4 * Copyright (c) 1999-2002 Vojtech Pavlik
5 * Copyright (c) 2003-2004 Dmitry Torokhov
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License version 2 as published by
11 * the Free Software Foundation.
14 #include <linux/delay.h>
15 #include <linux/module.h>
16 #include <linux/moduleparam.h>
17 #include <linux/slab.h>
18 #include <linux/interrupt.h>
19 #include <linux/input.h>
20 #include <linux/serio.h>
21 #include <linux/init.h>
22 #include <linux/libps2.h>
24 #include "synaptics.h"
25 #include "logips2pp.h"
28 #include "trackpoint.h"
30 #define DRIVER_DESC "PS/2 mouse driver"
32 MODULE_AUTHOR("Vojtech Pavlik <vojtech@suse.cz>");
33 MODULE_DESCRIPTION(DRIVER_DESC);
34 MODULE_LICENSE("GPL");
36 static unsigned int psmouse_max_proto = PSMOUSE_AUTO;
37 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp);
38 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp);
39 #define param_check_proto_abbrev(name, p) __param_check(name, p, unsigned int)
40 #define param_set_proto_abbrev psmouse_set_maxproto
41 #define param_get_proto_abbrev psmouse_get_maxproto
42 module_param_named(proto, psmouse_max_proto, proto_abbrev, 0644);
43 MODULE_PARM_DESC(proto, "Highest protocol extension to probe (bare, imps, exps, any). Useful for KVM switches.");
45 static unsigned int psmouse_resolution = 200;
46 module_param_named(resolution, psmouse_resolution, uint, 0644);
47 MODULE_PARM_DESC(resolution, "Resolution, in dpi.");
49 static unsigned int psmouse_rate = 100;
50 module_param_named(rate, psmouse_rate, uint, 0644);
51 MODULE_PARM_DESC(rate, "Report rate, in reports per second.");
53 static unsigned int psmouse_smartscroll = 1;
54 module_param_named(smartscroll, psmouse_smartscroll, bool, 0644);
55 MODULE_PARM_DESC(smartscroll, "Logitech Smartscroll autorepeat, 1 = enabled (default), 0 = disabled.");
57 static unsigned int psmouse_resetafter;
58 module_param_named(resetafter, psmouse_resetafter, uint, 0644);
59 MODULE_PARM_DESC(resetafter, "Reset device after so many bad packets (0 = never).");
61 PSMOUSE_DEFINE_ATTR(protocol, S_IWUSR | S_IRUGO,
63 psmouse_attr_show_protocol, psmouse_attr_set_protocol);
64 PSMOUSE_DEFINE_ATTR(rate, S_IWUSR | S_IRUGO,
65 (void *) offsetof(struct psmouse, rate),
66 psmouse_show_int_attr, psmouse_attr_set_rate);
67 PSMOUSE_DEFINE_ATTR(resolution, S_IWUSR | S_IRUGO,
68 (void *) offsetof(struct psmouse, resolution),
69 psmouse_show_int_attr, psmouse_attr_set_resolution);
70 PSMOUSE_DEFINE_ATTR(resetafter, S_IWUSR | S_IRUGO,
71 (void *) offsetof(struct psmouse, resetafter),
72 psmouse_show_int_attr, psmouse_set_int_attr);
74 static struct attribute *psmouse_attributes[] = {
75 &psmouse_attr_protocol.dattr.attr,
76 &psmouse_attr_rate.dattr.attr,
77 &psmouse_attr_resolution.dattr.attr,
78 &psmouse_attr_resetafter.dattr.attr,
82 static struct attribute_group psmouse_attribute_group = {
83 .attrs = psmouse_attributes,
86 __obsolete_setup("psmouse_noext");
87 __obsolete_setup("psmouse_resolution=");
88 __obsolete_setup("psmouse_smartscroll=");
89 __obsolete_setup("psmouse_resetafter=");
90 __obsolete_setup("psmouse_rate=");
93 * psmouse_sem protects all operations changing state of mouse
94 * (connecting, disconnecting, changing rate or resolution via
95 * sysfs). We could use a per-device semaphore but since there
96 * rarely more than one PS/2 mouse connected and since semaphore
97 * is taken in "slow" paths it is not worth it.
99 static DECLARE_MUTEX(psmouse_sem);
101 struct psmouse_protocol {
102 enum psmouse_type type;
106 int (*detect)(struct psmouse *, int);
107 int (*init)(struct psmouse *);
111 * psmouse_process_byte() analyzes the PS/2 data stream and reports
112 * relevant events to the input module once full packet has arrived.
115 static psmouse_ret_t psmouse_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
117 struct input_dev *dev = &psmouse->dev;
118 unsigned char *packet = psmouse->packet;
120 if (psmouse->pktcnt < psmouse->pktsize)
121 return PSMOUSE_GOOD_DATA;
124 * Full packet accumulated, process it
127 input_regs(dev, regs);
130 * Scroll wheel on IntelliMice, scroll buttons on NetMice
133 if (psmouse->type == PSMOUSE_IMPS || psmouse->type == PSMOUSE_GENPS)
134 input_report_rel(dev, REL_WHEEL, -(signed char) packet[3]);
137 * Scroll wheel and buttons on IntelliMouse Explorer
140 if (psmouse->type == PSMOUSE_IMEX) {
141 input_report_rel(dev, REL_WHEEL, (int) (packet[3] & 8) - (int) (packet[3] & 7));
142 input_report_key(dev, BTN_SIDE, (packet[3] >> 4) & 1);
143 input_report_key(dev, BTN_EXTRA, (packet[3] >> 5) & 1);
147 * Extra buttons on Genius NewNet 3D
150 if (psmouse->type == PSMOUSE_GENPS) {
151 input_report_key(dev, BTN_SIDE, (packet[0] >> 6) & 1);
152 input_report_key(dev, BTN_EXTRA, (packet[0] >> 7) & 1);
156 * Extra button on ThinkingMouse
158 if (psmouse->type == PSMOUSE_THINKPS) {
159 input_report_key(dev, BTN_EXTRA, (packet[0] >> 3) & 1);
160 /* Without this bit of weirdness moving up gives wildly high Y changes. */
161 packet[1] |= (packet[0] & 0x40) << 1;
168 input_report_key(dev, BTN_LEFT, packet[0] & 1);
169 input_report_key(dev, BTN_MIDDLE, (packet[0] >> 2) & 1);
170 input_report_key(dev, BTN_RIGHT, (packet[0] >> 1) & 1);
172 input_report_rel(dev, REL_X, packet[1] ? (int) packet[1] - (int) ((packet[0] << 4) & 0x100) : 0);
173 input_report_rel(dev, REL_Y, packet[2] ? (int) ((packet[0] << 3) & 0x100) - (int) packet[2] : 0);
177 return PSMOUSE_FULL_PACKET;
181 * psmouse_interrupt() handles incoming characters, either gathering them into
182 * packets or passing them to the command routine as command output.
185 static irqreturn_t psmouse_interrupt(struct serio *serio,
186 unsigned char data, unsigned int flags, struct pt_regs *regs)
188 struct psmouse *psmouse = serio_get_drvdata(serio);
191 if (psmouse->state == PSMOUSE_IGNORE)
194 if (flags & (SERIO_PARITY|SERIO_TIMEOUT)) {
195 if (psmouse->state == PSMOUSE_ACTIVATED)
196 printk(KERN_WARNING "psmouse.c: bad data from KBC -%s%s\n",
197 flags & SERIO_TIMEOUT ? " timeout" : "",
198 flags & SERIO_PARITY ? " bad parity" : "");
199 ps2_cmd_aborted(&psmouse->ps2dev);
203 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_ACK))
204 if (ps2_handle_ack(&psmouse->ps2dev, data))
207 if (unlikely(psmouse->ps2dev.flags & PS2_FLAG_CMD))
208 if (ps2_handle_response(&psmouse->ps2dev, data))
211 if (psmouse->state == PSMOUSE_INITIALIZING)
214 if (psmouse->state == PSMOUSE_ACTIVATED &&
215 psmouse->pktcnt && time_after(jiffies, psmouse->last + HZ/2)) {
216 printk(KERN_WARNING "psmouse.c: %s at %s lost synchronization, throwing %d bytes away.\n",
217 psmouse->name, psmouse->phys, psmouse->pktcnt);
221 psmouse->last = jiffies;
222 psmouse->packet[psmouse->pktcnt++] = data;
224 if (psmouse->packet[0] == PSMOUSE_RET_BAT) {
225 if (psmouse->pktcnt == 1)
228 if (psmouse->pktcnt == 2) {
229 if (psmouse->packet[1] == PSMOUSE_RET_ID) {
230 psmouse->state = PSMOUSE_IGNORE;
231 serio_reconnect(serio);
234 if (psmouse->type == PSMOUSE_SYNAPTICS) {
235 /* neither 0xAA nor 0x00 are valid first bytes
236 * for a packet in absolute mode
244 rc = psmouse->protocol_handler(psmouse, regs);
247 case PSMOUSE_BAD_DATA:
248 printk(KERN_WARNING "psmouse.c: %s at %s lost sync at byte %d\n",
249 psmouse->name, psmouse->phys, psmouse->pktcnt);
252 if (++psmouse->out_of_sync == psmouse->resetafter) {
253 psmouse->state = PSMOUSE_IGNORE;
254 printk(KERN_NOTICE "psmouse.c: issuing reconnect request\n");
255 serio_reconnect(psmouse->ps2dev.serio);
259 case PSMOUSE_FULL_PACKET:
261 if (psmouse->out_of_sync) {
262 psmouse->out_of_sync = 0;
263 printk(KERN_NOTICE "psmouse.c: %s at %s - driver resynched.\n",
264 psmouse->name, psmouse->phys);
268 case PSMOUSE_GOOD_DATA:
277 * psmouse_sliced_command() sends an extended PS/2 command to the mouse
278 * using sliced syntax, understood by advanced devices, such as Logitech
279 * or Synaptics touchpads. The command is encoded as:
280 * 0xE6 0xE8 rr 0xE8 ss 0xE8 tt 0xE8 uu where (rr*64)+(ss*16)+(tt*4)+uu
283 int psmouse_sliced_command(struct psmouse *psmouse, unsigned char command)
287 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
290 for (i = 6; i >= 0; i -= 2) {
291 unsigned char d = (command >> i) & 3;
292 if (ps2_command(&psmouse->ps2dev, &d, PSMOUSE_CMD_SETRES))
301 * psmouse_reset() resets the mouse into power-on state.
303 int psmouse_reset(struct psmouse *psmouse)
305 unsigned char param[2];
307 if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_RESET_BAT))
310 if (param[0] != PSMOUSE_RET_BAT && param[1] != PSMOUSE_RET_ID)
318 * Genius NetMouse magic init.
320 static int genius_detect(struct psmouse *psmouse, int set_properties)
322 struct ps2dev *ps2dev = &psmouse->ps2dev;
323 unsigned char param[4];
326 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
327 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
328 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
329 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
330 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
332 if (param[0] != 0x00 || param[1] != 0x33 || param[2] != 0x55)
335 if (set_properties) {
336 set_bit(BTN_EXTRA, psmouse->dev.keybit);
337 set_bit(BTN_SIDE, psmouse->dev.keybit);
338 set_bit(REL_WHEEL, psmouse->dev.relbit);
340 psmouse->vendor = "Genius";
341 psmouse->name = "Wheel Mouse";
342 psmouse->pktsize = 4;
349 * IntelliMouse magic init.
351 static int intellimouse_detect(struct psmouse *psmouse, int set_properties)
353 struct ps2dev *ps2dev = &psmouse->ps2dev;
354 unsigned char param[2];
357 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
359 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
361 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
362 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
367 if (set_properties) {
368 set_bit(BTN_MIDDLE, psmouse->dev.keybit);
369 set_bit(REL_WHEEL, psmouse->dev.relbit);
371 if (!psmouse->vendor) psmouse->vendor = "Generic";
372 if (!psmouse->name) psmouse->name = "Wheel Mouse";
373 psmouse->pktsize = 4;
380 * Try IntelliMouse/Explorer magic init.
382 static int im_explorer_detect(struct psmouse *psmouse, int set_properties)
384 struct ps2dev *ps2dev = &psmouse->ps2dev;
385 unsigned char param[2];
387 intellimouse_detect(psmouse, 0);
390 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
392 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
394 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
395 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
400 if (set_properties) {
401 set_bit(BTN_MIDDLE, psmouse->dev.keybit);
402 set_bit(REL_WHEEL, psmouse->dev.relbit);
403 set_bit(BTN_SIDE, psmouse->dev.keybit);
404 set_bit(BTN_EXTRA, psmouse->dev.keybit);
406 if (!psmouse->vendor) psmouse->vendor = "Generic";
407 if (!psmouse->name) psmouse->name = "Explorer Mouse";
408 psmouse->pktsize = 4;
415 * Kensington ThinkingMouse / ExpertMouse magic init.
417 static int thinking_detect(struct psmouse *psmouse, int set_properties)
419 struct ps2dev *ps2dev = &psmouse->ps2dev;
420 unsigned char param[2];
421 unsigned char seq[] = { 20, 60, 40, 20, 20, 60, 40, 20, 20, 0 };
425 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE);
427 ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
428 for (i = 0; seq[i]; i++)
429 ps2_command(ps2dev, seq + i, PSMOUSE_CMD_SETRATE);
430 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID);
435 if (set_properties) {
436 set_bit(BTN_EXTRA, psmouse->dev.keybit);
438 psmouse->vendor = "Kensington";
439 psmouse->name = "ThinkingMouse";
446 * Bare PS/2 protocol "detection". Always succeeds.
448 static int ps2bare_detect(struct psmouse *psmouse, int set_properties)
450 if (set_properties) {
451 if (!psmouse->vendor) psmouse->vendor = "Generic";
452 if (!psmouse->name) psmouse->name = "Mouse";
460 * psmouse_extensions() probes for any extensions to the basic PS/2 protocol
461 * the mouse may have.
464 static int psmouse_extensions(struct psmouse *psmouse,
465 unsigned int max_proto, int set_properties)
467 int synaptics_hardware = 0;
470 * We always check for lifebook because it does not disturb mouse
471 * (it only checks DMI information).
473 if (lifebook_detect(psmouse, set_properties) == 0) {
474 if (max_proto > PSMOUSE_IMEX) {
475 if (!set_properties || lifebook_init(psmouse) == 0)
476 return PSMOUSE_LIFEBOOK;
481 * Try Kensington ThinkingMouse (we try first, because synaptics probe
482 * upsets the thinkingmouse).
485 if (max_proto > PSMOUSE_IMEX && thinking_detect(psmouse, set_properties) == 0)
486 return PSMOUSE_THINKPS;
489 * Try Synaptics TouchPad
491 if (max_proto > PSMOUSE_PS2 && synaptics_detect(psmouse, set_properties) == 0) {
492 synaptics_hardware = 1;
494 if (max_proto > PSMOUSE_IMEX) {
495 if (!set_properties || synaptics_init(psmouse) == 0)
496 return PSMOUSE_SYNAPTICS;
498 * Some Synaptics touchpads can emulate extended protocols (like IMPS/2).
499 * Unfortunately Logitech/Genius probes confuse some firmware versions so
500 * we'll have to skip them.
502 max_proto = PSMOUSE_IMEX;
505 * Make sure that touchpad is in relative mode, gestures (taps) are enabled
507 synaptics_reset(psmouse);
513 if (max_proto > PSMOUSE_IMEX) {
514 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
515 if (alps_detect(psmouse, set_properties) == 0) {
516 if (!set_properties || alps_init(psmouse) == 0)
519 * Init failed, try basic relative protocols
521 max_proto = PSMOUSE_IMEX;
525 if (max_proto > PSMOUSE_IMEX && genius_detect(psmouse, set_properties) == 0)
526 return PSMOUSE_GENPS;
528 if (max_proto > PSMOUSE_IMEX && ps2pp_init(psmouse, set_properties) == 0)
529 return PSMOUSE_PS2PP;
532 * Reset to defaults in case the device got confused by extended
535 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
537 if (max_proto >= PSMOUSE_IMEX && im_explorer_detect(psmouse, set_properties) == 0)
540 if (max_proto >= PSMOUSE_IMPS && intellimouse_detect(psmouse, set_properties) == 0)
544 * Try to initialize the IBM TrackPoint
546 if (max_proto > PSMOUSE_IMEX && trackpoint_detect(psmouse, set_properties) == 0)
547 return PSMOUSE_TRACKPOINT;
550 * Okay, all failed, we have a standard mouse here. The number of the buttons
551 * is still a question, though. We assume 3.
553 ps2bare_detect(psmouse, set_properties);
555 if (synaptics_hardware) {
557 * We detected Synaptics hardware but it did not respond to IMPS/2 probes.
558 * We need to reset the touchpad because if there is a track point on the
559 * pass through port it could get disabled while probing for protocol
562 psmouse_reset(psmouse);
563 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_RESET_DIS);
569 static struct psmouse_protocol psmouse_protocols[] = {
575 .detect = ps2bare_detect,
578 .type = PSMOUSE_PS2PP,
581 .detect = ps2pp_init,
584 .type = PSMOUSE_THINKPS,
587 .detect = thinking_detect,
590 .type = PSMOUSE_GENPS,
593 .detect = genius_detect,
596 .type = PSMOUSE_IMPS,
600 .detect = intellimouse_detect,
603 .type = PSMOUSE_IMEX,
607 .detect = im_explorer_detect,
610 .type = PSMOUSE_SYNAPTICS,
612 .alias = "synaptics",
613 .detect = synaptics_detect,
614 .init = synaptics_init,
617 .type = PSMOUSE_ALPS,
620 .detect = alps_detect,
624 .type = PSMOUSE_LIFEBOOK,
627 .init = lifebook_init,
630 .type = PSMOUSE_TRACKPOINT,
632 .alias = "trackpoint",
633 .detect = trackpoint_detect,
636 .type = PSMOUSE_AUTO,
643 static struct psmouse_protocol *psmouse_protocol_by_type(enum psmouse_type type)
647 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++)
648 if (psmouse_protocols[i].type == type)
649 return &psmouse_protocols[i];
652 return &psmouse_protocols[0];
655 static struct psmouse_protocol *psmouse_protocol_by_name(const char *name, size_t len)
657 struct psmouse_protocol *p;
660 for (i = 0; i < ARRAY_SIZE(psmouse_protocols); i++) {
661 p = &psmouse_protocols[i];
663 if ((strlen(p->name) == len && !strncmp(p->name, name, len)) ||
664 (strlen(p->alias) == len && !strncmp(p->alias, name, len)))
665 return &psmouse_protocols[i];
673 * psmouse_probe() probes for a PS/2 mouse.
676 static int psmouse_probe(struct psmouse *psmouse)
678 struct ps2dev *ps2dev = &psmouse->ps2dev;
679 unsigned char param[2];
682 * First, we check if it's a mouse. It should send 0x00 or 0x03
683 * in case of an IntelliMouse in 4-byte mode or 0x04 for IM Explorer.
684 * Sunrex K8561 IR Keyboard/Mouse reports 0xff on second and subsequent
685 * ID queries, probably due to a firmware bug.
689 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
692 if (param[0] != 0x00 && param[0] != 0x03 &&
693 param[0] != 0x04 && param[0] != 0xff)
697 * Then we reset and disable the mouse so that it doesn't generate events.
700 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_DIS))
701 printk(KERN_WARNING "psmouse.c: Failed to reset mouse on %s\n", ps2dev->serio->phys);
707 * Here we set the mouse resolution.
710 void psmouse_set_resolution(struct psmouse *psmouse, unsigned int resolution)
712 unsigned char params[] = { 0, 1, 2, 2, 3 };
714 if (resolution == 0 || resolution > 200)
717 ps2_command(&psmouse->ps2dev, ¶ms[resolution / 50], PSMOUSE_CMD_SETRES);
718 psmouse->resolution = 25 << params[resolution / 50];
722 * Here we set the mouse report rate.
725 static void psmouse_set_rate(struct psmouse *psmouse, unsigned int rate)
727 unsigned char rates[] = { 200, 100, 80, 60, 40, 20, 10, 0 };
730 while (rates[i] > rate) i++;
731 ps2_command(&psmouse->ps2dev, &rates[i], PSMOUSE_CMD_SETRATE);
732 psmouse->rate = rates[i];
736 * psmouse_initialize() initializes the mouse to a sane state.
739 static void psmouse_initialize(struct psmouse *psmouse)
742 * We set the mouse into streaming mode.
745 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM);
748 * We set the mouse report rate, resolution and scaling.
751 if (psmouse_max_proto != PSMOUSE_PS2) {
752 psmouse->set_rate(psmouse, psmouse->rate);
753 psmouse->set_resolution(psmouse, psmouse->resolution);
754 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11);
759 * psmouse_set_state() sets new psmouse state and resets all flags and
760 * counters while holding serio lock so fighting with interrupt handler
764 static void psmouse_set_state(struct psmouse *psmouse, enum psmouse_state new_state)
766 serio_pause_rx(psmouse->ps2dev.serio);
767 psmouse->state = new_state;
768 psmouse->pktcnt = psmouse->out_of_sync = 0;
769 psmouse->ps2dev.flags = 0;
770 serio_continue_rx(psmouse->ps2dev.serio);
774 * psmouse_activate() enables the mouse so that we get motion reports from it.
777 static void psmouse_activate(struct psmouse *psmouse)
779 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_ENABLE))
780 printk(KERN_WARNING "psmouse.c: Failed to enable mouse on %s\n",
781 psmouse->ps2dev.serio->phys);
783 psmouse_set_state(psmouse, PSMOUSE_ACTIVATED);
788 * psmouse_deactivate() puts the mouse into poll mode so that we don't get motion
789 * reports from it unless we explicitely request it.
792 static void psmouse_deactivate(struct psmouse *psmouse)
794 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_DISABLE))
795 printk(KERN_WARNING "psmouse.c: Failed to deactivate mouse on %s\n",
796 psmouse->ps2dev.serio->phys);
798 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
803 * psmouse_cleanup() resets the mouse into power-on state.
806 static void psmouse_cleanup(struct serio *serio)
808 struct psmouse *psmouse = serio_get_drvdata(serio);
810 psmouse_reset(psmouse);
814 * psmouse_disconnect() closes and frees.
817 static void psmouse_disconnect(struct serio *serio)
819 struct psmouse *psmouse, *parent = NULL;
821 psmouse = serio_get_drvdata(serio);
823 sysfs_remove_group(&serio->dev.kobj, &psmouse_attribute_group);
827 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
829 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
830 parent = serio_get_drvdata(serio->parent);
831 psmouse_deactivate(parent);
834 if (psmouse->disconnect)
835 psmouse->disconnect(psmouse);
837 if (parent && parent->pt_deactivate)
838 parent->pt_deactivate(parent);
840 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
842 input_unregister_device(&psmouse->dev);
844 serio_set_drvdata(serio, NULL);
848 psmouse_activate(parent);
853 static int psmouse_switch_protocol(struct psmouse *psmouse, struct psmouse_protocol *proto)
855 memset(&psmouse->dev, 0, sizeof(struct input_dev));
857 init_input_dev(&psmouse->dev);
859 psmouse->dev.private = psmouse;
860 psmouse->dev.dev = &psmouse->ps2dev.serio->dev;
862 psmouse->dev.evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
863 psmouse->dev.keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_MIDDLE) | BIT(BTN_RIGHT);
864 psmouse->dev.relbit[0] = BIT(REL_X) | BIT(REL_Y);
866 psmouse->set_rate = psmouse_set_rate;
867 psmouse->set_resolution = psmouse_set_resolution;
868 psmouse->protocol_handler = psmouse_process_byte;
869 psmouse->pktsize = 3;
871 if (proto && (proto->detect || proto->init)) {
872 if (proto->detect && proto->detect(psmouse, 1) < 0)
875 if (proto->init && proto->init(psmouse) < 0)
878 psmouse->type = proto->type;
881 psmouse->type = psmouse_extensions(psmouse, psmouse_max_proto, 1);
883 sprintf(psmouse->devname, "%s %s %s",
884 psmouse_protocol_by_type(psmouse->type)->name, psmouse->vendor, psmouse->name);
886 psmouse->dev.name = psmouse->devname;
887 psmouse->dev.phys = psmouse->phys;
888 psmouse->dev.id.bustype = BUS_I8042;
889 psmouse->dev.id.vendor = 0x0002;
890 psmouse->dev.id.product = psmouse->type;
891 psmouse->dev.id.version = psmouse->model;
897 * psmouse_connect() is a callback from the serio module when
898 * an unhandled serio port is found.
900 static int psmouse_connect(struct serio *serio, struct serio_driver *drv)
902 struct psmouse *psmouse, *parent = NULL;
908 * If this is a pass-through port deactivate parent so the device
909 * connected to this port can be successfully identified
911 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
912 parent = serio_get_drvdata(serio->parent);
913 psmouse_deactivate(parent);
916 if (!(psmouse = kzalloc(sizeof(struct psmouse), GFP_KERNEL))) {
921 ps2_init(&psmouse->ps2dev, serio);
922 sprintf(psmouse->phys, "%s/input0", serio->phys);
924 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
926 serio_set_drvdata(serio, psmouse);
928 retval = serio_open(serio, drv);
930 serio_set_drvdata(serio, NULL);
935 if (psmouse_probe(psmouse) < 0) {
937 serio_set_drvdata(serio, NULL);
943 psmouse->rate = psmouse_rate;
944 psmouse->resolution = psmouse_resolution;
945 psmouse->resetafter = psmouse_resetafter;
946 psmouse->smartscroll = psmouse_smartscroll;
948 psmouse_switch_protocol(psmouse, NULL);
950 input_register_device(&psmouse->dev);
951 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);
953 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
955 psmouse_initialize(psmouse);
957 if (parent && parent->pt_activate)
958 parent->pt_activate(parent);
960 sysfs_create_group(&serio->dev.kobj, &psmouse_attribute_group);
962 psmouse_activate(psmouse);
967 /* If this is a pass-through port the parent needs to be re-activated */
969 psmouse_activate(parent);
976 static int psmouse_reconnect(struct serio *serio)
978 struct psmouse *psmouse = serio_get_drvdata(serio);
979 struct psmouse *parent = NULL;
980 struct serio_driver *drv = serio->drv;
983 if (!drv || !psmouse) {
984 printk(KERN_DEBUG "psmouse: reconnect request, but serio is disconnected, ignoring...\n");
990 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
991 parent = serio_get_drvdata(serio->parent);
992 psmouse_deactivate(parent);
995 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
997 if (psmouse->reconnect) {
998 if (psmouse->reconnect(psmouse))
1000 } else if (psmouse_probe(psmouse) < 0 ||
1001 psmouse->type != psmouse_extensions(psmouse, psmouse_max_proto, 0))
1004 /* ok, the device type (and capabilities) match the old one,
1005 * we can continue using it, complete intialization
1007 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1009 psmouse_initialize(psmouse);
1011 if (parent && parent->pt_activate)
1012 parent->pt_activate(parent);
1014 psmouse_activate(psmouse);
1018 /* If this is a pass-through port the parent waits to be activated */
1020 psmouse_activate(parent);
1026 static struct serio_device_id psmouse_serio_ids[] = {
1034 .type = SERIO_PS_PSTHRU,
1042 MODULE_DEVICE_TABLE(serio, psmouse_serio_ids);
1044 static struct serio_driver psmouse_drv = {
1048 .description = DRIVER_DESC,
1049 .id_table = psmouse_serio_ids,
1050 .interrupt = psmouse_interrupt,
1051 .connect = psmouse_connect,
1052 .reconnect = psmouse_reconnect,
1053 .disconnect = psmouse_disconnect,
1054 .cleanup = psmouse_cleanup,
1057 ssize_t psmouse_attr_show_helper(struct device *dev, struct device_attribute *devattr,
1060 struct serio *serio = to_serio_port(dev);
1061 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1062 struct psmouse *psmouse;
1065 retval = serio_pin_driver(serio);
1069 if (serio->drv != &psmouse_drv) {
1074 psmouse = serio_get_drvdata(serio);
1076 retval = attr->show(psmouse, attr->data, buf);
1079 serio_unpin_driver(serio);
1083 ssize_t psmouse_attr_set_helper(struct device *dev, struct device_attribute *devattr,
1084 const char *buf, size_t count)
1086 struct serio *serio = to_serio_port(dev);
1087 struct psmouse_attribute *attr = to_psmouse_attr(devattr);
1088 struct psmouse *psmouse, *parent = NULL;
1091 retval = serio_pin_driver(serio);
1095 if (serio->drv != &psmouse_drv) {
1100 retval = down_interruptible(&psmouse_sem);
1104 psmouse = serio_get_drvdata(serio);
1106 if (psmouse->state == PSMOUSE_IGNORE) {
1111 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1112 parent = serio_get_drvdata(serio->parent);
1113 psmouse_deactivate(parent);
1116 psmouse_deactivate(psmouse);
1118 retval = attr->set(psmouse, attr->data, buf, count);
1120 if (retval != -ENODEV)
1121 psmouse_activate(psmouse);
1124 psmouse_activate(parent);
1129 serio_unpin_driver(serio);
1133 static ssize_t psmouse_show_int_attr(struct psmouse *psmouse, void *offset, char *buf)
1135 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1137 return sprintf(buf, "%lu\n", *field);
1140 static ssize_t psmouse_set_int_attr(struct psmouse *psmouse, void *offset, const char *buf, size_t count)
1142 unsigned long *field = (unsigned long *)((char *)psmouse + (size_t)offset);
1143 unsigned long value;
1146 value = simple_strtoul(buf, &rest, 10);
1155 static ssize_t psmouse_attr_show_protocol(struct psmouse *psmouse, void *data, char *buf)
1157 return sprintf(buf, "%s\n", psmouse_protocol_by_type(psmouse->type)->name);
1160 static ssize_t psmouse_attr_set_protocol(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1162 struct serio *serio = psmouse->ps2dev.serio;
1163 struct psmouse *parent = NULL;
1164 struct psmouse_protocol *proto;
1167 if (!(proto = psmouse_protocol_by_name(buf, count)))
1170 if (psmouse->type == proto->type)
1173 while (serio->child) {
1175 printk(KERN_WARNING "psmouse: failed to destroy child port, protocol change aborted.\n");
1180 serio_unpin_driver(serio);
1181 serio_unregister_child_port(serio);
1182 serio_pin_driver_uninterruptible(serio);
1185 if (serio->drv != &psmouse_drv)
1188 if (psmouse->type == proto->type)
1189 return count; /* switched by other thread */
1192 if (serio->parent && serio->id.type == SERIO_PS_PSTHRU) {
1193 parent = serio_get_drvdata(serio->parent);
1194 if (parent->pt_deactivate)
1195 parent->pt_deactivate(parent);
1198 if (psmouse->disconnect)
1199 psmouse->disconnect(psmouse);
1201 psmouse_set_state(psmouse, PSMOUSE_IGNORE);
1202 input_unregister_device(&psmouse->dev);
1204 psmouse_set_state(psmouse, PSMOUSE_INITIALIZING);
1206 if (psmouse_switch_protocol(psmouse, proto) < 0) {
1207 psmouse_reset(psmouse);
1208 /* default to PSMOUSE_PS2 */
1209 psmouse_switch_protocol(psmouse, &psmouse_protocols[0]);
1212 psmouse_initialize(psmouse);
1213 psmouse_set_state(psmouse, PSMOUSE_CMD_MODE);
1215 input_register_device(&psmouse->dev);
1216 printk(KERN_INFO "input: %s on %s\n", psmouse->devname, serio->phys);
1218 if (parent && parent->pt_activate)
1219 parent->pt_activate(parent);
1224 static ssize_t psmouse_attr_set_rate(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1226 unsigned long value;
1229 value = simple_strtoul(buf, &rest, 10);
1233 psmouse->set_rate(psmouse, value);
1237 static ssize_t psmouse_attr_set_resolution(struct psmouse *psmouse, void *data, const char *buf, size_t count)
1239 unsigned long value;
1242 value = simple_strtoul(buf, &rest, 10);
1246 psmouse->set_resolution(psmouse, value);
1251 static int psmouse_set_maxproto(const char *val, struct kernel_param *kp)
1253 struct psmouse_protocol *proto;
1258 proto = psmouse_protocol_by_name(val, strlen(val));
1260 if (!proto || !proto->maxproto)
1263 *((unsigned int *)kp->arg) = proto->type;
1268 static int psmouse_get_maxproto(char *buffer, struct kernel_param *kp)
1270 int type = *((unsigned int *)kp->arg);
1272 return sprintf(buffer, "%s\n", psmouse_protocol_by_type(type)->name);
1275 static int __init psmouse_init(void)
1277 serio_register_driver(&psmouse_drv);
1281 static void __exit psmouse_exit(void)
1283 serio_unregister_driver(&psmouse_drv);
1286 module_init(psmouse_init);
1287 module_exit(psmouse_exit);