Linux-2.6.12-rc2
[linux-2.6.git] / drivers / input / mouse / synaptics.c
1 /*
2  * Synaptics TouchPad PS/2 mouse driver
3  *
4  *   2003 Dmitry Torokhov <dtor@mail.ru>
5  *     Added support for pass-through port. Special thanks to Peter Berg Larsen
6  *     for explaining various Synaptics quirks.
7  *
8  *   2003 Peter Osterlund <petero2@telia.com>
9  *     Ported to 2.5 input device infrastructure.
10  *
11  *   Copyright (C) 2001 Stefan Gmeiner <riddlebox@freesurf.ch>
12  *     start merging tpconfig and gpm code to a xfree-input module
13  *     adding some changes and extensions (ex. 3rd and 4th button)
14  *
15  *   Copyright (c) 1997 C. Scott Ananian <cananian@alumni.priceton.edu>
16  *   Copyright (c) 1998-2000 Bruce Kalk <kall@compass.com>
17  *     code for the special synaptics commands (from the tpconfig-source)
18  *
19  * This program is free software; you can redistribute it and/or modify it
20  * under the terms of the GNU General Public License version 2 as published by
21  * the Free Software Foundation.
22  *
23  * Trademarks are the property of their respective owners.
24  */
25
26 #include <linux/module.h>
27 #include <linux/input.h>
28 #include <linux/serio.h>
29 #include <linux/libps2.h>
30 #include "psmouse.h"
31 #include "synaptics.h"
32
33 /*
34  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
35  * section 2.3.2, which says that they should be valid regardless of the
36  * actual size of the sensor.
37  */
38 #define XMIN_NOMINAL 1472
39 #define XMAX_NOMINAL 5472
40 #define YMIN_NOMINAL 1408
41 #define YMAX_NOMINAL 4448
42
43 /*****************************************************************************
44  *      Synaptics communications functions
45  ****************************************************************************/
46
47 /*
48  * Send a command to the synpatics touchpad by special commands
49  */
50 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
51 {
52         if (psmouse_sliced_command(psmouse, c))
53                 return -1;
54         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
55                 return -1;
56         return 0;
57 }
58
59 /*
60  * Set the synaptics touchpad mode byte by special commands
61  */
62 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
63 {
64         unsigned char param[1];
65
66         if (psmouse_sliced_command(psmouse, mode))
67                 return -1;
68         param[0] = SYN_PS_SET_MODE2;
69         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
70                 return -1;
71         return 0;
72 }
73
74 /*
75  * Read the model-id bytes from the touchpad
76  * see also SYN_MODEL_* macros
77  */
78 static int synaptics_model_id(struct psmouse *psmouse)
79 {
80         struct synaptics_data *priv = psmouse->private;
81         unsigned char mi[3];
82
83         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
84                 return -1;
85         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
86         return 0;
87 }
88
89 /*
90  * Read the capability-bits from the touchpad
91  * see also the SYN_CAP_* macros
92  */
93 static int synaptics_capability(struct psmouse *psmouse)
94 {
95         struct synaptics_data *priv = psmouse->private;
96         unsigned char cap[3];
97
98         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
99                 return -1;
100         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
101         priv->ext_cap = 0;
102         if (!SYN_CAP_VALID(priv->capabilities))
103                 return -1;
104
105         /*
106          * Unless capExtended is set the rest of the flags should be ignored
107          */
108         if (!SYN_CAP_EXTENDED(priv->capabilities))
109                 priv->capabilities = 0;
110
111         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
112                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
113                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
114                                " but I'm not able to read them.");
115                 } else {
116                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
117
118                         /*
119                          * if nExtBtn is greater than 8 it should be considered
120                          * invalid and treated as 0
121                          */
122                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
123                                 priv->ext_cap &= 0xff0fff;
124                 }
125         }
126         return 0;
127 }
128
129 /*
130  * Identify Touchpad
131  * See also the SYN_ID_* macros
132  */
133 static int synaptics_identify(struct psmouse *psmouse)
134 {
135         struct synaptics_data *priv = psmouse->private;
136         unsigned char id[3];
137
138         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
139                 return -1;
140         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
141         if (SYN_ID_IS_SYNAPTICS(priv->identity))
142                 return 0;
143         return -1;
144 }
145
146 static void print_ident(struct synaptics_data *priv)
147 {
148         printk(KERN_INFO "Synaptics Touchpad, model: %ld\n", SYN_ID_MODEL(priv->identity));
149         printk(KERN_INFO " Firmware: %ld.%ld\n", SYN_ID_MAJOR(priv->identity),
150                SYN_ID_MINOR(priv->identity));
151         if (SYN_MODEL_ROT180(priv->model_id))
152                 printk(KERN_INFO " 180 degree mounted touchpad\n");
153         if (SYN_MODEL_PORTRAIT(priv->model_id))
154                 printk(KERN_INFO " portrait touchpad\n");
155         printk(KERN_INFO " Sensor: %ld\n", SYN_MODEL_SENSOR(priv->model_id));
156         if (SYN_MODEL_NEWABS(priv->model_id))
157                 printk(KERN_INFO " new absolute packet format\n");
158         if (SYN_MODEL_PEN(priv->model_id))
159                 printk(KERN_INFO " pen detection\n");
160
161         if (SYN_CAP_EXTENDED(priv->capabilities)) {
162                 printk(KERN_INFO " Touchpad has extended capability bits\n");
163                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap))
164                         printk(KERN_INFO " -> %d multi-buttons, i.e. besides standard buttons\n",
165                                (int)(SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap)));
166                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
167                         printk(KERN_INFO " -> middle button\n");
168                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities))
169                         printk(KERN_INFO " -> four buttons\n");
170                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
171                         printk(KERN_INFO " -> multifinger detection\n");
172                 if (SYN_CAP_PALMDETECT(priv->capabilities))
173                         printk(KERN_INFO " -> palm detection\n");
174                 if (SYN_CAP_PASS_THROUGH(priv->capabilities))
175                         printk(KERN_INFO " -> pass-through port\n");
176         }
177 }
178
179 static int synaptics_query_hardware(struct psmouse *psmouse)
180 {
181         int retries = 0;
182
183         while ((retries++ < 3) && psmouse_reset(psmouse))
184                 printk(KERN_ERR "synaptics reset failed\n");
185
186         if (synaptics_identify(psmouse))
187                 return -1;
188         if (synaptics_model_id(psmouse))
189                 return -1;
190         if (synaptics_capability(psmouse))
191                 return -1;
192
193         return 0;
194 }
195
196 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
197 {
198         struct synaptics_data *priv = psmouse->private;
199
200         priv->mode = SYN_BIT_ABSOLUTE_MODE;
201         if (SYN_ID_MAJOR(priv->identity) >= 4)
202                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
203         if (SYN_CAP_EXTENDED(priv->capabilities))
204                 priv->mode |= SYN_BIT_W_MODE;
205
206         if (synaptics_mode_cmd(psmouse, priv->mode))
207                 return -1;
208
209         return 0;
210 }
211
212 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
213 {
214         struct synaptics_data *priv = psmouse->private;
215
216         if (rate >= 80) {
217                 priv->mode |= SYN_BIT_HIGH_RATE;
218                 psmouse->rate = 80;
219         } else {
220                 priv->mode &= ~SYN_BIT_HIGH_RATE;
221                 psmouse->rate = 40;
222         }
223
224         synaptics_mode_cmd(psmouse, priv->mode);
225 }
226
227 /*****************************************************************************
228  *      Synaptics pass-through PS/2 port support
229  ****************************************************************************/
230 static int synaptics_pt_write(struct serio *serio, unsigned char c)
231 {
232         struct psmouse *parent = serio_get_drvdata(serio->parent);
233         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
234
235         if (psmouse_sliced_command(parent, c))
236                 return -1;
237         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
238                 return -1;
239         return 0;
240 }
241
242 static inline int synaptics_is_pt_packet(unsigned char *buf)
243 {
244         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
245 }
246
247 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
248 {
249         struct psmouse *child = serio_get_drvdata(ptport);
250
251         if (child && child->state == PSMOUSE_ACTIVATED) {
252                 serio_interrupt(ptport, packet[1], 0, NULL);
253                 serio_interrupt(ptport, packet[4], 0, NULL);
254                 serio_interrupt(ptport, packet[5], 0, NULL);
255                 if (child->type >= PSMOUSE_GENPS)
256                         serio_interrupt(ptport, packet[2], 0, NULL);
257         } else
258                 serio_interrupt(ptport, packet[1], 0, NULL);
259 }
260
261 static void synaptics_pt_activate(struct psmouse *psmouse)
262 {
263         struct serio *ptport = psmouse->ps2dev.serio->child;
264         struct psmouse *child = serio_get_drvdata(ptport);
265         struct synaptics_data *priv = psmouse->private;
266
267         /* adjust the touchpad to child's choice of protocol */
268         if (child) {
269                 if (child->type >= PSMOUSE_GENPS)
270                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
271                 else
272                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
273
274                 if (synaptics_mode_cmd(psmouse, priv->mode))
275                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
276         }
277 }
278
279 static void synaptics_pt_create(struct psmouse *psmouse)
280 {
281         struct serio *serio;
282
283         serio = kmalloc(sizeof(struct serio), GFP_KERNEL);
284         if (!serio) {
285                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
286                 return;
287         }
288
289         memset(serio, 0, sizeof(struct serio));
290
291         serio->id.type = SERIO_PS_PSTHRU;
292         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
293         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
294         serio->write = synaptics_pt_write;
295         serio->parent = psmouse->ps2dev.serio;
296
297         psmouse->pt_activate = synaptics_pt_activate;
298
299         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
300         serio_register_port(serio);
301 }
302
303 /*****************************************************************************
304  *      Functions to interpret the absolute mode packets
305  ****************************************************************************/
306
307 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
308 {
309         memset(hw, 0, sizeof(struct synaptics_hw_state));
310
311         if (SYN_MODEL_NEWABS(priv->model_id)) {
312                 hw->x = (((buf[3] & 0x10) << 8) |
313                          ((buf[1] & 0x0f) << 8) |
314                          buf[4]);
315                 hw->y = (((buf[3] & 0x20) << 7) |
316                          ((buf[1] & 0xf0) << 4) |
317                          buf[5]);
318
319                 hw->z = buf[2];
320                 hw->w = (((buf[0] & 0x30) >> 2) |
321                          ((buf[0] & 0x04) >> 1) |
322                          ((buf[3] & 0x04) >> 2));
323
324                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
325                 hw->right = (buf[0] & 0x02) ? 1 : 0;
326
327                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
328                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
329                         if (hw->w == 2)
330                                 hw->scroll = (signed char)(buf[1]);
331                 }
332
333                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
334                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
335                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
336                 }
337
338                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
339                     ((buf[0] ^ buf[3]) & 0x02)) {
340                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
341                         default:
342                                 /*
343                                  * if nExtBtn is greater than 8 it should be
344                                  * considered invalid and treated as 0
345                                  */
346                                 break;
347                         case 8:
348                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
349                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
350                         case 6:
351                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
352                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
353                         case 4:
354                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
355                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
356                         case 2:
357                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
358                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
359                         }
360                 }
361         } else {
362                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
363                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
364
365                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
366                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
367
368                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
369                 hw->right = (buf[0] & 0x02) ? 1 : 0;
370         }
371 }
372
373 /*
374  *  called for each full received packet from the touchpad
375  */
376 static void synaptics_process_packet(struct psmouse *psmouse)
377 {
378         struct input_dev *dev = &psmouse->dev;
379         struct synaptics_data *priv = psmouse->private;
380         struct synaptics_hw_state hw;
381         int num_fingers;
382         int finger_width;
383         int i;
384
385         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
386
387         if (hw.scroll) {
388                 priv->scroll += hw.scroll;
389
390                 while (priv->scroll >= 4) {
391                         input_report_key(dev, BTN_BACK, !hw.down);
392                         input_sync(dev);
393                         input_report_key(dev, BTN_BACK, hw.down);
394                         input_sync(dev);
395                         priv->scroll -= 4;
396                 }
397                 while (priv->scroll <= -4) {
398                         input_report_key(dev, BTN_FORWARD, !hw.up);
399                         input_sync(dev);
400                         input_report_key(dev, BTN_FORWARD, hw.up);
401                         input_sync(dev);
402                         priv->scroll += 4;
403                 }
404                 return;
405         }
406
407         if (hw.z > 0) {
408                 num_fingers = 1;
409                 finger_width = 5;
410                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
411                         switch (hw.w) {
412                         case 0 ... 1:
413                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
414                                         num_fingers = hw.w + 2;
415                                 break;
416                         case 2:
417                                 if (SYN_MODEL_PEN(priv->model_id))
418                                         ;   /* Nothing, treat a pen as a single finger */
419                                 break;
420                         case 4 ... 15:
421                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
422                                         finger_width = hw.w;
423                                 break;
424                         }
425                 }
426         } else {
427                 num_fingers = 0;
428                 finger_width = 0;
429         }
430
431         /* Post events
432          * BTN_TOUCH has to be first as mousedev relies on it when doing
433          * absolute -> relative conversion
434          */
435         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
436         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
437
438         if (hw.z > 0) {
439                 input_report_abs(dev, ABS_X, hw.x);
440                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
441         }
442         input_report_abs(dev, ABS_PRESSURE, hw.z);
443
444         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
445         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
446         input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
447         input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
448
449         input_report_key(dev, BTN_LEFT, hw.left);
450         input_report_key(dev, BTN_RIGHT, hw.right);
451
452         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
453                 input_report_key(dev, BTN_MIDDLE, hw.middle);
454
455         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
456                 input_report_key(dev, BTN_FORWARD, hw.up);
457                 input_report_key(dev, BTN_BACK, hw.down);
458         }
459
460         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
461                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
462
463         input_sync(dev);
464 }
465
466 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
467 {
468         static unsigned char newabs_mask[]      = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
469         static unsigned char newabs_rel_mask[]  = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
470         static unsigned char newabs_rslt[]      = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
471         static unsigned char oldabs_mask[]      = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
472         static unsigned char oldabs_rslt[]      = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
473
474         if (idx < 0 || idx > 4)
475                 return 0;
476
477         switch (pkt_type) {
478                 case SYN_NEWABS:
479                 case SYN_NEWABS_RELAXED:
480                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
481
482                 case SYN_NEWABS_STRICT:
483                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
484
485                 case SYN_OLDABS:
486                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
487
488                 default:
489                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
490                         return 0;
491         }
492 }
493
494 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
495 {
496         int i;
497
498         for (i = 0; i < 5; i++)
499                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
500                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
501                         return SYN_NEWABS_RELAXED;
502                 }
503
504         return SYN_NEWABS_STRICT;
505 }
506
507 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse, struct pt_regs *regs)
508 {
509         struct input_dev *dev = &psmouse->dev;
510         struct synaptics_data *priv = psmouse->private;
511
512         input_regs(dev, regs);
513
514         if (psmouse->pktcnt >= 6) { /* Full packet received */
515                 if (unlikely(priv->pkt_type == SYN_NEWABS))
516                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
517
518                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
519                         if (psmouse->ps2dev.serio->child)
520                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
521                 } else
522                         synaptics_process_packet(psmouse);
523
524                 return PSMOUSE_FULL_PACKET;
525         }
526
527         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
528                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
529 }
530
531 /*****************************************************************************
532  *      Driver initialization/cleanup functions
533  ****************************************************************************/
534 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
535 {
536         int i;
537
538         set_bit(EV_ABS, dev->evbit);
539         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
540         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
541         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
542         set_bit(ABS_TOOL_WIDTH, dev->absbit);
543
544         set_bit(EV_KEY, dev->evbit);
545         set_bit(BTN_TOUCH, dev->keybit);
546         set_bit(BTN_TOOL_FINGER, dev->keybit);
547         set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
548         set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
549
550         set_bit(BTN_LEFT, dev->keybit);
551         set_bit(BTN_RIGHT, dev->keybit);
552
553         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
554                 set_bit(BTN_MIDDLE, dev->keybit);
555
556         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
557             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
558                 set_bit(BTN_FORWARD, dev->keybit);
559                 set_bit(BTN_BACK, dev->keybit);
560         }
561
562         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
563                 set_bit(BTN_0 + i, dev->keybit);
564
565         clear_bit(EV_REL, dev->evbit);
566         clear_bit(REL_X, dev->relbit);
567         clear_bit(REL_Y, dev->relbit);
568 }
569
570 void synaptics_reset(struct psmouse *psmouse)
571 {
572         /* reset touchpad back to relative mode, gestures enabled */
573         synaptics_mode_cmd(psmouse, 0);
574 }
575
576 static void synaptics_disconnect(struct psmouse *psmouse)
577 {
578         synaptics_reset(psmouse);
579         kfree(psmouse->private);
580         psmouse->private = NULL;
581 }
582
583 static int synaptics_reconnect(struct psmouse *psmouse)
584 {
585         struct synaptics_data *priv = psmouse->private;
586         struct synaptics_data old_priv = *priv;
587
588         if (synaptics_detect(psmouse, 0))
589                 return -1;
590
591         if (synaptics_query_hardware(psmouse)) {
592                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
593                 return -1;
594         }
595
596         if (old_priv.identity != priv->identity ||
597             old_priv.model_id != priv->model_id ||
598             old_priv.capabilities != priv->capabilities ||
599             old_priv.ext_cap != priv->ext_cap)
600                 return -1;
601
602         if (synaptics_set_absolute_mode(psmouse)) {
603                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
604                 return -1;
605         }
606
607         return 0;
608 }
609
610 int synaptics_detect(struct psmouse *psmouse, int set_properties)
611 {
612         struct ps2dev *ps2dev = &psmouse->ps2dev;
613         unsigned char param[4];
614
615         param[0] = 0;
616
617         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
618         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
619         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
620         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
621         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
622
623         if (param[1] != 0x47)
624                 return -1;
625
626         if (set_properties) {
627                 psmouse->vendor = "Synaptics";
628                 psmouse->name = "TouchPad";
629         }
630
631         return 0;
632 }
633
634 #if defined(__i386__)
635 #include <linux/dmi.h>
636 static struct dmi_system_id toshiba_dmi_table[] = {
637         {
638                 .ident = "Toshiba Satellite",
639                 .matches = {
640                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
641                         DMI_MATCH(DMI_PRODUCT_NAME , "Satellite"),
642                 },
643         },
644         { }
645 };
646 #endif
647
648 int synaptics_init(struct psmouse *psmouse)
649 {
650         struct synaptics_data *priv;
651
652         psmouse->private = priv = kmalloc(sizeof(struct synaptics_data), GFP_KERNEL);
653         if (!priv)
654                 return -1;
655         memset(priv, 0, sizeof(struct synaptics_data));
656
657         if (synaptics_query_hardware(psmouse)) {
658                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
659                 goto init_fail;
660         }
661
662         if (synaptics_set_absolute_mode(psmouse)) {
663                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
664                 goto init_fail;
665         }
666
667         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
668
669         print_ident(priv);
670         set_input_params(&psmouse->dev, priv);
671
672         psmouse->protocol_handler = synaptics_process_byte;
673         psmouse->set_rate = synaptics_set_rate;
674         psmouse->disconnect = synaptics_disconnect;
675         psmouse->reconnect = synaptics_reconnect;
676         psmouse->pktsize = 6;
677
678         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
679                 synaptics_pt_create(psmouse);
680
681 #if defined(__i386__)
682         /*
683          * Toshiba's KBC seems to have trouble handling data from
684          * Synaptics as full rate, switch to lower rate which is roughly
685          * thye same as rate of standard PS/2 mouse.
686          */
687         if (psmouse->rate >= 80 && dmi_check_system(toshiba_dmi_table)) {
688                 printk(KERN_INFO "synaptics: Toshiba Satellite detected, limiting rate to 40pps.\n");
689                 psmouse->rate = 40;
690         }
691 #endif
692
693         return 0;
694
695  init_fail:
696         kfree(priv);
697         return -1;
698 }
699
700