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