMOUSE_HGPK;
1164 /* Try Elantech touchpad */
1165 if (max_proto > PSMOUSE_IMEX &&
1166 psmouse_try_protocol(psmouse, PSMOUSE_ELANTECH,
1167 &max_proto, set_properties, false)) {
1168 if (!set_properties)
1169 return PSMOUSE_ELANTECH;
1171 ret = elantech_init(psmouse);
1176 if (max_proto > PSMOUSE_IMEX) {
1177 if (psmouse_try_protocol(psmouse, PSMOUSE_GENPS,
1178 &max_proto, set_properties, true))
1179 return PSMOUSE_GENPS;
1181 if (psmouse_try_protocol(psmouse, PSMOUSE_PS2PP,
1182 &max_proto, set_properties, true))
1183 return PSMOUSE_PS2PP;
1185 if (psmouse_try_protocol(psmouse, PSMOUSE_TRACKPOINT,
1186 &max_proto, set_properties, true))
1187 return PSMOUSE_TRACKPOINT;
1189 if (psmouse_try_protocol(psmouse, PSMOUSE_TOUCHKIT_PS2,
1190 &max_proto, set_properties, true))
1191 return PSMOUSE_TOUCHKIT_PS2;
1195 * Try Finger Sensing Pad. We do it here because its probe upsets
1196 * Trackpoint devices (causing TP_READ_ID command to time out).
1198 if (max_proto > PSMOUSE_IMEX &&
1199 psmouse_try_protocol(psmouse, PSMOUSE_FSP,
1200 &max_proto, set_properties, true)) {
1205 * Reset to defaults in case the device got confused by extended
1206 * protocol probes. Note that we follow up with full reset because
1207 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
1209 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1210 psmouse_reset(psmouse);
1212 if (max_proto >= PSMOUSE_IMEX &&
1213 psmouse_try_protocol(psmouse, PSMOUSE_IMEX,
1214 &max_proto, set_properties, true)) {
1215 return PSMOUSE_IMEX;
1218 if (max_proto >= PSMOUSE_IMPS &&
1219 psmouse_try_protocol(psmouse, PSMOUSE_IMPS,
1220 &max_proto, set_properties, true)) {
1221 return PSMOUSE_IMPS;
1225 * Okay, all failed, we have a standard mouse here. The number of
1226 * the buttons is still a question, though. We assume 3.
1228 psmouse_try_protocol(psmouse, PSMOUSE_PS2,
1229 &max_proto, set_properties, true);
1231 if (synaptics_hardware) {
1233 * We detected Synaptics hardware but it did not respond to
1234 * IMPS/2 probes. We need to reset the touchpad because if
1235 * there is a track point on the pass through port it could
1236 * get disabled while probing for protocol extensions.
1238 psmouse_reset(psmouse);
1245 * psmouse_probe() probes for a PS/2 mouse.
1247 static int psmouse_probe(struct psmouse *psmouse)
1249 struct ps2dev *ps2dev = &psmouse->ps2dev;
1254 * First, we check if it's a mouse. It should send 0x00 or 0x03 in
1255 * case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1256 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and
1257 * subsequent ID queries, probably due to a firmware bug.
1260 error = ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
1264 if (param[0] != 0x00 && param[0] != 0x03 &&
1265 param[0] != 0x04 && param[0] != 0xff)
1269 * Then we reset and disable the mouse so that it doesn't generate
1272 error = ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1274 psmouse_warn(psmouse, "Failed to reset mouse on %s: %d\n",
1275 ps2dev->serio->phys, error);
1281 * psmouse_initialize() initializes the mouse to a sane state.
1283 static void psmouse_initialize(struct psmouse *psmouse)
1286 * We set the mouse report rate, resolution and scaling.
1288 if (psmouse_max_proto != PSMOUSE_PS2) {
1289 psmouse->set_rate(psmouse, psmouse->rate);
1290 psmouse->set_resolution(psmouse, psmouse->resolution);
1291 psmouse->set_scale(psmouse, PSMOUSE_SCALE11);
1296 * psmouse_activate() enables the mouse so that we get motion reports from it.
1298 int psmouse_activate(struct psmouse *psmouse)
1300 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1301 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1302 psmouse->ps2dev.serio->phys);
1306 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1311 * psmouse_deactivate() puts the mouse into poll mode so that we don't get
1312 * motion reports from it unless we explicitly request it.
1314 int psmouse_deactivate(struct psmouse *psmouse)
1318 error = ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE);
1320 psmouse_warn(psmouse, "Failed to deactivate mouse on %s: %d\n",
1321 psmouse->ps2dev.serio->phys, error);
1325 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1330 * psmouse_resync() attempts to re-validate current protocol.
1332 static void psmouse_resync(struct work_struct *work)
1334 struct psmouse *parent = NULL, *psmouse =
1335 container_of(work, struct psmouse, resync_work.work);
1336 struct serio *serio = psmouse->ps2dev.serio;
1337 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1338 bool failed = false, enabled = false;
1341 mutex_lock(&psmouse_mutex);
1343 if (psmouse->state != PSMOUSE_RESYNCING)
1346 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1347 parent = serio_get_drvdata(serio->parent);
1348 psmouse_deactivate(parent);
1352 * Some mice don't ACK commands sent while they are in the middle of
1353 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1354 * instead of ps2_command() which would wait for 200ms for an ACK
1355 * that may never come.
1356 * As an additional quirk ALPS touchpads may not only forget to ACK
1357 * disable command but will stop reporting taps, so if we see that
1358 * mouse at least once ACKs disable we will do full reconnect if ACK
1361 psmouse->num_resyncs++;
1363 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1364 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1367 psmouse->acks_disable_command = true;
1370 * Poll the mouse. If it was reset the packet will be shorter than
1371 * psmouse->pktsize and ps2_command will fail. We do not expect and
1372 * do not handle scenario when mouse "upgrades" its protocol while
1373 * disconnected since it would require additional delay. If we ever
1374 * see a mouse that does it we'll adjust the code.
1377 if (psmouse->poll(psmouse))
1380 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1381 for (i = 0; i < psmouse->pktsize; i++) {
1383 rc = psmouse->protocol_handler(psmouse);
1384 if (rc != PSMOUSE_GOOD_DATA)
1387 if (rc != PSMOUSE_FULL_PACKET)
1389 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1394 * Now try to enable mouse. We try to do that even if poll failed
1395 * and also repeat our attempts 5 times, otherwise we may be left
1396 * out with disabled mouse.
1398 for (i = 0; i < 5; i++) {
1399 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1407 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1408 psmouse->ps2dev.serio->phys);
1413 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1414 psmouse_info(psmouse,
1415 "resync failed, issuing reconnect request\n");
1416 serio_reconnect(serio);
1418 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1421 psmouse_activate(parent);
1423 mutex_unlock(&psmouse_mutex);
1427 * psmouse_cleanup() resets the mouse into power-on state.
1429 static void psmouse_cleanup(struct serio *serio)
1431 struct psmouse *psmouse = serio_get_drvdata(serio);
1432 struct psmouse *parent = NULL;
1434 mutex_lock(&psmouse_mutex);
1436 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1437 parent = serio_get_drvdata(serio->parent);
1438 psmouse_deactivate(parent);
1441 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1444 * Disable stream mode so cleanup routine can proceed undisturbed.
1446 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1447 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1448 psmouse->ps2dev.serio->phys);
1450 if (psmouse->cleanup)
1451 psmouse->cleanup(psmouse);
1454 * Reset the mouse to defaults (bare PS/2 protocol).
1456 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1459 * Some boxes, such as HP nx7400, get terribly confused if mouse
1460 * is not fully enabled before suspending/shutting down.
1462 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1465 if (parent->pt_deactivate)
1466 parent->pt_deactivate(parent);
1468 psmouse_activate(parent);
1471 mutex_unlock(&psmouse_mutex);
1475 * psmouse_disconnect() closes and frees.
1477 static void psmouse_disconnect(struct serio *serio)
1479 struct psmouse *psmouse = serio_get_drvdata(serio);
1480 struct psmouse *parent = NULL;
1482 mutex_lock(&psmouse_mutex);
1484 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1486 /* make sure we don't have a resync in progress */
1487 mutex_unlock(&psmouse_mutex);
1488 flush_workqueue(kpsmoused_wq);
1489 mutex_lock(&psmouse_mutex);
1491 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1492 parent = serio_get_drvdata(serio->parent);
1493 psmouse_deactivate(parent);
1496 if (psmouse->disconnect)
1497 psmouse->disconnect(psmouse);
1499 if (parent && parent->pt_deactivate)
1500 parent->pt_deactivate(parent);
1502 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1505 serio_set_drvdata(serio, NULL);
1508 input_unregister_device(psmouse->dev);
1513 psmouse_activate(parent);
1515 mutex_unlock(&psmouse_mutex);
1518 static int psmouse_switch_protocol(struct psmouse *psmouse,
1519 const struct psmouse_protocol *proto)
1521 const struct psmouse_protocol *selected_proto;
1522 struct input_dev *input_dev = psmouse->dev;
1523 enum psmouse_type type;
1525 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1527 if (proto && (proto->detect || proto->init)) {
1528 psmouse_apply_defaults(psmouse);
1530 if (proto->detect && proto->detect(psmouse, true) < 0)
1533 if (proto->init && proto->init(psmouse) < 0)
1536 selected_proto = proto;
1538 type = psmouse_extensions(psmouse, psmouse_max_proto, true);
1539 selected_proto = psmouse_protocol_by_type(type);
1542 psmouse->protocol = selected_proto;
1545 * If mouse's packet size is 3 there is no point in polling the
1546 * device in hopes to detect protocol reset - we won't get less
1547 * than 3 bytes response anyhow.
1549 if (psmouse->pktsize == 3)
1550 psmouse->resync_time = 0;
1553 * Some smart KVMs fake response to POLL command returning just
1554 * 3 bytes and messing up our resync logic, so if initial poll
1555 * fails we won't try polling the device anymore. Hopefully
1556 * such KVM will maintain initially selected protocol.
1558 if (psmouse->resync_time && psmouse->poll(psmouse))
1559 psmouse->resync_time = 0;
1561 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1562 selected_proto->name, psmouse->vendor, psmouse->name);
1564 input_dev->name = psmouse->devname;
1565 input_dev->phys = psmouse->phys;
1566 input_dev->id.bustype = BUS_I8042;
1567 input_dev->id.vendor = 0x0002;
1568 input_dev->id.product = psmouse->protocol->type;
1569 input_dev->id.version = psmouse->model;
1575 * psmouse_connect() is a callback from the serio module when
1576 * an unhandled serio port is found.
1578 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1580 struct psmouse *psmouse, *parent = NULL;
1581 struct input_dev *input_dev;
1582 int retval = 0, error = -ENOMEM;
1584 mutex_lock(&psmouse_mutex);
1587 * If this is a pass-through port deactivate parent so the device
1588 * connected to this port can be successfully identified
1590 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1591 parent = serio_get_drvdata(serio->parent);
1592 psmouse_deactivate(parent);
1595 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1596 input_dev = input_allocate_device();
1597 if (!psmouse || !input_dev)
1600 ps2_init(&psmouse->ps2dev, serio);
1601 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1602 psmouse->dev = input_dev;
1603 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1605 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1607 serio_set_drvdata(serio, psmouse);
1609 error = serio_open(serio, drv);
1611 goto err_clear_drvdata;
1613 /* give PT device some time to settle down before probing */
1614 if (serio->id.type == SERIO_PS_PSTHRU)
1615 usleep_range(10000, 15000);
1617 if (psmouse_probe(psmouse) < 0) {
1619 goto err_close_serio;
1622 psmouse->rate = psmouse_rate;
1623 psmouse->resolution = psmouse_resolution;
1624 psmouse->resetafter = psmouse_resetafter;
1625 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1626 psmouse->smartscroll = psmouse_smartscroll;
1628 psmouse_switch_protocol(psmouse, NULL);
1630 if (!psmouse->protocol->smbus_companion) {
1631 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1632 psmouse_initialize(psmouse);
1634 error = input_register_device(input_dev);
1636 goto err_protocol_disconnect;
1638 /* Smbus companion will be reporting events, not us. */
1639 input_free_device(input_dev);
1640 psmouse->dev = input_dev = NULL;
1643 if (parent && parent->pt_activate)
1644 parent->pt_activate(parent);
1647 * PS/2 devices having SMBus companions should stay disabled
1648 * on PS/2 side, in order to have SMBus part operable.
1650 if (!psmouse->protocol->smbus_companion)
1651 psmouse_activate(psmouse);
1654 /* If this is a pass-through port the parent needs to be re-activated */
1656 psmouse_activate(parent);
1658 mutex_unlock(&psmouse_mutex);
1661 err_protocol_disconnect:
1662 if (psmouse->disconnect)
1663 psmouse->disconnect(psmouse);
1664 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1668 serio_set_drvdata(serio, NULL);
1670 input_free_device(input_dev);
1677 static int __psmouse_reconnect(struct serio *serio, bool fast_reconnect)
1679 struct psmouse *psmouse = serio_get_drvdata(serio);
1680 struct psmouse *parent = NULL;
1681 int (*reconnect_handler)(struct psmouse *);
1682 enum psmouse_type type;
1685 mutex_lock(&psmouse_mutex);
1687 if (fast_reconnect) {
1688 reconnect_handler = psmouse->fast_reconnect;
1689 if (!reconnect_handler) {
1694 reconnect_handler = psmouse->reconnect;
1697 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1698 parent = serio_get_drvdata(serio->parent);
1699 psmouse_deactivate(parent);
1702 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1704 if (reconnect_handler) {
1705 if (reconnect_handler(psmouse))
1708 psmouse_reset(psmouse);
1710 if (psmouse_probe(psmouse) < 0)
1713 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1714 if (psmouse->protocol->type != type)
1719 * OK, the device type (and capabilities) match the old one,
1720 * we can continue using it, complete initialization
1722 if (!psmouse->protocol->smbus_companion) {
1723 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1724 psmouse_initialize(psmouse);
1727 if (parent && parent->pt_activate)
1728 parent->pt_activate(parent);
1731 * PS/2 devices having SMBus companions should stay disabled
1732 * on PS/2 side, in order to have SMBus part operable.
1734 if (!psmouse->protocol->smbus_companion)
1735 psmouse_activate(psmouse);
1740 /* If this is a pass-through port the parent waits to be activated */
1742 psmouse_activate(parent);
1745 mutex_unlock(&psmouse_mutex);
1749 static int psmouse_reconnect(struct serio *serio)
1751 return __psmouse_reconnect(serio, false);
1754 static int psmouse_fast_reconnect(struct serio *serio)
1756 return __psmouse_reconnect(serio, true);
1759 static struct serio_device_id psmouse_serio_ids[] = {
1767 .type = SERIO_PS_PSTHRU,
1775 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1777 static struct serio_driver psmouse_drv = {
1780 .dev_groups = psmouse_dev_groups,
1782 .description = DRIVER_DESC,
1783 .id_table = psmouse_serio_ids,
1784 .interrupt = psmouse_interrupt,
1785 .connect = psmouse_connect,
1786 .reconnect = psmouse_reconnect,
1787 .fast_reconnect = psmouse_fast_reconnect,
1788 .disconnect = psmouse_disconnect,
1789 .cleanup = psmouse_cleanup,
1792 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1795 struct serio *serio = to_serio_port(dev);
1796 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1797 struct psmouse *psmouse = serio_get_drvdata(serio);
1799 if (psmouse->protocol->smbus_companion &&
1800 devattr != &psmouse_attr_protocol.dattr)
1803 return attr->show(psmouse, attr->data, buf);
1806 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1807 const char *buf, size_t count)
1809 struct serio *serio = to_serio_port(dev);
1810 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1811 struct psmouse *psmouse, *parent = NULL;
1814 retval = mutex_lock_interruptible(&psmouse_mutex);
1818 psmouse = serio_get_drvdata(serio);
1820 if (psmouse->protocol->smbus_companion &&
1821 devattr != &psmouse_attr_protocol.dattr) {
1826 if (attr->protect) {
1827 if (psmouse->state == PSMOUSE_IGNORE) {
1832 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1833 parent = serio_get_drvdata(serio->parent);
1834 psmouse_deactivate(parent);
1837 if (!psmouse->protocol->smbus_companion)
1838 psmouse_deactivate(psmouse);
1841 retval = attr->set(psmouse, attr->data, buf, count);
1843 if (attr->protect) {
1844 if (retval != -ENODEV && !psmouse->protocol->smbus_companion)
1845 psmouse_activate(psmouse);
1848 psmouse_activate(parent);
1852 mutex_unlock(&psmouse_mutex);
1857 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1859 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1861 return sprintf(buf, "%u\n", *field);
1864 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1866 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1870 err = kstrtouint(buf, 10, &value);
1879 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1881 return sprintf(buf, "%s\n", psmouse->protocol->name);
1884 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1886 struct serio *serio = psmouse->ps2dev.serio;
1887 struct psmouse *parent = NULL;
1888 struct input_dev *old_dev, *new_dev;
1889 const struct psmouse_protocol *proto, *old_proto;
1893 proto = psmouse_protocol_by_name(buf, count);
1897 if (psmouse->protocol == proto)
1900 new_dev = input_allocate_device();
1904 while (!list_empty(&serio->children)) {
1906 psmouse_warn(psmouse,
1907 "failed to destroy children ports, protocol change aborted.\n");
1908 input_free_device(new_dev);
1912 mutex_unlock(&psmouse_mutex);
1913 serio_unregister_child_port(serio);
1914 mutex_lock(&psmouse_mutex);
1916 if (serio->drv != &psmouse_drv) {
1917 input_free_device(new_dev);
1921 if (psmouse->protocol == proto) {
1922 input_free_device(new_dev);
1923 return count; /* switched by other thread */
1927 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1928 parent = serio_get_drvdata(serio->parent);
1929 if (parent->pt_deactivate)
1930 parent->pt_deactivate(parent);
1933 old_dev = psmouse->dev;
1934 old_proto = psmouse->protocol;
1936 if (psmouse->disconnect)
1937 psmouse->disconnect(psmouse);
1939 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1941 psmouse->dev = new_dev;
1942 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1944 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1945 psmouse_reset(psmouse);
1946 /* default to PSMOUSE_PS2 */
1947 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1950 psmouse_initialize(psmouse);
1951 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1953 if (psmouse->protocol->smbus_companion) {
1954 input_free_device(psmouse->dev);
1955 psmouse->dev = NULL;
1957 error = input_register_device(psmouse->dev);
1959 if (psmouse->disconnect)
1960 psmouse->disconnect(psmouse);
1962 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1963 input_free_device(new_dev);
1964 psmouse->dev = old_dev;
1965 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1966 psmouse_switch_protocol(psmouse, old_proto);
1967 psmouse_initialize(psmouse);
1968 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1975 input_unregister_device(old_dev);
1977 if (parent && parent->pt_activate)
1978 parent->pt_activate(parent);
1983 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1988 err = kstrtouint(buf, 10, &value);
1992 psmouse->set_rate(psmouse, value);
1996 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
2001 err = kstrtouint(buf, 10, &value);
2005 psmouse->set_resolution(psmouse, value);
2010 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
2012 const struct psmouse_protocol *proto;
2017 proto = psmouse_protocol_by_name(val, strlen(val));
2019 if (!proto || !proto->maxproto)
2022 *((unsigned int *)kp->arg) = proto->type;
2027 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
2029 int type = *((unsigned int *)kp->arg);
2031 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
2034 static int __init psmouse_init(void)
2038 lifebook_module_init();
2039 synaptics_module_init();
2042 err = psmouse_smbus_module_init();
2046 kpsmoused_wq = alloc_ordered_workqueue("kpsmoused", 0);
2047 if (!kpsmoused_wq) {
2048 pr_err("failed to create kpsmoused workqueue\n");
2050 goto err_smbus_exit;
2053 err = serio_register_driver(&psmouse_drv);
2055 goto err_destroy_wq;
2060 destroy_workqueue(kpsmoused_wq);
2062 psmouse_smbus_module_exit();
2066 static void __exit psmouse_exit(void)
2068 serio_unregister_driver(&psmouse_drv);
2069 destroy_workqueue(kpsmoused_wq);
2070 psmouse_smbus_module_exit();
2073 module_init(psmouse_init);
2074 module_exit(psmouse_exit);