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_register_bare_ps2_mouse(struct work_struct * work)1399 static void alps_register_bare_ps2_mouse(struct work_struct *work)
1400 {
1401 struct alps_data *priv =
1402 container_of(work, struct alps_data, dev3_register_work.work);
1403 struct psmouse *psmouse = priv->psmouse;
1404 struct input_dev *dev3;
1405 int error = 0;
1406
1407 mutex_lock(&alps_mutex);
1408
1409 if (priv->dev3)
1410 goto out;
1411
1412 dev3 = input_allocate_device();
1413 if (!dev3) {
1414 psmouse_err(psmouse, "failed to allocate secondary device\n");
1415 error = -ENOMEM;
1416 goto out;
1417 }
1418
1419 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1420 psmouse->ps2dev.serio->phys,
1421 (priv->dev2 ? "input2" : "input1"));
1422 dev3->phys = priv->phys3;
1423
1424 /*
1425 * format of input device name is: "protocol vendor name"
1426 * see function psmouse_switch_protocol() in psmouse-base.c
1427 */
1428 dev3->name = "PS/2 ALPS Mouse";
1429
1430 dev3->id.bustype = BUS_I8042;
1431 dev3->id.vendor = 0x0002;
1432 dev3->id.product = PSMOUSE_PS2;
1433 dev3->id.version = 0x0000;
1434 dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1435
1436 input_set_capability(dev3, EV_REL, REL_X);
1437 input_set_capability(dev3, EV_REL, REL_Y);
1438 input_set_capability(dev3, EV_KEY, BTN_LEFT);
1439 input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1440 input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1441
1442 __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1443
1444 error = input_register_device(dev3);
1445 if (error) {
1446 psmouse_err(psmouse,
1447 "failed to register secondary device: %d\n",
1448 error);
1449 input_free_device(dev3);
1450 goto out;
1451 }
1452
1453 priv->dev3 = dev3;
1454
1455 out:
1456 /*
1457 * Save the error code so that we can detect that we
1458 * already tried to create the device.
1459 */
1460 if (error)
1461 priv->dev3 = ERR_PTR(error);
1462
1463 mutex_unlock(&alps_mutex);
1464 }
1465
alps_report_bare_ps2_packet(struct psmouse * psmouse,unsigned char packet[],bool report_buttons)1466 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1467 unsigned char packet[],
1468 bool report_buttons)
1469 {
1470 struct alps_data *priv = psmouse->private;
1471 struct input_dev *dev, *dev2 = NULL;
1472
1473 /* Figure out which device to use to report the bare packet */
1474 if (priv->proto_version == ALPS_PROTO_V2 &&
1475 (priv->flags & ALPS_DUALPOINT)) {
1476 /* On V2 devices the DualPoint Stick reports bare packets */
1477 dev = priv->dev2;
1478 dev2 = psmouse->dev;
1479 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1480 /* Register dev3 mouse if we received PS/2 packet first time */
1481 if (!IS_ERR(priv->dev3))
1482 psmouse_queue_work(psmouse, &priv->dev3_register_work,
1483 0);
1484 return;
1485 } else {
1486 dev = priv->dev3;
1487 }
1488
1489 if (report_buttons)
1490 alps_report_buttons(dev, dev2,
1491 packet[0] & 1, packet[0] & 2, packet[0] & 4);
1492
1493 psmouse_report_standard_motion(dev, packet);
1494
1495 input_sync(dev);
1496 }
1497
alps_handle_interleaved_ps2(struct psmouse * psmouse)1498 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1499 {
1500 struct alps_data *priv = psmouse->private;
1501
1502 if (psmouse->pktcnt < 6)
1503 return PSMOUSE_GOOD_DATA;
1504
1505 if (psmouse->pktcnt == 6) {
1506 /*
1507 * Start a timer to flush the packet if it ends up last
1508 * 6-byte packet in the stream. Timer needs to fire
1509 * psmouse core times out itself. 20 ms should be enough
1510 * to decide if we are getting more data or not.
1511 */
1512 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1513 return PSMOUSE_GOOD_DATA;
1514 }
1515
1516 del_timer(&priv->timer);
1517
1518 if (psmouse->packet[6] & 0x80) {
1519
1520 /*
1521 * Highest bit is set - that means we either had
1522 * complete ALPS packet and this is start of the
1523 * next packet or we got garbage.
1524 */
1525
1526 if (((psmouse->packet[3] |
1527 psmouse->packet[4] |
1528 psmouse->packet[5]) & 0x80) ||
1529 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) {
1530 psmouse_dbg(psmouse,
1531 "refusing packet %4ph (suspected interleaved ps/2)\n",
1532 psmouse->packet + 3);
1533 return PSMOUSE_BAD_DATA;
1534 }
1535
1536 priv->process_packet(psmouse);
1537
1538 /* Continue with the next packet */
1539 psmouse->packet[0] = psmouse->packet[6];
1540 psmouse->pktcnt = 1;
1541
1542 } else {
1543
1544 /*
1545 * High bit is 0 - that means that we indeed got a PS/2
1546 * packet in the middle of ALPS packet.
1547 *
1548 * There is also possibility that we got 6-byte ALPS
1549 * packet followed by 3-byte packet from trackpoint. We
1550 * can not distinguish between these 2 scenarios but
1551 * because the latter is unlikely to happen in course of
1552 * normal operation (user would need to press all
1553 * buttons on the pad and start moving trackpoint
1554 * without touching the pad surface) we assume former.
1555 * Even if we are wrong the wost thing that would happen
1556 * the cursor would jump but we should not get protocol
1557 * de-synchronization.
1558 */
1559
1560 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
1561 false);
1562
1563 /*
1564 * Continue with the standard ALPS protocol handling,
1565 * but make sure we won't process it as an interleaved
1566 * packet again, which may happen if all buttons are
1567 * pressed. To avoid this let's reset the 4th bit which
1568 * is normally 1.
1569 */
1570 psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1571 psmouse->pktcnt = 4;
1572 }
1573
1574 return PSMOUSE_GOOD_DATA;
1575 }
1576
alps_flush_packet(struct timer_list * t)1577 static void alps_flush_packet(struct timer_list *t)
1578 {
1579 struct alps_data *priv = from_timer(priv, t, timer);
1580 struct psmouse *psmouse = priv->psmouse;
1581
1582 serio_pause_rx(psmouse->ps2dev.serio);
1583
1584 if (psmouse->pktcnt == psmouse->pktsize) {
1585
1586 /*
1587 * We did not any more data in reasonable amount of time.
1588 * Validate the last 3 bytes and process as a standard
1589 * ALPS packet.
1590 */
1591 if ((psmouse->packet[3] |
1592 psmouse->packet[4] |
1593 psmouse->packet[5]) & 0x80) {
1594 psmouse_dbg(psmouse,
1595 "refusing packet %3ph (suspected interleaved ps/2)\n",
1596 psmouse->packet + 3);
1597 } else {
1598 priv->process_packet(psmouse);
1599 }
1600 psmouse->pktcnt = 0;
1601 }
1602
1603 serio_continue_rx(psmouse->ps2dev.serio);
1604 }
1605
alps_process_byte(struct psmouse * psmouse)1606 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1607 {
1608 struct alps_data *priv = psmouse->private;
1609
1610 /*
1611 * Check if we are dealing with a bare PS/2 packet, presumably from
1612 * a device connected to the external PS/2 port. Because bare PS/2
1613 * protocol does not have enough constant bits to self-synchronize
1614 * properly we only do this if the device is fully synchronized.
1615 * Can not distinguish V8's first byte from PS/2 packet's
1616 */
1617 if (priv->proto_version != ALPS_PROTO_V8 &&
1618 !psmouse->out_of_sync_cnt &&
1619 (psmouse->packet[0] & 0xc8) == 0x08) {
1620
1621 if (psmouse->pktcnt == 3) {
1622 alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1623 true);
1624 return PSMOUSE_FULL_PACKET;
1625 }
1626 return PSMOUSE_GOOD_DATA;
1627 }
1628
1629 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
1630
1631 if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1632 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1633 return alps_handle_interleaved_ps2(psmouse);
1634 }
1635
1636 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) {
1637 psmouse_dbg(psmouse,
1638 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
1639 psmouse->packet[0], priv->mask0, priv->byte0);
1640 return PSMOUSE_BAD_DATA;
1641 }
1642
1643 /* Bytes 2 - pktsize should have 0 in the highest bit */
1644 if (priv->proto_version < ALPS_PROTO_V5 &&
1645 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1646 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
1647 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1648 psmouse->pktcnt - 1,
1649 psmouse->packet[psmouse->pktcnt - 1]);
1650
1651 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE &&
1652 psmouse->pktcnt == psmouse->pktsize) {
1653 /*
1654 * Some Dell boxes, such as Latitude E6440 or E7440
1655 * with closed lid, quite often smash last byte of
1656 * otherwise valid packet with 0xff. Given that the
1657 * next packet is very likely to be valid let's
1658 * report PSMOUSE_FULL_PACKET but not process data,
1659 * rather than reporting PSMOUSE_BAD_DATA and
1660 * filling the logs.
1661 */
1662 return PSMOUSE_FULL_PACKET;
1663 }
1664
1665 return PSMOUSE_BAD_DATA;
1666 }
1667
1668 if ((priv->proto_version == ALPS_PROTO_V7 &&
1669 !alps_is_valid_package_v7(psmouse)) ||
1670 (priv->proto_version == ALPS_PROTO_V8 &&
1671 !alps_is_valid_package_ss4_v2(psmouse))) {
1672 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
1673 psmouse->pktcnt - 1,
1674 psmouse->packet[psmouse->pktcnt - 1]);
1675 return PSMOUSE_BAD_DATA;
1676 }
1677
1678 if (psmouse->pktcnt == psmouse->pktsize) {
1679 priv->process_packet(psmouse);
1680 return PSMOUSE_FULL_PACKET;
1681 }
1682
1683 return PSMOUSE_GOOD_DATA;
1684 }
1685
alps_command_mode_send_nibble(struct psmouse * psmouse,int nibble)1686 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1687 {
1688 struct ps2dev *ps2dev = &psmouse->ps2dev;
1689 struct alps_data *priv = psmouse->private;
1690 int command;
1691 unsigned char *param;
1692 unsigned char dummy[4];
1693
1694 BUG_ON(nibble > 0xf);
1695
1696 command = priv->nibble_commands[nibble].command;
1697 param = (command & 0x0f00) ?
1698 dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1699
1700 if (ps2_command(ps2dev, param, command))
1701 return -1;
1702
1703 return 0;
1704 }
1705
alps_command_mode_set_addr(struct psmouse * psmouse,int addr)1706 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1707 {
1708 struct ps2dev *ps2dev = &psmouse->ps2dev;
1709 struct alps_data *priv = psmouse->private;
1710 int i, nibble;
1711
1712 if (ps2_command(ps2dev, NULL, priv->addr_command))
1713 return -1;
1714
1715 for (i = 12; i >= 0; i -= 4) {
1716 nibble = (addr >> i) & 0xf;
1717 if (alps_command_mode_send_nibble(psmouse, nibble))
1718 return -1;
1719 }
1720
1721 return 0;
1722 }
1723
__alps_command_mode_read_reg(struct psmouse * psmouse,int addr)1724 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1725 {
1726 struct ps2dev *ps2dev = &psmouse->ps2dev;
1727 unsigned char param[4];
1728
1729 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1730 return -1;
1731
1732 /*
1733 * The address being read is returned in the first two bytes
1734 * of the result. Check that this address matches the expected
1735 * address.
1736 */
1737 if (addr != ((param[0] << 8) | param[1]))
1738 return -1;
1739
1740 return param[2];
1741 }
1742
alps_command_mode_read_reg(struct psmouse * psmouse,int addr)1743 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1744 {
1745 if (alps_command_mode_set_addr(psmouse, addr))
1746 return -1;
1747 return __alps_command_mode_read_reg(psmouse, addr);
1748 }
1749
__alps_command_mode_write_reg(struct psmouse * psmouse,u8 value)1750 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1751 {
1752 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1753 return -1;
1754 if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1755 return -1;
1756 return 0;
1757 }
1758
alps_command_mode_write_reg(struct psmouse * psmouse,int addr,u8 value)1759 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1760 u8 value)
1761 {
1762 if (alps_command_mode_set_addr(psmouse, addr))
1763 return -1;
1764 return __alps_command_mode_write_reg(psmouse, value);
1765 }
1766
alps_rpt_cmd(struct psmouse * psmouse,int init_command,int repeated_command,unsigned char * param)1767 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1768 int repeated_command, unsigned char *param)
1769 {
1770 struct ps2dev *ps2dev = &psmouse->ps2dev;
1771
1772 param[0] = 0;
1773 if (init_command && ps2_command(ps2dev, param, init_command))
1774 return -EIO;
1775
1776 if (ps2_command(ps2dev, NULL, repeated_command) ||
1777 ps2_command(ps2dev, NULL, repeated_command) ||
1778 ps2_command(ps2dev, NULL, repeated_command))
1779 return -EIO;
1780
1781 param[0] = param[1] = param[2] = 0xff;
1782 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1783 return -EIO;
1784
1785 psmouse_dbg(psmouse, "%2.2X report: %3ph\n",
1786 repeated_command, param);
1787 return 0;
1788 }
1789
alps_check_valid_firmware_id(unsigned char id[])1790 static bool alps_check_valid_firmware_id(unsigned char id[])
1791 {
1792 if (id[0] == 0x73)
1793 return true;
1794
1795 if (id[0] == 0x88 &&
1796 (id[1] == 0x07 ||
1797 id[1] == 0x08 ||
1798 (id[1] & 0xf0) == 0xb0 ||
1799 (id[1] & 0xf0) == 0xc0)) {
1800 return true;
1801 }
1802
1803 return false;
1804 }
1805
alps_enter_command_mode(struct psmouse * psmouse)1806 static int alps_enter_command_mode(struct psmouse *psmouse)
1807 {
1808 unsigned char param[4];
1809
1810 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1811 psmouse_err(psmouse, "failed to enter command mode\n");
1812 return -1;
1813 }
1814
1815 if (!alps_check_valid_firmware_id(param)) {
1816 psmouse_dbg(psmouse,
1817 "unknown response while entering command mode\n");
1818 return -1;
1819 }
1820 return 0;
1821 }
1822
alps_exit_command_mode(struct psmouse * psmouse)1823 static inline int alps_exit_command_mode(struct psmouse *psmouse)
1824 {
1825 struct ps2dev *ps2dev = &psmouse->ps2dev;
1826 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1827 return -1;
1828 return 0;
1829 }
1830
1831 /*
1832 * For DualPoint devices select the device that should respond to
1833 * subsequent commands. It looks like glidepad is behind stickpointer,
1834 * I'd thought it would be other way around...
1835 */
alps_passthrough_mode_v2(struct psmouse * psmouse,bool enable)1836 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1837 {
1838 struct ps2dev *ps2dev = &psmouse->ps2dev;
1839 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1840
1841 if (ps2_command(ps2dev, NULL, cmd) ||
1842 ps2_command(ps2dev, NULL, cmd) ||
1843 ps2_command(ps2dev, NULL, cmd) ||
1844 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1845 return -1;
1846
1847 /* we may get 3 more bytes, just ignore them */
1848 ps2_drain(ps2dev, 3, 100);
1849
1850 return 0;
1851 }
1852
alps_absolute_mode_v1_v2(struct psmouse * psmouse)1853 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1854 {
1855 struct ps2dev *ps2dev = &psmouse->ps2dev;
1856
1857 /* Try ALPS magic knock - 4 disable before enable */
1858 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1859 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1860 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1861 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1862 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1863 return -1;
1864
1865 /*
1866 * Switch mouse to poll (remote) mode so motion data will not
1867 * get in our way
1868 */
1869 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1870 }
1871
alps_monitor_mode_send_word(struct psmouse * psmouse,u16 word)1872 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word)
1873 {
1874 int i, nibble;
1875
1876 /*
1877 * b0-b11 are valid bits, send sequence is inverse.
1878 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1
1879 */
1880 for (i = 0; i <= 8; i += 4) {
1881 nibble = (word >> i) & 0xf;
1882 if (alps_command_mode_send_nibble(psmouse, nibble))
1883 return -1;
1884 }
1885
1886 return 0;
1887 }
1888
alps_monitor_mode_write_reg(struct psmouse * psmouse,u16 addr,u16 value)1889 static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1890 u16 addr, u16 value)
1891 {
1892 struct ps2dev *ps2dev = &psmouse->ps2dev;
1893
1894 /* 0x0A0 is the command to write the word */
1895 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1896 alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1897 alps_monitor_mode_send_word(psmouse, addr) ||
1898 alps_monitor_mode_send_word(psmouse, value) ||
1899 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1900 return -1;
1901
1902 return 0;
1903 }
1904
alps_monitor_mode(struct psmouse * psmouse,bool enable)1905 static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1906 {
1907 struct ps2dev *ps2dev = &psmouse->ps2dev;
1908
1909 if (enable) {
1910 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1911 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1912 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1913 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1914 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1915 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1916 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1917 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1918 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1919 return -1;
1920 } else {
1921 /* EC to exit monitor mode */
1922 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1923 return -1;
1924 }
1925
1926 return 0;
1927 }
1928
alps_absolute_mode_v6(struct psmouse * psmouse)1929 static int alps_absolute_mode_v6(struct psmouse *psmouse)
1930 {
1931 u16 reg_val = 0x181;
1932 int ret;
1933
1934 /* enter monitor mode, to write the register */
1935 if (alps_monitor_mode(psmouse, true))
1936 return -1;
1937
1938 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1939
1940 if (alps_monitor_mode(psmouse, false))
1941 ret = -1;
1942
1943 return ret;
1944 }
1945
alps_get_status(struct psmouse * psmouse,char * param)1946 static int alps_get_status(struct psmouse *psmouse, char *param)
1947 {
1948 /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1949 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param))
1950 return -1;
1951
1952 return 0;
1953 }
1954
1955 /*
1956 * Turn touchpad tapping on or off. The sequences are:
1957 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1958 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1959 * My guess that 0xE9 (GetInfo) is here as a sync point.
1960 * For models that also have stickpointer (DualPoints) its tapping
1961 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1962 * we don't fiddle with it.
1963 */
alps_tap_mode(struct psmouse * psmouse,int enable)1964 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1965 {
1966 struct ps2dev *ps2dev = &psmouse->ps2dev;
1967 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1968 unsigned char tap_arg = enable ? 0x0A : 0x00;
1969 unsigned char param[4];
1970
1971 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1972 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1973 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1974 ps2_command(ps2dev, &tap_arg, cmd))
1975 return -1;
1976
1977 if (alps_get_status(psmouse, param))
1978 return -1;
1979
1980 return 0;
1981 }
1982
1983 /*
1984 * alps_poll() - poll the touchpad for current motion packet.
1985 * Used in resync.
1986 */
alps_poll(struct psmouse * psmouse)1987 static int alps_poll(struct psmouse *psmouse)
1988 {
1989 struct alps_data *priv = psmouse->private;
1990 unsigned char buf[sizeof(psmouse->packet)];
1991 bool poll_failed;
1992
1993 if (priv->flags & ALPS_PASS)
1994 alps_passthrough_mode_v2(psmouse, true);
1995
1996 poll_failed = ps2_command(&psmouse->ps2dev, buf,
1997 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1998
1999 if (priv->flags & ALPS_PASS)
2000 alps_passthrough_mode_v2(psmouse, false);
2001
2002 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
2003 return -1;
2004
2005 if ((psmouse->badbyte & 0xc8) == 0x08) {
2006 /*
2007 * Poll the track stick ...
2008 */
2009 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
2010 return -1;
2011 }
2012
2013 memcpy(psmouse->packet, buf, sizeof(buf));
2014 return 0;
2015 }
2016
alps_hw_init_v1_v2(struct psmouse * psmouse)2017 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2018 {
2019 struct alps_data *priv = psmouse->private;
2020
2021 if ((priv->flags & ALPS_PASS) &&
2022 alps_passthrough_mode_v2(psmouse, true)) {
2023 return -1;
2024 }
2025
2026 if (alps_tap_mode(psmouse, true)) {
2027 psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2028 return -1;
2029 }
2030
2031 if (alps_absolute_mode_v1_v2(psmouse)) {
2032 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2033 return -1;
2034 }
2035
2036 if ((priv->flags & ALPS_PASS) &&
2037 alps_passthrough_mode_v2(psmouse, false)) {
2038 return -1;
2039 }
2040
2041 /* ALPS needs stream mode, otherwise it won't report any data */
2042 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2043 psmouse_err(psmouse, "Failed to enable stream mode\n");
2044 return -1;
2045 }
2046
2047 return 0;
2048 }
2049
2050 /* Must be in passthrough mode when calling this function */
alps_trackstick_enter_extended_mode_v3_v6(struct psmouse * psmouse)2051 static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse)
2052 {
2053 unsigned char param[2] = {0xC8, 0x14};
2054
2055 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2056 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2057 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2058 ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2059 ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2060 return -1;
2061
2062 return 0;
2063 }
2064
alps_hw_init_v6(struct psmouse * psmouse)2065 static int alps_hw_init_v6(struct psmouse *psmouse)
2066 {
2067 int ret;
2068
2069 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */
2070 if (alps_passthrough_mode_v2(psmouse, true))
2071 return -1;
2072
2073 ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse);
2074
2075 if (alps_passthrough_mode_v2(psmouse, false))
2076 return -1;
2077
2078 if (ret)
2079 return ret;
2080
2081 if (alps_absolute_mode_v6(psmouse)) {
2082 psmouse_err(psmouse, "Failed to enable absolute mode\n");
2083 return -1;
2084 }
2085
2086 return 0;
2087 }
2088
2089 /*
2090 * Enable or disable passthrough mode to the trackstick.
2091 */
alps_passthrough_mode_v3(struct psmouse * psmouse,int reg_base,bool enable)2092 static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2093 int reg_base, bool enable)
2094 {
2095 int reg_val, ret = -1;
2096
2097 if (alps_enter_command_mode(psmouse))
2098 return -1;
2099
2100 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2101 if (reg_val == -1)
2102 goto error;
2103
2104 if (enable)
2105 reg_val |= 0x01;
2106 else
2107 reg_val &= ~0x01;
2108
2109 ret = __alps_command_mode_write_reg(psmouse, reg_val);
2110
2111 error:
2112 if (alps_exit_command_mode(psmouse))
2113 ret = -1;
2114 return ret;
2115 }
2116
2117 /* Must be in command mode when calling this function */
alps_absolute_mode_v3(struct psmouse * psmouse)2118 static int alps_absolute_mode_v3(struct psmouse *psmouse)
2119 {
2120 int reg_val;
2121
2122 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2123 if (reg_val == -1)
2124 return -1;
2125
2126 reg_val |= 0x06;
2127 if (__alps_command_mode_write_reg(psmouse, reg_val))
2128 return -1;
2129
2130 return 0;
2131 }
2132
alps_probe_trackstick_v3_v7(struct psmouse * psmouse,int reg_base)2133 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2134 {
2135 int ret = -EIO, reg_val;
2136
2137 if (alps_enter_command_mode(psmouse))
2138 goto error;
2139
2140 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2141 if (reg_val == -1)
2142 goto error;
2143
2144 /* bit 7: trackstick is present */
2145 ret = reg_val & 0x80 ? 0 : -ENODEV;
2146
2147 error:
2148 alps_exit_command_mode(psmouse);
2149 return ret;
2150 }
2151
alps_setup_trackstick_v3(struct psmouse * psmouse,int reg_base)2152 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2153 {
2154 int ret = 0;
2155 int reg_val;
2156 unsigned char param[4];
2157
2158 /*
2159 * We need to configure trackstick to report data for touchpad in
2160 * extended format. And also we need to tell touchpad to expect data
2161 * from trackstick in extended format. Without this configuration
2162 * trackstick packets sent from touchpad are in basic format which is
2163 * different from what we expect.
2164 */
2165
2166 if (alps_passthrough_mode_v3(psmouse, reg_base, true))
2167 return -EIO;
2168
2169 /*
2170 * E7 report for the trackstick
2171 *
2172 * There have been reports of failures to seem to trace back
2173 * to the above trackstick check failing. When these occur
2174 * this E7 report fails, so when that happens we continue
2175 * with the assumption that there isn't a trackstick after
2176 * all.
2177 */
2178 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2179 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2180 ret = -ENODEV;
2181 } else {
2182 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2183 if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) {
2184 psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n");
2185 ret = -EIO;
2186 }
2187 }
2188
2189 if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2190 return -EIO;
2191
2192 if (ret)
2193 return ret;
2194
2195 if (alps_enter_command_mode(psmouse))
2196 return -EIO;
2197
2198 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2199 if (reg_val == -1) {
2200 ret = -EIO;
2201 } else {
2202 /*
2203 * Tell touchpad that trackstick is now in extended mode.
2204 * If bit 1 isn't set the packet format is different.
2205 */
2206 reg_val |= BIT(1);
2207 if (__alps_command_mode_write_reg(psmouse, reg_val))
2208 ret = -EIO;
2209 }
2210
2211 if (alps_exit_command_mode(psmouse))
2212 return -EIO;
2213
2214 return ret;
2215 }
2216
alps_hw_init_v3(struct psmouse * psmouse)2217 static int alps_hw_init_v3(struct psmouse *psmouse)
2218 {
2219 struct alps_data *priv = psmouse->private;
2220 struct ps2dev *ps2dev = &psmouse->ps2dev;
2221 int reg_val;
2222 unsigned char param[4];
2223
2224 if ((priv->flags & ALPS_DUALPOINT) &&
2225 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2226 goto error;
2227
2228 if (alps_enter_command_mode(psmouse) ||
2229 alps_absolute_mode_v3(psmouse)) {
2230 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2231 goto error;
2232 }
2233
2234 reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2235 if (reg_val == -1)
2236 goto error;
2237 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2238 goto error;
2239
2240 reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2241 if (reg_val == -1)
2242 goto error;
2243 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2244 goto error;
2245
2246 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2247 goto error;
2248 if (__alps_command_mode_write_reg(psmouse, 0x04))
2249 goto error;
2250
2251 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2252 goto error;
2253 if (__alps_command_mode_write_reg(psmouse, 0x03))
2254 goto error;
2255
2256 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2257 goto error;
2258 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2259 goto error;
2260
2261 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2262 goto error;
2263 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2264 goto error;
2265
2266 alps_exit_command_mode(psmouse);
2267
2268 /* Set rate and enable data reporting */
2269 param[0] = 0x64;
2270 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2271 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2272 psmouse_err(psmouse, "Failed to enable data reporting\n");
2273 return -1;
2274 }
2275
2276 return 0;
2277
2278 error:
2279 /*
2280 * Leaving the touchpad in command mode will essentially render
2281 * it unusable until the machine reboots, so exit it here just
2282 * to be safe
2283 */
2284 alps_exit_command_mode(psmouse);
2285 return -1;
2286 }
2287
alps_get_v3_v7_resolution(struct psmouse * psmouse,int reg_pitch)2288 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch)
2289 {
2290 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys;
2291 struct alps_data *priv = psmouse->private;
2292
2293 reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2294 if (reg < 0)
2295 return reg;
2296
2297 x_pitch = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
2298 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2299
2300 y_pitch = (s8)reg >> 4; /* sign extend upper 4 bits */
2301 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2302
2303 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2304 if (reg < 0)
2305 return reg;
2306
2307 x_electrode = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */
2308 x_electrode = 17 + x_electrode;
2309
2310 y_electrode = (s8)reg >> 4; /* sign extend upper 4 bits */
2311 y_electrode = 13 + y_electrode;
2312
2313 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2314 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2315
2316 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2317 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2318
2319 psmouse_dbg(psmouse,
2320 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n",
2321 x_pitch, y_pitch, x_electrode, y_electrode,
2322 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res);
2323
2324 return 0;
2325 }
2326
alps_hw_init_rushmore_v3(struct psmouse * psmouse)2327 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2328 {
2329 struct alps_data *priv = psmouse->private;
2330 struct ps2dev *ps2dev = &psmouse->ps2dev;
2331 int reg_val, ret = -1;
2332
2333 if (priv->flags & ALPS_DUALPOINT) {
2334 reg_val = alps_setup_trackstick_v3(psmouse,
2335 ALPS_REG_BASE_RUSHMORE);
2336 if (reg_val == -EIO)
2337 goto error;
2338 }
2339
2340 if (alps_enter_command_mode(psmouse) ||
2341 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2342 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2343 goto error;
2344
2345 if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2346 goto error;
2347
2348 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2349 if (reg_val == -1)
2350 goto error;
2351 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2352 goto error;
2353
2354 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2355 goto error;
2356
2357 /* enter absolute mode */
2358 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2359 if (reg_val == -1)
2360 goto error;
2361 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2362 goto error;
2363
2364 alps_exit_command_mode(psmouse);
2365 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2366
2367 error:
2368 alps_exit_command_mode(psmouse);
2369 return ret;
2370 }
2371
2372 /* Must be in command mode when calling this function */
alps_absolute_mode_v4(struct psmouse * psmouse)2373 static int alps_absolute_mode_v4(struct psmouse *psmouse)
2374 {
2375 int reg_val;
2376
2377 reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2378 if (reg_val == -1)
2379 return -1;
2380
2381 reg_val |= 0x02;
2382 if (__alps_command_mode_write_reg(psmouse, reg_val))
2383 return -1;
2384
2385 return 0;
2386 }
2387
alps_hw_init_v4(struct psmouse * psmouse)2388 static int alps_hw_init_v4(struct psmouse *psmouse)
2389 {
2390 struct ps2dev *ps2dev = &psmouse->ps2dev;
2391 unsigned char param[4];
2392
2393 if (alps_enter_command_mode(psmouse))
2394 goto error;
2395
2396 if (alps_absolute_mode_v4(psmouse)) {
2397 psmouse_err(psmouse, "Failed to enter absolute mode\n");
2398 goto error;
2399 }
2400
2401 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2402 goto error;
2403
2404 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2405 goto error;
2406
2407 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2408 goto error;
2409
2410 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2411 goto error;
2412
2413 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2414 goto error;
2415
2416 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2417 goto error;
2418
2419 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2420 goto error;
2421
2422 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2423 goto error;
2424
2425 alps_exit_command_mode(psmouse);
2426
2427 /*
2428 * This sequence changes the output from a 9-byte to an
2429 * 8-byte format. All the same data seems to be present,
2430 * just in a more compact format.
2431 */
2432 param[0] = 0xc8;
2433 param[1] = 0x64;
2434 param[2] = 0x50;
2435 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2436 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) ||
2437 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) ||
2438 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2439 return -1;
2440
2441 /* Set rate and enable data reporting */
2442 param[0] = 0x64;
2443 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2444 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2445 psmouse_err(psmouse, "Failed to enable data reporting\n");
2446 return -1;
2447 }
2448
2449 return 0;
2450
2451 error:
2452 /*
2453 * Leaving the touchpad in command mode will essentially render
2454 * it unusable until the machine reboots, so exit it here just
2455 * to be safe
2456 */
2457 alps_exit_command_mode(psmouse);
2458 return -1;
2459 }
2460
alps_get_otp_values_ss4_v2(struct psmouse * psmouse,unsigned char index,unsigned char otp[])2461 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2462 unsigned char index, unsigned char otp[])
2463 {
2464 struct ps2dev *ps2dev = &psmouse->ps2dev;
2465
2466 switch (index) {
2467 case 0:
2468 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2469 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2470 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2471 return -1;
2472
2473 break;
2474
2475 case 1:
2476 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2477 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2478 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2479 return -1;
2480
2481 break;
2482 }
2483
2484 return 0;
2485 }
2486
alps_update_device_area_ss4_v2(unsigned char otp[][4],struct alps_data * priv)2487 static int alps_update_device_area_ss4_v2(unsigned char otp[][4],
2488 struct alps_data *priv)
2489 {
2490 int num_x_electrode;
2491 int num_y_electrode;
2492 int x_pitch, y_pitch, x_phys, y_phys;
2493
2494 if (IS_SS4PLUS_DEV(priv->dev_id)) {
2495 num_x_electrode =
2496 SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
2497 num_y_electrode =
2498 SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
2499
2500 priv->x_max =
2501 (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2502 priv->y_max =
2503 (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2504
2505 x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2506 y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2507
2508 } else {
2509 num_x_electrode =
2510 SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2511 num_y_electrode =
2512 SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2513
2514 priv->x_max =
2515 (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2516 priv->y_max =
2517 (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2518
2519 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2520 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2521 }
2522
2523 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2524 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2525
2526 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2527 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2528
2529 return 0;
2530 }
2531
alps_update_btn_info_ss4_v2(unsigned char otp[][4],struct alps_data * priv)2532 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4],
2533 struct alps_data *priv)
2534 {
2535 unsigned char is_btnless;
2536
2537 if (IS_SS4PLUS_DEV(priv->dev_id))
2538 is_btnless = (otp[1][0] >> 1) & 0x01;
2539 else
2540 is_btnless = (otp[1][1] >> 3) & 0x01;
2541
2542 if (is_btnless)
2543 priv->flags |= ALPS_BUTTONPAD;
2544
2545 return 0;
2546 }
2547
alps_update_dual_info_ss4_v2(unsigned char otp[][4],struct alps_data * priv,struct psmouse * psmouse)2548 static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
2549 struct alps_data *priv,
2550 struct psmouse *psmouse)
2551 {
2552 bool is_dual = false;
2553 int reg_val = 0;
2554 struct ps2dev *ps2dev = &psmouse->ps2dev;
2555
2556 if (IS_SS4PLUS_DEV(priv->dev_id)) {
2557 is_dual = (otp[0][0] >> 4) & 0x01;
2558
2559 if (!is_dual) {
2560 /* For support TrackStick of Thinkpad L/E series */
2561 if (alps_exit_command_mode(psmouse) == 0 &&
2562 alps_enter_command_mode(psmouse) == 0) {
2563 reg_val = alps_command_mode_read_reg(psmouse,
2564 0xD7);
2565 }
2566 alps_exit_command_mode(psmouse);
2567 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2568
2569 if (reg_val == 0x0C || reg_val == 0x1D)
2570 is_dual = true;
2571 }
2572 }
2573
2574 if (is_dual)
2575 priv->flags |= ALPS_DUALPOINT |
2576 ALPS_DUALPOINT_WITH_PRESSURE;
2577
2578 return 0;
2579 }
2580
alps_set_defaults_ss4_v2(struct psmouse * psmouse,struct alps_data * priv)2581 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2582 struct alps_data *priv)
2583 {
2584 unsigned char otp[2][4];
2585
2586 memset(otp, 0, sizeof(otp));
2587
2588 if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) ||
2589 alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]))
2590 return -1;
2591
2592 alps_update_device_area_ss4_v2(otp, priv);
2593
2594 alps_update_btn_info_ss4_v2(otp, priv);
2595
2596 alps_update_dual_info_ss4_v2(otp, priv, psmouse);
2597
2598 return 0;
2599 }
2600
alps_dolphin_get_device_area(struct psmouse * psmouse,struct alps_data * priv)2601 static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2602 struct alps_data *priv)
2603 {
2604 struct ps2dev *ps2dev = &psmouse->ps2dev;
2605 unsigned char param[4] = {0};
2606 int num_x_electrode, num_y_electrode;
2607
2608 if (alps_enter_command_mode(psmouse))
2609 return -1;
2610
2611 param[0] = 0x0a;
2612 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2613 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2614 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2615 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2616 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE))
2617 return -1;
2618
2619 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
2620 return -1;
2621
2622 /*
2623 * Dolphin's sensor line number is not fixed. It can be calculated
2624 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET.
2625 * Further more, we can get device's x_max and y_max by multiplying
2626 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE.
2627 *
2628 * e.g. When we get register's sensor_x = 11 & sensor_y = 8,
2629 * real sensor line number X = 11 + 8 = 19, and
2630 * real sensor line number Y = 8 + 1 = 9.
2631 * So, x_max = (19 - 1) * 64 = 1152, and
2632 * y_max = (9 - 1) * 64 = 512.
2633 */
2634 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2635 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2636 priv->x_bits = num_x_electrode;
2637 priv->y_bits = num_y_electrode;
2638 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2639 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2640
2641 if (alps_exit_command_mode(psmouse))
2642 return -1;
2643
2644 return 0;
2645 }
2646
alps_hw_init_dolphin_v1(struct psmouse * psmouse)2647 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2648 {
2649 struct ps2dev *ps2dev = &psmouse->ps2dev;
2650 unsigned char param[2];
2651
2652 /* This is dolphin "v1" as empirically defined by florin9doi */
2653 param[0] = 0x64;
2654 param[1] = 0x28;
2655
2656 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2657 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2658 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2659 return -1;
2660
2661 return 0;
2662 }
2663
alps_hw_init_v7(struct psmouse * psmouse)2664 static int alps_hw_init_v7(struct psmouse *psmouse)
2665 {
2666 struct ps2dev *ps2dev = &psmouse->ps2dev;
2667 int reg_val, ret = -1;
2668
2669 if (alps_enter_command_mode(psmouse) ||
2670 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2671 goto error;
2672
2673 if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2674 goto error;
2675
2676 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2677 goto error;
2678
2679 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2680 if (reg_val == -1)
2681 goto error;
2682 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2683 goto error;
2684
2685 alps_exit_command_mode(psmouse);
2686 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2687
2688 error:
2689 alps_exit_command_mode(psmouse);
2690 return ret;
2691 }
2692
alps_hw_init_ss4_v2(struct psmouse * psmouse)2693 static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2694 {
2695 struct ps2dev *ps2dev = &psmouse->ps2dev;
2696 char param[2] = {0x64, 0x28};
2697 int ret = -1;
2698
2699 /* enter absolute mode */
2700 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2701 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2702 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2703 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) {
2704 goto error;
2705 }
2706
2707 /* T.B.D. Decread noise packet number, delete in the future */
2708 if (alps_exit_command_mode(psmouse) ||
2709 alps_enter_command_mode(psmouse) ||
2710 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2711 goto error;
2712 }
2713 alps_exit_command_mode(psmouse);
2714
2715 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2716
2717 error:
2718 alps_exit_command_mode(psmouse);
2719 return ret;
2720 }
2721
alps_set_protocol(struct psmouse * psmouse,struct alps_data * priv,const struct alps_protocol_info * protocol)2722 static int alps_set_protocol(struct psmouse *psmouse,
2723 struct alps_data *priv,
2724 const struct alps_protocol_info *protocol)
2725 {
2726 psmouse->private = priv;
2727
2728 timer_setup(&priv->timer, alps_flush_packet, 0);
2729
2730 priv->proto_version = protocol->version;
2731 priv->byte0 = protocol->byte0;
2732 priv->mask0 = protocol->mask0;
2733 priv->flags = protocol->flags;
2734
2735 priv->x_max = 2000;
2736 priv->y_max = 1400;
2737 priv->x_bits = 15;
2738 priv->y_bits = 11;
2739
2740 switch (priv->proto_version) {
2741 case ALPS_PROTO_V1:
2742 case ALPS_PROTO_V2:
2743 priv->hw_init = alps_hw_init_v1_v2;
2744 priv->process_packet = alps_process_packet_v1_v2;
2745 priv->set_abs_params = alps_set_abs_params_st;
2746 priv->x_max = 1023;
2747 priv->y_max = 767;
2748 if (dmi_check_system(alps_dmi_has_separate_stick_buttons))
2749 priv->flags |= ALPS_STICK_BITS;
2750 break;
2751
2752 case ALPS_PROTO_V3:
2753 priv->hw_init = alps_hw_init_v3;
2754 priv->process_packet = alps_process_packet_v3;
2755 priv->set_abs_params = alps_set_abs_params_semi_mt;
2756 priv->decode_fields = alps_decode_pinnacle;
2757 priv->nibble_commands = alps_v3_nibble_commands;
2758 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2759
2760 if (alps_probe_trackstick_v3_v7(psmouse,
2761 ALPS_REG_BASE_PINNACLE) < 0)
2762 priv->flags &= ~ALPS_DUALPOINT;
2763
2764 break;
2765
2766 case ALPS_PROTO_V3_RUSHMORE:
2767 priv->hw_init = alps_hw_init_rushmore_v3;
2768 priv->process_packet = alps_process_packet_v3;
2769 priv->set_abs_params = alps_set_abs_params_semi_mt;
2770 priv->decode_fields = alps_decode_rushmore;
2771 priv->nibble_commands = alps_v3_nibble_commands;
2772 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2773 priv->x_bits = 16;
2774 priv->y_bits = 12;
2775
2776 if (alps_probe_trackstick_v3_v7(psmouse,
2777 ALPS_REG_BASE_RUSHMORE) < 0)
2778 priv->flags &= ~ALPS_DUALPOINT;
2779
2780 break;
2781
2782 case ALPS_PROTO_V4:
2783 priv->hw_init = alps_hw_init_v4;
2784 priv->process_packet = alps_process_packet_v4;
2785 priv->set_abs_params = alps_set_abs_params_semi_mt;
2786 priv->nibble_commands = alps_v4_nibble_commands;
2787 priv->addr_command = PSMOUSE_CMD_DISABLE;
2788 break;
2789
2790 case ALPS_PROTO_V5:
2791 priv->hw_init = alps_hw_init_dolphin_v1;
2792 priv->process_packet = alps_process_touchpad_packet_v3_v5;
2793 priv->decode_fields = alps_decode_dolphin;
2794 priv->set_abs_params = alps_set_abs_params_semi_mt;
2795 priv->nibble_commands = alps_v3_nibble_commands;
2796 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2797 priv->x_bits = 23;
2798 priv->y_bits = 12;
2799
2800 if (alps_dolphin_get_device_area(psmouse, priv))
2801 return -EIO;
2802
2803 break;
2804
2805 case ALPS_PROTO_V6:
2806 priv->hw_init = alps_hw_init_v6;
2807 priv->process_packet = alps_process_packet_v6;
2808 priv->set_abs_params = alps_set_abs_params_st;
2809 priv->nibble_commands = alps_v6_nibble_commands;
2810 priv->x_max = 2047;
2811 priv->y_max = 1535;
2812 break;
2813
2814 case ALPS_PROTO_V7:
2815 priv->hw_init = alps_hw_init_v7;
2816 priv->process_packet = alps_process_packet_v7;
2817 priv->decode_fields = alps_decode_packet_v7;
2818 priv->set_abs_params = alps_set_abs_params_v7;
2819 priv->nibble_commands = alps_v3_nibble_commands;
2820 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2821 priv->x_max = 0xfff;
2822 priv->y_max = 0x7ff;
2823
2824 if (priv->fw_ver[1] != 0xba)
2825 priv->flags |= ALPS_BUTTONPAD;
2826
2827 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2828 priv->flags &= ~ALPS_DUALPOINT;
2829
2830 break;
2831
2832 case ALPS_PROTO_V8:
2833 priv->hw_init = alps_hw_init_ss4_v2;
2834 priv->process_packet = alps_process_packet_ss4_v2;
2835 priv->decode_fields = alps_decode_ss4_v2;
2836 priv->set_abs_params = alps_set_abs_params_ss4_v2;
2837 priv->nibble_commands = alps_v3_nibble_commands;
2838 priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2839
2840 if (alps_set_defaults_ss4_v2(psmouse, priv))
2841 return -EIO;
2842
2843 break;
2844 }
2845
2846 return 0;
2847 }
2848
alps_match_table(unsigned char * e7,unsigned char * ec)2849 static const struct alps_protocol_info *alps_match_table(unsigned char *e7,
2850 unsigned char *ec)
2851 {
2852 const struct alps_model_info *model;
2853 int i;
2854
2855 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2856 model = &alps_model_data[i];
2857
2858 if (!memcmp(e7, model->signature, sizeof(model->signature)))
2859 return &model->protocol_info;
2860 }
2861
2862 return NULL;
2863 }
2864
alps_is_cs19_trackpoint(struct psmouse * psmouse)2865 static bool alps_is_cs19_trackpoint(struct psmouse *psmouse)
2866 {
2867 u8 param[2] = { 0 };
2868
2869 if (ps2_command(&psmouse->ps2dev,
2870 param, MAKE_PS2_CMD(0, 2, TP_READ_ID)))
2871 return false;
2872
2873 /*
2874 * param[0] contains the trackpoint device variant_id while
2875 * param[1] contains the firmware_id. So far all alps
2876 * trackpoint-only devices have their variant_ids equal
2877 * TP_VARIANT_ALPS and their firmware_ids are in 0x20~0x2f range.
2878 */
2879 return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20);
2880 }
2881
alps_identify(struct psmouse * psmouse,struct alps_data * priv)2882 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv)
2883 {
2884 const struct alps_protocol_info *protocol;
2885 unsigned char e6[4], e7[4], ec[4];
2886 int error;
2887
2888 /*
2889 * First try "E6 report".
2890 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
2891 * The bits 0-2 of the first byte will be 1s if some buttons are
2892 * pressed.
2893 */
2894 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2895 PSMOUSE_CMD_SETSCALE11, e6))
2896 return -EIO;
2897
2898 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100))
2899 return -EINVAL;
2900
2901 /*
2902 * Now get the "E7" and "EC" reports. These will uniquely identify
2903 * most ALPS touchpads.
2904 */
2905 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2906 PSMOUSE_CMD_SETSCALE21, e7) ||
2907 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2908 PSMOUSE_CMD_RESET_WRAP, ec) ||
2909 alps_exit_command_mode(psmouse))
2910 return -EIO;
2911
2912 protocol = alps_match_table(e7, ec);
2913 if (!protocol) {
2914 if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
2915 ec[2] == 0x8a) {
2916 protocol = &alps_v4_protocol_data;
2917 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2918 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2919 protocol = &alps_v5_protocol_data;
2920 } else if (ec[0] == 0x88 &&
2921 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2922 protocol = &alps_v7_protocol_data;
2923 } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2924 protocol = &alps_v3_rushmore_data;
2925 } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2926 ec[2] >= 0x90 && ec[2] <= 0x9d) {
2927 protocol = &alps_v3_protocol_data;
2928 } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2929 (e7[2] == 0x14 || e7[2] == 0x28)) {
2930 protocol = &alps_v8_protocol_data;
2931 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
2932 protocol = &alps_v9_protocol_data;
2933 psmouse_warn(psmouse,
2934 "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
2935 e7, ec);
2936 return -EINVAL;
2937 } else {
2938 psmouse_dbg(psmouse,
2939 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec);
2940 return -EINVAL;
2941 }
2942 }
2943
2944 if (priv) {
2945 /* Save Device ID and Firmware version */
2946 memcpy(priv->dev_id, e7, 3);
2947 memcpy(priv->fw_ver, ec, 3);
2948 error = alps_set_protocol(psmouse, priv, protocol);
2949 if (error)
2950 return error;
2951 }
2952
2953 return 0;
2954 }
2955
alps_reconnect(struct psmouse * psmouse)2956 static int alps_reconnect(struct psmouse *psmouse)
2957 {
2958 struct alps_data *priv = psmouse->private;
2959
2960 psmouse_reset(psmouse);
2961
2962 if (alps_identify(psmouse, priv) < 0)
2963 return -1;
2964
2965 return priv->hw_init(psmouse);
2966 }
2967
alps_disconnect(struct psmouse * psmouse)2968 static void alps_disconnect(struct psmouse *psmouse)
2969 {
2970 struct alps_data *priv = psmouse->private;
2971
2972 psmouse_reset(psmouse);
2973 timer_shutdown_sync(&priv->timer);
2974 if (priv->dev2)
2975 input_unregister_device(priv->dev2);
2976 if (!IS_ERR_OR_NULL(priv->dev3))
2977 input_unregister_device(priv->dev3);
2978 kfree(priv);
2979 }
2980
alps_set_abs_params_st(struct alps_data * priv,struct input_dev * dev1)2981 static void alps_set_abs_params_st(struct alps_data *priv,
2982 struct input_dev *dev1)
2983 {
2984 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2985 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2986 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2987 }
2988
alps_set_abs_params_mt_common(struct alps_data * priv,struct input_dev * dev1)2989 static void alps_set_abs_params_mt_common(struct alps_data *priv,
2990 struct input_dev *dev1)
2991 {
2992 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2993 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2994
2995 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2996 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2997
2998 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2999 set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
3000 }
3001
alps_set_abs_params_semi_mt(struct alps_data * priv,struct input_dev * dev1)3002 static void alps_set_abs_params_semi_mt(struct alps_data *priv,
3003 struct input_dev *dev1)
3004 {
3005 alps_set_abs_params_mt_common(priv, dev1);
3006 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3007
3008 input_mt_init_slots(dev1, MAX_TOUCHES,
3009 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3010 INPUT_MT_SEMI_MT);
3011 }
3012
alps_set_abs_params_v7(struct alps_data * priv,struct input_dev * dev1)3013 static void alps_set_abs_params_v7(struct alps_data *priv,
3014 struct input_dev *dev1)
3015 {
3016 alps_set_abs_params_mt_common(priv, dev1);
3017 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3018
3019 input_mt_init_slots(dev1, MAX_TOUCHES,
3020 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3021 INPUT_MT_TRACK);
3022
3023 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3024 }
3025
alps_set_abs_params_ss4_v2(struct alps_data * priv,struct input_dev * dev1)3026 static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
3027 struct input_dev *dev1)
3028 {
3029 alps_set_abs_params_mt_common(priv, dev1);
3030 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3031 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3032
3033 input_mt_init_slots(dev1, MAX_TOUCHES,
3034 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3035 INPUT_MT_TRACK);
3036 }
3037
alps_init(struct psmouse * psmouse)3038 int alps_init(struct psmouse *psmouse)
3039 {
3040 struct alps_data *priv = psmouse->private;
3041 struct input_dev *dev1 = psmouse->dev;
3042 int error;
3043
3044 error = priv->hw_init(psmouse);
3045 if (error)
3046 goto init_fail;
3047
3048 /*
3049 * Undo part of setup done for us by psmouse core since touchpad
3050 * is not a relative device.
3051 */
3052 __clear_bit(EV_REL, dev1->evbit);
3053 __clear_bit(REL_X, dev1->relbit);
3054 __clear_bit(REL_Y, dev1->relbit);
3055
3056 /*
3057 * Now set up our capabilities.
3058 */
3059 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
3060 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
3061 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
3062 dev1->keybit[BIT_WORD(BTN_LEFT)] |=
3063 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
3064
3065 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
3066
3067 priv->set_abs_params(priv, dev1);
3068
3069 if (priv->flags & ALPS_WHEEL) {
3070 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
3071 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
3072 }
3073
3074 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
3075 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
3076 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
3077 }
3078
3079 if (priv->flags & ALPS_FOUR_BUTTONS) {
3080 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
3081 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
3082 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
3083 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
3084 } else if (priv->flags & ALPS_BUTTONPAD) {
3085 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
3086 clear_bit(BTN_RIGHT, dev1->keybit);
3087 } else {
3088 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
3089 }
3090
3091 if (priv->flags & ALPS_DUALPOINT) {
3092 struct input_dev *dev2;
3093
3094 dev2 = input_allocate_device();
3095 if (!dev2) {
3096 psmouse_err(psmouse,
3097 "failed to allocate trackstick device\n");
3098 error = -ENOMEM;
3099 goto init_fail;
3100 }
3101
3102 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3103 psmouse->ps2dev.serio->phys);
3104 dev2->phys = priv->phys2;
3105
3106 /*
3107 * format of input device name is: "protocol vendor name"
3108 * see function psmouse_switch_protocol() in psmouse-base.c
3109 */
3110 dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3111
3112 dev2->id.bustype = BUS_I8042;
3113 dev2->id.vendor = 0x0002;
3114 dev2->id.product = PSMOUSE_ALPS;
3115 dev2->id.version = priv->proto_version;
3116 dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3117
3118 input_set_capability(dev2, EV_REL, REL_X);
3119 input_set_capability(dev2, EV_REL, REL_Y);
3120 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3121 input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3122 input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3123 }
3124 input_set_capability(dev2, EV_KEY, BTN_LEFT);
3125 input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3126 input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3127
3128 __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3129 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3130
3131 error = input_register_device(dev2);
3132 if (error) {
3133 psmouse_err(psmouse,
3134 "failed to register trackstick device: %d\n",
3135 error);
3136 input_free_device(dev2);
3137 goto init_fail;
3138 }
3139
3140 priv->dev2 = dev2;
3141 }
3142
3143 priv->psmouse = psmouse;
3144
3145 INIT_DELAYED_WORK(&priv->dev3_register_work,
3146 alps_register_bare_ps2_mouse);
3147
3148 psmouse->protocol_handler = alps_process_byte;
3149 psmouse->poll = alps_poll;
3150 psmouse->disconnect = alps_disconnect;
3151 psmouse->reconnect = alps_reconnect;
3152 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6;
3153
3154 /* We are having trouble resyncing ALPS touchpads so disable it for now */
3155 psmouse->resync_time = 0;
3156
3157 /* Allow 2 invalid packets without resetting device */
3158 psmouse->resetafter = psmouse->pktsize * 2;
3159
3160 return 0;
3161
3162 init_fail:
3163 psmouse_reset(psmouse);
3164 /*
3165 * Even though we did not allocate psmouse->private we do free
3166 * it here.
3167 */
3168 kfree(psmouse->private);
3169 psmouse->private = NULL;
3170 return error;
3171 }
3172
alps_detect(struct psmouse * psmouse,bool set_properties)3173 int alps_detect(struct psmouse *psmouse, bool set_properties)
3174 {
3175 struct alps_data *priv;
3176 int error;
3177
3178 error = alps_identify(psmouse, NULL);
3179 if (error)
3180 return error;
3181
3182 /*
3183 * ALPS cs19 is a trackpoint-only device, and uses different
3184 * protocol than DualPoint ones, so we return -EINVAL here and let
3185 * trackpoint.c drive this device. If the trackpoint driver is not
3186 * enabled, the device will fall back to a bare PS/2 mouse.
3187 * If ps2_command() fails here, we depend on the immediately
3188 * followed psmouse_reset() to reset the device to normal state.
3189 */
3190 if (alps_is_cs19_trackpoint(psmouse)) {
3191 psmouse_dbg(psmouse,
3192 "ALPS CS19 trackpoint-only device detected, ignoring\n");
3193 return -EINVAL;
3194 }
3195
3196 /*
3197 * Reset the device to make sure it is fully operational:
3198 * on some laptops, like certain Dell Latitudes, we may
3199 * fail to properly detect presence of trackstick if device
3200 * has not been reset.
3201 */
3202 psmouse_reset(psmouse);
3203
3204 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3205 if (!priv)
3206 return -ENOMEM;
3207
3208 error = alps_identify(psmouse, priv);
3209 if (error) {
3210 kfree(priv);
3211 return error;
3212 }
3213
3214 if (set_properties) {
3215 psmouse->vendor = "ALPS";
3216 psmouse->name = priv->flags & ALPS_DUALPOINT ?
3217 "DualPoint TouchPad" : "GlidePoint";
3218 psmouse->model = priv->proto_version;
3219 } else {
3220 /*
3221 * Destroy alps_data structure we allocated earlier since
3222 * this was just a "trial run". Otherwise we'll keep it
3223 * to be used by alps_init() which has to be called if
3224 * we succeed and set_properties is true.
3225 */
3226 kfree(priv);
3227 psmouse->private = NULL;
3228 }
3229
3230 return 0;
3231 }
3232
3233