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_V3_X_MAX 2000
31 #define ALPS_V3_Y_MAX 1400
32
33 #define ALPS_BITMAP_X_BITS 15
34 #define ALPS_BITMAP_Y_BITS 11
35
36 #define ALPS_CMD_NIBBLE_10 0x01f2
37
38 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
39 { PSMOUSE_CMD_SETPOLL, 0x00 }, /* 0 */
40 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
41 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
42 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
43 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
44 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
45 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
46 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
47 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
48 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
49 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
50 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */
51 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */
52 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */
53 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */
54 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
55 };
56
57 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
58 { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */
59 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
60 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
61 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
62 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
63 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
64 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
65 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
66 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
67 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
68 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
69 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */
70 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */
71 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */
72 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */
73 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
74 };
75
76
77 #define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */
78 #define ALPS_PASS 0x04 /* device has a pass-through port */
79
80 #define ALPS_WHEEL 0x08 /* hardware wheel present */
81 #define ALPS_FW_BK_1 0x10 /* front & back buttons present */
82 #define ALPS_FW_BK_2 0x20 /* front & back buttons present */
83 #define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */
84 #define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with
85 6-byte ALPS packet */
86
87 static const struct alps_model_info alps_model_data[] = {
88 { { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
89 { { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 }, /* UMAX-530T */
90 { { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
91 { { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
92 { { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 }, /* HP ze1115 */
93 { { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
94 { { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
95 { { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
96 { { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
97 { { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
98 { { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
99 { { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
100 { { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT }, /* ThinkPad R61 8918-5QG */
101 { { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
102 { { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
103 { { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
104 { { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
105 { { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
106 /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
107 { { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
108 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
109 { { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
110 { { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
111 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
112 { { 0x73, 0x02, 0x64 }, 0x9b, ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT },
113 { { 0x73, 0x02, 0x64 }, 0x9d, ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT },
114 { { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
115 };
116
117 /*
118 * XXX - this entry is suspicious. First byte has zero lower nibble,
119 * which is what a normal mouse would report. Also, the value 0x0e
120 * isn't valid per PS/2 spec.
121 */
122
123 /* Packet formats are described in Documentation/input/alps.txt */
124
alps_is_valid_first_byte(const struct alps_model_info * model,unsigned char data)125 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
126 unsigned char data)
127 {
128 return (data & model->mask0) == model->byte0;
129 }
130
alps_report_buttons(struct psmouse * psmouse,struct input_dev * dev1,struct input_dev * dev2,int left,int right,int middle)131 static void alps_report_buttons(struct psmouse *psmouse,
132 struct input_dev *dev1, struct input_dev *dev2,
133 int left, int right, int middle)
134 {
135 struct input_dev *dev;
136
137 /*
138 * If shared button has already been reported on the
139 * other device (dev2) then this event should be also
140 * sent through that device.
141 */
142 dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
143 input_report_key(dev, BTN_LEFT, left);
144
145 dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
146 input_report_key(dev, BTN_RIGHT, right);
147
148 dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
149 input_report_key(dev, BTN_MIDDLE, middle);
150
151 /*
152 * Sync the _other_ device now, we'll do the first
153 * device later once we report the rest of the events.
154 */
155 input_sync(dev2);
156 }
157
alps_process_packet_v1_v2(struct psmouse * psmouse)158 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
159 {
160 struct alps_data *priv = psmouse->private;
161 const struct alps_model_info *model = priv->i;
162 unsigned char *packet = psmouse->packet;
163 struct input_dev *dev = psmouse->dev;
164 struct input_dev *dev2 = priv->dev2;
165 int x, y, z, ges, fin, left, right, middle;
166 int back = 0, forward = 0;
167
168 if (model->proto_version == ALPS_PROTO_V1) {
169 left = packet[2] & 0x10;
170 right = packet[2] & 0x08;
171 middle = 0;
172 x = packet[1] | ((packet[0] & 0x07) << 7);
173 y = packet[4] | ((packet[3] & 0x07) << 7);
174 z = packet[5];
175 } else {
176 left = packet[3] & 1;
177 right = packet[3] & 2;
178 middle = packet[3] & 4;
179 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
180 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
181 z = packet[5];
182 }
183
184 if (model->flags & ALPS_FW_BK_1) {
185 back = packet[0] & 0x10;
186 forward = packet[2] & 4;
187 }
188
189 if (model->flags & ALPS_FW_BK_2) {
190 back = packet[3] & 4;
191 forward = packet[2] & 4;
192 if ((middle = forward && back))
193 forward = back = 0;
194 }
195
196 ges = packet[2] & 1;
197 fin = packet[2] & 2;
198
199 if ((model->flags & ALPS_DUALPOINT) && z == 127) {
200 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
201 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
202
203 alps_report_buttons(psmouse, dev2, dev, left, right, middle);
204
205 input_sync(dev2);
206 return;
207 }
208
209 alps_report_buttons(psmouse, dev, dev2, left, right, middle);
210
211 /* Convert hardware tap to a reasonable Z value */
212 if (ges && !fin)
213 z = 40;
214
215 /*
216 * A "tap and drag" operation is reported by the hardware as a transition
217 * from (!fin && ges) to (fin && ges). This should be translated to the
218 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
219 */
220 if (ges && fin && !priv->prev_fin) {
221 input_report_abs(dev, ABS_X, x);
222 input_report_abs(dev, ABS_Y, y);
223 input_report_abs(dev, ABS_PRESSURE, 0);
224 input_report_key(dev, BTN_TOOL_FINGER, 0);
225 input_sync(dev);
226 }
227 priv->prev_fin = fin;
228
229 if (z > 30)
230 input_report_key(dev, BTN_TOUCH, 1);
231 if (z < 25)
232 input_report_key(dev, BTN_TOUCH, 0);
233
234 if (z > 0) {
235 input_report_abs(dev, ABS_X, x);
236 input_report_abs(dev, ABS_Y, y);
237 }
238
239 input_report_abs(dev, ABS_PRESSURE, z);
240 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
241
242 if (model->flags & ALPS_WHEEL)
243 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
244
245 if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
246 input_report_key(dev, BTN_FORWARD, forward);
247 input_report_key(dev, BTN_BACK, back);
248 }
249
250 if (model->flags & ALPS_FOUR_BUTTONS) {
251 input_report_key(dev, BTN_0, packet[2] & 4);
252 input_report_key(dev, BTN_1, packet[0] & 0x10);
253 input_report_key(dev, BTN_2, packet[3] & 4);
254 input_report_key(dev, BTN_3, packet[0] & 0x20);
255 }
256
257 input_sync(dev);
258 }
259
260 /*
261 * Process bitmap data from v3 and v4 protocols. Returns the number of
262 * fingers detected. A return value of 0 means at least one of the
263 * bitmaps was empty.
264 *
265 * The bitmaps don't have enough data to track fingers, so this function
266 * only generates points representing a bounding box of all contacts.
267 * These points are returned in x1, y1, x2, and y2 when the return value
268 * is greater than 0.
269 */
alps_process_bitmap(unsigned int x_map,unsigned int y_map,int * x1,int * y1,int * x2,int * y2)270 static int alps_process_bitmap(unsigned int x_map, unsigned int y_map,
271 int *x1, int *y1, int *x2, int *y2)
272 {
273 struct alps_bitmap_point {
274 int start_bit;
275 int num_bits;
276 };
277
278 int fingers_x = 0, fingers_y = 0, fingers;
279 int i, bit, prev_bit;
280 struct alps_bitmap_point x_low = {0,}, x_high = {0,};
281 struct alps_bitmap_point y_low = {0,}, y_high = {0,};
282 struct alps_bitmap_point *point;
283
284 if (!x_map || !y_map)
285 return 0;
286
287 *x1 = *y1 = *x2 = *y2 = 0;
288
289 prev_bit = 0;
290 point = &x_low;
291 for (i = 0; x_map != 0; i++, x_map >>= 1) {
292 bit = x_map & 1;
293 if (bit) {
294 if (!prev_bit) {
295 point->start_bit = i;
296 fingers_x++;
297 }
298 point->num_bits++;
299 } else {
300 if (prev_bit)
301 point = &x_high;
302 else
303 point->num_bits = 0;
304 }
305 prev_bit = bit;
306 }
307
308 /*
309 * y bitmap is reversed for what we need (lower positions are in
310 * higher bits), so we process from the top end.
311 */
312 y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - ALPS_BITMAP_Y_BITS);
313 prev_bit = 0;
314 point = &y_low;
315 for (i = 0; y_map != 0; i++, y_map <<= 1) {
316 bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
317 if (bit) {
318 if (!prev_bit) {
319 point->start_bit = i;
320 fingers_y++;
321 }
322 point->num_bits++;
323 } else {
324 if (prev_bit)
325 point = &y_high;
326 else
327 point->num_bits = 0;
328 }
329 prev_bit = bit;
330 }
331
332 /*
333 * Fingers can overlap, so we use the maximum count of fingers
334 * on either axis as the finger count.
335 */
336 fingers = max(fingers_x, fingers_y);
337
338 /*
339 * If total fingers is > 1 but either axis reports only a single
340 * contact, we have overlapping or adjacent fingers. For the
341 * purposes of creating a bounding box, divide the single contact
342 * (roughly) equally between the two points.
343 */
344 if (fingers > 1) {
345 if (fingers_x == 1) {
346 i = x_low.num_bits / 2;
347 x_low.num_bits = x_low.num_bits - i;
348 x_high.start_bit = x_low.start_bit + i;
349 x_high.num_bits = max(i, 1);
350 } else if (fingers_y == 1) {
351 i = y_low.num_bits / 2;
352 y_low.num_bits = y_low.num_bits - i;
353 y_high.start_bit = y_low.start_bit + i;
354 y_high.num_bits = max(i, 1);
355 }
356 }
357
358 *x1 = (ALPS_V3_X_MAX * (2 * x_low.start_bit + x_low.num_bits - 1)) /
359 (2 * (ALPS_BITMAP_X_BITS - 1));
360 *y1 = (ALPS_V3_Y_MAX * (2 * y_low.start_bit + y_low.num_bits - 1)) /
361 (2 * (ALPS_BITMAP_Y_BITS - 1));
362
363 if (fingers > 1) {
364 *x2 = (ALPS_V3_X_MAX * (2 * x_high.start_bit + x_high.num_bits - 1)) /
365 (2 * (ALPS_BITMAP_X_BITS - 1));
366 *y2 = (ALPS_V3_Y_MAX * (2 * y_high.start_bit + y_high.num_bits - 1)) /
367 (2 * (ALPS_BITMAP_Y_BITS - 1));
368 }
369
370 return fingers;
371 }
372
alps_set_slot(struct input_dev * dev,int slot,bool active,int x,int y)373 static void alps_set_slot(struct input_dev *dev, int slot, bool active,
374 int x, int y)
375 {
376 input_mt_slot(dev, slot);
377 input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
378 if (active) {
379 input_report_abs(dev, ABS_MT_POSITION_X, x);
380 input_report_abs(dev, ABS_MT_POSITION_Y, y);
381 }
382 }
383
alps_report_semi_mt_data(struct input_dev * dev,int num_fingers,int x1,int y1,int x2,int y2)384 static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
385 int x1, int y1, int x2, int y2)
386 {
387 alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
388 alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
389 }
390
alps_process_trackstick_packet_v3(struct psmouse * psmouse)391 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
392 {
393 struct alps_data *priv = psmouse->private;
394 unsigned char *packet = psmouse->packet;
395 struct input_dev *dev = priv->dev2;
396 int x, y, z, left, right, middle;
397
398 /* Sanity check packet */
399 if (!(packet[0] & 0x40)) {
400 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
401 return;
402 }
403
404 /*
405 * There's a special packet that seems to indicate the end
406 * of a stream of trackstick data. Filter these out.
407 */
408 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
409 return;
410
411 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
412 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
413 z = (packet[4] & 0x7c) >> 2;
414
415 /*
416 * The x and y values tend to be quite large, and when used
417 * alone the trackstick is difficult to use. Scale them down
418 * to compensate.
419 */
420 x /= 8;
421 y /= 8;
422
423 input_report_rel(dev, REL_X, x);
424 input_report_rel(dev, REL_Y, -y);
425
426 /*
427 * Most ALPS models report the trackstick buttons in the touchpad
428 * packets, but a few report them here. No reliable way has been
429 * found to differentiate between the models upfront, so we enable
430 * the quirk in response to seeing a button press in the trackstick
431 * packet.
432 */
433 left = packet[3] & 0x01;
434 right = packet[3] & 0x02;
435 middle = packet[3] & 0x04;
436
437 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
438 (left || right || middle))
439 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
440
441 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
442 input_report_key(dev, BTN_LEFT, left);
443 input_report_key(dev, BTN_RIGHT, right);
444 input_report_key(dev, BTN_MIDDLE, middle);
445 }
446
447 input_sync(dev);
448 return;
449 }
450
alps_process_touchpad_packet_v3(struct psmouse * psmouse)451 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
452 {
453 struct alps_data *priv = psmouse->private;
454 unsigned char *packet = psmouse->packet;
455 struct input_dev *dev = psmouse->dev;
456 struct input_dev *dev2 = priv->dev2;
457 int x, y, z;
458 int left, right, middle;
459 int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
460 int fingers = 0, bmap_fingers;
461 unsigned int x_bitmap, y_bitmap;
462
463 /*
464 * There's no single feature of touchpad position and bitmap packets
465 * that can be used to distinguish between them. We rely on the fact
466 * that a bitmap packet should always follow a position packet with
467 * bit 6 of packet[4] set.
468 */
469 if (priv->multi_packet) {
470 /*
471 * Sometimes a position packet will indicate a multi-packet
472 * sequence, but then what follows is another position
473 * packet. Check for this, and when it happens process the
474 * position packet as usual.
475 */
476 if (packet[0] & 0x40) {
477 fingers = (packet[5] & 0x3) + 1;
478 x_bitmap = ((packet[4] & 0x7e) << 8) |
479 ((packet[1] & 0x7f) << 2) |
480 ((packet[0] & 0x30) >> 4);
481 y_bitmap = ((packet[3] & 0x70) << 4) |
482 ((packet[2] & 0x7f) << 1) |
483 (packet[4] & 0x01);
484
485 bmap_fingers = alps_process_bitmap(x_bitmap, y_bitmap,
486 &x1, &y1, &x2, &y2);
487
488 /*
489 * We shouldn't report more than one finger if
490 * we don't have two coordinates.
491 */
492 if (fingers > 1 && bmap_fingers < 2)
493 fingers = bmap_fingers;
494
495 /* Now process position packet */
496 packet = priv->multi_data;
497 } else {
498 priv->multi_packet = 0;
499 }
500 }
501
502 /*
503 * Bit 6 of byte 0 is not usually set in position packets. The only
504 * times it seems to be set is in situations where the data is
505 * suspect anyway, e.g. a palm resting flat on the touchpad. Given
506 * this combined with the fact that this bit is useful for filtering
507 * out misidentified bitmap packets, we reject anything with this
508 * bit set.
509 */
510 if (packet[0] & 0x40)
511 return;
512
513 if (!priv->multi_packet && (packet[4] & 0x40)) {
514 priv->multi_packet = 1;
515 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
516 return;
517 }
518
519 priv->multi_packet = 0;
520
521 left = packet[3] & 0x01;
522 right = packet[3] & 0x02;
523 middle = packet[3] & 0x04;
524
525 x = ((packet[1] & 0x7f) << 4) | ((packet[4] & 0x30) >> 2) |
526 ((packet[0] & 0x30) >> 4);
527 y = ((packet[2] & 0x7f) << 4) | (packet[4] & 0x0f);
528 z = packet[5] & 0x7f;
529
530 /*
531 * Sometimes the hardware sends a single packet with z = 0
532 * in the middle of a stream. Real releases generate packets
533 * with x, y, and z all zero, so these seem to be flukes.
534 * Ignore them.
535 */
536 if (x && y && !z)
537 return;
538
539 /*
540 * If we don't have MT data or the bitmaps were empty, we have
541 * to rely on ST data.
542 */
543 if (!fingers) {
544 x1 = x;
545 y1 = y;
546 fingers = z > 0 ? 1 : 0;
547 }
548
549 if (z >= 64)
550 input_report_key(dev, BTN_TOUCH, 1);
551 else
552 input_report_key(dev, BTN_TOUCH, 0);
553
554 alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
555
556 input_report_key(dev, BTN_TOOL_FINGER, fingers == 1);
557 input_report_key(dev, BTN_TOOL_DOUBLETAP, fingers == 2);
558 input_report_key(dev, BTN_TOOL_TRIPLETAP, fingers == 3);
559 input_report_key(dev, BTN_TOOL_QUADTAP, fingers == 4);
560
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 if (z > 0) {
566 input_report_abs(dev, ABS_X, x);
567 input_report_abs(dev, ABS_Y, y);
568 }
569 input_report_abs(dev, ABS_PRESSURE, z);
570
571 input_sync(dev);
572
573 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
574 left = packet[3] & 0x10;
575 right = packet[3] & 0x20;
576 middle = packet[3] & 0x40;
577
578 input_report_key(dev2, BTN_LEFT, left);
579 input_report_key(dev2, BTN_RIGHT, right);
580 input_report_key(dev2, BTN_MIDDLE, middle);
581 input_sync(dev2);
582 }
583 }
584
alps_process_packet_v3(struct psmouse * psmouse)585 static void alps_process_packet_v3(struct psmouse *psmouse)
586 {
587 unsigned char *packet = psmouse->packet;
588
589 /*
590 * v3 protocol packets come in three types, two representing
591 * touchpad data and one representing trackstick data.
592 * Trackstick packets seem to be distinguished by always
593 * having 0x3f in the last byte. This value has never been
594 * observed in the last byte of either of the other types
595 * of packets.
596 */
597 if (packet[5] == 0x3f) {
598 alps_process_trackstick_packet_v3(psmouse);
599 return;
600 }
601
602 alps_process_touchpad_packet_v3(psmouse);
603 }
604
alps_process_packet_v4(struct psmouse * psmouse)605 static void alps_process_packet_v4(struct psmouse *psmouse)
606 {
607 unsigned char *packet = psmouse->packet;
608 struct input_dev *dev = psmouse->dev;
609 int x, y, z;
610 int left, right;
611
612 left = packet[4] & 0x01;
613 right = packet[4] & 0x02;
614
615 x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
616 ((packet[0] & 0x30) >> 4);
617 y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
618 z = packet[5] & 0x7f;
619
620 if (z >= 64)
621 input_report_key(dev, BTN_TOUCH, 1);
622 else
623 input_report_key(dev, BTN_TOUCH, 0);
624
625 if (z > 0) {
626 input_report_abs(dev, ABS_X, x);
627 input_report_abs(dev, ABS_Y, y);
628 }
629 input_report_abs(dev, ABS_PRESSURE, z);
630
631 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
632 input_report_key(dev, BTN_LEFT, left);
633 input_report_key(dev, BTN_RIGHT, right);
634
635 input_sync(dev);
636 }
637
alps_process_packet(struct psmouse * psmouse)638 static void alps_process_packet(struct psmouse *psmouse)
639 {
640 struct alps_data *priv = psmouse->private;
641 const struct alps_model_info *model = priv->i;
642
643 switch (model->proto_version) {
644 case ALPS_PROTO_V1:
645 case ALPS_PROTO_V2:
646 alps_process_packet_v1_v2(psmouse);
647 break;
648 case ALPS_PROTO_V3:
649 alps_process_packet_v3(psmouse);
650 break;
651 case ALPS_PROTO_V4:
652 alps_process_packet_v4(psmouse);
653 break;
654 }
655 }
656
alps_report_bare_ps2_packet(struct psmouse * psmouse,unsigned char packet[],bool report_buttons)657 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
658 unsigned char packet[],
659 bool report_buttons)
660 {
661 struct alps_data *priv = psmouse->private;
662 struct input_dev *dev2 = priv->dev2;
663
664 if (report_buttons)
665 alps_report_buttons(psmouse, dev2, psmouse->dev,
666 packet[0] & 1, packet[0] & 2, packet[0] & 4);
667
668 input_report_rel(dev2, REL_X,
669 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
670 input_report_rel(dev2, REL_Y,
671 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
672
673 input_sync(dev2);
674 }
675
alps_handle_interleaved_ps2(struct psmouse * psmouse)676 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
677 {
678 struct alps_data *priv = psmouse->private;
679
680 if (psmouse->pktcnt < 6)
681 return PSMOUSE_GOOD_DATA;
682
683 if (psmouse->pktcnt == 6) {
684 /*
685 * Start a timer to flush the packet if it ends up last
686 * 6-byte packet in the stream. Timer needs to fire
687 * psmouse core times out itself. 20 ms should be enough
688 * to decide if we are getting more data or not.
689 */
690 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
691 return PSMOUSE_GOOD_DATA;
692 }
693
694 del_timer(&priv->timer);
695
696 if (psmouse->packet[6] & 0x80) {
697
698 /*
699 * Highest bit is set - that means we either had
700 * complete ALPS packet and this is start of the
701 * next packet or we got garbage.
702 */
703
704 if (((psmouse->packet[3] |
705 psmouse->packet[4] |
706 psmouse->packet[5]) & 0x80) ||
707 (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
708 psmouse_dbg(psmouse,
709 "refusing packet %x %x %x %x (suspected interleaved ps/2)\n",
710 psmouse->packet[3], psmouse->packet[4],
711 psmouse->packet[5], psmouse->packet[6]);
712 return PSMOUSE_BAD_DATA;
713 }
714
715 alps_process_packet(psmouse);
716
717 /* Continue with the next packet */
718 psmouse->packet[0] = psmouse->packet[6];
719 psmouse->pktcnt = 1;
720
721 } else {
722
723 /*
724 * High bit is 0 - that means that we indeed got a PS/2
725 * packet in the middle of ALPS packet.
726 *
727 * There is also possibility that we got 6-byte ALPS
728 * packet followed by 3-byte packet from trackpoint. We
729 * can not distinguish between these 2 scenarios but
730 * because the latter is unlikely to happen in course of
731 * normal operation (user would need to press all
732 * buttons on the pad and start moving trackpoint
733 * without touching the pad surface) we assume former.
734 * Even if we are wrong the wost thing that would happen
735 * the cursor would jump but we should not get protocol
736 * de-synchronization.
737 */
738
739 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
740 false);
741
742 /*
743 * Continue with the standard ALPS protocol handling,
744 * but make sure we won't process it as an interleaved
745 * packet again, which may happen if all buttons are
746 * pressed. To avoid this let's reset the 4th bit which
747 * is normally 1.
748 */
749 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
750 psmouse->pktcnt = 4;
751 }
752
753 return PSMOUSE_GOOD_DATA;
754 }
755
alps_flush_packet(unsigned long data)756 static void alps_flush_packet(unsigned long data)
757 {
758 struct psmouse *psmouse = (struct psmouse *)data;
759
760 serio_pause_rx(psmouse->ps2dev.serio);
761
762 if (psmouse->pktcnt == psmouse->pktsize) {
763
764 /*
765 * We did not any more data in reasonable amount of time.
766 * Validate the last 3 bytes and process as a standard
767 * ALPS packet.
768 */
769 if ((psmouse->packet[3] |
770 psmouse->packet[4] |
771 psmouse->packet[5]) & 0x80) {
772 psmouse_dbg(psmouse,
773 "refusing packet %x %x %x (suspected interleaved ps/2)\n",
774 psmouse->packet[3], psmouse->packet[4],
775 psmouse->packet[5]);
776 } else {
777 alps_process_packet(psmouse);
778 }
779 psmouse->pktcnt = 0;
780 }
781
782 serio_continue_rx(psmouse->ps2dev.serio);
783 }
784
alps_process_byte(struct psmouse * psmouse)785 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
786 {
787 struct alps_data *priv = psmouse->private;
788 const struct alps_model_info *model = priv->i;
789
790 if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
791 if (psmouse->pktcnt == 3) {
792 alps_report_bare_ps2_packet(psmouse, psmouse->packet,
793 true);
794 return PSMOUSE_FULL_PACKET;
795 }
796 return PSMOUSE_GOOD_DATA;
797 }
798
799 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
800
801 if ((model->flags & ALPS_PS2_INTERLEAVED) &&
802 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
803 return alps_handle_interleaved_ps2(psmouse);
804 }
805
806 if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
807 psmouse_dbg(psmouse,
808 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
809 psmouse->packet[0], model->mask0, model->byte0);
810 return PSMOUSE_BAD_DATA;
811 }
812
813 /* Bytes 2 - pktsize should have 0 in the highest bit */
814 if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
815 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
816 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
817 psmouse->pktcnt - 1,
818 psmouse->packet[psmouse->pktcnt - 1]);
819 return PSMOUSE_BAD_DATA;
820 }
821
822 if (psmouse->pktcnt == psmouse->pktsize) {
823 alps_process_packet(psmouse);
824 return PSMOUSE_FULL_PACKET;
825 }
826
827 return PSMOUSE_GOOD_DATA;
828 }
829
alps_command_mode_send_nibble(struct psmouse * psmouse,int nibble)830 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
831 {
832 struct ps2dev *ps2dev = &psmouse->ps2dev;
833 struct alps_data *priv = psmouse->private;
834 int command;
835 unsigned char *param;
836 unsigned char dummy[4];
837
838 BUG_ON(nibble > 0xf);
839
840 command = priv->nibble_commands[nibble].command;
841 param = (command & 0x0f00) ?
842 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
843
844 if (ps2_command(ps2dev, param, command))
845 return -1;
846
847 return 0;
848 }
849
alps_command_mode_set_addr(struct psmouse * psmouse,int addr)850 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
851 {
852 struct ps2dev *ps2dev = &psmouse->ps2dev;
853 struct alps_data *priv = psmouse->private;
854 int i, nibble;
855
856 if (ps2_command(ps2dev, NULL, priv->addr_command))
857 return -1;
858
859 for (i = 12; i >= 0; i -= 4) {
860 nibble = (addr >> i) & 0xf;
861 if (alps_command_mode_send_nibble(psmouse, nibble))
862 return -1;
863 }
864
865 return 0;
866 }
867
__alps_command_mode_read_reg(struct psmouse * psmouse,int addr)868 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
869 {
870 struct ps2dev *ps2dev = &psmouse->ps2dev;
871 unsigned char param[4];
872
873 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
874 return -1;
875
876 /*
877 * The address being read is returned in the first two bytes
878 * of the result. Check that this address matches the expected
879 * address.
880 */
881 if (addr != ((param[0] << 8) | param[1]))
882 return -1;
883
884 return param[2];
885 }
886
alps_command_mode_read_reg(struct psmouse * psmouse,int addr)887 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
888 {
889 if (alps_command_mode_set_addr(psmouse, addr))
890 return -1;
891 return __alps_command_mode_read_reg(psmouse, addr);
892 }
893
__alps_command_mode_write_reg(struct psmouse * psmouse,u8 value)894 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
895 {
896 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
897 return -1;
898 if (alps_command_mode_send_nibble(psmouse, value & 0xf))
899 return -1;
900 return 0;
901 }
902
alps_command_mode_write_reg(struct psmouse * psmouse,int addr,u8 value)903 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
904 u8 value)
905 {
906 if (alps_command_mode_set_addr(psmouse, addr))
907 return -1;
908 return __alps_command_mode_write_reg(psmouse, value);
909 }
910
alps_enter_command_mode(struct psmouse * psmouse,unsigned char * resp)911 static int alps_enter_command_mode(struct psmouse *psmouse,
912 unsigned char *resp)
913 {
914 unsigned char param[4];
915 struct ps2dev *ps2dev = &psmouse->ps2dev;
916
917 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
918 ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
919 ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
920 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
921 psmouse_err(psmouse, "failed to enter command mode\n");
922 return -1;
923 }
924
925 if (param[0] != 0x88 && param[1] != 0x07) {
926 psmouse_dbg(psmouse,
927 "unknown response while entering command mode: %2.2x %2.2x %2.2x\n",
928 param[0], param[1], param[2]);
929 return -1;
930 }
931
932 if (resp)
933 *resp = param[2];
934 return 0;
935 }
936
alps_exit_command_mode(struct psmouse * psmouse)937 static inline int alps_exit_command_mode(struct psmouse *psmouse)
938 {
939 struct ps2dev *ps2dev = &psmouse->ps2dev;
940 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
941 return -1;
942 return 0;
943 }
944
alps_get_model(struct psmouse * psmouse,int * version)945 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
946 {
947 struct ps2dev *ps2dev = &psmouse->ps2dev;
948 static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
949 unsigned char param[4];
950 const struct alps_model_info *model = NULL;
951 int i;
952
953 /*
954 * First try "E6 report".
955 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
956 * The bits 0-2 of the first byte will be 1s if some buttons are
957 * pressed.
958 */
959 param[0] = 0;
960 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
961 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
962 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
963 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
964 return NULL;
965
966 param[0] = param[1] = param[2] = 0xff;
967 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
968 return NULL;
969
970 psmouse_dbg(psmouse, "E6 report: %2.2x %2.2x %2.2x",
971 param[0], param[1], param[2]);
972
973 if ((param[0] & 0xf8) != 0 || param[1] != 0 ||
974 (param[2] != 10 && param[2] != 100))
975 return NULL;
976
977 /*
978 * Now try "E7 report". Allowed responses are in
979 * alps_model_data[].signature
980 */
981 param[0] = 0;
982 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
983 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
984 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
985 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
986 return NULL;
987
988 param[0] = param[1] = param[2] = 0xff;
989 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
990 return NULL;
991
992 psmouse_dbg(psmouse, "E7 report: %2.2x %2.2x %2.2x",
993 param[0], param[1], param[2]);
994
995 if (version) {
996 for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
997 /* empty */;
998 *version = (param[0] << 8) | (param[1] << 4) | i;
999 }
1000
1001 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1002 if (!memcmp(param, alps_model_data[i].signature,
1003 sizeof(alps_model_data[i].signature))) {
1004 model = alps_model_data + i;
1005 break;
1006 }
1007 }
1008
1009 if (model && model->proto_version > ALPS_PROTO_V2) {
1010 /*
1011 * Need to check command mode response to identify
1012 * model
1013 */
1014 model = NULL;
1015 if (alps_enter_command_mode(psmouse, param)) {
1016 psmouse_warn(psmouse,
1017 "touchpad failed to enter command mode\n");
1018 } else {
1019 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1020 if (alps_model_data[i].proto_version > ALPS_PROTO_V2 &&
1021 alps_model_data[i].command_mode_resp == param[0]) {
1022 model = alps_model_data + i;
1023 break;
1024 }
1025 }
1026 alps_exit_command_mode(psmouse);
1027
1028 if (!model)
1029 psmouse_dbg(psmouse,
1030 "Unknown command mode response %2.2x\n",
1031 param[0]);
1032 }
1033 }
1034
1035 return model;
1036 }
1037
1038 /*
1039 * For DualPoint devices select the device that should respond to
1040 * subsequent commands. It looks like glidepad is behind stickpointer,
1041 * I'd thought it would be other way around...
1042 */
alps_passthrough_mode_v2(struct psmouse * psmouse,bool enable)1043 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1044 {
1045 struct ps2dev *ps2dev = &psmouse->ps2dev;
1046 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1047
1048 if (ps2_command(ps2dev, NULL, cmd) ||
1049 ps2_command(ps2dev, NULL, cmd) ||
1050 ps2_command(ps2dev, NULL, cmd) ||
1051 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1052 return -1;
1053
1054 /* we may get 3 more bytes, just ignore them */
1055 ps2_drain(ps2dev, 3, 100);
1056
1057 return 0;
1058 }
1059
alps_absolute_mode_v1_v2(struct psmouse * psmouse)1060 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1061 {
1062 struct ps2dev *ps2dev = &psmouse->ps2dev;
1063
1064 /* Try ALPS magic knock - 4 disable before enable */
1065 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1066 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1067 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1068 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1069 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1070 return -1;
1071
1072 /*
1073 * Switch mouse to poll (remote) mode so motion data will not
1074 * get in our way
1075 */
1076 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1077 }
1078
alps_get_status(struct psmouse * psmouse,char * param)1079 static int alps_get_status(struct psmouse *psmouse, char *param)
1080 {
1081 struct ps2dev *ps2dev = &psmouse->ps2dev;
1082
1083 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1084 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1085 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1086 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1087 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1088 return -1;
1089
1090 psmouse_dbg(psmouse, "Status: %2.2x %2.2x %2.2x",
1091 param[0], param[1], param[2]);
1092
1093 return 0;
1094 }
1095
1096 /*
1097 * Turn touchpad tapping on or off. The sequences are:
1098 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1099 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1100 * My guess that 0xE9 (GetInfo) is here as a sync point.
1101 * For models that also have stickpointer (DualPoints) its tapping
1102 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1103 * we don't fiddle with it.
1104 */
alps_tap_mode(struct psmouse * psmouse,int enable)1105 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1106 {
1107 struct ps2dev *ps2dev = &psmouse->ps2dev;
1108 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1109 unsigned char tap_arg = enable ? 0x0A : 0x00;
1110 unsigned char param[4];
1111
1112 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1113 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1114 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1115 ps2_command(ps2dev, &tap_arg, cmd))
1116 return -1;
1117
1118 if (alps_get_status(psmouse, param))
1119 return -1;
1120
1121 return 0;
1122 }
1123
1124 /*
1125 * alps_poll() - poll the touchpad for current motion packet.
1126 * Used in resync.
1127 */
alps_poll(struct psmouse * psmouse)1128 static int alps_poll(struct psmouse *psmouse)
1129 {
1130 struct alps_data *priv = psmouse->private;
1131 unsigned char buf[sizeof(psmouse->packet)];
1132 bool poll_failed;
1133
1134 if (priv->i->flags & ALPS_PASS)
1135 alps_passthrough_mode_v2(psmouse, true);
1136
1137 poll_failed = ps2_command(&psmouse->ps2dev, buf,
1138 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1139
1140 if (priv->i->flags & ALPS_PASS)
1141 alps_passthrough_mode_v2(psmouse, false);
1142
1143 if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
1144 return -1;
1145
1146 if ((psmouse->badbyte & 0xc8) == 0x08) {
1147 /*
1148 * Poll the track stick ...
1149 */
1150 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1151 return -1;
1152 }
1153
1154 memcpy(psmouse->packet, buf, sizeof(buf));
1155 return 0;
1156 }
1157
alps_hw_init_v1_v2(struct psmouse * psmouse)1158 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1159 {
1160 struct alps_data *priv = psmouse->private;
1161 const struct alps_model_info *model = priv->i;
1162
1163 if ((model->flags & ALPS_PASS) &&
1164 alps_passthrough_mode_v2(psmouse, true)) {
1165 return -1;
1166 }
1167
1168 if (alps_tap_mode(psmouse, true)) {
1169 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1170 return -1;
1171 }
1172
1173 if (alps_absolute_mode_v1_v2(psmouse)) {
1174 psmouse_err(psmouse, "Failed to enable absolute mode\n");
1175 return -1;
1176 }
1177
1178 if ((model->flags & ALPS_PASS) &&
1179 alps_passthrough_mode_v2(psmouse, false)) {
1180 return -1;
1181 }
1182
1183 /* ALPS needs stream mode, otherwise it won't report any data */
1184 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1185 psmouse_err(psmouse, "Failed to enable stream mode\n");
1186 return -1;
1187 }
1188
1189 return 0;
1190 }
1191
1192 /*
1193 * Enable or disable passthrough mode to the trackstick. Must be in
1194 * command mode when calling this function.
1195 */
alps_passthrough_mode_v3(struct psmouse * psmouse,bool enable)1196 static int alps_passthrough_mode_v3(struct psmouse *psmouse, bool enable)
1197 {
1198 int reg_val;
1199
1200 reg_val = alps_command_mode_read_reg(psmouse, 0x0008);
1201 if (reg_val == -1)
1202 return -1;
1203
1204 if (enable)
1205 reg_val |= 0x01;
1206 else
1207 reg_val &= ~0x01;
1208
1209 if (__alps_command_mode_write_reg(psmouse, reg_val))
1210 return -1;
1211
1212 return 0;
1213 }
1214
1215 /* Must be in command mode when calling this function */
alps_absolute_mode_v3(struct psmouse * psmouse)1216 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1217 {
1218 int reg_val;
1219
1220 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1221 if (reg_val == -1)
1222 return -1;
1223
1224 reg_val |= 0x06;
1225 if (__alps_command_mode_write_reg(psmouse, reg_val))
1226 return -1;
1227
1228 return 0;
1229 }
1230
alps_hw_init_v3(struct psmouse * psmouse)1231 static int alps_hw_init_v3(struct psmouse *psmouse)
1232 {
1233 struct alps_data *priv = psmouse->private;
1234 struct ps2dev *ps2dev = &psmouse->ps2dev;
1235 int reg_val;
1236 unsigned char param[4];
1237
1238 priv->nibble_commands = alps_v3_nibble_commands;
1239 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1240
1241 if (alps_enter_command_mode(psmouse, NULL))
1242 goto error;
1243
1244 /* Check for trackstick */
1245 reg_val = alps_command_mode_read_reg(psmouse, 0x0008);
1246 if (reg_val == -1)
1247 goto error;
1248 if (reg_val & 0x80) {
1249 if (alps_passthrough_mode_v3(psmouse, true))
1250 goto error;
1251 if (alps_exit_command_mode(psmouse))
1252 goto error;
1253
1254 /*
1255 * E7 report for the trackstick
1256 *
1257 * There have been reports of failures to seem to trace back
1258 * to the above trackstick check failing. When these occur
1259 * this E7 report fails, so when that happens we continue
1260 * with the assumption that there isn't a trackstick after
1261 * all.
1262 */
1263 param[0] = 0x64;
1264 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1265 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1266 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1267 ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
1268 psmouse_warn(psmouse, "trackstick E7 report failed\n");
1269 } else {
1270 psmouse_dbg(psmouse,
1271 "trackstick E7 report: %2.2x %2.2x %2.2x\n",
1272 param[0], param[1], param[2]);
1273
1274 /*
1275 * Not sure what this does, but it is absolutely
1276 * essential. Without it, the touchpad does not
1277 * work at all and the trackstick just emits normal
1278 * PS/2 packets.
1279 */
1280 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1281 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1282 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1283 alps_command_mode_send_nibble(psmouse, 0x9) ||
1284 alps_command_mode_send_nibble(psmouse, 0x4)) {
1285 psmouse_err(psmouse,
1286 "Error sending magic E6 sequence\n");
1287 goto error_passthrough;
1288 }
1289 }
1290
1291 if (alps_enter_command_mode(psmouse, NULL))
1292 goto error_passthrough;
1293 if (alps_passthrough_mode_v3(psmouse, false))
1294 goto error;
1295 }
1296
1297 if (alps_absolute_mode_v3(psmouse)) {
1298 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1299 goto error;
1300 }
1301
1302 reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1303 if (reg_val == -1)
1304 goto error;
1305 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1306 goto error;
1307
1308 reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1309 if (reg_val == -1)
1310 goto error;
1311 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1312 goto error;
1313
1314 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1315 goto error;
1316 if (__alps_command_mode_write_reg(psmouse, 0x04))
1317 goto error;
1318
1319 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1320 goto error;
1321 if (__alps_command_mode_write_reg(psmouse, 0x03))
1322 goto error;
1323
1324 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1325 goto error;
1326 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1327 goto error;
1328
1329 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1330 goto error;
1331 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1332 goto error;
1333
1334 /*
1335 * This ensures the trackstick packets are in the format
1336 * supported by this driver. If bit 1 isn't set the packet
1337 * format is different.
1338 */
1339 if (alps_command_mode_write_reg(psmouse, 0x0008, 0x82))
1340 goto error;
1341
1342 alps_exit_command_mode(psmouse);
1343
1344 /* Set rate and enable data reporting */
1345 param[0] = 0x64;
1346 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1347 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1348 psmouse_err(psmouse, "Failed to enable data reporting\n");
1349 return -1;
1350 }
1351
1352 return 0;
1353
1354 error_passthrough:
1355 /* Something failed while in passthrough mode, so try to get out */
1356 if (!alps_enter_command_mode(psmouse, NULL))
1357 alps_passthrough_mode_v3(psmouse, false);
1358 error:
1359 /*
1360 * Leaving the touchpad in command mode will essentially render
1361 * it unusable until the machine reboots, so exit it here just
1362 * to be safe
1363 */
1364 alps_exit_command_mode(psmouse);
1365 return -1;
1366 }
1367
1368 /* Must be in command mode when calling this function */
alps_absolute_mode_v4(struct psmouse * psmouse)1369 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1370 {
1371 int reg_val;
1372
1373 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1374 if (reg_val == -1)
1375 return -1;
1376
1377 reg_val |= 0x02;
1378 if (__alps_command_mode_write_reg(psmouse, reg_val))
1379 return -1;
1380
1381 return 0;
1382 }
1383
alps_hw_init_v4(struct psmouse * psmouse)1384 static int alps_hw_init_v4(struct psmouse *psmouse)
1385 {
1386 struct alps_data *priv = psmouse->private;
1387 struct ps2dev *ps2dev = &psmouse->ps2dev;
1388 unsigned char param[4];
1389
1390 priv->nibble_commands = alps_v4_nibble_commands;
1391 priv->addr_command = PSMOUSE_CMD_DISABLE;
1392
1393 if (alps_enter_command_mode(psmouse, NULL))
1394 goto error;
1395
1396 if (alps_absolute_mode_v4(psmouse)) {
1397 psmouse_err(psmouse, "Failed to enter absolute mode\n");
1398 goto error;
1399 }
1400
1401 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1402 goto error;
1403
1404 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1405 goto error;
1406
1407 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1408 goto error;
1409
1410 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1411 goto error;
1412
1413 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1414 goto error;
1415
1416 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1417 goto error;
1418
1419 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1420 goto error;
1421
1422 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1423 goto error;
1424
1425 alps_exit_command_mode(psmouse);
1426
1427 /*
1428 * This sequence changes the output from a 9-byte to an
1429 * 8-byte format. All the same data seems to be present,
1430 * just in a more compact format.
1431 */
1432 param[0] = 0xc8;
1433 param[1] = 0x64;
1434 param[2] = 0x50;
1435 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
1436 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) ||
1437 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) ||
1438 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1439 return -1;
1440
1441 /* Set rate and enable data reporting */
1442 param[0] = 0x64;
1443 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1444 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1445 psmouse_err(psmouse, "Failed to enable data reporting\n");
1446 return -1;
1447 }
1448
1449 return 0;
1450
1451 error:
1452 /*
1453 * Leaving the touchpad in command mode will essentially render
1454 * it unusable until the machine reboots, so exit it here just
1455 * to be safe
1456 */
1457 alps_exit_command_mode(psmouse);
1458 return -1;
1459 }
1460
alps_hw_init(struct psmouse * psmouse)1461 static int alps_hw_init(struct psmouse *psmouse)
1462 {
1463 struct alps_data *priv = psmouse->private;
1464 const struct alps_model_info *model = priv->i;
1465 int ret = -1;
1466
1467 switch (model->proto_version) {
1468 case ALPS_PROTO_V1:
1469 case ALPS_PROTO_V2:
1470 ret = alps_hw_init_v1_v2(psmouse);
1471 break;
1472 case ALPS_PROTO_V3:
1473 ret = alps_hw_init_v3(psmouse);
1474 break;
1475 case ALPS_PROTO_V4:
1476 ret = alps_hw_init_v4(psmouse);
1477 break;
1478 }
1479
1480 return ret;
1481 }
1482
alps_reconnect(struct psmouse * psmouse)1483 static int alps_reconnect(struct psmouse *psmouse)
1484 {
1485 const struct alps_model_info *model;
1486
1487 psmouse_reset(psmouse);
1488
1489 model = alps_get_model(psmouse, NULL);
1490 if (!model)
1491 return -1;
1492
1493 return alps_hw_init(psmouse);
1494 }
1495
alps_disconnect(struct psmouse * psmouse)1496 static void alps_disconnect(struct psmouse *psmouse)
1497 {
1498 struct alps_data *priv = psmouse->private;
1499
1500 psmouse_reset(psmouse);
1501 del_timer_sync(&priv->timer);
1502 input_unregister_device(priv->dev2);
1503 kfree(priv);
1504 }
1505
alps_init(struct psmouse * psmouse)1506 int alps_init(struct psmouse *psmouse)
1507 {
1508 struct alps_data *priv;
1509 const struct alps_model_info *model;
1510 struct input_dev *dev1 = psmouse->dev, *dev2;
1511 int version;
1512
1513 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
1514 dev2 = input_allocate_device();
1515 if (!priv || !dev2)
1516 goto init_fail;
1517
1518 priv->dev2 = dev2;
1519 setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
1520
1521 psmouse->private = priv;
1522
1523 psmouse_reset(psmouse);
1524
1525 model = alps_get_model(psmouse, &version);
1526 if (!model)
1527 goto init_fail;
1528
1529 priv->i = model;
1530
1531 if (alps_hw_init(psmouse))
1532 goto init_fail;
1533
1534 /*
1535 * Undo part of setup done for us by psmouse core since touchpad
1536 * is not a relative device.
1537 */
1538 __clear_bit(EV_REL, dev1->evbit);
1539 __clear_bit(REL_X, dev1->relbit);
1540 __clear_bit(REL_Y, dev1->relbit);
1541
1542 /*
1543 * Now set up our capabilities.
1544 */
1545 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
1546 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
1547 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
1548 dev1->keybit[BIT_WORD(BTN_LEFT)] |=
1549 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1550
1551 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
1552
1553 switch (model->proto_version) {
1554 case ALPS_PROTO_V1:
1555 case ALPS_PROTO_V2:
1556 input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
1557 input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
1558 break;
1559 case ALPS_PROTO_V3:
1560 set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
1561 input_mt_init_slots(dev1, 2);
1562 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, ALPS_V3_X_MAX, 0, 0);
1563 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, ALPS_V3_Y_MAX, 0, 0);
1564
1565 set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
1566 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
1567 set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
1568 /* fall through */
1569 case ALPS_PROTO_V4:
1570 input_set_abs_params(dev1, ABS_X, 0, ALPS_V3_X_MAX, 0, 0);
1571 input_set_abs_params(dev1, ABS_Y, 0, ALPS_V3_Y_MAX, 0, 0);
1572 break;
1573 }
1574
1575 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
1576
1577 if (model->flags & ALPS_WHEEL) {
1578 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
1579 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
1580 }
1581
1582 if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
1583 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
1584 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
1585 }
1586
1587 if (model->flags & ALPS_FOUR_BUTTONS) {
1588 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
1589 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
1590 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
1591 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
1592 } else {
1593 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
1594 }
1595
1596 snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
1597 dev2->phys = priv->phys;
1598 dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
1599 dev2->id.bustype = BUS_I8042;
1600 dev2->id.vendor = 0x0002;
1601 dev2->id.product = PSMOUSE_ALPS;
1602 dev2->id.version = 0x0000;
1603 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
1604
1605 dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1606 dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1607 dev2->keybit[BIT_WORD(BTN_LEFT)] =
1608 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1609
1610 if (input_register_device(priv->dev2))
1611 goto init_fail;
1612
1613 psmouse->protocol_handler = alps_process_byte;
1614 psmouse->poll = alps_poll;
1615 psmouse->disconnect = alps_disconnect;
1616 psmouse->reconnect = alps_reconnect;
1617 psmouse->pktsize = model->proto_version == ALPS_PROTO_V4 ? 8 : 6;
1618
1619 /* We are having trouble resyncing ALPS touchpads so disable it for now */
1620 psmouse->resync_time = 0;
1621
1622 return 0;
1623
1624 init_fail:
1625 psmouse_reset(psmouse);
1626 input_free_device(dev2);
1627 kfree(priv);
1628 psmouse->private = NULL;
1629 return -1;
1630 }
1631
alps_detect(struct psmouse * psmouse,bool set_properties)1632 int alps_detect(struct psmouse *psmouse, bool set_properties)
1633 {
1634 int version;
1635 const struct alps_model_info *model;
1636
1637 model = alps_get_model(psmouse, &version);
1638 if (!model)
1639 return -1;
1640
1641 if (set_properties) {
1642 psmouse->vendor = "ALPS";
1643 psmouse->name = model->flags & ALPS_DUALPOINT ?
1644 "DualPoint TouchPad" : "GlidePoint";
1645 psmouse->model = version;
1646 }
1647 return 0;
1648 }
1649
1650