Merge tag 'sound-4.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
[muen/linux.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_V7        0xc2c0
35 #define ALPS_REG_BASE_PINNACLE  0x0000
36
37 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
38         { PSMOUSE_CMD_SETPOLL,          0x00 }, /* 0 */
39         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
40         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
41         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
42         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
43         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
44         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
45         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
46         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
47         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
48         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
49         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
50         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
51         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
52         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
53         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
54 };
55
56 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
57         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
58         { PSMOUSE_CMD_RESET_DIS,        0x00 }, /* 1 */
59         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* 2 */
60         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 3 */
61         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 4 */
62         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 5 */
63         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 6 */
64         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 7 */
65         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 8 */
66         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 9 */
67         { ALPS_CMD_NIBBLE_10,           0x00 }, /* a */
68         { PSMOUSE_CMD_SETRES,           0x00 }, /* b */
69         { PSMOUSE_CMD_SETRES,           0x01 }, /* c */
70         { PSMOUSE_CMD_SETRES,           0x02 }, /* d */
71         { PSMOUSE_CMD_SETRES,           0x03 }, /* e */
72         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
73 };
74
75 static const struct alps_nibble_commands alps_v6_nibble_commands[] = {
76         { PSMOUSE_CMD_ENABLE,           0x00 }, /* 0 */
77         { PSMOUSE_CMD_SETRATE,          0x0a }, /* 1 */
78         { PSMOUSE_CMD_SETRATE,          0x14 }, /* 2 */
79         { PSMOUSE_CMD_SETRATE,          0x28 }, /* 3 */
80         { PSMOUSE_CMD_SETRATE,          0x3c }, /* 4 */
81         { PSMOUSE_CMD_SETRATE,          0x50 }, /* 5 */
82         { PSMOUSE_CMD_SETRATE,          0x64 }, /* 6 */
83         { PSMOUSE_CMD_SETRATE,          0xc8 }, /* 7 */
84         { PSMOUSE_CMD_GETID,            0x00 }, /* 8 */
85         { PSMOUSE_CMD_GETINFO,          0x00 }, /* 9 */
86         { PSMOUSE_CMD_SETRES,           0x00 }, /* a */
87         { PSMOUSE_CMD_SETRES,           0x01 }, /* b */
88         { PSMOUSE_CMD_SETRES,           0x02 }, /* c */
89         { PSMOUSE_CMD_SETRES,           0x03 }, /* d */
90         { PSMOUSE_CMD_SETSCALE21,       0x00 }, /* e */
91         { PSMOUSE_CMD_SETSCALE11,       0x00 }, /* f */
92 };
93
94
95 #define ALPS_DUALPOINT          0x02    /* touchpad has trackstick */
96 #define ALPS_PASS               0x04    /* device has a pass-through port */
97
98 #define ALPS_WHEEL              0x08    /* hardware wheel present */
99 #define ALPS_FW_BK_1            0x10    /* front & back buttons present */
100 #define ALPS_FW_BK_2            0x20    /* front & back buttons present */
101 #define ALPS_FOUR_BUTTONS       0x40    /* 4 direction button present */
102 #define ALPS_PS2_INTERLEAVED    0x80    /* 3-byte PS/2 packet interleaved with
103                                            6-byte ALPS packet */
104 #define ALPS_STICK_BITS         0x100   /* separate stick button bits */
105 #define ALPS_BUTTONPAD          0x200   /* device is a clickpad */
106 #define ALPS_DUALPOINT_WITH_PRESSURE    0x400   /* device can report trackpoint pressure */
107
108 static const struct alps_model_info alps_model_data[] = {
109         { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Toshiba Salellite Pro M10 */
110         { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } },                               /* UMAX-530T */
111         { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
112         { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
113         { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },                               /* HP ze1115 */
114         { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
115         { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
116         { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Fujitsu Siemens S6010 */
117         { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } },              /* Toshiba Satellite S2400-103 */
118         { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } },            /* NEC Versa L320 */
119         { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
120         { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D800 */
121         { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } },          /* ThinkPad R61 8918-5QG */
122         { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
123         { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } },            /* Ahtec Laptop */
124
125         /*
126          * XXX This entry is suspicious. First byte has zero lower nibble,
127          * which is what a normal mouse would report. Also, the value 0x0e
128          * isn't valid per PS/2 spec.
129          */
130         { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
131
132         { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
133         { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } },      /* Dell Latitude D600 */
134         /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
135         { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf,
136                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },
137         { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } },          /* Dell XT2 */
138         { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } },       /* Dell Vostro 1400 */
139         { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff,
140                 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } },                          /* Toshiba Tecra A11-11L */
141         { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } },
142 };
143
144 static const struct alps_protocol_info alps_v3_protocol_data = {
145         ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT
146 };
147
148 static const struct alps_protocol_info alps_v3_rushmore_data = {
149         ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT
150 };
151
152 static const struct alps_protocol_info alps_v5_protocol_data = {
153         ALPS_PROTO_V5, 0xc8, 0xd8, 0
154 };
155
156 static const struct alps_protocol_info alps_v7_protocol_data = {
157         ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT
158 };
159
160 static const struct alps_protocol_info alps_v8_protocol_data = {
161         ALPS_PROTO_V8, 0x18, 0x18, 0
162 };
163
164 /*
165  * Some v2 models report the stick buttons in separate bits
166  */
167 static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
168 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
169         {
170                 /* Extrapolated from other entries */
171                 .matches = {
172                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
173                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
174                 },
175         },
176         {
177                 /* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */
178                 .matches = {
179                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
180                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
181                 },
182         },
183         {
184                 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
185                 .matches = {
186                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
187                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
188                 },
189         },
190         {
191                 /* Extrapolated from other entries */
192                 .matches = {
193                         DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
194                         DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
195                 },
196         },
197 #endif
198         { }
199 };
200
201 static void alps_set_abs_params_st(struct alps_data *priv,
202                                    struct input_dev *dev1);
203 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
204                                         struct input_dev *dev1);
205 static void alps_set_abs_params_v7(struct alps_data *priv,
206                                    struct input_dev *dev1);
207 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
208                                        struct input_dev *dev1);
209
210 /* Packet formats are described in Documentation/input/alps.txt */
211
212 static bool alps_is_valid_first_byte(struct alps_data *priv,
213                                      unsigned char data)
214 {
215         return (data & priv->mask0) == priv->byte0;
216 }
217
218 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
219                                 int left, int right, int middle)
220 {
221         struct input_dev *dev;
222
223         /*
224          * If shared button has already been reported on the
225          * other device (dev2) then this event should be also
226          * sent through that device.
227          */
228         dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
229         input_report_key(dev, BTN_LEFT, left);
230
231         dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
232         input_report_key(dev, BTN_RIGHT, right);
233
234         dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
235         input_report_key(dev, BTN_MIDDLE, middle);
236
237         /*
238          * Sync the _other_ device now, we'll do the first
239          * device later once we report the rest of the events.
240          */
241         if (dev2)
242                 input_sync(dev2);
243 }
244
245 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
246 {
247         struct alps_data *priv = psmouse->private;
248         unsigned char *packet = psmouse->packet;
249         struct input_dev *dev = psmouse->dev;
250         struct input_dev *dev2 = priv->dev2;
251         int x, y, z, ges, fin, left, right, middle;
252         int back = 0, forward = 0;
253
254         if (priv->proto_version == ALPS_PROTO_V1) {
255                 left = packet[2] & 0x10;
256                 right = packet[2] & 0x08;
257                 middle = 0;
258                 x = packet[1] | ((packet[0] & 0x07) << 7);
259                 y = packet[4] | ((packet[3] & 0x07) << 7);
260                 z = packet[5];
261         } else {
262                 left = packet[3] & 1;
263                 right = packet[3] & 2;
264                 middle = packet[3] & 4;
265                 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
266                 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
267                 z = packet[5];
268         }
269
270         if (priv->flags & ALPS_FW_BK_1) {
271                 back = packet[0] & 0x10;
272                 forward = packet[2] & 4;
273         }
274
275         if (priv->flags & ALPS_FW_BK_2) {
276                 back = packet[3] & 4;
277                 forward = packet[2] & 4;
278                 if ((middle = forward && back))
279                         forward = back = 0;
280         }
281
282         ges = packet[2] & 1;
283         fin = packet[2] & 2;
284
285         if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
286                 input_report_rel(dev2, REL_X,  (x > 383 ? (x - 768) : x));
287                 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
288
289                 alps_report_buttons(dev2, dev, left, right, middle);
290
291                 input_sync(dev2);
292                 return;
293         }
294
295         /* Some models have separate stick button bits */
296         if (priv->flags & ALPS_STICK_BITS) {
297                 left |= packet[0] & 1;
298                 right |= packet[0] & 2;
299                 middle |= packet[0] & 4;
300         }
301
302         alps_report_buttons(dev, dev2, left, right, middle);
303
304         /* Convert hardware tap to a reasonable Z value */
305         if (ges && !fin)
306                 z = 40;
307
308         /*
309          * A "tap and drag" operation is reported by the hardware as a transition
310          * from (!fin && ges) to (fin && ges). This should be translated to the
311          * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
312          */
313         if (ges && fin && !priv->prev_fin) {
314                 input_report_abs(dev, ABS_X, x);
315                 input_report_abs(dev, ABS_Y, y);
316                 input_report_abs(dev, ABS_PRESSURE, 0);
317                 input_report_key(dev, BTN_TOOL_FINGER, 0);
318                 input_sync(dev);
319         }
320         priv->prev_fin = fin;
321
322         if (z > 30)
323                 input_report_key(dev, BTN_TOUCH, 1);
324         if (z < 25)
325                 input_report_key(dev, BTN_TOUCH, 0);
326
327         if (z > 0) {
328                 input_report_abs(dev, ABS_X, x);
329                 input_report_abs(dev, ABS_Y, y);
330         }
331
332         input_report_abs(dev, ABS_PRESSURE, z);
333         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
334
335         if (priv->flags & ALPS_WHEEL)
336                 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
337
338         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
339                 input_report_key(dev, BTN_FORWARD, forward);
340                 input_report_key(dev, BTN_BACK, back);
341         }
342
343         if (priv->flags & ALPS_FOUR_BUTTONS) {
344                 input_report_key(dev, BTN_0, packet[2] & 4);
345                 input_report_key(dev, BTN_1, packet[0] & 0x10);
346                 input_report_key(dev, BTN_2, packet[3] & 4);
347                 input_report_key(dev, BTN_3, packet[0] & 0x20);
348         }
349
350         input_sync(dev);
351 }
352
353 static void alps_get_bitmap_points(unsigned int map,
354                                    struct alps_bitmap_point *low,
355                                    struct alps_bitmap_point *high,
356                                    int *fingers)
357 {
358         struct alps_bitmap_point *point;
359         int i, bit, prev_bit = 0;
360
361         point = low;
362         for (i = 0; map != 0; i++, map >>= 1) {
363                 bit = map & 1;
364                 if (bit) {
365                         if (!prev_bit) {
366                                 point->start_bit = i;
367                                 point->num_bits = 0;
368                                 (*fingers)++;
369                         }
370                         point->num_bits++;
371                 } else {
372                         if (prev_bit)
373                                 point = high;
374                 }
375                 prev_bit = bit;
376         }
377 }
378
379 /*
380  * Process bitmap data from semi-mt protocols. Returns the number of
381  * fingers detected. A return value of 0 means at least one of the
382  * bitmaps was empty.
383  *
384  * The bitmaps don't have enough data to track fingers, so this function
385  * only generates points representing a bounding box of all contacts.
386  * These points are returned in fields->mt when the return value
387  * is greater than 0.
388  */
389 static int alps_process_bitmap(struct alps_data *priv,
390                                struct alps_fields *fields)
391 {
392         int i, fingers_x = 0, fingers_y = 0, fingers, closest;
393         struct alps_bitmap_point x_low = {0,}, x_high = {0,};
394         struct alps_bitmap_point y_low = {0,}, y_high = {0,};
395         struct input_mt_pos corner[4];
396
397         if (!fields->x_map || !fields->y_map)
398                 return 0;
399
400         alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
401         alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
402
403         /*
404          * Fingers can overlap, so we use the maximum count of fingers
405          * on either axis as the finger count.
406          */
407         fingers = max(fingers_x, fingers_y);
408
409         /*
410          * If an axis reports only a single contact, we have overlapping or
411          * adjacent fingers. Divide the single contact between the two points.
412          */
413         if (fingers_x == 1) {
414                 i = (x_low.num_bits - 1) / 2;
415                 x_low.num_bits = x_low.num_bits - i;
416                 x_high.start_bit = x_low.start_bit + i;
417                 x_high.num_bits = max(i, 1);
418         }
419         if (fingers_y == 1) {
420                 i = (y_low.num_bits - 1) / 2;
421                 y_low.num_bits = y_low.num_bits - i;
422                 y_high.start_bit = y_low.start_bit + i;
423                 y_high.num_bits = max(i, 1);
424         }
425
426         /* top-left corner */
427         corner[0].x =
428                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
429                 (2 * (priv->x_bits - 1));
430         corner[0].y =
431                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
432                 (2 * (priv->y_bits - 1));
433
434         /* top-right corner */
435         corner[1].x =
436                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
437                 (2 * (priv->x_bits - 1));
438         corner[1].y =
439                 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
440                 (2 * (priv->y_bits - 1));
441
442         /* bottom-right corner */
443         corner[2].x =
444                 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
445                 (2 * (priv->x_bits - 1));
446         corner[2].y =
447                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
448                 (2 * (priv->y_bits - 1));
449
450         /* bottom-left corner */
451         corner[3].x =
452                 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
453                 (2 * (priv->x_bits - 1));
454         corner[3].y =
455                 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
456                 (2 * (priv->y_bits - 1));
457
458         /* x-bitmap order is reversed on v5 touchpads  */
459         if (priv->proto_version == ALPS_PROTO_V5) {
460                 for (i = 0; i < 4; i++)
461                         corner[i].x = priv->x_max - corner[i].x;
462         }
463
464         /* y-bitmap order is reversed on v3 and v4 touchpads  */
465         if (priv->proto_version == ALPS_PROTO_V3 ||
466             priv->proto_version == ALPS_PROTO_V4) {
467                 for (i = 0; i < 4; i++)
468                         corner[i].y = priv->y_max - corner[i].y;
469         }
470
471         /*
472          * We only select a corner for the second touch once per 2 finger
473          * touch sequence to avoid the chosen corner (and thus the coordinates)
474          * jumping around when the first touch is in the middle.
475          */
476         if (priv->second_touch == -1) {
477                 /* Find corner closest to our st coordinates */
478                 closest = 0x7fffffff;
479                 for (i = 0; i < 4; i++) {
480                         int dx = fields->st.x - corner[i].x;
481                         int dy = fields->st.y - corner[i].y;
482                         int distance = dx * dx + dy * dy;
483
484                         if (distance < closest) {
485                                 priv->second_touch = i;
486                                 closest = distance;
487                         }
488                 }
489                 /* And select the opposite corner to use for the 2nd touch */
490                 priv->second_touch = (priv->second_touch + 2) % 4;
491         }
492
493         fields->mt[0] = fields->st;
494         fields->mt[1] = corner[priv->second_touch];
495
496         return fingers;
497 }
498
499 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
500 {
501         input_mt_slot(dev, slot);
502         input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
503         input_report_abs(dev, ABS_MT_POSITION_X, x);
504         input_report_abs(dev, ABS_MT_POSITION_Y, y);
505 }
506
507 static void alps_report_mt_data(struct psmouse *psmouse, int n)
508 {
509         struct alps_data *priv = psmouse->private;
510         struct input_dev *dev = psmouse->dev;
511         struct alps_fields *f = &priv->f;
512         int i, slot[MAX_TOUCHES];
513
514         input_mt_assign_slots(dev, slot, f->mt, n, 0);
515         for (i = 0; i < n; i++)
516                 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
517
518         input_mt_sync_frame(dev);
519 }
520
521 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
522 {
523         struct alps_data *priv = psmouse->private;
524         struct input_dev *dev = psmouse->dev;
525         struct alps_fields *f = &priv->f;
526
527         /* Use st data when we don't have mt data */
528         if (fingers < 2) {
529                 f->mt[0].x = f->st.x;
530                 f->mt[0].y = f->st.y;
531                 fingers = f->pressure > 0 ? 1 : 0;
532                 priv->second_touch = -1;
533         }
534
535         if (fingers >= 1)
536                 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
537         if (fingers >= 2)
538                 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
539         input_mt_sync_frame(dev);
540
541         input_mt_report_finger_count(dev, fingers);
542
543         input_report_key(dev, BTN_LEFT, f->left);
544         input_report_key(dev, BTN_RIGHT, f->right);
545         input_report_key(dev, BTN_MIDDLE, f->middle);
546
547         input_report_abs(dev, ABS_PRESSURE, f->pressure);
548
549         input_sync(dev);
550 }
551
552 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
553 {
554         struct alps_data *priv = psmouse->private;
555         unsigned char *packet = psmouse->packet;
556         struct input_dev *dev = priv->dev2;
557         int x, y, z, left, right, middle;
558
559         /* It should be a DualPoint when received trackstick packet */
560         if (!(priv->flags & ALPS_DUALPOINT)) {
561                 psmouse_warn(psmouse,
562                              "Rejected trackstick packet from non DualPoint device");
563                 return;
564         }
565
566         /* Sanity check packet */
567         if (!(packet[0] & 0x40)) {
568                 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
569                 return;
570         }
571
572         /*
573          * There's a special packet that seems to indicate the end
574          * of a stream of trackstick data. Filter these out.
575          */
576         if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
577                 return;
578
579         x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
580         y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
581         z = (packet[4] & 0x7c) >> 2;
582
583         /*
584          * The x and y values tend to be quite large, and when used
585          * alone the trackstick is difficult to use. Scale them down
586          * to compensate.
587          */
588         x /= 8;
589         y /= 8;
590
591         input_report_rel(dev, REL_X, x);
592         input_report_rel(dev, REL_Y, -y);
593
594         /*
595          * Most ALPS models report the trackstick buttons in the touchpad
596          * packets, but a few report them here. No reliable way has been
597          * found to differentiate between the models upfront, so we enable
598          * the quirk in response to seeing a button press in the trackstick
599          * packet.
600          */
601         left = packet[3] & 0x01;
602         right = packet[3] & 0x02;
603         middle = packet[3] & 0x04;
604
605         if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
606             (left || right || middle))
607                 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
608
609         if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
610                 input_report_key(dev, BTN_LEFT, left);
611                 input_report_key(dev, BTN_RIGHT, right);
612                 input_report_key(dev, BTN_MIDDLE, middle);
613         }
614
615         input_sync(dev);
616         return;
617 }
618
619 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
620 {
621         f->left = !!(p[3] & 0x01);
622         f->right = !!(p[3] & 0x02);
623         f->middle = !!(p[3] & 0x04);
624
625         f->ts_left = !!(p[3] & 0x10);
626         f->ts_right = !!(p[3] & 0x20);
627         f->ts_middle = !!(p[3] & 0x40);
628 }
629
630 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
631                                  struct psmouse *psmouse)
632 {
633         f->first_mp = !!(p[4] & 0x40);
634         f->is_mp = !!(p[0] & 0x40);
635
636         if (f->is_mp) {
637                 f->fingers = (p[5] & 0x3) + 1;
638                 f->x_map = ((p[4] & 0x7e) << 8) |
639                            ((p[1] & 0x7f) << 2) |
640                            ((p[0] & 0x30) >> 4);
641                 f->y_map = ((p[3] & 0x70) << 4) |
642                            ((p[2] & 0x7f) << 1) |
643                            (p[4] & 0x01);
644         } else {
645                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
646                        ((p[0] & 0x30) >> 4);
647                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
648                 f->pressure = p[5] & 0x7f;
649
650                 alps_decode_buttons_v3(f, p);
651         }
652
653         return 0;
654 }
655
656 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
657                                  struct psmouse *psmouse)
658 {
659         f->first_mp = !!(p[4] & 0x40);
660         f->is_mp = !!(p[5] & 0x40);
661
662         if (f->is_mp) {
663                 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
664                 f->x_map = ((p[5] & 0x10) << 11) |
665                            ((p[4] & 0x7e) << 8) |
666                            ((p[1] & 0x7f) << 2) |
667                            ((p[0] & 0x30) >> 4);
668                 f->y_map = ((p[5] & 0x20) << 6) |
669                            ((p[3] & 0x70) << 4) |
670                            ((p[2] & 0x7f) << 1) |
671                            (p[4] & 0x01);
672         } else {
673                 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
674                        ((p[0] & 0x30) >> 4);
675                 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
676                 f->pressure = p[5] & 0x7f;
677
678                 alps_decode_buttons_v3(f, p);
679         }
680
681         return 0;
682 }
683
684 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
685                                 struct psmouse *psmouse)
686 {
687         u64 palm_data = 0;
688         struct alps_data *priv = psmouse->private;
689
690         f->first_mp = !!(p[0] & 0x02);
691         f->is_mp = !!(p[0] & 0x20);
692
693         if (!f->is_mp) {
694                 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
695                 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
696                 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
697                 alps_decode_buttons_v3(f, p);
698         } else {
699                 f->fingers = ((p[0] & 0x6) >> 1 |
700                      (p[0] & 0x10) >> 2);
701
702                 palm_data = (p[1] & 0x7f) |
703                             ((p[2] & 0x7f) << 7) |
704                             ((p[4] & 0x7f) << 14) |
705                             ((p[5] & 0x7f) << 21) |
706                             ((p[3] & 0x07) << 28) |
707                             (((u64)p[3] & 0x70) << 27) |
708                             (((u64)p[0] & 0x01) << 34);
709
710                 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
711                 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
712
713                 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
714                 f->x_map = (palm_data >> priv->y_bits) &
715                            (BIT(priv->x_bits) - 1);
716         }
717
718         return 0;
719 }
720
721 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
722 {
723         struct alps_data *priv = psmouse->private;
724         unsigned char *packet = psmouse->packet;
725         struct input_dev *dev2 = priv->dev2;
726         struct alps_fields *f = &priv->f;
727         int fingers = 0;
728
729         memset(f, 0, sizeof(*f));
730
731         priv->decode_fields(f, packet, psmouse);
732
733         /*
734          * There's no single feature of touchpad position and bitmap packets
735          * that can be used to distinguish between them. We rely on the fact
736          * that a bitmap packet should always follow a position packet with
737          * bit 6 of packet[4] set.
738          */
739         if (priv->multi_packet) {
740                 /*
741                  * Sometimes a position packet will indicate a multi-packet
742                  * sequence, but then what follows is another position
743                  * packet. Check for this, and when it happens process the
744                  * position packet as usual.
745                  */
746                 if (f->is_mp) {
747                         fingers = f->fingers;
748                         /*
749                          * Bitmap processing uses position packet's coordinate
750                          * data, so we need to do decode it first.
751                          */
752                         priv->decode_fields(f, priv->multi_data, psmouse);
753                         if (alps_process_bitmap(priv, f) == 0)
754                                 fingers = 0; /* Use st data */
755                 } else {
756                         priv->multi_packet = 0;
757                 }
758         }
759
760         /*
761          * Bit 6 of byte 0 is not usually set in position packets. The only
762          * times it seems to be set is in situations where the data is
763          * suspect anyway, e.g. a palm resting flat on the touchpad. Given
764          * this combined with the fact that this bit is useful for filtering
765          * out misidentified bitmap packets, we reject anything with this
766          * bit set.
767          */
768         if (f->is_mp)
769                 return;
770
771         if (!priv->multi_packet && f->first_mp) {
772                 priv->multi_packet = 1;
773                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
774                 return;
775         }
776
777         priv->multi_packet = 0;
778
779         /*
780          * Sometimes the hardware sends a single packet with z = 0
781          * in the middle of a stream. Real releases generate packets
782          * with x, y, and z all zero, so these seem to be flukes.
783          * Ignore them.
784          */
785         if (f->st.x && f->st.y && !f->pressure)
786                 return;
787
788         alps_report_semi_mt_data(psmouse, fingers);
789
790         if ((priv->flags & ALPS_DUALPOINT) &&
791             !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
792                 input_report_key(dev2, BTN_LEFT, f->ts_left);
793                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
794                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
795                 input_sync(dev2);
796         }
797 }
798
799 static void alps_process_packet_v3(struct psmouse *psmouse)
800 {
801         unsigned char *packet = psmouse->packet;
802
803         /*
804          * v3 protocol packets come in three types, two representing
805          * touchpad data and one representing trackstick data.
806          * Trackstick packets seem to be distinguished by always
807          * having 0x3f in the last byte. This value has never been
808          * observed in the last byte of either of the other types
809          * of packets.
810          */
811         if (packet[5] == 0x3f) {
812                 alps_process_trackstick_packet_v3(psmouse);
813                 return;
814         }
815
816         alps_process_touchpad_packet_v3_v5(psmouse);
817 }
818
819 static void alps_process_packet_v6(struct psmouse *psmouse)
820 {
821         struct alps_data *priv = psmouse->private;
822         unsigned char *packet = psmouse->packet;
823         struct input_dev *dev = psmouse->dev;
824         struct input_dev *dev2 = priv->dev2;
825         int x, y, z, left, right, middle;
826
827         /*
828          * We can use Byte5 to distinguish if the packet is from Touchpad
829          * or Trackpoint.
830          * Touchpad:    0 - 0x7E
831          * Trackpoint:  0x7F
832          */
833         if (packet[5] == 0x7F) {
834                 /* It should be a DualPoint when received Trackpoint packet */
835                 if (!(priv->flags & ALPS_DUALPOINT)) {
836                         psmouse_warn(psmouse,
837                                      "Rejected trackstick packet from non DualPoint device");
838                         return;
839                 }
840
841                 /* Trackpoint packet */
842                 x = packet[1] | ((packet[3] & 0x20) << 2);
843                 y = packet[2] | ((packet[3] & 0x40) << 1);
844                 z = packet[4];
845                 left = packet[3] & 0x01;
846                 right = packet[3] & 0x02;
847                 middle = packet[3] & 0x04;
848
849                 /* To prevent the cursor jump when finger lifted */
850                 if (x == 0x7F && y == 0x7F && z == 0x7F)
851                         x = y = z = 0;
852
853                 /* Divide 4 since trackpoint's speed is too fast */
854                 input_report_rel(dev2, REL_X, (char)x / 4);
855                 input_report_rel(dev2, REL_Y, -((char)y / 4));
856
857                 input_report_key(dev2, BTN_LEFT, left);
858                 input_report_key(dev2, BTN_RIGHT, right);
859                 input_report_key(dev2, BTN_MIDDLE, middle);
860
861                 input_sync(dev2);
862                 return;
863         }
864
865         /* Touchpad packet */
866         x = packet[1] | ((packet[3] & 0x78) << 4);
867         y = packet[2] | ((packet[4] & 0x78) << 4);
868         z = packet[5];
869         left = packet[3] & 0x01;
870         right = packet[3] & 0x02;
871
872         if (z > 30)
873                 input_report_key(dev, BTN_TOUCH, 1);
874         if (z < 25)
875                 input_report_key(dev, BTN_TOUCH, 0);
876
877         if (z > 0) {
878                 input_report_abs(dev, ABS_X, x);
879                 input_report_abs(dev, ABS_Y, y);
880         }
881
882         input_report_abs(dev, ABS_PRESSURE, z);
883         input_report_key(dev, BTN_TOOL_FINGER, z > 0);
884
885         /* v6 touchpad does not have middle button */
886         input_report_key(dev, BTN_LEFT, left);
887         input_report_key(dev, BTN_RIGHT, right);
888
889         input_sync(dev);
890 }
891
892 static void alps_process_packet_v4(struct psmouse *psmouse)
893 {
894         struct alps_data *priv = psmouse->private;
895         unsigned char *packet = psmouse->packet;
896         struct alps_fields *f = &priv->f;
897         int offset;
898
899         /*
900          * v4 has a 6-byte encoding for bitmap data, but this data is
901          * broken up between 3 normal packets. Use priv->multi_packet to
902          * track our position in the bitmap packet.
903          */
904         if (packet[6] & 0x40) {
905                 /* sync, reset position */
906                 priv->multi_packet = 0;
907         }
908
909         if (WARN_ON_ONCE(priv->multi_packet > 2))
910                 return;
911
912         offset = 2 * priv->multi_packet;
913         priv->multi_data[offset] = packet[6];
914         priv->multi_data[offset + 1] = packet[7];
915
916         f->left = !!(packet[4] & 0x01);
917         f->right = !!(packet[4] & 0x02);
918
919         f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
920                   ((packet[0] & 0x30) >> 4);
921         f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
922         f->pressure = packet[5] & 0x7f;
923
924         if (++priv->multi_packet > 2) {
925                 priv->multi_packet = 0;
926
927                 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
928                            ((priv->multi_data[3] & 0x60) << 3) |
929                            ((priv->multi_data[0] & 0x3f) << 2) |
930                            ((priv->multi_data[1] & 0x60) >> 5);
931                 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
932                            ((priv->multi_data[3] & 0x1f) << 5) |
933                             (priv->multi_data[1] & 0x1f);
934
935                 f->fingers = alps_process_bitmap(priv, f);
936         }
937
938         alps_report_semi_mt_data(psmouse, f->fingers);
939 }
940
941 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
942 {
943         switch (psmouse->pktcnt) {
944         case 3:
945                 return (psmouse->packet[2] & 0x40) == 0x40;
946         case 4:
947                 return (psmouse->packet[3] & 0x48) == 0x48;
948         case 6:
949                 return (psmouse->packet[5] & 0x40) == 0x00;
950         }
951         return true;
952 }
953
954 static unsigned char alps_get_packet_id_v7(char *byte)
955 {
956         unsigned char packet_id;
957
958         if (byte[4] & 0x40)
959                 packet_id = V7_PACKET_ID_TWO;
960         else if (byte[4] & 0x01)
961                 packet_id = V7_PACKET_ID_MULTI;
962         else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
963                 packet_id = V7_PACKET_ID_NEW;
964         else if (byte[1] == 0x00 && byte[4] == 0x00)
965                 packet_id = V7_PACKET_ID_IDLE;
966         else
967                 packet_id = V7_PACKET_ID_UNKNOWN;
968
969         return packet_id;
970 }
971
972 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
973                                           unsigned char *pkt,
974                                           unsigned char pkt_id)
975 {
976         mt[0].x = ((pkt[2] & 0x80) << 4);
977         mt[0].x |= ((pkt[2] & 0x3F) << 5);
978         mt[0].x |= ((pkt[3] & 0x30) >> 1);
979         mt[0].x |= (pkt[3] & 0x07);
980         mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
981
982         mt[1].x = ((pkt[3] & 0x80) << 4);
983         mt[1].x |= ((pkt[4] & 0x80) << 3);
984         mt[1].x |= ((pkt[4] & 0x3F) << 4);
985         mt[1].y = ((pkt[5] & 0x80) << 3);
986         mt[1].y |= ((pkt[5] & 0x3F) << 4);
987
988         switch (pkt_id) {
989         case V7_PACKET_ID_TWO:
990                 mt[1].x &= ~0x000F;
991                 mt[1].y |= 0x000F;
992                 /* Detect false-postive touches where x & y report max value */
993                 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
994                         mt[1].x = 0;
995                         /* y gets set to 0 at the end of this function */
996                 }
997                 break;
998
999         case V7_PACKET_ID_MULTI:
1000                 mt[1].x &= ~0x003F;
1001                 mt[1].y &= ~0x0020;
1002                 mt[1].y |= ((pkt[4] & 0x02) << 4);
1003                 mt[1].y |= 0x001F;
1004                 break;
1005
1006         case V7_PACKET_ID_NEW:
1007                 mt[1].x &= ~0x003F;
1008                 mt[1].x |= (pkt[0] & 0x20);
1009                 mt[1].y |= 0x000F;
1010                 break;
1011         }
1012
1013         mt[0].y = 0x7FF - mt[0].y;
1014         mt[1].y = 0x7FF - mt[1].y;
1015 }
1016
1017 static int alps_get_mt_count(struct input_mt_pos *mt)
1018 {
1019         int i, fingers = 0;
1020
1021         for (i = 0; i < MAX_TOUCHES; i++) {
1022                 if (mt[i].x != 0 || mt[i].y != 0)
1023                         fingers++;
1024         }
1025
1026         return fingers;
1027 }
1028
1029 static int alps_decode_packet_v7(struct alps_fields *f,
1030                                   unsigned char *p,
1031                                   struct psmouse *psmouse)
1032 {
1033         struct alps_data *priv = psmouse->private;
1034         unsigned char pkt_id;
1035
1036         pkt_id = alps_get_packet_id_v7(p);
1037         if (pkt_id == V7_PACKET_ID_IDLE)
1038                 return 0;
1039         if (pkt_id == V7_PACKET_ID_UNKNOWN)
1040                 return -1;
1041         /*
1042          * NEW packets are send to indicate a discontinuity in the finger
1043          * coordinate reporting. Specifically a finger may have moved from
1044          * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1045          * us.
1046          *
1047          * NEW packets have 3 problems:
1048          * 1) They do not contain middle / right button info (on non clickpads)
1049          *    this can be worked around by preserving the old button state
1050          * 2) They do not contain an accurate fingercount, and they are
1051          *    typically send when the number of fingers changes. We cannot use
1052          *    the old finger count as that may mismatch with the amount of
1053          *    touch coordinates we've available in the NEW packet
1054          * 3) Their x data for the second touch is inaccurate leading to
1055          *    a possible jump of the x coordinate by 16 units when the first
1056          *    non NEW packet comes in
1057          * Since problems 2 & 3 cannot be worked around, just ignore them.
1058          */
1059         if (pkt_id == V7_PACKET_ID_NEW)
1060                 return 1;
1061
1062         alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1063
1064         if (pkt_id == V7_PACKET_ID_TWO)
1065                 f->fingers = alps_get_mt_count(f->mt);
1066         else /* pkt_id == V7_PACKET_ID_MULTI */
1067                 f->fingers = 3 + (p[5] & 0x03);
1068
1069         f->left = (p[0] & 0x80) >> 7;
1070         if (priv->flags & ALPS_BUTTONPAD) {
1071                 if (p[0] & 0x20)
1072                         f->fingers++;
1073                 if (p[0] & 0x10)
1074                         f->fingers++;
1075         } else {
1076                 f->right = (p[0] & 0x20) >> 5;
1077                 f->middle = (p[0] & 0x10) >> 4;
1078         }
1079
1080         /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1081         if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1082                 f->mt[0].x = f->mt[1].x;
1083                 f->mt[0].y = f->mt[1].y;
1084                 f->mt[1].x = 0;
1085                 f->mt[1].y = 0;
1086         }
1087
1088         return 0;
1089 }
1090
1091 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1092 {
1093         struct alps_data *priv = psmouse->private;
1094         unsigned char *packet = psmouse->packet;
1095         struct input_dev *dev2 = priv->dev2;
1096         int x, y, z, left, right, middle;
1097
1098         /* It should be a DualPoint when received trackstick packet */
1099         if (!(priv->flags & ALPS_DUALPOINT)) {
1100                 psmouse_warn(psmouse,
1101                              "Rejected trackstick packet from non DualPoint device");
1102                 return;
1103         }
1104
1105         x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1106         y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1107             ((packet[3] & 0x20) << 1);
1108         z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1109
1110         left = (packet[1] & 0x01);
1111         right = (packet[1] & 0x02) >> 1;
1112         middle = (packet[1] & 0x04) >> 2;
1113
1114         input_report_rel(dev2, REL_X, (char)x);
1115         input_report_rel(dev2, REL_Y, -((char)y));
1116
1117         input_report_key(dev2, BTN_LEFT, left);
1118         input_report_key(dev2, BTN_RIGHT, right);
1119         input_report_key(dev2, BTN_MIDDLE, middle);
1120
1121         input_sync(dev2);
1122 }
1123
1124 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1125 {
1126         struct alps_data *priv = psmouse->private;
1127         struct input_dev *dev = psmouse->dev;
1128         struct alps_fields *f = &priv->f;
1129
1130         memset(f, 0, sizeof(*f));
1131
1132         if (priv->decode_fields(f, psmouse->packet, psmouse))
1133                 return;
1134
1135         alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1136
1137         input_mt_report_finger_count(dev, f->fingers);
1138
1139         input_report_key(dev, BTN_LEFT, f->left);
1140         input_report_key(dev, BTN_RIGHT, f->right);
1141         input_report_key(dev, BTN_MIDDLE, f->middle);
1142
1143         input_sync(dev);
1144 }
1145
1146 static void alps_process_packet_v7(struct psmouse *psmouse)
1147 {
1148         unsigned char *packet = psmouse->packet;
1149
1150         if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1151                 alps_process_trackstick_packet_v7(psmouse);
1152         else
1153                 alps_process_touchpad_packet_v7(psmouse);
1154 }
1155
1156 static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)
1157 {
1158         enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;
1159
1160         switch (byte[3] & 0x30) {
1161         case 0x00:
1162                 if (SS4_IS_IDLE_V2(byte)) {
1163                         pkt_id = SS4_PACKET_ID_IDLE;
1164                 } else {
1165                         pkt_id = SS4_PACKET_ID_ONE;
1166                 }
1167                 break;
1168         case 0x10:
1169                 /* two-finger finger positions */
1170                 pkt_id = SS4_PACKET_ID_TWO;
1171                 break;
1172         case 0x20:
1173                 /* stick pointer */
1174                 pkt_id = SS4_PACKET_ID_STICK;
1175                 break;
1176         case 0x30:
1177                 /* third and fourth finger positions */
1178                 pkt_id = SS4_PACKET_ID_MULTI;
1179                 break;
1180         }
1181
1182         return pkt_id;
1183 }
1184
1185 static int alps_decode_ss4_v2(struct alps_fields *f,
1186                               unsigned char *p, struct psmouse *psmouse)
1187 {
1188         struct alps_data *priv = psmouse->private;
1189         enum SS4_PACKET_ID pkt_id;
1190         unsigned int no_data_x, no_data_y;
1191
1192         pkt_id = alps_get_pkt_id_ss4_v2(p);
1193
1194         /* Current packet is 1Finger coordinate packet */
1195         switch (pkt_id) {
1196         case SS4_PACKET_ID_ONE:
1197                 f->mt[0].x = SS4_1F_X_V2(p);
1198                 f->mt[0].y = SS4_1F_Y_V2(p);
1199                 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1200                 /*
1201                  * When a button is held the device will give us events
1202                  * with x, y, and pressure of 0. This causes annoying jumps
1203                  * if a touch is released while the button is held.
1204                  * Handle this by claiming zero contacts.
1205                  */
1206                 f->fingers = f->pressure > 0 ? 1 : 0;
1207                 f->first_mp = 0;
1208                 f->is_mp = 0;
1209                 break;
1210
1211         case SS4_PACKET_ID_TWO:
1212                 if (priv->flags & ALPS_BUTTONPAD) {
1213                         f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1214                         f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1215                         f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1216                         f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1217                 } else {
1218                         f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1219                         f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1220                         f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1221                         f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1222                 }
1223                 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1224
1225                 if (SS4_IS_MF_CONTINUE(p)) {
1226                         f->first_mp = 1;
1227                 } else {
1228                         f->fingers = 2;
1229                         f->first_mp = 0;
1230                 }
1231                 f->is_mp = 0;
1232
1233                 break;
1234
1235         case SS4_PACKET_ID_MULTI:
1236                 if (priv->flags & ALPS_BUTTONPAD) {
1237                         f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1238                         f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1239                         f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1240                         f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1241                         no_data_x = SS4_MFPACKET_NO_AX_BL;
1242                         no_data_y = SS4_MFPACKET_NO_AY_BL;
1243                 } else {
1244                         f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1245                         f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1246                         f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1247                         f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1248                         no_data_x = SS4_MFPACKET_NO_AX;
1249                         no_data_y = SS4_MFPACKET_NO_AY;
1250                 }
1251
1252                 f->first_mp = 0;
1253                 f->is_mp = 1;
1254
1255                 if (SS4_IS_5F_DETECTED(p)) {
1256                         f->fingers = 5;
1257                 } else if (f->mt[3].x == no_data_x &&
1258                              f->mt[3].y == no_data_y) {
1259                         f->mt[3].x = 0;
1260                         f->mt[3].y = 0;
1261                         f->fingers = 3;
1262                 } else {
1263                         f->fingers = 4;
1264                 }
1265                 break;
1266
1267         case SS4_PACKET_ID_STICK:
1268                 /*
1269                  * x, y, and pressure are decoded in
1270                  * alps_process_packet_ss4_v2()
1271                  */
1272                 f->first_mp = 0;
1273                 f->is_mp = 0;
1274                 break;
1275
1276         case SS4_PACKET_ID_IDLE:
1277         default:
1278                 memset(f, 0, sizeof(struct alps_fields));
1279                 break;
1280         }
1281
1282         /* handle buttons */
1283         if (pkt_id == SS4_PACKET_ID_STICK) {
1284                 f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1285                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1286                         f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1287                         f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1288                 }
1289         } else {
1290                 f->left = !!(SS4_BTN_V2(p) & 0x01);
1291                 if (!(priv->flags & ALPS_BUTTONPAD)) {
1292                         f->right = !!(SS4_BTN_V2(p) & 0x02);
1293                         f->middle = !!(SS4_BTN_V2(p) & 0x04);
1294                 }
1295         }
1296
1297         return 0;
1298 }
1299
1300 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1301 {
1302         struct alps_data *priv = psmouse->private;
1303         unsigned char *packet = psmouse->packet;
1304         struct input_dev *dev = psmouse->dev;
1305         struct input_dev *dev2 = priv->dev2;
1306         struct alps_fields *f = &priv->f;
1307
1308         memset(f, 0, sizeof(struct alps_fields));
1309         priv->decode_fields(f, packet, psmouse);
1310         if (priv->multi_packet) {
1311                 /*
1312                  * Sometimes the first packet will indicate a multi-packet
1313                  * sequence, but sometimes the next multi-packet would not
1314                  * come. Check for this, and when it happens process the
1315                  * position packet as usual.
1316                  */
1317                 if (f->is_mp) {
1318                         /* Now process the 1st packet */
1319                         priv->decode_fields(f, priv->multi_data, psmouse);
1320                 } else {
1321                         priv->multi_packet = 0;
1322                 }
1323         }
1324
1325         /*
1326          * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1327          * When it is set, it means 2nd packet comes without 1st packet come.
1328          */
1329         if (f->is_mp)
1330                 return;
1331
1332         /* Save the first packet */
1333         if (!priv->multi_packet && f->first_mp) {
1334                 priv->multi_packet = 1;
1335                 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1336                 return;
1337         }
1338
1339         priv->multi_packet = 0;
1340
1341         /* Report trackstick */
1342         if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
1343                 if (!(priv->flags & ALPS_DUALPOINT)) {
1344                         psmouse_warn(psmouse,
1345                                      "Rejected trackstick packet from non DualPoint device");
1346                         return;
1347                 }
1348
1349                 input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
1350                 input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
1351                 input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
1352
1353                 input_report_key(dev2, BTN_LEFT, f->ts_left);
1354                 input_report_key(dev2, BTN_RIGHT, f->ts_right);
1355                 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1356
1357                 input_sync(dev2);
1358                 return;
1359         }
1360
1361         /* Report touchpad */
1362         alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1363
1364         input_mt_report_finger_count(dev, f->fingers);
1365
1366         input_report_key(dev, BTN_LEFT, f->left);
1367         input_report_key(dev, BTN_RIGHT, f->right);
1368         input_report_key(dev, BTN_MIDDLE, f->middle);
1369
1370         input_report_abs(dev, ABS_PRESSURE, f->pressure);
1371         input_sync(dev);
1372 }
1373
1374 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1375 {
1376         if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1377                 return false;
1378         if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1379                 return false;
1380         return true;
1381 }
1382
1383 static DEFINE_MUTEX(alps_mutex);
1384
1385 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1386 {
1387         struct alps_data *priv =
1388                 container_of(work, struct alps_data, dev3_register_work.work);
1389         struct psmouse *psmouse = priv->psmouse;
1390         struct input_dev *dev3;
1391         int error = 0;
1392
1393         mutex_lock(&alps_mutex);
1394
1395         if (priv->dev3)
1396                 goto out;
1397
1398         dev3 = input_allocate_device();
1399         if (!dev3) {
1400                 psmouse_err(psmouse, "failed to allocate secondary device\n");
1401                 error = -ENOMEM;
1402                 goto out;
1403         }
1404
1405         snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1406                  psmouse->ps2dev.serio->phys,
1407                  (priv->dev2 ? "input2" : "input1"));
1408         dev3->phys = priv->phys3;
1409
1410         /*
1411          * format of input device name is: "protocol vendor name"
1412          * see function psmouse_switch_protocol() in psmouse-base.c
1413          */
1414         dev3->name = "PS/2 ALPS Mouse";
1415
1416         dev3->id.bustype = BUS_I8042;
1417         dev3->id.vendor  = 0x0002;
1418         dev3->id.product = PSMOUSE_PS2;
1419         dev3->id.version = 0x0000;
1420         dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1421
1422         input_set_capability(dev3, EV_REL, REL_X);
1423         input_set_capability(dev3, EV_REL, REL_Y);
1424         input_set_capability(dev3, EV_KEY, BTN_LEFT);
1425         input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1426         input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1427
1428         __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1429
1430         error = input_register_device(dev3);
1431         if (error) {
1432                 psmouse_err(psmouse,
1433                             "failed to register secondary device: %d\n",
1434                             error);
1435                 input_free_device(dev3);
1436                 goto out;
1437         }
1438
1439         priv->dev3 = dev3;
1440
1441 out:
1442         /*
1443          * Save the error code so that we can detect that we
1444          * already tried to create the device.
1445          */
1446         if (error)
1447                 priv->dev3 = ERR_PTR(error);
1448
1449         mutex_unlock(&alps_mutex);
1450 }
1451
1452 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1453                                         unsigned char packet[],
1454                                         bool report_buttons)
1455 {
1456         struct alps_data *priv = psmouse->private;
1457         struct input_dev *dev, *dev2 = NULL;
1458
1459         /* Figure out which device to use to report the bare packet */
1460         if (priv->proto_version == ALPS_PROTO_V2 &&
1461             (priv->flags & ALPS_DUALPOINT)) {
1462                 /* On V2 devices the DualPoint Stick reports bare packets */
1463                 dev = priv->dev2;
1464                 dev2 = psmouse->dev;
1465         } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1466                 /* Register dev3 mouse if we received PS/2 packet first time */
1467                 if (!IS_ERR(priv->dev3))
1468                         psmouse_queue_work(psmouse, &priv->dev3_register_work,
1469                                            0);
1470                 return;
1471         } else {
1472                 dev = priv->dev3;
1473         }
1474
1475         if (report_buttons)
1476                 alps_report_buttons(dev, dev2,
1477                                 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1478
1479         input_report_rel(dev, REL_X,
1480                 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1481         input_report_rel(dev, REL_Y,
1482                 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1483
1484         input_sync(dev);
1485 }
1486
1487 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1488 {
1489         struct alps_data *priv = psmouse->private;
1490
1491         if (psmouse->pktcnt < 6)
1492                 return PSMOUSE_GOOD_DATA;
1493
1494         if (psmouse->pktcnt == 6) {
1495                 /*
1496                  * Start a timer to flush the packet if it ends up last
1497                  * 6-byte packet in the stream. Timer needs to fire
1498                  * psmouse core times out itself. 20 ms should be enough
1499                  * to decide if we are getting more data or not.
1500                  */
1501                 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1502                 return PSMOUSE_GOOD_DATA;
1503         }
1504
1505         del_timer(&priv->timer);
1506
1507         if (psmouse->packet[6] & 0x80) {
1508
1509                 /*
1510                  * Highest bit is set - that means we either had
1511                  * complete ALPS packet and this is start of the
1512                  * next packet or we got garbage.
1513                  */
1514
1515                 if (((psmouse->packet[3] |
1516                       psmouse->packet[4] |
1517                       psmouse->packet[5]) & 0x80) ||
1518                     (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1519                         psmouse_dbg(psmouse,
1520                                     "refusing packet %4ph (suspected interleaved ps/2)\n",
1521                                     psmouse->packet + 3);
1522                         return PSMOUSE_BAD_DATA;
1523                 }
1524
1525                 priv->process_packet(psmouse);
1526
1527                 /* Continue with the next packet */
1528                 psmouse->packet[0] = psmouse->packet[6];
1529                 psmouse->pktcnt = 1;
1530
1531         } else {
1532
1533                 /*
1534                  * High bit is 0 - that means that we indeed got a PS/2
1535                  * packet in the middle of ALPS packet.
1536                  *
1537                  * There is also possibility that we got 6-byte ALPS
1538                  * packet followed  by 3-byte packet from trackpoint. We
1539                  * can not distinguish between these 2 scenarios but
1540                  * because the latter is unlikely to happen in course of
1541                  * normal operation (user would need to press all
1542                  * buttons on the pad and start moving trackpoint
1543                  * without touching the pad surface) we assume former.
1544                  * Even if we are wrong the wost thing that would happen
1545                  * the cursor would jump but we should not get protocol
1546                  * de-synchronization.
1547                  */
1548
1549                 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1550                                             false);
1551
1552                 /*
1553                  * Continue with the standard ALPS protocol handling,
1554                  * but make sure we won't process it as an interleaved
1555                  * packet again, which may happen if all buttons are
1556                  * pressed. To avoid this let's reset the 4th bit which
1557                  * is normally 1.
1558                  */
1559                 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1560                 psmouse->pktcnt = 4;
1561         }
1562
1563         return PSMOUSE_GOOD_DATA;
1564 }
1565
1566 static void alps_flush_packet(unsigned long data)
1567 {
1568         struct psmouse *psmouse = (struct psmouse *)data;
1569         struct alps_data *priv = psmouse->private;
1570
1571         serio_pause_rx(psmouse->ps2dev.serio);
1572
1573         if (psmouse->pktcnt == psmouse->pktsize) {
1574
1575                 /*
1576                  * We did not any more data in reasonable amount of time.
1577                  * Validate the last 3 bytes and process as a standard
1578                  * ALPS packet.
1579                  */
1580                 if ((psmouse->packet[3] |
1581                      psmouse->packet[4] |
1582                      psmouse->packet[5]) & 0x80) {
1583                         psmouse_dbg(psmouse,
1584                                     "refusing packet %3ph (suspected interleaved ps/2)\n",
1585                                     psmouse->packet + 3);
1586                 } else {
1587                         priv->process_packet(psmouse);
1588                 }
1589                 psmouse->pktcnt = 0;
1590         }
1591
1592         serio_continue_rx(psmouse->ps2dev.serio);
1593 }
1594
1595 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1596 {
1597         struct alps_data *priv = psmouse->private;
1598
1599         /*
1600          * Check if we are dealing with a bare PS/2 packet, presumably from
1601          * a device connected to the external PS/2 port. Because bare PS/2
1602          * protocol does not have enough constant bits to self-synchronize
1603          * properly we only do this if the device is fully synchronized.
1604          * Can not distinguish V8's first byte from PS/2 packet's
1605          */
1606         if (priv->proto_version != ALPS_PROTO_V8 &&
1607             !psmouse->out_of_sync_cnt &&
1608             (psmouse->packet[0] & 0xc8) == 0x08) {
1609
1610                 if (psmouse->pktcnt == 3) {
1611                         alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1612                                                     true);
1613                         return PSMOUSE_FULL_PACKET;
1614                 }
1615                 return PSMOUSE_GOOD_DATA;
1616         }
1617
1618         /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1619
1620         if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1621             psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1622                 return alps_handle_interleaved_ps2(psmouse);
1623         }
1624
1625         if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1626                 psmouse_dbg(psmouse,
1627                             "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1628                             psmouse->packet[0], priv->mask0, priv->byte0);
1629                 return PSMOUSE_BAD_DATA;
1630         }
1631
1632         /* Bytes 2 - pktsize should have 0 in the highest bit */
1633         if (priv->proto_version < ALPS_PROTO_V5 &&
1634             psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1635             (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1636                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1637                             psmouse->pktcnt - 1,
1638                             psmouse->packet[psmouse->pktcnt - 1]);
1639
1640                 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1641                     psmouse->pktcnt == psmouse->pktsize) {
1642                         /*
1643                          * Some Dell boxes, such as Latitude E6440 or E7440
1644                          * with closed lid, quite often smash last byte of
1645                          * otherwise valid packet with 0xff. Given that the
1646                          * next packet is very likely to be valid let's
1647                          * report PSMOUSE_FULL_PACKET but not process data,
1648                          * rather than reporting PSMOUSE_BAD_DATA and
1649                          * filling the logs.
1650                          */
1651                         return PSMOUSE_FULL_PACKET;
1652                 }
1653
1654                 return PSMOUSE_BAD_DATA;
1655         }
1656
1657         if ((priv->proto_version == ALPS_PROTO_V7 &&
1658                         !alps_is_valid_package_v7(psmouse)) ||
1659             (priv->proto_version == ALPS_PROTO_V8 &&
1660                         !alps_is_valid_package_ss4_v2(psmouse))) {
1661                 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1662                             psmouse->pktcnt - 1,
1663                             psmouse->packet[psmouse->pktcnt - 1]);
1664                 return PSMOUSE_BAD_DATA;
1665         }
1666
1667         if (psmouse->pktcnt == psmouse->pktsize) {
1668                 priv->process_packet(psmouse);
1669                 return PSMOUSE_FULL_PACKET;
1670         }
1671
1672         return PSMOUSE_GOOD_DATA;
1673 }
1674
1675 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1676 {
1677         struct ps2dev *ps2dev = &psmouse->ps2dev;
1678         struct alps_data *priv = psmouse->private;
1679         int command;
1680         unsigned char *param;
1681         unsigned char dummy[4];
1682
1683         BUG_ON(nibble > 0xf);
1684
1685         command = priv->nibble_commands[nibble].command;
1686         param = (command & 0x0f00) ?
1687                 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1688
1689         if (ps2_command(ps2dev, param, command))
1690                 return -1;
1691
1692         return 0;
1693 }
1694
1695 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1696 {
1697         struct ps2dev *ps2dev = &psmouse->ps2dev;
1698         struct alps_data *priv = psmouse->private;
1699         int i, nibble;
1700
1701         if (ps2_command(ps2dev, NULL, priv->addr_command))
1702                 return -1;
1703
1704         for (i = 12; i >= 0; i -= 4) {
1705                 nibble = (addr >> i) & 0xf;
1706                 if (alps_command_mode_send_nibble(psmouse, nibble))
1707                         return -1;
1708         }
1709
1710         return 0;
1711 }
1712
1713 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1714 {
1715         struct ps2dev *ps2dev = &psmouse->ps2dev;
1716         unsigned char param[4];
1717
1718         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1719                 return -1;
1720
1721         /*
1722          * The address being read is returned in the first two bytes
1723          * of the result. Check that this address matches the expected
1724          * address.
1725          */
1726         if (addr != ((param[0] << 8) | param[1]))
1727                 return -1;
1728
1729         return param[2];
1730 }
1731
1732 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1733 {
1734         if (alps_command_mode_set_addr(psmouse, addr))
1735                 return -1;
1736         return __alps_command_mode_read_reg(psmouse, addr);
1737 }
1738
1739 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1740 {
1741         if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1742                 return -1;
1743         if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1744                 return -1;
1745         return 0;
1746 }
1747
1748 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1749                                        u8 value)
1750 {
1751         if (alps_command_mode_set_addr(psmouse, addr))
1752                 return -1;
1753         return __alps_command_mode_write_reg(psmouse, value);
1754 }
1755
1756 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1757                         int repeated_command, unsigned char *param)
1758 {
1759         struct ps2dev *ps2dev = &psmouse->ps2dev;
1760
1761         param[0] = 0;
1762         if (init_command && ps2_command(ps2dev, param, init_command))
1763                 return -EIO;
1764
1765         if (ps2_command(ps2dev,  NULL, repeated_command) ||
1766             ps2_command(ps2dev,  NULL, repeated_command) ||
1767             ps2_command(ps2dev,  NULL, repeated_command))
1768                 return -EIO;
1769
1770         param[0] = param[1] = param[2] = 0xff;
1771         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1772                 return -EIO;
1773
1774         psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1775                     repeated_command, param);
1776         return 0;
1777 }
1778
1779 static bool alps_check_valid_firmware_id(unsigned char id[])
1780 {
1781         if (id[0] == 0x73)
1782                 return true;
1783
1784         if (id[0] == 0x88 &&
1785             (id[1] == 0x07 ||
1786              id[1] == 0x08 ||
1787              (id[1] & 0xf0) == 0xb0 ||
1788              (id[1] & 0xf0) == 0xc0)) {
1789                 return true;
1790         }
1791
1792         return false;
1793 }
1794
1795 static int alps_enter_command_mode(struct psmouse *psmouse)
1796 {
1797         unsigned char param[4];
1798
1799         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1800                 psmouse_err(psmouse, "failed to enter command mode\n");
1801                 return -1;
1802         }
1803
1804         if (!alps_check_valid_firmware_id(param)) {
1805                 psmouse_dbg(psmouse,
1806                             "unknown response while entering command mode\n");
1807                 return -1;
1808         }
1809         return 0;
1810 }
1811
1812 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1813 {
1814         struct ps2dev *ps2dev = &psmouse->ps2dev;
1815         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1816                 return -1;
1817         return 0;
1818 }
1819
1820 /*
1821  * For DualPoint devices select the device that should respond to
1822  * subsequent commands. It looks like glidepad is behind stickpointer,
1823  * I'd thought it would be other way around...
1824  */
1825 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1826 {
1827         struct ps2dev *ps2dev = &psmouse->ps2dev;
1828         int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1829
1830         if (ps2_command(ps2dev, NULL, cmd) ||
1831             ps2_command(ps2dev, NULL, cmd) ||
1832             ps2_command(ps2dev, NULL, cmd) ||
1833             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1834                 return -1;
1835
1836         /* we may get 3 more bytes, just ignore them */
1837         ps2_drain(ps2dev, 3, 100);
1838
1839         return 0;
1840 }
1841
1842 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1843 {
1844         struct ps2dev *ps2dev = &psmouse->ps2dev;
1845
1846         /* Try ALPS magic knock - 4 disable before enable */
1847         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1848             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1849             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1850             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1851             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1852                 return -1;
1853
1854         /*
1855          * Switch mouse to poll (remote) mode so motion data will not
1856          * get in our way
1857          */
1858         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1859 }
1860
1861 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1862 {
1863         int i, nibble;
1864
1865         /*
1866          * b0-b11 are valid bits, send sequence is inverse.
1867          * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1868          */
1869         for (i = 0; i <= 8; i += 4) {
1870                 nibble = (word >> i) & 0xf;
1871                 if (alps_command_mode_send_nibble(psmouse, nibble))
1872                         return -1;
1873         }
1874
1875         return 0;
1876 }
1877
1878 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1879                                        u16 addr, u16 value)
1880 {
1881         struct ps2dev *ps2dev = &psmouse->ps2dev;
1882
1883         /* 0x0A0 is the command to write the word */
1884         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1885             alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1886             alps_monitor_mode_send_word(psmouse, addr) ||
1887             alps_monitor_mode_send_word(psmouse, value) ||
1888             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1889                 return -1;
1890
1891         return 0;
1892 }
1893
1894 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1895 {
1896         struct ps2dev *ps2dev = &psmouse->ps2dev;
1897
1898         if (enable) {
1899                 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1900                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1901                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1902                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1903                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1904                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1905                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1906                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1907                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1908                         return -1;
1909         } else {
1910                 /* EC to exit monitor mode */
1911                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1912                         return -1;
1913         }
1914
1915         return 0;
1916 }
1917
1918 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1919 {
1920         u16 reg_val = 0x181;
1921         int ret = -1;
1922
1923         /* enter monitor mode, to write the register */
1924         if (alps_monitor_mode(psmouse, true))
1925                 return -1;
1926
1927         ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1928
1929         if (alps_monitor_mode(psmouse, false))
1930                 ret = -1;
1931
1932         return ret;
1933 }
1934
1935 static int alps_get_status(struct psmouse *psmouse, char *param)
1936 {
1937         /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1938         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1939                 return -1;
1940
1941         return 0;
1942 }
1943
1944 /*
1945  * Turn touchpad tapping on or off. The sequences are:
1946  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1947  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1948  * My guess that 0xE9 (GetInfo) is here as a sync point.
1949  * For models that also have stickpointer (DualPoints) its tapping
1950  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1951  * we don't fiddle with it.
1952  */
1953 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1954 {
1955         struct ps2dev *ps2dev = &psmouse->ps2dev;
1956         int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1957         unsigned char tap_arg = enable ? 0x0A : 0x00;
1958         unsigned char param[4];
1959
1960         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1961             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1962             ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1963             ps2_command(ps2dev, &tap_arg, cmd))
1964                 return -1;
1965
1966         if (alps_get_status(psmouse, param))
1967                 return -1;
1968
1969         return 0;
1970 }
1971
1972 /*
1973  * alps_poll() - poll the touchpad for current motion packet.
1974  * Used in resync.
1975  */
1976 static int alps_poll(struct psmouse *psmouse)
1977 {
1978         struct alps_data *priv = psmouse->private;
1979         unsigned char buf[sizeof(psmouse->packet)];
1980         bool poll_failed;
1981
1982         if (priv->flags & ALPS_PASS)
1983                 alps_passthrough_mode_v2(psmouse, true);
1984
1985         poll_failed = ps2_command(&psmouse->ps2dev, buf,
1986                                   PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1987
1988         if (priv->flags & ALPS_PASS)
1989                 alps_passthrough_mode_v2(psmouse, false);
1990
1991         if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1992                 return -1;
1993
1994         if ((psmouse->badbyte & 0xc8) == 0x08) {
1995 /*
1996  * Poll the track stick ...
1997  */
1998                 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1999                         return -1;
2000         }
2001
2002         memcpy(psmouse->packet, buf, sizeof(buf));
2003         return 0;
2004 }
2005
2006 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2007 {
2008         struct alps_data *priv = psmouse->private;
2009
2010         if ((priv->flags & ALPS_PASS) &&
2011             alps_passthrough_mode_v2(psmouse, true)) {
2012                 return -1;
2013         }
2014
2015         if (alps_tap_mode(psmouse, true)) {
2016                 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2017                 return -1;
2018         }
2019
2020         if (alps_absolute_mode_v1_v2(psmouse)) {
2021                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2022                 return -1;
2023         }
2024
2025         if ((priv->flags & ALPS_PASS) &&
2026             alps_passthrough_mode_v2(psmouse, false)) {
2027                 return -1;
2028         }
2029
2030         /* ALPS needs stream mode, otherwise it won't report any data */
2031         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2032                 psmouse_err(psmouse, "Failed to enable stream mode\n");
2033                 return -1;
2034         }
2035
2036         return 0;
2037 }
2038
2039 static int alps_hw_init_v6(struct psmouse *psmouse)
2040 {
2041         unsigned char param[2] = {0xC8, 0x14};
2042
2043         /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2044         if (alps_passthrough_mode_v2(psmouse, true))
2045                 return -1;
2046
2047         if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2048             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2049             ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2050             ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2051             ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2052                 return -1;
2053
2054         if (alps_passthrough_mode_v2(psmouse, false))
2055                 return -1;
2056
2057         if (alps_absolute_mode_v6(psmouse)) {
2058                 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2059                 return -1;
2060         }
2061
2062         return 0;
2063 }
2064
2065 /*
2066  * Enable or disable passthrough mode to the trackstick.
2067  */
2068 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2069                                     int reg_base, bool enable)
2070 {
2071         int reg_val, ret = -1;
2072
2073         if (alps_enter_command_mode(psmouse))
2074                 return -1;
2075
2076         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2077         if (reg_val == -1)
2078                 goto error;
2079
2080         if (enable)
2081                 reg_val |= 0x01;
2082         else
2083                 reg_val &= ~0x01;
2084
2085         ret = __alps_command_mode_write_reg(psmouse, reg_val);
2086
2087 error:
2088         if (alps_exit_command_mode(psmouse))
2089                 ret = -1;
2090         return ret;
2091 }
2092
2093 /* Must be in command mode when calling this function */
2094 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2095 {
2096         int reg_val;
2097
2098         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2099         if (reg_val == -1)
2100                 return -1;
2101
2102         reg_val |= 0x06;
2103         if (__alps_command_mode_write_reg(psmouse, reg_val))
2104                 return -1;
2105
2106         return 0;
2107 }
2108
2109 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2110 {
2111         int ret = -EIO, reg_val;
2112
2113         if (alps_enter_command_mode(psmouse))
2114                 goto error;
2115
2116         reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2117         if (reg_val == -1)
2118                 goto error;
2119
2120         /* bit 7: trackstick is present */
2121         ret = reg_val & 0x80 ? 0 : -ENODEV;
2122
2123 error:
2124         alps_exit_command_mode(psmouse);
2125         return ret;
2126 }
2127
2128 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2129 {
2130         struct ps2dev *ps2dev = &psmouse->ps2dev;
2131         int ret = 0;
2132         unsigned char param[4];
2133
2134         if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2135                 return -EIO;
2136
2137         /*
2138          * E7 report for the trackstick
2139          *
2140          * There have been reports of failures to seem to trace back
2141          * to the above trackstick check failing. When these occur
2142          * this E7 report fails, so when that happens we continue
2143          * with the assumption that there isn't a trackstick after
2144          * all.
2145          */
2146         if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2147                 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2148                 ret = -ENODEV;
2149         } else {
2150                 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2151
2152                 /*
2153                  * Not sure what this does, but it is absolutely
2154                  * essential. Without it, the touchpad does not
2155                  * work at all and the trackstick just emits normal
2156                  * PS/2 packets.
2157                  */
2158                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2159                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2160                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2161                     alps_command_mode_send_nibble(psmouse, 0x9) ||
2162                     alps_command_mode_send_nibble(psmouse, 0x4)) {
2163                         psmouse_err(psmouse,
2164                                     "Error sending magic E6 sequence\n");
2165                         ret = -EIO;
2166                         goto error;
2167                 }
2168
2169                 /*
2170                  * This ensures the trackstick packets are in the format
2171                  * supported by this driver. If bit 1 isn't set the packet
2172                  * format is different.
2173                  */
2174                 if (alps_enter_command_mode(psmouse) ||
2175                     alps_command_mode_write_reg(psmouse,
2176                                                 reg_base + 0x08, 0x82) ||
2177                     alps_exit_command_mode(psmouse))
2178                         ret = -EIO;
2179         }
2180
2181 error:
2182         if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2183                 ret = -EIO;
2184
2185         return ret;
2186 }
2187
2188 static int alps_hw_init_v3(struct psmouse *psmouse)
2189 {
2190         struct alps_data *priv = psmouse->private;
2191         struct ps2dev *ps2dev = &psmouse->ps2dev;
2192         int reg_val;
2193         unsigned char param[4];
2194
2195         if ((priv->flags & ALPS_DUALPOINT) &&
2196             alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2197                 goto error;
2198
2199         if (alps_enter_command_mode(psmouse) ||
2200             alps_absolute_mode_v3(psmouse)) {
2201                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2202                 goto error;
2203         }
2204
2205         reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2206         if (reg_val == -1)
2207                 goto error;
2208         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2209                 goto error;
2210
2211         reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2212         if (reg_val == -1)
2213                 goto error;
2214         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2215                 goto error;
2216
2217         if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2218                 goto error;
2219         if (__alps_command_mode_write_reg(psmouse, 0x04))
2220                 goto error;
2221
2222         if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2223                 goto error;
2224         if (__alps_command_mode_write_reg(psmouse, 0x03))
2225                 goto error;
2226
2227         if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2228                 goto error;
2229         if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2230                 goto error;
2231
2232         if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2233                 goto error;
2234         if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2235                 goto error;
2236
2237         alps_exit_command_mode(psmouse);
2238
2239         /* Set rate and enable data reporting */
2240         param[0] = 0x64;
2241         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2242             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2243                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2244                 return -1;
2245         }
2246
2247         return 0;
2248
2249 error:
2250         /*
2251          * Leaving the touchpad in command mode will essentially render
2252          * it unusable until the machine reboots, so exit it here just
2253          * to be safe
2254          */
2255         alps_exit_command_mode(psmouse);
2256         return -1;
2257 }
2258
2259 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2260 {
2261         int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2262         struct alps_data *priv = psmouse->private;
2263
2264         reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2265         if (reg < 0)
2266                 return reg;
2267
2268         x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2269         x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2270
2271         y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2272         y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2273
2274         reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2275         if (reg < 0)
2276                 return reg;
2277
2278         x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2279         x_electrode = 17 + x_electrode;
2280
2281         y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2282         y_electrode = 13 + y_electrode;
2283
2284         x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2285         y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2286
2287         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2288         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2289
2290         psmouse_dbg(psmouse,
2291                     "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2292                     x_pitch, y_pitch, x_electrode, y_electrode,
2293                     x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2294
2295         return 0;
2296 }
2297
2298 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2299 {
2300         struct alps_data *priv = psmouse->private;
2301         struct ps2dev *ps2dev = &psmouse->ps2dev;
2302         int reg_val, ret = -1;
2303
2304         if (priv->flags & ALPS_DUALPOINT) {
2305                 reg_val = alps_setup_trackstick_v3(psmouse,
2306                                                    ALPS_REG_BASE_RUSHMORE);
2307                 if (reg_val == -EIO)
2308                         goto error;
2309         }
2310
2311         if (alps_enter_command_mode(psmouse) ||
2312             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2313             alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2314                 goto error;
2315
2316         if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2317                 goto error;
2318
2319         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2320         if (reg_val == -1)
2321                 goto error;
2322         if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2323                 goto error;
2324
2325         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2326                 goto error;
2327
2328         /* enter absolute mode */
2329         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2330         if (reg_val == -1)
2331                 goto error;
2332         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2333                 goto error;
2334
2335         alps_exit_command_mode(psmouse);
2336         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2337
2338 error:
2339         alps_exit_command_mode(psmouse);
2340         return ret;
2341 }
2342
2343 /* Must be in command mode when calling this function */
2344 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2345 {
2346         int reg_val;
2347
2348         reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2349         if (reg_val == -1)
2350                 return -1;
2351
2352         reg_val |= 0x02;
2353         if (__alps_command_mode_write_reg(psmouse, reg_val))
2354                 return -1;
2355
2356         return 0;
2357 }
2358
2359 static int alps_hw_init_v4(struct psmouse *psmouse)
2360 {
2361         struct ps2dev *ps2dev = &psmouse->ps2dev;
2362         unsigned char param[4];
2363
2364         if (alps_enter_command_mode(psmouse))
2365                 goto error;
2366
2367         if (alps_absolute_mode_v4(psmouse)) {
2368                 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2369                 goto error;
2370         }
2371
2372         if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2373                 goto error;
2374
2375         if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2376                 goto error;
2377
2378         if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2379                 goto error;
2380
2381         if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2382                 goto error;
2383
2384         if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2385                 goto error;
2386
2387         if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2388                 goto error;
2389
2390         if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2391                 goto error;
2392
2393         if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2394                 goto error;
2395
2396         alps_exit_command_mode(psmouse);
2397
2398         /*
2399          * This sequence changes the output from a 9-byte to an
2400          * 8-byte format. All the same data seems to be present,
2401          * just in a more compact format.
2402          */
2403         param[0] = 0xc8;
2404         param[1] = 0x64;
2405         param[2] = 0x50;
2406         if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2407             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2408             ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2409             ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2410                 return -1;
2411
2412         /* Set rate and enable data reporting */
2413         param[0] = 0x64;
2414         if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2415             ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2416                 psmouse_err(psmouse, "Failed to enable data reporting\n");
2417                 return -1;
2418         }
2419
2420         return 0;
2421
2422 error:
2423         /*
2424          * Leaving the touchpad in command mode will essentially render
2425          * it unusable until the machine reboots, so exit it here just
2426          * to be safe
2427          */
2428         alps_exit_command_mode(psmouse);
2429         return -1;
2430 }
2431
2432 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2433                                       unsigned char index, unsigned char otp[])
2434 {
2435         struct ps2dev *ps2dev = &psmouse->ps2dev;
2436
2437         switch (index) {
2438         case 0:
2439                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2440                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)  ||
2441                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2442                         return -1;
2443
2444                 break;
2445
2446         case 1:
2447                 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2448                     ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL)  ||
2449                     ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2450                         return -1;
2451
2452                 break;
2453         }
2454
2455         return 0;
2456 }
2457
2458 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2459                                           struct alps_data *priv)
2460 {
2461         int num_x_electrode;
2462         int num_y_electrode;
2463         int x_pitch, y_pitch, x_phys, y_phys;
2464
2465         num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2466         num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2467
2468         priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2469         priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2470
2471         x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2472         y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2473
2474         x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2475         y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2476
2477         priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2478         priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2479
2480         return 0;
2481 }
2482
2483 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2484                                        struct alps_data *priv)
2485 {
2486         unsigned char is_btnless;
2487
2488         is_btnless = (otp[1][1] >> 3) & 0x01;
2489
2490         if (is_btnless)
2491                 priv->flags |= ALPS_BUTTONPAD;
2492
2493         return 0;
2494 }
2495
2496 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2497                                     struct alps_data *priv)
2498 {
2499         unsigned char otp[2][4];
2500
2501         memset(otp, 0, sizeof(otp));
2502
2503         if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2504             alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2505                 return -1;
2506
2507         alps_update_device_area_ss4_v2(otp, priv);
2508
2509         alps_update_btn_info_ss4_v2(otp, priv);
2510
2511         return 0;
2512 }
2513
2514 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2515                                         struct alps_data *priv)
2516 {
2517         struct ps2dev *ps2dev = &psmouse->ps2dev;
2518         unsigned char param[4] = {0};
2519         int num_x_electrode, num_y_electrode;
2520
2521         if (alps_enter_command_mode(psmouse))
2522                 return -1;
2523
2524         param[0] = 0x0a;
2525         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2526             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2527             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2528             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2529             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2530                 return -1;
2531
2532         if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2533                 return -1;
2534
2535         /*
2536          * Dolphin's sensor line number is not fixed. It can be calculated
2537          * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2538          * Further more, we can get device's x_max and y_max by multiplying
2539          * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2540          *
2541          * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2542          *      real sensor line number X = 11 + 8 = 19, and
2543          *      real sensor line number Y = 8 + 1 = 9.
2544          *      So, x_max = (19 - 1) * 64 = 1152, and
2545          *          y_max = (9 - 1) * 64 = 512.
2546          */
2547         num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2548         num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2549         priv->x_bits = num_x_electrode;
2550         priv->y_bits = num_y_electrode;
2551         priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2552         priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2553
2554         if (alps_exit_command_mode(psmouse))
2555                 return -1;
2556
2557         return 0;
2558 }
2559
2560 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2561 {
2562         struct ps2dev *ps2dev = &psmouse->ps2dev;
2563         unsigned char param[2];
2564
2565         /* This is dolphin "v1" as empirically defined by florin9doi */
2566         param[0] = 0x64;
2567         param[1] = 0x28;
2568
2569         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2570             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2571             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2572                 return -1;
2573
2574         return 0;
2575 }
2576
2577 static int alps_hw_init_v7(struct psmouse *psmouse)
2578 {
2579         struct ps2dev *ps2dev = &psmouse->ps2dev;
2580         int reg_val, ret = -1;
2581
2582         if (alps_enter_command_mode(psmouse) ||
2583             alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2584                 goto error;
2585
2586         if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2587                 goto error;
2588
2589         if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2590                 goto error;
2591
2592         reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2593         if (reg_val == -1)
2594                 goto error;
2595         if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2596                 goto error;
2597
2598         alps_exit_command_mode(psmouse);
2599         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2600
2601 error:
2602         alps_exit_command_mode(psmouse);
2603         return ret;
2604 }
2605
2606 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2607 {
2608         struct ps2dev *ps2dev = &psmouse->ps2dev;
2609         char param[2] = {0x64, 0x28};
2610         int ret = -1;
2611
2612         /* enter absolute mode */
2613         if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2614             ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2615             ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2616             ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2617                 goto error;
2618         }
2619
2620         /* T.B.D. Decread noise packet number, delete in the future */
2621         if (alps_exit_command_mode(psmouse) ||
2622             alps_enter_command_mode(psmouse) ||
2623             alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2624                 goto error;
2625         }
2626         alps_exit_command_mode(psmouse);
2627
2628         return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2629
2630 error:
2631         alps_exit_command_mode(psmouse);
2632         return ret;
2633 }
2634
2635 static int alps_set_protocol(struct psmouse *psmouse,
2636                              struct alps_data *priv,
2637                              const struct alps_protocol_info *protocol)
2638 {
2639         psmouse->private = priv;
2640
2641         setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2642
2643         priv->proto_version = protocol->version;
2644         priv->byte0 = protocol->byte0;
2645         priv->mask0 = protocol->mask0;
2646         priv->flags = protocol->flags;
2647
2648         priv->x_max = 2000;
2649         priv->y_max = 1400;
2650         priv->x_bits = 15;
2651         priv->y_bits = 11;
2652
2653         switch (priv->proto_version) {
2654         case ALPS_PROTO_V1:
2655         case ALPS_PROTO_V2:
2656                 priv->hw_init = alps_hw_init_v1_v2;
2657                 priv->process_packet = alps_process_packet_v1_v2;
2658                 priv->set_abs_params = alps_set_abs_params_st;
2659                 priv->x_max = 1023;
2660                 priv->y_max = 767;
2661                 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2662                         priv->flags |= ALPS_STICK_BITS;
2663                 break;
2664
2665         case ALPS_PROTO_V3:
2666                 priv->hw_init = alps_hw_init_v3;
2667                 priv->process_packet = alps_process_packet_v3;
2668                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2669                 priv->decode_fields = alps_decode_pinnacle;
2670                 priv->nibble_commands = alps_v3_nibble_commands;
2671                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2672
2673                 if (alps_probe_trackstick_v3_v7(psmouse,
2674                                                 ALPS_REG_BASE_PINNACLE) < 0)
2675                         priv->flags &= ~ALPS_DUALPOINT;
2676
2677                 break;
2678
2679         case ALPS_PROTO_V3_RUSHMORE:
2680                 priv->hw_init = alps_hw_init_rushmore_v3;
2681                 priv->process_packet = alps_process_packet_v3;
2682                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2683                 priv->decode_fields = alps_decode_rushmore;
2684                 priv->nibble_commands = alps_v3_nibble_commands;
2685                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2686                 priv->x_bits = 16;
2687                 priv->y_bits = 12;
2688
2689                 if (alps_probe_trackstick_v3_v7(psmouse,
2690                                                 ALPS_REG_BASE_RUSHMORE) < 0)
2691                         priv->flags &= ~ALPS_DUALPOINT;
2692
2693                 break;
2694
2695         case ALPS_PROTO_V4:
2696                 priv->hw_init = alps_hw_init_v4;
2697                 priv->process_packet = alps_process_packet_v4;
2698                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2699                 priv->nibble_commands = alps_v4_nibble_commands;
2700                 priv->addr_command = PSMOUSE_CMD_DISABLE;
2701                 break;
2702
2703         case ALPS_PROTO_V5:
2704                 priv->hw_init = alps_hw_init_dolphin_v1;
2705                 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2706                 priv->decode_fields = alps_decode_dolphin;
2707                 priv->set_abs_params = alps_set_abs_params_semi_mt;
2708                 priv->nibble_commands = alps_v3_nibble_commands;
2709                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2710                 priv->x_bits = 23;
2711                 priv->y_bits = 12;
2712
2713                 if (alps_dolphin_get_device_area(psmouse, priv))
2714                         return -EIO;
2715
2716                 break;
2717
2718         case ALPS_PROTO_V6:
2719                 priv->hw_init = alps_hw_init_v6;
2720                 priv->process_packet = alps_process_packet_v6;
2721                 priv->set_abs_params = alps_set_abs_params_st;
2722                 priv->nibble_commands = alps_v6_nibble_commands;
2723                 priv->x_max = 2047;
2724                 priv->y_max = 1535;
2725                 break;
2726
2727         case ALPS_PROTO_V7:
2728                 priv->hw_init = alps_hw_init_v7;
2729                 priv->process_packet = alps_process_packet_v7;
2730                 priv->decode_fields = alps_decode_packet_v7;
2731                 priv->set_abs_params = alps_set_abs_params_v7;
2732                 priv->nibble_commands = alps_v3_nibble_commands;
2733                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2734                 priv->x_max = 0xfff;
2735                 priv->y_max = 0x7ff;
2736
2737                 if (priv->fw_ver[1] != 0xba)
2738                         priv->flags |= ALPS_BUTTONPAD;
2739
2740                 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2741                         priv->flags &= ~ALPS_DUALPOINT;
2742
2743                 break;
2744
2745         case ALPS_PROTO_V8:
2746                 priv->hw_init = alps_hw_init_ss4_v2;
2747                 priv->process_packet = alps_process_packet_ss4_v2;
2748                 priv->decode_fields = alps_decode_ss4_v2;
2749                 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2750                 priv->nibble_commands = alps_v3_nibble_commands;
2751                 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2752
2753                 if (alps_set_defaults_ss4_v2(psmouse, priv))
2754                         return -EIO;
2755
2756                 if (priv->fw_ver[1] == 0x1)
2757                         priv->flags |= ALPS_DUALPOINT |
2758                                         ALPS_DUALPOINT_WITH_PRESSURE;
2759
2760                 break;
2761         }
2762
2763         return 0;
2764 }
2765
2766 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2767                                                          unsigned char *ec)
2768 {
2769         const struct alps_model_info *model;
2770         int i;
2771
2772         for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2773                 model = &alps_model_data[i];
2774
2775                 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2776                     (!model->command_mode_resp ||
2777                      model->command_mode_resp == ec[2])) {
2778
2779                         return &model->protocol_info;
2780                 }
2781         }
2782
2783         return NULL;
2784 }
2785
2786 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2787 {
2788         const struct alps_protocol_info *protocol;
2789         unsigned char e6[4], e7[4], ec[4];
2790         int error;
2791
2792         /*
2793          * First try "E6 report".
2794          * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2795          * The bits 0-2 of the first byte will be 1s if some buttons are
2796          * pressed.
2797          */
2798         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2799                          PSMOUSE_CMD_SETSCALE11, e6))
2800                 return -EIO;
2801
2802         if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2803                 return -EINVAL;
2804
2805         /*
2806          * Now get the "E7" and "EC" reports.  These will uniquely identify
2807          * most ALPS touchpads.
2808          */
2809         if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2810                          PSMOUSE_CMD_SETSCALE21, e7) ||
2811             alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2812                          PSMOUSE_CMD_RESET_WRAP, ec) ||
2813             alps_exit_command_mode(psmouse))
2814                 return -EIO;
2815
2816         protocol = alps_match_table(e7, ec);
2817         if (!protocol) {
2818                 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2819                            ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2820                         protocol = &alps_v5_protocol_data;
2821                 } else if (ec[0] == 0x88 &&
2822                            ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2823                         protocol = &alps_v7_protocol_data;
2824                 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2825                         protocol = &alps_v3_rushmore_data;
2826                 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2827                            ec[2] >= 0x90 && ec[2] <= 0x9d) {
2828                         protocol = &alps_v3_protocol_data;
2829                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2830                            e7[2] == 0x14 && ec[1] == 0x02) {
2831                         protocol = &alps_v8_protocol_data;
2832                 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2833                            e7[2] == 0x28 && ec[1] == 0x01) {
2834                         protocol = &alps_v8_protocol_data;
2835                 } else {
2836                         psmouse_dbg(psmouse,
2837                                     "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2838                         return -EINVAL;
2839                 }
2840         }
2841
2842         if (priv) {
2843                 /* Save the Firmware version */
2844                 memcpy(priv->fw_ver, ec, 3);
2845                 error = alps_set_protocol(psmouse, priv, protocol);
2846                 if (error)
2847                         return error;
2848         }
2849
2850         return 0;
2851 }
2852
2853 static int alps_reconnect(struct psmouse *psmouse)
2854 {
2855         struct alps_data *priv = psmouse->private;
2856
2857         psmouse_reset(psmouse);
2858
2859         if (alps_identify(psmouse, priv) < 0)
2860                 return -1;
2861
2862         return priv->hw_init(psmouse);
2863 }
2864
2865 static void alps_disconnect(struct psmouse *psmouse)
2866 {
2867         struct alps_data *priv = psmouse->private;
2868
2869         psmouse_reset(psmouse);
2870         del_timer_sync(&priv->timer);
2871         if (priv->dev2)
2872                 input_unregister_device(priv->dev2);
2873         if (!IS_ERR_OR_NULL(priv->dev3))
2874                 input_unregister_device(priv->dev3);
2875         kfree(priv);
2876 }
2877
2878 static void alps_set_abs_params_st(struct alps_data *priv,
2879                                    struct input_dev *dev1)
2880 {
2881         input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2882         input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2883         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2884 }
2885
2886 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2887                                           struct input_dev *dev1)
2888 {
2889         input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2890         input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2891
2892         input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2893         input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2894
2895         set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2896         set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2897 }
2898
2899 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
2900                                         struct input_dev *dev1)
2901 {
2902         alps_set_abs_params_mt_common(priv, dev1);
2903         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2904
2905         input_mt_init_slots(dev1, MAX_TOUCHES,
2906                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2907                                 INPUT_MT_SEMI_MT);
2908 }
2909
2910 static void alps_set_abs_params_v7(struct alps_data *priv,
2911                                    struct input_dev *dev1)
2912 {
2913         alps_set_abs_params_mt_common(priv, dev1);
2914         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2915
2916         input_mt_init_slots(dev1, MAX_TOUCHES,
2917                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2918                                 INPUT_MT_TRACK);
2919
2920         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2921 }
2922
2923 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2924                                        struct input_dev *dev1)
2925 {
2926         alps_set_abs_params_mt_common(priv, dev1);
2927         input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2928         set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2929
2930         input_mt_init_slots(dev1, MAX_TOUCHES,
2931                             INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2932                                 INPUT_MT_TRACK);
2933 }
2934
2935 int alps_init(struct psmouse *psmouse)
2936 {
2937         struct alps_data *priv = psmouse->private;
2938         struct input_dev *dev1 = psmouse->dev;
2939         int error;
2940
2941         error = priv->hw_init(psmouse);
2942         if (error)
2943                 goto init_fail;
2944
2945         /*
2946          * Undo part of setup done for us by psmouse core since touchpad
2947          * is not a relative device.
2948          */
2949         __clear_bit(EV_REL, dev1->evbit);
2950         __clear_bit(REL_X, dev1->relbit);
2951         __clear_bit(REL_Y, dev1->relbit);
2952
2953         /*
2954          * Now set up our capabilities.
2955          */
2956         dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2957         dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2958         dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2959         dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2960                 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2961
2962         dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2963
2964         priv->set_abs_params(priv, dev1);
2965
2966         if (priv->flags & ALPS_WHEEL) {
2967                 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2968                 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2969         }
2970
2971         if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2972                 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2973                 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2974         }
2975
2976         if (priv->flags & ALPS_FOUR_BUTTONS) {
2977                 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2978                 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2979                 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2980                 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2981         } else if (priv->flags & ALPS_BUTTONPAD) {
2982                 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2983                 clear_bit(BTN_RIGHT, dev1->keybit);
2984         } else {
2985                 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2986         }
2987
2988         if (priv->flags & ALPS_DUALPOINT) {
2989                 struct input_dev *dev2;
2990
2991                 dev2 = input_allocate_device();
2992                 if (!dev2) {
2993                         psmouse_err(psmouse,
2994                                     "failed to allocate trackstick device\n");
2995                         error = -ENOMEM;
2996                         goto init_fail;
2997                 }
2998
2999                 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3000                          psmouse->ps2dev.serio->phys);
3001                 dev2->phys = priv->phys2;
3002
3003                 /*
3004                  * format of input device name is: "protocol vendor name"
3005                  * see function psmouse_switch_protocol() in psmouse-base.c
3006                  */
3007                 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3008
3009                 dev2->id.bustype = BUS_I8042;
3010                 dev2->id.vendor  = 0x0002;
3011                 dev2->id.product = PSMOUSE_ALPS;
3012                 dev2->id.version = priv->proto_version;
3013                 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3014
3015                 input_set_capability(dev2, EV_REL, REL_X);
3016                 input_set_capability(dev2, EV_REL, REL_Y);
3017                 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3018                         input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3019                         input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3020                 }
3021                 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3022                 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3023                 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3024
3025                 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3026                 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3027
3028                 error = input_register_device(dev2);
3029                 if (error) {
3030                         psmouse_err(psmouse,
3031                                     "failed to register trackstick device: %d\n",
3032                                     error);
3033                         input_free_device(dev2);
3034                         goto init_fail;
3035                 }
3036
3037                 priv->dev2 = dev2;
3038         }
3039
3040         priv->psmouse = psmouse;
3041
3042         INIT_DELAYED_WORK(&priv->dev3_register_work,
3043                           alps_register_bare_ps2_mouse);
3044
3045         psmouse->protocol_handler = alps_process_byte;
3046         psmouse->poll = alps_poll;
3047         psmouse->disconnect = alps_disconnect;
3048         psmouse->reconnect = alps_reconnect;
3049         psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3050
3051         /* We are having trouble resyncing ALPS touchpads so disable it for now */
3052         psmouse->resync_time = 0;
3053
3054         /* Allow 2 invalid packets without resetting device */
3055         psmouse->resetafter = psmouse->pktsize * 2;
3056
3057         return 0;
3058
3059 init_fail:
3060         psmouse_reset(psmouse);
3061         /*
3062          * Even though we did not allocate psmouse->private we do free
3063          * it here.
3064          */
3065         kfree(psmouse->private);
3066         psmouse->private = NULL;
3067         return error;
3068 }
3069
3070 int alps_detect(struct psmouse *psmouse, bool set_properties)
3071 {
3072         struct alps_data *priv;
3073         int error;
3074
3075         error = alps_identify(psmouse, NULL);
3076         if (error)
3077                 return error;
3078
3079         /*
3080          * Reset the device to make sure it is fully operational:
3081          * on some laptops, like certain Dell Latitudes, we may
3082          * fail to properly detect presence of trackstick if device
3083          * has not been reset.
3084          */
3085         psmouse_reset(psmouse);
3086
3087         priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3088         if (!priv)
3089                 return -ENOMEM;
3090
3091         error = alps_identify(psmouse, priv);
3092         if (error) {
3093                 kfree(priv);
3094                 return error;
3095         }
3096
3097         if (set_properties) {
3098                 psmouse->vendor = "ALPS";
3099                 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3100                                 "DualPoint TouchPad" : "GlidePoint";
3101                 psmouse->model = priv->proto_version;
3102         } else {
3103                 /*
3104                  * Destroy alps_data structure we allocated earlier since
3105                  * this was just a "trial run". Otherwise we'll keep it
3106                  * to be used by alps_init() which has to be called if
3107                  * we succeed and set_properties is true.
3108                  */
3109                 kfree(priv);
3110                 psmouse->private = NULL;
3111         }
3112
3113         return 0;
3114 }
3115