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[mirror_ubuntu-zesty-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 alps_report_buttons(dev, dev2, left, right, middle);
255
256 /* Convert hardware tap to a reasonable Z value */
257 if (ges && !fin)
258 z = 40;
259
260 /*
261 * A "tap and drag" operation is reported by the hardware as a transition
262 * from (!fin && ges) to (fin && ges). This should be translated to the
263 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
264 */
265 if (ges && fin && !priv->prev_fin) {
266 input_report_abs(dev, ABS_X, x);
267 input_report_abs(dev, ABS_Y, y);
268 input_report_abs(dev, ABS_PRESSURE, 0);
269 input_report_key(dev, BTN_TOOL_FINGER, 0);
270 input_sync(dev);
271 }
272 priv->prev_fin = fin;
273
274 if (z > 30)
275 input_report_key(dev, BTN_TOUCH, 1);
276 if (z < 25)
277 input_report_key(dev, BTN_TOUCH, 0);
278
279 if (z > 0) {
280 input_report_abs(dev, ABS_X, x);
281 input_report_abs(dev, ABS_Y, y);
282 }
283
284 input_report_abs(dev, ABS_PRESSURE, z);
285 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
286
287 if (priv->flags & ALPS_WHEEL)
288 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
289
290 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
291 input_report_key(dev, BTN_FORWARD, forward);
292 input_report_key(dev, BTN_BACK, back);
293 }
294
295 if (priv->flags & ALPS_FOUR_BUTTONS) {
296 input_report_key(dev, BTN_0, packet[2] & 4);
297 input_report_key(dev, BTN_1, packet[0] & 0x10);
298 input_report_key(dev, BTN_2, packet[3] & 4);
299 input_report_key(dev, BTN_3, packet[0] & 0x20);
300 }
301
302 input_sync(dev);
303 }
304
305 /*
306 * Process bitmap data for V5 protocols. Return value is null.
307 *
308 * The bitmaps don't have enough data to track fingers, so this function
309 * only generates points representing a bounding box of at most two contacts.
310 * These two points are returned in fields->mt.
311 */
312 static void alps_process_bitmap_dolphin(struct alps_data *priv,
313 struct alps_fields *fields)
314 {
315 int box_middle_x, box_middle_y;
316 unsigned int x_map, y_map;
317 unsigned char start_bit, end_bit;
318 unsigned char x_msb, x_lsb, y_msb, y_lsb;
319
320 x_map = fields->x_map;
321 y_map = fields->y_map;
322
323 if (!x_map || !y_map)
324 return;
325
326 /* Get Most-significant and Least-significant bit */
327 x_msb = fls(x_map);
328 x_lsb = ffs(x_map);
329 y_msb = fls(y_map);
330 y_lsb = ffs(y_map);
331
332 /* Most-significant bit should never exceed max sensor line number */
333 if (x_msb > priv->x_bits || y_msb > priv->y_bits)
334 return;
335
336 if (fields->fingers > 1) {
337 start_bit = priv->x_bits - x_msb;
338 end_bit = priv->x_bits - x_lsb;
339 box_middle_x = (priv->x_max * (start_bit + end_bit)) /
340 (2 * (priv->x_bits - 1));
341
342 start_bit = y_lsb - 1;
343 end_bit = y_msb - 1;
344 box_middle_y = (priv->y_max * (start_bit + end_bit)) /
345 (2 * (priv->y_bits - 1));
346 fields->mt[0] = fields->st;
347 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x;
348 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y;
349 }
350 }
351
352 static void alps_get_bitmap_points(unsigned int map,
353 struct alps_bitmap_point *low,
354 struct alps_bitmap_point *high,
355 int *fingers)
356 {
357 struct alps_bitmap_point *point;
358 int i, bit, prev_bit = 0;
359
360 point = low;
361 for (i = 0; map != 0; i++, map >>= 1) {
362 bit = map & 1;
363 if (bit) {
364 if (!prev_bit) {
365 point->start_bit = i;
366 point->num_bits = 0;
367 (*fingers)++;
368 }
369 point->num_bits++;
370 } else {
371 if (prev_bit)
372 point = high;
373 }
374 prev_bit = bit;
375 }
376 }
377
378 /*
379 * Process bitmap data from v3 and v4 protocols. Returns the number of
380 * fingers detected. A return value of 0 means at least one of the
381 * bitmaps was empty.
382 *
383 * The bitmaps don't have enough data to track fingers, so this function
384 * only generates points representing a bounding box of all contacts.
385 * These points are returned in fields->mt when the return value
386 * is greater than 0.
387 */
388 static int alps_process_bitmap(struct alps_data *priv,
389 struct alps_fields *fields)
390 {
391 int i, fingers_x = 0, fingers_y = 0, fingers;
392 struct alps_bitmap_point x_low = {0,}, x_high = {0,};
393 struct alps_bitmap_point y_low = {0,}, y_high = {0,};
394
395 if (!fields->x_map || !fields->y_map)
396 return 0;
397
398 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
399 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
400
401 /*
402 * Fingers can overlap, so we use the maximum count of fingers
403 * on either axis as the finger count.
404 */
405 fingers = max(fingers_x, fingers_y);
406
407 /*
408 * If an axis reports only a single contact, we have overlapping or
409 * adjacent fingers. Divide the single contact between the two points.
410 */
411 if (fingers_x == 1) {
412 i = (x_low.num_bits - 1) / 2;
413 x_low.num_bits = x_low.num_bits - i;
414 x_high.start_bit = x_low.start_bit + i;
415 x_high.num_bits = max(i, 1);
416 }
417 if (fingers_y == 1) {
418 i = (y_low.num_bits - 1) / 2;
419 y_low.num_bits = y_low.num_bits - i;
420 y_high.start_bit = y_low.start_bit + i;
421 y_high.num_bits = max(i, 1);
422 }
423
424 fields->mt[0].x =
425 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
426 (2 * (priv->x_bits - 1));
427 fields->mt[0].y =
428 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
429 (2 * (priv->y_bits - 1));
430
431 fields->mt[1].x =
432 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
433 (2 * (priv->x_bits - 1));
434 fields->mt[1].y =
435 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
436 (2 * (priv->y_bits - 1));
437
438 /* y-bitmap order is reversed, except on rushmore */
439 if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) {
440 fields->mt[0].y = priv->y_max - fields->mt[0].y;
441 fields->mt[1].y = priv->y_max - fields->mt[1].y;
442 }
443
444 return fingers;
445 }
446
447 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
448 {
449 input_mt_slot(dev, slot);
450 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
451 input_report_abs(dev, ABS_MT_POSITION_X, x);
452 input_report_abs(dev, ABS_MT_POSITION_Y, y);
453 }
454
455 static void alps_report_mt_data(struct psmouse *psmouse, int n)
456 {
457 struct alps_data *priv = psmouse->private;
458 struct input_dev *dev = psmouse->dev;
459 struct alps_fields *f = &priv->f;
460 int i, slot[MAX_TOUCHES];
461
462 input_mt_assign_slots(dev, slot, f->mt, n, 0);
463 for (i = 0; i < n; i++)
464 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
465
466 input_mt_sync_frame(dev);
467 }
468
469 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
470 {
471 struct alps_data *priv = psmouse->private;
472 struct input_dev *dev = psmouse->dev;
473 struct alps_fields *f = &priv->f;
474
475 /* Use st data when we don't have mt data */
476 if (fingers < 2) {
477 f->mt[0].x = f->st.x;
478 f->mt[0].y = f->st.y;
479 fingers = f->pressure > 0 ? 1 : 0;
480 }
481
482 alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2);
483
484 input_mt_report_finger_count(dev, fingers);
485
486 input_report_key(dev, BTN_LEFT, f->left);
487 input_report_key(dev, BTN_RIGHT, f->right);
488 input_report_key(dev, BTN_MIDDLE, f->middle);
489
490 input_report_abs(dev, ABS_PRESSURE, f->pressure);
491
492 input_sync(dev);
493 }
494
495 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
496 {
497 struct alps_data *priv = psmouse->private;
498 unsigned char *packet = psmouse->packet;
499 struct input_dev *dev = priv->dev2;
500 int x, y, z, left, right, middle;
501
502 /* It should be a DualPoint when received trackstick packet */
503 if (!(priv->flags & ALPS_DUALPOINT)) {
504 psmouse_warn(psmouse,
505 "Rejected trackstick packet from non DualPoint device");
506 return;
507 }
508
509 /* Sanity check packet */
510 if (!(packet[0] & 0x40)) {
511 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
512 return;
513 }
514
515 /*
516 * There's a special packet that seems to indicate the end
517 * of a stream of trackstick data. Filter these out.
518 */
519 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
520 return;
521
522 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
523 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
524 z = (packet[4] & 0x7c) >> 2;
525
526 /*
527 * The x and y values tend to be quite large, and when used
528 * alone the trackstick is difficult to use. Scale them down
529 * to compensate.
530 */
531 x /= 8;
532 y /= 8;
533
534 input_report_rel(dev, REL_X, x);
535 input_report_rel(dev, REL_Y, -y);
536
537 /*
538 * Most ALPS models report the trackstick buttons in the touchpad
539 * packets, but a few report them here. No reliable way has been
540 * found to differentiate between the models upfront, so we enable
541 * the quirk in response to seeing a button press in the trackstick
542 * packet.
543 */
544 left = packet[3] & 0x01;
545 right = packet[3] & 0x02;
546 middle = packet[3] & 0x04;
547
548 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
549 (left || right || middle))
550 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
551
552 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
553 input_report_key(dev, BTN_LEFT, left);
554 input_report_key(dev, BTN_RIGHT, right);
555 input_report_key(dev, BTN_MIDDLE, middle);
556 }
557
558 input_sync(dev);
559 return;
560 }
561
562 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
563 {
564 f->left = !!(p[3] & 0x01);
565 f->right = !!(p[3] & 0x02);
566 f->middle = !!(p[3] & 0x04);
567
568 f->ts_left = !!(p[3] & 0x10);
569 f->ts_right = !!(p[3] & 0x20);
570 f->ts_middle = !!(p[3] & 0x40);
571 }
572
573 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
574 struct psmouse *psmouse)
575 {
576 f->first_mp = !!(p[4] & 0x40);
577 f->is_mp = !!(p[0] & 0x40);
578
579 f->fingers = (p[5] & 0x3) + 1;
580 f->x_map = ((p[4] & 0x7e) << 8) |
581 ((p[1] & 0x7f) << 2) |
582 ((p[0] & 0x30) >> 4);
583 f->y_map = ((p[3] & 0x70) << 4) |
584 ((p[2] & 0x7f) << 1) |
585 (p[4] & 0x01);
586
587 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
588 ((p[0] & 0x30) >> 4);
589 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
590 f->pressure = p[5] & 0x7f;
591
592 alps_decode_buttons_v3(f, p);
593
594 return 0;
595 }
596
597 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
598 struct psmouse *psmouse)
599 {
600 alps_decode_pinnacle(f, p, psmouse);
601
602 /* Rushmore's packet decode has a bit difference with Pinnacle's */
603 f->is_mp = !!(p[5] & 0x40);
604 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
605 f->x_map |= (p[5] & 0x10) << 11;
606 f->y_map |= (p[5] & 0x20) << 6;
607
608 return 0;
609 }
610
611 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
612 struct psmouse *psmouse)
613 {
614 u64 palm_data = 0;
615 struct alps_data *priv = psmouse->private;
616
617 f->first_mp = !!(p[0] & 0x02);
618 f->is_mp = !!(p[0] & 0x20);
619
620 if (!f->is_mp) {
621 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
622 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
623 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
624 alps_decode_buttons_v3(f, p);
625 } else {
626 f->fingers = ((p[0] & 0x6) >> 1 |
627 (p[0] & 0x10) >> 2);
628
629 palm_data = (p[1] & 0x7f) |
630 ((p[2] & 0x7f) << 7) |
631 ((p[4] & 0x7f) << 14) |
632 ((p[5] & 0x7f) << 21) |
633 ((p[3] & 0x07) << 28) |
634 (((u64)p[3] & 0x70) << 27) |
635 (((u64)p[0] & 0x01) << 34);
636
637 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
638 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
639
640 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
641 f->x_map = (palm_data >> priv->y_bits) &
642 (BIT(priv->x_bits) - 1);
643 }
644
645 return 0;
646 }
647
648 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
649 {
650 struct alps_data *priv = psmouse->private;
651 unsigned char *packet = psmouse->packet;
652 struct input_dev *dev2 = priv->dev2;
653 struct alps_fields *f = &priv->f;
654 int fingers = 0;
655
656 memset(f, 0, sizeof(*f));
657
658 priv->decode_fields(f, packet, psmouse);
659
660 /*
661 * There's no single feature of touchpad position and bitmap packets
662 * that can be used to distinguish between them. We rely on the fact
663 * that a bitmap packet should always follow a position packet with
664 * bit 6 of packet[4] set.
665 */
666 if (priv->multi_packet) {
667 /*
668 * Sometimes a position packet will indicate a multi-packet
669 * sequence, but then what follows is another position
670 * packet. Check for this, and when it happens process the
671 * position packet as usual.
672 */
673 if (f->is_mp) {
674 fingers = f->fingers;
675 if (priv->proto_version == ALPS_PROTO_V3 ||
676 priv->proto_version == ALPS_PROTO_V3_RUSHMORE) {
677 if (alps_process_bitmap(priv, f) == 0)
678 fingers = 0; /* Use st data */
679
680 /* Now process position packet */
681 priv->decode_fields(f, priv->multi_data,
682 psmouse);
683 } else {
684 /*
685 * Because Dolphin uses position packet's
686 * coordinate data as Pt1 and uses it to
687 * calculate Pt2, so we need to do position
688 * packet decode first.
689 */
690 priv->decode_fields(f, priv->multi_data,
691 psmouse);
692
693 /*
694 * Since Dolphin's finger number is reliable,
695 * there is no need to compare with bmap_fn.
696 */
697 alps_process_bitmap_dolphin(priv, f);
698 }
699 } else {
700 priv->multi_packet = 0;
701 }
702 }
703
704 /*
705 * Bit 6 of byte 0 is not usually set in position packets. The only
706 * times it seems to be set is in situations where the data is
707 * suspect anyway, e.g. a palm resting flat on the touchpad. Given
708 * this combined with the fact that this bit is useful for filtering
709 * out misidentified bitmap packets, we reject anything with this
710 * bit set.
711 */
712 if (f->is_mp)
713 return;
714
715 if (!priv->multi_packet && f->first_mp) {
716 priv->multi_packet = 1;
717 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
718 return;
719 }
720
721 priv->multi_packet = 0;
722
723 /*
724 * Sometimes the hardware sends a single packet with z = 0
725 * in the middle of a stream. Real releases generate packets
726 * with x, y, and z all zero, so these seem to be flukes.
727 * Ignore them.
728 */
729 if (f->st.x && f->st.y && !f->pressure)
730 return;
731
732 alps_report_semi_mt_data(psmouse, fingers);
733
734 if ((priv->flags & ALPS_DUALPOINT) &&
735 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
736 input_report_key(dev2, BTN_LEFT, f->ts_left);
737 input_report_key(dev2, BTN_RIGHT, f->ts_right);
738 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
739 input_sync(dev2);
740 }
741 }
742
743 static void alps_process_packet_v3(struct psmouse *psmouse)
744 {
745 unsigned char *packet = psmouse->packet;
746
747 /*
748 * v3 protocol packets come in three types, two representing
749 * touchpad data and one representing trackstick data.
750 * Trackstick packets seem to be distinguished by always
751 * having 0x3f in the last byte. This value has never been
752 * observed in the last byte of either of the other types
753 * of packets.
754 */
755 if (packet[5] == 0x3f) {
756 alps_process_trackstick_packet_v3(psmouse);
757 return;
758 }
759
760 alps_process_touchpad_packet_v3_v5(psmouse);
761 }
762
763 static void alps_process_packet_v6(struct psmouse *psmouse)
764 {
765 struct alps_data *priv = psmouse->private;
766 unsigned char *packet = psmouse->packet;
767 struct input_dev *dev = psmouse->dev;
768 struct input_dev *dev2 = priv->dev2;
769 int x, y, z, left, right, middle;
770
771 /*
772 * We can use Byte5 to distinguish if the packet is from Touchpad
773 * or Trackpoint.
774 * Touchpad: 0 - 0x7E
775 * Trackpoint: 0x7F
776 */
777 if (packet[5] == 0x7F) {
778 /* It should be a DualPoint when received Trackpoint packet */
779 if (!(priv->flags & ALPS_DUALPOINT)) {
780 psmouse_warn(psmouse,
781 "Rejected trackstick packet from non DualPoint device");
782 return;
783 }
784
785 /* Trackpoint packet */
786 x = packet[1] | ((packet[3] & 0x20) << 2);
787 y = packet[2] | ((packet[3] & 0x40) << 1);
788 z = packet[4];
789 left = packet[3] & 0x01;
790 right = packet[3] & 0x02;
791 middle = packet[3] & 0x04;
792
793 /* To prevent the cursor jump when finger lifted */
794 if (x == 0x7F && y == 0x7F && z == 0x7F)
795 x = y = z = 0;
796
797 /* Divide 4 since trackpoint's speed is too fast */
798 input_report_rel(dev2, REL_X, (char)x / 4);
799 input_report_rel(dev2, REL_Y, -((char)y / 4));
800
801 input_report_key(dev2, BTN_LEFT, left);
802 input_report_key(dev2, BTN_RIGHT, right);
803 input_report_key(dev2, BTN_MIDDLE, middle);
804
805 input_sync(dev2);
806 return;
807 }
808
809 /* Touchpad packet */
810 x = packet[1] | ((packet[3] & 0x78) << 4);
811 y = packet[2] | ((packet[4] & 0x78) << 4);
812 z = packet[5];
813 left = packet[3] & 0x01;
814 right = packet[3] & 0x02;
815
816 if (z > 30)
817 input_report_key(dev, BTN_TOUCH, 1);
818 if (z < 25)
819 input_report_key(dev, BTN_TOUCH, 0);
820
821 if (z > 0) {
822 input_report_abs(dev, ABS_X, x);
823 input_report_abs(dev, ABS_Y, y);
824 }
825
826 input_report_abs(dev, ABS_PRESSURE, z);
827 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
828
829 /* v6 touchpad does not have middle button */
830 input_report_key(dev, BTN_LEFT, left);
831 input_report_key(dev, BTN_RIGHT, right);
832
833 input_sync(dev);
834 }
835
836 static void alps_process_packet_v4(struct psmouse *psmouse)
837 {
838 struct alps_data *priv = psmouse->private;
839 unsigned char *packet = psmouse->packet;
840 struct alps_fields *f = &priv->f;
841 int offset;
842
843 /*
844 * v4 has a 6-byte encoding for bitmap data, but this data is
845 * broken up between 3 normal packets. Use priv->multi_packet to
846 * track our position in the bitmap packet.
847 */
848 if (packet[6] & 0x40) {
849 /* sync, reset position */
850 priv->multi_packet = 0;
851 }
852
853 if (WARN_ON_ONCE(priv->multi_packet > 2))
854 return;
855
856 offset = 2 * priv->multi_packet;
857 priv->multi_data[offset] = packet[6];
858 priv->multi_data[offset + 1] = packet[7];
859
860 if (++priv->multi_packet > 2) {
861 priv->multi_packet = 0;
862
863 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
864 ((priv->multi_data[3] & 0x60) << 3) |
865 ((priv->multi_data[0] & 0x3f) << 2) |
866 ((priv->multi_data[1] & 0x60) >> 5);
867 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
868 ((priv->multi_data[3] & 0x1f) << 5) |
869 (priv->multi_data[1] & 0x1f);
870
871 f->fingers = alps_process_bitmap(priv, f);
872 }
873
874 f->left = !!(packet[4] & 0x01);
875 f->right = !!(packet[4] & 0x02);
876
877 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
878 ((packet[0] & 0x30) >> 4);
879 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
880 f->pressure = packet[5] & 0x7f;
881
882 alps_report_semi_mt_data(psmouse, f->fingers);
883 }
884
885 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
886 {
887 switch (psmouse->pktcnt) {
888 case 3:
889 return (psmouse->packet[2] & 0x40) == 0x40;
890 case 4:
891 return (psmouse->packet[3] & 0x48) == 0x48;
892 case 6:
893 return (psmouse->packet[5] & 0x40) == 0x00;
894 }
895 return true;
896 }
897
898 static unsigned char alps_get_packet_id_v7(char *byte)
899 {
900 unsigned char packet_id;
901
902 if (byte[4] & 0x40)
903 packet_id = V7_PACKET_ID_TWO;
904 else if (byte[4] & 0x01)
905 packet_id = V7_PACKET_ID_MULTI;
906 else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
907 packet_id = V7_PACKET_ID_NEW;
908 else if (byte[1] == 0x00 && byte[4] == 0x00)
909 packet_id = V7_PACKET_ID_IDLE;
910 else
911 packet_id = V7_PACKET_ID_UNKNOWN;
912
913 return packet_id;
914 }
915
916 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
917 unsigned char *pkt,
918 unsigned char pkt_id)
919 {
920 mt[0].x = ((pkt[2] & 0x80) << 4);
921 mt[0].x |= ((pkt[2] & 0x3F) << 5);
922 mt[0].x |= ((pkt[3] & 0x30) >> 1);
923 mt[0].x |= (pkt[3] & 0x07);
924 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
925
926 mt[1].x = ((pkt[3] & 0x80) << 4);
927 mt[1].x |= ((pkt[4] & 0x80) << 3);
928 mt[1].x |= ((pkt[4] & 0x3F) << 4);
929 mt[1].y = ((pkt[5] & 0x80) << 3);
930 mt[1].y |= ((pkt[5] & 0x3F) << 4);
931
932 switch (pkt_id) {
933 case V7_PACKET_ID_TWO:
934 mt[1].x &= ~0x000F;
935 mt[1].y |= 0x000F;
936 break;
937
938 case V7_PACKET_ID_MULTI:
939 mt[1].x &= ~0x003F;
940 mt[1].y &= ~0x0020;
941 mt[1].y |= ((pkt[4] & 0x02) << 4);
942 mt[1].y |= 0x001F;
943 break;
944
945 case V7_PACKET_ID_NEW:
946 mt[1].x &= ~0x003F;
947 mt[1].x |= (pkt[0] & 0x20);
948 mt[1].y |= 0x000F;
949 break;
950 }
951
952 mt[0].y = 0x7FF - mt[0].y;
953 mt[1].y = 0x7FF - mt[1].y;
954 }
955
956 static int alps_get_mt_count(struct input_mt_pos *mt)
957 {
958 int i, fingers = 0;
959
960 for (i = 0; i < MAX_TOUCHES; i++) {
961 if (mt[i].x != 0 || mt[i].y != 0)
962 fingers++;
963 }
964
965 return fingers;
966 }
967
968 static int alps_decode_packet_v7(struct alps_fields *f,
969 unsigned char *p,
970 struct psmouse *psmouse)
971 {
972 struct alps_data *priv = psmouse->private;
973 unsigned char pkt_id;
974
975 pkt_id = alps_get_packet_id_v7(p);
976 if (pkt_id == V7_PACKET_ID_IDLE)
977 return 0;
978 if (pkt_id == V7_PACKET_ID_UNKNOWN)
979 return -1;
980 /*
981 * NEW packets are send to indicate a discontinuity in the finger
982 * coordinate reporting. Specifically a finger may have moved from
983 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
984 * us.
985 *
986 * NEW packets have 3 problems:
987 * 1) They do not contain middle / right button info (on non clickpads)
988 * this can be worked around by preserving the old button state
989 * 2) They do not contain an accurate fingercount, and they are
990 * typically send when the number of fingers changes. We cannot use
991 * the old finger count as that may mismatch with the amount of
992 * touch coordinates we've available in the NEW packet
993 * 3) Their x data for the second touch is inaccurate leading to
994 * a possible jump of the x coordinate by 16 units when the first
995 * non NEW packet comes in
996 * Since problems 2 & 3 cannot be worked around, just ignore them.
997 */
998 if (pkt_id == V7_PACKET_ID_NEW)
999 return 1;
1000
1001 alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1002
1003 if (pkt_id == V7_PACKET_ID_TWO)
1004 f->fingers = alps_get_mt_count(f->mt);
1005 else /* pkt_id == V7_PACKET_ID_MULTI */
1006 f->fingers = 3 + (p[5] & 0x03);
1007
1008 f->left = (p[0] & 0x80) >> 7;
1009 if (priv->flags & ALPS_BUTTONPAD) {
1010 if (p[0] & 0x20)
1011 f->fingers++;
1012 if (p[0] & 0x10)
1013 f->fingers++;
1014 } else {
1015 f->right = (p[0] & 0x20) >> 5;
1016 f->middle = (p[0] & 0x10) >> 4;
1017 }
1018
1019 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1020 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1021 f->mt[0].x = f->mt[1].x;
1022 f->mt[0].y = f->mt[1].y;
1023 f->mt[1].x = 0;
1024 f->mt[1].y = 0;
1025 }
1026
1027 return 0;
1028 }
1029
1030 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1031 {
1032 struct alps_data *priv = psmouse->private;
1033 unsigned char *packet = psmouse->packet;
1034 struct input_dev *dev2 = priv->dev2;
1035 int x, y, z, left, right, middle;
1036
1037 /* It should be a DualPoint when received trackstick packet */
1038 if (!(priv->flags & ALPS_DUALPOINT)) {
1039 psmouse_warn(psmouse,
1040 "Rejected trackstick packet from non DualPoint device");
1041 return;
1042 }
1043
1044 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1045 y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1046 ((packet[3] & 0x20) << 1);
1047 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1048
1049 left = (packet[1] & 0x01);
1050 right = (packet[1] & 0x02) >> 1;
1051 middle = (packet[1] & 0x04) >> 2;
1052
1053 /* Divide 2 since trackpoint's speed is too fast */
1054 input_report_rel(dev2, REL_X, (char)x / 2);
1055 input_report_rel(dev2, REL_Y, -((char)y / 2));
1056
1057 input_report_key(dev2, BTN_LEFT, left);
1058 input_report_key(dev2, BTN_RIGHT, right);
1059 input_report_key(dev2, BTN_MIDDLE, middle);
1060
1061 input_sync(dev2);
1062 }
1063
1064 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1065 {
1066 struct alps_data *priv = psmouse->private;
1067 struct input_dev *dev = psmouse->dev;
1068 struct alps_fields *f = &priv->f;
1069
1070 memset(f, 0, sizeof(*f));
1071
1072 if (priv->decode_fields(f, psmouse->packet, psmouse))
1073 return;
1074
1075 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1076
1077 input_mt_report_finger_count(dev, f->fingers);
1078
1079 input_report_key(dev, BTN_LEFT, f->left);
1080 input_report_key(dev, BTN_RIGHT, f->right);
1081 input_report_key(dev, BTN_MIDDLE, f->middle);
1082
1083 input_sync(dev);
1084 }
1085
1086 static void alps_process_packet_v7(struct psmouse *psmouse)
1087 {
1088 unsigned char *packet = psmouse->packet;
1089
1090 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1091 alps_process_trackstick_packet_v7(psmouse);
1092 else
1093 alps_process_touchpad_packet_v7(psmouse);
1094 }
1095
1096 unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte)
1097 {
1098 unsigned char pkt_id = SS4_PACKET_ID_IDLE;
1099
1100 if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 &&
1101 (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) {
1102 pkt_id = SS4_PACKET_ID_IDLE;
1103 } else if (!(byte[3] & 0x10)) {
1104 pkt_id = SS4_PACKET_ID_ONE;
1105 } else if (!(byte[3] & 0x20)) {
1106 pkt_id = SS4_PACKET_ID_TWO;
1107 } else {
1108 pkt_id = SS4_PACKET_ID_MULTI;
1109 }
1110
1111 return pkt_id;
1112 }
1113
1114 static int alps_decode_ss4_v2(struct alps_fields *f,
1115 unsigned char *p, struct psmouse *psmouse)
1116 {
1117 struct alps_data *priv = psmouse->private;
1118 unsigned char pkt_id;
1119 unsigned int no_data_x, no_data_y;
1120
1121 pkt_id = alps_get_pkt_id_ss4_v2(p);
1122
1123 /* Current packet is 1Finger coordinate packet */
1124 switch (pkt_id) {
1125 case SS4_PACKET_ID_ONE:
1126 f->mt[0].x = SS4_1F_X_V2(p);
1127 f->mt[0].y = SS4_1F_Y_V2(p);
1128 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1129 f->fingers = 1;
1130 f->first_mp = 0;
1131 f->is_mp = 0;
1132 break;
1133
1134 case SS4_PACKET_ID_TWO:
1135 if (priv->flags & ALPS_BUTTONPAD) {
1136 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1137 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1138 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1139 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1140 } else {
1141 f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1142 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1143 f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1144 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1145 }
1146 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1147
1148 if (SS4_IS_MF_CONTINUE(p)) {
1149 f->first_mp = 1;
1150 } else {
1151 f->fingers = 2;
1152 f->first_mp = 0;
1153 }
1154 f->is_mp = 0;
1155
1156 break;
1157
1158 case SS4_PACKET_ID_MULTI:
1159 if (priv->flags & ALPS_BUTTONPAD) {
1160 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1161 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1162 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1163 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1164 no_data_x = SS4_MFPACKET_NO_AX_BL;
1165 no_data_y = SS4_MFPACKET_NO_AY_BL;
1166 } else {
1167 f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1168 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1169 f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1170 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1171 no_data_x = SS4_MFPACKET_NO_AX;
1172 no_data_y = SS4_MFPACKET_NO_AY;
1173 }
1174
1175 f->first_mp = 0;
1176 f->is_mp = 1;
1177
1178 if (SS4_IS_5F_DETECTED(p)) {
1179 f->fingers = 5;
1180 } else if (f->mt[3].x == no_data_x &&
1181 f->mt[3].y == no_data_y) {
1182 f->mt[3].x = 0;
1183 f->mt[3].y = 0;
1184 f->fingers = 3;
1185 } else {
1186 f->fingers = 4;
1187 }
1188 break;
1189
1190 case SS4_PACKET_ID_IDLE:
1191 default:
1192 memset(f, 0, sizeof(struct alps_fields));
1193 break;
1194 }
1195
1196 f->left = !!(SS4_BTN_V2(p) & 0x01);
1197 if (!(priv->flags & ALPS_BUTTONPAD)) {
1198 f->right = !!(SS4_BTN_V2(p) & 0x02);
1199 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1200 }
1201
1202 return 0;
1203 }
1204
1205 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1206 {
1207 struct alps_data *priv = psmouse->private;
1208 unsigned char *packet = psmouse->packet;
1209 struct input_dev *dev = psmouse->dev;
1210 struct alps_fields *f = &priv->f;
1211
1212 memset(f, 0, sizeof(struct alps_fields));
1213 priv->decode_fields(f, packet, psmouse);
1214 if (priv->multi_packet) {
1215 /*
1216 * Sometimes the first packet will indicate a multi-packet
1217 * sequence, but sometimes the next multi-packet would not
1218 * come. Check for this, and when it happens process the
1219 * position packet as usual.
1220 */
1221 if (f->is_mp) {
1222 /* Now process the 1st packet */
1223 priv->decode_fields(f, priv->multi_data, psmouse);
1224 } else {
1225 priv->multi_packet = 0;
1226 }
1227 }
1228
1229 /*
1230 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1231 * When it is set, it means 2nd packet comes without 1st packet come.
1232 */
1233 if (f->is_mp)
1234 return;
1235
1236 /* Save the first packet */
1237 if (!priv->multi_packet && f->first_mp) {
1238 priv->multi_packet = 1;
1239 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1240 return;
1241 }
1242
1243 priv->multi_packet = 0;
1244
1245 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1246
1247 input_mt_report_finger_count(dev, f->fingers);
1248
1249 input_report_key(dev, BTN_LEFT, f->left);
1250 input_report_key(dev, BTN_RIGHT, f->right);
1251 input_report_key(dev, BTN_MIDDLE, f->middle);
1252
1253 input_report_abs(dev, ABS_PRESSURE, f->pressure);
1254 input_sync(dev);
1255 }
1256
1257 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1258 {
1259 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1260 return false;
1261 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1262 return false;
1263 return true;
1264 }
1265
1266 static DEFINE_MUTEX(alps_mutex);
1267
1268 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1269 {
1270 struct alps_data *priv =
1271 container_of(work, struct alps_data, dev3_register_work.work);
1272 struct psmouse *psmouse = priv->psmouse;
1273 struct input_dev *dev3;
1274 int error = 0;
1275
1276 mutex_lock(&alps_mutex);
1277
1278 if (priv->dev3)
1279 goto out;
1280
1281 dev3 = input_allocate_device();
1282 if (!dev3) {
1283 psmouse_err(psmouse, "failed to allocate secondary device\n");
1284 error = -ENOMEM;
1285 goto out;
1286 }
1287
1288 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1289 psmouse->ps2dev.serio->phys,
1290 (priv->dev2 ? "input2" : "input1"));
1291 dev3->phys = priv->phys3;
1292
1293 /*
1294 * format of input device name is: "protocol vendor name"
1295 * see function psmouse_switch_protocol() in psmouse-base.c
1296 */
1297 dev3->name = "PS/2 ALPS Mouse";
1298
1299 dev3->id.bustype = BUS_I8042;
1300 dev3->id.vendor = 0x0002;
1301 dev3->id.product = PSMOUSE_PS2;
1302 dev3->id.version = 0x0000;
1303 dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1304
1305 input_set_capability(dev3, EV_REL, REL_X);
1306 input_set_capability(dev3, EV_REL, REL_Y);
1307 input_set_capability(dev3, EV_KEY, BTN_LEFT);
1308 input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1309 input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1310
1311 __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1312
1313 error = input_register_device(dev3);
1314 if (error) {
1315 psmouse_err(psmouse,
1316 "failed to register secondary device: %d\n",
1317 error);
1318 input_free_device(dev3);
1319 goto out;
1320 }
1321
1322 priv->dev3 = dev3;
1323
1324 out:
1325 /*
1326 * Save the error code so that we can detect that we
1327 * already tried to create the device.
1328 */
1329 if (error)
1330 priv->dev3 = ERR_PTR(error);
1331
1332 mutex_unlock(&alps_mutex);
1333 }
1334
1335 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1336 unsigned char packet[],
1337 bool report_buttons)
1338 {
1339 struct alps_data *priv = psmouse->private;
1340 struct input_dev *dev;
1341
1342 /* Figure out which device to use to report the bare packet */
1343 if (priv->proto_version == ALPS_PROTO_V2 &&
1344 (priv->flags & ALPS_DUALPOINT)) {
1345 /* On V2 devices the DualPoint Stick reports bare packets */
1346 dev = priv->dev2;
1347 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1348 /* Register dev3 mouse if we received PS/2 packet first time */
1349 if (!IS_ERR(priv->dev3))
1350 psmouse_queue_work(psmouse, &priv->dev3_register_work,
1351 0);
1352 return;
1353 } else {
1354 dev = priv->dev3;
1355 }
1356
1357 if (report_buttons)
1358 alps_report_buttons(dev, NULL,
1359 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1360
1361 input_report_rel(dev, REL_X,
1362 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
1363 input_report_rel(dev, REL_Y,
1364 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
1365
1366 input_sync(dev);
1367 }
1368
1369 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1370 {
1371 struct alps_data *priv = psmouse->private;
1372
1373 if (psmouse->pktcnt < 6)
1374 return PSMOUSE_GOOD_DATA;
1375
1376 if (psmouse->pktcnt == 6) {
1377 /*
1378 * Start a timer to flush the packet if it ends up last
1379 * 6-byte packet in the stream. Timer needs to fire
1380 * psmouse core times out itself. 20 ms should be enough
1381 * to decide if we are getting more data or not.
1382 */
1383 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1384 return PSMOUSE_GOOD_DATA;
1385 }
1386
1387 del_timer(&priv->timer);
1388
1389 if (psmouse->packet[6] & 0x80) {
1390
1391 /*
1392 * Highest bit is set - that means we either had
1393 * complete ALPS packet and this is start of the
1394 * next packet or we got garbage.
1395 */
1396
1397 if (((psmouse->packet[3] |
1398 psmouse->packet[4] |
1399 psmouse->packet[5]) & 0x80) ||
1400 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1401 psmouse_dbg(psmouse,
1402 "refusing packet %4ph (suspected interleaved ps/2)\n",
1403 psmouse->packet + 3);
1404 return PSMOUSE_BAD_DATA;
1405 }
1406
1407 priv->process_packet(psmouse);
1408
1409 /* Continue with the next packet */
1410 psmouse->packet[0] = psmouse->packet[6];
1411 psmouse->pktcnt = 1;
1412
1413 } else {
1414
1415 /*
1416 * High bit is 0 - that means that we indeed got a PS/2
1417 * packet in the middle of ALPS packet.
1418 *
1419 * There is also possibility that we got 6-byte ALPS
1420 * packet followed by 3-byte packet from trackpoint. We
1421 * can not distinguish between these 2 scenarios but
1422 * because the latter is unlikely to happen in course of
1423 * normal operation (user would need to press all
1424 * buttons on the pad and start moving trackpoint
1425 * without touching the pad surface) we assume former.
1426 * Even if we are wrong the wost thing that would happen
1427 * the cursor would jump but we should not get protocol
1428 * de-synchronization.
1429 */
1430
1431 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1432 false);
1433
1434 /*
1435 * Continue with the standard ALPS protocol handling,
1436 * but make sure we won't process it as an interleaved
1437 * packet again, which may happen if all buttons are
1438 * pressed. To avoid this let's reset the 4th bit which
1439 * is normally 1.
1440 */
1441 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1442 psmouse->pktcnt = 4;
1443 }
1444
1445 return PSMOUSE_GOOD_DATA;
1446 }
1447
1448 static void alps_flush_packet(unsigned long data)
1449 {
1450 struct psmouse *psmouse = (struct psmouse *)data;
1451 struct alps_data *priv = psmouse->private;
1452
1453 serio_pause_rx(psmouse->ps2dev.serio);
1454
1455 if (psmouse->pktcnt == psmouse->pktsize) {
1456
1457 /*
1458 * We did not any more data in reasonable amount of time.
1459 * Validate the last 3 bytes and process as a standard
1460 * ALPS packet.
1461 */
1462 if ((psmouse->packet[3] |
1463 psmouse->packet[4] |
1464 psmouse->packet[5]) & 0x80) {
1465 psmouse_dbg(psmouse,
1466 "refusing packet %3ph (suspected interleaved ps/2)\n",
1467 psmouse->packet + 3);
1468 } else {
1469 priv->process_packet(psmouse);
1470 }
1471 psmouse->pktcnt = 0;
1472 }
1473
1474 serio_continue_rx(psmouse->ps2dev.serio);
1475 }
1476
1477 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1478 {
1479 struct alps_data *priv = psmouse->private;
1480
1481 /*
1482 * Check if we are dealing with a bare PS/2 packet, presumably from
1483 * a device connected to the external PS/2 port. Because bare PS/2
1484 * protocol does not have enough constant bits to self-synchronize
1485 * properly we only do this if the device is fully synchronized.
1486 * Can not distinguish V8's first byte from PS/2 packet's
1487 */
1488 if (priv->proto_version != ALPS_PROTO_V8 &&
1489 !psmouse->out_of_sync_cnt &&
1490 (psmouse->packet[0] & 0xc8) == 0x08) {
1491
1492 if (psmouse->pktcnt == 3) {
1493 alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1494 true);
1495 return PSMOUSE_FULL_PACKET;
1496 }
1497 return PSMOUSE_GOOD_DATA;
1498 }
1499
1500 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1501
1502 if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1503 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1504 return alps_handle_interleaved_ps2(psmouse);
1505 }
1506
1507 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1508 psmouse_dbg(psmouse,
1509 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1510 psmouse->packet[0], priv->mask0, priv->byte0);
1511 return PSMOUSE_BAD_DATA;
1512 }
1513
1514 /* Bytes 2 - pktsize should have 0 in the highest bit */
1515 if (priv->proto_version < ALPS_PROTO_V5 &&
1516 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1517 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1518 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1519 psmouse->pktcnt - 1,
1520 psmouse->packet[psmouse->pktcnt - 1]);
1521
1522 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1523 psmouse->pktcnt == psmouse->pktsize) {
1524 /*
1525 * Some Dell boxes, such as Latitude E6440 or E7440
1526 * with closed lid, quite often smash last byte of
1527 * otherwise valid packet with 0xff. Given that the
1528 * next packet is very likely to be valid let's
1529 * report PSMOUSE_FULL_PACKET but not process data,
1530 * rather than reporting PSMOUSE_BAD_DATA and
1531 * filling the logs.
1532 */
1533 return PSMOUSE_FULL_PACKET;
1534 }
1535
1536 return PSMOUSE_BAD_DATA;
1537 }
1538
1539 if ((priv->proto_version == ALPS_PROTO_V7 &&
1540 !alps_is_valid_package_v7(psmouse)) ||
1541 (priv->proto_version == ALPS_PROTO_V8 &&
1542 !alps_is_valid_package_ss4_v2(psmouse))) {
1543 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1544 psmouse->pktcnt - 1,
1545 psmouse->packet[psmouse->pktcnt - 1]);
1546 return PSMOUSE_BAD_DATA;
1547 }
1548
1549 if (psmouse->pktcnt == psmouse->pktsize) {
1550 priv->process_packet(psmouse);
1551 return PSMOUSE_FULL_PACKET;
1552 }
1553
1554 return PSMOUSE_GOOD_DATA;
1555 }
1556
1557 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1558 {
1559 struct ps2dev *ps2dev = &psmouse->ps2dev;
1560 struct alps_data *priv = psmouse->private;
1561 int command;
1562 unsigned char *param;
1563 unsigned char dummy[4];
1564
1565 BUG_ON(nibble > 0xf);
1566
1567 command = priv->nibble_commands[nibble].command;
1568 param = (command & 0x0f00) ?
1569 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1570
1571 if (ps2_command(ps2dev, param, command))
1572 return -1;
1573
1574 return 0;
1575 }
1576
1577 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1578 {
1579 struct ps2dev *ps2dev = &psmouse->ps2dev;
1580 struct alps_data *priv = psmouse->private;
1581 int i, nibble;
1582
1583 if (ps2_command(ps2dev, NULL, priv->addr_command))
1584 return -1;
1585
1586 for (i = 12; i >= 0; i -= 4) {
1587 nibble = (addr >> i) & 0xf;
1588 if (alps_command_mode_send_nibble(psmouse, nibble))
1589 return -1;
1590 }
1591
1592 return 0;
1593 }
1594
1595 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1596 {
1597 struct ps2dev *ps2dev = &psmouse->ps2dev;
1598 unsigned char param[4];
1599
1600 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1601 return -1;
1602
1603 /*
1604 * The address being read is returned in the first two bytes
1605 * of the result. Check that this address matches the expected
1606 * address.
1607 */
1608 if (addr != ((param[0] << 8) | param[1]))
1609 return -1;
1610
1611 return param[2];
1612 }
1613
1614 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1615 {
1616 if (alps_command_mode_set_addr(psmouse, addr))
1617 return -1;
1618 return __alps_command_mode_read_reg(psmouse, addr);
1619 }
1620
1621 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1622 {
1623 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1624 return -1;
1625 if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1626 return -1;
1627 return 0;
1628 }
1629
1630 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1631 u8 value)
1632 {
1633 if (alps_command_mode_set_addr(psmouse, addr))
1634 return -1;
1635 return __alps_command_mode_write_reg(psmouse, value);
1636 }
1637
1638 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1639 int repeated_command, unsigned char *param)
1640 {
1641 struct ps2dev *ps2dev = &psmouse->ps2dev;
1642
1643 param[0] = 0;
1644 if (init_command && ps2_command(ps2dev, param, init_command))
1645 return -EIO;
1646
1647 if (ps2_command(ps2dev, NULL, repeated_command) ||
1648 ps2_command(ps2dev, NULL, repeated_command) ||
1649 ps2_command(ps2dev, NULL, repeated_command))
1650 return -EIO;
1651
1652 param[0] = param[1] = param[2] = 0xff;
1653 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1654 return -EIO;
1655
1656 psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1657 repeated_command, param);
1658 return 0;
1659 }
1660
1661 static bool alps_check_valid_firmware_id(unsigned char id[])
1662 {
1663 if (id[0] == 0x73)
1664 return true;
1665
1666 if (id[0] == 0x88 &&
1667 (id[1] == 0x07 ||
1668 id[1] == 0x08 ||
1669 (id[1] & 0xf0) == 0xb0 ||
1670 (id[1] & 0xf0) == 0xc0)) {
1671 return true;
1672 }
1673
1674 return false;
1675 }
1676
1677 static int alps_enter_command_mode(struct psmouse *psmouse)
1678 {
1679 unsigned char param[4];
1680
1681 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1682 psmouse_err(psmouse, "failed to enter command mode\n");
1683 return -1;
1684 }
1685
1686 if (!alps_check_valid_firmware_id(param)) {
1687 psmouse_dbg(psmouse,
1688 "unknown response while entering command mode\n");
1689 return -1;
1690 }
1691 return 0;
1692 }
1693
1694 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1695 {
1696 struct ps2dev *ps2dev = &psmouse->ps2dev;
1697 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1698 return -1;
1699 return 0;
1700 }
1701
1702 /*
1703 * For DualPoint devices select the device that should respond to
1704 * subsequent commands. It looks like glidepad is behind stickpointer,
1705 * I'd thought it would be other way around...
1706 */
1707 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1708 {
1709 struct ps2dev *ps2dev = &psmouse->ps2dev;
1710 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1711
1712 if (ps2_command(ps2dev, NULL, cmd) ||
1713 ps2_command(ps2dev, NULL, cmd) ||
1714 ps2_command(ps2dev, NULL, cmd) ||
1715 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1716 return -1;
1717
1718 /* we may get 3 more bytes, just ignore them */
1719 ps2_drain(ps2dev, 3, 100);
1720
1721 return 0;
1722 }
1723
1724 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1725 {
1726 struct ps2dev *ps2dev = &psmouse->ps2dev;
1727
1728 /* Try ALPS magic knock - 4 disable before enable */
1729 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1730 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1731 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1732 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1733 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1734 return -1;
1735
1736 /*
1737 * Switch mouse to poll (remote) mode so motion data will not
1738 * get in our way
1739 */
1740 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1741 }
1742
1743 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1744 {
1745 int i, nibble;
1746
1747 /*
1748 * b0-b11 are valid bits, send sequence is inverse.
1749 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1750 */
1751 for (i = 0; i <= 8; i += 4) {
1752 nibble = (word >> i) & 0xf;
1753 if (alps_command_mode_send_nibble(psmouse, nibble))
1754 return -1;
1755 }
1756
1757 return 0;
1758 }
1759
1760 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1761 u16 addr, u16 value)
1762 {
1763 struct ps2dev *ps2dev = &psmouse->ps2dev;
1764
1765 /* 0x0A0 is the command to write the word */
1766 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1767 alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1768 alps_monitor_mode_send_word(psmouse, addr) ||
1769 alps_monitor_mode_send_word(psmouse, value) ||
1770 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1771 return -1;
1772
1773 return 0;
1774 }
1775
1776 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1777 {
1778 struct ps2dev *ps2dev = &psmouse->ps2dev;
1779
1780 if (enable) {
1781 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1782 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1783 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1784 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1785 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1786 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1787 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1788 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1789 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1790 return -1;
1791 } else {
1792 /* EC to exit monitor mode */
1793 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1794 return -1;
1795 }
1796
1797 return 0;
1798 }
1799
1800 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1801 {
1802 u16 reg_val = 0x181;
1803 int ret = -1;
1804
1805 /* enter monitor mode, to write the register */
1806 if (alps_monitor_mode(psmouse, true))
1807 return -1;
1808
1809 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1810
1811 if (alps_monitor_mode(psmouse, false))
1812 ret = -1;
1813
1814 return ret;
1815 }
1816
1817 static int alps_get_status(struct psmouse *psmouse, char *param)
1818 {
1819 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1820 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1821 return -1;
1822
1823 return 0;
1824 }
1825
1826 /*
1827 * Turn touchpad tapping on or off. The sequences are:
1828 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1829 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1830 * My guess that 0xE9 (GetInfo) is here as a sync point.
1831 * For models that also have stickpointer (DualPoints) its tapping
1832 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1833 * we don't fiddle with it.
1834 */
1835 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1836 {
1837 struct ps2dev *ps2dev = &psmouse->ps2dev;
1838 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1839 unsigned char tap_arg = enable ? 0x0A : 0x00;
1840 unsigned char param[4];
1841
1842 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1843 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1844 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1845 ps2_command(ps2dev, &tap_arg, cmd))
1846 return -1;
1847
1848 if (alps_get_status(psmouse, param))
1849 return -1;
1850
1851 return 0;
1852 }
1853
1854 /*
1855 * alps_poll() - poll the touchpad for current motion packet.
1856 * Used in resync.
1857 */
1858 static int alps_poll(struct psmouse *psmouse)
1859 {
1860 struct alps_data *priv = psmouse->private;
1861 unsigned char buf[sizeof(psmouse->packet)];
1862 bool poll_failed;
1863
1864 if (priv->flags & ALPS_PASS)
1865 alps_passthrough_mode_v2(psmouse, true);
1866
1867 poll_failed = ps2_command(&psmouse->ps2dev, buf,
1868 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1869
1870 if (priv->flags & ALPS_PASS)
1871 alps_passthrough_mode_v2(psmouse, false);
1872
1873 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
1874 return -1;
1875
1876 if ((psmouse->badbyte & 0xc8) == 0x08) {
1877 /*
1878 * Poll the track stick ...
1879 */
1880 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1881 return -1;
1882 }
1883
1884 memcpy(psmouse->packet, buf, sizeof(buf));
1885 return 0;
1886 }
1887
1888 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1889 {
1890 struct alps_data *priv = psmouse->private;
1891
1892 if ((priv->flags & ALPS_PASS) &&
1893 alps_passthrough_mode_v2(psmouse, true)) {
1894 return -1;
1895 }
1896
1897 if (alps_tap_mode(psmouse, true)) {
1898 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1899 return -1;
1900 }
1901
1902 if (alps_absolute_mode_v1_v2(psmouse)) {
1903 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1904 return -1;
1905 }
1906
1907 if ((priv->flags & ALPS_PASS) &&
1908 alps_passthrough_mode_v2(psmouse, false)) {
1909 return -1;
1910 }
1911
1912 /* ALPS needs stream mode, otherwise it won't report any data */
1913 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1914 psmouse_err(psmouse, "Failed to enable stream mode\n");
1915 return -1;
1916 }
1917
1918 return 0;
1919 }
1920
1921 static int alps_hw_init_v6(struct psmouse *psmouse)
1922 {
1923 unsigned char param[2] = {0xC8, 0x14};
1924
1925 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
1926 if (alps_passthrough_mode_v2(psmouse, true))
1927 return -1;
1928
1929 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1930 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1931 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1932 ps2_command(&psmouse->ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1933 ps2_command(&psmouse->ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
1934 return -1;
1935
1936 if (alps_passthrough_mode_v2(psmouse, false))
1937 return -1;
1938
1939 if (alps_absolute_mode_v6(psmouse)) {
1940 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1941 return -1;
1942 }
1943
1944 return 0;
1945 }
1946
1947 /*
1948 * Enable or disable passthrough mode to the trackstick.
1949 */
1950 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
1951 int reg_base, bool enable)
1952 {
1953 int reg_val, ret = -1;
1954
1955 if (alps_enter_command_mode(psmouse))
1956 return -1;
1957
1958 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
1959 if (reg_val == -1)
1960 goto error;
1961
1962 if (enable)
1963 reg_val |= 0x01;
1964 else
1965 reg_val &= ~0x01;
1966
1967 ret = __alps_command_mode_write_reg(psmouse, reg_val);
1968
1969 error:
1970 if (alps_exit_command_mode(psmouse))
1971 ret = -1;
1972 return ret;
1973 }
1974
1975 /* Must be in command mode when calling this function */
1976 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1977 {
1978 int reg_val;
1979
1980 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1981 if (reg_val == -1)
1982 return -1;
1983
1984 reg_val |= 0x06;
1985 if (__alps_command_mode_write_reg(psmouse, reg_val))
1986 return -1;
1987
1988 return 0;
1989 }
1990
1991 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base)
1992 {
1993 int ret = -EIO, reg_val;
1994
1995 if (alps_enter_command_mode(psmouse))
1996 goto error;
1997
1998 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
1999 if (reg_val == -1)
2000 goto error;
2001
2002 /* bit 7: trackstick is present */
2003 ret = reg_val & 0x80 ? 0 : -ENODEV;
2004
2005 error:
2006 alps_exit_command_mode(psmouse);
2007 return ret;
2008 }
2009
2010 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2011 {
2012 struct ps2dev *ps2dev = &psmouse->ps2dev;
2013 int ret = 0;
2014 unsigned char param[4];
2015
2016 if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2017 return -EIO;
2018
2019 /*
2020 * E7 report for the trackstick
2021 *
2022 * There have been reports of failures to seem to trace back
2023 * to the above trackstick check failing. When these occur
2024 * this E7 report fails, so when that happens we continue
2025 * with the assumption that there isn't a trackstick after
2026 * all.
2027 */
2028 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2029 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2030 ret = -ENODEV;
2031 } else {
2032 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2033
2034 /*
2035 * Not sure what this does, but it is absolutely
2036 * essential. Without it, the touchpad does not
2037 * work at all and the trackstick just emits normal
2038 * PS/2 packets.
2039 */
2040 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2041 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2042 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2043 alps_command_mode_send_nibble(psmouse, 0x9) ||
2044 alps_command_mode_send_nibble(psmouse, 0x4)) {
2045 psmouse_err(psmouse,
2046 "Error sending magic E6 sequence\n");
2047 ret = -EIO;
2048 goto error;
2049 }
2050
2051 /*
2052 * This ensures the trackstick packets are in the format
2053 * supported by this driver. If bit 1 isn't set the packet
2054 * format is different.
2055 */
2056 if (alps_enter_command_mode(psmouse) ||
2057 alps_command_mode_write_reg(psmouse,
2058 reg_base + 0x08, 0x82) ||
2059 alps_exit_command_mode(psmouse))
2060 ret = -EIO;
2061 }
2062
2063 error:
2064 if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2065 ret = -EIO;
2066
2067 return ret;
2068 }
2069
2070 static int alps_hw_init_v3(struct psmouse *psmouse)
2071 {
2072 struct ps2dev *ps2dev = &psmouse->ps2dev;
2073 int reg_val;
2074 unsigned char param[4];
2075
2076 reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE);
2077 if (reg_val == -EIO)
2078 goto error;
2079
2080 if (reg_val == 0 &&
2081 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2082 goto error;
2083
2084 if (alps_enter_command_mode(psmouse) ||
2085 alps_absolute_mode_v3(psmouse)) {
2086 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2087 goto error;
2088 }
2089
2090 reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2091 if (reg_val == -1)
2092 goto error;
2093 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2094 goto error;
2095
2096 reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2097 if (reg_val == -1)
2098 goto error;
2099 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2100 goto error;
2101
2102 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2103 goto error;
2104 if (__alps_command_mode_write_reg(psmouse, 0x04))
2105 goto error;
2106
2107 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2108 goto error;
2109 if (__alps_command_mode_write_reg(psmouse, 0x03))
2110 goto error;
2111
2112 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2113 goto error;
2114 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2115 goto error;
2116
2117 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2118 goto error;
2119 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2120 goto error;
2121
2122 alps_exit_command_mode(psmouse);
2123
2124 /* Set rate and enable data reporting */
2125 param[0] = 0x64;
2126 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2127 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2128 psmouse_err(psmouse, "Failed to enable data reporting\n");
2129 return -1;
2130 }
2131
2132 return 0;
2133
2134 error:
2135 /*
2136 * Leaving the touchpad in command mode will essentially render
2137 * it unusable until the machine reboots, so exit it here just
2138 * to be safe
2139 */
2140 alps_exit_command_mode(psmouse);
2141 return -1;
2142 }
2143
2144 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2145 {
2146 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2147 struct alps_data *priv = psmouse->private;
2148
2149 reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2150 if (reg < 0)
2151 return reg;
2152
2153 x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2154 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2155
2156 y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2157 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2158
2159 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2160 if (reg < 0)
2161 return reg;
2162
2163 x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2164 x_electrode = 17 + x_electrode;
2165
2166 y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2167 y_electrode = 13 + y_electrode;
2168
2169 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2170 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2171
2172 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2173 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2174
2175 psmouse_dbg(psmouse,
2176 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2177 x_pitch, y_pitch, x_electrode, y_electrode,
2178 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2179
2180 return 0;
2181 }
2182
2183 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2184 {
2185 struct alps_data *priv = psmouse->private;
2186 struct ps2dev *ps2dev = &psmouse->ps2dev;
2187 int reg_val, ret = -1;
2188
2189 if (priv->flags & ALPS_DUALPOINT) {
2190 reg_val = alps_setup_trackstick_v3(psmouse,
2191 ALPS_REG_BASE_RUSHMORE);
2192 if (reg_val == -EIO)
2193 goto error;
2194 }
2195
2196 if (alps_enter_command_mode(psmouse) ||
2197 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2198 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2199 goto error;
2200
2201 if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2202 goto error;
2203
2204 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2205 if (reg_val == -1)
2206 goto error;
2207 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2208 goto error;
2209
2210 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2211 goto error;
2212
2213 /* enter absolute mode */
2214 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2215 if (reg_val == -1)
2216 goto error;
2217 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2218 goto error;
2219
2220 alps_exit_command_mode(psmouse);
2221 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2222
2223 error:
2224 alps_exit_command_mode(psmouse);
2225 return ret;
2226 }
2227
2228 /* Must be in command mode when calling this function */
2229 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2230 {
2231 int reg_val;
2232
2233 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2234 if (reg_val == -1)
2235 return -1;
2236
2237 reg_val |= 0x02;
2238 if (__alps_command_mode_write_reg(psmouse, reg_val))
2239 return -1;
2240
2241 return 0;
2242 }
2243
2244 static int alps_hw_init_v4(struct psmouse *psmouse)
2245 {
2246 struct ps2dev *ps2dev = &psmouse->ps2dev;
2247 unsigned char param[4];
2248
2249 if (alps_enter_command_mode(psmouse))
2250 goto error;
2251
2252 if (alps_absolute_mode_v4(psmouse)) {
2253 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2254 goto error;
2255 }
2256
2257 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2258 goto error;
2259
2260 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2261 goto error;
2262
2263 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2264 goto error;
2265
2266 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2267 goto error;
2268
2269 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2270 goto error;
2271
2272 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2273 goto error;
2274
2275 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2276 goto error;
2277
2278 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2279 goto error;
2280
2281 alps_exit_command_mode(psmouse);
2282
2283 /*
2284 * This sequence changes the output from a 9-byte to an
2285 * 8-byte format. All the same data seems to be present,
2286 * just in a more compact format.
2287 */
2288 param[0] = 0xc8;
2289 param[1] = 0x64;
2290 param[2] = 0x50;
2291 if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2292 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
2293 ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
2294 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2295 return -1;
2296
2297 /* Set rate and enable data reporting */
2298 param[0] = 0x64;
2299 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2300 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2301 psmouse_err(psmouse, "Failed to enable data reporting\n");
2302 return -1;
2303 }
2304
2305 return 0;
2306
2307 error:
2308 /*
2309 * Leaving the touchpad in command mode will essentially render
2310 * it unusable until the machine reboots, so exit it here just
2311 * to be safe
2312 */
2313 alps_exit_command_mode(psmouse);
2314 return -1;
2315 }
2316
2317 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2318 unsigned char index, unsigned char otp[])
2319 {
2320 struct ps2dev *ps2dev = &psmouse->ps2dev;
2321
2322 switch (index) {
2323 case 0:
2324 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2325 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2326 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2327 return -1;
2328
2329 break;
2330
2331 case 1:
2332 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2333 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2334 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2335 return -1;
2336
2337 break;
2338 }
2339
2340 return 0;
2341 }
2342
2343 int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2344 struct alps_data *priv)
2345 {
2346 int num_x_electrode;
2347 int num_y_electrode;
2348 int x_pitch, y_pitch, x_phys, y_phys;
2349
2350 num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2351 num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2352
2353 priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2354 priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2355
2356 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2357 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2358
2359 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2360 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2361
2362 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2363 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2364
2365 return 0;
2366 }
2367
2368 int alps_update_btn_info_ss4_v2(unsigned char otp[][4], struct alps_data *priv)
2369 {
2370
2371 unsigned char is_btnless;
2372
2373 is_btnless = (otp[1][1] >> 3) & 0x01;
2374
2375 if (is_btnless)
2376 priv->flags |= ALPS_BUTTONPAD;
2377
2378 return 0;
2379 }
2380
2381 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2382 struct alps_data *priv)
2383 {
2384 unsigned char otp[2][4];
2385
2386 memset(otp, 0, sizeof(otp));
2387
2388 if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) ||
2389 alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]))
2390 return -1;
2391
2392 alps_update_device_area_ss4_v2(otp, priv);
2393
2394 alps_update_btn_info_ss4_v2(otp, priv);
2395
2396 return 0;
2397 }
2398
2399 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2400 struct alps_data *priv)
2401 {
2402 struct ps2dev *ps2dev = &psmouse->ps2dev;
2403 unsigned char param[4] = {0};
2404 int num_x_electrode, num_y_electrode;
2405
2406 if (alps_enter_command_mode(psmouse))
2407 return -1;
2408
2409 param[0] = 0x0a;
2410 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2411 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2412 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2413 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2414 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE))
2415 return -1;
2416
2417 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2418 return -1;
2419
2420 /*
2421 * Dolphin's sensor line number is not fixed. It can be calculated
2422 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2423 * Further more, we can get device's x_max and y_max by multiplying
2424 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2425 *
2426 * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2427 * real sensor line number X = 11 + 8 = 19, and
2428 * real sensor line number Y = 8 + 1 = 9.
2429 * So, x_max = (19 - 1) * 64 = 1152, and
2430 * y_max = (9 - 1) * 64 = 512.
2431 */
2432 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2433 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2434 priv->x_bits = num_x_electrode;
2435 priv->y_bits = num_y_electrode;
2436 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2437 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2438
2439 if (alps_exit_command_mode(psmouse))
2440 return -1;
2441
2442 return 0;
2443 }
2444
2445 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2446 {
2447 struct ps2dev *ps2dev = &psmouse->ps2dev;
2448 unsigned char param[2];
2449
2450 /* This is dolphin "v1" as empirically defined by florin9doi */
2451 param[0] = 0x64;
2452 param[1] = 0x28;
2453
2454 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2455 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2456 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE))
2457 return -1;
2458
2459 return 0;
2460 }
2461
2462 static int alps_hw_init_v7(struct psmouse *psmouse)
2463 {
2464 struct ps2dev *ps2dev = &psmouse->ps2dev;
2465 int reg_val, ret = -1;
2466
2467 if (alps_enter_command_mode(psmouse) ||
2468 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2469 goto error;
2470
2471 if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2472 goto error;
2473
2474 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2475 goto error;
2476
2477 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2478 if (reg_val == -1)
2479 goto error;
2480 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2481 goto error;
2482
2483 alps_exit_command_mode(psmouse);
2484 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2485
2486 error:
2487 alps_exit_command_mode(psmouse);
2488 return ret;
2489 }
2490
2491 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2492 {
2493 struct ps2dev *ps2dev = &psmouse->ps2dev;
2494 char param[2] = {0x64, 0x28};
2495 int ret = -1;
2496
2497 /* enter absolute mode */
2498 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2499 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2500 ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
2501 ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE)) {
2502 goto error;
2503 }
2504
2505 /* T.B.D. Decread noise packet number, delete in the future */
2506 if (alps_exit_command_mode(psmouse) ||
2507 alps_enter_command_mode(psmouse) ||
2508 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2509 goto error;
2510 }
2511 alps_exit_command_mode(psmouse);
2512
2513 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2514
2515 error:
2516 alps_exit_command_mode(psmouse);
2517 return ret;
2518 }
2519
2520 static int alps_set_protocol(struct psmouse *psmouse,
2521 struct alps_data *priv,
2522 const struct alps_protocol_info *protocol)
2523 {
2524 psmouse->private = priv;
2525
2526 setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
2527
2528 priv->proto_version = protocol->version;
2529 priv->byte0 = protocol->byte0;
2530 priv->mask0 = protocol->mask0;
2531 priv->flags = protocol->flags;
2532
2533 priv->x_max = 2000;
2534 priv->y_max = 1400;
2535 priv->x_bits = 15;
2536 priv->y_bits = 11;
2537
2538 switch (priv->proto_version) {
2539 case ALPS_PROTO_V1:
2540 case ALPS_PROTO_V2:
2541 priv->hw_init = alps_hw_init_v1_v2;
2542 priv->process_packet = alps_process_packet_v1_v2;
2543 priv->set_abs_params = alps_set_abs_params_st;
2544 priv->x_max = 1023;
2545 priv->y_max = 767;
2546 break;
2547
2548 case ALPS_PROTO_V3:
2549 priv->hw_init = alps_hw_init_v3;
2550 priv->process_packet = alps_process_packet_v3;
2551 priv->set_abs_params = alps_set_abs_params_mt;
2552 priv->decode_fields = alps_decode_pinnacle;
2553 priv->nibble_commands = alps_v3_nibble_commands;
2554 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2555 break;
2556
2557 case ALPS_PROTO_V3_RUSHMORE:
2558 priv->hw_init = alps_hw_init_rushmore_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_rushmore;
2562 priv->nibble_commands = alps_v3_nibble_commands;
2563 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2564 priv->x_bits = 16;
2565 priv->y_bits = 12;
2566
2567 if (alps_probe_trackstick_v3(psmouse,
2568 ALPS_REG_BASE_RUSHMORE) < 0)
2569 priv->flags &= ~ALPS_DUALPOINT;
2570
2571 break;
2572
2573 case ALPS_PROTO_V4:
2574 priv->hw_init = alps_hw_init_v4;
2575 priv->process_packet = alps_process_packet_v4;
2576 priv->set_abs_params = alps_set_abs_params_mt;
2577 priv->nibble_commands = alps_v4_nibble_commands;
2578 priv->addr_command = PSMOUSE_CMD_DISABLE;
2579 break;
2580
2581 case ALPS_PROTO_V5:
2582 priv->hw_init = alps_hw_init_dolphin_v1;
2583 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2584 priv->decode_fields = alps_decode_dolphin;
2585 priv->set_abs_params = alps_set_abs_params_mt;
2586 priv->nibble_commands = alps_v3_nibble_commands;
2587 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2588 priv->x_bits = 23;
2589 priv->y_bits = 12;
2590
2591 if (alps_dolphin_get_device_area(psmouse, priv))
2592 return -EIO;
2593
2594 break;
2595
2596 case ALPS_PROTO_V6:
2597 priv->hw_init = alps_hw_init_v6;
2598 priv->process_packet = alps_process_packet_v6;
2599 priv->set_abs_params = alps_set_abs_params_st;
2600 priv->nibble_commands = alps_v6_nibble_commands;
2601 priv->x_max = 2047;
2602 priv->y_max = 1535;
2603 break;
2604
2605 case ALPS_PROTO_V7:
2606 priv->hw_init = alps_hw_init_v7;
2607 priv->process_packet = alps_process_packet_v7;
2608 priv->decode_fields = alps_decode_packet_v7;
2609 priv->set_abs_params = alps_set_abs_params_v7;
2610 priv->nibble_commands = alps_v3_nibble_commands;
2611 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2612 priv->x_max = 0xfff;
2613 priv->y_max = 0x7ff;
2614
2615 if (priv->fw_ver[1] != 0xba)
2616 priv->flags |= ALPS_BUTTONPAD;
2617
2618 break;
2619
2620 case ALPS_PROTO_V8:
2621 priv->hw_init = alps_hw_init_ss4_v2;
2622 priv->process_packet = alps_process_packet_ss4_v2;
2623 priv->decode_fields = alps_decode_ss4_v2;
2624 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2625 priv->nibble_commands = alps_v3_nibble_commands;
2626 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2627
2628 if (alps_set_defaults_ss4_v2(psmouse, priv))
2629 return -EIO;
2630
2631 break;
2632 }
2633
2634 return 0;
2635 }
2636
2637 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2638 unsigned char *ec)
2639 {
2640 const struct alps_model_info *model;
2641 int i;
2642
2643 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2644 model = &alps_model_data[i];
2645
2646 if (!memcmp(e7, model->signature, sizeof(model->signature)) &&
2647 (!model->command_mode_resp ||
2648 model->command_mode_resp == ec[2])) {
2649
2650 return &model->protocol_info;
2651 }
2652 }
2653
2654 return NULL;
2655 }
2656
2657 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2658 {
2659 const struct alps_protocol_info *protocol;
2660 unsigned char e6[4], e7[4], ec[4];
2661 int error;
2662
2663 /*
2664 * First try "E6 report".
2665 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2666 * The bits 0-2 of the first byte will be 1s if some buttons are
2667 * pressed.
2668 */
2669 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2670 PSMOUSE_CMD_SETSCALE11, e6))
2671 return -EIO;
2672
2673 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2674 return -EINVAL;
2675
2676 /*
2677 * Now get the "E7" and "EC" reports. These will uniquely identify
2678 * most ALPS touchpads.
2679 */
2680 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2681 PSMOUSE_CMD_SETSCALE21, e7) ||
2682 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2683 PSMOUSE_CMD_RESET_WRAP, ec) ||
2684 alps_exit_command_mode(psmouse))
2685 return -EIO;
2686
2687 protocol = alps_match_table(e7, ec);
2688 if (!protocol) {
2689 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2690 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2691 protocol = &alps_v5_protocol_data;
2692 } else if (ec[0] == 0x88 &&
2693 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2694 protocol = &alps_v7_protocol_data;
2695 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2696 protocol = &alps_v3_rushmore_data;
2697 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2698 ec[2] >= 0x90 && ec[2] <= 0x9d) {
2699 protocol = &alps_v3_protocol_data;
2700 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2701 e7[2] == 0x14 && ec[1] == 0x02) {
2702 protocol = &alps_v8_protocol_data;
2703 } else {
2704 psmouse_dbg(psmouse,
2705 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2706 return -EINVAL;
2707 }
2708 }
2709
2710 if (priv) {
2711 /* Save the Firmware version */
2712 memcpy(priv->fw_ver, ec, 3);
2713 error = alps_set_protocol(psmouse, priv, protocol);
2714 if (error)
2715 return error;
2716 }
2717
2718 return 0;
2719 }
2720
2721 static int alps_reconnect(struct psmouse *psmouse)
2722 {
2723 struct alps_data *priv = psmouse->private;
2724
2725 psmouse_reset(psmouse);
2726
2727 if (alps_identify(psmouse, priv) < 0)
2728 return -1;
2729
2730 return priv->hw_init(psmouse);
2731 }
2732
2733 static void alps_disconnect(struct psmouse *psmouse)
2734 {
2735 struct alps_data *priv = psmouse->private;
2736
2737 psmouse_reset(psmouse);
2738 del_timer_sync(&priv->timer);
2739 if (priv->dev2)
2740 input_unregister_device(priv->dev2);
2741 if (!IS_ERR_OR_NULL(priv->dev3))
2742 input_unregister_device(priv->dev3);
2743 kfree(priv);
2744 }
2745
2746 static void alps_set_abs_params_st(struct alps_data *priv,
2747 struct input_dev *dev1)
2748 {
2749 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2750 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2751 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2752 }
2753
2754 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2755 struct input_dev *dev1)
2756 {
2757 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2758 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2759
2760 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2761 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2762
2763 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2764 set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
2765 }
2766
2767 static void alps_set_abs_params_mt(struct alps_data *priv,
2768 struct input_dev *dev1)
2769 {
2770 alps_set_abs_params_mt_common(priv, dev1);
2771 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2772
2773 input_mt_init_slots(dev1, MAX_TOUCHES,
2774 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2775 INPUT_MT_TRACK | INPUT_MT_SEMI_MT);
2776 }
2777
2778 static void alps_set_abs_params_v7(struct alps_data *priv,
2779 struct input_dev *dev1)
2780 {
2781 alps_set_abs_params_mt_common(priv, dev1);
2782
2783 input_mt_init_slots(dev1, MAX_TOUCHES,
2784 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2785 INPUT_MT_TRACK);
2786
2787 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2788 }
2789
2790 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
2791 struct input_dev *dev1)
2792 {
2793 alps_set_abs_params_mt_common(priv, dev1);
2794 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2795 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
2796
2797 input_mt_init_slots(dev1, MAX_TOUCHES,
2798 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
2799 INPUT_MT_TRACK);
2800 }
2801
2802 int alps_init(struct psmouse *psmouse)
2803 {
2804 struct alps_data *priv = psmouse->private;
2805 struct input_dev *dev1 = psmouse->dev;
2806 int error;
2807
2808 error = priv->hw_init(psmouse);
2809 if (error)
2810 goto init_fail;
2811
2812 /*
2813 * Undo part of setup done for us by psmouse core since touchpad
2814 * is not a relative device.
2815 */
2816 __clear_bit(EV_REL, dev1->evbit);
2817 __clear_bit(REL_X, dev1->relbit);
2818 __clear_bit(REL_Y, dev1->relbit);
2819
2820 /*
2821 * Now set up our capabilities.
2822 */
2823 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
2824 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
2825 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
2826 dev1->keybit[BIT_WORD(BTN_LEFT)] |=
2827 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
2828
2829 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
2830
2831 priv->set_abs_params(priv, dev1);
2832
2833 if (priv->flags & ALPS_WHEEL) {
2834 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
2835 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
2836 }
2837
2838 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
2839 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
2840 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
2841 }
2842
2843 if (priv->flags & ALPS_FOUR_BUTTONS) {
2844 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
2845 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
2846 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
2847 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
2848 } else if (priv->flags & ALPS_BUTTONPAD) {
2849 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
2850 clear_bit(BTN_RIGHT, dev1->keybit);
2851 } else {
2852 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
2853 }
2854
2855 if (priv->flags & ALPS_DUALPOINT) {
2856 struct input_dev *dev2;
2857
2858 dev2 = input_allocate_device();
2859 if (!dev2) {
2860 psmouse_err(psmouse,
2861 "failed to allocate trackstick device\n");
2862 error = -ENOMEM;
2863 goto init_fail;
2864 }
2865
2866 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
2867 psmouse->ps2dev.serio->phys);
2868 dev2->phys = priv->phys2;
2869
2870 /*
2871 * format of input device name is: "protocol vendor name"
2872 * see function psmouse_switch_protocol() in psmouse-base.c
2873 */
2874 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
2875
2876 dev2->id.bustype = BUS_I8042;
2877 dev2->id.vendor = 0x0002;
2878 dev2->id.product = PSMOUSE_ALPS;
2879 dev2->id.version = priv->proto_version;
2880 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
2881
2882 input_set_capability(dev2, EV_REL, REL_X);
2883 input_set_capability(dev2, EV_REL, REL_Y);
2884 input_set_capability(dev2, EV_KEY, BTN_LEFT);
2885 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
2886 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
2887
2888 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
2889 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
2890
2891 error = input_register_device(dev2);
2892 if (error) {
2893 psmouse_err(psmouse,
2894 "failed to register trackstick device: %d\n",
2895 error);
2896 input_free_device(dev2);
2897 goto init_fail;
2898 }
2899
2900 priv->dev2 = dev2;
2901 }
2902
2903 priv->psmouse = psmouse;
2904
2905 INIT_DELAYED_WORK(&priv->dev3_register_work,
2906 alps_register_bare_ps2_mouse);
2907
2908 psmouse->protocol_handler = alps_process_byte;
2909 psmouse->poll = alps_poll;
2910 psmouse->disconnect = alps_disconnect;
2911 psmouse->reconnect = alps_reconnect;
2912 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
2913
2914 /* We are having trouble resyncing ALPS touchpads so disable it for now */
2915 psmouse->resync_time = 0;
2916
2917 /* Allow 2 invalid packets without resetting device */
2918 psmouse->resetafter = psmouse->pktsize * 2;
2919
2920 return 0;
2921
2922 init_fail:
2923 psmouse_reset(psmouse);
2924 /*
2925 * Even though we did not allocate psmouse->private we do free
2926 * it here.
2927 */
2928 kfree(psmouse->private);
2929 psmouse->private = NULL;
2930 return error;
2931 }
2932
2933 int alps_detect(struct psmouse *psmouse, bool set_properties)
2934 {
2935 struct alps_data *priv;
2936 int error;
2937
2938 error = alps_identify(psmouse, NULL);
2939 if (error)
2940 return error;
2941
2942 /*
2943 * Reset the device to make sure it is fully operational:
2944 * on some laptops, like certain Dell Latitudes, we may
2945 * fail to properly detect presence of trackstick if device
2946 * has not been reset.
2947 */
2948 psmouse_reset(psmouse);
2949
2950 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
2951 if (!priv)
2952 return -ENOMEM;
2953
2954 error = alps_identify(psmouse, priv);
2955 if (error) {
2956 kfree(priv);
2957 return error;
2958 }
2959
2960 if (set_properties) {
2961 psmouse->vendor = "ALPS";
2962 psmouse->name = priv->flags & ALPS_DUALPOINT ?
2963 "DualPoint TouchPad" : "GlidePoint";
2964 psmouse->model = priv->proto_version;
2965 } else {
2966 /*
2967 * Destroy alps_data structure we allocated earlier since
2968 * this was just a "trial run". Otherwise we'll keep it
2969 * to be used by alps_init() which has to be called if
2970 * we succeed and set_properties is true.
2971 */
2972 kfree(priv);
2973 psmouse->private = NULL;
2974 }
2975
2976 return 0;
2977 }
2978
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