1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * ALPS touchpad PS/2 mouse driver
4 *
5 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au>
6 * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com>
7 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru>
8 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz>
9 * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net>
10 *
11 * ALPS detection, tap switching and status querying info is taken from
12 * tpconfig utility (by C. Scott Ananian and Bruce Kall).
13 */
14
15 #include <linux/slab.h>
16 #include <linux/input.h>
17 #include <linux/input/mt.h>
18 #include <linux/serio.h>
19 #include <linux/libps2.h>
20 #include <linux/dmi.h>
21
22 #include "psmouse.h"
23 #include "alps.h"
24 #include "trackpoint.h"
25
26 /*
27 * Definitions for ALPS version 3 and 4 command mode protocol
28 */
29 #define ALPS_CMD_NIBBLE_10 0x01f2
30
31 #define ALPS_REG_BASE_RUSHMORE 0xc2c0
32 #define ALPS_REG_BASE_V7 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_STICK_BITS 0x100 /* separate stick button bits */
103 #define ALPS_BUTTONPAD 0x200 /* device is a clickpad */
104 #define ALPS_DUALPOINT_WITH_PRESSURE 0x400 /* device can report trackpoint pressure */
105
106 static const struct alps_model_info alps_model_data[] = {
107 /*
108 * XXX This entry is suspicious. First byte has zero lower nibble,
109 * which is what a normal mouse would report. Also, the value 0x0e
110 * isn't valid per PS/2 spec.
111 */
112 { { 0x20, 0x02, 0x0e }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
113
114 { { 0x22, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } },
115 { { 0x22, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D600 */
116 { { 0x32, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Toshiba Salellite Pro M10 */
117 { { 0x33, 0x02, 0x0a }, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } }, /* UMAX-530T */
118 { { 0x52, 0x01, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff,
119 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Toshiba Tecra A11-11L */
120 { { 0x53, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
121 { { 0x53, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
122 { { 0x60, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, /* HP ze1115 */
123 { { 0x62, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xcf, 0xcf,
124 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
125 { { 0x63, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
126 { { 0x63, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
127 { { 0x63, 0x02, 0x28 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Fujitsu Siemens S6010 */
128 { { 0x63, 0x02, 0x3c }, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } }, /* Toshiba Satellite S2400-103 */
129 { { 0x63, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } }, /* NEC Versa L320 */
130 { { 0x63, 0x02, 0x64 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
131 { { 0x63, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D800 */
132 { { 0x73, 0x00, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } }, /* ThinkPad R61 8918-5QG */
133 { { 0x73, 0x00, 0x14 }, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } }, /* Dell XT2 */
134 { { 0x73, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } },
135 { { 0x73, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Ahtec Laptop */
136 { { 0x73, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } }, /* Dell Vostro 1400 */
137 };
138
139 static const struct alps_protocol_info alps_v3_protocol_data = {
140 ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
141 };
142
143 static const struct alps_protocol_info alps_v3_rushmore_data = {
144 ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
145 };
146
147 static const struct alps_protocol_info alps_v4_protocol_data = {
148 ALPS_PROTO_V4, 0x8f, 0x8f, 0
149 };
150
151 static const struct alps_protocol_info alps_v5_protocol_data = {
152 ALPS_PROTO_V5, 0xc8, 0xd8, 0
153 };
154
155 static const struct alps_protocol_info alps_v7_protocol_data = {
156 ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE
157 };
158
159 static const struct alps_protocol_info alps_v8_protocol_data = {
160 ALPS_PROTO_V8, 0x18, 0x18, 0
161 };
162
163 static const struct alps_protocol_info alps_v9_protocol_data = {
164 ALPS_PROTO_V9, 0xc8, 0xc8, 0
165 };
166
167 /*
168 * Some v2 models report the stick buttons in separate bits
169 */
170 static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = {
171 #if defined(CONFIG_DMI) && defined(CONFIG_X86)
172 {
173 /* Extrapolated from other entries */
174 .matches = {
175 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
176 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"),
177 },
178 },
179 {
180 /* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */
181 .matches = {
182 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
183 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"),
184 },
185 },
186 {
187 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */
188 .matches = {
189 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
190 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"),
191 },
192 },
193 {
194 /* Extrapolated from other entries */
195 .matches = {
196 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."),
197 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"),
198 },
199 },
200 #endif
201 { }
202 };
203
204 static void alps_set_abs_params_st(struct alps_data *priv,
205 struct input_dev *dev1);
206 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
207 struct input_dev *dev1);
208 static void alps_set_abs_params_v7(struct alps_data *priv,
209 struct input_dev *dev1);
210 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
211 struct input_dev *dev1);
212
213 /* Packet formats are described in Documentation/input/devices/alps.rst */
214
alps_is_valid_first_byte(struct alps_data * priv,unsigned char data)215 static bool alps_is_valid_first_byte(struct alps_data *priv,
216 unsigned char data)
217 {
218 return (data & priv->mask0) == priv->byte0;
219 }
220
alps_report_buttons(struct input_dev * dev1,struct input_dev * dev2,int left,int right,int middle)221 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2,
222 int left, int right, int middle)
223 {
224 struct input_dev *dev;
225
226 /*
227 * If shared button has already been reported on the
228 * other device (dev2) then this event should be also
229 * sent through that device.
230 */
231 dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
232 input_report_key(dev, BTN_LEFT, left);
233
234 dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
235 input_report_key(dev, BTN_RIGHT, right);
236
237 dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
238 input_report_key(dev, BTN_MIDDLE, middle);
239
240 /*
241 * Sync the _other_ device now, we'll do the first
242 * device later once we report the rest of the events.
243 */
244 if (dev2)
245 input_sync(dev2);
246 }
247
alps_process_packet_v1_v2(struct psmouse * psmouse)248 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
249 {
250 struct alps_data *priv = psmouse->private;
251 unsigned char *packet = psmouse->packet;
252 struct input_dev *dev = psmouse->dev;
253 struct input_dev *dev2 = priv->dev2;
254 int x, y, z, ges, fin, left, right, middle;
255 int back = 0, forward = 0;
256
257 if (priv->proto_version == ALPS_PROTO_V1) {
258 left = packet[2] & 0x10;
259 right = packet[2] & 0x08;
260 middle = 0;
261 x = packet[1] | ((packet[0] & 0x07) << 7);
262 y = packet[4] | ((packet[3] & 0x07) << 7);
263 z = packet[5];
264 } else {
265 left = packet[3] & 1;
266 right = packet[3] & 2;
267 middle = packet[3] & 4;
268 x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
269 y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
270 z = packet[5];
271 }
272
273 if (priv->flags & ALPS_FW_BK_1) {
274 back = packet[0] & 0x10;
275 forward = packet[2] & 4;
276 }
277
278 if (priv->flags & ALPS_FW_BK_2) {
279 back = packet[3] & 4;
280 forward = packet[2] & 4;
281 if ((middle = forward && back))
282 forward = back = 0;
283 }
284
285 ges = packet[2] & 1;
286 fin = packet[2] & 2;
287
288 if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
289 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
290 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
291
292 alps_report_buttons(dev2, dev, left, right, middle);
293
294 input_sync(dev2);
295 return;
296 }
297
298 /* Some models have separate stick button bits */
299 if (priv->flags & ALPS_STICK_BITS) {
300 left |= packet[0] & 1;
301 right |= packet[0] & 2;
302 middle |= packet[0] & 4;
303 }
304
305 alps_report_buttons(dev, dev2, left, right, middle);
306
307 /* Convert hardware tap to a reasonable Z value */
308 if (ges && !fin)
309 z = 40;
310
311 /*
312 * A "tap and drag" operation is reported by the hardware as a transition
313 * from (!fin && ges) to (fin && ges). This should be translated to the
314 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
315 */
316 if (ges && fin && !priv->prev_fin) {
317 input_report_abs(dev, ABS_X, x);
318 input_report_abs(dev, ABS_Y, y);
319 input_report_abs(dev, ABS_PRESSURE, 0);
320 input_report_key(dev, BTN_TOOL_FINGER, 0);
321 input_sync(dev);
322 }
323 priv->prev_fin = fin;
324
325 if (z > 30)
326 input_report_key(dev, BTN_TOUCH, 1);
327 if (z < 25)
328 input_report_key(dev, BTN_TOUCH, 0);
329
330 if (z > 0) {
331 input_report_abs(dev, ABS_X, x);
332 input_report_abs(dev, ABS_Y, y);
333 }
334
335 input_report_abs(dev, ABS_PRESSURE, z);
336 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
337
338 if (priv->flags & ALPS_WHEEL)
339 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
340
341 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
342 input_report_key(dev, BTN_FORWARD, forward);
343 input_report_key(dev, BTN_BACK, back);
344 }
345
346 if (priv->flags & ALPS_FOUR_BUTTONS) {
347 input_report_key(dev, BTN_0, packet[2] & 4);
348 input_report_key(dev, BTN_1, packet[0] & 0x10);
349 input_report_key(dev, BTN_2, packet[3] & 4);
350 input_report_key(dev, BTN_3, packet[0] & 0x20);
351 }
352
353 input_sync(dev);
354 }
355
alps_get_bitmap_points(unsigned int map,struct alps_bitmap_point * low,struct alps_bitmap_point * high,int * fingers)356 static void alps_get_bitmap_points(unsigned int map,
357 struct alps_bitmap_point *low,
358 struct alps_bitmap_point *high,
359 int *fingers)
360 {
361 struct alps_bitmap_point *point;
362 int i, bit, prev_bit = 0;
363
364 point = low;
365 for (i = 0; map != 0; i++, map >>= 1) {
366 bit = map & 1;
367 if (bit) {
368 if (!prev_bit) {
369 point->start_bit = i;
370 point->num_bits = 0;
371 (*fingers)++;
372 }
373 point->num_bits++;
374 } else {
375 if (prev_bit)
376 point = high;
377 }
378 prev_bit = bit;
379 }
380 }
381
382 /*
383 * Process bitmap data from semi-mt protocols. Returns the number of
384 * fingers detected. A return value of 0 means at least one of the
385 * bitmaps was empty.
386 *
387 * The bitmaps don't have enough data to track fingers, so this function
388 * only generates points representing a bounding box of all contacts.
389 * These points are returned in fields->mt when the return value
390 * is greater than 0.
391 */
alps_process_bitmap(struct alps_data * priv,struct alps_fields * fields)392 static int alps_process_bitmap(struct alps_data *priv,
393 struct alps_fields *fields)
394 {
395 int i, fingers_x = 0, fingers_y = 0, fingers, closest;
396 struct alps_bitmap_point x_low = {0,}, x_high = {0,};
397 struct alps_bitmap_point y_low = {0,}, y_high = {0,};
398 struct input_mt_pos corner[4];
399
400 if (!fields->x_map || !fields->y_map)
401 return 0;
402
403 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x);
404 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y);
405
406 /*
407 * Fingers can overlap, so we use the maximum count of fingers
408 * on either axis as the finger count.
409 */
410 fingers = max(fingers_x, fingers_y);
411
412 /*
413 * If an axis reports only a single contact, we have overlapping or
414 * adjacent fingers. Divide the single contact between the two points.
415 */
416 if (fingers_x == 1) {
417 i = (x_low.num_bits - 1) / 2;
418 x_low.num_bits = x_low.num_bits - i;
419 x_high.start_bit = x_low.start_bit + i;
420 x_high.num_bits = max(i, 1);
421 }
422 if (fingers_y == 1) {
423 i = (y_low.num_bits - 1) / 2;
424 y_low.num_bits = y_low.num_bits - i;
425 y_high.start_bit = y_low.start_bit + i;
426 y_high.num_bits = max(i, 1);
427 }
428
429 /* top-left corner */
430 corner[0].x =
431 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
432 (2 * (priv->x_bits - 1));
433 corner[0].y =
434 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
435 (2 * (priv->y_bits - 1));
436
437 /* top-right corner */
438 corner[1].x =
439 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
440 (2 * (priv->x_bits - 1));
441 corner[1].y =
442 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
443 (2 * (priv->y_bits - 1));
444
445 /* bottom-right corner */
446 corner[2].x =
447 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
448 (2 * (priv->x_bits - 1));
449 corner[2].y =
450 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
451 (2 * (priv->y_bits - 1));
452
453 /* bottom-left corner */
454 corner[3].x =
455 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
456 (2 * (priv->x_bits - 1));
457 corner[3].y =
458 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) /
459 (2 * (priv->y_bits - 1));
460
461 /* x-bitmap order is reversed on v5 touchpads */
462 if (priv->proto_version == ALPS_PROTO_V5) {
463 for (i = 0; i < 4; i++)
464 corner[i].x = priv->x_max - corner[i].x;
465 }
466
467 /* y-bitmap order is reversed on v3 and v4 touchpads */
468 if (priv->proto_version == ALPS_PROTO_V3 ||
469 priv->proto_version == ALPS_PROTO_V4) {
470 for (i = 0; i < 4; i++)
471 corner[i].y = priv->y_max - corner[i].y;
472 }
473
474 /*
475 * We only select a corner for the second touch once per 2 finger
476 * touch sequence to avoid the chosen corner (and thus the coordinates)
477 * jumping around when the first touch is in the middle.
478 */
479 if (priv->second_touch == -1) {
480 /* Find corner closest to our st coordinates */
481 closest = 0x7fffffff;
482 for (i = 0; i < 4; i++) {
483 int dx = fields->st.x - corner[i].x;
484 int dy = fields->st.y - corner[i].y;
485 int distance = dx * dx + dy * dy;
486
487 if (distance < closest) {
488 priv->second_touch = i;
489 closest = distance;
490 }
491 }
492 /* And select the opposite corner to use for the 2nd touch */
493 priv->second_touch = (priv->second_touch + 2) % 4;
494 }
495
496 fields->mt[0] = fields->st;
497 fields->mt[1] = corner[priv->second_touch];
498
499 return fingers;
500 }
501
alps_set_slot(struct input_dev * dev,int slot,int x,int y)502 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
503 {
504 input_mt_slot(dev, slot);
505 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
506 input_report_abs(dev, ABS_MT_POSITION_X, x);
507 input_report_abs(dev, ABS_MT_POSITION_Y, y);
508 }
509
alps_report_mt_data(struct psmouse * psmouse,int n)510 static void alps_report_mt_data(struct psmouse *psmouse, int n)
511 {
512 struct alps_data *priv = psmouse->private;
513 struct input_dev *dev = psmouse->dev;
514 struct alps_fields *f = &priv->f;
515 int i, slot[MAX_TOUCHES];
516
517 input_mt_assign_slots(dev, slot, f->mt, n, 0);
518 for (i = 0; i < n; i++)
519 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
520
521 input_mt_sync_frame(dev);
522 }
523
alps_report_semi_mt_data(struct psmouse * psmouse,int fingers)524 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
525 {
526 struct alps_data *priv = psmouse->private;
527 struct input_dev *dev = psmouse->dev;
528 struct alps_fields *f = &priv->f;
529
530 /* Use st data when we don't have mt data */
531 if (fingers < 2) {
532 f->mt[0].x = f->st.x;
533 f->mt[0].y = f->st.y;
534 fingers = f->pressure > 0 ? 1 : 0;
535 priv->second_touch = -1;
536 }
537
538 if (fingers >= 1)
539 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
540 if (fingers >= 2)
541 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
542 input_mt_sync_frame(dev);
543
544 input_mt_report_finger_count(dev, fingers);
545
546 input_report_key(dev, BTN_LEFT, f->left);
547 input_report_key(dev, BTN_RIGHT, f->right);
548 input_report_key(dev, BTN_MIDDLE, f->middle);
549
550 input_report_abs(dev, ABS_PRESSURE, f->pressure);
551
552 input_sync(dev);
553 }
554
alps_process_trackstick_packet_v3(struct psmouse * psmouse)555 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
556 {
557 struct alps_data *priv = psmouse->private;
558 unsigned char *packet = psmouse->packet;
559 struct input_dev *dev = priv->dev2;
560 int x, y, z, left, right, middle;
561
562 /* It should be a DualPoint when received trackstick packet */
563 if (!(priv->flags & ALPS_DUALPOINT)) {
564 psmouse_warn(psmouse,
565 "Rejected trackstick packet from non DualPoint device");
566 return;
567 }
568
569 /* Sanity check packet */
570 if (!(packet[0] & 0x40)) {
571 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
572 return;
573 }
574
575 /*
576 * There's a special packet that seems to indicate the end
577 * of a stream of trackstick data. Filter these out.
578 */
579 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
580 return;
581
582 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
583 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
584 z = packet[4] & 0x7f;
585
586 /*
587 * The x and y values tend to be quite large, and when used
588 * alone the trackstick is difficult to use. Scale them down
589 * to compensate.
590 */
591 x /= 8;
592 y /= 8;
593
594 input_report_rel(dev, REL_X, x);
595 input_report_rel(dev, REL_Y, -y);
596 input_report_abs(dev, ABS_PRESSURE, z);
597
598 /*
599 * Most ALPS models report the trackstick buttons in the touchpad
600 * packets, but a few report them here. No reliable way has been
601 * found to differentiate between the models upfront, so we enable
602 * the quirk in response to seeing a button press in the trackstick
603 * packet.
604 */
605 left = packet[3] & 0x01;
606 right = packet[3] & 0x02;
607 middle = packet[3] & 0x04;
608
609 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
610 (left || right || middle))
611 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
612
613 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
614 input_report_key(dev, BTN_LEFT, left);
615 input_report_key(dev, BTN_RIGHT, right);
616 input_report_key(dev, BTN_MIDDLE, middle);
617 }
618
619 input_sync(dev);
620 return;
621 }
622
alps_decode_buttons_v3(struct alps_fields * f,unsigned char * p)623 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
624 {
625 f->left = !!(p[3] & 0x01);
626 f->right = !!(p[3] & 0x02);
627 f->middle = !!(p[3] & 0x04);
628
629 f->ts_left = !!(p[3] & 0x10);
630 f->ts_right = !!(p[3] & 0x20);
631 f->ts_middle = !!(p[3] & 0x40);
632 }
633
alps_decode_pinnacle(struct alps_fields * f,unsigned char * p,struct psmouse * psmouse)634 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
635 struct psmouse *psmouse)
636 {
637 f->first_mp = !!(p[4] & 0x40);
638 f->is_mp = !!(p[0] & 0x40);
639
640 if (f->is_mp) {
641 f->fingers = (p[5] & 0x3) + 1;
642 f->x_map = ((p[4] & 0x7e) << 8) |
643 ((p[1] & 0x7f) << 2) |
644 ((p[0] & 0x30) >> 4);
645 f->y_map = ((p[3] & 0x70) << 4) |
646 ((p[2] & 0x7f) << 1) |
647 (p[4] & 0x01);
648 } else {
649 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
650 ((p[0] & 0x30) >> 4);
651 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
652 f->pressure = p[5] & 0x7f;
653
654 alps_decode_buttons_v3(f, p);
655 }
656
657 return 0;
658 }
659
alps_decode_rushmore(struct alps_fields * f,unsigned char * p,struct psmouse * psmouse)660 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
661 struct psmouse *psmouse)
662 {
663 f->first_mp = !!(p[4] & 0x40);
664 f->is_mp = !!(p[5] & 0x40);
665
666 if (f->is_mp) {
667 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
668 f->x_map = ((p[5] & 0x10) << 11) |
669 ((p[4] & 0x7e) << 8) |
670 ((p[1] & 0x7f) << 2) |
671 ((p[0] & 0x30) >> 4);
672 f->y_map = ((p[5] & 0x20) << 6) |
673 ((p[3] & 0x70) << 4) |
674 ((p[2] & 0x7f) << 1) |
675 (p[4] & 0x01);
676 } else {
677 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
678 ((p[0] & 0x30) >> 4);
679 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
680 f->pressure = p[5] & 0x7f;
681
682 alps_decode_buttons_v3(f, p);
683 }
684
685 return 0;
686 }
687
alps_decode_dolphin(struct alps_fields * f,unsigned char * p,struct psmouse * psmouse)688 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
689 struct psmouse *psmouse)
690 {
691 u64 palm_data = 0;
692 struct alps_data *priv = psmouse->private;
693
694 f->first_mp = !!(p[0] & 0x02);
695 f->is_mp = !!(p[0] & 0x20);
696
697 if (!f->is_mp) {
698 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
699 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
700 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
701 alps_decode_buttons_v3(f, p);
702 } else {
703 f->fingers = ((p[0] & 0x6) >> 1 |
704 (p[0] & 0x10) >> 2);
705
706 palm_data = (p[1] & 0x7f) |
707 ((p[2] & 0x7f) << 7) |
708 ((p[4] & 0x7f) << 14) |
709 ((p[5] & 0x7f) << 21) |
710 ((p[3] & 0x07) << 28) |
711 (((u64)p[3] & 0x70) << 27) |
712 (((u64)p[0] & 0x01) << 34);
713
714 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
715 f->y_map = palm_data & (BIT(priv->y_bits) - 1);
716
717 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */
718 f->x_map = (palm_data >> priv->y_bits) &
719 (BIT(priv->x_bits) - 1);
720 }
721
722 return 0;
723 }
724
alps_process_touchpad_packet_v3_v5(struct psmouse * psmouse)725 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
726 {
727 struct alps_data *priv = psmouse->private;
728 unsigned char *packet = psmouse->packet;
729 struct input_dev *dev2 = priv->dev2;
730 struct alps_fields *f = &priv->f;
731 int fingers = 0;
732
733 memset(f, 0, sizeof(*f));
734
735 priv->decode_fields(f, packet, psmouse);
736
737 /*
738 * There's no single feature of touchpad position and bitmap packets
739 * that can be used to distinguish between them. We rely on the fact
740 * that a bitmap packet should always follow a position packet with
741 * bit 6 of packet[4] set.
742 */
743 if (priv->multi_packet) {
744 /*
745 * Sometimes a position packet will indicate a multi-packet
746 * sequence, but then what follows is another position
747 * packet. Check for this, and when it happens process the
748 * position packet as usual.
749 */
750 if (f->is_mp) {
751 fingers = f->fingers;
752 /*
753 * Bitmap processing uses position packet's coordinate
754 * data, so we need to do decode it first.
755 */
756 priv->decode_fields(f, priv->multi_data, psmouse);
757 if (alps_process_bitmap(priv, f) == 0)
758 fingers = 0; /* Use st data */
759 } else {
760 priv->multi_packet = 0;
761 }
762 }
763
764 /*
765 * Bit 6 of byte 0 is not usually set in position packets. The only
766 * times it seems to be set is in situations where the data is
767 * suspect anyway, e.g. a palm resting flat on the touchpad. Given
768 * this combined with the fact that this bit is useful for filtering
769 * out misidentified bitmap packets, we reject anything with this
770 * bit set.
771 */
772 if (f->is_mp)
773 return;
774
775 if (!priv->multi_packet && f->first_mp) {
776 priv->multi_packet = 1;
777 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
778 return;
779 }
780
781 priv->multi_packet = 0;
782
783 /*
784 * Sometimes the hardware sends a single packet with z = 0
785 * in the middle of a stream. Real releases generate packets
786 * with x, y, and z all zero, so these seem to be flukes.
787 * Ignore them.
788 */
789 if (f->st.x && f->st.y && !f->pressure)
790 return;
791
792 alps_report_semi_mt_data(psmouse, fingers);
793
794 if ((priv->flags & ALPS_DUALPOINT) &&
795 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
796 input_report_key(dev2, BTN_LEFT, f->ts_left);
797 input_report_key(dev2, BTN_RIGHT, f->ts_right);
798 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
799 input_sync(dev2);
800 }
801 }
802
alps_process_packet_v3(struct psmouse * psmouse)803 static void alps_process_packet_v3(struct psmouse *psmouse)
804 {
805 unsigned char *packet = psmouse->packet;
806
807 /*
808 * v3 protocol packets come in three types, two representing
809 * touchpad data and one representing trackstick data.
810 * Trackstick packets seem to be distinguished by always
811 * having 0x3f in the last byte. This value has never been
812 * observed in the last byte of either of the other types
813 * of packets.
814 */
815 if (packet[5] == 0x3f) {
816 alps_process_trackstick_packet_v3(psmouse);
817 return;
818 }
819
820 alps_process_touchpad_packet_v3_v5(psmouse);
821 }
822
alps_process_packet_v6(struct psmouse * psmouse)823 static void alps_process_packet_v6(struct psmouse *psmouse)
824 {
825 struct alps_data *priv = psmouse->private;
826 unsigned char *packet = psmouse->packet;
827 struct input_dev *dev = psmouse->dev;
828 struct input_dev *dev2 = priv->dev2;
829 int x, y, z;
830
831 /*
832 * We can use Byte5 to distinguish if the packet is from Touchpad
833 * or Trackpoint.
834 * Touchpad: 0 - 0x7E
835 * Trackpoint: 0x7F
836 */
837 if (packet[5] == 0x7F) {
838 /* It should be a DualPoint when received Trackpoint packet */
839 if (!(priv->flags & ALPS_DUALPOINT)) {
840 psmouse_warn(psmouse,
841 "Rejected trackstick packet from non DualPoint device");
842 return;
843 }
844
845 /* Trackpoint packet */
846 x = packet[1] | ((packet[3] & 0x20) << 2);
847 y = packet[2] | ((packet[3] & 0x40) << 1);
848 z = packet[4];
849
850 /* To prevent the cursor jump when finger lifted */
851 if (x == 0x7F && y == 0x7F && z == 0x7F)
852 x = y = z = 0;
853
854 /* Divide 4 since trackpoint's speed is too fast */
855 input_report_rel(dev2, REL_X, (s8)x / 4);
856 input_report_rel(dev2, REL_Y, -((s8)y / 4));
857
858 psmouse_report_standard_buttons(dev2, packet[3]);
859
860 input_sync(dev2);
861 return;
862 }
863
864 /* Touchpad packet */
865 x = packet[1] | ((packet[3] & 0x78) << 4);
866 y = packet[2] | ((packet[4] & 0x78) << 4);
867 z = packet[5];
868
869 if (z > 30)
870 input_report_key(dev, BTN_TOUCH, 1);
871 if (z < 25)
872 input_report_key(dev, BTN_TOUCH, 0);
873
874 if (z > 0) {
875 input_report_abs(dev, ABS_X, x);
876 input_report_abs(dev, ABS_Y, y);
877 }
878
879 input_report_abs(dev, ABS_PRESSURE, z);
880 input_report_key(dev, BTN_TOOL_FINGER, z > 0);
881
882 /* v6 touchpad does not have middle button */
883 packet[3] &= ~BIT(2);
884 psmouse_report_standard_buttons(dev2, packet[3]);
885
886 input_sync(dev);
887 }
888
alps_process_packet_v4(struct psmouse * psmouse)889 static void alps_process_packet_v4(struct psmouse *psmouse)
890 {
891 struct alps_data *priv = psmouse->private;
892 unsigned char *packet = psmouse->packet;
893 struct alps_fields *f = &priv->f;
894 int offset;
895
896 /*
897 * v4 has a 6-byte encoding for bitmap data, but this data is
898 * broken up between 3 normal packets. Use priv->multi_packet to
899 * track our position in the bitmap packet.
900 */
901 if (packet[6] & 0x40) {
902 /* sync, reset position */
903 priv->multi_packet = 0;
904 }
905
906 if (WARN_ON_ONCE(priv->multi_packet > 2))
907 return;
908
909 offset = 2 * priv->multi_packet;
910 priv->multi_data[offset] = packet[6];
911 priv->multi_data[offset + 1] = packet[7];
912
913 f->left = !!(packet[4] & 0x01);
914 f->right = !!(packet[4] & 0x02);
915
916 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
917 ((packet[0] & 0x30) >> 4);
918 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
919 f->pressure = packet[5] & 0x7f;
920
921 if (++priv->multi_packet > 2) {
922 priv->multi_packet = 0;
923
924 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
925 ((priv->multi_data[3] & 0x60) << 3) |
926 ((priv->multi_data[0] & 0x3f) << 2) |
927 ((priv->multi_data[1] & 0x60) >> 5);
928 f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
929 ((priv->multi_data[3] & 0x1f) << 5) |
930 (priv->multi_data[1] & 0x1f);
931
932 f->fingers = alps_process_bitmap(priv, f);
933 }
934
935 alps_report_semi_mt_data(psmouse, f->fingers);
936 }
937
alps_is_valid_package_v7(struct psmouse * psmouse)938 static bool alps_is_valid_package_v7(struct psmouse *psmouse)
939 {
940 switch (psmouse->pktcnt) {
941 case 3:
942 return (psmouse->packet[2] & 0x40) == 0x40;
943 case 4:
944 return (psmouse->packet[3] & 0x48) == 0x48;
945 case 6:
946 return (psmouse->packet[5] & 0x40) == 0x00;
947 }
948 return true;
949 }
950
alps_get_packet_id_v7(char * byte)951 static unsigned char alps_get_packet_id_v7(char *byte)
952 {
953 unsigned char packet_id;
954
955 if (byte[4] & 0x40)
956 packet_id = V7_PACKET_ID_TWO;
957 else if (byte[4] & 0x01)
958 packet_id = V7_PACKET_ID_MULTI;
959 else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
960 packet_id = V7_PACKET_ID_NEW;
961 else if (byte[1] == 0x00 && byte[4] == 0x00)
962 packet_id = V7_PACKET_ID_IDLE;
963 else
964 packet_id = V7_PACKET_ID_UNKNOWN;
965
966 return packet_id;
967 }
968
alps_get_finger_coordinate_v7(struct input_mt_pos * mt,unsigned char * pkt,unsigned char pkt_id)969 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
970 unsigned char *pkt,
971 unsigned char pkt_id)
972 {
973 mt[0].x = ((pkt[2] & 0x80) << 4);
974 mt[0].x |= ((pkt[2] & 0x3F) << 5);
975 mt[0].x |= ((pkt[3] & 0x30) >> 1);
976 mt[0].x |= (pkt[3] & 0x07);
977 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
978
979 mt[1].x = ((pkt[3] & 0x80) << 4);
980 mt[1].x |= ((pkt[4] & 0x80) << 3);
981 mt[1].x |= ((pkt[4] & 0x3F) << 4);
982 mt[1].y = ((pkt[5] & 0x80) << 3);
983 mt[1].y |= ((pkt[5] & 0x3F) << 4);
984
985 switch (pkt_id) {
986 case V7_PACKET_ID_TWO:
987 mt[1].x &= ~0x000F;
988 mt[1].y |= 0x000F;
989 /* Detect false-positive touches where x & y report max value */
990 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
991 mt[1].x = 0;
992 /* y gets set to 0 at the end of this function */
993 }
994 break;
995
996 case V7_PACKET_ID_MULTI:
997 mt[1].x &= ~0x003F;
998 mt[1].y &= ~0x0020;
999 mt[1].y |= ((pkt[4] & 0x02) << 4);
1000 mt[1].y |= 0x001F;
1001 break;
1002
1003 case V7_PACKET_ID_NEW:
1004 mt[1].x &= ~0x003F;
1005 mt[1].x |= (pkt[0] & 0x20);
1006 mt[1].y |= 0x000F;
1007 break;
1008 }
1009
1010 mt[0].y = 0x7FF - mt[0].y;
1011 mt[1].y = 0x7FF - mt[1].y;
1012 }
1013
alps_get_mt_count(struct input_mt_pos * mt)1014 static int alps_get_mt_count(struct input_mt_pos *mt)
1015 {
1016 int i, fingers = 0;
1017
1018 for (i = 0; i < MAX_TOUCHES; i++) {
1019 if (mt[i].x != 0 || mt[i].y != 0)
1020 fingers++;
1021 }
1022
1023 return fingers;
1024 }
1025
alps_decode_packet_v7(struct alps_fields * f,unsigned char * p,struct psmouse * psmouse)1026 static int alps_decode_packet_v7(struct alps_fields *f,
1027 unsigned char *p,
1028 struct psmouse *psmouse)
1029 {
1030 struct alps_data *priv = psmouse->private;
1031 unsigned char pkt_id;
1032
1033 pkt_id = alps_get_packet_id_v7(p);
1034 if (pkt_id == V7_PACKET_ID_IDLE)
1035 return 0;
1036 if (pkt_id == V7_PACKET_ID_UNKNOWN)
1037 return -1;
1038 /*
1039 * NEW packets are send to indicate a discontinuity in the finger
1040 * coordinate reporting. Specifically a finger may have moved from
1041 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for
1042 * us.
1043 *
1044 * NEW packets have 3 problems:
1045 * 1) They do not contain middle / right button info (on non clickpads)
1046 * this can be worked around by preserving the old button state
1047 * 2) They do not contain an accurate fingercount, and they are
1048 * typically send when the number of fingers changes. We cannot use
1049 * the old finger count as that may mismatch with the amount of
1050 * touch coordinates we've available in the NEW packet
1051 * 3) Their x data for the second touch is inaccurate leading to
1052 * a possible jump of the x coordinate by 16 units when the first
1053 * non NEW packet comes in
1054 * Since problems 2 & 3 cannot be worked around, just ignore them.
1055 */
1056 if (pkt_id == V7_PACKET_ID_NEW)
1057 return 1;
1058
1059 alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1060
1061 if (pkt_id == V7_PACKET_ID_TWO)
1062 f->fingers = alps_get_mt_count(f->mt);
1063 else /* pkt_id == V7_PACKET_ID_MULTI */
1064 f->fingers = 3 + (p[5] & 0x03);
1065
1066 f->left = (p[0] & 0x80) >> 7;
1067 if (priv->flags & ALPS_BUTTONPAD) {
1068 if (p[0] & 0x20)
1069 f->fingers++;
1070 if (p[0] & 0x10)
1071 f->fingers++;
1072 } else {
1073 f->right = (p[0] & 0x20) >> 5;
1074 f->middle = (p[0] & 0x10) >> 4;
1075 }
1076
1077 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1078 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1079 f->mt[0].x = f->mt[1].x;
1080 f->mt[0].y = f->mt[1].y;
1081 f->mt[1].x = 0;
1082 f->mt[1].y = 0;
1083 }
1084
1085 return 0;
1086 }
1087
alps_process_trackstick_packet_v7(struct psmouse * psmouse)1088 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1089 {
1090 struct alps_data *priv = psmouse->private;
1091 unsigned char *packet = psmouse->packet;
1092 struct input_dev *dev2 = priv->dev2;
1093 int x, y, z;
1094
1095 /* It should be a DualPoint when received trackstick packet */
1096 if (!(priv->flags & ALPS_DUALPOINT)) {
1097 psmouse_warn(psmouse,
1098 "Rejected trackstick packet from non DualPoint device");
1099 return;
1100 }
1101
1102 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1103 y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1104 ((packet[3] & 0x20) << 1);
1105 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1106
1107 input_report_rel(dev2, REL_X, (s8)x);
1108 input_report_rel(dev2, REL_Y, -((s8)y));
1109 input_report_abs(dev2, ABS_PRESSURE, z);
1110
1111 psmouse_report_standard_buttons(dev2, packet[1]);
1112
1113 input_sync(dev2);
1114 }
1115
alps_process_touchpad_packet_v7(struct psmouse * psmouse)1116 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1117 {
1118 struct alps_data *priv = psmouse->private;
1119 struct input_dev *dev = psmouse->dev;
1120 struct alps_fields *f = &priv->f;
1121
1122 memset(f, 0, sizeof(*f));
1123
1124 if (priv->decode_fields(f, psmouse->packet, psmouse))
1125 return;
1126
1127 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1128
1129 input_mt_report_finger_count(dev, f->fingers);
1130
1131 input_report_key(dev, BTN_LEFT, f->left);
1132 input_report_key(dev, BTN_RIGHT, f->right);
1133 input_report_key(dev, BTN_MIDDLE, f->middle);
1134
1135 input_sync(dev);
1136 }
1137
alps_process_packet_v7(struct psmouse * psmouse)1138 static void alps_process_packet_v7(struct psmouse *psmouse)
1139 {
1140 unsigned char *packet = psmouse->packet;
1141
1142 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1143 alps_process_trackstick_packet_v7(psmouse);
1144 else
1145 alps_process_touchpad_packet_v7(psmouse);
1146 }
1147
alps_get_pkt_id_ss4_v2(unsigned char * byte)1148 static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)
1149 {
1150 enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;
1151
1152 switch (byte[3] & 0x30) {
1153 case 0x00:
1154 if (SS4_IS_IDLE_V2(byte)) {
1155 pkt_id = SS4_PACKET_ID_IDLE;
1156 } else {
1157 pkt_id = SS4_PACKET_ID_ONE;
1158 }
1159 break;
1160 case 0x10:
1161 /* two-finger finger positions */
1162 pkt_id = SS4_PACKET_ID_TWO;
1163 break;
1164 case 0x20:
1165 /* stick pointer */
1166 pkt_id = SS4_PACKET_ID_STICK;
1167 break;
1168 case 0x30:
1169 /* third and fourth finger positions */
1170 pkt_id = SS4_PACKET_ID_MULTI;
1171 break;
1172 }
1173
1174 return pkt_id;
1175 }
1176
alps_decode_ss4_v2(struct alps_fields * f,unsigned char * p,struct psmouse * psmouse)1177 static int alps_decode_ss4_v2(struct alps_fields *f,
1178 unsigned char *p, struct psmouse *psmouse)
1179 {
1180 struct alps_data *priv = psmouse->private;
1181 enum SS4_PACKET_ID pkt_id;
1182 unsigned int no_data_x, no_data_y;
1183
1184 pkt_id = alps_get_pkt_id_ss4_v2(p);
1185
1186 /* Current packet is 1Finger coordinate packet */
1187 switch (pkt_id) {
1188 case SS4_PACKET_ID_ONE:
1189 f->mt[0].x = SS4_1F_X_V2(p);
1190 f->mt[0].y = SS4_1F_Y_V2(p);
1191 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f;
1192 /*
1193 * When a button is held the device will give us events
1194 * with x, y, and pressure of 0. This causes annoying jumps
1195 * if a touch is released while the button is held.
1196 * Handle this by claiming zero contacts.
1197 */
1198 f->fingers = f->pressure > 0 ? 1 : 0;
1199 f->first_mp = 0;
1200 f->is_mp = 0;
1201 break;
1202
1203 case SS4_PACKET_ID_TWO:
1204 if (priv->flags & ALPS_BUTTONPAD) {
1205 if (IS_SS4PLUS_DEV(priv->dev_id)) {
1206 f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1207 f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1208 } else {
1209 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1210 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1211 }
1212 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1213 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1214 } else {
1215 if (IS_SS4PLUS_DEV(priv->dev_id)) {
1216 f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1217 f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1218 } else {
1219 f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1220 f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1221 }
1222 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1223 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1224 }
1225 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1226
1227 if (SS4_IS_MF_CONTINUE(p)) {
1228 f->first_mp = 1;
1229 } else {
1230 f->fingers = 2;
1231 f->first_mp = 0;
1232 }
1233 f->is_mp = 0;
1234
1235 break;
1236
1237 case SS4_PACKET_ID_MULTI:
1238 if (priv->flags & ALPS_BUTTONPAD) {
1239 if (IS_SS4PLUS_DEV(priv->dev_id)) {
1240 f->mt[2].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1241 f->mt[3].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1242 no_data_x = SS4_PLUS_MFPACKET_NO_AX_BL;
1243 } else {
1244 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1245 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1246 no_data_x = SS4_MFPACKET_NO_AX_BL;
1247 }
1248 no_data_y = SS4_MFPACKET_NO_AY_BL;
1249
1250 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1251 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1252 } else {
1253 if (IS_SS4PLUS_DEV(priv->dev_id)) {
1254 f->mt[2].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1255 f->mt[3].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1256 no_data_x = SS4_PLUS_MFPACKET_NO_AX;
1257 } else {
1258 f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1259 f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1260 no_data_x = SS4_MFPACKET_NO_AX;
1261 }
1262 no_data_y = SS4_MFPACKET_NO_AY;
1263
1264 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1265 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1266 }
1267
1268 f->first_mp = 0;
1269 f->is_mp = 1;
1270
1271 if (SS4_IS_5F_DETECTED(p)) {
1272 f->fingers = 5;
1273 } else if (f->mt[3].x == no_data_x &&
1274 f->mt[3].y == no_data_y) {
1275 f->mt[3].x = 0;
1276 f->mt[3].y = 0;
1277 f->fingers = 3;
1278 } else {
1279 f->fingers = 4;
1280 }
1281 break;
1282
1283 case SS4_PACKET_ID_STICK:
1284 /*
1285 * x, y, and pressure are decoded in
1286 * alps_process_packet_ss4_v2()
1287 */
1288 f->first_mp = 0;
1289 f->is_mp = 0;
1290 break;
1291
1292 case SS4_PACKET_ID_IDLE:
1293 default:
1294 memset(f, 0, sizeof(struct alps_fields));
1295 break;
1296 }
1297
1298 /* handle buttons */
1299 if (pkt_id == SS4_PACKET_ID_STICK) {
1300 f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1301 f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1302 f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1303 } else {
1304 f->left = !!(SS4_BTN_V2(p) & 0x01);
1305 if (!(priv->flags & ALPS_BUTTONPAD)) {
1306 f->right = !!(SS4_BTN_V2(p) & 0x02);
1307 f->middle = !!(SS4_BTN_V2(p) & 0x04);
1308 }
1309 }
1310
1311 return 0;
1312 }
1313
alps_process_packet_ss4_v2(struct psmouse * psmouse)1314 static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1315 {
1316 struct alps_data *priv = psmouse->private;
1317 unsigned char *packet = psmouse->packet;
1318 struct input_dev *dev = psmouse->dev;
1319 struct input_dev *dev2 = priv->dev2;
1320 struct alps_fields *f = &priv->f;
1321
1322 memset(f, 0, sizeof(struct alps_fields));
1323 priv->decode_fields(f, packet, psmouse);
1324 if (priv->multi_packet) {
1325 /*
1326 * Sometimes the first packet will indicate a multi-packet
1327 * sequence, but sometimes the next multi-packet would not
1328 * come. Check for this, and when it happens process the
1329 * position packet as usual.
1330 */
1331 if (f->is_mp) {
1332 /* Now process the 1st packet */
1333 priv->decode_fields(f, priv->multi_data, psmouse);
1334 } else {
1335 priv->multi_packet = 0;
1336 }
1337 }
1338
1339 /*
1340 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet.
1341 * When it is set, it means 2nd packet comes without 1st packet come.
1342 */
1343 if (f->is_mp)
1344 return;
1345
1346 /* Save the first packet */
1347 if (!priv->multi_packet && f->first_mp) {
1348 priv->multi_packet = 1;
1349 memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1350 return;
1351 }
1352
1353 priv->multi_packet = 0;
1354
1355 /* Report trackstick */
1356 if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
1357 if (!(priv->flags & ALPS_DUALPOINT)) {
1358 psmouse_warn(psmouse,
1359 "Rejected trackstick packet from non DualPoint device");
1360 return;
1361 }
1362
1363 input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
1364 input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
1365 input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
1366
1367 input_report_key(dev2, BTN_LEFT, f->ts_left);
1368 input_report_key(dev2, BTN_RIGHT, f->ts_right);
1369 input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1370
1371 input_sync(dev2);
1372 return;
1373 }
1374
1375 /* Report touchpad */
1376 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1377
1378 input_mt_report_finger_count(dev, f->fingers);
1379
1380 input_report_key(dev, BTN_LEFT, f->left);
1381 input_report_key(dev, BTN_RIGHT, f->right);
1382 input_report_key(dev, BTN_MIDDLE, f->middle);
1383
1384 input_report_abs(dev, ABS_PRESSURE, f->pressure);
1385 input_sync(dev);
1386 }
1387
alps_is_valid_package_ss4_v2(struct psmouse * psmouse)1388 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1389 {
1390 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1391 return false;
1392 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1393 return false;
1394 return true;
1395 }
1396
1397 static DEFINE_MUTEX(alps_mutex);
1398
alps_do_register_bare_ps2_mouse(struct alps_data * priv)1399 static int alps_do_register_bare_ps2_mouse(struct alps_data *priv)
1400 {
1401 struct psmouse *psmouse = priv->psmouse;
1402 struct input_dev *dev3;
1403 int error;
1404
1405 dev3 = input_allocate_device();
1406 if (!dev3) {
1407 psmouse_err(psmouse, "failed to allocate secondary device\n");
1408 return -ENOMEM;
1409 }
1410
1411 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1412 psmouse->ps2dev.serio->phys,
1413 (priv->dev2 ? "input2" : "input1"));
1414 dev3->phys = priv->phys3;
1415
1416 /*
1417 * format of input device name is: "protocol vendor name"
1418 * see function psmouse_switch_protocol() in psmouse-base.c
1419 */
1420 dev3->name = "PS/2 ALPS Mouse";
1421
1422 dev3->id.bustype = BUS_I8042;
1423 dev3->id.vendor = 0x0002;
1424 dev3->id.product = PSMOUSE_PS2;
1425 dev3->id.version = 0x0000;
1426 dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1427
1428 input_set_capability(dev3, EV_REL, REL_X);
1429 input_set_capability(dev3, EV_REL, REL_Y);
1430 input_set_capability(dev3, EV_KEY, BTN_LEFT);
1431 input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1432 input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1433
1434 __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1435
1436 error = input_register_device(dev3);
1437 if (error) {
1438 psmouse_err(psmouse,
1439 "failed to register secondary device: %d\n",
1440 error);
1441 goto err_free_input;
1442 }
1443
1444 priv->dev3 = dev3;
1445 return 0;
1446
1447 err_free_input:
1448 input_free_device(dev3);
1449 return error;
1450 }
1451
alps_register_bare_ps2_mouse(struct work_struct * work)1452 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1453 {
1454 struct alps_data *priv = container_of(work, struct alps_data,
1455 dev3_register_work.work);
1456 int error;
1457
1458 guard(mutex)(&alps_mutex);
1459
1460 if (!priv->dev3) {
1461 error = alps_do_register_bare_ps2_mouse(priv);
1462 if (error) {
1463 /*
1464 * Save the error code so that we can detect that we
1465 * already tried to create the device.
1466 */
1467 priv->dev3 = ERR_PTR(error);
1468 }
1469 }
1470 }
1471
alps_report_bare_ps2_packet(struct psmouse * psmouse,unsigned char packet[],bool report_buttons)1472 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1473 unsigned char packet[],
1474 bool report_buttons)
1475 {
1476 struct alps_data *priv = psmouse->private;
1477 struct input_dev *dev, *dev2 = NULL;
1478
1479 /* Figure out which device to use to report the bare packet */
1480 if (priv->proto_version == ALPS_PROTO_V2 &&
1481 (priv->flags & ALPS_DUALPOINT)) {
1482 /* On V2 devices the DualPoint Stick reports bare packets */
1483 dev = priv->dev2;
1484 dev2 = psmouse->dev;
1485 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1486 /* Register dev3 mouse if we received PS/2 packet first time */
1487 if (!IS_ERR(priv->dev3))
1488 psmouse_queue_work(psmouse, &priv->dev3_register_work,
1489 0);
1490 return;
1491 } else {
1492 dev = priv->dev3;
1493 }
1494
1495 if (report_buttons)
1496 alps_report_buttons(dev, dev2,
1497 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1498
1499 psmouse_report_standard_motion(dev, packet);
1500
1501 input_sync(dev);
1502 }
1503
alps_handle_interleaved_ps2(struct psmouse * psmouse)1504 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1505 {
1506 struct alps_data *priv = psmouse->private;
1507
1508 if (psmouse->pktcnt < 6)
1509 return PSMOUSE_GOOD_DATA;
1510
1511 if (psmouse->pktcnt == 6) {
1512 /*
1513 * Start a timer to flush the packet if it ends up last
1514 * 6-byte packet in the stream. Timer needs to fire
1515 * psmouse core times out itself. 20 ms should be enough
1516 * to decide if we are getting more data or not.
1517 */
1518 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1519 return PSMOUSE_GOOD_DATA;
1520 }
1521
1522 del_timer(&priv->timer);
1523
1524 if (psmouse->packet[6] & 0x80) {
1525
1526 /*
1527 * Highest bit is set - that means we either had
1528 * complete ALPS packet and this is start of the
1529 * next packet or we got garbage.
1530 */
1531
1532 if (((psmouse->packet[3] |
1533 psmouse->packet[4] |
1534 psmouse->packet[5]) & 0x80) ||
1535 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1536 psmouse_dbg(psmouse,
1537 "refusing packet %4ph (suspected interleaved ps/2)\n",
1538 psmouse->packet + 3);
1539 return PSMOUSE_BAD_DATA;
1540 }
1541
1542 priv->process_packet(psmouse);
1543
1544 /* Continue with the next packet */
1545 psmouse->packet[0] = psmouse->packet[6];
1546 psmouse->pktcnt = 1;
1547
1548 } else {
1549
1550 /*
1551 * High bit is 0 - that means that we indeed got a PS/2
1552 * packet in the middle of ALPS packet.
1553 *
1554 * There is also possibility that we got 6-byte ALPS
1555 * packet followed by 3-byte packet from trackpoint. We
1556 * can not distinguish between these 2 scenarios but
1557 * because the latter is unlikely to happen in course of
1558 * normal operation (user would need to press all
1559 * buttons on the pad and start moving trackpoint
1560 * without touching the pad surface) we assume former.
1561 * Even if we are wrong the wost thing that would happen
1562 * the cursor would jump but we should not get protocol
1563 * de-synchronization.
1564 */
1565
1566 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1567 false);
1568
1569 /*
1570 * Continue with the standard ALPS protocol handling,
1571 * but make sure we won't process it as an interleaved
1572 * packet again, which may happen if all buttons are
1573 * pressed. To avoid this let's reset the 4th bit which
1574 * is normally 1.
1575 */
1576 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1577 psmouse->pktcnt = 4;
1578 }
1579
1580 return PSMOUSE_GOOD_DATA;
1581 }
1582
alps_flush_packet(struct timer_list * t)1583 static void alps_flush_packet(struct timer_list *t)
1584 {
1585 struct alps_data *priv = from_timer(priv, t, timer);
1586 struct psmouse *psmouse = priv->psmouse;
1587
1588 serio_pause_rx(psmouse->ps2dev.serio);
1589
1590 if (psmouse->pktcnt == psmouse->pktsize) {
1591
1592 /*
1593 * We did not any more data in reasonable amount of time.
1594 * Validate the last 3 bytes and process as a standard
1595 * ALPS packet.
1596 */
1597 if ((psmouse->packet[3] |
1598 psmouse->packet[4] |
1599 psmouse->packet[5]) & 0x80) {
1600 psmouse_dbg(psmouse,
1601 "refusing packet %3ph (suspected interleaved ps/2)\n",
1602 psmouse->packet + 3);
1603 } else {
1604 priv->process_packet(psmouse);
1605 }
1606 psmouse->pktcnt = 0;
1607 }
1608
1609 serio_continue_rx(psmouse->ps2dev.serio);
1610 }
1611
alps_process_byte(struct psmouse * psmouse)1612 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1613 {
1614 struct alps_data *priv = psmouse->private;
1615
1616 /*
1617 * Check if we are dealing with a bare PS/2 packet, presumably from
1618 * a device connected to the external PS/2 port. Because bare PS/2
1619 * protocol does not have enough constant bits to self-synchronize
1620 * properly we only do this if the device is fully synchronized.
1621 * Can not distinguish V8's first byte from PS/2 packet's
1622 */
1623 if (priv->proto_version != ALPS_PROTO_V8 &&
1624 !psmouse->out_of_sync_cnt &&
1625 (psmouse->packet[0] & 0xc8) == 0x08) {
1626
1627 if (psmouse->pktcnt == 3) {
1628 alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1629 true);
1630 return PSMOUSE_FULL_PACKET;
1631 }
1632 return PSMOUSE_GOOD_DATA;
1633 }
1634
1635 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1636
1637 if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1638 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1639 return alps_handle_interleaved_ps2(psmouse);
1640 }
1641
1642 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1643 psmouse_dbg(psmouse,
1644 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1645 psmouse->packet[0], priv->mask0, priv->byte0);
1646 return PSMOUSE_BAD_DATA;
1647 }
1648
1649 /* Bytes 2 - pktsize should have 0 in the highest bit */
1650 if (priv->proto_version < ALPS_PROTO_V5 &&
1651 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1652 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1653 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1654 psmouse->pktcnt - 1,
1655 psmouse->packet[psmouse->pktcnt - 1]);
1656
1657 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1658 psmouse->pktcnt == psmouse->pktsize) {
1659 /*
1660 * Some Dell boxes, such as Latitude E6440 or E7440
1661 * with closed lid, quite often smash last byte of
1662 * otherwise valid packet with 0xff. Given that the
1663 * next packet is very likely to be valid let's
1664 * report PSMOUSE_FULL_PACKET but not process data,
1665 * rather than reporting PSMOUSE_BAD_DATA and
1666 * filling the logs.
1667 */
1668 return PSMOUSE_FULL_PACKET;
1669 }
1670
1671 return PSMOUSE_BAD_DATA;
1672 }
1673
1674 if ((priv->proto_version == ALPS_PROTO_V7 &&
1675 !alps_is_valid_package_v7(psmouse)) ||
1676 (priv->proto_version == ALPS_PROTO_V8 &&
1677 !alps_is_valid_package_ss4_v2(psmouse))) {
1678 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1679 psmouse->pktcnt - 1,
1680 psmouse->packet[psmouse->pktcnt - 1]);
1681 return PSMOUSE_BAD_DATA;
1682 }
1683
1684 if (psmouse->pktcnt == psmouse->pktsize) {
1685 priv->process_packet(psmouse);
1686 return PSMOUSE_FULL_PACKET;
1687 }
1688
1689 return PSMOUSE_GOOD_DATA;
1690 }
1691
alps_command_mode_send_nibble(struct psmouse * psmouse,int nibble)1692 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1693 {
1694 struct ps2dev *ps2dev = &psmouse->ps2dev;
1695 struct alps_data *priv = psmouse->private;
1696 int command;
1697 unsigned char *param;
1698 unsigned char dummy[4];
1699
1700 BUG_ON(nibble > 0xf);
1701
1702 command = priv->nibble_commands[nibble].command;
1703 param = (command & 0x0f00) ?
1704 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1705
1706 if (ps2_command(ps2dev, param, command))
1707 return -1;
1708
1709 return 0;
1710 }
1711
alps_command_mode_set_addr(struct psmouse * psmouse,int addr)1712 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1713 {
1714 struct ps2dev *ps2dev = &psmouse->ps2dev;
1715 struct alps_data *priv = psmouse->private;
1716 int i, nibble;
1717
1718 if (ps2_command(ps2dev, NULL, priv->addr_command))
1719 return -1;
1720
1721 for (i = 12; i >= 0; i -= 4) {
1722 nibble = (addr >> i) & 0xf;
1723 if (alps_command_mode_send_nibble(psmouse, nibble))
1724 return -1;
1725 }
1726
1727 return 0;
1728 }
1729
__alps_command_mode_read_reg(struct psmouse * psmouse,int addr)1730 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1731 {
1732 struct ps2dev *ps2dev = &psmouse->ps2dev;
1733 unsigned char param[4];
1734
1735 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1736 return -1;
1737
1738 /*
1739 * The address being read is returned in the first two bytes
1740 * of the result. Check that this address matches the expected
1741 * address.
1742 */
1743 if (addr != ((param[0] << 8) | param[1]))
1744 return -1;
1745
1746 return param[2];
1747 }
1748
alps_command_mode_read_reg(struct psmouse * psmouse,int addr)1749 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1750 {
1751 if (alps_command_mode_set_addr(psmouse, addr))
1752 return -1;
1753 return __alps_command_mode_read_reg(psmouse, addr);
1754 }
1755
__alps_command_mode_write_reg(struct psmouse * psmouse,u8 value)1756 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1757 {
1758 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1759 return -1;
1760 if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1761 return -1;
1762 return 0;
1763 }
1764
alps_command_mode_write_reg(struct psmouse * psmouse,int addr,u8 value)1765 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1766 u8 value)
1767 {
1768 if (alps_command_mode_set_addr(psmouse, addr))
1769 return -1;
1770 return __alps_command_mode_write_reg(psmouse, value);
1771 }
1772
alps_rpt_cmd(struct psmouse * psmouse,int init_command,int repeated_command,unsigned char * param)1773 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1774 int repeated_command, unsigned char *param)
1775 {
1776 struct ps2dev *ps2dev = &psmouse->ps2dev;
1777
1778 param[0] = 0;
1779 if (init_command && ps2_command(ps2dev, param, init_command))
1780 return -EIO;
1781
1782 if (ps2_command(ps2dev, NULL, repeated_command) ||
1783 ps2_command(ps2dev, NULL, repeated_command) ||
1784 ps2_command(ps2dev, NULL, repeated_command))
1785 return -EIO;
1786
1787 param[0] = param[1] = param[2] = 0xff;
1788 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1789 return -EIO;
1790
1791 psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1792 repeated_command, param);
1793 return 0;
1794 }
1795
alps_check_valid_firmware_id(unsigned char id[])1796 static bool alps_check_valid_firmware_id(unsigned char id[])
1797 {
1798 if (id[0] == 0x73)
1799 return true;
1800
1801 if (id[0] == 0x88 &&
1802 (id[1] == 0x07 ||
1803 id[1] == 0x08 ||
1804 (id[1] & 0xf0) == 0xb0 ||
1805 (id[1] & 0xf0) == 0xc0)) {
1806 return true;
1807 }
1808
1809 return false;
1810 }
1811
alps_enter_command_mode(struct psmouse * psmouse)1812 static int alps_enter_command_mode(struct psmouse *psmouse)
1813 {
1814 unsigned char param[4];
1815
1816 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1817 psmouse_err(psmouse, "failed to enter command mode\n");
1818 return -1;
1819 }
1820
1821 if (!alps_check_valid_firmware_id(param)) {
1822 psmouse_dbg(psmouse,
1823 "unknown response while entering command mode\n");
1824 return -1;
1825 }
1826 return 0;
1827 }
1828
alps_exit_command_mode(struct psmouse * psmouse)1829 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1830 {
1831 struct ps2dev *ps2dev = &psmouse->ps2dev;
1832 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1833 return -1;
1834 return 0;
1835 }
1836
1837 /*
1838 * For DualPoint devices select the device that should respond to
1839 * subsequent commands. It looks like glidepad is behind stickpointer,
1840 * I'd thought it would be other way around...
1841 */
alps_passthrough_mode_v2(struct psmouse * psmouse,bool enable)1842 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1843 {
1844 struct ps2dev *ps2dev = &psmouse->ps2dev;
1845 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1846
1847 if (ps2_command(ps2dev, NULL, cmd) ||
1848 ps2_command(ps2dev, NULL, cmd) ||
1849 ps2_command(ps2dev, NULL, cmd) ||
1850 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1851 return -1;
1852
1853 /* we may get 3 more bytes, just ignore them */
1854 ps2_drain(ps2dev, 3, 100);
1855
1856 return 0;
1857 }
1858
alps_absolute_mode_v1_v2(struct psmouse * psmouse)1859 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1860 {
1861 struct ps2dev *ps2dev = &psmouse->ps2dev;
1862
1863 /* Try ALPS magic knock - 4 disable before enable */
1864 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1865 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1866 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1867 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1868 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1869 return -1;
1870
1871 /*
1872 * Switch mouse to poll (remote) mode so motion data will not
1873 * get in our way
1874 */
1875 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1876 }
1877
alps_monitor_mode_send_word(struct psmouse * psmouse,u16 word)1878 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1879 {
1880 int i, nibble;
1881
1882 /*
1883 * b0-b11 are valid bits, send sequence is inverse.
1884 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1885 */
1886 for (i = 0; i <= 8; i += 4) {
1887 nibble = (word >> i) & 0xf;
1888 if (alps_command_mode_send_nibble(psmouse, nibble))
1889 return -1;
1890 }
1891
1892 return 0;
1893 }
1894
alps_monitor_mode_write_reg(struct psmouse * psmouse,u16 addr,u16 value)1895 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1896 u16 addr, u16 value)
1897 {
1898 struct ps2dev *ps2dev = &psmouse->ps2dev;
1899
1900 /* 0x0A0 is the command to write the word */
1901 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1902 alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1903 alps_monitor_mode_send_word(psmouse, addr) ||
1904 alps_monitor_mode_send_word(psmouse, value) ||
1905 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1906 return -1;
1907
1908 return 0;
1909 }
1910
alps_monitor_mode(struct psmouse * psmouse,bool enable)1911 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1912 {
1913 struct ps2dev *ps2dev = &psmouse->ps2dev;
1914
1915 if (enable) {
1916 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1917 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1918 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1919 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1920 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1921 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1922 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1923 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1924 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1925 return -1;
1926 } else {
1927 /* EC to exit monitor mode */
1928 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1929 return -1;
1930 }
1931
1932 return 0;
1933 }
1934
alps_absolute_mode_v6(struct psmouse * psmouse)1935 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1936 {
1937 u16 reg_val = 0x181;
1938 int ret;
1939
1940 /* enter monitor mode, to write the register */
1941 if (alps_monitor_mode(psmouse, true))
1942 return -1;
1943
1944 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1945
1946 if (alps_monitor_mode(psmouse, false))
1947 ret = -1;
1948
1949 return ret;
1950 }
1951
alps_get_status(struct psmouse * psmouse,char * param)1952 static int alps_get_status(struct psmouse *psmouse, char *param)
1953 {
1954 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1955 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1956 return -1;
1957
1958 return 0;
1959 }
1960
1961 /*
1962 * Turn touchpad tapping on or off. The sequences are:
1963 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1964 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1965 * My guess that 0xE9 (GetInfo) is here as a sync point.
1966 * For models that also have stickpointer (DualPoints) its tapping
1967 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1968 * we don't fiddle with it.
1969 */
alps_tap_mode(struct psmouse * psmouse,int enable)1970 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1971 {
1972 struct ps2dev *ps2dev = &psmouse->ps2dev;
1973 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1974 unsigned char tap_arg = enable ? 0x0A : 0x00;
1975 unsigned char param[4];
1976
1977 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1978 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1979 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1980 ps2_command(ps2dev, &tap_arg, cmd))
1981 return -1;
1982
1983 if (alps_get_status(psmouse, param))
1984 return -1;
1985
1986 return 0;
1987 }
1988
1989 /*
1990 * alps_poll() - poll the touchpad for current motion packet.
1991 * Used in resync.
1992 */
alps_poll(struct psmouse * psmouse)1993 static int alps_poll(struct psmouse *psmouse)
1994 {
1995 struct alps_data *priv = psmouse->private;
1996 unsigned char buf[sizeof(psmouse->packet)];
1997 bool poll_failed;
1998
1999 if (priv->flags & ALPS_PASS)
2000 alps_passthrough_mode_v2(psmouse, true);
2001
2002 poll_failed = ps2_command(&psmouse->ps2dev, buf,
2003 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
2004
2005 if (priv->flags & ALPS_PASS)
2006 alps_passthrough_mode_v2(psmouse, false);
2007
2008 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
2009 return -1;
2010
2011 if ((psmouse->badbyte & 0xc8) == 0x08) {
2012 /*
2013 * Poll the track stick ...
2014 */
2015 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
2016 return -1;
2017 }
2018
2019 memcpy(psmouse->packet, buf, sizeof(buf));
2020 return 0;
2021 }
2022
alps_hw_init_v1_v2(struct psmouse * psmouse)2023 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2024 {
2025 struct alps_data *priv = psmouse->private;
2026
2027 if ((priv->flags & ALPS_PASS) &&
2028 alps_passthrough_mode_v2(psmouse, true)) {
2029 return -1;
2030 }
2031
2032 if (alps_tap_mode(psmouse, true)) {
2033 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2034 return -1;
2035 }
2036
2037 if (alps_absolute_mode_v1_v2(psmouse)) {
2038 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2039 return -1;
2040 }
2041
2042 if ((priv->flags & ALPS_PASS) &&
2043 alps_passthrough_mode_v2(psmouse, false)) {
2044 return -1;
2045 }
2046
2047 /* ALPS needs stream mode, otherwise it won't report any data */
2048 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2049 psmouse_err(psmouse, "Failed to enable stream mode\n");
2050 return -1;
2051 }
2052
2053 return 0;
2054 }
2055
2056 /* Must be in passthrough mode when calling this function */
alps_trackstick_enter_extended_mode_v3_v6(struct psmouse * psmouse)2057 static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse)
2058 {
2059 unsigned char param[2] = {0xC8, 0x14};
2060
2061 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2062 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2063 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2064 ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2065 ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2066 return -1;
2067
2068 return 0;
2069 }
2070
alps_hw_init_v6(struct psmouse * psmouse)2071 static int alps_hw_init_v6(struct psmouse *psmouse)
2072 {
2073 int ret;
2074
2075 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2076 if (alps_passthrough_mode_v2(psmouse, true))
2077 return -1;
2078
2079 ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse);
2080
2081 if (alps_passthrough_mode_v2(psmouse, false))
2082 return -1;
2083
2084 if (ret)
2085 return ret;
2086
2087 if (alps_absolute_mode_v6(psmouse)) {
2088 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2089 return -1;
2090 }
2091
2092 return 0;
2093 }
2094
2095 /*
2096 * Enable or disable passthrough mode to the trackstick.
2097 */
alps_passthrough_mode_v3(struct psmouse * psmouse,int reg_base,bool enable)2098 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2099 int reg_base, bool enable)
2100 {
2101 int reg_val, ret = -1;
2102
2103 if (alps_enter_command_mode(psmouse))
2104 return -1;
2105
2106 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2107 if (reg_val == -1)
2108 goto error;
2109
2110 if (enable)
2111 reg_val |= 0x01;
2112 else
2113 reg_val &= ~0x01;
2114
2115 ret = __alps_command_mode_write_reg(psmouse, reg_val);
2116
2117 error:
2118 if (alps_exit_command_mode(psmouse))
2119 ret = -1;
2120 return ret;
2121 }
2122
2123 /* Must be in command mode when calling this function */
alps_absolute_mode_v3(struct psmouse * psmouse)2124 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2125 {
2126 int reg_val;
2127
2128 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2129 if (reg_val == -1)
2130 return -1;
2131
2132 reg_val |= 0x06;
2133 if (__alps_command_mode_write_reg(psmouse, reg_val))
2134 return -1;
2135
2136 return 0;
2137 }
2138
alps_probe_trackstick_v3_v7(struct psmouse * psmouse,int reg_base)2139 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2140 {
2141 int ret = -EIO, reg_val;
2142
2143 if (alps_enter_command_mode(psmouse))
2144 goto error;
2145
2146 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2147 if (reg_val == -1)
2148 goto error;
2149
2150 /* bit 7: trackstick is present */
2151 ret = reg_val & 0x80 ? 0 : -ENODEV;
2152
2153 error:
2154 alps_exit_command_mode(psmouse);
2155 return ret;
2156 }
2157
alps_setup_trackstick_v3(struct psmouse * psmouse,int reg_base)2158 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2159 {
2160 int ret = 0;
2161 int reg_val;
2162 unsigned char param[4];
2163
2164 /*
2165 * We need to configure trackstick to report data for touchpad in
2166 * extended format. And also we need to tell touchpad to expect data
2167 * from trackstick in extended format. Without this configuration
2168 * trackstick packets sent from touchpad are in basic format which is
2169 * different from what we expect.
2170 */
2171
2172 if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2173 return -EIO;
2174
2175 /*
2176 * E7 report for the trackstick
2177 *
2178 * There have been reports of failures to seem to trace back
2179 * to the above trackstick check failing. When these occur
2180 * this E7 report fails, so when that happens we continue
2181 * with the assumption that there isn't a trackstick after
2182 * all.
2183 */
2184 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2185 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2186 ret = -ENODEV;
2187 } else {
2188 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2189 if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) {
2190 psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n");
2191 ret = -EIO;
2192 }
2193 }
2194
2195 if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2196 return -EIO;
2197
2198 if (ret)
2199 return ret;
2200
2201 if (alps_enter_command_mode(psmouse))
2202 return -EIO;
2203
2204 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2205 if (reg_val == -1) {
2206 ret = -EIO;
2207 } else {
2208 /*
2209 * Tell touchpad that trackstick is now in extended mode.
2210 * If bit 1 isn't set the packet format is different.
2211 */
2212 reg_val |= BIT(1);
2213 if (__alps_command_mode_write_reg(psmouse, reg_val))
2214 ret = -EIO;
2215 }
2216
2217 if (alps_exit_command_mode(psmouse))
2218 return -EIO;
2219
2220 return ret;
2221 }
2222
alps_hw_init_v3(struct psmouse * psmouse)2223 static int alps_hw_init_v3(struct psmouse *psmouse)
2224 {
2225 struct alps_data *priv = psmouse->private;
2226 struct ps2dev *ps2dev = &psmouse->ps2dev;
2227 int reg_val;
2228 unsigned char param[4];
2229
2230 if ((priv->flags & ALPS_DUALPOINT) &&
2231 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2232 goto error;
2233
2234 if (alps_enter_command_mode(psmouse) ||
2235 alps_absolute_mode_v3(psmouse)) {
2236 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2237 goto error;
2238 }
2239
2240 reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2241 if (reg_val == -1)
2242 goto error;
2243 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2244 goto error;
2245
2246 reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2247 if (reg_val == -1)
2248 goto error;
2249 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2250 goto error;
2251
2252 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2253 goto error;
2254 if (__alps_command_mode_write_reg(psmouse, 0x04))
2255 goto error;
2256
2257 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2258 goto error;
2259 if (__alps_command_mode_write_reg(psmouse, 0x03))
2260 goto error;
2261
2262 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2263 goto error;
2264 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2265 goto error;
2266
2267 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2268 goto error;
2269 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2270 goto error;
2271
2272 alps_exit_command_mode(psmouse);
2273
2274 /* Set rate and enable data reporting */
2275 param[0] = 0x64;
2276 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2277 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2278 psmouse_err(psmouse, "Failed to enable data reporting\n");
2279 return -1;
2280 }
2281
2282 return 0;
2283
2284 error:
2285 /*
2286 * Leaving the touchpad in command mode will essentially render
2287 * it unusable until the machine reboots, so exit it here just
2288 * to be safe
2289 */
2290 alps_exit_command_mode(psmouse);
2291 return -1;
2292 }
2293
alps_get_v3_v7_resolution(struct psmouse * psmouse,int reg_pitch)2294 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2295 {
2296 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2297 struct alps_data *priv = psmouse->private;
2298
2299 reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2300 if (reg < 0)
2301 return reg;
2302
2303 x_pitch = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
2304 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2305
2306 y_pitch = (s8)reg >> 4; /* sign extend upper 4 bits */
2307 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2308
2309 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2310 if (reg < 0)
2311 return reg;
2312
2313 x_electrode = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
2314 x_electrode = 17 + x_electrode;
2315
2316 y_electrode = (s8)reg >> 4; /* sign extend upper 4 bits */
2317 y_electrode = 13 + y_electrode;
2318
2319 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2320 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2321
2322 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2323 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2324
2325 psmouse_dbg(psmouse,
2326 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2327 x_pitch, y_pitch, x_electrode, y_electrode,
2328 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2329
2330 return 0;
2331 }
2332
alps_hw_init_rushmore_v3(struct psmouse * psmouse)2333 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2334 {
2335 struct alps_data *priv = psmouse->private;
2336 struct ps2dev *ps2dev = &psmouse->ps2dev;
2337 int reg_val, ret = -1;
2338
2339 if (priv->flags & ALPS_DUALPOINT) {
2340 reg_val = alps_setup_trackstick_v3(psmouse,
2341 ALPS_REG_BASE_RUSHMORE);
2342 if (reg_val == -EIO)
2343 goto error;
2344 }
2345
2346 if (alps_enter_command_mode(psmouse) ||
2347 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2348 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2349 goto error;
2350
2351 if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2352 goto error;
2353
2354 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2355 if (reg_val == -1)
2356 goto error;
2357 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2358 goto error;
2359
2360 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2361 goto error;
2362
2363 /* enter absolute mode */
2364 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2365 if (reg_val == -1)
2366 goto error;
2367 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2368 goto error;
2369
2370 alps_exit_command_mode(psmouse);
2371 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2372
2373 error:
2374 alps_exit_command_mode(psmouse);
2375 return ret;
2376 }
2377
2378 /* Must be in command mode when calling this function */
alps_absolute_mode_v4(struct psmouse * psmouse)2379 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2380 {
2381 int reg_val;
2382
2383 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2384 if (reg_val == -1)
2385 return -1;
2386
2387 reg_val |= 0x02;
2388 if (__alps_command_mode_write_reg(psmouse, reg_val))
2389 return -1;
2390
2391 return 0;
2392 }
2393
alps_hw_init_v4(struct psmouse * psmouse)2394 static int alps_hw_init_v4(struct psmouse *psmouse)
2395 {
2396 struct ps2dev *ps2dev = &psmouse->ps2dev;
2397 unsigned char param[4];
2398
2399 if (alps_enter_command_mode(psmouse))
2400 goto error;
2401
2402 if (alps_absolute_mode_v4(psmouse)) {
2403 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2404 goto error;
2405 }
2406
2407 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2408 goto error;
2409
2410 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2411 goto error;
2412
2413 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2414 goto error;
2415
2416 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2417 goto error;
2418
2419 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2420 goto error;
2421
2422 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2423 goto error;
2424
2425 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2426 goto error;
2427
2428 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2429 goto error;
2430
2431 alps_exit_command_mode(psmouse);
2432
2433 /*
2434 * This sequence changes the output from a 9-byte to an
2435 * 8-byte format. All the same data seems to be present,
2436 * just in a more compact format.
2437 */
2438 param[0] = 0xc8;
2439 param[1] = 0x64;
2440 param[2] = 0x50;
2441 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2442 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) ||
2443 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) ||
2444 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2445 return -1;
2446
2447 /* Set rate and enable data reporting */
2448 param[0] = 0x64;
2449 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2450 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2451 psmouse_err(psmouse, "Failed to enable data reporting\n");
2452 return -1;
2453 }
2454
2455 return 0;
2456
2457 error:
2458 /*
2459 * Leaving the touchpad in command mode will essentially render
2460 * it unusable until the machine reboots, so exit it here just
2461 * to be safe
2462 */
2463 alps_exit_command_mode(psmouse);
2464 return -1;
2465 }
2466
alps_get_otp_values_ss4_v2(struct psmouse * psmouse,unsigned char index,unsigned char otp[])2467 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2468 unsigned char index, unsigned char otp[])
2469 {
2470 struct ps2dev *ps2dev = &psmouse->ps2dev;
2471
2472 switch (index) {
2473 case 0:
2474 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2475 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2476 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2477 return -1;
2478
2479 break;
2480
2481 case 1:
2482 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2483 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2484 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2485 return -1;
2486
2487 break;
2488 }
2489
2490 return 0;
2491 }
2492
alps_update_device_area_ss4_v2(unsigned char otp[][4],struct alps_data * priv)2493 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2494 struct alps_data *priv)
2495 {
2496 int num_x_electrode;
2497 int num_y_electrode;
2498 int x_pitch, y_pitch, x_phys, y_phys;
2499
2500 if (IS_SS4PLUS_DEV(priv->dev_id)) {
2501 num_x_electrode =
2502 SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
2503 num_y_electrode =
2504 SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
2505
2506 priv->x_max =
2507 (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2508 priv->y_max =
2509 (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2510
2511 x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2512 y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2513
2514 } else {
2515 num_x_electrode =
2516 SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2517 num_y_electrode =
2518 SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2519
2520 priv->x_max =
2521 (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2522 priv->y_max =
2523 (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2524
2525 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2526 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2527 }
2528
2529 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2530 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2531
2532 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2533 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2534
2535 return 0;
2536 }
2537
alps_update_btn_info_ss4_v2(unsigned char otp[][4],struct alps_data * priv)2538 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2539 struct alps_data *priv)
2540 {
2541 unsigned char is_btnless;
2542
2543 if (IS_SS4PLUS_DEV(priv->dev_id))
2544 is_btnless = (otp[1][0] >> 1) & 0x01;
2545 else
2546 is_btnless = (otp[1][1] >> 3) & 0x01;
2547
2548 if (is_btnless)
2549 priv->flags |= ALPS_BUTTONPAD;
2550
2551 return 0;
2552 }
2553
alps_update_dual_info_ss4_v2(unsigned char otp[][4],struct alps_data * priv,struct psmouse * psmouse)2554 static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
2555 struct alps_data *priv,
2556 struct psmouse *psmouse)
2557 {
2558 bool is_dual = false;
2559 int reg_val = 0;
2560 struct ps2dev *ps2dev = &psmouse->ps2dev;
2561
2562 if (IS_SS4PLUS_DEV(priv->dev_id)) {
2563 is_dual = (otp[0][0] >> 4) & 0x01;
2564
2565 if (!is_dual) {
2566 /* For support TrackStick of Thinkpad L/E series */
2567 if (alps_exit_command_mode(psmouse) == 0 &&
2568 alps_enter_command_mode(psmouse) == 0) {
2569 reg_val = alps_command_mode_read_reg(psmouse,
2570 0xD7);
2571 }
2572 alps_exit_command_mode(psmouse);
2573 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2574
2575 if (reg_val == 0x0C || reg_val == 0x1D)
2576 is_dual = true;
2577 }
2578 }
2579
2580 if (is_dual)
2581 priv->flags |= ALPS_DUALPOINT |
2582 ALPS_DUALPOINT_WITH_PRESSURE;
2583
2584 return 0;
2585 }
2586
alps_set_defaults_ss4_v2(struct psmouse * psmouse,struct alps_data * priv)2587 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2588 struct alps_data *priv)
2589 {
2590 unsigned char otp[2][4];
2591
2592 memset(otp, 0, sizeof(otp));
2593
2594 if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) ||
2595 alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]))
2596 return -1;
2597
2598 alps_update_device_area_ss4_v2(otp, priv);
2599
2600 alps_update_btn_info_ss4_v2(otp, priv);
2601
2602 alps_update_dual_info_ss4_v2(otp, priv, psmouse);
2603
2604 return 0;
2605 }
2606
alps_dolphin_get_device_area(struct psmouse * psmouse,struct alps_data * priv)2607 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2608 struct alps_data *priv)
2609 {
2610 struct ps2dev *ps2dev = &psmouse->ps2dev;
2611 unsigned char param[4] = {0};
2612 int num_x_electrode, num_y_electrode;
2613
2614 if (alps_enter_command_mode(psmouse))
2615 return -1;
2616
2617 param[0] = 0x0a;
2618 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2619 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2620 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2621 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2622 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE))
2623 return -1;
2624
2625 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2626 return -1;
2627
2628 /*
2629 * Dolphin's sensor line number is not fixed. It can be calculated
2630 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2631 * Further more, we can get device's x_max and y_max by multiplying
2632 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2633 *
2634 * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2635 * real sensor line number X = 11 + 8 = 19, and
2636 * real sensor line number Y = 8 + 1 = 9.
2637 * So, x_max = (19 - 1) * 64 = 1152, and
2638 * y_max = (9 - 1) * 64 = 512.
2639 */
2640 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2641 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2642 priv->x_bits = num_x_electrode;
2643 priv->y_bits = num_y_electrode;
2644 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2645 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2646
2647 if (alps_exit_command_mode(psmouse))
2648 return -1;
2649
2650 return 0;
2651 }
2652
alps_hw_init_dolphin_v1(struct psmouse * psmouse)2653 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2654 {
2655 struct ps2dev *ps2dev = &psmouse->ps2dev;
2656 unsigned char param[2];
2657
2658 /* This is dolphin "v1" as empirically defined by florin9doi */
2659 param[0] = 0x64;
2660 param[1] = 0x28;
2661
2662 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2663 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2664 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2665 return -1;
2666
2667 return 0;
2668 }
2669
alps_hw_init_v7(struct psmouse * psmouse)2670 static int alps_hw_init_v7(struct psmouse *psmouse)
2671 {
2672 struct ps2dev *ps2dev = &psmouse->ps2dev;
2673 int reg_val, ret = -1;
2674
2675 if (alps_enter_command_mode(psmouse) ||
2676 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2677 goto error;
2678
2679 if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2680 goto error;
2681
2682 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2683 goto error;
2684
2685 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2686 if (reg_val == -1)
2687 goto error;
2688 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2689 goto error;
2690
2691 alps_exit_command_mode(psmouse);
2692 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2693
2694 error:
2695 alps_exit_command_mode(psmouse);
2696 return ret;
2697 }
2698
alps_hw_init_ss4_v2(struct psmouse * psmouse)2699 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2700 {
2701 struct ps2dev *ps2dev = &psmouse->ps2dev;
2702 char param[2] = {0x64, 0x28};
2703 int ret = -1;
2704
2705 /* enter absolute mode */
2706 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2707 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2708 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2709 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) {
2710 goto error;
2711 }
2712
2713 /* T.B.D. Decread noise packet number, delete in the future */
2714 if (alps_exit_command_mode(psmouse) ||
2715 alps_enter_command_mode(psmouse) ||
2716 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2717 goto error;
2718 }
2719 alps_exit_command_mode(psmouse);
2720
2721 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2722
2723 error:
2724 alps_exit_command_mode(psmouse);
2725 return ret;
2726 }
2727
alps_set_protocol(struct psmouse * psmouse,struct alps_data * priv,const struct alps_protocol_info * protocol)2728 static int alps_set_protocol(struct psmouse *psmouse,
2729 struct alps_data *priv,
2730 const struct alps_protocol_info *protocol)
2731 {
2732 psmouse->private = priv;
2733
2734 timer_setup(&priv->timer, alps_flush_packet, 0);
2735
2736 priv->proto_version = protocol->version;
2737 priv->byte0 = protocol->byte0;
2738 priv->mask0 = protocol->mask0;
2739 priv->flags = protocol->flags;
2740
2741 priv->x_max = 2000;
2742 priv->y_max = 1400;
2743 priv->x_bits = 15;
2744 priv->y_bits = 11;
2745
2746 switch (priv->proto_version) {
2747 case ALPS_PROTO_V1:
2748 case ALPS_PROTO_V2:
2749 priv->hw_init = alps_hw_init_v1_v2;
2750 priv->process_packet = alps_process_packet_v1_v2;
2751 priv->set_abs_params = alps_set_abs_params_st;
2752 priv->x_max = 1023;
2753 priv->y_max = 767;
2754 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2755 priv->flags |= ALPS_STICK_BITS;
2756 break;
2757
2758 case ALPS_PROTO_V3:
2759 priv->hw_init = alps_hw_init_v3;
2760 priv->process_packet = alps_process_packet_v3;
2761 priv->set_abs_params = alps_set_abs_params_semi_mt;
2762 priv->decode_fields = alps_decode_pinnacle;
2763 priv->nibble_commands = alps_v3_nibble_commands;
2764 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2765
2766 if (alps_probe_trackstick_v3_v7(psmouse,
2767 ALPS_REG_BASE_PINNACLE) < 0)
2768 priv->flags &= ~ALPS_DUALPOINT;
2769
2770 break;
2771
2772 case ALPS_PROTO_V3_RUSHMORE:
2773 priv->hw_init = alps_hw_init_rushmore_v3;
2774 priv->process_packet = alps_process_packet_v3;
2775 priv->set_abs_params = alps_set_abs_params_semi_mt;
2776 priv->decode_fields = alps_decode_rushmore;
2777 priv->nibble_commands = alps_v3_nibble_commands;
2778 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2779 priv->x_bits = 16;
2780 priv->y_bits = 12;
2781
2782 if (alps_probe_trackstick_v3_v7(psmouse,
2783 ALPS_REG_BASE_RUSHMORE) < 0)
2784 priv->flags &= ~ALPS_DUALPOINT;
2785
2786 break;
2787
2788 case ALPS_PROTO_V4:
2789 priv->hw_init = alps_hw_init_v4;
2790 priv->process_packet = alps_process_packet_v4;
2791 priv->set_abs_params = alps_set_abs_params_semi_mt;
2792 priv->nibble_commands = alps_v4_nibble_commands;
2793 priv->addr_command = PSMOUSE_CMD_DISABLE;
2794 break;
2795
2796 case ALPS_PROTO_V5:
2797 priv->hw_init = alps_hw_init_dolphin_v1;
2798 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2799 priv->decode_fields = alps_decode_dolphin;
2800 priv->set_abs_params = alps_set_abs_params_semi_mt;
2801 priv->nibble_commands = alps_v3_nibble_commands;
2802 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2803 priv->x_bits = 23;
2804 priv->y_bits = 12;
2805
2806 if (alps_dolphin_get_device_area(psmouse, priv))
2807 return -EIO;
2808
2809 break;
2810
2811 case ALPS_PROTO_V6:
2812 priv->hw_init = alps_hw_init_v6;
2813 priv->process_packet = alps_process_packet_v6;
2814 priv->set_abs_params = alps_set_abs_params_st;
2815 priv->nibble_commands = alps_v6_nibble_commands;
2816 priv->x_max = 2047;
2817 priv->y_max = 1535;
2818 break;
2819
2820 case ALPS_PROTO_V7:
2821 priv->hw_init = alps_hw_init_v7;
2822 priv->process_packet = alps_process_packet_v7;
2823 priv->decode_fields = alps_decode_packet_v7;
2824 priv->set_abs_params = alps_set_abs_params_v7;
2825 priv->nibble_commands = alps_v3_nibble_commands;
2826 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2827 priv->x_max = 0xfff;
2828 priv->y_max = 0x7ff;
2829
2830 if (priv->fw_ver[1] != 0xba)
2831 priv->flags |= ALPS_BUTTONPAD;
2832
2833 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2834 priv->flags &= ~ALPS_DUALPOINT;
2835
2836 break;
2837
2838 case ALPS_PROTO_V8:
2839 priv->hw_init = alps_hw_init_ss4_v2;
2840 priv->process_packet = alps_process_packet_ss4_v2;
2841 priv->decode_fields = alps_decode_ss4_v2;
2842 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2843 priv->nibble_commands = alps_v3_nibble_commands;
2844 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2845
2846 if (alps_set_defaults_ss4_v2(psmouse, priv))
2847 return -EIO;
2848
2849 break;
2850 }
2851
2852 return 0;
2853 }
2854
alps_match_table(unsigned char * e7,unsigned char * ec)2855 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2856 unsigned char *ec)
2857 {
2858 const struct alps_model_info *model;
2859 int i;
2860
2861 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2862 model = &alps_model_data[i];
2863
2864 if (!memcmp(e7, model->signature, sizeof(model->signature)))
2865 return &model->protocol_info;
2866 }
2867
2868 return NULL;
2869 }
2870
alps_is_cs19_trackpoint(struct psmouse * psmouse)2871 static bool alps_is_cs19_trackpoint(struct psmouse *psmouse)
2872 {
2873 u8 param[2] = { 0 };
2874
2875 if (ps2_command(&psmouse->ps2dev,
2876 param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
2877 return false;
2878
2879 /*
2880 * param[0] contains the trackpoint device variant_id while
2881 * param[1] contains the firmware_id. So far all alps
2882 * trackpoint-only devices have their variant_ids equal
2883 * TP_VARIANT_ALPS and their firmware_ids are in 0x20~0x2f range.
2884 */
2885 return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20);
2886 }
2887
alps_identify(struct psmouse * psmouse,struct alps_data * priv)2888 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2889 {
2890 const struct alps_protocol_info *protocol;
2891 unsigned char e6[4], e7[4], ec[4];
2892 int error;
2893
2894 /*
2895 * First try "E6 report".
2896 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2897 * The bits 0-2 of the first byte will be 1s if some buttons are
2898 * pressed.
2899 */
2900 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2901 PSMOUSE_CMD_SETSCALE11, e6))
2902 return -EIO;
2903
2904 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2905 return -EINVAL;
2906
2907 /*
2908 * Now get the "E7" and "EC" reports. These will uniquely identify
2909 * most ALPS touchpads.
2910 */
2911 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2912 PSMOUSE_CMD_SETSCALE21, e7) ||
2913 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2914 PSMOUSE_CMD_RESET_WRAP, ec) ||
2915 alps_exit_command_mode(psmouse))
2916 return -EIO;
2917
2918 protocol = alps_match_table(e7, ec);
2919 if (!protocol) {
2920 if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
2921 ec[2] == 0x8a) {
2922 protocol = &alps_v4_protocol_data;
2923 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2924 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2925 protocol = &alps_v5_protocol_data;
2926 } else if (ec[0] == 0x88 &&
2927 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2928 protocol = &alps_v7_protocol_data;
2929 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2930 protocol = &alps_v3_rushmore_data;
2931 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2932 ec[2] >= 0x90 && ec[2] <= 0x9d) {
2933 protocol = &alps_v3_protocol_data;
2934 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2935 (e7[2] == 0x14 || e7[2] == 0x28)) {
2936 protocol = &alps_v8_protocol_data;
2937 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
2938 protocol = &alps_v9_protocol_data;
2939 psmouse_warn(psmouse,
2940 "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
2941 e7, ec);
2942 return -EINVAL;
2943 } else {
2944 psmouse_dbg(psmouse,
2945 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2946 return -EINVAL;
2947 }
2948 }
2949
2950 if (priv) {
2951 /* Save Device ID and Firmware version */
2952 memcpy(priv->dev_id, e7, 3);
2953 memcpy(priv->fw_ver, ec, 3);
2954 error = alps_set_protocol(psmouse, priv, protocol);
2955 if (error)
2956 return error;
2957 }
2958
2959 return 0;
2960 }
2961
alps_reconnect(struct psmouse * psmouse)2962 static int alps_reconnect(struct psmouse *psmouse)
2963 {
2964 struct alps_data *priv = psmouse->private;
2965
2966 psmouse_reset(psmouse);
2967
2968 if (alps_identify(psmouse, priv) < 0)
2969 return -1;
2970
2971 return priv->hw_init(psmouse);
2972 }
2973
alps_disconnect(struct psmouse * psmouse)2974 static void alps_disconnect(struct psmouse *psmouse)
2975 {
2976 struct alps_data *priv = psmouse->private;
2977
2978 psmouse_reset(psmouse);
2979 timer_shutdown_sync(&priv->timer);
2980 if (priv->dev2)
2981 input_unregister_device(priv->dev2);
2982 if (!IS_ERR_OR_NULL(priv->dev3))
2983 input_unregister_device(priv->dev3);
2984 kfree(priv);
2985 }
2986
alps_set_abs_params_st(struct alps_data * priv,struct input_dev * dev1)2987 static void alps_set_abs_params_st(struct alps_data *priv,
2988 struct input_dev *dev1)
2989 {
2990 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2991 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2992 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2993 }
2994
alps_set_abs_params_mt_common(struct alps_data * priv,struct input_dev * dev1)2995 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2996 struct input_dev *dev1)
2997 {
2998 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2999 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
3000
3001 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
3002 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
3003
3004 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
3005 set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
3006 }
3007
alps_set_abs_params_semi_mt(struct alps_data * priv,struct input_dev * dev1)3008 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
3009 struct input_dev *dev1)
3010 {
3011 alps_set_abs_params_mt_common(priv, dev1);
3012 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3013
3014 input_mt_init_slots(dev1, MAX_TOUCHES,
3015 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3016 INPUT_MT_SEMI_MT);
3017 }
3018
alps_set_abs_params_v7(struct alps_data * priv,struct input_dev * dev1)3019 static void alps_set_abs_params_v7(struct alps_data *priv,
3020 struct input_dev *dev1)
3021 {
3022 alps_set_abs_params_mt_common(priv, dev1);
3023 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3024
3025 input_mt_init_slots(dev1, MAX_TOUCHES,
3026 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3027 INPUT_MT_TRACK);
3028
3029 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3030 }
3031
alps_set_abs_params_ss4_v2(struct alps_data * priv,struct input_dev * dev1)3032 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
3033 struct input_dev *dev1)
3034 {
3035 alps_set_abs_params_mt_common(priv, dev1);
3036 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3037 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3038
3039 input_mt_init_slots(dev1, MAX_TOUCHES,
3040 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3041 INPUT_MT_TRACK);
3042 }
3043
alps_init(struct psmouse * psmouse)3044 int alps_init(struct psmouse *psmouse)
3045 {
3046 struct alps_data *priv = psmouse->private;
3047 struct input_dev *dev1 = psmouse->dev;
3048 int error;
3049
3050 error = priv->hw_init(psmouse);
3051 if (error)
3052 goto init_fail;
3053
3054 /*
3055 * Undo part of setup done for us by psmouse core since touchpad
3056 * is not a relative device.
3057 */
3058 __clear_bit(EV_REL, dev1->evbit);
3059 __clear_bit(REL_X, dev1->relbit);
3060 __clear_bit(REL_Y, dev1->relbit);
3061
3062 /*
3063 * Now set up our capabilities.
3064 */
3065 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
3066 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
3067 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
3068 dev1->keybit[BIT_WORD(BTN_LEFT)] |=
3069 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
3070
3071 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
3072
3073 priv->set_abs_params(priv, dev1);
3074
3075 if (priv->flags & ALPS_WHEEL) {
3076 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
3077 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
3078 }
3079
3080 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
3081 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
3082 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
3083 }
3084
3085 if (priv->flags & ALPS_FOUR_BUTTONS) {
3086 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
3087 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
3088 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
3089 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
3090 } else if (priv->flags & ALPS_BUTTONPAD) {
3091 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
3092 clear_bit(BTN_RIGHT, dev1->keybit);
3093 } else {
3094 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
3095 }
3096
3097 if (priv->flags & ALPS_DUALPOINT) {
3098 struct input_dev *dev2;
3099
3100 dev2 = input_allocate_device();
3101 if (!dev2) {
3102 psmouse_err(psmouse,
3103 "failed to allocate trackstick device\n");
3104 error = -ENOMEM;
3105 goto init_fail;
3106 }
3107
3108 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3109 psmouse->ps2dev.serio->phys);
3110 dev2->phys = priv->phys2;
3111
3112 /*
3113 * format of input device name is: "protocol vendor name"
3114 * see function psmouse_switch_protocol() in psmouse-base.c
3115 */
3116 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3117
3118 dev2->id.bustype = BUS_I8042;
3119 dev2->id.vendor = 0x0002;
3120 dev2->id.product = PSMOUSE_ALPS;
3121 dev2->id.version = priv->proto_version;
3122 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3123
3124 input_set_capability(dev2, EV_REL, REL_X);
3125 input_set_capability(dev2, EV_REL, REL_Y);
3126 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3127 input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3128 input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3129 }
3130 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3131 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3132 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3133
3134 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3135 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3136
3137 error = input_register_device(dev2);
3138 if (error) {
3139 psmouse_err(psmouse,
3140 "failed to register trackstick device: %d\n",
3141 error);
3142 input_free_device(dev2);
3143 goto init_fail;
3144 }
3145
3146 priv->dev2 = dev2;
3147 }
3148
3149 priv->psmouse = psmouse;
3150
3151 INIT_DELAYED_WORK(&priv->dev3_register_work,
3152 alps_register_bare_ps2_mouse);
3153
3154 psmouse->protocol_handler = alps_process_byte;
3155 psmouse->poll = alps_poll;
3156 psmouse->disconnect = alps_disconnect;
3157 psmouse->reconnect = alps_reconnect;
3158 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3159
3160 /* We are having trouble resyncing ALPS touchpads so disable it for now */
3161 psmouse->resync_time = 0;
3162
3163 /* Allow 2 invalid packets without resetting device */
3164 psmouse->resetafter = psmouse->pktsize * 2;
3165
3166 return 0;
3167
3168 init_fail:
3169 psmouse_reset(psmouse);
3170 /*
3171 * Even though we did not allocate psmouse->private we do free
3172 * it here.
3173 */
3174 kfree(psmouse->private);
3175 psmouse->private = NULL;
3176 return error;
3177 }
3178
alps_detect(struct psmouse * psmouse,bool set_properties)3179 int alps_detect(struct psmouse *psmouse, bool set_properties)
3180 {
3181 struct alps_data *priv;
3182 int error;
3183
3184 error = alps_identify(psmouse, NULL);
3185 if (error)
3186 return error;
3187
3188 /*
3189 * ALPS cs19 is a trackpoint-only device, and uses different
3190 * protocol than DualPoint ones, so we return -EINVAL here and let
3191 * trackpoint.c drive this device. If the trackpoint driver is not
3192 * enabled, the device will fall back to a bare PS/2 mouse.
3193 * If ps2_command() fails here, we depend on the immediately
3194 * followed psmouse_reset() to reset the device to normal state.
3195 */
3196 if (alps_is_cs19_trackpoint(psmouse)) {
3197 psmouse_dbg(psmouse,
3198 "ALPS CS19 trackpoint-only device detected, ignoring\n");
3199 return -EINVAL;
3200 }
3201
3202 /*
3203 * Reset the device to make sure it is fully operational:
3204 * on some laptops, like certain Dell Latitudes, we may
3205 * fail to properly detect presence of trackstick if device
3206 * has not been reset.
3207 */
3208 psmouse_reset(psmouse);
3209
3210 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
3211 if (!priv)
3212 return -ENOMEM;
3213
3214 error = alps_identify(psmouse, priv);
3215 if (error) {
3216 kfree(priv);
3217 return error;
3218 }
3219
3220 if (set_properties) {
3221 psmouse->vendor = "ALPS";
3222 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3223 "DualPoint TouchPad" : "GlidePoint";
3224 psmouse->model = priv->proto_version;
3225 } else {
3226 /*
3227 * Destroy alps_data structure we allocated earlier since
3228 * this was just a "trial run". Otherwise we'll keep it
3229 * to be used by alps_init() which has to be called if
3230 * we succeed and set_properties is true.
3231 */
3232 kfree(priv);
3233 psmouse->private = NULL;
3234 }
3235
3236 return 0;
3237 }
3238
3239