Input: psmouse - do not carry DMI data around
[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/dmi.h>
28 #include <linux/input.h>
29 #include <linux/serio.h>
30 #include <linux/libps2.h>
31 #include "psmouse.h"
32 #include "synaptics.h"
33
34 /*
35  * The x/y limits are taken from the Synaptics TouchPad interfacing Guide,
36  * section 2.3.2, which says that they should be valid regardless of the
37  * actual size of the sensor.
38  */
39 #define XMIN_NOMINAL 1472
40 #define XMAX_NOMINAL 5472
41 #define YMIN_NOMINAL 1408
42 #define YMAX_NOMINAL 4448
43
44
45 /*****************************************************************************
46  *      Stuff we need even when we do not want native Synaptics support
47  ****************************************************************************/
48
49 /*
50  * Set the synaptics touchpad mode byte by special commands
51  */
52 static int synaptics_mode_cmd(struct psmouse *psmouse, unsigned char mode)
53 {
54         unsigned char param[1];
55
56         if (psmouse_sliced_command(psmouse, mode))
57                 return -1;
58         param[0] = SYN_PS_SET_MODE2;
59         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_SETRATE))
60                 return -1;
61         return 0;
62 }
63
64 int synaptics_detect(struct psmouse *psmouse, bool set_properties)
65 {
66         struct ps2dev *ps2dev = &psmouse->ps2dev;
67         unsigned char param[4];
68
69         param[0] = 0;
70
71         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
72         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
73         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
74         ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES);
75         ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO);
76
77         if (param[1] != 0x47)
78                 return -ENODEV;
79
80         if (set_properties) {
81                 psmouse->vendor = "Synaptics";
82                 psmouse->name = "TouchPad";
83         }
84
85         return 0;
86 }
87
88 void synaptics_reset(struct psmouse *psmouse)
89 {
90         /* reset touchpad back to relative mode, gestures enabled */
91         synaptics_mode_cmd(psmouse, 0);
92 }
93
94 #ifdef CONFIG_MOUSE_PS2_SYNAPTICS
95
96 /*****************************************************************************
97  *      Synaptics communications functions
98  ****************************************************************************/
99
100 /*
101  * Send a command to the synpatics touchpad by special commands
102  */
103 static int synaptics_send_cmd(struct psmouse *psmouse, unsigned char c, unsigned char *param)
104 {
105         if (psmouse_sliced_command(psmouse, c))
106                 return -1;
107         if (ps2_command(&psmouse->ps2dev, param, PSMOUSE_CMD_GETINFO))
108                 return -1;
109         return 0;
110 }
111
112 /*
113  * Read the model-id bytes from the touchpad
114  * see also SYN_MODEL_* macros
115  */
116 static int synaptics_model_id(struct psmouse *psmouse)
117 {
118         struct synaptics_data *priv = psmouse->private;
119         unsigned char mi[3];
120
121         if (synaptics_send_cmd(psmouse, SYN_QUE_MODEL, mi))
122                 return -1;
123         priv->model_id = (mi[0]<<16) | (mi[1]<<8) | mi[2];
124         return 0;
125 }
126
127 /*
128  * Read the capability-bits from the touchpad
129  * see also the SYN_CAP_* macros
130  */
131 static int synaptics_capability(struct psmouse *psmouse)
132 {
133         struct synaptics_data *priv = psmouse->private;
134         unsigned char cap[3];
135
136         if (synaptics_send_cmd(psmouse, SYN_QUE_CAPABILITIES, cap))
137                 return -1;
138         priv->capabilities = (cap[0] << 16) | (cap[1] << 8) | cap[2];
139         priv->ext_cap = 0;
140         if (!SYN_CAP_VALID(priv->capabilities))
141                 return -1;
142
143         /*
144          * Unless capExtended is set the rest of the flags should be ignored
145          */
146         if (!SYN_CAP_EXTENDED(priv->capabilities))
147                 priv->capabilities = 0;
148
149         if (SYN_EXT_CAP_REQUESTS(priv->capabilities) >= 1) {
150                 if (synaptics_send_cmd(psmouse, SYN_QUE_EXT_CAPAB, cap)) {
151                         printk(KERN_ERR "Synaptics claims to have extended capabilities,"
152                                " but I'm not able to read them.");
153                 } else {
154                         priv->ext_cap = (cap[0] << 16) | (cap[1] << 8) | cap[2];
155
156                         /*
157                          * if nExtBtn is greater than 8 it should be considered
158                          * invalid and treated as 0
159                          */
160                         if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) > 8)
161                                 priv->ext_cap &= 0xff0fff;
162                 }
163         }
164         return 0;
165 }
166
167 /*
168  * Identify Touchpad
169  * See also the SYN_ID_* macros
170  */
171 static int synaptics_identify(struct psmouse *psmouse)
172 {
173         struct synaptics_data *priv = psmouse->private;
174         unsigned char id[3];
175
176         if (synaptics_send_cmd(psmouse, SYN_QUE_IDENTIFY, id))
177                 return -1;
178         priv->identity = (id[0]<<16) | (id[1]<<8) | id[2];
179         if (SYN_ID_IS_SYNAPTICS(priv->identity))
180                 return 0;
181         return -1;
182 }
183
184 /*
185  * Read touchpad resolution
186  * Resolution is left zero if touchpad does not support the query
187  */
188 static int synaptics_resolution(struct psmouse *psmouse)
189 {
190         struct synaptics_data *priv = psmouse->private;
191         unsigned char res[3];
192
193         if (SYN_ID_MAJOR(priv->identity) < 4)
194                 return 0;
195
196         if (synaptics_send_cmd(psmouse, SYN_QUE_RESOLUTION, res))
197                 return 0;
198
199         if ((res[0] != 0) && (res[1] & 0x80) && (res[2] != 0)) {
200                 priv->x_res = res[0]; /* x resolution in units/mm */
201                 priv->y_res = res[2]; /* y resolution in units/mm */
202         }
203
204         return 0;
205 }
206
207 static int synaptics_query_hardware(struct psmouse *psmouse)
208 {
209         if (synaptics_identify(psmouse))
210                 return -1;
211         if (synaptics_model_id(psmouse))
212                 return -1;
213         if (synaptics_capability(psmouse))
214                 return -1;
215         if (synaptics_resolution(psmouse))
216                 return -1;
217
218         return 0;
219 }
220
221 static int synaptics_set_absolute_mode(struct psmouse *psmouse)
222 {
223         struct synaptics_data *priv = psmouse->private;
224
225         priv->mode = SYN_BIT_ABSOLUTE_MODE;
226         if (SYN_ID_MAJOR(priv->identity) >= 4)
227                 priv->mode |= SYN_BIT_DISABLE_GESTURE;
228         if (SYN_CAP_EXTENDED(priv->capabilities))
229                 priv->mode |= SYN_BIT_W_MODE;
230
231         if (synaptics_mode_cmd(psmouse, priv->mode))
232                 return -1;
233
234         return 0;
235 }
236
237 static void synaptics_set_rate(struct psmouse *psmouse, unsigned int rate)
238 {
239         struct synaptics_data *priv = psmouse->private;
240
241         if (rate >= 80) {
242                 priv->mode |= SYN_BIT_HIGH_RATE;
243                 psmouse->rate = 80;
244         } else {
245                 priv->mode &= ~SYN_BIT_HIGH_RATE;
246                 psmouse->rate = 40;
247         }
248
249         synaptics_mode_cmd(psmouse, priv->mode);
250 }
251
252 /*****************************************************************************
253  *      Synaptics pass-through PS/2 port support
254  ****************************************************************************/
255 static int synaptics_pt_write(struct serio *serio, unsigned char c)
256 {
257         struct psmouse *parent = serio_get_drvdata(serio->parent);
258         char rate_param = SYN_PS_CLIENT_CMD; /* indicates that we want pass-through port */
259
260         if (psmouse_sliced_command(parent, c))
261                 return -1;
262         if (ps2_command(&parent->ps2dev, &rate_param, PSMOUSE_CMD_SETRATE))
263                 return -1;
264         return 0;
265 }
266
267 static inline int synaptics_is_pt_packet(unsigned char *buf)
268 {
269         return (buf[0] & 0xFC) == 0x84 && (buf[3] & 0xCC) == 0xC4;
270 }
271
272 static void synaptics_pass_pt_packet(struct serio *ptport, unsigned char *packet)
273 {
274         struct psmouse *child = serio_get_drvdata(ptport);
275
276         if (child && child->state == PSMOUSE_ACTIVATED) {
277                 serio_interrupt(ptport, packet[1], 0);
278                 serio_interrupt(ptport, packet[4], 0);
279                 serio_interrupt(ptport, packet[5], 0);
280                 if (child->pktsize == 4)
281                         serio_interrupt(ptport, packet[2], 0);
282         } else
283                 serio_interrupt(ptport, packet[1], 0);
284 }
285
286 static void synaptics_pt_activate(struct psmouse *psmouse)
287 {
288         struct serio *ptport = psmouse->ps2dev.serio->child;
289         struct psmouse *child = serio_get_drvdata(ptport);
290         struct synaptics_data *priv = psmouse->private;
291
292         /* adjust the touchpad to child's choice of protocol */
293         if (child) {
294                 if (child->pktsize == 4)
295                         priv->mode |= SYN_BIT_FOUR_BYTE_CLIENT;
296                 else
297                         priv->mode &= ~SYN_BIT_FOUR_BYTE_CLIENT;
298
299                 if (synaptics_mode_cmd(psmouse, priv->mode))
300                         printk(KERN_INFO "synaptics: failed to switch guest protocol\n");
301         }
302 }
303
304 static void synaptics_pt_create(struct psmouse *psmouse)
305 {
306         struct serio *serio;
307
308         serio = kzalloc(sizeof(struct serio), GFP_KERNEL);
309         if (!serio) {
310                 printk(KERN_ERR "synaptics: not enough memory to allocate pass-through port\n");
311                 return;
312         }
313
314         serio->id.type = SERIO_PS_PSTHRU;
315         strlcpy(serio->name, "Synaptics pass-through", sizeof(serio->name));
316         strlcpy(serio->phys, "synaptics-pt/serio0", sizeof(serio->name));
317         serio->write = synaptics_pt_write;
318         serio->parent = psmouse->ps2dev.serio;
319
320         psmouse->pt_activate = synaptics_pt_activate;
321
322         printk(KERN_INFO "serio: %s port at %s\n", serio->name, psmouse->phys);
323         serio_register_port(serio);
324 }
325
326 /*****************************************************************************
327  *      Functions to interpret the absolute mode packets
328  ****************************************************************************/
329
330 static void synaptics_parse_hw_state(unsigned char buf[], struct synaptics_data *priv, struct synaptics_hw_state *hw)
331 {
332         memset(hw, 0, sizeof(struct synaptics_hw_state));
333
334         if (SYN_MODEL_NEWABS(priv->model_id)) {
335                 hw->x = (((buf[3] & 0x10) << 8) |
336                          ((buf[1] & 0x0f) << 8) |
337                          buf[4]);
338                 hw->y = (((buf[3] & 0x20) << 7) |
339                          ((buf[1] & 0xf0) << 4) |
340                          buf[5]);
341
342                 hw->z = buf[2];
343                 hw->w = (((buf[0] & 0x30) >> 2) |
344                          ((buf[0] & 0x04) >> 1) |
345                          ((buf[3] & 0x04) >> 2));
346
347                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
348                 hw->right = (buf[0] & 0x02) ? 1 : 0;
349
350                 if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
351                         hw->middle = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
352                         if (hw->w == 2)
353                                 hw->scroll = (signed char)(buf[1]);
354                 }
355
356                 if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
357                         hw->up   = ((buf[0] ^ buf[3]) & 0x01) ? 1 : 0;
358                         hw->down = ((buf[0] ^ buf[3]) & 0x02) ? 1 : 0;
359                 }
360
361                 if (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) &&
362                     ((buf[0] ^ buf[3]) & 0x02)) {
363                         switch (SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap) & ~0x01) {
364                         default:
365                                 /*
366                                  * if nExtBtn is greater than 8 it should be
367                                  * considered invalid and treated as 0
368                                  */
369                                 break;
370                         case 8:
371                                 hw->ext_buttons |= ((buf[5] & 0x08)) ? 0x80 : 0;
372                                 hw->ext_buttons |= ((buf[4] & 0x08)) ? 0x40 : 0;
373                         case 6:
374                                 hw->ext_buttons |= ((buf[5] & 0x04)) ? 0x20 : 0;
375                                 hw->ext_buttons |= ((buf[4] & 0x04)) ? 0x10 : 0;
376                         case 4:
377                                 hw->ext_buttons |= ((buf[5] & 0x02)) ? 0x08 : 0;
378                                 hw->ext_buttons |= ((buf[4] & 0x02)) ? 0x04 : 0;
379                         case 2:
380                                 hw->ext_buttons |= ((buf[5] & 0x01)) ? 0x02 : 0;
381                                 hw->ext_buttons |= ((buf[4] & 0x01)) ? 0x01 : 0;
382                         }
383                 }
384         } else {
385                 hw->x = (((buf[1] & 0x1f) << 8) | buf[2]);
386                 hw->y = (((buf[4] & 0x1f) << 8) | buf[5]);
387
388                 hw->z = (((buf[0] & 0x30) << 2) | (buf[3] & 0x3F));
389                 hw->w = (((buf[1] & 0x80) >> 4) | ((buf[0] & 0x04) >> 1));
390
391                 hw->left  = (buf[0] & 0x01) ? 1 : 0;
392                 hw->right = (buf[0] & 0x02) ? 1 : 0;
393         }
394 }
395
396 /*
397  *  called for each full received packet from the touchpad
398  */
399 static void synaptics_process_packet(struct psmouse *psmouse)
400 {
401         struct input_dev *dev = psmouse->dev;
402         struct synaptics_data *priv = psmouse->private;
403         struct synaptics_hw_state hw;
404         int num_fingers;
405         int finger_width;
406         int i;
407
408         synaptics_parse_hw_state(psmouse->packet, priv, &hw);
409
410         if (hw.scroll) {
411                 priv->scroll += hw.scroll;
412
413                 while (priv->scroll >= 4) {
414                         input_report_key(dev, BTN_BACK, !hw.down);
415                         input_sync(dev);
416                         input_report_key(dev, BTN_BACK, hw.down);
417                         input_sync(dev);
418                         priv->scroll -= 4;
419                 }
420                 while (priv->scroll <= -4) {
421                         input_report_key(dev, BTN_FORWARD, !hw.up);
422                         input_sync(dev);
423                         input_report_key(dev, BTN_FORWARD, hw.up);
424                         input_sync(dev);
425                         priv->scroll += 4;
426                 }
427                 return;
428         }
429
430         if (hw.z > 0) {
431                 num_fingers = 1;
432                 finger_width = 5;
433                 if (SYN_CAP_EXTENDED(priv->capabilities)) {
434                         switch (hw.w) {
435                         case 0 ... 1:
436                                 if (SYN_CAP_MULTIFINGER(priv->capabilities))
437                                         num_fingers = hw.w + 2;
438                                 break;
439                         case 2:
440                                 if (SYN_MODEL_PEN(priv->model_id))
441                                         ;   /* Nothing, treat a pen as a single finger */
442                                 break;
443                         case 4 ... 15:
444                                 if (SYN_CAP_PALMDETECT(priv->capabilities))
445                                         finger_width = hw.w;
446                                 break;
447                         }
448                 }
449         } else {
450                 num_fingers = 0;
451                 finger_width = 0;
452         }
453
454         /* Post events
455          * BTN_TOUCH has to be first as mousedev relies on it when doing
456          * absolute -> relative conversion
457          */
458         if (hw.z > 30) input_report_key(dev, BTN_TOUCH, 1);
459         if (hw.z < 25) input_report_key(dev, BTN_TOUCH, 0);
460
461         if (hw.z > 0) {
462                 input_report_abs(dev, ABS_X, hw.x);
463                 input_report_abs(dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - hw.y);
464         }
465         input_report_abs(dev, ABS_PRESSURE, hw.z);
466
467         input_report_abs(dev, ABS_TOOL_WIDTH, finger_width);
468         input_report_key(dev, BTN_TOOL_FINGER, num_fingers == 1);
469         input_report_key(dev, BTN_LEFT, hw.left);
470         input_report_key(dev, BTN_RIGHT, hw.right);
471
472         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
473                 input_report_key(dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
474                 input_report_key(dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
475         }
476
477         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
478                 input_report_key(dev, BTN_MIDDLE, hw.middle);
479
480         if (SYN_CAP_FOUR_BUTTON(priv->capabilities)) {
481                 input_report_key(dev, BTN_FORWARD, hw.up);
482                 input_report_key(dev, BTN_BACK, hw.down);
483         }
484
485         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
486                 input_report_key(dev, BTN_0 + i, hw.ext_buttons & (1 << i));
487
488         input_sync(dev);
489 }
490
491 static int synaptics_validate_byte(unsigned char packet[], int idx, unsigned char pkt_type)
492 {
493         static const unsigned char newabs_mask[]        = { 0xC8, 0x00, 0x00, 0xC8, 0x00 };
494         static const unsigned char newabs_rel_mask[]    = { 0xC0, 0x00, 0x00, 0xC0, 0x00 };
495         static const unsigned char newabs_rslt[]        = { 0x80, 0x00, 0x00, 0xC0, 0x00 };
496         static const unsigned char oldabs_mask[]        = { 0xC0, 0x60, 0x00, 0xC0, 0x60 };
497         static const unsigned char oldabs_rslt[]        = { 0xC0, 0x00, 0x00, 0x80, 0x00 };
498
499         if (idx < 0 || idx > 4)
500                 return 0;
501
502         switch (pkt_type) {
503                 case SYN_NEWABS:
504                 case SYN_NEWABS_RELAXED:
505                         return (packet[idx] & newabs_rel_mask[idx]) == newabs_rslt[idx];
506
507                 case SYN_NEWABS_STRICT:
508                         return (packet[idx] & newabs_mask[idx]) == newabs_rslt[idx];
509
510                 case SYN_OLDABS:
511                         return (packet[idx] & oldabs_mask[idx]) == oldabs_rslt[idx];
512
513                 default:
514                         printk(KERN_ERR "synaptics: unknown packet type %d\n", pkt_type);
515                         return 0;
516         }
517 }
518
519 static unsigned char synaptics_detect_pkt_type(struct psmouse *psmouse)
520 {
521         int i;
522
523         for (i = 0; i < 5; i++)
524                 if (!synaptics_validate_byte(psmouse->packet, i, SYN_NEWABS_STRICT)) {
525                         printk(KERN_INFO "synaptics: using relaxed packet validation\n");
526                         return SYN_NEWABS_RELAXED;
527                 }
528
529         return SYN_NEWABS_STRICT;
530 }
531
532 static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse)
533 {
534         struct synaptics_data *priv = psmouse->private;
535
536         if (psmouse->pktcnt >= 6) { /* Full packet received */
537                 if (unlikely(priv->pkt_type == SYN_NEWABS))
538                         priv->pkt_type = synaptics_detect_pkt_type(psmouse);
539
540                 if (SYN_CAP_PASS_THROUGH(priv->capabilities) && synaptics_is_pt_packet(psmouse->packet)) {
541                         if (psmouse->ps2dev.serio->child)
542                                 synaptics_pass_pt_packet(psmouse->ps2dev.serio->child, psmouse->packet);
543                 } else
544                         synaptics_process_packet(psmouse);
545
546                 return PSMOUSE_FULL_PACKET;
547         }
548
549         return synaptics_validate_byte(psmouse->packet, psmouse->pktcnt - 1, priv->pkt_type) ?
550                 PSMOUSE_GOOD_DATA : PSMOUSE_BAD_DATA;
551 }
552
553 /*****************************************************************************
554  *      Driver initialization/cleanup functions
555  ****************************************************************************/
556 static void set_input_params(struct input_dev *dev, struct synaptics_data *priv)
557 {
558         int i;
559
560         __set_bit(EV_ABS, dev->evbit);
561         input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
562         input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
563         input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0);
564         __set_bit(ABS_TOOL_WIDTH, dev->absbit);
565
566         __set_bit(EV_KEY, dev->evbit);
567         __set_bit(BTN_TOUCH, dev->keybit);
568         __set_bit(BTN_TOOL_FINGER, dev->keybit);
569         __set_bit(BTN_LEFT, dev->keybit);
570         __set_bit(BTN_RIGHT, dev->keybit);
571
572         if (SYN_CAP_MULTIFINGER(priv->capabilities)) {
573                 __set_bit(BTN_TOOL_DOUBLETAP, dev->keybit);
574                 __set_bit(BTN_TOOL_TRIPLETAP, dev->keybit);
575         }
576
577         if (SYN_CAP_MIDDLE_BUTTON(priv->capabilities))
578                 __set_bit(BTN_MIDDLE, dev->keybit);
579
580         if (SYN_CAP_FOUR_BUTTON(priv->capabilities) ||
581             SYN_CAP_MIDDLE_BUTTON(priv->capabilities)) {
582                 __set_bit(BTN_FORWARD, dev->keybit);
583                 __set_bit(BTN_BACK, dev->keybit);
584         }
585
586         for (i = 0; i < SYN_CAP_MULTI_BUTTON_NO(priv->ext_cap); i++)
587                 __set_bit(BTN_0 + i, dev->keybit);
588
589         __clear_bit(EV_REL, dev->evbit);
590         __clear_bit(REL_X, dev->relbit);
591         __clear_bit(REL_Y, dev->relbit);
592
593         dev->absres[ABS_X] = priv->x_res;
594         dev->absres[ABS_Y] = priv->y_res;
595 }
596
597 static void synaptics_disconnect(struct psmouse *psmouse)
598 {
599         synaptics_reset(psmouse);
600         kfree(psmouse->private);
601         psmouse->private = NULL;
602 }
603
604 static int synaptics_reconnect(struct psmouse *psmouse)
605 {
606         struct synaptics_data *priv = psmouse->private;
607         struct synaptics_data old_priv = *priv;
608
609         psmouse_reset(psmouse);
610
611         if (synaptics_detect(psmouse, 0))
612                 return -1;
613
614         if (synaptics_query_hardware(psmouse)) {
615                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
616                 return -1;
617         }
618
619         if (old_priv.identity != priv->identity ||
620             old_priv.model_id != priv->model_id ||
621             old_priv.capabilities != priv->capabilities ||
622             old_priv.ext_cap != priv->ext_cap)
623                 return -1;
624
625         if (synaptics_set_absolute_mode(psmouse)) {
626                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
627                 return -1;
628         }
629
630         return 0;
631 }
632
633 static bool impaired_toshiba_kbc;
634
635 static const struct dmi_system_id __initconst toshiba_dmi_table[] = {
636 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
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                 .ident = "Toshiba Dynabook",
646                 .matches = {
647                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
648                         DMI_MATCH(DMI_PRODUCT_NAME, "dynabook"),
649                 },
650         },
651         {
652                 .ident = "Toshiba Portege M300",
653                 .matches = {
654                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
655                         DMI_MATCH(DMI_PRODUCT_NAME, "PORTEGE M300"),
656                 },
657
658         },
659         {
660                 .ident = "Toshiba Portege M300",
661                 .matches = {
662                         DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
663                         DMI_MATCH(DMI_PRODUCT_NAME, "Portable PC"),
664                         DMI_MATCH(DMI_PRODUCT_VERSION, "Version 1.0"),
665                 },
666
667         },
668         { }
669 #endif
670 };
671
672 void __init synaptics_module_init(void)
673 {
674         impaired_toshiba_kbc = dmi_check_system(toshiba_dmi_table);
675 }
676
677 int synaptics_init(struct psmouse *psmouse)
678 {
679         struct synaptics_data *priv;
680
681         psmouse->private = priv = kzalloc(sizeof(struct synaptics_data), GFP_KERNEL);
682         if (!priv)
683                 return -1;
684
685         psmouse_reset(psmouse);
686
687         if (synaptics_query_hardware(psmouse)) {
688                 printk(KERN_ERR "Unable to query Synaptics hardware.\n");
689                 goto init_fail;
690         }
691
692         if (synaptics_set_absolute_mode(psmouse)) {
693                 printk(KERN_ERR "Unable to initialize Synaptics hardware.\n");
694                 goto init_fail;
695         }
696
697         priv->pkt_type = SYN_MODEL_NEWABS(priv->model_id) ? SYN_NEWABS : SYN_OLDABS;
698
699         printk(KERN_INFO "Synaptics Touchpad, model: %ld, fw: %ld.%ld, id: %#lx, caps: %#lx/%#lx\n",
700                 SYN_ID_MODEL(priv->identity),
701                 SYN_ID_MAJOR(priv->identity), SYN_ID_MINOR(priv->identity),
702                 priv->model_id, priv->capabilities, priv->ext_cap);
703
704         set_input_params(psmouse->dev, priv);
705
706         /*
707          * Encode touchpad model so that it can be used to set
708          * input device->id.version and be visible to userspace.
709          * Because version is __u16 we have to drop something.
710          * Hardware info bits seem to be good candidates as they
711          * are documented to be for Synaptics corp. internal use.
712          */
713         psmouse->model = ((priv->model_id & 0x00ff0000) >> 8) |
714                           (priv->model_id & 0x000000ff);
715
716         psmouse->protocol_handler = synaptics_process_byte;
717         psmouse->set_rate = synaptics_set_rate;
718         psmouse->disconnect = synaptics_disconnect;
719         psmouse->reconnect = synaptics_reconnect;
720         psmouse->cleanup = synaptics_reset;
721         psmouse->pktsize = 6;
722         /* Synaptics can usually stay in sync without extra help */
723         psmouse->resync_time = 0;
724
725         if (SYN_CAP_PASS_THROUGH(priv->capabilities))
726                 synaptics_pt_create(psmouse);
727
728         /*
729          * Toshiba's KBC seems to have trouble handling data from
730          * Synaptics as full rate, switch to lower rate which is roughly
731          * thye same as rate of standard PS/2 mouse.
732          */
733         if (psmouse->rate >= 80 && impaired_toshiba_kbc) {
734                 printk(KERN_INFO "synaptics: Toshiba %s detected, limiting rate to 40pps.\n",
735                         dmi_get_system_info(DMI_PRODUCT_NAME));
736                 psmouse->rate = 40;
737         }
738
739         return 0;
740
741  init_fail:
742         kfree(priv);
743         return -1;
744 }
745
746 #else /* CONFIG_MOUSE_PS2_SYNAPTICS */
747
748 void __init synaptics_module_init(void)
749 {
750 }
751
752 int synaptics_init(struct psmouse *psmouse)
753 {
754         return -ENOSYS;
755 }
756
757 #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */
758