Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
[sfrench/cifs-2.6.git] / drivers / input / mouse / alps.c
1 /*
2  * ALPS touchpad PS/2 mouse driver
3  *
4  * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
5  * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
6  * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
7  * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
8  * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
9  *
10  * ALPS detection, tap switching and status querying info is taken from
11  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
12  *
13  * This program is free software; you can redistribute it and/or modify it
14  * under the terms of the GNU General Public License version 2 as published by
15  * the Free Software Foundation.
16  */
17
18 #include <linux/slab.h>
19 #include <linux/input.h>
20 #include <linux/input/mt.h>
21 #include <linux/serio.h>
22 #include <linux/libps2.h>
23 #include <linux/dmi.h>
24
25 #include "psmouse.h"
26 #include "alps.h"
27
28 /*
29  * Definitions for ALPS version 3 and 4 command mode protocol
30  */
31 #define ALPS_CMD_NIBBLE_10      0x01f2
32
33 #define ALPS_REG_BASE_RUSHMORE  0xc2c0
34 #define ALPS_REG_BASE_PINNACLE  0x0000
35
36 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
37         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
38         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
39         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
40         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
41         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
42         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
43         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
44         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
45         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
46         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
47         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
48         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
49         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
50         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
51         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
52         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
53 };
54
55 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
56         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
57         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
58         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
59         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
60         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
61         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
62         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
63         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
64         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
65         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
66         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
67         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
68         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
69         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
70         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
71         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
72 };
73
74 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
75         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
76         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
77         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
78         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
79         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
80         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
81         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
82         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
83         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
84         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
85         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
86         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
87         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
88         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
89         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
90         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
91 };
92
93
94 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
95 #define ALPS_PASS               0x04    /* device has a pass-through port */
96
97 #define ALPS_WHEEL              0x08    /* hardware wheel present */
98 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
99 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
100 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
101 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
102                                            6-byte ALPS packet */
103 #define ALPS_DELL               0x100   /* device is a Dell laptop */
104 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
105
106 static const struct alps_model_info alps_model_data[] = {
107         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
108         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
109         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
110         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
111         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
112         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
113         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
114         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
115         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
116         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
117         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
118         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
119         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
120         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
121         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
122
123         /*
124          * XXX This entry is suspicious. First byte has zero lower nibble,
125          * which is what a normal mouse would report. Also, the value 0x0e
126          * isn't valid per PS/2 spec.
127          */
128         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
129
130         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
131         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
132         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
133         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
134                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
135         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
136         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
137         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
138                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
139         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
140 };
141
142 static const struct alps_protocol_info alps_v3_protocol_data = {
143         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
144 };
145
146 static const struct alps_protocol_info alps_v3_rushmore_data = {
147         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
148 };
149
150 static const struct alps_protocol_info alps_v5_protocol_data = {
151         ALPS_PROTO_V5, 0xc8, 0xd8, 0
152 };
153
154 static const struct alps_protocol_info alps_v7_protocol_data = {
155         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
156 };
157
158 static const struct alps_protocol_info alps_v8_protocol_data = {
159         ALPS_PROTO_V8, 0x18, 0x18, 0
160 };
161
162 static void alps_set_abs_params_st(struct alps_data *priv,
163                                    struct input_dev *dev1);
164 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
165                                         struct input_dev *dev1);
166 static void alps_set_abs_params_v7(struct alps_data *priv,
167                                    struct input_dev *dev1);
168 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
169                                        struct input_dev *dev1);
170
171 /* Packet formats are described in Documentation/input/alps.txt */
172
173 static bool alps_is_valid_first_byte(struct alps_data *priv,
174                                      unsigned char data)
175 {
176         return (data & priv->mask0) == priv->byte0;
177 }
178
179 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
180                                 int left, int right, int middle)
181 {
182         struct input_dev *dev;
183
184         /*
185          * If shared button has already been reported on the
186          * other device (dev2) then this event should be also
187          * sent through that device.
188          */
189         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
190         input_report_key(dev, BTN_LEFT, left);
191
192         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
193         input_report_key(dev, BTN_RIGHT, right);
194
195         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
196         input_report_key(dev, BTN_MIDDLE, middle);
197
198         /*
199          * Sync the _other_ device now, we'll do the first
200          * device later once we report the rest of the events.
201          */
202         if (dev2)
203                 input_sync(dev2);
204 }
205
206 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
207 {
208         struct alps_data *priv = psmouse->private;
209         unsigned char *packet = psmouse->packet;
210         struct input_dev *dev = psmouse->dev;
211         struct input_dev *dev2 = priv->dev2;
212         int x, y, z, ges, fin, left, right, middle;
213         int back = 0, forward = 0;
214
215         if (priv->proto_version == ALPS_PROTO_V1) {
216                 left = packet[2] & 0x10;
217                 right = packet[2] & 0x08;
218                 middle = 0;
219                 x = packet[1] | ((packet[0] & 0x07) << 7);
220                 y = packet[4] | ((packet[3] & 0x07) << 7);
221                 z = packet[5];
222         } else {
223                 left = packet[3] & 1;
224                 right = packet[3] & 2;
225                 middle = packet[3] & 4;
226                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
227                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
228                 z = packet[5];
229         }
230
231         if (priv->flags & ALPS_FW_BK_1) {
232                 back = packet[0] & 0x10;
233                 forward = packet[2] & 4;
234         }
235
236         if (priv->flags & ALPS_FW_BK_2) {
237                 back = packet[3] & 4;
238                 forward = packet[2] & 4;
239                 if ((middle = forward && back))
240                         forward = back = 0;
241         }
242
243         ges = packet[2] & 1;
244         fin = packet[2] & 2;
245
246         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
247                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
248                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
249
250                 alps_report_buttons(dev2, dev, left, right, middle);
251
252                 input_sync(dev2);
253                 return;
254         }
255
256         /* Dell non interleaved V2 dualpoint has separate stick button bits */
257         if (priv->proto_version == ALPS_PROTO_V2 &&
258             priv->flags == (ALPS_DELL | ALPS_PASS | ALPS_DUALPOINT)) {
259                 left |= packet[0] & 1;
260                 right |= packet[0] & 2;
261                 middle |= packet[0] & 4;
262         }
263
264         alps_report_buttons(dev, dev2, left, right, middle);
265
266         /* Convert hardware tap to a reasonable Z value */
267         if (ges && !fin)
268                 z = 40;
269
270         /*
271          * A "tap and drag" operation is reported by the hardware as a transition
272          * from (!fin && ges) to (fin && ges). This should be translated to the
273          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
274          */
275         if (ges && fin && !priv->prev_fin) {
276                 input_report_abs(dev, ABS_X, x);
277                 input_report_abs(dev, ABS_Y, y);
278                 input_report_abs(dev, ABS_PRESSURE, 0);
279                 input_report_key(dev, BTN_TOOL_FINGER, 0);
280                 input_sync(dev);
281         }
282         priv->prev_fin = fin;
283
284         if (z > 30)
285                 input_report_key(dev, BTN_TOUCH, 1);
286         if (z < 25)
287                 input_report_key(dev, BTN_TOUCH, 0);
288
289         if (z > 0) {
290                 input_report_abs(dev, ABS_X, x);
291                 input_report_abs(dev, ABS_Y, y);
292         }
293
294         input_report_abs(dev, ABS_PRESSURE, z);
295         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
296
297         if (priv->flags & ALPS_WHEEL)
298                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
299
300         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
301                 input_report_key(dev, BTN_FORWARD, forward);
302                 input_report_key(dev, BTN_BACK, back);
303         }
304
305         if (priv->flags & ALPS_FOUR_BUTTONS) {
306                 input_report_key(dev, BTN_0, packet[2] & 4);
307                 input_report_key(dev, BTN_1, packet[0] & 0x10);
308                 input_report_key(dev, BTN_2, packet[3] & 4);
309                 input_report_key(dev, BTN_3, packet[0] & 0x20);
310         }
311
312         input_sync(dev);
313 }
314
315 static void alps_get_bitmap_points(unsigned int map,
316                                    struct alps_bitmap_point *low,
317                                    struct alps_bitmap_point *high,
318                                    int *fingers)
319 {
320         struct alps_bitmap_point *point;
321         int i, bit, prev_bit = 0;
322
323         point = low;
324         for (i = 0; map != 0; i++, map >>= 1) {
325                 bit = map & 1;
326                 if (bit) {
327                         if (!prev_bit) {
328                                 point->start_bit = i;
329                                 point->num_bits = 0;
330                                 (*fingers)++;
331                         }
332                         point->num_bits++;
333                 } else {
334                         if (prev_bit)
335                                 point = high;
336                 }
337                 prev_bit = bit;
338         }
339 }
340
341 /*
342  * Process bitmap data from semi-mt protocols. Returns the number of
343  * fingers detected. A return value of 0 means at least one of the
344  * bitmaps was empty.
345  *
346  * The bitmaps don't have enough data to track fingers, so this function
347  * only generates points representing a bounding box of all contacts.
348  * These points are returned in fields->mt when the return value
349  * is greater than 0.
350  */
351 static int alps_process_bitmap(struct alps_data *priv,
352                                struct alps_fields *fields)
353 {
354         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
355         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
356         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
357         struct input_mt_pos corner[4];
358
359         if (!fields->x_map || !fields->y_map)
360                 return 0;
361
362         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
363         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
364
365         /*
366          * Fingers can overlap, so we use the maximum count of fingers
367          * on either axis as the finger count.
368          */
369         fingers = max(fingers_x, fingers_y);
370
371         /*
372          * If an axis reports only a single contact, we have overlapping or
373          * adjacent fingers. Divide the single contact between the two points.
374          */
375         if (fingers_x == 1) {
376                 i = (x_low.num_bits - 1) / 2;
377                 x_low.num_bits = x_low.num_bits - i;
378                 x_high.start_bit = x_low.start_bit + i;
379                 x_high.num_bits = max(i, 1);
380         }
381         if (fingers_y == 1) {
382                 i = (y_low.num_bits - 1) / 2;
383                 y_low.num_bits = y_low.num_bits - i;
384                 y_high.start_bit = y_low.start_bit + i;
385                 y_high.num_bits = max(i, 1);
386         }
387
388         /* top-left corner */
389         corner[0].x =
390                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
391                 (2 * (priv->x_bits - 1));
392         corner[0].y =
393                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
394                 (2 * (priv->y_bits - 1));
395
396         /* top-right corner */
397         corner[1].x =
398                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
399                 (2 * (priv->x_bits - 1));
400         corner[1].y =
401                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
402                 (2 * (priv->y_bits - 1));
403
404         /* bottom-right corner */
405         corner[2].x =
406                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
407                 (2 * (priv->x_bits - 1));
408         corner[2].y =
409                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
410                 (2 * (priv->y_bits - 1));
411
412         /* bottom-left corner */
413         corner[3].x =
414                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
415                 (2 * (priv->x_bits - 1));
416         corner[3].y =
417                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
418                 (2 * (priv->y_bits - 1));
419
420         /* x-bitmap order is reversed on v5 touchpads  */
421         if (priv->proto_version == ALPS_PROTO_V5) {
422                 for (i = 0; i < 4; i++)
423                         corner[i].x = priv->x_max - corner[i].x;
424         }
425
426         /* y-bitmap order is reversed on v3 and v4 touchpads  */
427         if (priv->proto_version == ALPS_PROTO_V3 ||
428             priv->proto_version == ALPS_PROTO_V4) {
429                 for (i = 0; i < 4; i++)
430                         corner[i].y = priv->y_max - corner[i].y;
431         }
432
433         /*
434          * We only select a corner for the second touch once per 2 finger
435          * touch sequence to avoid the chosen corner (and thus the coordinates)
436          * jumping around when the first touch is in the middle.
437          */
438         if (priv->second_touch == -1) {
439                 /* Find corner closest to our st coordinates */
440                 closest = 0x7fffffff;
441                 for (i = 0; i < 4; i++) {
442                         int dx = fields->st.x - corner[i].x;
443                         int dy = fields->st.y - corner[i].y;
444                         int distance = dx * dx + dy * dy;
445
446                         if (distance < closest) {
447                                 priv->second_touch = i;
448                                 closest = distance;
449                         }
450                 }
451                 /* And select the opposite corner to use for the 2nd touch */
452                 priv->second_touch = (priv->second_touch + 2) % 4;
453         }
454
455         fields->mt[0] = fields->st;
456         fields->mt[1] = corner[priv->second_touch];
457
458         return fingers;
459 }
460
461 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
462 {
463         input_mt_slot(dev, slot);
464         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
465         input_report_abs(dev, ABS_MT_POSITION_X, x);
466         input_report_abs(dev, ABS_MT_POSITION_Y, y);
467 }
468
469 static void alps_report_mt_data(struct psmouse *psmouse, int n)
470 {
471         struct alps_data *priv = psmouse->private;
472         struct input_dev *dev = psmouse->dev;
473         struct alps_fields *f = &priv->f;
474         int i, slot[MAX_TOUCHES];
475
476         input_mt_assign_slots(dev, slot, f->mt, n, 0);
477         for (i = 0; i < n; i++)
478                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
479
480         input_mt_sync_frame(dev);
481 }
482
483 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
484 {
485         struct alps_data *priv = psmouse->private;
486         struct input_dev *dev = psmouse->dev;
487         struct alps_fields *f = &priv->f;
488
489         /* Use st data when we don't have mt data */
490         if (fingers < 2) {
491                 f->mt[0].x = f->st.x;
492                 f->mt[0].y = f->st.y;
493                 fingers = f->pressure > 0 ? 1 : 0;
494                 priv->second_touch = -1;
495         }
496
497         if (fingers >= 1)
498                 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
499         if (fingers >= 2)
500                 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
501         input_mt_sync_frame(dev);
502
503         input_mt_report_finger_count(dev, fingers);
504
505         input_report_key(dev, BTN_LEFT, f->left);
506         input_report_key(dev, BTN_RIGHT, f->right);
507         input_report_key(dev, BTN_MIDDLE, f->middle);
508
509         input_report_abs(dev, ABS_PRESSURE, f->pressure);
510
511         input_sync(dev);
512 }
513
514 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
515 {
516         struct alps_data *priv = psmouse->private;
517         unsigned char *packet = psmouse->packet;
518         struct input_dev *dev = priv->dev2;
519         int x, y, z, left, right, middle;
520
521         /* It should be a DualPoint when received trackstick packet */
522         if (!(priv->flags & ALPS_DUALPOINT)) {
523                 psmouse_warn(psmouse,
524                              "Rejected trackstick packet from non DualPoint device");
525                 return;
526         }
527
528         /* Sanity check packet */
529         if (!(packet[0] & 0x40)) {
530                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
531                 return;
532         }
533
534         /*
535          * There's a special packet that seems to indicate the end
536          * of a stream of trackstick data. Filter these out.
537          */
538         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
539                 return;
540
541         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
542         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
543         z = (packet[4] & 0x7c) >> 2;
544
545         /*
546          * The x and y values tend to be quite large, and when used
547          * alone the trackstick is difficult to use. Scale them down
548          * to compensate.
549          */
550         x /= 8;
551         y /= 8;
552
553         input_report_rel(dev, REL_X, x);
554         input_report_rel(dev, REL_Y, -y);
555
556         /*
557          * Most ALPS models report the trackstick buttons in the touchpad
558          * packets, but a few report them here. No reliable way has been
559          * found to differentiate between the models upfront, so we enable
560          * the quirk in response to seeing a button press in the trackstick
561          * packet.
562          */
563         left = packet[3] & 0x01;
564         right = packet[3] & 0x02;
565         middle = packet[3] & 0x04;
566
567         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
568             (left || right || middle))
569                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
570
571         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
572                 input_report_key(dev, BTN_LEFT, left);
573                 input_report_key(dev, BTN_RIGHT, right);
574                 input_report_key(dev, BTN_MIDDLE, middle);
575         }
576
577         input_sync(dev);
578         return;
579 }
580
581 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
582 {
583         f->left = !!(p[3] & 0x01);
584         f->right = !!(p[3] & 0x02);
585         f->middle = !!(p[3] & 0x04);
586
587         f->ts_left = !!(p[3] & 0x10);
588         f->ts_right = !!(p[3] & 0x20);
589         f->ts_middle = !!(p[3] & 0x40);
590 }
591
592 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
593                                  struct psmouse *psmouse)
594 {
595         f->first_mp = !!(p[4] & 0x40);
596         f->is_mp = !!(p[0] & 0x40);
597
598         if (f->is_mp) {
599                 f->fingers = (p[5] & 0x3) + 1;
600                 f->x_map = ((p[4] & 0x7e) << 8) |
601                            ((p[1] & 0x7f) << 2) |
602                            ((p[0] & 0x30) >> 4);
603                 f->y_map = ((p[3] & 0x70) << 4) |
604                            ((p[2] & 0x7f) << 1) |
605                            (p[4] & 0x01);
606         } else {
607                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
608                        ((p[0] & 0x30) >> 4);
609                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
610                 f->pressure = p[5] & 0x7f;
611
612                 alps_decode_buttons_v3(f, p);
613         }
614
615         return 0;
616 }
617
618 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
619                                  struct psmouse *psmouse)
620 {
621         f->first_mp = !!(p[4] & 0x40);
622         f->is_mp = !!(p[5] & 0x40);
623
624         if (f->is_mp) {
625                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
626                 f->x_map = ((p[5] & 0x10) << 11) |
627                            ((p[4] & 0x7e) << 8) |
628                            ((p[1] & 0x7f) << 2) |
629                            ((p[0] & 0x30) >> 4);
630                 f->y_map = ((p[5] & 0x20) << 6) |
631                            ((p[3] & 0x70) << 4) |
632                            ((p[2] & 0x7f) << 1) |
633                            (p[4] & 0x01);
634         } else {
635                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
636                        ((p[0] & 0x30) >> 4);
637                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
638                 f->pressure = p[5] & 0x7f;
639
640                 alps_decode_buttons_v3(f, p);
641         }
642
643         return 0;
644 }
645
646 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
647                                 struct psmouse *psmouse)
648 {
649         u64 palm_data = 0;
650         struct alps_data *priv = psmouse->private;
651
652         f->first_mp = !!(p[0] & 0x02);
653         f->is_mp = !!(p[0] & 0x20);
654
655         if (!f->is_mp) {
656                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
657                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
658                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
659                 alps_decode_buttons_v3(f, p);
660         } else {
661                 f->fingers = ((p[0] & 0x6) >> 1 |
662                      (p[0] & 0x10) >> 2);
663
664                 palm_data = (p[1] & 0x7f) |
665                             ((p[2] & 0x7f) << 7) |
666                             ((p[4] & 0x7f) << 14) |
667                             ((p[5] & 0x7f) << 21) |
668                             ((p[3] & 0x07) << 28) |
669                             (((u64)p[3] & 0x70) << 27) |
670                             (((u64)p[0] & 0x01) << 34);
671
672                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
673                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
674
675                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
676                 f->x_map = (palm_data >> priv->y_bits) &
677                            (BIT(priv->x_bits) - 1);
678         }
679
680         return 0;
681 }
682
683 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
684 {
685         struct alps_data *priv = psmouse->private;
686         unsigned char *packet = psmouse->packet;
687         struct input_dev *dev2 = priv->dev2;
688         struct alps_fields *f = &priv->f;
689         int fingers = 0;
690
691         memset(f, 0, sizeof(*f));
692
693         priv->decode_fields(f, packet, psmouse);
694
695         /*
696          * There's no single feature of touchpad position and bitmap packets
697          * that can be used to distinguish between them. We rely on the fact
698          * that a bitmap packet should always follow a position packet with
699          * bit 6 of packet[4] set.
700          */
701         if (priv->multi_packet) {
702                 /*
703                  * Sometimes a position packet will indicate a multi-packet
704                  * sequence, but then what follows is another position
705                  * packet. Check for this, and when it happens process the
706                  * position packet as usual.
707                  */
708                 if (f->is_mp) {
709                         fingers = f->fingers;
710                         /*
711                          * Bitmap processing uses position packet's coordinate
712                          * data, so we need to do decode it first.
713                          */
714                         priv->decode_fields(f, priv->multi_data, psmouse);
715                         if (alps_process_bitmap(priv, f) == 0)
716                                 fingers = 0; /* Use st data */
717                 } else {
718                         priv->multi_packet = 0;
719                 }
720         }
721
722         /*
723          * Bit 6 of byte 0 is not usually set in position packets. The only
724          * times it seems to be set is in situations where the data is
725          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
726          * this combined with the fact that this bit is useful for filtering
727          * out misidentified bitmap packets, we reject anything with this
728          * bit set.
729          */
730         if (f->is_mp)
731                 return;
732
733         if (!priv->multi_packet && f->first_mp) {
734                 priv->multi_packet = 1;
735                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
736                 return;
737         }
738
739         priv->multi_packet = 0;
740
741         /*
742          * Sometimes the hardware sends a single packet with z = 0
743          * in the middle of a stream. Real releases generate packets
744          * with x, y, and z all zero, so these seem to be flukes.
745          * Ignore them.
746          */
747         if (f->st.x && f->st.y && !f->pressure)
748                 return;
749
750         alps_report_semi_mt_data(psmouse, fingers);
751
752         if ((priv->flags & ALPS_DUALPOINT) &&
753             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
754                 input_report_key(dev2, BTN_LEFT, f->ts_left);
755                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
756                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
757                 input_sync(dev2);
758         }
759 }
760
761 static void alps_process_packet_v3(struct psmouse *psmouse)
762 {
763         unsigned char *packet = psmouse->packet;
764
765         /*
766          * v3 protocol packets come in three types, two representing
767          * touchpad data and one representing trackstick data.
768          * Trackstick packets seem to be distinguished by always
769          * having 0x3f in the last byte. This value has never been
770          * observed in the last byte of either of the other types
771          * of packets.
772          */
773         if (packet[5] == 0x3f) {
774                 alps_process_trackstick_packet_v3(psmouse);
775                 return;
776         }
777
778         alps_process_touchpad_packet_v3_v5(psmouse);
779 }
780
781 static void alps_process_packet_v6(struct psmouse *psmouse)
782 {
783         struct alps_data *priv = psmouse->private;
784         unsigned char *packet = psmouse->packet;
785         struct input_dev *dev = psmouse->dev;
786         struct input_dev *dev2 = priv->dev2;
787         int x, y, z, left, right, middle;
788
789         /*
790          * We can use Byte5 to distinguish if the packet is from Touchpad
791          * or Trackpoint.
792          * Touchpad:    0 - 0x7E
793          * Trackpoint:  0x7F
794          */
795         if (packet[5] == 0x7F) {
796                 /* It should be a DualPoint when received Trackpoint packet */
797                 if (!(priv->flags & ALPS_DUALPOINT)) {
798                         psmouse_warn(psmouse,
799                                      "Rejected trackstick packet from non DualPoint device");
800                         return;
801                 }
802
803                 /* Trackpoint packet */
804                 x = packet[1] | ((packet[3] & 0x20) << 2);
805                 y = packet[2] | ((packet[3] & 0x40) << 1);
806                 z = packet[4];
807                 left = packet[3] & 0x01;
808                 right = packet[3] & 0x02;
809                 middle = packet[3] & 0x04;
810
811                 /* To prevent the cursor jump when finger lifted */
812                 if (x == 0x7F && y == 0x7F && z == 0x7F)
813                         x = y = z = 0;
814
815                 /* Divide 4 since trackpoint's speed is too fast */
816                 input_report_rel(dev2, REL_X, (char)x / 4);
817                 input_report_rel(dev2, REL_Y, -((char)y / 4));
818
819                 input_report_key(dev2, BTN_LEFT, left);
820                 input_report_key(dev2, BTN_RIGHT, right);
821                 input_report_key(dev2, BTN_MIDDLE, middle);
822
823                 input_sync(dev2);
824                 return;
825         }
826
827         /* Touchpad packet */
828         x = packet[1] | ((packet[3] & 0x78) << 4);
829         y = packet[2] | ((packet[4] & 0x78) << 4);
830         z = packet[5];
831         left = packet[3] & 0x01;
832         right = packet[3] & 0x02;
833
834         if (z > 30)
835                 input_report_key(dev, BTN_TOUCH, 1);
836         if (z < 25)
837                 input_report_key(dev, BTN_TOUCH, 0);
838
839         if (z > 0) {
840                 input_report_abs(dev, ABS_X, x);
841                 input_report_abs(dev, ABS_Y, y);
842         }
843
844         input_report_abs(dev, ABS_PRESSURE, z);
845         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
846
847         /* v6 touchpad does not have middle button */
848         input_report_key(dev, BTN_LEFT, left);
849         input_report_key(dev, BTN_RIGHT, right);
850
851         input_sync(dev);
852 }
853
854 static void alps_process_packet_v4(struct psmouse *psmouse)
855 {
856         struct alps_data *priv = psmouse->private;
857         unsigned char *packet = psmouse->packet;
858         struct alps_fields *f = &priv->f;
859         int offset;
860
861         /*
862          * v4 has a 6-byte encoding for bitmap data, but this data is
863          * broken up between 3 normal packets. Use priv->multi_packet to
864          * track our position in the bitmap packet.
865          */
866         if (packet[6] & 0x40) {
867                 /* sync, reset position */
868                 priv->multi_packet = 0;
869         }
870
871         if (WARN_ON_ONCE(priv->multi_packet > 2))
872                 return;
873
874         offset = 2 * priv->multi_packet;
875         priv->multi_data[offset] = packet[6];
876         priv->multi_data[offset + 1] = packet[7];
877
878         f->left = !!(packet[4] & 0x01);
879         f->right = !!(packet[4] & 0x02);
880
881         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
882                   ((packet[0] & 0x30) >> 4);
883         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
884         f->pressure = packet[5] & 0x7f;
885
886         if (++priv->multi_packet > 2) {
887                 priv->multi_packet = 0;
888
889                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
890                            ((priv->multi_data[3] & 0x60) << 3) |
891                            ((priv->multi_data[0] & 0x3f) << 2) |
892                            ((priv->multi_data[1] & 0x60) >> 5);
893                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
894                            ((priv->multi_data[3] & 0x1f) << 5) |
895                             (priv->multi_data[1] & 0x1f);
896
897                 f->fingers = alps_process_bitmap(priv, f);
898         }
899
900         alps_report_semi_mt_data(psmouse, f->fingers);
901 }
902
903 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
904 {
905         switch (psmouse->pktcnt) {
906         case 3:
907                 return (psmouse->packet[2] & 0x40) == 0x40;
908         case 4:
909                 return (psmouse->packet[3] & 0x48) == 0x48;
910         case 6:
911                 return (psmouse->packet[5] & 0x40) == 0x00;
912         }
913         return true;
914 }
915
916 static unsigned char alps_get_packet_id_v7(char *byte)
917 {
918         unsigned char packet_id;
919
920         if (byte[4] & 0x40)
921                 packet_id = V7_PACKET_ID_TWO;
922         else if (byte[4] & 0x01)
923                 packet_id = V7_PACKET_ID_MULTI;
924         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
925                 packet_id = V7_PACKET_ID_NEW;
926         else if (byte[1] == 0x00 && byte[4] == 0x00)
927                 packet_id = V7_PACKET_ID_IDLE;
928         else
929                 packet_id = V7_PACKET_ID_UNKNOWN;
930
931         return packet_id;
932 }
933
934 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
935                                           unsigned char *pkt,
936                                           unsigned char pkt_id)
937 {
938         mt[0].x = ((pkt[2] & 0x80) << 4);
939         mt[0].x |= ((pkt[2] & 0x3F) << 5);
940         mt[0].x |= ((pkt[3] & 0x30) >> 1);
941         mt[0].x |= (pkt[3] & 0x07);
942         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
943
944         mt[1].x = ((pkt[3] & 0x80) << 4);
945         mt[1].x |= ((pkt[4] & 0x80) << 3);
946         mt[1].x |= ((pkt[4] & 0x3F) << 4);
947         mt[1].y = ((pkt[5] & 0x80) << 3);
948         mt[1].y |= ((pkt[5] & 0x3F) << 4);
949
950         switch (pkt_id) {
951         case V7_PACKET_ID_TWO:
952                 mt[1].x &= ~0x000F;
953                 mt[1].y |= 0x000F;
954                 /* Detect false-postive touches where x & y report max value */
955                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
956                         mt[1].x = 0;
957                         /* y gets set to 0 at the end of this function */
958                 }
959                 break;
960
961         case V7_PACKET_ID_MULTI:
962                 mt[1].x &= ~0x003F;
963                 mt[1].y &= ~0x0020;
964                 mt[1].y |= ((pkt[4] & 0x02) << 4);
965                 mt[1].y |= 0x001F;
966                 break;
967
968         case V7_PACKET_ID_NEW:
969                 mt[1].x &= ~0x003F;
970                 mt[1].x |= (pkt[0] & 0x20);
971                 mt[1].y |= 0x000F;
972                 break;
973         }
974
975         mt[0].y = 0x7FF - mt[0].y;
976         mt[1].y = 0x7FF - mt[1].y;
977 }
978
979 static int alps_get_mt_count(struct input_mt_pos *mt)
980 {
981         int i, fingers = 0;
982
983         for (i = 0; i < MAX_TOUCHES; i++) {
984                 if (mt[i].x != 0 || mt[i].y != 0)
985                         fingers++;
986         }
987
988         return fingers;
989 }
990
991 static int alps_decode_packet_v7(struct alps_fields *f,
992                                   unsigned char *p,
993                                   struct psmouse *psmouse)
994 {
995         struct alps_data *priv = psmouse->private;
996         unsigned char pkt_id;
997
998         pkt_id = alps_get_packet_id_v7(p);
999         if (pkt_id == V7_PACKET_ID_IDLE)
1000                 return 0;
1001         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1002                 return -1;
1003         /*
1004          * NEW packets are send to indicate a discontinuity in the finger
1005          * coordinate reporting. Specifically a finger may have moved from
1006          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1007          * us.
1008          *
1009          * NEW packets have 3 problems:
1010          * 1) They do not contain middle / right button info (on non clickpads)
1011          *    this can be worked around by preserving the old button state
1012          * 2) They do not contain an accurate fingercount, and they are
1013          *    typically send when the number of fingers changes. We cannot use
1014          *    the old finger count as that may mismatch with the amount of
1015          *    touch coordinates we've available in the NEW packet
1016          * 3) Their x data for the second touch is inaccurate leading to
1017          *    a possible jump of the x coordinate by 16 units when the first
1018          *    non NEW packet comes in
1019          * Since problems 2 & 3 cannot be worked around, just ignore them.
1020          */
1021         if (pkt_id == V7_PACKET_ID_NEW)
1022                 return 1;
1023
1024         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1025
1026         if (pkt_id == V7_PACKET_ID_TWO)
1027                 f->fingers = alps_get_mt_count(f->mt);
1028         else /* pkt_id == V7_PACKET_ID_MULTI */
1029                 f->fingers = 3 + (p[5] & 0x03);
1030
1031         f->left = (p[0] & 0x80) >> 7;
1032         if (priv->flags & ALPS_BUTTONPAD) {
1033                 if (p[0] & 0x20)
1034                         f->fingers++;
1035                 if (p[0] & 0x10)
1036                         f->fingers++;
1037         } else {
1038                 f->right = (p[0] & 0x20) >> 5;
1039                 f->middle = (p[0] & 0x10) >> 4;
1040         }
1041
1042         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1043         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1044                 f->mt[0].x = f->mt[1].x;
1045                 f->mt[0].y = f->mt[1].y;
1046                 f->mt[1].x = 0;
1047                 f->mt[1].y = 0;
1048         }
1049
1050         return 0;
1051 }
1052
1053 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1054 {
1055         struct alps_data *priv = psmouse->private;
1056         unsigned char *packet = psmouse->packet;
1057         struct input_dev *dev2 = priv->dev2;
1058         int x, y, z, left, right, middle;
1059
1060         /* It should be a DualPoint when received trackstick packet */
1061         if (!(priv->flags & ALPS_DUALPOINT)) {
1062                 psmouse_warn(psmouse,
1063                              "Rejected trackstick packet from non DualPoint device");
1064                 return;
1065         }
1066
1067         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1068         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1069             ((packet[3] & 0x20) << 1);
1070         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1071
1072         left = (packet[1] & 0x01);
1073         right = (packet[1] & 0x02) >> 1;
1074         middle = (packet[1] & 0x04) >> 2;
1075
1076         input_report_rel(dev2, REL_X, (char)x);
1077         input_report_rel(dev2, REL_Y, -((char)y));
1078
1079         input_report_key(dev2, BTN_LEFT, left);
1080         input_report_key(dev2, BTN_RIGHT, right);
1081         input_report_key(dev2, BTN_MIDDLE, middle);
1082
1083         input_sync(dev2);
1084 }
1085
1086 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1087 {
1088         struct alps_data *priv = psmouse->private;
1089         struct input_dev *dev = psmouse->dev;
1090         struct alps_fields *f = &priv->f;
1091
1092         memset(f, 0, sizeof(*f));
1093
1094         if (priv->decode_fields(f, psmouse->packet, psmouse))
1095                 return;
1096
1097         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1098
1099         input_mt_report_finger_count(dev, f->fingers);
1100
1101         input_report_key(dev, BTN_LEFT, f->left);
1102         input_report_key(dev, BTN_RIGHT, f->right);
1103         input_report_key(dev, BTN_MIDDLE, f->middle);
1104
1105         input_sync(dev);
1106 }
1107
1108 static void alps_process_packet_v7(struct psmouse *psmouse)
1109 {
1110         unsigned char *packet = psmouse->packet;
1111
1112         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1113                 alps_process_trackstick_packet_v7(psmouse);
1114         else
1115                 alps_process_touchpad_packet_v7(psmouse);
1116 }
1117
1118 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1119 {
1120         unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1121
1122         if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1123             (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1124                 pkt_id = SS4_PACKET_ID_IDLE;
1125         } else if (!(byte[3] & 0x10)) {
1126                 pkt_id = SS4_PACKET_ID_ONE;
1127         } else if (!(byte[3] & 0x20)) {
1128                 pkt_id = SS4_PACKET_ID_TWO;
1129         } else {
1130                 pkt_id = SS4_PACKET_ID_MULTI;
1131         }
1132
1133         return pkt_id;
1134 }
1135
1136 static int alps_decode_ss4_v2(struct alps_fields *f,
1137                               unsigned char *p, struct psmouse *psmouse)
1138 {
1139         struct alps_data *priv = psmouse->private;
1140         unsigned char pkt_id;
1141         unsigned int no_data_x, no_data_y;
1142
1143         pkt_id = alps_get_pkt_id_ss4_v2(p);
1144
1145         /* Current packet is 1Finger coordinate packet */
1146         switch (pkt_id) {
1147         case SS4_PACKET_ID_ONE:
1148                 f->mt[0].x = SS4_1F_X_V2(p);
1149                 f->mt[0].y = SS4_1F_Y_V2(p);
1150                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1151                 f->fingers = 1;
1152                 f->first_mp = 0;
1153                 f->is_mp = 0;
1154                 break;
1155
1156         case SS4_PACKET_ID_TWO:
1157                 if (priv->flags & ALPS_BUTTONPAD) {
1158                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1159                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1160                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1161                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1162                 } else {
1163                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1164                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1165                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1166                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1167                 }
1168                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1169
1170                 if (SS4_IS_MF_CONTINUE(p)) {
1171                         f->first_mp = 1;
1172                 } else {
1173                         f->fingers = 2;
1174                         f->first_mp = 0;
1175                 }
1176                 f->is_mp = 0;
1177
1178                 break;
1179
1180         case SS4_PACKET_ID_MULTI:
1181                 if (priv->flags & ALPS_BUTTONPAD) {
1182                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1183                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1184                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1185                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1186                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1187                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1188                 } else {
1189                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1190                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1191                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1192                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1193                         no_data_x = SS4_MFPACKET_NO_AX;
1194                         no_data_y = SS4_MFPACKET_NO_AY;
1195                 }
1196
1197                 f->first_mp = 0;
1198                 f->is_mp = 1;
1199
1200                 if (SS4_IS_5F_DETECTED(p)) {
1201                         f->fingers = 5;
1202                 } else if (f->mt[3].x == no_data_x &&
1203                              f->mt[3].y == no_data_y) {
1204                         f->mt[3].x = 0;
1205                         f->mt[3].y = 0;
1206                         f->fingers = 3;
1207                 } else {
1208                         f->fingers = 4;
1209                 }
1210                 break;
1211
1212         case SS4_PACKET_ID_IDLE:
1213         default:
1214                 memset(f, 0, sizeof(struct alps_fields));
1215                 break;
1216         }
1217
1218         f->left = !!(SS4_BTN_V2(p) & 0x01);
1219         if (!(priv->flags & ALPS_BUTTONPAD)) {
1220                 f->right = !!(SS4_BTN_V2(p) & 0x02);
1221                 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1222         }
1223
1224         return 0;
1225 }
1226
1227 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1228 {
1229         struct alps_data *priv = psmouse->private;
1230         unsigned char *packet = psmouse->packet;
1231         struct input_dev *dev = psmouse->dev;
1232         struct alps_fields *f = &priv->f;
1233
1234         memset(f, 0, sizeof(struct alps_fields));
1235         priv->decode_fields(f, packet, psmouse);
1236         if (priv->multi_packet) {
1237                 /*
1238                  * Sometimes the first packet will indicate a multi-packet
1239                  * sequence, but sometimes the next multi-packet would not
1240                  * come. Check for this, and when it happens process the
1241                  * position packet as usual.
1242                  */
1243                 if (f->is_mp) {
1244                         /* Now process the 1st packet */
1245                         priv->decode_fields(f, priv->multi_data, psmouse);
1246                 } else {
1247                         priv->multi_packet = 0;
1248                 }
1249         }
1250
1251         /*
1252          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1253          * When it is set, it means 2nd packet comes without 1st packet come.
1254          */
1255         if (f->is_mp)
1256                 return;
1257
1258         /* Save the first packet */
1259         if (!priv->multi_packet && f->first_mp) {
1260                 priv->multi_packet = 1;
1261                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1262                 return;
1263         }
1264
1265         priv->multi_packet = 0;
1266
1267         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1268
1269         input_mt_report_finger_count(dev, f->fingers);
1270
1271         input_report_key(dev, BTN_LEFT, f->left);
1272         input_report_key(dev, BTN_RIGHT, f->right);
1273         input_report_key(dev, BTN_MIDDLE, f->middle);
1274
1275         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1276         input_sync(dev);
1277 }
1278
1279 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1280 {
1281         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1282                 return false;
1283         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1284                 return false;
1285         return true;
1286 }
1287
1288 static DEFINE_MUTEX(alps_mutex);
1289
1290 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1291 {
1292         struct alps_data *priv =
1293                 container_of(work, struct alps_data, dev3_register_work.work);
1294         struct psmouse *psmouse = priv->psmouse;
1295         struct input_dev *dev3;
1296         int error = 0;
1297
1298         mutex_lock(&alps_mutex);
1299
1300         if (priv->dev3)
1301                 goto out;
1302
1303         dev3 = input_allocate_device();
1304         if (!dev3) {
1305                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1306                 error = -ENOMEM;
1307                 goto out;
1308         }
1309
1310         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1311                  psmouse->ps2dev.serio->phys,
1312                  (priv->dev2 ? "input2" : "input1"));
1313         dev3->phys = priv->phys3;
1314
1315         /*
1316          * format of input device name is: "protocol vendor name"
1317          * see function psmouse_switch_protocol() in psmouse-base.c
1318          */
1319         dev3->name = "PS/2 ALPS Mouse";
1320
1321         dev3->id.bustype = BUS_I8042;
1322         dev3->id.vendor  = 0x0002;
1323         dev3->id.product = PSMOUSE_PS2;
1324         dev3->id.version = 0x0000;
1325         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1326
1327         input_set_capability(dev3, EV_REL, REL_X);
1328         input_set_capability(dev3, EV_REL, REL_Y);
1329         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1330         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1331         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1332
1333         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1334
1335         error = input_register_device(dev3);
1336         if (error) {
1337                 psmouse_err(psmouse,
1338                             "failed to register secondary device: %d\n",
1339                             error);
1340                 input_free_device(dev3);
1341                 goto out;
1342         }
1343
1344         priv->dev3 = dev3;
1345
1346 out:
1347         /*
1348          * Save the error code so that we can detect that we
1349          * already tried to create the device.
1350          */
1351         if (error)
1352                 priv->dev3 = ERR_PTR(error);
1353
1354         mutex_unlock(&alps_mutex);
1355 }
1356
1357 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1358                                         unsigned char packet[],
1359                                         bool report_buttons)
1360 {
1361         struct alps_data *priv = psmouse->private;
1362         struct input_dev *dev, *dev2 = NULL;
1363
1364         /* Figure out which device to use to report the bare packet */
1365         if (priv->proto_version == ALPS_PROTO_V2 &&
1366             (priv->flags & ALPS_DUALPOINT)) {
1367                 /* On V2 devices the DualPoint Stick reports bare packets */
1368                 dev = priv->dev2;
1369                 dev2 = psmouse->dev;
1370         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1371                 /* Register dev3 mouse if we received PS/2 packet first time */
1372                 if (!IS_ERR(priv->dev3))
1373                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1374                                            0);
1375                 return;
1376         } else {
1377                 dev = priv->dev3;
1378         }
1379
1380         if (report_buttons)
1381                 alps_report_buttons(dev, dev2,
1382                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1383
1384         input_report_rel(dev, REL_X,
1385                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1386         input_report_rel(dev, REL_Y,
1387                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1388
1389         input_sync(dev);
1390 }
1391
1392 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1393 {
1394         struct alps_data *priv = psmouse->private;
1395
1396         if (psmouse->pktcnt < 6)
1397                 return PSMOUSE_GOOD_DATA;
1398
1399         if (psmouse->pktcnt == 6) {
1400                 /*
1401                  * Start a timer to flush the packet if it ends up last
1402                  * 6-byte packet in the stream. Timer needs to fire
1403                  * psmouse core times out itself. 20 ms should be enough
1404                  * to decide if we are getting more data or not.
1405                  */
1406                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1407                 return PSMOUSE_GOOD_DATA;
1408         }
1409
1410         del_timer(&priv->timer);
1411
1412         if (psmouse->packet[6] & 0x80) {
1413
1414                 /*
1415                  * Highest bit is set - that means we either had
1416                  * complete ALPS packet and this is start of the
1417                  * next packet or we got garbage.
1418                  */
1419
1420                 if (((psmouse->packet[3] |
1421                       psmouse->packet[4] |
1422                       psmouse->packet[5]) & 0x80) ||
1423                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1424                         psmouse_dbg(psmouse,
1425                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1426                                     psmouse->packet + 3);
1427                         return PSMOUSE_BAD_DATA;
1428                 }
1429
1430                 priv->process_packet(psmouse);
1431
1432                 /* Continue with the next packet */
1433                 psmouse->packet[0] = psmouse->packet[6];
1434                 psmouse->pktcnt = 1;
1435
1436         } else {
1437
1438                 /*
1439                  * High bit is 0 - that means that we indeed got a PS/2
1440                  * packet in the middle of ALPS packet.
1441                  *
1442                  * There is also possibility that we got 6-byte ALPS
1443                  * packet followed  by 3-byte packet from trackpoint. We
1444                  * can not distinguish between these 2 scenarios but
1445                  * because the latter is unlikely to happen in course of
1446                  * normal operation (user would need to press all
1447                  * buttons on the pad and start moving trackpoint
1448                  * without touching the pad surface) we assume former.
1449                  * Even if we are wrong the wost thing that would happen
1450                  * the cursor would jump but we should not get protocol
1451                  * de-synchronization.
1452                  */
1453
1454                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1455                                             false);
1456
1457                 /*
1458                  * Continue with the standard ALPS protocol handling,
1459                  * but make sure we won't process it as an interleaved
1460                  * packet again, which may happen if all buttons are
1461                  * pressed. To avoid this let's reset the 4th bit which
1462                  * is normally 1.
1463                  */
1464                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1465                 psmouse->pktcnt = 4;
1466         }
1467
1468         return PSMOUSE_GOOD_DATA;
1469 }
1470
1471 static void alps_flush_packet(unsigned long data)
1472 {
1473         struct psmouse *psmouse = (struct psmouse *)data;
1474         struct alps_data *priv = psmouse->private;
1475
1476         serio_pause_rx(psmouse->ps2dev.serio);
1477
1478         if (psmouse->pktcnt == psmouse->pktsize) {
1479
1480                 /*
1481                  * We did not any more data in reasonable amount of time.
1482                  * Validate the last 3 bytes and process as a standard
1483                  * ALPS packet.
1484                  */
1485                 if ((psmouse->packet[3] |
1486                      psmouse->packet[4] |
1487                      psmouse->packet[5]) & 0x80) {
1488                         psmouse_dbg(psmouse,
1489                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1490                                     psmouse->packet + 3);
1491                 } else {
1492                         priv->process_packet(psmouse);
1493                 }
1494                 psmouse->pktcnt = 0;
1495         }
1496
1497         serio_continue_rx(psmouse->ps2dev.serio);
1498 }
1499
1500 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1501 {
1502         struct alps_data *priv = psmouse->private;
1503
1504         /*
1505          * Check if we are dealing with a bare PS/2 packet, presumably from
1506          * a device connected to the external PS/2 port. Because bare PS/2
1507          * protocol does not have enough constant bits to self-synchronize
1508          * properly we only do this if the device is fully synchronized.
1509          * Can not distinguish V8's first byte from PS/2 packet's
1510          */
1511         if (priv->proto_version != ALPS_PROTO_V8 &&
1512             !psmouse->out_of_sync_cnt &&
1513             (psmouse->packet[0] & 0xc8) == 0x08) {
1514
1515                 if (psmouse->pktcnt == 3) {
1516                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1517                                                     true);
1518                         return PSMOUSE_FULL_PACKET;
1519                 }
1520                 return PSMOUSE_GOOD_DATA;
1521         }
1522
1523         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1524
1525         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1526             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1527                 return alps_handle_interleaved_ps2(psmouse);
1528         }
1529
1530         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1531                 psmouse_dbg(psmouse,
1532                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1533                             psmouse->packet[0], priv->mask0, priv->byte0);
1534                 return PSMOUSE_BAD_DATA;
1535         }
1536
1537         /* Bytes 2 - pktsize should have 0 in the highest bit */
1538         if (priv->proto_version < ALPS_PROTO_V5 &&
1539             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1540             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1541                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1542                             psmouse->pktcnt - 1,
1543                             psmouse->packet[psmouse->pktcnt - 1]);
1544
1545                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1546                     psmouse->pktcnt == psmouse->pktsize) {
1547                         /*
1548                          * Some Dell boxes, such as Latitude E6440 or E7440
1549                          * with closed lid, quite often smash last byte of
1550                          * otherwise valid packet with 0xff. Given that the
1551                          * next packet is very likely to be valid let's
1552                          * report PSMOUSE_FULL_PACKET but not process data,
1553                          * rather than reporting PSMOUSE_BAD_DATA and
1554                          * filling the logs.
1555                          */
1556                         return PSMOUSE_FULL_PACKET;
1557                 }
1558
1559                 return PSMOUSE_BAD_DATA;
1560         }
1561
1562         if ((priv->proto_version == ALPS_PROTO_V7 &&
1563                         !alps_is_valid_package_v7(psmouse)) ||
1564             (priv->proto_version == ALPS_PROTO_V8 &&
1565                         !alps_is_valid_package_ss4_v2(psmouse))) {
1566                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1567                             psmouse->pktcnt - 1,
1568                             psmouse->packet[psmouse->pktcnt - 1]);
1569                 return PSMOUSE_BAD_DATA;
1570         }
1571
1572         if (psmouse->pktcnt == psmouse->pktsize) {
1573                 priv->process_packet(psmouse);
1574                 return PSMOUSE_FULL_PACKET;
1575         }
1576
1577         return PSMOUSE_GOOD_DATA;
1578 }
1579
1580 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1581 {
1582         struct ps2dev *ps2dev = &psmouse->ps2dev;
1583         struct alps_data *priv = psmouse->private;
1584         int command;
1585         unsigned char *param;
1586         unsigned char dummy[4];
1587
1588         BUG_ON(nibble > 0xf);
1589
1590         command = priv->nibble_commands[nibble].command;
1591         param = (command & 0x0f00) ?
1592                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1593
1594         if (ps2_command(ps2dev, param, command))
1595                 return -1;
1596
1597         return 0;
1598 }
1599
1600 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1601 {
1602         struct ps2dev *ps2dev = &psmouse->ps2dev;
1603         struct alps_data *priv = psmouse->private;
1604         int i, nibble;
1605
1606         if (ps2_command(ps2dev, NULL, priv->addr_command))
1607                 return -1;
1608
1609         for (i = 12; i >= 0; i -= 4) {
1610                 nibble = (addr >> i) & 0xf;
1611                 if (alps_command_mode_send_nibble(psmouse, nibble))
1612                         return -1;
1613         }
1614
1615         return 0;
1616 }
1617
1618 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1619 {
1620         struct ps2dev *ps2dev = &psmouse->ps2dev;
1621         unsigned char param[4];
1622
1623         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1624                 return -1;
1625
1626         /*
1627          * The address being read is returned in the first two bytes
1628          * of the result. Check that this address matches the expected
1629          * address.
1630          */
1631         if (addr != ((param[0] << 8) | param[1]))
1632                 return -1;
1633
1634         return param[2];
1635 }
1636
1637 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1638 {
1639         if (alps_command_mode_set_addr(psmouse, addr))
1640                 return -1;
1641         return __alps_command_mode_read_reg(psmouse, addr);
1642 }
1643
1644 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1645 {
1646         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1647                 return -1;
1648         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1649                 return -1;
1650         return 0;
1651 }
1652
1653 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1654                                        u8 value)
1655 {
1656         if (alps_command_mode_set_addr(psmouse, addr))
1657                 return -1;
1658         return __alps_command_mode_write_reg(psmouse, value);
1659 }
1660
1661 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1662                         int repeated_command, unsigned char *param)
1663 {
1664         struct ps2dev *ps2dev = &psmouse->ps2dev;
1665
1666         param[0] = 0;
1667         if (init_command && ps2_command(ps2dev, param, init_command))
1668                 return -EIO;
1669
1670         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1671             ps2_command(ps2dev,  NULL, repeated_command) ||
1672             ps2_command(ps2dev,  NULL, repeated_command))
1673                 return -EIO;
1674
1675         param[0] = param[1] = param[2] = 0xff;
1676         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1677                 return -EIO;
1678
1679         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1680                     repeated_command, param);
1681         return 0;
1682 }
1683
1684 static bool alps_check_valid_firmware_id(unsigned char id[])
1685 {
1686         if (id[0] == 0x73)
1687                 return true;
1688
1689         if (id[0] == 0x88 &&
1690             (id[1] == 0x07 ||
1691              id[1] == 0x08 ||
1692              (id[1] & 0xf0) == 0xb0 ||
1693              (id[1] & 0xf0) == 0xc0)) {
1694                 return true;
1695         }
1696
1697         return false;
1698 }
1699
1700 static int alps_enter_command_mode(struct psmouse *psmouse)
1701 {
1702         unsigned char param[4];
1703
1704         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1705                 psmouse_err(psmouse, "failed to enter command mode\n");
1706                 return -1;
1707         }
1708
1709         if (!alps_check_valid_firmware_id(param)) {
1710                 psmouse_dbg(psmouse,
1711                             "unknown response while entering command mode\n");
1712                 return -1;
1713         }
1714         return 0;
1715 }
1716
1717 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1718 {
1719         struct ps2dev *ps2dev = &psmouse->ps2dev;
1720         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1721                 return -1;
1722         return 0;
1723 }
1724
1725 /*
1726  * For DualPoint devices select the device that should respond to
1727  * subsequent commands. It looks like glidepad is behind stickpointer,
1728  * I'd thought it would be other way around...
1729  */
1730 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1731 {
1732         struct ps2dev *ps2dev = &psmouse->ps2dev;
1733         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1734
1735         if (ps2_command(ps2dev, NULL, cmd) ||
1736             ps2_command(ps2dev, NULL, cmd) ||
1737             ps2_command(ps2dev, NULL, cmd) ||
1738             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1739                 return -1;
1740
1741         /* we may get 3 more bytes, just ignore them */
1742         ps2_drain(ps2dev, 3, 100);
1743
1744         return 0;
1745 }
1746
1747 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1748 {
1749         struct ps2dev *ps2dev = &psmouse->ps2dev;
1750
1751         /* Try ALPS magic knock - 4 disable before enable */
1752         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1753             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1754             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1755             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1756             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1757                 return -1;
1758
1759         /*
1760          * Switch mouse to poll (remote) mode so motion data will not
1761          * get in our way
1762          */
1763         return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1764 }
1765
1766 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1767 {
1768         int i, nibble;
1769
1770         /*
1771          * b0-b11 are valid bits, send sequence is inverse.
1772          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1773          */
1774         for (i = 0; i <= 8; i += 4) {
1775                 nibble = (word >> i) & 0xf;
1776                 if (alps_command_mode_send_nibble(psmouse, nibble))
1777                         return -1;
1778         }
1779
1780         return 0;
1781 }
1782
1783 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1784                                        u16 addr, u16 value)
1785 {
1786         struct ps2dev *ps2dev = &psmouse->ps2dev;
1787
1788         /* 0x0A0 is the command to write the word */
1789         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1790             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1791             alps_monitor_mode_send_word(psmouse, addr) ||
1792             alps_monitor_mode_send_word(psmouse, value) ||
1793             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1794                 return -1;
1795
1796         return 0;
1797 }
1798
1799 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1800 {
1801         struct ps2dev *ps2dev = &psmouse->ps2dev;
1802
1803         if (enable) {
1804                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1805                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1806                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1807                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1808                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1809                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1810                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1811                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1812                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1813                         return -1;
1814         } else {
1815                 /* EC to exit monitor mode */
1816                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1817                         return -1;
1818         }
1819
1820         return 0;
1821 }
1822
1823 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1824 {
1825         u16 reg_val = 0x181;
1826         int ret = -1;
1827
1828         /* enter monitor mode, to write the register */
1829         if (alps_monitor_mode(psmouse, true))
1830                 return -1;
1831
1832         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1833
1834         if (alps_monitor_mode(psmouse, false))
1835                 ret = -1;
1836
1837         return ret;
1838 }
1839
1840 static int alps_get_status(struct psmouse *psmouse, char *param)
1841 {
1842         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1843         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1844                 return -1;
1845
1846         return 0;
1847 }
1848
1849 /*
1850  * Turn touchpad tapping on or off. The sequences are:
1851  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1852  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1853  * My guess that 0xE9 (GetInfo) is here as a sync point.
1854  * For models that also have stickpointer (DualPoints) its tapping
1855  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1856  * we don't fiddle with it.
1857  */
1858 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1859 {
1860         struct ps2dev *ps2dev = &psmouse->ps2dev;
1861         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1862         unsigned char tap_arg = enable ? 0x0A : 0x00;
1863         unsigned char param[4];
1864
1865         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1866             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1867             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1868             ps2_command(ps2dev, &tap_arg, cmd))
1869                 return -1;
1870
1871         if (alps_get_status(psmouse, param))
1872                 return -1;
1873
1874         return 0;
1875 }
1876
1877 /*
1878  * alps_poll() - poll the touchpad for current motion packet.
1879  * Used in resync.
1880  */
1881 static int alps_poll(struct psmouse *psmouse)
1882 {
1883         struct alps_data *priv = psmouse->private;
1884         unsigned char buf[sizeof(psmouse->packet)];
1885         bool poll_failed;
1886
1887         if (priv->flags & ALPS_PASS)
1888                 alps_passthrough_mode_v2(psmouse, true);
1889
1890         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1891                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1892
1893         if (priv->flags & ALPS_PASS)
1894                 alps_passthrough_mode_v2(psmouse, false);
1895
1896         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1897                 return -1;
1898
1899         if ((psmouse->badbyte & 0xc8) == 0x08) {
1900 /*
1901  * Poll the track stick ...
1902  */
1903                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1904                         return -1;
1905         }
1906
1907         memcpy(psmouse->packet, buf, sizeof(buf));
1908         return 0;
1909 }
1910
1911 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1912 {
1913         struct alps_data *priv = psmouse->private;
1914
1915         if ((priv->flags & ALPS_PASS) &&
1916             alps_passthrough_mode_v2(psmouse, true)) {
1917                 return -1;
1918         }
1919
1920         if (alps_tap_mode(psmouse, true)) {
1921                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1922                 return -1;
1923         }
1924
1925         if (alps_absolute_mode_v1_v2(psmouse)) {
1926                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1927                 return -1;
1928         }
1929
1930         if ((priv->flags & ALPS_PASS) &&
1931             alps_passthrough_mode_v2(psmouse, false)) {
1932                 return -1;
1933         }
1934
1935         /* ALPS needs stream mode, otherwise it won't report any data */
1936         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1937                 psmouse_err(psmouse, "Failed to enable stream mode\n");
1938                 return -1;
1939         }
1940
1941         return 0;
1942 }
1943
1944 static int alps_hw_init_v6(struct psmouse *psmouse)
1945 {
1946         unsigned char param[2] = {0xC8, 0x14};
1947
1948         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1949         if (alps_passthrough_mode_v2(psmouse, true))
1950                 return -1;
1951
1952         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1953             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1954             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1955             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1956             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1957                 return -1;
1958
1959         if (alps_passthrough_mode_v2(psmouse, false))
1960                 return -1;
1961
1962         if (alps_absolute_mode_v6(psmouse)) {
1963                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1964                 return -1;
1965         }
1966
1967         return 0;
1968 }
1969
1970 /*
1971  * Enable or disable passthrough mode to the trackstick.
1972  */
1973 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1974                                     int reg_base, bool enable)
1975 {
1976         int reg_val, ret = -1;
1977
1978         if (alps_enter_command_mode(psmouse))
1979                 return -1;
1980
1981         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1982         if (reg_val == -1)
1983                 goto error;
1984
1985         if (enable)
1986                 reg_val |= 0x01;
1987         else
1988                 reg_val &= ~0x01;
1989
1990         ret = __alps_command_mode_write_reg(psmouse, reg_val);
1991
1992 error:
1993         if (alps_exit_command_mode(psmouse))
1994                 ret = -1;
1995         return ret;
1996 }
1997
1998 /* Must be in command mode when calling this function */
1999 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2000 {
2001         int reg_val;
2002
2003         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2004         if (reg_val == -1)
2005                 return -1;
2006
2007         reg_val |= 0x06;
2008         if (__alps_command_mode_write_reg(psmouse, reg_val))
2009                 return -1;
2010
2011         return 0;
2012 }
2013
2014 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2015 {
2016         int ret = -EIO, reg_val;
2017
2018         if (alps_enter_command_mode(psmouse))
2019                 goto error;
2020
2021         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2022         if (reg_val == -1)
2023                 goto error;
2024
2025         /* bit 7: trackstick is present */
2026         ret = reg_val & 0x80 ? 0 : -ENODEV;
2027
2028 error:
2029         alps_exit_command_mode(psmouse);
2030         return ret;
2031 }
2032
2033 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2034 {
2035         struct ps2dev *ps2dev = &psmouse->ps2dev;
2036         int ret = 0;
2037         unsigned char param[4];
2038
2039         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2040                 return -EIO;
2041
2042         /*
2043          * E7 report for the trackstick
2044          *
2045          * There have been reports of failures to seem to trace back
2046          * to the above trackstick check failing. When these occur
2047          * this E7 report fails, so when that happens we continue
2048          * with the assumption that there isn't a trackstick after
2049          * all.
2050          */
2051         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2052                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2053                 ret = -ENODEV;
2054         } else {
2055                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2056
2057                 /*
2058                  * Not sure what this does, but it is absolutely
2059                  * essential. Without it, the touchpad does not
2060                  * work at all and the trackstick just emits normal
2061                  * PS/2 packets.
2062                  */
2063                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2064                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2065                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2066                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2067                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2068                         psmouse_err(psmouse,
2069                                     "Error sending magic E6 sequence\n");
2070                         ret = -EIO;
2071                         goto error;
2072                 }
2073
2074                 /*
2075                  * This ensures the trackstick packets are in the format
2076                  * supported by this driver. If bit 1 isn't set the packet
2077                  * format is different.
2078                  */
2079                 if (alps_enter_command_mode(psmouse) ||
2080                     alps_command_mode_write_reg(psmouse,
2081                                                 reg_base + 0x08, 0x82) ||
2082                     alps_exit_command_mode(psmouse))
2083                         ret = -EIO;
2084         }
2085
2086 error:
2087         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2088                 ret = -EIO;
2089
2090         return ret;
2091 }
2092
2093 static int alps_hw_init_v3(struct psmouse *psmouse)
2094 {
2095         struct ps2dev *ps2dev = &psmouse->ps2dev;
2096         int reg_val;
2097         unsigned char param[4];
2098
2099         reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2100         if (reg_val == -EIO)
2101                 goto error;
2102
2103         if (reg_val == 0 &&
2104             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2105                 goto error;
2106
2107         if (alps_enter_command_mode(psmouse) ||
2108             alps_absolute_mode_v3(psmouse)) {
2109                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2110                 goto error;
2111         }
2112
2113         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2114         if (reg_val == -1)
2115                 goto error;
2116         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2117                 goto error;
2118
2119         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2120         if (reg_val == -1)
2121                 goto error;
2122         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2123                 goto error;
2124
2125         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2126                 goto error;
2127         if (__alps_command_mode_write_reg(psmouse, 0x04))
2128                 goto error;
2129
2130         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2131                 goto error;
2132         if (__alps_command_mode_write_reg(psmouse, 0x03))
2133                 goto error;
2134
2135         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2136                 goto error;
2137         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2138                 goto error;
2139
2140         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2141                 goto error;
2142         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2143                 goto error;
2144
2145         alps_exit_command_mode(psmouse);
2146
2147         /* Set rate and enable data reporting */
2148         param[0] = 0x64;
2149         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2150             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2151                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2152                 return -1;
2153         }
2154
2155         return 0;
2156
2157 error:
2158         /*
2159          * Leaving the touchpad in command mode will essentially render
2160          * it unusable until the machine reboots, so exit it here just
2161          * to be safe
2162          */
2163         alps_exit_command_mode(psmouse);
2164         return -1;
2165 }
2166
2167 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2168 {
2169         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2170         struct alps_data *priv = psmouse->private;
2171
2172         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2173         if (reg < 0)
2174                 return reg;
2175
2176         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2177         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2178
2179         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2180         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2181
2182         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2183         if (reg < 0)
2184                 return reg;
2185
2186         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2187         x_electrode = 17 + x_electrode;
2188
2189         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2190         y_electrode = 13 + y_electrode;
2191
2192         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2193         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2194
2195         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2196         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2197
2198         psmouse_dbg(psmouse,
2199                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2200                     x_pitch, y_pitch, x_electrode, y_electrode,
2201                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2202
2203         return 0;
2204 }
2205
2206 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2207 {
2208         struct alps_data *priv = psmouse->private;
2209         struct ps2dev *ps2dev = &psmouse->ps2dev;
2210         int reg_val, ret = -1;
2211
2212         if (priv->flags & ALPS_DUALPOINT) {
2213                 reg_val = alps_setup_trackstick_v3(psmouse,
2214                                                    ALPS_REG_BASE_RUSHMORE);
2215                 if (reg_val == -EIO)
2216                         goto error;
2217         }
2218
2219         if (alps_enter_command_mode(psmouse) ||
2220             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2221             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2222                 goto error;
2223
2224         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2225                 goto error;
2226
2227         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2228         if (reg_val == -1)
2229                 goto error;
2230         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2231                 goto error;
2232
2233         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2234                 goto error;
2235
2236         /* enter absolute mode */
2237         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2238         if (reg_val == -1)
2239                 goto error;
2240         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2241                 goto error;
2242
2243         alps_exit_command_mode(psmouse);
2244         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2245
2246 error:
2247         alps_exit_command_mode(psmouse);
2248         return ret;
2249 }
2250
2251 /* Must be in command mode when calling this function */
2252 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2253 {
2254         int reg_val;
2255
2256         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2257         if (reg_val == -1)
2258                 return -1;
2259
2260         reg_val |= 0x02;
2261         if (__alps_command_mode_write_reg(psmouse, reg_val))
2262                 return -1;
2263
2264         return 0;
2265 }
2266
2267 static int alps_hw_init_v4(struct psmouse *psmouse)
2268 {
2269         struct ps2dev *ps2dev = &psmouse->ps2dev;
2270         unsigned char param[4];
2271
2272         if (alps_enter_command_mode(psmouse))
2273                 goto error;
2274
2275         if (alps_absolute_mode_v4(psmouse)) {
2276                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2277                 goto error;
2278         }
2279
2280         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2281                 goto error;
2282
2283         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2284                 goto error;
2285
2286         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2287                 goto error;
2288
2289         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2290                 goto error;
2291
2292         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2293                 goto error;
2294
2295         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2296                 goto error;
2297
2298         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2299                 goto error;
2300
2301         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2302                 goto error;
2303
2304         alps_exit_command_mode(psmouse);
2305
2306         /*
2307          * This sequence changes the output from a 9-byte to an
2308          * 8-byte format. All the same data seems to be present,
2309          * just in a more compact format.
2310          */
2311         param[0] = 0xc8;
2312         param[1] = 0x64;
2313         param[2] = 0x50;
2314         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2315             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2316             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2317             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2318                 return -1;
2319
2320         /* Set rate and enable data reporting */
2321         param[0] = 0x64;
2322         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2323             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2324                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2325                 return -1;
2326         }
2327
2328         return 0;
2329
2330 error:
2331         /*
2332          * Leaving the touchpad in command mode will essentially render
2333          * it unusable until the machine reboots, so exit it here just
2334          * to be safe
2335          */
2336         alps_exit_command_mode(psmouse);
2337         return -1;
2338 }
2339
2340 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2341                                       unsigned char index, unsigned char otp[])
2342 {
2343         struct ps2dev *ps2dev = &psmouse->ps2dev;
2344
2345         switch (index) {
2346         case 0:
2347                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2348                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2349                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2350                         return -1;
2351
2352                 break;
2353
2354         case 1:
2355                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2356                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2357                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2358                         return -1;
2359
2360                 break;
2361         }
2362
2363         return 0;
2364 }
2365
2366 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2367                                           struct alps_data *priv)
2368 {
2369         int num_x_electrode;
2370         int num_y_electrode;
2371         int x_pitch, y_pitch, x_phys, y_phys;
2372
2373         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2374         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2375
2376         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2377         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2378
2379         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2380         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2381
2382         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2383         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2384
2385         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2386         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2387
2388         return 0;
2389 }
2390
2391 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2392                                        struct alps_data *priv)
2393 {
2394         unsigned char is_btnless;
2395
2396         is_btnless = (otp[1][1] >> 3) & 0x01;
2397
2398         if (is_btnless)
2399                 priv->flags |= ALPS_BUTTONPAD;
2400
2401         return 0;
2402 }
2403
2404 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2405                                     struct alps_data *priv)
2406 {
2407         unsigned char otp[2][4];
2408
2409         memset(otp, 0, sizeof(otp));
2410
2411         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2412             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2413                 return -1;
2414
2415         alps_update_device_area_ss4_v2(otp, priv);
2416
2417         alps_update_btn_info_ss4_v2(otp, priv);
2418
2419         return 0;
2420 }
2421
2422 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2423                                         struct alps_data *priv)
2424 {
2425         struct ps2dev *ps2dev = &psmouse->ps2dev;
2426         unsigned char param[4] = {0};
2427         int num_x_electrode, num_y_electrode;
2428
2429         if (alps_enter_command_mode(psmouse))
2430                 return -1;
2431
2432         param[0] = 0x0a;
2433         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2434             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2435             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2436             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2437             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2438                 return -1;
2439
2440         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2441                 return -1;
2442
2443         /*
2444          * Dolphin's sensor line number is not fixed. It can be calculated
2445          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2446          * Further more, we can get device's x_max and y_max by multiplying
2447          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2448          *
2449          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2450          *      real sensor line number X = 11 + 8 = 19, and
2451          *      real sensor line number Y = 8 + 1 = 9.
2452          *      So, x_max = (19 - 1) * 64 = 1152, and
2453          *          y_max = (9 - 1) * 64 = 512.
2454          */
2455         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2456         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2457         priv->x_bits = num_x_electrode;
2458         priv->y_bits = num_y_electrode;
2459         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2460         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2461
2462         if (alps_exit_command_mode(psmouse))
2463                 return -1;
2464
2465         return 0;
2466 }
2467
2468 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2469 {
2470         struct ps2dev *ps2dev = &psmouse->ps2dev;
2471         unsigned char param[2];
2472
2473         /* This is dolphin "v1" as empirically defined by florin9doi */
2474         param[0] = 0x64;
2475         param[1] = 0x28;
2476
2477         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2478             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2479             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2480                 return -1;
2481
2482         return 0;
2483 }
2484
2485 static int alps_hw_init_v7(struct psmouse *psmouse)
2486 {
2487         struct ps2dev *ps2dev = &psmouse->ps2dev;
2488         int reg_val, ret = -1;
2489
2490         if (alps_enter_command_mode(psmouse) ||
2491             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2492                 goto error;
2493
2494         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2495                 goto error;
2496
2497         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2498                 goto error;
2499
2500         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2501         if (reg_val == -1)
2502                 goto error;
2503         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2504                 goto error;
2505
2506         alps_exit_command_mode(psmouse);
2507         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2508
2509 error:
2510         alps_exit_command_mode(psmouse);
2511         return ret;
2512 }
2513
2514 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2515 {
2516         struct ps2dev *ps2dev = &psmouse->ps2dev;
2517         char param[2] = {0x64, 0x28};
2518         int ret = -1;
2519
2520         /* enter absolute mode */
2521         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2522             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2523             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2524             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2525                 goto error;
2526         }
2527
2528         /* T.B.D. Decread noise packet number, delete in the future */
2529         if (alps_exit_command_mode(psmouse) ||
2530             alps_enter_command_mode(psmouse) ||
2531             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2532                 goto error;
2533         }
2534         alps_exit_command_mode(psmouse);
2535
2536         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2537
2538 error:
2539         alps_exit_command_mode(psmouse);
2540         return ret;
2541 }
2542
2543 static int alps_set_protocol(struct psmouse *psmouse,
2544                              struct alps_data *priv,
2545                              const struct alps_protocol_info *protocol)
2546 {
2547         psmouse->private = priv;
2548
2549         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2550
2551         priv->proto_version = protocol->version;
2552         priv->byte0 = protocol->byte0;
2553         priv->mask0 = protocol->mask0;
2554         priv->flags = protocol->flags;
2555         if (dmi_name_in_vendors("Dell"))
2556                 priv->flags |= ALPS_DELL;
2557
2558         priv->x_max = 2000;
2559         priv->y_max = 1400;
2560         priv->x_bits = 15;
2561         priv->y_bits = 11;
2562
2563         switch (priv->proto_version) {
2564         case ALPS_PROTO_V1:
2565         case ALPS_PROTO_V2:
2566                 priv->hw_init = alps_hw_init_v1_v2;
2567                 priv->process_packet = alps_process_packet_v1_v2;
2568                 priv->set_abs_params = alps_set_abs_params_st;
2569                 priv->x_max = 1023;
2570                 priv->y_max = 767;
2571                 break;
2572
2573         case ALPS_PROTO_V3:
2574                 priv->hw_init = alps_hw_init_v3;
2575                 priv->process_packet = alps_process_packet_v3;
2576                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2577                 priv->decode_fields = alps_decode_pinnacle;
2578                 priv->nibble_commands = alps_v3_nibble_commands;
2579                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2580                 break;
2581
2582         case ALPS_PROTO_V3_RUSHMORE:
2583                 priv->hw_init = alps_hw_init_rushmore_v3;
2584                 priv->process_packet = alps_process_packet_v3;
2585                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2586                 priv->decode_fields = alps_decode_rushmore;
2587                 priv->nibble_commands = alps_v3_nibble_commands;
2588                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2589                 priv->x_bits = 16;
2590                 priv->y_bits = 12;
2591
2592                 if (alps_probe_trackstick_v3(psmouse,
2593                                              ALPS_REG_BASE_RUSHMORE) < 0)
2594                         priv->flags &= ~ALPS_DUALPOINT;
2595
2596                 break;
2597
2598         case ALPS_PROTO_V4:
2599                 priv->hw_init = alps_hw_init_v4;
2600                 priv->process_packet = alps_process_packet_v4;
2601                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2602                 priv->nibble_commands = alps_v4_nibble_commands;
2603                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2604                 break;
2605
2606         case ALPS_PROTO_V5:
2607                 priv->hw_init = alps_hw_init_dolphin_v1;
2608                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2609                 priv->decode_fields = alps_decode_dolphin;
2610                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2611                 priv->nibble_commands = alps_v3_nibble_commands;
2612                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2613                 priv->x_bits = 23;
2614                 priv->y_bits = 12;
2615
2616                 if (alps_dolphin_get_device_area(psmouse, priv))
2617                         return -EIO;
2618
2619                 break;
2620
2621         case ALPS_PROTO_V6:
2622                 priv->hw_init = alps_hw_init_v6;
2623                 priv->process_packet = alps_process_packet_v6;
2624                 priv->set_abs_params = alps_set_abs_params_st;
2625                 priv->nibble_commands = alps_v6_nibble_commands;
2626                 priv->x_max = 2047;
2627                 priv->y_max = 1535;
2628                 break;
2629
2630         case ALPS_PROTO_V7:
2631                 priv->hw_init = alps_hw_init_v7;
2632                 priv->process_packet = alps_process_packet_v7;
2633                 priv->decode_fields = alps_decode_packet_v7;
2634                 priv->set_abs_params = alps_set_abs_params_v7;
2635                 priv->nibble_commands = alps_v3_nibble_commands;
2636                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2637                 priv->x_max = 0xfff;
2638                 priv->y_max = 0x7ff;
2639
2640                 if (priv->fw_ver[1] != 0xba)
2641                         priv->flags |= ALPS_BUTTONPAD;
2642
2643                 break;
2644
2645         case ALPS_PROTO_V8:
2646                 priv->hw_init = alps_hw_init_ss4_v2;
2647                 priv->process_packet = alps_process_packet_ss4_v2;
2648                 priv->decode_fields = alps_decode_ss4_v2;
2649                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2650                 priv->nibble_commands = alps_v3_nibble_commands;
2651                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2652
2653                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2654                         return -EIO;
2655
2656                 break;
2657         }
2658
2659         return 0;
2660 }
2661
2662 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2663                                                          unsigned char *ec)
2664 {
2665         const struct alps_model_info *model;
2666         int i;
2667
2668         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2669                 model = &alps_model_data[i];
2670
2671                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2672                     (!model->command_mode_resp ||
2673                      model->command_mode_resp == ec[2])) {
2674
2675                         return &model->protocol_info;
2676                 }
2677         }
2678
2679         return NULL;
2680 }
2681
2682 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2683 {
2684         const struct alps_protocol_info *protocol;
2685         unsigned char e6[4], e7[4], ec[4];
2686         int error;
2687
2688         /*
2689          * First try "E6 report".
2690          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2691          * The bits 0-2 of the first byte will be 1s if some buttons are
2692          * pressed.
2693          */
2694         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2695                          PSMOUSE_CMD_SETSCALE11, e6))
2696                 return -EIO;
2697
2698         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2699                 return -EINVAL;
2700
2701         /*
2702          * Now get the "E7" and "EC" reports.  These will uniquely identify
2703          * most ALPS touchpads.
2704          */
2705         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2706                          PSMOUSE_CMD_SETSCALE21, e7) ||
2707             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2708                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2709             alps_exit_command_mode(psmouse))
2710                 return -EIO;
2711
2712         protocol = alps_match_table(e7, ec);
2713         if (!protocol) {
2714                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2715                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2716                         protocol = &alps_v5_protocol_data;
2717                 } else if (ec[0] == 0x88 &&
2718                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2719                         protocol = &alps_v7_protocol_data;
2720                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2721                         protocol = &alps_v3_rushmore_data;
2722                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2723                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2724                         protocol = &alps_v3_protocol_data;
2725                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2726                            e7[2] == 0x14 && ec[1] == 0x02) {
2727                         protocol = &alps_v8_protocol_data;
2728                 } else {
2729                         psmouse_dbg(psmouse,
2730                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2731                         return -EINVAL;
2732                 }
2733         }
2734
2735         if (priv) {
2736                 /* Save the Firmware version */
2737                 memcpy(priv->fw_ver, ec, 3);
2738                 error = alps_set_protocol(psmouse, priv, protocol);
2739                 if (error)
2740                         return error;
2741         }
2742
2743         return 0;
2744 }
2745
2746 static int alps_reconnect(struct psmouse *psmouse)
2747 {
2748         struct alps_data *priv = psmouse->private;
2749
2750         psmouse_reset(psmouse);
2751
2752         if (alps_identify(psmouse, priv) < 0)
2753                 return -1;
2754
2755         return priv->hw_init(psmouse);
2756 }
2757
2758 static void alps_disconnect(struct psmouse *psmouse)
2759 {
2760         struct alps_data *priv = psmouse->private;
2761
2762         psmouse_reset(psmouse);
2763         del_timer_sync(&priv->timer);
2764         if (priv->dev2)
2765                 input_unregister_device(priv->dev2);
2766         if (!IS_ERR_OR_NULL(priv->dev3))
2767                 input_unregister_device(priv->dev3);
2768         kfree(priv);
2769 }
2770
2771 static void alps_set_abs_params_st(struct alps_data *priv,
2772                                    struct input_dev *dev1)
2773 {
2774         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2775         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2776         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2777 }
2778
2779 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2780                                           struct input_dev *dev1)
2781 {
2782         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2783         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2784
2785         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2786         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2787
2788         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2789         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2790 }
2791
2792 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2793                                         struct input_dev *dev1)
2794 {
2795         alps_set_abs_params_mt_common(priv, dev1);
2796         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2797
2798         input_mt_init_slots(dev1, MAX_TOUCHES,
2799                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2800                                 INPUT_MT_SEMI_MT);
2801 }
2802
2803 static void alps_set_abs_params_v7(struct alps_data *priv,
2804                                    struct input_dev *dev1)
2805 {
2806         alps_set_abs_params_mt_common(priv, dev1);
2807         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2808
2809         input_mt_init_slots(dev1, MAX_TOUCHES,
2810                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2811                                 INPUT_MT_TRACK);
2812
2813         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2814 }
2815
2816 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2817                                        struct input_dev *dev1)
2818 {
2819         alps_set_abs_params_mt_common(priv, dev1);
2820         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2821         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2822
2823         input_mt_init_slots(dev1, MAX_TOUCHES,
2824                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2825                                 INPUT_MT_TRACK);
2826 }
2827
2828 int alps_init(struct psmouse *psmouse)
2829 {
2830         struct alps_data *priv = psmouse->private;
2831         struct input_dev *dev1 = psmouse->dev;
2832         int error;
2833
2834         error = priv->hw_init(psmouse);
2835         if (error)
2836                 goto init_fail;
2837
2838         /*
2839          * Undo part of setup done for us by psmouse core since touchpad
2840          * is not a relative device.
2841          */
2842         __clear_bit(EV_REL, dev1->evbit);
2843         __clear_bit(REL_X, dev1->relbit);
2844         __clear_bit(REL_Y, dev1->relbit);
2845
2846         /*
2847          * Now set up our capabilities.
2848          */
2849         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2850         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2851         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2852         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2853                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2854
2855         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2856
2857         priv->set_abs_params(priv, dev1);
2858
2859         if (priv->flags & ALPS_WHEEL) {
2860                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2861                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2862         }
2863
2864         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2865                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2866                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2867         }
2868
2869         if (priv->flags & ALPS_FOUR_BUTTONS) {
2870                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2871                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2872                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2873                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2874         } else if (priv->flags & ALPS_BUTTONPAD) {
2875                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2876                 clear_bit(BTN_RIGHT, dev1->keybit);
2877         } else {
2878                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2879         }
2880
2881         if (priv->flags & ALPS_DUALPOINT) {
2882                 struct input_dev *dev2;
2883
2884                 dev2 = input_allocate_device();
2885                 if (!dev2) {
2886                         psmouse_err(psmouse,
2887                                     "failed to allocate trackstick device\n");
2888                         error = -ENOMEM;
2889                         goto init_fail;
2890                 }
2891
2892                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2893                          psmouse->ps2dev.serio->phys);
2894                 dev2->phys = priv->phys2;
2895
2896                 /*
2897                  * format of input device name is: "protocol vendor name"
2898                  * see function psmouse_switch_protocol() in psmouse-base.c
2899                  */
2900                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2901
2902                 dev2->id.bustype = BUS_I8042;
2903                 dev2->id.vendor  = 0x0002;
2904                 dev2->id.product = PSMOUSE_ALPS;
2905                 dev2->id.version = priv->proto_version;
2906                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2907
2908                 input_set_capability(dev2, EV_REL, REL_X);
2909                 input_set_capability(dev2, EV_REL, REL_Y);
2910                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2911                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2912                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2913
2914                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2915                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2916
2917                 error = input_register_device(dev2);
2918                 if (error) {
2919                         psmouse_err(psmouse,
2920                                     "failed to register trackstick device: %d\n",
2921                                     error);
2922                         input_free_device(dev2);
2923                         goto init_fail;
2924                 }
2925
2926                 priv->dev2 = dev2;
2927         }
2928
2929         priv->psmouse = psmouse;
2930
2931         INIT_DELAYED_WORK(&priv->dev3_register_work,
2932                           alps_register_bare_ps2_mouse);
2933
2934         psmouse->protocol_handler = alps_process_byte;
2935         psmouse->poll = alps_poll;
2936         psmouse->disconnect = alps_disconnect;
2937         psmouse->reconnect = alps_reconnect;
2938         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2939
2940         /* We are having trouble resyncing ALPS touchpads so disable it for now */
2941         psmouse->resync_time = 0;
2942
2943         /* Allow 2 invalid packets without resetting device */
2944         psmouse->resetafter = psmouse->pktsize * 2;
2945
2946         return 0;
2947
2948 init_fail:
2949         psmouse_reset(psmouse);
2950         /*
2951          * Even though we did not allocate psmouse->private we do free
2952          * it here.
2953          */
2954         kfree(psmouse->private);
2955         psmouse->private = NULL;
2956         return error;
2957 }
2958
2959 int alps_detect(struct psmouse *psmouse, bool set_properties)
2960 {
2961         struct alps_data *priv;
2962         int error;
2963
2964         error = alps_identify(psmouse, NULL);
2965         if (error)
2966                 return error;
2967
2968         /*
2969          * Reset the device to make sure it is fully operational:
2970          * on some laptops, like certain Dell Latitudes, we may
2971          * fail to properly detect presence of trackstick if device
2972          * has not been reset.
2973          */
2974         psmouse_reset(psmouse);
2975
2976         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2977         if (!priv)
2978                 return -ENOMEM;
2979
2980         error = alps_identify(psmouse, priv);
2981         if (error) {
2982                 kfree(priv);
2983                 return error;
2984         }
2985
2986         if (set_properties) {
2987                 psmouse->vendor = "ALPS";
2988                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2989                                 "DualPoint TouchPad" : "GlidePoint";
2990                 psmouse->model = priv->proto_version;
2991         } else {
2992                 /*
2993                  * Destroy alps_data structure we allocated earlier since
2994                  * this was just a "trial run". Otherwise we'll keep it
2995                  * to be used by alps_init() which has to be called if
2996                  * we succeed and set_properties is true.
2997                  */
2998                 kfree(priv);
2999                 psmouse->private = NULL;
3000         }
3001
3002         return 0;
3003 }
3004