]> git.proxmox.com Git - mirror_ubuntu-focal-kernel.git/blob - drivers/input/mouse/alps.c
projects / mirror_ubuntu-focal-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
power_supply: Correct kerneldoc copy paste errors
[mirror_ubuntu-focal-kernel.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_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 /*
314 * Process bitmap data for V5 protocols. Return value is null.
315 *
316 * The bitmaps don't have enough data to track fingers, so this function
317 * only generates points representing a bounding box of at most two contacts.
318 * These two points are returned in fields->mt.
319 */
320 static void alps_process_bitmap_dolphin(struct alps_data *priv,
321 struct alps_fields *fields)
322 {
323 int box_middle_x, box_middle_y;
324 unsigned int x_map, y_map;
325 unsigned char start_bit, end_bit;
326 unsigned char x_msb, x_lsb, y_msb, y_lsb;
327
328 x_map = fields->x_map;
329 y_map = fields->y_map;
330
331 if (!x_map || !y_map)
332 return;
333
334 /* Get Most-significant and Least-significant bit */
335 x_msb = fls(x_map);
336 x_lsb = ffs(x_map);
337 y_msb = fls(y_map);
338 y_lsb = ffs(y_map);
339
340 /* Most-significant bit should never exceed max sensor line number */
341 if (x_msb > priv->x_bits || y_msb > priv->y_bits)
342 return;
343
344 if (fields->fingers > 1) {
345 start_bit = priv->x_bits - x_msb;
346 end_bit = priv->x_bits - x_lsb;
347 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
348 (2 * (priv->x_bits - 1));
349
350 start_bit = y_lsb - 1;
351 end_bit = y_msb - 1;
352 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
353 (2 * (priv->y_bits - 1));
354 fields->mt[0] = fields->st;
355 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
356 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
357 }
358 }
359
360 static void alps_get_bitmap_points(unsigned int map,
361 struct alps_bitmap_point *low,
362 struct alps_bitmap_point *high,
363 int *fingers)
364 {
365 struct alps_bitmap_point *point;
366 int i, bit, prev_bit = 0;
367
368 point = low;
369 for (i = 0; map != 0; i++, map >>= 1) {
370 bit = map & 1;
371 if (bit) {
372 if (!prev_bit) {
373 point->start_bit = i;
374 point->num_bits = 0;
375 (*fingers)++;
376 }
377 point->num_bits++;
378 } else {
379 if (prev_bit)
380 point = high;
381 }
382 prev_bit = bit;
383 }
384 }
385
386 /*
387 * Process bitmap data from v3 and v4 protocols. Returns the number of
388 * fingers detected. A return value of 0 means at least one of the
389 * bitmaps was empty.
390 *
391 * The bitmaps don't have enough data to track fingers, so this function
392 * only generates points representing a bounding box of all contacts.
393 * These points are returned in fields->mt when the return value
394 * is greater than 0.
395 */
396 static int alps_process_bitmap(struct alps_data *priv,
397 struct alps_fields *fields)
398 {
399 int i, fingers_x = 0, fingers_y = 0, fingers;
400 struct alps_bitmap_point x_low = {0,}, x_high = {0,};
401 struct alps_bitmap_point y_low = {0,}, y_high = {0,};
402
403 if (!fields->x_map || !fields->y_map)
404 return 0;
405
406 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
407 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
408
409 /*
410 * Fingers can overlap, so we use the maximum count of fingers
411 * on either axis as the finger count.
412 */
413 fingers = max(fingers_x, fingers_y);
414
415 /*
416 * If an axis reports only a single contact, we have overlapping or
417 * adjacent fingers. Divide the single contact between the two points.
418 */
419 if (fingers_x == 1) {
420 i = (x_low.num_bits - 1) / 2;
421 x_low.num_bits = x_low.num_bits - i;
422 x_high.start_bit = x_low.start_bit + i;
423 x_high.num_bits = max(i, 1);
424 }
425 if (fingers_y == 1) {
426 i = (y_low.num_bits - 1) / 2;
427 y_low.num_bits = y_low.num_bits - i;
428 y_high.start_bit = y_low.start_bit + i;
429 y_high.num_bits = max(i, 1);
430 }
431
432 fields->mt[0].x =
433 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
434 (2 * (priv->x_bits - 1));
435 fields->mt[0].y =
436 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
437 (2 * (priv->y_bits - 1));
438
439 fields->mt[1].x =
440 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
441 (2 * (priv->x_bits - 1));
442 fields->mt[1].y =
443 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
444 (2 * (priv->y_bits - 1));
445
446 /* y-bitmap order is reversed, except on rushmore */
447 if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
448 fields->mt[0].y = priv->y_max - fields->mt[0].y;
449 fields->mt[1].y = priv->y_max - fields->mt[1].y;
450 }
451
452 return fingers;
453 }
454
455 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
456 {
457 input_mt_slot(dev, slot);
458 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
459 input_report_abs(dev, ABS_MT_POSITION_X, x);
460 input_report_abs(dev, ABS_MT_POSITION_Y, y);
461 }
462
463 static void alps_report_mt_data(struct psmouse *psmouse, int n)
464 {
465 struct alps_data *priv = psmouse->private;
466 struct input_dev *dev = psmouse->dev;
467 struct alps_fields *f = &priv->f;
468 int i, slot[MAX_TOUCHES];
469
470 input_mt_assign_slots(dev, slot, f->mt, n, 0);
471 for (i = 0; i < n; i++)
472 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
473
474 input_mt_sync_frame(dev);
475 }
476
477 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
478 {
479 struct alps_data *priv = psmouse->private;
480 struct input_dev *dev = psmouse->dev;
481 struct alps_fields *f = &priv->f;
482
483 /* Use st data when we don't have mt data */
484 if (fingers < 2) {
485 f->mt[0].x = f->st.x;
486 f->mt[0].y = f->st.y;
487 fingers = f->pressure > 0 ? 1 : 0;
488 }
489
490 alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
491
492 input_mt_report_finger_count(dev, fingers);
493
494 input_report_key(dev, BTN_LEFT, f->left);
495 input_report_key(dev, BTN_RIGHT, f->right);
496 input_report_key(dev, BTN_MIDDLE, f->middle);
497
498 input_report_abs(dev, ABS_PRESSURE, f->pressure);
499
500 input_sync(dev);
501 }
502
503 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
504 {
505 struct alps_data *priv = psmouse->private;
506 unsigned char *packet = psmouse->packet;
507 struct input_dev *dev = priv->dev2;
508 int x, y, z, left, right, middle;
509
510 /* It should be a DualPoint when received trackstick packet */
511 if (!(priv->flags & ALPS_DUALPOINT)) {
512 psmouse_warn(psmouse,
513 "Rejected trackstick packet from non DualPoint device");
514 return;
515 }
516
517 /* Sanity check packet */
518 if (!(packet[0] & 0x40)) {
519 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
520 return;
521 }
522
523 /*
524 * There's a special packet that seems to indicate the end
525 * of a stream of trackstick data. Filter these out.
526 */
527 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
528 return;
529
530 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
531 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
532 z = (packet[4] & 0x7c) >> 2;
533
534 /*
535 * The x and y values tend to be quite large, and when used
536 * alone the trackstick is difficult to use. Scale them down
537 * to compensate.
538 */
539 x /= 8;
540 y /= 8;
541
542 input_report_rel(dev, REL_X, x);
543 input_report_rel(dev, REL_Y, -y);
544
545 /*
546 * Most ALPS models report the trackstick buttons in the touchpad
547 * packets, but a few report them here. No reliable way has been
548 * found to differentiate between the models upfront, so we enable
549 * the quirk in response to seeing a button press in the trackstick
550 * packet.
551 */
552 left = packet[3] & 0x01;
553 right = packet[3] & 0x02;
554 middle = packet[3] & 0x04;
555
556 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
557 (left || right || middle))
558 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
559
560 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
561 input_report_key(dev, BTN_LEFT, left);
562 input_report_key(dev, BTN_RIGHT, right);
563 input_report_key(dev, BTN_MIDDLE, middle);
564 }
565
566 input_sync(dev);
567 return;
568 }
569
570 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
571 {
572 f->left = !!(p[3] & 0x01);
573 f->right = !!(p[3] & 0x02);
574 f->middle = !!(p[3] & 0x04);
575
576 f->ts_left = !!(p[3] & 0x10);
577 f->ts_right = !!(p[3] & 0x20);
578 f->ts_middle = !!(p[3] & 0x40);
579 }
580
581 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
582 struct psmouse *psmouse)
583 {
584 f->first_mp = !!(p[4] & 0x40);
585 f->is_mp = !!(p[0] & 0x40);
586
587 f->fingers = (p[5] & 0x3) + 1;
588 f->x_map = ((p[4] & 0x7e) << 8) |
589 ((p[1] & 0x7f) << 2) |
590 ((p[0] & 0x30) >> 4);
591 f->y_map = ((p[3] & 0x70) << 4) |
592 ((p[2] & 0x7f) << 1) |
593 (p[4] & 0x01);
594
595 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
596 ((p[0] & 0x30) >> 4);
597 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
598 f->pressure = p[5] & 0x7f;
599
600 alps_decode_buttons_v3(f, p);
601
602 return 0;
603 }
604
605 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
606 struct psmouse *psmouse)
607 {
608 alps_decode_pinnacle(f, p, psmouse);
609
610 /* Rushmore's packet decode has a bit difference with Pinnacle's */
611 f->is_mp = !!(p[5] & 0x40);
612 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
613 f->x_map |= (p[5] & 0x10) << 11;
614 f->y_map |= (p[5] & 0x20) << 6;
615
616 return 0;
617 }
618
619 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
620 struct psmouse *psmouse)
621 {
622 u64 palm_data = 0;
623 struct alps_data *priv = psmouse->private;
624
625 f->first_mp = !!(p[0] & 0x02);
626 f->is_mp = !!(p[0] & 0x20);
627
628 if (!f->is_mp) {
629 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
630 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
631 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
632 alps_decode_buttons_v3(f, p);
633 } else {
634 f->fingers = ((p[0] & 0x6) >> 1 |
635 (p[0] & 0x10) >> 2);
636
637 palm_data = (p[1] & 0x7f) |
638 ((p[2] & 0x7f) << 7) |
639 ((p[4] & 0x7f) << 14) |
640 ((p[5] & 0x7f) << 21) |
641 ((p[3] & 0x07) << 28) |
642 (((u64)p[3] & 0x70) << 27) |
643 (((u64)p[0] & 0x01) << 34);
644
645 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
646 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
647
648 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
649 f->x_map = (palm_data >> priv->y_bits) &
650 (BIT(priv->x_bits) - 1);
651 }
652
653 return 0;
654 }
655
656 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
657 {
658 struct alps_data *priv = psmouse->private;
659 unsigned char *packet = psmouse->packet;
660 struct input_dev *dev2 = priv->dev2;
661 struct alps_fields *f = &priv->f;
662 int fingers = 0;
663
664 memset(f, 0, sizeof(*f));
665
666 priv->decode_fields(f, packet, psmouse);
667
668 /*
669 * There's no single feature of touchpad position and bitmap packets
670 * that can be used to distinguish between them. We rely on the fact
671 * that a bitmap packet should always follow a position packet with
672 * bit 6 of packet[4] set.
673 */
674 if (priv->multi_packet) {
675 /*
676 * Sometimes a position packet will indicate a multi-packet
677 * sequence, but then what follows is another position
678 * packet. Check for this, and when it happens process the
679 * position packet as usual.
680 */
681 if (f->is_mp) {
682 fingers = f->fingers;
683 if (priv->proto_version == ALPS_PROTO_V3 ||
684 priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
685 if (alps_process_bitmap(priv, f) == 0)
686 fingers = 0; /* Use st data */
687
688 /* Now process position packet */
689 priv->decode_fields(f, priv->multi_data,
690 psmouse);
691 } else {
692 /*
693 * Because Dolphin uses position packet's
694 * coordinate data as Pt1 and uses it to
695 * calculate Pt2, so we need to do position
696 * packet decode first.
697 */
698 priv->decode_fields(f, priv->multi_data,
699 psmouse);
700
701 /*
702 * Since Dolphin's finger number is reliable,
703 * there is no need to compare with bmap_fn.
704 */
705 alps_process_bitmap_dolphin(priv, f);
706 }
707 } else {
708 priv->multi_packet = 0;
709 }
710 }
711
712 /*
713 * Bit 6 of byte 0 is not usually set in position packets. The only
714 * times it seems to be set is in situations where the data is
715 * suspect anyway, e.g. a palm resting flat on the touchpad. Given
716 * this combined with the fact that this bit is useful for filtering
717 * out misidentified bitmap packets, we reject anything with this
718 * bit set.
719 */
720 if (f->is_mp)
721 return;
722
723 if (!priv->multi_packet && f->first_mp) {
724 priv->multi_packet = 1;
725 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
726 return;
727 }
728
729 priv->multi_packet = 0;
730
731 /*
732 * Sometimes the hardware sends a single packet with z = 0
733 * in the middle of a stream. Real releases generate packets
734 * with x, y, and z all zero, so these seem to be flukes.
735 * Ignore them.
736 */
737 if (f->st.x && f->st.y && !f->pressure)
738 return;
739
740 alps_report_semi_mt_data(psmouse, fingers);
741
742 if ((priv->flags & ALPS_DUALPOINT) &&
743 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
744 input_report_key(dev2, BTN_LEFT, f->ts_left);
745 input_report_key(dev2, BTN_RIGHT, f->ts_right);
746 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
747 input_sync(dev2);
748 }
749 }
750
751 static void alps_process_packet_v3(struct psmouse *psmouse)
752 {
753 unsigned char *packet = psmouse->packet;
754
755 /*
756 * v3 protocol packets come in three types, two representing
757 * touchpad data and one representing trackstick data.
758 * Trackstick packets seem to be distinguished by always
759 * having 0x3f in the last byte. This value has never been
760 * observed in the last byte of either of the other types
761 * of packets.
762 */
763 if (packet[5] == 0x3f) {
764 alps_process_trackstick_packet_v3(psmouse);
765 return;
766 }
767
768 alps_process_touchpad_packet_v3_v5(psmouse);
769 }
770
771 static void alps_process_packet_v6(struct psmouse *psmouse)
772 {
773 struct alps_data *priv = psmouse->private;
774 unsigned char *packet = psmouse->packet;
775 struct input_dev *dev = psmouse->dev;
776 struct input_dev *dev2 = priv->dev2;
777 int x, y, z, left, right, middle;
778
779 /*
780 * We can use Byte5 to distinguish if the packet is from Touchpad
781 * or Trackpoint.
782 * Touchpad: 0 - 0x7E
783 * Trackpoint: 0x7F
784 */
785 if (packet[5] == 0x7F) {
786 /* It should be a DualPoint when received Trackpoint packet */
787 if (!(priv->flags & ALPS_DUALPOINT)) {
788 psmouse_warn(psmouse,
789 "Rejected trackstick packet from non DualPoint device");
790 return;
791 }
792
793 /* Trackpoint packet */
794 x = packet[1] | ((packet[3] & 0x20) << 2);
795 y = packet[2] | ((packet[3] & 0x40) << 1);
796 z = packet[4];
797 left = packet[3] & 0x01;
798 right = packet[3] & 0x02;
799 middle = packet[3] & 0x04;
800
801 /* To prevent the cursor jump when finger lifted */
802 if (x == 0x7F && y == 0x7F && z == 0x7F)
803 x = y = z = 0;
804
805 /* Divide 4 since trackpoint's speed is too fast */
806 input_report_rel(dev2, REL_X, (char)x / 4);
807 input_report_rel(dev2, REL_Y, -((char)y / 4));
808
809 input_report_key(dev2, BTN_LEFT, left);
810 input_report_key(dev2, BTN_RIGHT, right);
811 input_report_key(dev2, BTN_MIDDLE, middle);
812
813 input_sync(dev2);
814 return;
815 }
816
817 /* Touchpad packet */
818 x = packet[1] | ((packet[3] & 0x78) << 4);
819 y = packet[2] | ((packet[4] & 0x78) << 4);
820 z = packet[5];
821 left = packet[3] & 0x01;
822 right = packet[3] & 0x02;
823
824 if (z > 30)
825 input_report_key(dev, BTN_TOUCH, 1);
826 if (z < 25)
827 input_report_key(dev, BTN_TOUCH, 0);
828
829 if (z > 0) {
830 input_report_abs(dev, ABS_X, x);
831 input_report_abs(dev, ABS_Y, y);
832 }
833
834 input_report_abs(dev, ABS_PRESSURE, z);
835 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
836
837 /* v6 touchpad does not have middle button */
838 input_report_key(dev, BTN_LEFT, left);
839 input_report_key(dev, BTN_RIGHT, right);
840
841 input_sync(dev);
842 }
843
844 static void alps_process_packet_v4(struct psmouse *psmouse)
845 {
846 struct alps_data *priv = psmouse->private;
847 unsigned char *packet = psmouse->packet;
848 struct alps_fields *f = &priv->f;
849 int offset;
850
851 /*
852 * v4 has a 6-byte encoding for bitmap data, but this data is
853 * broken up between 3 normal packets. Use priv->multi_packet to
854 * track our position in the bitmap packet.
855 */
856 if (packet[6] & 0x40) {
857 /* sync, reset position */
858 priv->multi_packet = 0;
859 }
860
861 if (WARN_ON_ONCE(priv->multi_packet > 2))
862 return;
863
864 offset = 2 * priv->multi_packet;
865 priv->multi_data[offset] = packet[6];
866 priv->multi_data[offset + 1] = packet[7];
867
868 if (++priv->multi_packet > 2) {
869 priv->multi_packet = 0;
870
871 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
872 ((priv->multi_data[3] & 0x60) << 3) |
873 ((priv->multi_data[0] & 0x3f) << 2) |
874 ((priv->multi_data[1] & 0x60) >> 5);
875 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
876 ((priv->multi_data[3] & 0x1f) << 5) |
877 (priv->multi_data[1] & 0x1f);
878
879 f->fingers = alps_process_bitmap(priv, f);
880 }
881
882 f->left = !!(packet[4] & 0x01);
883 f->right = !!(packet[4] & 0x02);
884
885 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
886 ((packet[0] & 0x30) >> 4);
887 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
888 f->pressure = packet[5] & 0x7f;
889
890 alps_report_semi_mt_data(psmouse, f->fingers);
891 }
892
893 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
894 {
895 switch (psmouse->pktcnt) {
896 case 3:
897 return (psmouse->packet[2] & 0x40) == 0x40;
898 case 4:
899 return (psmouse->packet[3] & 0x48) == 0x48;
900 case 6:
901 return (psmouse->packet[5] & 0x40) == 0x00;
902 }
903 return true;
904 }
905
906 static unsigned char alps_get_packet_id_v7(char *byte)
907 {
908 unsigned char packet_id;
909
910 if (byte[4] & 0x40)
911 packet_id = V7_PACKET_ID_TWO;
912 else if (byte[4] & 0x01)
913 packet_id = V7_PACKET_ID_MULTI;
914 else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
915 packet_id = V7_PACKET_ID_NEW;
916 else if (byte[1] == 0x00 && byte[4] == 0x00)
917 packet_id = V7_PACKET_ID_IDLE;
918 else
919 packet_id = V7_PACKET_ID_UNKNOWN;
920
921 return packet_id;
922 }
923
924 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
925 unsigned char *pkt,
926 unsigned char pkt_id)
927 {
928 mt[0].x = ((pkt[2] & 0x80) << 4);
929 mt[0].x |= ((pkt[2] & 0x3F) << 5);
930 mt[0].x |= ((pkt[3] & 0x30) >> 1);
931 mt[0].x |= (pkt[3] & 0x07);
932 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
933
934 mt[1].x = ((pkt[3] & 0x80) << 4);
935 mt[1].x |= ((pkt[4] & 0x80) << 3);
936 mt[1].x |= ((pkt[4] & 0x3F) << 4);
937 mt[1].y = ((pkt[5] & 0x80) << 3);
938 mt[1].y |= ((pkt[5] & 0x3F) << 4);
939
940 switch (pkt_id) {
941 case V7_PACKET_ID_TWO:
942 mt[1].x &= ~0x000F;
943 mt[1].y |= 0x000F;
944 break;
945
946 case V7_PACKET_ID_MULTI:
947 mt[1].x &= ~0x003F;
948 mt[1].y &= ~0x0020;
949 mt[1].y |= ((pkt[4] & 0x02) << 4);
950 mt[1].y |= 0x001F;
951 break;
952
953 case V7_PACKET_ID_NEW:
954 mt[1].x &= ~0x003F;
955 mt[1].x |= (pkt[0] & 0x20);
956 mt[1].y |= 0x000F;
957 break;
958 }
959
960 mt[0].y = 0x7FF - mt[0].y;
961 mt[1].y = 0x7FF - mt[1].y;
962 }
963
964 static int alps_get_mt_count(struct input_mt_pos *mt)
965 {
966 int i, fingers = 0;
967
968 for (i = 0; i < MAX_TOUCHES; i++) {
969 if (mt[i].x != 0 || mt[i].y != 0)
970 fingers++;
971 }
972
973 return fingers;
974 }
975
976 static int alps_decode_packet_v7(struct alps_fields *f,
977 unsigned char *p,
978 struct psmouse *psmouse)
979 {
980 struct alps_data *priv = psmouse->private;
981 unsigned char pkt_id;
982
983 pkt_id = alps_get_packet_id_v7(p);
984 if (pkt_id == V7_PACKET_ID_IDLE)
985 return 0;
986 if (pkt_id == V7_PACKET_ID_UNKNOWN)
987 return -1;
988 /*
989 * NEW packets are send to indicate a discontinuity in the finger
990 * coordinate reporting. Specifically a finger may have moved from
991 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
992 * us.
993 *
994 * NEW packets have 3 problems:
995 * 1) They do not contain middle / right button info (on non clickpads)
996 * this can be worked around by preserving the old button state
997 * 2) They do not contain an accurate fingercount, and they are
998 * typically send when the number of fingers changes. We cannot use
999 * the old finger count as that may mismatch with the amount of
1000 * touch coordinates we've available in the NEW packet
1001 * 3) Their x data for the second touch is inaccurate leading to
1002 * a possible jump of the x coordinate by 16 units when the first
1003 * non NEW packet comes in
1004 * Since problems 2 & 3 cannot be worked around, just ignore them.
1005 */
1006 if (pkt_id == V7_PACKET_ID_NEW)
1007 return 1;
1008
1009 alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1010
1011 if (pkt_id == V7_PACKET_ID_TWO)
1012 f->fingers = alps_get_mt_count(f->mt);
1013 else /* pkt_id == V7_PACKET_ID_MULTI */
1014 f->fingers = 3 + (p[5] & 0x03);
1015
1016 f->left = (p[0] & 0x80) >> 7;
1017 if (priv->flags & ALPS_BUTTONPAD) {
1018 if (p[0] & 0x20)
1019 f->fingers++;
1020 if (p[0] & 0x10)
1021 f->fingers++;
1022 } else {
1023 f->right = (p[0] & 0x20) >> 5;
1024 f->middle = (p[0] & 0x10) >> 4;
1025 }
1026
1027 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1028 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1029 f->mt[0].x = f->mt[1].x;
1030 f->mt[0].y = f->mt[1].y;
1031 f->mt[1].x = 0;
1032 f->mt[1].y = 0;
1033 }
1034
1035 return 0;
1036 }
1037
1038 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1039 {
1040 struct alps_data *priv = psmouse->private;
1041 unsigned char *packet = psmouse->packet;
1042 struct input_dev *dev2 = priv->dev2;
1043 int x, y, z, left, right, middle;
1044
1045 /* It should be a DualPoint when received trackstick packet */
1046 if (!(priv->flags & ALPS_DUALPOINT)) {
1047 psmouse_warn(psmouse,
1048 "Rejected trackstick packet from non DualPoint device");
1049 return;
1050 }
1051
1052 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1053 y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1054 ((packet[3] & 0x20) << 1);
1055 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1056
1057 left = (packet[1] & 0x01);
1058 right = (packet[1] & 0x02) >> 1;
1059 middle = (packet[1] & 0x04) >> 2;
1060
1061 /* Divide 2 since trackpoint's speed is too fast */
1062 input_report_rel(dev2, REL_X, (char)x / 2);
1063 input_report_rel(dev2, REL_Y, -((char)y / 2));
1064
1065 input_report_key(dev2, BTN_LEFT, left);
1066 input_report_key(dev2, BTN_RIGHT, right);
1067 input_report_key(dev2, BTN_MIDDLE, middle);
1068
1069 input_sync(dev2);
1070 }
1071
1072 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1073 {
1074 struct alps_data *priv = psmouse->private;
1075 struct input_dev *dev = psmouse->dev;
1076 struct alps_fields *f = &priv->f;
1077
1078 memset(f, 0, sizeof(*f));
1079
1080 if (priv->decode_fields(f, psmouse->packet, psmouse))
1081 return;
1082
1083 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1084
1085 input_mt_report_finger_count(dev, f->fingers);
1086
1087 input_report_key(dev, BTN_LEFT, f->left);
1088 input_report_key(dev, BTN_RIGHT, f->right);
1089 input_report_key(dev, BTN_MIDDLE, f->middle);
1090
1091 input_sync(dev);
1092 }
1093
1094 static void alps_process_packet_v7(struct psmouse *psmouse)
1095 {
1096 unsigned char *packet = psmouse->packet;
1097
1098 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1099 alps_process_trackstick_packet_v7(psmouse);
1100 else
1101 alps_process_touchpad_packet_v7(psmouse);
1102 }
1103
1104 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1105 {
1106 unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1107
1108 if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1109 (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1110 pkt_id = SS4_PACKET_ID_IDLE;
1111 } else if (!(byte[3] & 0x10)) {
1112 pkt_id = SS4_PACKET_ID_ONE;
1113 } else if (!(byte[3] & 0x20)) {
1114 pkt_id = SS4_PACKET_ID_TWO;
1115 } else {
1116 pkt_id = SS4_PACKET_ID_MULTI;
1117 }
1118
1119 return pkt_id;
1120 }
1121
1122 static int alps_decode_ss4_v2(struct alps_fields *f,
1123 unsigned char *p, struct psmouse *psmouse)
1124 {
1125 struct alps_data *priv = psmouse->private;
1126 unsigned char pkt_id;
1127 unsigned int no_data_x, no_data_y;
1128
1129 pkt_id = alps_get_pkt_id_ss4_v2(p);
1130
1131 /* Current packet is 1Finger coordinate packet */
1132 switch (pkt_id) {
1133 case SS4_PACKET_ID_ONE:
1134 f->mt[0].x = SS4_1F_X_V2(p);
1135 f->mt[0].y = SS4_1F_Y_V2(p);
1136 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1137 f->fingers = 1;
1138 f->first_mp = 0;
1139 f->is_mp = 0;
1140 break;
1141
1142 case SS4_PACKET_ID_TWO:
1143 if (priv->flags & ALPS_BUTTONPAD) {
1144 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1145 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1146 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1147 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1148 } else {
1149 f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1150 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1151 f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1152 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1153 }
1154 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1155
1156 if (SS4_IS_MF_CONTINUE(p)) {
1157 f->first_mp = 1;
1158 } else {
1159 f->fingers = 2;
1160 f->first_mp = 0;
1161 }
1162 f->is_mp = 0;
1163
1164 break;
1165
1166 case SS4_PACKET_ID_MULTI:
1167 if (priv->flags & ALPS_BUTTONPAD) {
1168 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1169 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1170 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1171 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1172 no_data_x = SS4_MFPACKET_NO_AX_BL;
1173 no_data_y = SS4_MFPACKET_NO_AY_BL;
1174 } else {
1175 f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1176 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1177 f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1178 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1179 no_data_x = SS4_MFPACKET_NO_AX;
1180 no_data_y = SS4_MFPACKET_NO_AY;
1181 }
1182
1183 f->first_mp = 0;
1184 f->is_mp = 1;
1185
1186 if (SS4_IS_5F_DETECTED(p)) {
1187 f->fingers = 5;
1188 } else if (f->mt[3].x == no_data_x &&
1189 f->mt[3].y == no_data_y) {
1190 f->mt[3].x = 0;
1191 f->mt[3].y = 0;
1192 f->fingers = 3;
1193 } else {
1194 f->fingers = 4;
1195 }
1196 break;
1197
1198 case SS4_PACKET_ID_IDLE:
1199 default:
1200 memset(f, 0, sizeof(struct alps_fields));
1201 break;
1202 }
1203
1204 f->left = !!(SS4_BTN_V2(p) & 0x01);
1205 if (!(priv->flags & ALPS_BUTTONPAD)) {
1206 f->right = !!(SS4_BTN_V2(p) & 0x02);
1207 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1208 }
1209
1210 return 0;
1211 }
1212
1213 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1214 {
1215 struct alps_data *priv = psmouse->private;
1216 unsigned char *packet = psmouse->packet;
1217 struct input_dev *dev = psmouse->dev;
1218 struct alps_fields *f = &priv->f;
1219
1220 memset(f, 0, sizeof(struct alps_fields));
1221 priv->decode_fields(f, packet, psmouse);
1222 if (priv->multi_packet) {
1223 /*
1224 * Sometimes the first packet will indicate a multi-packet
1225 * sequence, but sometimes the next multi-packet would not
1226 * come. Check for this, and when it happens process the
1227 * position packet as usual.
1228 */
1229 if (f->is_mp) {
1230 /* Now process the 1st packet */
1231 priv->decode_fields(f, priv->multi_data, psmouse);
1232 } else {
1233 priv->multi_packet = 0;
1234 }
1235 }
1236
1237 /*
1238 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1239 * When it is set, it means 2nd packet comes without 1st packet come.
1240 */
1241 if (f->is_mp)
1242 return;
1243
1244 /* Save the first packet */
1245 if (!priv->multi_packet && f->first_mp) {
1246 priv->multi_packet = 1;
1247 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1248 return;
1249 }
1250
1251 priv->multi_packet = 0;
1252
1253 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1254
1255 input_mt_report_finger_count(dev, f->fingers);
1256
1257 input_report_key(dev, BTN_LEFT, f->left);
1258 input_report_key(dev, BTN_RIGHT, f->right);
1259 input_report_key(dev, BTN_MIDDLE, f->middle);
1260
1261 input_report_abs(dev, ABS_PRESSURE, f->pressure);
1262 input_sync(dev);
1263 }
1264
1265 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1266 {
1267 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1268 return false;
1269 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1270 return false;
1271 return true;
1272 }
1273
1274 static DEFINE_MUTEX(alps_mutex);
1275
1276 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1277 {
1278 struct alps_data *priv =
1279 container_of(work, struct alps_data, dev3_register_work.work);
1280 struct psmouse *psmouse = priv->psmouse;
1281 struct input_dev *dev3;
1282 int error = 0;
1283
1284 mutex_lock(&alps_mutex);
1285
1286 if (priv->dev3)
1287 goto out;
1288
1289 dev3 = input_allocate_device();
1290 if (!dev3) {
1291 psmouse_err(psmouse, "failed to allocate secondary device\n");
1292 error = -ENOMEM;
1293 goto out;
1294 }
1295
1296 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1297 psmouse->ps2dev.serio->phys,
1298 (priv->dev2 ? "input2" : "input1"));
1299 dev3->phys = priv->phys3;
1300
1301 /*
1302 * format of input device name is: "protocol vendor name"
1303 * see function psmouse_switch_protocol() in psmouse-base.c
1304 */
1305 dev3->name = "PS/2 ALPS Mouse";
1306
1307 dev3->id.bustype = BUS_I8042;
1308 dev3->id.vendor = 0x0002;
1309 dev3->id.product = PSMOUSE_PS2;
1310 dev3->id.version = 0x0000;
1311 dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1312
1313 input_set_capability(dev3, EV_REL, REL_X);
1314 input_set_capability(dev3, EV_REL, REL_Y);
1315 input_set_capability(dev3, EV_KEY, BTN_LEFT);
1316 input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1317 input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1318
1319 __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1320
1321 error = input_register_device(dev3);
1322 if (error) {
1323 psmouse_err(psmouse,
1324 "failed to register secondary device: %d\n",
1325 error);
1326 input_free_device(dev3);
1327 goto out;
1328 }
1329
1330 priv->dev3 = dev3;
1331
1332 out:
1333 /*
1334 * Save the error code so that we can detect that we
1335 * already tried to create the device.
1336 */
1337 if (error)
1338 priv->dev3 = ERR_PTR(error);
1339
1340 mutex_unlock(&alps_mutex);
1341 }
1342
1343 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1344 unsigned char packet[],
1345 bool report_buttons)
1346 {
1347 struct alps_data *priv = psmouse->private;
1348 struct input_dev *dev, *dev2 = NULL;
1349
1350 /* Figure out which device to use to report the bare packet */
1351 if (priv->proto_version == ALPS_PROTO_V2 &&
1352 (priv->flags & ALPS_DUALPOINT)) {
1353 /* On V2 devices the DualPoint Stick reports bare packets */
1354 dev = priv->dev2;
1355 dev2 = psmouse->dev;
1356 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1357 /* Register dev3 mouse if we received PS/2 packet first time */
1358 if (!IS_ERR(priv->dev3))
1359 psmouse_queue_work(psmouse, &priv->dev3_register_work,
1360 0);
1361 return;
1362 } else {
1363 dev = priv->dev3;
1364 }
1365
1366 if (report_buttons)
1367 alps_report_buttons(dev, dev2,
1368 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1369
1370 input_report_rel(dev, REL_X,
1371 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1372 input_report_rel(dev, REL_Y,
1373 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1374
1375 input_sync(dev);
1376 }
1377
1378 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1379 {
1380 struct alps_data *priv = psmouse->private;
1381
1382 if (psmouse->pktcnt < 6)
1383 return PSMOUSE_GOOD_DATA;
1384
1385 if (psmouse->pktcnt == 6) {
1386 /*
1387 * Start a timer to flush the packet if it ends up last
1388 * 6-byte packet in the stream. Timer needs to fire
1389 * psmouse core times out itself. 20 ms should be enough
1390 * to decide if we are getting more data or not.
1391 */
1392 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1393 return PSMOUSE_GOOD_DATA;
1394 }
1395
1396 del_timer(&priv->timer);
1397
1398 if (psmouse->packet[6] & 0x80) {
1399
1400 /*
1401 * Highest bit is set - that means we either had
1402 * complete ALPS packet and this is start of the
1403 * next packet or we got garbage.
1404 */
1405
1406 if (((psmouse->packet[3] |
1407 psmouse->packet[4] |
1408 psmouse->packet[5]) & 0x80) ||
1409 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1410 psmouse_dbg(psmouse,
1411 "refusing packet %4ph (suspected interleaved ps/2)\n",
1412 psmouse->packet + 3);
1413 return PSMOUSE_BAD_DATA;
1414 }
1415
1416 priv->process_packet(psmouse);
1417
1418 /* Continue with the next packet */
1419 psmouse->packet[0] = psmouse->packet[6];
1420 psmouse->pktcnt = 1;
1421
1422 } else {
1423
1424 /*
1425 * High bit is 0 - that means that we indeed got a PS/2
1426 * packet in the middle of ALPS packet.
1427 *
1428 * There is also possibility that we got 6-byte ALPS
1429 * packet followed by 3-byte packet from trackpoint. We
1430 * can not distinguish between these 2 scenarios but
1431 * because the latter is unlikely to happen in course of
1432 * normal operation (user would need to press all
1433 * buttons on the pad and start moving trackpoint
1434 * without touching the pad surface) we assume former.
1435 * Even if we are wrong the wost thing that would happen
1436 * the cursor would jump but we should not get protocol
1437 * de-synchronization.
1438 */
1439
1440 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1441 false);
1442
1443 /*
1444 * Continue with the standard ALPS protocol handling,
1445 * but make sure we won't process it as an interleaved
1446 * packet again, which may happen if all buttons are
1447 * pressed. To avoid this let's reset the 4th bit which
1448 * is normally 1.
1449 */
1450 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1451 psmouse->pktcnt = 4;
1452 }
1453
1454 return PSMOUSE_GOOD_DATA;
1455 }
1456
1457 static void alps_flush_packet(unsigned long data)
1458 {
1459 struct psmouse *psmouse = (struct psmouse *)data;
1460 struct alps_data *priv = psmouse->private;
1461
1462 serio_pause_rx(psmouse->ps2dev.serio);
1463
1464 if (psmouse->pktcnt == psmouse->pktsize) {
1465
1466 /*
1467 * We did not any more data in reasonable amount of time.
1468 * Validate the last 3 bytes and process as a standard
1469 * ALPS packet.
1470 */
1471 if ((psmouse->packet[3] |
1472 psmouse->packet[4] |
1473 psmouse->packet[5]) & 0x80) {
1474 psmouse_dbg(psmouse,
1475 "refusing packet %3ph (suspected interleaved ps/2)\n",
1476 psmouse->packet + 3);
1477 } else {
1478 priv->process_packet(psmouse);
1479 }
1480 psmouse->pktcnt = 0;
1481 }
1482
1483 serio_continue_rx(psmouse->ps2dev.serio);
1484 }
1485
1486 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1487 {
1488 struct alps_data *priv = psmouse->private;
1489
1490 /*
1491 * Check if we are dealing with a bare PS/2 packet, presumably from
1492 * a device connected to the external PS/2 port. Because bare PS/2
1493 * protocol does not have enough constant bits to self-synchronize
1494 * properly we only do this if the device is fully synchronized.
1495 * Can not distinguish V8's first byte from PS/2 packet's
1496 */
1497 if (priv->proto_version != ALPS_PROTO_V8 &&
1498 !psmouse->out_of_sync_cnt &&
1499 (psmouse->packet[0] & 0xc8) == 0x08) {
1500
1501 if (psmouse->pktcnt == 3) {
1502 alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1503 true);
1504 return PSMOUSE_FULL_PACKET;
1505 }
1506 return PSMOUSE_GOOD_DATA;
1507 }
1508
1509 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1510
1511 if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1512 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1513 return alps_handle_interleaved_ps2(psmouse);
1514 }
1515
1516 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1517 psmouse_dbg(psmouse,
1518 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1519 psmouse->packet[0], priv->mask0, priv->byte0);
1520 return PSMOUSE_BAD_DATA;
1521 }
1522
1523 /* Bytes 2 - pktsize should have 0 in the highest bit */
1524 if (priv->proto_version < ALPS_PROTO_V5 &&
1525 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1526 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1527 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1528 psmouse->pktcnt - 1,
1529 psmouse->packet[psmouse->pktcnt - 1]);
1530
1531 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1532 psmouse->pktcnt == psmouse->pktsize) {
1533 /*
1534 * Some Dell boxes, such as Latitude E6440 or E7440
1535 * with closed lid, quite often smash last byte of
1536 * otherwise valid packet with 0xff. Given that the
1537 * next packet is very likely to be valid let's
1538 * report PSMOUSE_FULL_PACKET but not process data,
1539 * rather than reporting PSMOUSE_BAD_DATA and
1540 * filling the logs.
1541 */
1542 return PSMOUSE_FULL_PACKET;
1543 }
1544
1545 return PSMOUSE_BAD_DATA;
1546 }
1547
1548 if ((priv->proto_version == ALPS_PROTO_V7 &&
1549 !alps_is_valid_package_v7(psmouse)) ||
1550 (priv->proto_version == ALPS_PROTO_V8 &&
1551 !alps_is_valid_package_ss4_v2(psmouse))) {
1552 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1553 psmouse->pktcnt - 1,
1554 psmouse->packet[psmouse->pktcnt - 1]);
1555 return PSMOUSE_BAD_DATA;
1556 }
1557
1558 if (psmouse->pktcnt == psmouse->pktsize) {
1559 priv->process_packet(psmouse);
1560 return PSMOUSE_FULL_PACKET;
1561 }
1562
1563 return PSMOUSE_GOOD_DATA;
1564 }
1565
1566 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1567 {
1568 struct ps2dev *ps2dev = &psmouse->ps2dev;
1569 struct alps_data *priv = psmouse->private;
1570 int command;
1571 unsigned char *param;
1572 unsigned char dummy[4];
1573
1574 BUG_ON(nibble > 0xf);
1575
1576 command = priv->nibble_commands[nibble].command;
1577 param = (command & 0x0f00) ?
1578 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1579
1580 if (ps2_command(ps2dev, param, command))
1581 return -1;
1582
1583 return 0;
1584 }
1585
1586 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1587 {
1588 struct ps2dev *ps2dev = &psmouse->ps2dev;
1589 struct alps_data *priv = psmouse->private;
1590 int i, nibble;
1591
1592 if (ps2_command(ps2dev, NULL, priv->addr_command))
1593 return -1;
1594
1595 for (i = 12; i >= 0; i -= 4) {
1596 nibble = (addr >> i) & 0xf;
1597 if (alps_command_mode_send_nibble(psmouse, nibble))
1598 return -1;
1599 }
1600
1601 return 0;
1602 }
1603
1604 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1605 {
1606 struct ps2dev *ps2dev = &psmouse->ps2dev;
1607 unsigned char param[4];
1608
1609 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1610 return -1;
1611
1612 /*
1613 * The address being read is returned in the first two bytes
1614 * of the result. Check that this address matches the expected
1615 * address.
1616 */
1617 if (addr != ((param[0] << 8) | param[1]))
1618 return -1;
1619
1620 return param[2];
1621 }
1622
1623 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1624 {
1625 if (alps_command_mode_set_addr(psmouse, addr))
1626 return -1;
1627 return __alps_command_mode_read_reg(psmouse, addr);
1628 }
1629
1630 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1631 {
1632 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1633 return -1;
1634 if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1635 return -1;
1636 return 0;
1637 }
1638
1639 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1640 u8 value)
1641 {
1642 if (alps_command_mode_set_addr(psmouse, addr))
1643 return -1;
1644 return __alps_command_mode_write_reg(psmouse, value);
1645 }
1646
1647 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1648 int repeated_command, unsigned char *param)
1649 {
1650 struct ps2dev *ps2dev = &psmouse->ps2dev;
1651
1652 param[0] = 0;
1653 if (init_command && ps2_command(ps2dev, param, init_command))
1654 return -EIO;
1655
1656 if (ps2_command(ps2dev, NULL, repeated_command) ||
1657 ps2_command(ps2dev, NULL, repeated_command) ||
1658 ps2_command(ps2dev, NULL, repeated_command))
1659 return -EIO;
1660
1661 param[0] = param[1] = param[2] = 0xff;
1662 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1663 return -EIO;
1664
1665 psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1666 repeated_command, param);
1667 return 0;
1668 }
1669
1670 static bool alps_check_valid_firmware_id(unsigned char id[])
1671 {
1672 if (id[0] == 0x73)
1673 return true;
1674
1675 if (id[0] == 0x88 &&
1676 (id[1] == 0x07 ||
1677 id[1] == 0x08 ||
1678 (id[1] & 0xf0) == 0xb0 ||
1679 (id[1] & 0xf0) == 0xc0)) {
1680 return true;
1681 }
1682
1683 return false;
1684 }
1685
1686 static int alps_enter_command_mode(struct psmouse *psmouse)
1687 {
1688 unsigned char param[4];
1689
1690 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1691 psmouse_err(psmouse, "failed to enter command mode\n");
1692 return -1;
1693 }
1694
1695 if (!alps_check_valid_firmware_id(param)) {
1696 psmouse_dbg(psmouse,
1697 "unknown response while entering command mode\n");
1698 return -1;
1699 }
1700 return 0;
1701 }
1702
1703 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1704 {
1705 struct ps2dev *ps2dev = &psmouse->ps2dev;
1706 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1707 return -1;
1708 return 0;
1709 }
1710
1711 /*
1712 * For DualPoint devices select the device that should respond to
1713 * subsequent commands. It looks like glidepad is behind stickpointer,
1714 * I'd thought it would be other way around...
1715 */
1716 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1717 {
1718 struct ps2dev *ps2dev = &psmouse->ps2dev;
1719 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1720
1721 if (ps2_command(ps2dev, NULL, cmd) ||
1722 ps2_command(ps2dev, NULL, cmd) ||
1723 ps2_command(ps2dev, NULL, cmd) ||
1724 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1725 return -1;
1726
1727 /* we may get 3 more bytes, just ignore them */
1728 ps2_drain(ps2dev, 3, 100);
1729
1730 return 0;
1731 }
1732
1733 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1734 {
1735 struct ps2dev *ps2dev = &psmouse->ps2dev;
1736
1737 /* Try ALPS magic knock - 4 disable before enable */
1738 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1739 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1740 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1741 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1742 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1743 return -1;
1744
1745 /*
1746 * Switch mouse to poll (remote) mode so motion data will not
1747 * get in our way
1748 */
1749 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1750 }
1751
1752 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1753 {
1754 int i, nibble;
1755
1756 /*
1757 * b0-b11 are valid bits, send sequence is inverse.
1758 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1759 */
1760 for (i = 0; i <= 8; i += 4) {
1761 nibble = (word >> i) & 0xf;
1762 if (alps_command_mode_send_nibble(psmouse, nibble))
1763 return -1;
1764 }
1765
1766 return 0;
1767 }
1768
1769 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1770 u16 addr, u16 value)
1771 {
1772 struct ps2dev *ps2dev = &psmouse->ps2dev;
1773
1774 /* 0x0A0 is the command to write the word */
1775 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1776 alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1777 alps_monitor_mode_send_word(psmouse, addr) ||
1778 alps_monitor_mode_send_word(psmouse, value) ||
1779 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1780 return -1;
1781
1782 return 0;
1783 }
1784
1785 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1786 {
1787 struct ps2dev *ps2dev = &psmouse->ps2dev;
1788
1789 if (enable) {
1790 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1791 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1792 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1793 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1794 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1795 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1796 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1797 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1798 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1799 return -1;
1800 } else {
1801 /* EC to exit monitor mode */
1802 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1803 return -1;
1804 }
1805
1806 return 0;
1807 }
1808
1809 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1810 {
1811 u16 reg_val = 0x181;
1812 int ret = -1;
1813
1814 /* enter monitor mode, to write the register */
1815 if (alps_monitor_mode(psmouse, true))
1816 return -1;
1817
1818 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1819
1820 if (alps_monitor_mode(psmouse, false))
1821 ret = -1;
1822
1823 return ret;
1824 }
1825
1826 static int alps_get_status(struct psmouse *psmouse, char *param)
1827 {
1828 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1829 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1830 return -1;
1831
1832 return 0;
1833 }
1834
1835 /*
1836 * Turn touchpad tapping on or off. The sequences are:
1837 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1838 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1839 * My guess that 0xE9 (GetInfo) is here as a sync point.
1840 * For models that also have stickpointer (DualPoints) its tapping
1841 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1842 * we don't fiddle with it.
1843 */
1844 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1845 {
1846 struct ps2dev *ps2dev = &psmouse->ps2dev;
1847 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1848 unsigned char tap_arg = enable ? 0x0A : 0x00;
1849 unsigned char param[4];
1850
1851 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1852 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1853 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1854 ps2_command(ps2dev, &tap_arg, cmd))
1855 return -1;
1856
1857 if (alps_get_status(psmouse, param))
1858 return -1;
1859
1860 return 0;
1861 }
1862
1863 /*
1864 * alps_poll() - poll the touchpad for current motion packet.
1865 * Used in resync.
1866 */
1867 static int alps_poll(struct psmouse *psmouse)
1868 {
1869 struct alps_data *priv = psmouse->private;
1870 unsigned char buf[sizeof(psmouse->packet)];
1871 bool poll_failed;
1872
1873 if (priv->flags & ALPS_PASS)
1874 alps_passthrough_mode_v2(psmouse, true);
1875
1876 poll_failed = ps2_command(&psmouse->ps2dev, buf,
1877 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1878
1879 if (priv->flags & ALPS_PASS)
1880 alps_passthrough_mode_v2(psmouse, false);
1881
1882 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1883 return -1;
1884
1885 if ((psmouse->badbyte & 0xc8) == 0x08) {
1886 /*
1887 * Poll the track stick ...
1888 */
1889 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1890 return -1;
1891 }
1892
1893 memcpy(psmouse->packet, buf, sizeof(buf));
1894 return 0;
1895 }
1896
1897 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1898 {
1899 struct alps_data *priv = psmouse->private;
1900
1901 if ((priv->flags & ALPS_PASS) &&
1902 alps_passthrough_mode_v2(psmouse, true)) {
1903 return -1;
1904 }
1905
1906 if (alps_tap_mode(psmouse, true)) {
1907 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1908 return -1;
1909 }
1910
1911 if (alps_absolute_mode_v1_v2(psmouse)) {
1912 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1913 return -1;
1914 }
1915
1916 if ((priv->flags & ALPS_PASS) &&
1917 alps_passthrough_mode_v2(psmouse, false)) {
1918 return -1;
1919 }
1920
1921 /* ALPS needs stream mode, otherwise it won't report any data */
1922 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1923 psmouse_err(psmouse, "Failed to enable stream mode\n");
1924 return -1;
1925 }
1926
1927 return 0;
1928 }
1929
1930 static int alps_hw_init_v6(struct psmouse *psmouse)
1931 {
1932 unsigned char param[2] = {0xC8, 0x14};
1933
1934 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1935 if (alps_passthrough_mode_v2(psmouse, true))
1936 return -1;
1937
1938 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1939 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1940 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1941 ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1942 ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1943 return -1;
1944
1945 if (alps_passthrough_mode_v2(psmouse, false))
1946 return -1;
1947
1948 if (alps_absolute_mode_v6(psmouse)) {
1949 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1950 return -1;
1951 }
1952
1953 return 0;
1954 }
1955
1956 /*
1957 * Enable or disable passthrough mode to the trackstick.
1958 */
1959 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1960 int reg_base, bool enable)
1961 {
1962 int reg_val, ret = -1;
1963
1964 if (alps_enter_command_mode(psmouse))
1965 return -1;
1966
1967 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1968 if (reg_val == -1)
1969 goto error;
1970
1971 if (enable)
1972 reg_val |= 0x01;
1973 else
1974 reg_val &= ~0x01;
1975
1976 ret = __alps_command_mode_write_reg(psmouse, reg_val);
1977
1978 error:
1979 if (alps_exit_command_mode(psmouse))
1980 ret = -1;
1981 return ret;
1982 }
1983
1984 /* Must be in command mode when calling this function */
1985 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1986 {
1987 int reg_val;
1988
1989 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1990 if (reg_val == -1)
1991 return -1;
1992
1993 reg_val |= 0x06;
1994 if (__alps_command_mode_write_reg(psmouse, reg_val))
1995 return -1;
1996
1997 return 0;
1998 }
1999
2000 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
2001 {
2002 int ret = -EIO, reg_val;
2003
2004 if (alps_enter_command_mode(psmouse))
2005 goto error;
2006
2007 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2008 if (reg_val == -1)
2009 goto error;
2010
2011 /* bit 7: trackstick is present */
2012 ret = reg_val & 0x80 ? 0 : -ENODEV;
2013
2014 error:
2015 alps_exit_command_mode(psmouse);
2016 return ret;
2017 }
2018
2019 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2020 {
2021 struct ps2dev *ps2dev = &psmouse->ps2dev;
2022 int ret = 0;
2023 unsigned char param[4];
2024
2025 if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2026 return -EIO;
2027
2028 /*
2029 * E7 report for the trackstick
2030 *
2031 * There have been reports of failures to seem to trace back
2032 * to the above trackstick check failing. When these occur
2033 * this E7 report fails, so when that happens we continue
2034 * with the assumption that there isn't a trackstick after
2035 * all.
2036 */
2037 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2038 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2039 ret = -ENODEV;
2040 } else {
2041 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2042
2043 /*
2044 * Not sure what this does, but it is absolutely
2045 * essential. Without it, the touchpad does not
2046 * work at all and the trackstick just emits normal
2047 * PS/2 packets.
2048 */
2049 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2050 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2051 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2052 alps_command_mode_send_nibble(psmouse, 0x9) ||
2053 alps_command_mode_send_nibble(psmouse, 0x4)) {
2054 psmouse_err(psmouse,
2055 "Error sending magic E6 sequence\n");
2056 ret = -EIO;
2057 goto error;
2058 }
2059
2060 /*
2061 * This ensures the trackstick packets are in the format
2062 * supported by this driver. If bit 1 isn't set the packet
2063 * format is different.
2064 */
2065 if (alps_enter_command_mode(psmouse) ||
2066 alps_command_mode_write_reg(psmouse,
2067 reg_base + 0x08, 0x82) ||
2068 alps_exit_command_mode(psmouse))
2069 ret = -EIO;
2070 }
2071
2072 error:
2073 if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2074 ret = -EIO;
2075
2076 return ret;
2077 }
2078
2079 static int alps_hw_init_v3(struct psmouse *psmouse)
2080 {
2081 struct ps2dev *ps2dev = &psmouse->ps2dev;
2082 int reg_val;
2083 unsigned char param[4];
2084
2085 reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2086 if (reg_val == -EIO)
2087 goto error;
2088
2089 if (reg_val == 0 &&
2090 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2091 goto error;
2092
2093 if (alps_enter_command_mode(psmouse) ||
2094 alps_absolute_mode_v3(psmouse)) {
2095 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2096 goto error;
2097 }
2098
2099 reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2100 if (reg_val == -1)
2101 goto error;
2102 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2103 goto error;
2104
2105 reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2106 if (reg_val == -1)
2107 goto error;
2108 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2109 goto error;
2110
2111 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2112 goto error;
2113 if (__alps_command_mode_write_reg(psmouse, 0x04))
2114 goto error;
2115
2116 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2117 goto error;
2118 if (__alps_command_mode_write_reg(psmouse, 0x03))
2119 goto error;
2120
2121 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2122 goto error;
2123 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2124 goto error;
2125
2126 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2127 goto error;
2128 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2129 goto error;
2130
2131 alps_exit_command_mode(psmouse);
2132
2133 /* Set rate and enable data reporting */
2134 param[0] = 0x64;
2135 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2136 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2137 psmouse_err(psmouse, "Failed to enable data reporting\n");
2138 return -1;
2139 }
2140
2141 return 0;
2142
2143 error:
2144 /*
2145 * Leaving the touchpad in command mode will essentially render
2146 * it unusable until the machine reboots, so exit it here just
2147 * to be safe
2148 */
2149 alps_exit_command_mode(psmouse);
2150 return -1;
2151 }
2152
2153 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2154 {
2155 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2156 struct alps_data *priv = psmouse->private;
2157
2158 reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2159 if (reg < 0)
2160 return reg;
2161
2162 x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2163 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2164
2165 y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2166 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2167
2168 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2169 if (reg < 0)
2170 return reg;
2171
2172 x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2173 x_electrode = 17 + x_electrode;
2174
2175 y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2176 y_electrode = 13 + y_electrode;
2177
2178 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2179 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2180
2181 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2182 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2183
2184 psmouse_dbg(psmouse,
2185 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2186 x_pitch, y_pitch, x_electrode, y_electrode,
2187 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2188
2189 return 0;
2190 }
2191
2192 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2193 {
2194 struct alps_data *priv = psmouse->private;
2195 struct ps2dev *ps2dev = &psmouse->ps2dev;
2196 int reg_val, ret = -1;
2197
2198 if (priv->flags & ALPS_DUALPOINT) {
2199 reg_val = alps_setup_trackstick_v3(psmouse,
2200 ALPS_REG_BASE_RUSHMORE);
2201 if (reg_val == -EIO)
2202 goto error;
2203 }
2204
2205 if (alps_enter_command_mode(psmouse) ||
2206 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2207 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2208 goto error;
2209
2210 if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2211 goto error;
2212
2213 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2214 if (reg_val == -1)
2215 goto error;
2216 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2217 goto error;
2218
2219 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2220 goto error;
2221
2222 /* enter absolute mode */
2223 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2224 if (reg_val == -1)
2225 goto error;
2226 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2227 goto error;
2228
2229 alps_exit_command_mode(psmouse);
2230 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2231
2232 error:
2233 alps_exit_command_mode(psmouse);
2234 return ret;
2235 }
2236
2237 /* Must be in command mode when calling this function */
2238 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2239 {
2240 int reg_val;
2241
2242 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2243 if (reg_val == -1)
2244 return -1;
2245
2246 reg_val |= 0x02;
2247 if (__alps_command_mode_write_reg(psmouse, reg_val))
2248 return -1;
2249
2250 return 0;
2251 }
2252
2253 static int alps_hw_init_v4(struct psmouse *psmouse)
2254 {
2255 struct ps2dev *ps2dev = &psmouse->ps2dev;
2256 unsigned char param[4];
2257
2258 if (alps_enter_command_mode(psmouse))
2259 goto error;
2260
2261 if (alps_absolute_mode_v4(psmouse)) {
2262 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2263 goto error;
2264 }
2265
2266 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2267 goto error;
2268
2269 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2270 goto error;
2271
2272 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2273 goto error;
2274
2275 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2276 goto error;
2277
2278 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2279 goto error;
2280
2281 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2282 goto error;
2283
2284 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2285 goto error;
2286
2287 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2288 goto error;
2289
2290 alps_exit_command_mode(psmouse);
2291
2292 /*
2293 * This sequence changes the output from a 9-byte to an
2294 * 8-byte format. All the same data seems to be present,
2295 * just in a more compact format.
2296 */
2297 param[0] = 0xc8;
2298 param[1] = 0x64;
2299 param[2] = 0x50;
2300 if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2301 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2302 ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2303 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2304 return -1;
2305
2306 /* Set rate and enable data reporting */
2307 param[0] = 0x64;
2308 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2309 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2310 psmouse_err(psmouse, "Failed to enable data reporting\n");
2311 return -1;
2312 }
2313
2314 return 0;
2315
2316 error:
2317 /*
2318 * Leaving the touchpad in command mode will essentially render
2319 * it unusable until the machine reboots, so exit it here just
2320 * to be safe
2321 */
2322 alps_exit_command_mode(psmouse);
2323 return -1;
2324 }
2325
2326 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2327 unsigned char index, unsigned char otp[])
2328 {
2329 struct ps2dev *ps2dev = &psmouse->ps2dev;
2330
2331 switch (index) {
2332 case 0:
2333 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2334 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2335 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2336 return -1;
2337
2338 break;
2339
2340 case 1:
2341 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2342 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2343 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2344 return -1;
2345
2346 break;
2347 }
2348
2349 return 0;
2350 }
2351
2352 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2353 struct alps_data *priv)
2354 {
2355 int num_x_electrode;
2356 int num_y_electrode;
2357 int x_pitch, y_pitch, x_phys, y_phys;
2358
2359 num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2360 num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2361
2362 priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2363 priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2364
2365 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2366 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2367
2368 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2369 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2370
2371 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2372 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2373
2374 return 0;
2375 }
2376
2377 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2378 struct alps_data *priv)
2379 {
2380 unsigned char is_btnless;
2381
2382 is_btnless = (otp[1][1] >> 3) & 0x01;
2383
2384 if (is_btnless)
2385 priv->flags |= ALPS_BUTTONPAD;
2386
2387 return 0;
2388 }
2389
2390 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2391 struct alps_data *priv)
2392 {
2393 unsigned char otp[2][4];
2394
2395 memset(otp, 0, sizeof(otp));
2396
2397 if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2398 alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2399 return -1;
2400
2401 alps_update_device_area_ss4_v2(otp, priv);
2402
2403 alps_update_btn_info_ss4_v2(otp, priv);
2404
2405 return 0;
2406 }
2407
2408 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2409 struct alps_data *priv)
2410 {
2411 struct ps2dev *ps2dev = &psmouse->ps2dev;
2412 unsigned char param[4] = {0};
2413 int num_x_electrode, num_y_electrode;
2414
2415 if (alps_enter_command_mode(psmouse))
2416 return -1;
2417
2418 param[0] = 0x0a;
2419 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2420 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2421 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2422 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2423 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2424 return -1;
2425
2426 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2427 return -1;
2428
2429 /*
2430 * Dolphin's sensor line number is not fixed. It can be calculated
2431 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2432 * Further more, we can get device's x_max and y_max by multiplying
2433 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2434 *
2435 * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2436 * real sensor line number X = 11 + 8 = 19, and
2437 * real sensor line number Y = 8 + 1 = 9.
2438 * So, x_max = (19 - 1) * 64 = 1152, and
2439 * y_max = (9 - 1) * 64 = 512.
2440 */
2441 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2442 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2443 priv->x_bits = num_x_electrode;
2444 priv->y_bits = num_y_electrode;
2445 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2446 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2447
2448 if (alps_exit_command_mode(psmouse))
2449 return -1;
2450
2451 return 0;
2452 }
2453
2454 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2455 {
2456 struct ps2dev *ps2dev = &psmouse->ps2dev;
2457 unsigned char param[2];
2458
2459 /* This is dolphin "v1" as empirically defined by florin9doi */
2460 param[0] = 0x64;
2461 param[1] = 0x28;
2462
2463 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2464 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2465 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2466 return -1;
2467
2468 return 0;
2469 }
2470
2471 static int alps_hw_init_v7(struct psmouse *psmouse)
2472 {
2473 struct ps2dev *ps2dev = &psmouse->ps2dev;
2474 int reg_val, ret = -1;
2475
2476 if (alps_enter_command_mode(psmouse) ||
2477 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2478 goto error;
2479
2480 if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2481 goto error;
2482
2483 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2484 goto error;
2485
2486 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2487 if (reg_val == -1)
2488 goto error;
2489 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2490 goto error;
2491
2492 alps_exit_command_mode(psmouse);
2493 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2494
2495 error:
2496 alps_exit_command_mode(psmouse);
2497 return ret;
2498 }
2499
2500 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2501 {
2502 struct ps2dev *ps2dev = &psmouse->ps2dev;
2503 char param[2] = {0x64, 0x28};
2504 int ret = -1;
2505
2506 /* enter absolute mode */
2507 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2508 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2509 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2510 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2511 goto error;
2512 }
2513
2514 /* T.B.D. Decread noise packet number, delete in the future */
2515 if (alps_exit_command_mode(psmouse) ||
2516 alps_enter_command_mode(psmouse) ||
2517 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2518 goto error;
2519 }
2520 alps_exit_command_mode(psmouse);
2521
2522 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2523
2524 error:
2525 alps_exit_command_mode(psmouse);
2526 return ret;
2527 }
2528
2529 static int alps_set_protocol(struct psmouse *psmouse,
2530 struct alps_data *priv,
2531 const struct alps_protocol_info *protocol)
2532 {
2533 psmouse->private = priv;
2534
2535 setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2536
2537 priv->proto_version = protocol->version;
2538 priv->byte0 = protocol->byte0;
2539 priv->mask0 = protocol->mask0;
2540 priv->flags = protocol->flags;
2541
2542 priv->x_max = 2000;
2543 priv->y_max = 1400;
2544 priv->x_bits = 15;
2545 priv->y_bits = 11;
2546
2547 switch (priv->proto_version) {
2548 case ALPS_PROTO_V1:
2549 case ALPS_PROTO_V2:
2550 priv->hw_init = alps_hw_init_v1_v2;
2551 priv->process_packet = alps_process_packet_v1_v2;
2552 priv->set_abs_params = alps_set_abs_params_st;
2553 priv->x_max = 1023;
2554 priv->y_max = 767;
2555 break;
2556
2557 case ALPS_PROTO_V3:
2558 priv->hw_init = alps_hw_init_v3;
2559 priv->process_packet = alps_process_packet_v3;
2560 priv->set_abs_params = alps_set_abs_params_mt;
2561 priv->decode_fields = alps_decode_pinnacle;
2562 priv->nibble_commands = alps_v3_nibble_commands;
2563 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2564 break;
2565
2566 case ALPS_PROTO_V3_RUSHMORE:
2567 priv->hw_init = alps_hw_init_rushmore_v3;
2568 priv->process_packet = alps_process_packet_v3;
2569 priv->set_abs_params = alps_set_abs_params_mt;
2570 priv->decode_fields = alps_decode_rushmore;
2571 priv->nibble_commands = alps_v3_nibble_commands;
2572 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2573 priv->x_bits = 16;
2574 priv->y_bits = 12;
2575
2576 if (alps_probe_trackstick_v3(psmouse,
2577 ALPS_REG_BASE_RUSHMORE) < 0)
2578 priv->flags &= ~ALPS_DUALPOINT;
2579
2580 break;
2581
2582 case ALPS_PROTO_V4:
2583 priv->hw_init = alps_hw_init_v4;
2584 priv->process_packet = alps_process_packet_v4;
2585 priv->set_abs_params = alps_set_abs_params_mt;
2586 priv->nibble_commands = alps_v4_nibble_commands;
2587 priv->addr_command = PSMOUSE_CMD_DISABLE;
2588 break;
2589
2590 case ALPS_PROTO_V5:
2591 priv->hw_init = alps_hw_init_dolphin_v1;
2592 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2593 priv->decode_fields = alps_decode_dolphin;
2594 priv->set_abs_params = alps_set_abs_params_mt;
2595 priv->nibble_commands = alps_v3_nibble_commands;
2596 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2597 priv->x_bits = 23;
2598 priv->y_bits = 12;
2599
2600 if (alps_dolphin_get_device_area(psmouse, priv))
2601 return -EIO;
2602
2603 break;
2604
2605 case ALPS_PROTO_V6:
2606 priv->hw_init = alps_hw_init_v6;
2607 priv->process_packet = alps_process_packet_v6;
2608 priv->set_abs_params = alps_set_abs_params_st;
2609 priv->nibble_commands = alps_v6_nibble_commands;
2610 priv->x_max = 2047;
2611 priv->y_max = 1535;
2612 break;
2613
2614 case ALPS_PROTO_V7:
2615 priv->hw_init = alps_hw_init_v7;
2616 priv->process_packet = alps_process_packet_v7;
2617 priv->decode_fields = alps_decode_packet_v7;
2618 priv->set_abs_params = alps_set_abs_params_v7;
2619 priv->nibble_commands = alps_v3_nibble_commands;
2620 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2621 priv->x_max = 0xfff;
2622 priv->y_max = 0x7ff;
2623
2624 if (priv->fw_ver[1] != 0xba)
2625 priv->flags |= ALPS_BUTTONPAD;
2626
2627 break;
2628
2629 case ALPS_PROTO_V8:
2630 priv->hw_init = alps_hw_init_ss4_v2;
2631 priv->process_packet = alps_process_packet_ss4_v2;
2632 priv->decode_fields = alps_decode_ss4_v2;
2633 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2634 priv->nibble_commands = alps_v3_nibble_commands;
2635 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2636
2637 if (alps_set_defaults_ss4_v2(psmouse, priv))
2638 return -EIO;
2639
2640 break;
2641 }
2642
2643 return 0;
2644 }
2645
2646 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2647 unsigned char *ec)
2648 {
2649 const struct alps_model_info *model;
2650 int i;
2651
2652 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2653 model = &alps_model_data[i];
2654
2655 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2656 (!model->command_mode_resp ||
2657 model->command_mode_resp == ec[2])) {
2658
2659 return &model->protocol_info;
2660 }
2661 }
2662
2663 return NULL;
2664 }
2665
2666 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2667 {
2668 const struct alps_protocol_info *protocol;
2669 unsigned char e6[4], e7[4], ec[4];
2670 int error;
2671
2672 /*
2673 * First try "E6 report".
2674 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2675 * The bits 0-2 of the first byte will be 1s if some buttons are
2676 * pressed.
2677 */
2678 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2679 PSMOUSE_CMD_SETSCALE11, e6))
2680 return -EIO;
2681
2682 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2683 return -EINVAL;
2684
2685 /*
2686 * Now get the "E7" and "EC" reports. These will uniquely identify
2687 * most ALPS touchpads.
2688 */
2689 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2690 PSMOUSE_CMD_SETSCALE21, e7) ||
2691 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2692 PSMOUSE_CMD_RESET_WRAP, ec) ||
2693 alps_exit_command_mode(psmouse))
2694 return -EIO;
2695
2696 protocol = alps_match_table(e7, ec);
2697 if (!protocol) {
2698 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2699 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2700 protocol = &alps_v5_protocol_data;
2701 } else if (ec[0] == 0x88 &&
2702 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2703 protocol = &alps_v7_protocol_data;
2704 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2705 protocol = &alps_v3_rushmore_data;
2706 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2707 ec[2] >= 0x90 && ec[2] <= 0x9d) {
2708 protocol = &alps_v3_protocol_data;
2709 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2710 e7[2] == 0x14 && ec[1] == 0x02) {
2711 protocol = &alps_v8_protocol_data;
2712 } else {
2713 psmouse_dbg(psmouse,
2714 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2715 return -EINVAL;
2716 }
2717 }
2718
2719 if (priv) {
2720 /* Save the Firmware version */
2721 memcpy(priv->fw_ver, ec, 3);
2722 error = alps_set_protocol(psmouse, priv, protocol);
2723 if (error)
2724 return error;
2725 }
2726
2727 return 0;
2728 }
2729
2730 static int alps_reconnect(struct psmouse *psmouse)
2731 {
2732 struct alps_data *priv = psmouse->private;
2733
2734 psmouse_reset(psmouse);
2735
2736 if (alps_identify(psmouse, priv) < 0)
2737 return -1;
2738
2739 return priv->hw_init(psmouse);
2740 }
2741
2742 static void alps_disconnect(struct psmouse *psmouse)
2743 {
2744 struct alps_data *priv = psmouse->private;
2745
2746 psmouse_reset(psmouse);
2747 del_timer_sync(&priv->timer);
2748 if (priv->dev2)
2749 input_unregister_device(priv->dev2);
2750 if (!IS_ERR_OR_NULL(priv->dev3))
2751 input_unregister_device(priv->dev3);
2752 kfree(priv);
2753 }
2754
2755 static void alps_set_abs_params_st(struct alps_data *priv,
2756 struct input_dev *dev1)
2757 {
2758 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2759 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2760 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2761 }
2762
2763 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2764 struct input_dev *dev1)
2765 {
2766 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2767 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2768
2769 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2770 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2771
2772 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2773 set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2774 }
2775
2776 static void alps_set_abs_params_mt(struct alps_data *priv,
2777 struct input_dev *dev1)
2778 {
2779 alps_set_abs_params_mt_common(priv, dev1);
2780 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2781
2782 input_mt_init_slots(dev1, MAX_TOUCHES,
2783 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2784 INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2785 }
2786
2787 static void alps_set_abs_params_v7(struct alps_data *priv,
2788 struct input_dev *dev1)
2789 {
2790 alps_set_abs_params_mt_common(priv, dev1);
2791 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2792
2793 input_mt_init_slots(dev1, MAX_TOUCHES,
2794 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2795 INPUT_MT_TRACK);
2796
2797 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2798 }
2799
2800 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2801 struct input_dev *dev1)
2802 {
2803 alps_set_abs_params_mt_common(priv, dev1);
2804 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2805 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2806
2807 input_mt_init_slots(dev1, MAX_TOUCHES,
2808 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2809 INPUT_MT_TRACK);
2810 }
2811
2812 int alps_init(struct psmouse *psmouse)
2813 {
2814 struct alps_data *priv = psmouse->private;
2815 struct input_dev *dev1 = psmouse->dev;
2816 int error;
2817
2818 error = priv->hw_init(psmouse);
2819 if (error)
2820 goto init_fail;
2821
2822 /*
2823 * Undo part of setup done for us by psmouse core since touchpad
2824 * is not a relative device.
2825 */
2826 __clear_bit(EV_REL, dev1->evbit);
2827 __clear_bit(REL_X, dev1->relbit);
2828 __clear_bit(REL_Y, dev1->relbit);
2829
2830 /*
2831 * Now set up our capabilities.
2832 */
2833 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2834 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2835 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2836 dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2837 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2838
2839 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2840
2841 priv->set_abs_params(priv, dev1);
2842
2843 if (priv->flags & ALPS_WHEEL) {
2844 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2845 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2846 }
2847
2848 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2849 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2850 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2851 }
2852
2853 if (priv->flags & ALPS_FOUR_BUTTONS) {
2854 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2855 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2856 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2857 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2858 } else if (priv->flags & ALPS_BUTTONPAD) {
2859 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2860 clear_bit(BTN_RIGHT, dev1->keybit);
2861 } else {
2862 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2863 }
2864
2865 if (priv->flags & ALPS_DUALPOINT) {
2866 struct input_dev *dev2;
2867
2868 dev2 = input_allocate_device();
2869 if (!dev2) {
2870 psmouse_err(psmouse,
2871 "failed to allocate trackstick device\n");
2872 error = -ENOMEM;
2873 goto init_fail;
2874 }
2875
2876 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2877 psmouse->ps2dev.serio->phys);
2878 dev2->phys = priv->phys2;
2879
2880 /*
2881 * format of input device name is: "protocol vendor name"
2882 * see function psmouse_switch_protocol() in psmouse-base.c
2883 */
2884 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2885
2886 dev2->id.bustype = BUS_I8042;
2887 dev2->id.vendor = 0x0002;
2888 dev2->id.product = PSMOUSE_ALPS;
2889 dev2->id.version = priv->proto_version;
2890 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2891
2892 input_set_capability(dev2, EV_REL, REL_X);
2893 input_set_capability(dev2, EV_REL, REL_Y);
2894 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2895 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2896 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2897
2898 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2899 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2900
2901 error = input_register_device(dev2);
2902 if (error) {
2903 psmouse_err(psmouse,
2904 "failed to register trackstick device: %d\n",
2905 error);
2906 input_free_device(dev2);
2907 goto init_fail;
2908 }
2909
2910 priv->dev2 = dev2;
2911 }
2912
2913 priv->psmouse = psmouse;
2914
2915 INIT_DELAYED_WORK(&priv->dev3_register_work,
2916 alps_register_bare_ps2_mouse);
2917
2918 psmouse->protocol_handler = alps_process_byte;
2919 psmouse->poll = alps_poll;
2920 psmouse->disconnect = alps_disconnect;
2921 psmouse->reconnect = alps_reconnect;
2922 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2923
2924 /* We are having trouble resyncing ALPS touchpads so disable it for now */
2925 psmouse->resync_time = 0;
2926
2927 /* Allow 2 invalid packets without resetting device */
2928 psmouse->resetafter = psmouse->pktsize * 2;
2929
2930 return 0;
2931
2932 init_fail:
2933 psmouse_reset(psmouse);
2934 /*
2935 * Even though we did not allocate psmouse->private we do free
2936 * it here.
2937 */
2938 kfree(psmouse->private);
2939 psmouse->private = NULL;
2940 return error;
2941 }
2942
2943 int alps_detect(struct psmouse *psmouse, bool set_properties)
2944 {
2945 struct alps_data *priv;
2946 int error;
2947
2948 error = alps_identify(psmouse, NULL);
2949 if (error)
2950 return error;
2951
2952 /*
2953 * Reset the device to make sure it is fully operational:
2954 * on some laptops, like certain Dell Latitudes, we may
2955 * fail to properly detect presence of trackstick if device
2956 * has not been reset.
2957 */
2958 psmouse_reset(psmouse);
2959
2960 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2961 if (!priv)
2962 return -ENOMEM;
2963
2964 error = alps_identify(psmouse, priv);
2965 if (error) {
2966 kfree(priv);
2967 return error;
2968 }
2969
2970 if (set_properties) {
2971 psmouse->vendor = "ALPS";
2972 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2973 "DualPoint TouchPad" : "GlidePoint";
2974 psmouse->model = priv->proto_version;
2975 } else {
2976 /*
2977 * Destroy alps_data structure we allocated earlier since
2978 * this was just a "trial run". Otherwise we'll keep it
2979 * to be used by alps_init() which has to be called if
2980 * we succeed and set_properties is true.
2981 */
2982 kfree(priv);
2983 psmouse->private = NULL;
2984 }
2985
2986 return 0;
2987 }
2988
Ubuntu Focal Linux kernel mirror