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"
39 #define DRIVER_DESC "PS/2 mouse driver"
41 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
42 MODULE_DESCRIPTION(DRIVER_DESC);
43 MODULE_LICENSE("GPL");
45 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
46 static int psmouse_set_maxproto(const char *val, const struct kernel_param *);
47 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp);
48 static struct kernel_param_ops param_ops_proto_abbrev = {
49 .set = psmouse_set_maxproto,
50 .get = psmouse_get_maxproto,
52 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
53 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
54 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
56 static unsigned int psmouse_resolution = 200;
57 module_param_named(resolution, psmouse_resolution, uint, 0644);
58 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
60 static unsigned int psmouse_rate = 100;
61 module_param_named(rate, psmouse_rate, uint, 0644);
62 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
64 static bool psmouse_smartscroll = 1;
65 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
66 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
68 static unsigned int psmouse_resetafter = 5;
69 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
70 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
72 static unsigned int psmouse_resync_time;
73 module_param_named(resync_time, psmouse_resync_time, uint, 0644);
74 MODULE_PARM_DESC(resync_time, "How long can mouse stay idle before forcing resync (in seconds, 0 = never).");
76 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
78 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
79 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
80 (void *) offsetof(struct psmouse, rate),
81 psmouse_show_int_attr, psmouse_attr_set_rate);
82 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
83 (void *) offsetof(struct psmouse, resolution),
84 psmouse_show_int_attr, psmouse_attr_set_resolution);
85 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
86 (void *) offsetof(struct psmouse, resetafter),
87 psmouse_show_int_attr, psmouse_set_int_attr);
88 PSMOUSE_DEFINE_ATTR(resync_time, S_IWUSR | S_IRUGO,
89 (void *) offsetof(struct psmouse, resync_time),
90 psmouse_show_int_attr, psmouse_set_int_attr);
92 static struct attribute *psmouse_attributes[] = {
93 &psmouse_attr_protocol.dattr.attr,
94 &psmouse_attr_rate.dattr.attr,
95 &psmouse_attr_resolution.dattr.attr,
96 &psmouse_attr_resetafter.dattr.attr,
97 &psmouse_attr_resync_time.dattr.attr,
101 static struct attribute_group psmouse_attribute_group = {
102 .attrs = psmouse_attributes,
106 * psmouse_mutex protects all operations changing state of mouse
107 * (connecting, disconnecting, changing rate or resolution via
108 * sysfs). We could use a per-device semaphore but since there
109 * rarely more than one PS/2 mouse connected and since semaphore
110 * is taken in "slow" paths it is not worth it.
112 static DEFINE_MUTEX(psmouse_mutex);
114 static struct workqueue_struct *kpsmoused_wq;
116 struct psmouse_protocol {
117 enum psmouse_type type;
119 bool ignore_parity; /* Protocol should ignore parity errors from KBC */
122 int (*detect)(struct psmouse *, bool);
123 int (*init)(struct psmouse *);
127 * psmouse_process_byte() analyzes the PS/2 data stream and reports
128 * relevant events to the input module once full packet has arrived.
131 psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse)
133 struct input_dev *dev = psmouse->dev;
134 unsigned char *packet = psmouse->packet;
136 if (psmouse->pktcnt < psmouse->pktsize)
137 return PSMOUSE_GOOD_DATA;
140 * Full packet accumulated, process it
144 * Scroll wheel on IntelliMice, scroll buttons on NetMice
147 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
148 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
151 * Scroll wheel and buttons on IntelliMouse Explorer
154 if (psmouse->type == PSMOUSE_IMEX) {
155 switch (packet[3] & 0xC0) {
156 case 0x80: /* vertical scroll on IntelliMouse Explorer 4.0 */
157 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
159 case 0x40: /* horizontal scroll on IntelliMouse Explorer 4.0 */
160 input_report_rel(dev, REL_HWHEEL, (int) (packet[3] & 32) - (int) (packet[3] & 31));
164 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
165 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
166 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
172 * Extra buttons on Genius NewNet 3D
175 if (psmouse->type == PSMOUSE_GENPS) {
176 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
177 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
181 * Extra button on ThinkingMouse
183 if (psmouse->type == PSMOUSE_THINKPS) {
184 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
185 /* Without this bit of weirdness moving up gives wildly high Y changes. */
186 packet[1] |= (packet[0] & 0x40) << 1;
190 * Cortron PS2 Trackball reports SIDE button on the 4th bit of the first
193 if (psmouse->type == PSMOUSE_CORTRON) {
194 input_report_key(dev, BTN_SIDE, (packet[0] >> 3) & 1);
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.
224 static inline void __psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
226 psmouse->state = new_state;
227 psmouse->pktcnt = psmouse->out_of_sync_cnt = 0;
228 psmouse->ps2dev.flags = 0;
229 psmouse->last = jiffies;
234 * psmouse_set_state() sets new psmouse state and resets all flags and
235 * counters while holding serio lock so fighting with interrupt handler
239 void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
241 serio_pause_rx(psmouse->ps2dev.serio);
242 __psmouse_set_state(psmouse, new_state);
243 serio_continue_rx(psmouse->ps2dev.serio);
247 * psmouse_handle_byte() processes one byte of the input data stream
248 * by calling corresponding protocol handler.
251 static int psmouse_handle_byte(struct psmouse *psmouse)
253 psmouse_ret_t rc = psmouse->protocol_handler(psmouse);
256 case PSMOUSE_BAD_DATA:
257 if (psmouse->state == PSMOUSE_ACTIVATED) {
258 psmouse_warn(psmouse,
259 "%s at %s lost sync at byte %d\n",
260 psmouse->name, psmouse->phys,
262 if (++psmouse->out_of_sync_cnt == psmouse->resetafter) {
263 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
264 psmouse_notice(psmouse,
265 "issuing reconnect request\n");
266 serio_reconnect(psmouse->ps2dev.serio);
273 case PSMOUSE_FULL_PACKET:
275 if (psmouse->out_of_sync_cnt) {
276 psmouse->out_of_sync_cnt = 0;
277 psmouse_notice(psmouse,
278 "%s at %s - driver resynced.\n",
279 psmouse->name, psmouse->phys);
283 case PSMOUSE_GOOD_DATA:
290 * psmouse_interrupt() handles incoming characters, either passing them
291 * for normal processing or gathering them as command response.
294 static irqreturn_t psmouse_interrupt(struct serio *serio,
295 unsigned char data, unsigned int flags)
297 struct psmouse *psmouse = serio_get_drvdata(serio);
299 if (psmouse->state == PSMOUSE_IGNORE)
302 if (unlikely((flags & SERIO_TIMEOUT) ||
303 ((flags & SERIO_PARITY) && !psmouse->ignore_parity))) {
305 if (psmouse->state == PSMOUSE_ACTIVATED)
306 psmouse_warn(psmouse,
307 "bad data from KBC -%s%s\n",
308 flags & SERIO_TIMEOUT ? " timeout" : "",
309 flags & SERIO_PARITY ? " bad parity" : "");
310 ps2_cmd_aborted(&psmouse->ps2dev);
314 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
315 if (ps2_handle_ack(&psmouse->ps2dev, data))
318 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
319 if (ps2_handle_response(&psmouse->ps2dev, data))
322 if (psmouse->state <= PSMOUSE_RESYNCING)
325 if (psmouse->state == PSMOUSE_ACTIVATED &&
326 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
327 psmouse_info(psmouse, "%s at %s lost synchronization, throwing %d bytes away.\n",
328 psmouse->name, psmouse->phys, psmouse->pktcnt);
329 psmouse->badbyte = psmouse->packet[0];
330 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
331 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
335 psmouse->packet[psmouse->pktcnt++] = data;
337 * Check if this is a new device announcement (0xAA 0x00)
339 if (unlikely(psmouse->packet[0] == PSMOUSE_RET_BAT && psmouse->pktcnt <= 2)) {
340 if (psmouse->pktcnt == 1) {
341 psmouse->last = jiffies;
345 if (psmouse->packet[1] == PSMOUSE_RET_ID ||
346 (psmouse->type == PSMOUSE_HGPK &&
347 psmouse->packet[1] == PSMOUSE_RET_BAT)) {
348 __psmouse_set_state(psmouse, PSMOUSE_IGNORE);
349 serio_reconnect(serio);
353 * Not a new device, try processing first byte normally
356 if (psmouse_handle_byte(psmouse))
359 psmouse->packet[psmouse->pktcnt++] = data;
363 * See if we need to force resync because mouse was idle for too long
365 if (psmouse->state == PSMOUSE_ACTIVATED &&
366 psmouse->pktcnt == 1 && psmouse->resync_time &&
367 time_after(jiffies, psmouse->last + psmouse->resync_time * HZ)) {
368 psmouse->badbyte = psmouse->packet[0];
369 __psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
370 psmouse_queue_work(psmouse, &psmouse->resync_work, 0);
374 psmouse->last = jiffies;
375 psmouse_handle_byte(psmouse);
383 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
384 * using sliced syntax, understood by advanced devices, such as Logitech
385 * or Synaptics touchpads. The command is encoded as:
386 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
389 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
393 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
396 for (i = 6; i >= 0; i -= 2) {
397 unsigned char d = (command >> i) & 3;
398 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
407 * psmouse_reset() resets the mouse into power-on state.
409 int psmouse_reset(struct psmouse *psmouse)
411 unsigned char param[2];
413 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
416 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
423 * Here we set the mouse resolution.
426 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
428 static const unsigned char params[] = { 0, 1, 2, 2, 3 };
431 if (resolution == 0 || resolution > 200)
434 p = params[resolution / 50];
435 ps2_command(&psmouse->ps2dev, &p, PSMOUSE_CMD_SETRES);
436 psmouse->resolution = 25 << p;
440 * Here we set the mouse report rate.
443 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
445 static const unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
449 while (rates[i] > rate) i++;
451 ps2_command(&psmouse->ps2dev, &r, PSMOUSE_CMD_SETRATE);
456 * psmouse_poll() - default poll handler. Everyone except for ALPS uses it.
459 static int psmouse_poll(struct psmouse *psmouse)
461 return ps2_command(&psmouse->ps2dev, psmouse->packet,
462 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8));
467 * Genius NetMouse magic init.
469 static int genius_detect(struct psmouse *psmouse, bool set_properties)
471 struct ps2dev *ps2dev = &psmouse->ps2dev;
472 unsigned char param[4];
475 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
476 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
477 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
478 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
479 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
481 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
484 if (set_properties) {
485 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
486 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
487 __set_bit(BTN_SIDE, psmouse->dev->keybit);
488 __set_bit(REL_WHEEL, psmouse->dev->relbit);
490 psmouse->vendor = "Genius";
491 psmouse->name = "Mouse";
492 psmouse->pktsize = 4;
499 * IntelliMouse magic init.
501 static int intellimouse_detect(struct psmouse *psmouse, bool set_properties)
503 struct ps2dev *ps2dev = &psmouse->ps2dev;
504 unsigned char param[2];
507 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
509 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
511 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
512 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
517 if (set_properties) {
518 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
519 __set_bit(REL_WHEEL, psmouse->dev->relbit);
521 if (!psmouse->vendor)
522 psmouse->vendor = "Generic";
524 psmouse->name = "Wheel Mouse";
525 psmouse->pktsize = 4;
532 * Try IntelliMouse/Explorer magic init.
534 static int im_explorer_detect(struct psmouse *psmouse, bool set_properties)
536 struct ps2dev *ps2dev = &psmouse->ps2dev;
537 unsigned char param[2];
539 intellimouse_detect(psmouse, 0);
542 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
544 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
546 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
547 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
552 /* Magic to enable horizontal scrolling on IntelliMouse 4.0 */
554 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
556 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
558 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
560 if (set_properties) {
561 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
562 __set_bit(REL_WHEEL, psmouse->dev->relbit);
563 __set_bit(REL_HWHEEL, psmouse->dev->relbit);
564 __set_bit(BTN_SIDE, psmouse->dev->keybit);
565 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
567 if (!psmouse->vendor)
568 psmouse->vendor = "Generic";
570 psmouse->name = "Explorer Mouse";
571 psmouse->pktsize = 4;
578 * Kensington ThinkingMouse / ExpertMouse magic init.
580 static int thinking_detect(struct psmouse *psmouse, bool set_properties)
582 struct ps2dev *ps2dev = &psmouse->ps2dev;
583 unsigned char param[2];
584 static const unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20 };
588 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
590 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
591 for (i = 0; i < ARRAY_SIZE(seq); i++) {
593 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
595 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
600 if (set_properties) {
601 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
602 __set_bit(BTN_EXTRA, psmouse->dev->keybit);
604 psmouse->vendor = "Kensington";
605 psmouse->name = "ThinkingMouse";
612 * Bare PS/2 protocol "detection". Always succeeds.
614 static int ps2bare_detect(struct psmouse *psmouse, bool set_properties)
616 if (set_properties) {
617 if (!psmouse->vendor)
618 psmouse->vendor = "Generic";
620 psmouse->name = "Mouse";
623 * We have no way of figuring true number of buttons so let's
624 * assume that the device has 3.
626 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
633 * Cortron PS/2 protocol detection. There's no special way to detect it, so it
634 * must be forced by sysfs protocol writing.
636 static int cortron_detect(struct psmouse *psmouse, bool set_properties)
638 if (set_properties) {
639 psmouse->vendor = "Cortron";
640 psmouse->name = "PS/2 Trackball";
642 __set_bit(BTN_MIDDLE, psmouse->dev->keybit);
643 __set_bit(BTN_SIDE, psmouse->dev->keybit);
650 * Apply default settings to the psmouse structure. Most of them will
651 * be overridden by individual protocol initialization routines.
654 static void psmouse_apply_defaults(struct psmouse *psmouse)
656 struct input_dev *input_dev = psmouse->dev;
658 memset(input_dev->evbit, 0, sizeof(input_dev->evbit));
659 memset(input_dev->keybit, 0, sizeof(input_dev->keybit));
660 memset(input_dev->relbit, 0, sizeof(input_dev->relbit));
661 memset(input_dev->absbit, 0, sizeof(input_dev->absbit));
662 memset(input_dev->mscbit, 0, sizeof(input_dev->mscbit));
664 __set_bit(EV_KEY, input_dev->evbit);
665 __set_bit(EV_REL, input_dev->evbit);
667 __set_bit(BTN_LEFT, input_dev->keybit);
668 __set_bit(BTN_RIGHT, input_dev->keybit);
670 __set_bit(REL_X, input_dev->relbit);
671 __set_bit(REL_Y, input_dev->relbit);
673 __set_bit(INPUT_PROP_POINTER, input_dev->propbit);
675 psmouse->set_rate = psmouse_set_rate;
676 psmouse->set_resolution = psmouse_set_resolution;
677 psmouse->poll = psmouse_poll;
678 psmouse->protocol_handler = psmouse_process_byte;
679 psmouse->pktsize = 3;
680 psmouse->reconnect = NULL;
681 psmouse->disconnect = NULL;
682 psmouse->cleanup = NULL;
683 psmouse->pt_activate = NULL;
684 psmouse->pt_deactivate = NULL;
688 * Apply default settings to the psmouse structure and call specified
689 * protocol detection or initialization routine.
691 static int psmouse_do_detect(int (*detect)(struct psmouse *psmouse,
692 bool set_properties),
693 struct psmouse *psmouse, bool set_properties)
696 psmouse_apply_defaults(psmouse);
698 return detect(psmouse, set_properties);
702 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
703 * the mouse may have.
706 static int psmouse_extensions(struct psmouse *psmouse,
707 unsigned int max_proto, bool set_properties)
709 bool synaptics_hardware = false;
712 * We always check for lifebook because it does not disturb mouse
713 * (it only checks DMI information).
715 if (psmouse_do_detect(lifebook_detect, psmouse, set_properties) == 0) {
716 if (max_proto > PSMOUSE_IMEX) {
717 if (!set_properties || lifebook_init(psmouse) == 0)
718 return PSMOUSE_LIFEBOOK;
723 * Try Kensington ThinkingMouse (we try first, because synaptics probe
724 * upsets the thinkingmouse).
727 if (max_proto > PSMOUSE_IMEX &&
728 psmouse_do_detect(thinking_detect, psmouse, set_properties) == 0) {
729 return PSMOUSE_THINKPS;
733 * Try Synaptics TouchPad. Note that probing is done even if Synaptics protocol
734 * support is disabled in config - we need to know if it is synaptics so we
735 * can reset it properly after probing for intellimouse.
737 if (max_proto > PSMOUSE_PS2 &&
738 psmouse_do_detect(synaptics_detect, psmouse, set_properties) == 0) {
739 synaptics_hardware = true;
741 if (max_proto > PSMOUSE_IMEX) {
743 * Try activating protocol, but check if support is enabled first, since
744 * we try detecting Synaptics even when protocol is disabled.
746 if (synaptics_supported() &&
747 (!set_properties || synaptics_init(psmouse) == 0)) {
748 return PSMOUSE_SYNAPTICS;
752 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
753 * Unfortunately Logitech/Genius probes confuse some firmware versions so
754 * we'll have to skip them.
756 max_proto = PSMOUSE_IMEX;
759 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
761 synaptics_reset(psmouse);
765 * Try Cypress Trackpad.
766 * Must try it before Finger Sensing Pad because Finger Sensing Pad probe
767 * upsets some modules of Cypress Trackpads.
769 if (max_proto > PSMOUSE_IMEX &&
770 cypress_detect(psmouse, set_properties) == 0) {
771 if (cypress_supported()) {
772 if (cypress_init(psmouse) == 0)
773 return PSMOUSE_CYPRESS;
776 * Finger Sensing Pad probe upsets some modules of
777 * Cypress Trackpad, must avoid Finger Sensing Pad
778 * probe if Cypress Trackpad device detected.
783 max_proto = PSMOUSE_IMEX;
789 if (max_proto > PSMOUSE_IMEX) {
790 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
791 if (psmouse_do_detect(alps_detect,
792 psmouse, set_properties) == 0) {
793 if (!set_properties || alps_init(psmouse) == 0)
796 * Init failed, try basic relative protocols
798 max_proto = PSMOUSE_IMEX;
803 * Try OLPC HGPK touchpad.
805 if (max_proto > PSMOUSE_IMEX &&
806 psmouse_do_detect(hgpk_detect, psmouse, set_properties) == 0) {
807 if (!set_properties || hgpk_init(psmouse) == 0)
810 * Init failed, try basic relative protocols
812 max_proto = PSMOUSE_IMEX;
816 * Try Elantech touchpad.
818 if (max_proto > PSMOUSE_IMEX &&
819 psmouse_do_detect(elantech_detect, psmouse, set_properties) == 0) {
820 if (!set_properties || elantech_init(psmouse) == 0)
821 return PSMOUSE_ELANTECH;
823 * Init failed, try basic relative protocols
825 max_proto = PSMOUSE_IMEX;
828 if (max_proto > PSMOUSE_IMEX) {
829 if (psmouse_do_detect(genius_detect,
830 psmouse, set_properties) == 0)
831 return PSMOUSE_GENPS;
833 if (psmouse_do_detect(ps2pp_init,
834 psmouse, set_properties) == 0)
835 return PSMOUSE_PS2PP;
837 if (psmouse_do_detect(trackpoint_detect,
838 psmouse, set_properties) == 0)
839 return PSMOUSE_TRACKPOINT;
841 if (psmouse_do_detect(touchkit_ps2_detect,
842 psmouse, set_properties) == 0)
843 return PSMOUSE_TOUCHKIT_PS2;
847 * Try Finger Sensing Pad. We do it here because its probe upsets
848 * Trackpoint devices (causing TP_READ_ID command to time out).
850 if (max_proto > PSMOUSE_IMEX) {
851 if (psmouse_do_detect(fsp_detect,
852 psmouse, set_properties) == 0) {
853 if (!set_properties || fsp_init(psmouse) == 0)
856 * Init failed, try basic relative protocols
858 max_proto = PSMOUSE_IMEX;
863 * Reset to defaults in case the device got confused by extended
864 * protocol probes. Note that we follow up with full reset because
865 * some mice put themselves to sleep when they see PSMOUSE_RESET_DIS.
867 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
868 psmouse_reset(psmouse);
870 if (max_proto >= PSMOUSE_IMEX &&
871 psmouse_do_detect(im_explorer_detect,
872 psmouse, set_properties) == 0) {
876 if (max_proto >= PSMOUSE_IMPS &&
877 psmouse_do_detect(intellimouse_detect,
878 psmouse, set_properties) == 0) {
883 * Okay, all failed, we have a standard mouse here. The number of the buttons
884 * is still a question, though. We assume 3.
886 psmouse_do_detect(ps2bare_detect, psmouse, set_properties);
888 if (synaptics_hardware) {
890 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
891 * We need to reset the touchpad because if there is a track point on the
892 * pass through port it could get disabled while probing for protocol
895 psmouse_reset(psmouse);
901 static const struct psmouse_protocol psmouse_protocols[] = {
907 .ignore_parity = true,
908 .detect = ps2bare_detect,
910 #ifdef CONFIG_MOUSE_PS2_LOGIPS2PP
912 .type = PSMOUSE_PS2PP,
915 .detect = ps2pp_init,
919 .type = PSMOUSE_THINKPS,
922 .detect = thinking_detect,
924 #ifdef CONFIG_MOUSE_PS2_CYPRESS
926 .type = PSMOUSE_CYPRESS,
929 .detect = cypress_detect,
930 .init = cypress_init,
934 .type = PSMOUSE_GENPS,
937 .detect = genius_detect,
940 .type = PSMOUSE_IMPS,
944 .ignore_parity = true,
945 .detect = intellimouse_detect,
948 .type = PSMOUSE_IMEX,
952 .ignore_parity = true,
953 .detect = im_explorer_detect,
955 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
957 .type = PSMOUSE_SYNAPTICS,
959 .alias = "synaptics",
960 .detect = synaptics_detect,
961 .init = synaptics_init,
964 .type = PSMOUSE_SYNAPTICS_RELATIVE,
965 .name = "SynRelPS/2",
966 .alias = "synaptics-relative",
967 .detect = synaptics_detect,
968 .init = synaptics_init_relative,
971 #ifdef CONFIG_MOUSE_PS2_ALPS
973 .type = PSMOUSE_ALPS,
976 .detect = alps_detect,
980 #ifdef CONFIG_MOUSE_PS2_LIFEBOOK
982 .type = PSMOUSE_LIFEBOOK,
985 .init = lifebook_init,
988 #ifdef CONFIG_MOUSE_PS2_TRACKPOINT
990 .type = PSMOUSE_TRACKPOINT,
992 .alias = "trackpoint",
993 .detect = trackpoint_detect,
996 #ifdef CONFIG_MOUSE_PS2_TOUCHKIT
998 .type = PSMOUSE_TOUCHKIT_PS2,
999 .name = "touchkitPS/2",
1000 .alias = "touchkit",
1001 .detect = touchkit_ps2_detect,
1004 #ifdef CONFIG_MOUSE_PS2_OLPC
1006 .type = PSMOUSE_HGPK,
1007 .name = "OLPC HGPK",
1009 .detect = hgpk_detect,
1012 #ifdef CONFIG_MOUSE_PS2_ELANTECH
1014 .type = PSMOUSE_ELANTECH,
1016 .alias = "elantech",
1017 .detect = elantech_detect,
1018 .init = elantech_init,
1021 #ifdef CONFIG_MOUSE_PS2_SENTELIC
1023 .type = PSMOUSE_FSP,
1026 .detect = fsp_detect,
1031 .type = PSMOUSE_CORTRON,
1032 .name = "CortronPS/2",
1034 .detect = cortron_detect,
1037 .type = PSMOUSE_AUTO,
1044 static const struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
1048 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
1049 if (psmouse_protocols[i].type == type)
1050 return &psmouse_protocols[i];
1053 return &psmouse_protocols[0];
1056 static const struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
1058 const struct psmouse_protocol *p;
1061 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
1062 p = &psmouse_protocols[i];
1064 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
1065 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
1066 return &psmouse_protocols[i];
1074 * psmouse_probe() probes for a PS/2 mouse.
1077 static int psmouse_probe(struct psmouse *psmouse)
1079 struct ps2dev *ps2dev = &psmouse->ps2dev;
1080 unsigned char param[2];
1083 * First, we check if it's a mouse. It should send 0x00 or 0x03
1084 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
1085 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
1086 * ID queries, probably due to a firmware bug.
1090 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1093 if (param[0] != 0x00 && param[0] != 0x03 &&
1094 param[0] != 0x04 && param[0] != 0xff)
1098 * Then we reset and disable the mouse so that it doesn't generate events.
1101 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
1102 psmouse_warn(psmouse, "Failed to reset mouse on %s\n",
1103 ps2dev->serio->phys);
1109 * psmouse_initialize() initializes the mouse to a sane state.
1112 static void psmouse_initialize(struct psmouse *psmouse)
1115 * We set the mouse report rate, resolution and scaling.
1118 if (psmouse_max_proto != PSMOUSE_PS2) {
1119 psmouse->set_rate(psmouse, psmouse->rate);
1120 psmouse->set_resolution(psmouse, psmouse->resolution);
1121 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
1126 * psmouse_activate() enables the mouse so that we get motion reports from it.
1129 int psmouse_activate(struct psmouse *psmouse)
1131 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1132 psmouse_warn(psmouse, "Failed to enable mouse on %s\n",
1133 psmouse->ps2dev.serio->phys);
1137 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1142 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
1143 * reports from it unless we explicitly request it.
1146 int psmouse_deactivate(struct psmouse *psmouse)
1148 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE)) {
1149 psmouse_warn(psmouse, "Failed to deactivate mouse on %s\n",
1150 psmouse->ps2dev.serio->phys);
1154 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1160 * psmouse_resync() attempts to re-validate current protocol.
1163 static void psmouse_resync(struct work_struct *work)
1165 struct psmouse *parent = NULL, *psmouse =
1166 container_of(work, struct psmouse, resync_work.work);
1167 struct serio *serio = psmouse->ps2dev.serio;
1168 psmouse_ret_t rc = PSMOUSE_GOOD_DATA;
1169 bool failed = false, enabled = false;
1172 mutex_lock(&psmouse_mutex);
1174 if (psmouse->state != PSMOUSE_RESYNCING)
1177 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1178 parent = serio_get_drvdata(serio->parent);
1179 psmouse_deactivate(parent);
1183 * Some mice don't ACK commands sent while they are in the middle of
1184 * transmitting motion packet. To avoid delay we use ps2_sendbyte()
1185 * instead of ps2_command() which would wait for 200ms for an ACK
1186 * that may never come.
1187 * As an additional quirk ALPS touchpads may not only forget to ACK
1188 * disable command but will stop reporting taps, so if we see that
1189 * mouse at least once ACKs disable we will do full reconnect if ACK
1192 psmouse->num_resyncs++;
1194 if (ps2_sendbyte(&psmouse->ps2dev, PSMOUSE_CMD_DISABLE, 20)) {
1195 if (psmouse->num_resyncs < 3 || psmouse->acks_disable_command)
1198 psmouse->acks_disable_command = true;
1201 * Poll the mouse. If it was reset the packet will be shorter than
1202 * psmouse->pktsize and ps2_command will fail. We do not expect and
1203 * do not handle scenario when mouse "upgrades" its protocol while
1204 * disconnected since it would require additional delay. If we ever
1205 * see a mouse that does it we'll adjust the code.
1208 if (psmouse->poll(psmouse))
1211 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1212 for (i = 0; i < psmouse->pktsize; i++) {
1214 rc = psmouse->protocol_handler(psmouse);
1215 if (rc != PSMOUSE_GOOD_DATA)
1218 if (rc != PSMOUSE_FULL_PACKET)
1220 psmouse_set_state(psmouse, PSMOUSE_RESYNCING);
1224 * Now try to enable mouse. We try to do that even if poll failed and also
1225 * repeat our attempts 5 times, otherwise we may be left out with disabled
1228 for (i = 0; i < 5; i++) {
1229 if (!ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1237 psmouse_warn(psmouse, "failed to re-enable mouse on %s\n",
1238 psmouse->ps2dev.serio->phys);
1243 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1244 psmouse_info(psmouse,
1245 "resync failed, issuing reconnect request\n");
1246 serio_reconnect(serio);
1248 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
1251 psmouse_activate(parent);
1253 mutex_unlock(&psmouse_mutex);
1257 * psmouse_cleanup() resets the mouse into power-on state.
1260 static void psmouse_cleanup(struct serio *serio)
1262 struct psmouse *psmouse = serio_get_drvdata(serio);
1263 struct psmouse *parent = NULL;
1265 mutex_lock(&psmouse_mutex);
1267 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1268 parent = serio_get_drvdata(serio->parent);
1269 psmouse_deactivate(parent);
1272 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1275 * Disable stream mode so cleanup routine can proceed undisturbed.
1277 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1278 psmouse_warn(psmouse, "Failed to disable mouse on %s\n",
1279 psmouse->ps2dev.serio->phys);
1281 if (psmouse->cleanup)
1282 psmouse->cleanup(psmouse);
1285 * Reset the mouse to defaults (bare PS/2 protocol).
1287 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
1290 * Some boxes, such as HP nx7400, get terribly confused if mouse
1291 * is not fully enabled before suspending/shutting down.
1293 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE);
1296 if (parent->pt_deactivate)
1297 parent->pt_deactivate(parent);
1299 psmouse_activate(parent);
1302 mutex_unlock(&psmouse_mutex);
1306 * psmouse_disconnect() closes and frees.
1309 static void psmouse_disconnect(struct serio *serio)
1311 struct psmouse *psmouse, *parent = NULL;
1313 psmouse = serio_get_drvdata(serio);
1315 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
1317 mutex_lock(&psmouse_mutex);
1319 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1321 /* make sure we don't have a resync in progress */
1322 mutex_unlock(&psmouse_mutex);
1323 flush_workqueue(kpsmoused_wq);
1324 mutex_lock(&psmouse_mutex);
1326 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1327 parent = serio_get_drvdata(serio->parent);
1328 psmouse_deactivate(parent);
1331 if (psmouse->disconnect)
1332 psmouse->disconnect(psmouse);
1334 if (parent && parent->pt_deactivate)
1335 parent->pt_deactivate(parent);
1337 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1340 serio_set_drvdata(serio, NULL);
1341 input_unregister_device(psmouse->dev);
1345 psmouse_activate(parent);
1347 mutex_unlock(&psmouse_mutex);
1350 static int psmouse_switch_protocol(struct psmouse *psmouse,
1351 const struct psmouse_protocol *proto)
1353 const struct psmouse_protocol *selected_proto;
1354 struct input_dev *input_dev = psmouse->dev;
1356 input_dev->dev.parent = &psmouse->ps2dev.serio->dev;
1358 if (proto && (proto->detect || proto->init)) {
1359 psmouse_apply_defaults(psmouse);
1361 if (proto->detect && proto->detect(psmouse, true) < 0)
1364 if (proto->init && proto->init(psmouse) < 0)
1367 psmouse->type = proto->type;
1368 selected_proto = proto;
1370 psmouse->type = psmouse_extensions(psmouse,
1371 psmouse_max_proto, true);
1372 selected_proto = psmouse_protocol_by_type(psmouse->type);
1375 psmouse->ignore_parity = selected_proto->ignore_parity;
1378 * If mouse's packet size is 3 there is no point in polling the
1379 * device in hopes to detect protocol reset - we won't get less
1380 * than 3 bytes response anyhow.
1382 if (psmouse->pktsize == 3)
1383 psmouse->resync_time = 0;
1386 * Some smart KVMs fake response to POLL command returning just
1387 * 3 bytes and messing up our resync logic, so if initial poll
1388 * fails we won't try polling the device anymore. Hopefully
1389 * such KVM will maintain initially selected protocol.
1391 if (psmouse->resync_time && psmouse->poll(psmouse))
1392 psmouse->resync_time = 0;
1394 snprintf(psmouse->devname, sizeof(psmouse->devname), "%s %s %s",
1395 selected_proto->name, psmouse->vendor, psmouse->name);
1397 input_dev->name = psmouse->devname;
1398 input_dev->phys = psmouse->phys;
1399 input_dev->id.bustype = BUS_I8042;
1400 input_dev->id.vendor = 0x0002;
1401 input_dev->id.product = psmouse->type;
1402 input_dev->id.version = psmouse->model;
1408 * psmouse_connect() is a callback from the serio module when
1409 * an unhandled serio port is found.
1411 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
1413 struct psmouse *psmouse, *parent = NULL;
1414 struct input_dev *input_dev;
1415 int retval = 0, error = -ENOMEM;
1417 mutex_lock(&psmouse_mutex);
1420 * If this is a pass-through port deactivate parent so the device
1421 * connected to this port can be successfully identified
1423 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1424 parent = serio_get_drvdata(serio->parent);
1425 psmouse_deactivate(parent);
1428 psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL);
1429 input_dev = input_allocate_device();
1430 if (!psmouse || !input_dev)
1433 ps2_init(&psmouse->ps2dev, serio);
1434 INIT_DELAYED_WORK(&psmouse->resync_work, psmouse_resync);
1435 psmouse->dev = input_dev;
1436 snprintf(psmouse->phys, sizeof(psmouse->phys), "%s/input0", serio->phys);
1438 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1440 serio_set_drvdata(serio, psmouse);
1442 error = serio_open(serio, drv);
1444 goto err_clear_drvdata;
1446 if (psmouse_probe(psmouse) < 0) {
1448 goto err_close_serio;
1451 psmouse->rate = psmouse_rate;
1452 psmouse->resolution = psmouse_resolution;
1453 psmouse->resetafter = psmouse_resetafter;
1454 psmouse->resync_time = parent ? 0 : psmouse_resync_time;
1455 psmouse->smartscroll = psmouse_smartscroll;
1457 psmouse_switch_protocol(psmouse, NULL);
1459 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1460 psmouse_initialize(psmouse);
1462 error = input_register_device(psmouse->dev);
1464 goto err_protocol_disconnect;
1466 if (parent && parent->pt_activate)
1467 parent->pt_activate(parent);
1469 error = sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
1471 goto err_pt_deactivate;
1473 psmouse_activate(psmouse);
1476 /* If this is a pass-through port the parent needs to be re-activated */
1478 psmouse_activate(parent);
1480 mutex_unlock(&psmouse_mutex);
1484 if (parent && parent->pt_deactivate)
1485 parent->pt_deactivate(parent);
1486 input_unregister_device(psmouse->dev);
1487 input_dev = NULL; /* so we don't try to free it below */
1488 err_protocol_disconnect:
1489 if (psmouse->disconnect)
1490 psmouse->disconnect(psmouse);
1491 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1495 serio_set_drvdata(serio, NULL);
1497 input_free_device(input_dev);
1505 static int psmouse_reconnect(struct serio *serio)
1507 struct psmouse *psmouse = serio_get_drvdata(serio);
1508 struct psmouse *parent = NULL;
1509 struct serio_driver *drv = serio->drv;
1513 if (!drv || !psmouse) {
1514 psmouse_dbg(psmouse,
1515 "reconnect request, but serio is disconnected, ignoring...\n");
1519 mutex_lock(&psmouse_mutex);
1521 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1522 parent = serio_get_drvdata(serio->parent);
1523 psmouse_deactivate(parent);
1526 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1528 if (psmouse->reconnect) {
1529 if (psmouse->reconnect(psmouse))
1532 psmouse_reset(psmouse);
1534 if (psmouse_probe(psmouse) < 0)
1537 type = psmouse_extensions(psmouse, psmouse_max_proto, false);
1538 if (psmouse->type != type)
1543 * OK, the device type (and capabilities) match the old one,
1544 * we can continue using it, complete initialization
1546 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1548 psmouse_initialize(psmouse);
1550 if (parent && parent->pt_activate)
1551 parent->pt_activate(parent);
1553 psmouse_activate(psmouse);
1557 /* If this is a pass-through port the parent waits to be activated */
1559 psmouse_activate(parent);
1561 mutex_unlock(&psmouse_mutex);
1565 static struct serio_device_id psmouse_serio_ids[] = {
1573 .type = SERIO_PS_PSTHRU,
1581 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1583 static struct serio_driver psmouse_drv = {
1587 .description = DRIVER_DESC,
1588 .id_table = psmouse_serio_ids,
1589 .interrupt = psmouse_interrupt,
1590 .connect = psmouse_connect,
1591 .reconnect = psmouse_reconnect,
1592 .disconnect = psmouse_disconnect,
1593 .cleanup = psmouse_cleanup,
1596 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1599 struct serio *serio = to_serio_port(dev);
1600 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1601 struct psmouse *psmouse;
1603 psmouse = serio_get_drvdata(serio);
1605 return attr->show(psmouse, attr->data, buf);
1608 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1609 const char *buf, size_t count)
1611 struct serio *serio = to_serio_port(dev);
1612 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1613 struct psmouse *psmouse, *parent = NULL;
1616 retval = mutex_lock_interruptible(&psmouse_mutex);
1620 psmouse = serio_get_drvdata(serio);
1622 if (attr->protect) {
1623 if (psmouse->state == PSMOUSE_IGNORE) {
1628 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1629 parent = serio_get_drvdata(serio->parent);
1630 psmouse_deactivate(parent);
1633 psmouse_deactivate(psmouse);
1636 retval = attr->set(psmouse, attr->data, buf, count);
1638 if (attr->protect) {
1639 if (retval != -ENODEV)
1640 psmouse_activate(psmouse);
1643 psmouse_activate(parent);
1647 mutex_unlock(&psmouse_mutex);
1652 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1654 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1656 return sprintf(buf, "%u\n", *field);
1659 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1661 unsigned int *field = (unsigned int *)((char *)psmouse + (size_t)offset);
1665 err = kstrtouint(buf, 10, &value);
1674 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1676 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1679 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1681 struct serio *serio = psmouse->ps2dev.serio;
1682 struct psmouse *parent = NULL;
1683 struct input_dev *old_dev, *new_dev;
1684 const struct psmouse_protocol *proto, *old_proto;
1688 proto = psmouse_protocol_by_name(buf, count);
1692 if (psmouse->type == proto->type)
1695 new_dev = input_allocate_device();
1699 while (!list_empty(&serio->children)) {
1701 psmouse_warn(psmouse,
1702 "failed to destroy children ports, protocol change aborted.\n");
1703 input_free_device(new_dev);
1707 mutex_unlock(&psmouse_mutex);
1708 serio_unregister_child_port(serio);
1709 mutex_lock(&psmouse_mutex);
1711 if (serio->drv != &psmouse_drv) {
1712 input_free_device(new_dev);
1716 if (psmouse->type == proto->type) {
1717 input_free_device(new_dev);
1718 return count; /* switched by other thread */
1722 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1723 parent = serio_get_drvdata(serio->parent);
1724 if (parent->pt_deactivate)
1725 parent->pt_deactivate(parent);
1728 old_dev = psmouse->dev;
1729 old_proto = psmouse_protocol_by_type(psmouse->type);
1731 if (psmouse->disconnect)
1732 psmouse->disconnect(psmouse);
1734 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1736 psmouse->dev = new_dev;
1737 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1739 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1740 psmouse_reset(psmouse);
1741 /* default to PSMOUSE_PS2 */
1742 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1745 psmouse_initialize(psmouse);
1746 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1748 error = input_register_device(psmouse->dev);
1750 if (psmouse->disconnect)
1751 psmouse->disconnect(psmouse);
1753 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1754 input_free_device(new_dev);
1755 psmouse->dev = old_dev;
1756 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1757 psmouse_switch_protocol(psmouse, old_proto);
1758 psmouse_initialize(psmouse);
1759 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1764 input_unregister_device(old_dev);
1766 if (parent && parent->pt_activate)
1767 parent->pt_activate(parent);
1772 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1777 err = kstrtouint(buf, 10, &value);
1781 psmouse->set_rate(psmouse, value);
1785 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1790 err = kstrtouint(buf, 10, &value);
1794 psmouse->set_resolution(psmouse, value);
1799 static int psmouse_set_maxproto(const char *val, const struct kernel_param *kp)
1801 const struct psmouse_protocol *proto;
1806 proto = psmouse_protocol_by_name(val, strlen(val));
1808 if (!proto || !proto->maxproto)
1811 *((unsigned int *)kp->arg) = proto->type;
1816 static int psmouse_get_maxproto(char *buffer, const struct kernel_param *kp)
1818 int type = *((unsigned int *)kp->arg);
1820 return sprintf(buffer, "%s", psmouse_protocol_by_type(type)->name);
1823 static int __init psmouse_init(void)
1827 lifebook_module_init();
1828 synaptics_module_init();
1831 kpsmoused_wq = create_singlethread_workqueue("kpsmoused");
1832 if (!kpsmoused_wq) {
1833 pr_err("failed to create kpsmoused workqueue\n");
1837 err = serio_register_driver(&psmouse_drv);
1839 destroy_workqueue(kpsmoused_wq);
1844 static void __exit psmouse_exit(void)
1846 serio_unregister_driver(&psmouse_drv);
1847 destroy_workqueue(kpsmoused_wq);
1850 module_init(psmouse_init);
1851 module_exit(psmouse_exit);