Line data Source code
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 :
215 : static bool alps_is_valid_first_byte(struct alps_data *priv,
216 : unsigned char data)
217 : {
218 0 : return (data & priv->mask0) == priv->byte0;
219 : }
220 :
221 0 : 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 0 : dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1;
232 0 : input_report_key(dev, BTN_LEFT, left);
233 :
234 0 : dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1;
235 0 : input_report_key(dev, BTN_RIGHT, right);
236 :
237 0 : dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1;
238 0 : 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 0 : if (dev2)
245 : input_sync(dev2);
246 0 : }
247 :
248 0 : static void alps_process_packet_v1_v2(struct psmouse *psmouse)
249 : {
250 0 : struct alps_data *priv = psmouse->private;
251 0 : unsigned char *packet = psmouse->packet;
252 0 : struct input_dev *dev = psmouse->dev;
253 0 : struct input_dev *dev2 = priv->dev2;
254 : int x, y, z, ges, fin, left, right, middle;
255 0 : int back = 0, forward = 0;
256 :
257 0 : if (priv->proto_version == ALPS_PROTO_V1) {
258 0 : left = packet[2] & 0x10;
259 0 : right = packet[2] & 0x08;
260 0 : middle = 0;
261 0 : x = packet[1] | ((packet[0] & 0x07) << 7);
262 0 : y = packet[4] | ((packet[3] & 0x07) << 7);
263 0 : z = packet[5];
264 : } else {
265 0 : left = packet[3] & 1;
266 0 : right = packet[3] & 2;
267 0 : middle = packet[3] & 4;
268 0 : x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
269 0 : y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
270 0 : z = packet[5];
271 : }
272 :
273 0 : if (priv->flags & ALPS_FW_BK_1) {
274 0 : back = packet[0] & 0x10;
275 0 : forward = packet[2] & 4;
276 : }
277 :
278 0 : if (priv->flags & ALPS_FW_BK_2) {
279 0 : back = packet[3] & 4;
280 0 : forward = packet[2] & 4;
281 0 : if ((middle = forward && back))
282 0 : forward = back = 0;
283 : }
284 :
285 0 : ges = packet[2] & 1;
286 0 : fin = packet[2] & 2;
287 :
288 0 : if ((priv->flags & ALPS_DUALPOINT) && z == 127) {
289 0 : input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
290 0 : input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
291 :
292 0 : 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 0 : if (priv->flags & ALPS_STICK_BITS) {
300 0 : left |= packet[0] & 1;
301 0 : right |= packet[0] & 2;
302 0 : middle |= packet[0] & 4;
303 : }
304 :
305 0 : alps_report_buttons(dev, dev2, left, right, middle);
306 :
307 : /* Convert hardware tap to a reasonable Z value */
308 0 : if (ges && !fin)
309 0 : 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 0 : if (ges && fin && !priv->prev_fin) {
317 0 : input_report_abs(dev, ABS_X, x);
318 0 : input_report_abs(dev, ABS_Y, y);
319 0 : input_report_abs(dev, ABS_PRESSURE, 0);
320 0 : input_report_key(dev, BTN_TOOL_FINGER, 0);
321 : input_sync(dev);
322 : }
323 0 : priv->prev_fin = fin;
324 :
325 0 : if (z > 30)
326 : input_report_key(dev, BTN_TOUCH, 1);
327 0 : if (z < 25)
328 : input_report_key(dev, BTN_TOUCH, 0);
329 :
330 0 : if (z > 0) {
331 0 : input_report_abs(dev, ABS_X, x);
332 : input_report_abs(dev, ABS_Y, y);
333 : }
334 :
335 0 : input_report_abs(dev, ABS_PRESSURE, z);
336 0 : input_report_key(dev, BTN_TOOL_FINGER, z > 0);
337 :
338 0 : if (priv->flags & ALPS_WHEEL)
339 0 : input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
340 :
341 0 : if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
342 0 : input_report_key(dev, BTN_FORWARD, forward);
343 : input_report_key(dev, BTN_BACK, back);
344 : }
345 :
346 0 : if (priv->flags & ALPS_FOUR_BUTTONS) {
347 0 : input_report_key(dev, BTN_0, packet[2] & 4);
348 0 : input_report_key(dev, BTN_1, packet[0] & 0x10);
349 0 : input_report_key(dev, BTN_2, packet[3] & 4);
350 0 : input_report_key(dev, BTN_3, packet[0] & 0x20);
351 : }
352 :
353 : input_sync(dev);
354 : }
355 :
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 0 : for (i = 0; map != 0; i++, map >>= 1) {
366 0 : bit = map & 1;
367 0 : if (bit) {
368 0 : if (!prev_bit) {
369 0 : point->start_bit = i;
370 0 : point->num_bits = 0;
371 0 : (*fingers)++;
372 : }
373 0 : point->num_bits++;
374 : } else {
375 0 : if (prev_bit)
376 0 : point = high;
377 : }
378 0 : 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 : */
392 0 : static int alps_process_bitmap(struct alps_data *priv,
393 : struct alps_fields *fields)
394 : {
395 0 : int i, fingers_x = 0, fingers_y = 0, fingers, closest;
396 0 : struct alps_bitmap_point x_low = {0,}, x_high = {0,};
397 0 : struct alps_bitmap_point y_low = {0,}, y_high = {0,};
398 : struct input_mt_pos corner[4];
399 :
400 0 : 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 0 : 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 0 : 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 0 : if (fingers_x == 1) {
417 0 : i = (x_low.num_bits - 1) / 2;
418 0 : x_low.num_bits = x_low.num_bits - i;
419 0 : x_high.start_bit = x_low.start_bit + i;
420 0 : x_high.num_bits = max(i, 1);
421 : }
422 0 : if (fingers_y == 1) {
423 0 : i = (y_low.num_bits - 1) / 2;
424 0 : y_low.num_bits = y_low.num_bits - i;
425 0 : y_high.start_bit = y_low.start_bit + i;
426 0 : y_high.num_bits = max(i, 1);
427 : }
428 :
429 : /* top-left corner */
430 0 : corner[0].x =
431 0 : (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
432 0 : (2 * (priv->x_bits - 1));
433 0 : corner[0].y =
434 0 : (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) /
435 0 : (2 * (priv->y_bits - 1));
436 :
437 : /* top-right corner */
438 0 : corner[1].x =
439 0 : (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
440 : (2 * (priv->x_bits - 1));
441 0 : 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 0 : corner[2].x =
447 : (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) /
448 : (2 * (priv->x_bits - 1));
449 0 : corner[2].y =
450 0 : (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 0 : corner[3].x =
455 : (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) /
456 : (2 * (priv->x_bits - 1));
457 0 : 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 0 : if (priv->proto_version == ALPS_PROTO_V5) {
463 0 : for (i = 0; i < 4; i++)
464 0 : corner[i].x = priv->x_max - corner[i].x;
465 : }
466 :
467 : /* y-bitmap order is reversed on v3 and v4 touchpads */
468 0 : if (priv->proto_version == ALPS_PROTO_V3 ||
469 : priv->proto_version == ALPS_PROTO_V4) {
470 0 : for (i = 0; i < 4; i++)
471 0 : 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 0 : if (priv->second_touch == -1) {
480 : /* Find corner closest to our st coordinates */
481 : closest = 0x7fffffff;
482 0 : for (i = 0; i < 4; i++) {
483 0 : int dx = fields->st.x - corner[i].x;
484 0 : int dy = fields->st.y - corner[i].y;
485 0 : int distance = dx * dx + dy * dy;
486 :
487 0 : if (distance < closest) {
488 0 : priv->second_touch = i;
489 0 : closest = distance;
490 : }
491 : }
492 : /* And select the opposite corner to use for the 2nd touch */
493 0 : priv->second_touch = (priv->second_touch + 2) % 4;
494 : }
495 :
496 0 : fields->mt[0] = fields->st;
497 0 : fields->mt[1] = corner[priv->second_touch];
498 :
499 0 : return fingers;
500 : }
501 :
502 0 : static void alps_set_slot(struct input_dev *dev, int slot, int x, int y)
503 : {
504 0 : input_mt_slot(dev, slot);
505 0 : input_mt_report_slot_state(dev, MT_TOOL_FINGER, true);
506 0 : input_report_abs(dev, ABS_MT_POSITION_X, x);
507 0 : input_report_abs(dev, ABS_MT_POSITION_Y, y);
508 0 : }
509 :
510 0 : static void alps_report_mt_data(struct psmouse *psmouse, int n)
511 : {
512 0 : struct alps_data *priv = psmouse->private;
513 0 : struct input_dev *dev = psmouse->dev;
514 0 : struct alps_fields *f = &priv->f;
515 : int i, slot[MAX_TOUCHES];
516 :
517 0 : input_mt_assign_slots(dev, slot, f->mt, n, 0);
518 0 : for (i = 0; i < n; i++)
519 0 : alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y);
520 :
521 0 : input_mt_sync_frame(dev);
522 0 : }
523 :
524 0 : static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers)
525 : {
526 0 : struct alps_data *priv = psmouse->private;
527 0 : struct input_dev *dev = psmouse->dev;
528 0 : struct alps_fields *f = &priv->f;
529 :
530 : /* Use st data when we don't have mt data */
531 0 : if (fingers < 2) {
532 0 : f->mt[0].x = f->st.x;
533 0 : f->mt[0].y = f->st.y;
534 0 : fingers = f->pressure > 0 ? 1 : 0;
535 0 : priv->second_touch = -1;
536 : }
537 :
538 0 : if (fingers >= 1)
539 0 : alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y);
540 0 : if (fingers >= 2)
541 0 : alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y);
542 0 : input_mt_sync_frame(dev);
543 :
544 0 : input_mt_report_finger_count(dev, fingers);
545 :
546 0 : input_report_key(dev, BTN_LEFT, f->left);
547 0 : input_report_key(dev, BTN_RIGHT, f->right);
548 0 : input_report_key(dev, BTN_MIDDLE, f->middle);
549 :
550 0 : input_report_abs(dev, ABS_PRESSURE, f->pressure);
551 :
552 0 : input_sync(dev);
553 0 : }
554 :
555 0 : static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
556 : {
557 0 : struct alps_data *priv = psmouse->private;
558 0 : unsigned char *packet = psmouse->packet;
559 0 : 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 0 : if (!(priv->flags & ALPS_DUALPOINT)) {
564 0 : psmouse_warn(psmouse,
565 : "Rejected trackstick packet from non DualPoint device");
566 0 : return;
567 : }
568 :
569 : /* Sanity check packet */
570 0 : 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 0 : if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
580 : return;
581 :
582 0 : x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
583 0 : y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
584 0 : 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 0 : x /= 8;
592 0 : y /= 8;
593 :
594 0 : input_report_rel(dev, REL_X, x);
595 0 : input_report_rel(dev, REL_Y, -y);
596 0 : 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 0 : left = packet[3] & 0x01;
606 0 : right = packet[3] & 0x02;
607 0 : middle = packet[3] & 0x04;
608 :
609 0 : if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
610 : (left || right || middle))
611 0 : priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
612 :
613 0 : if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
614 0 : input_report_key(dev, BTN_LEFT, left);
615 0 : 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 :
623 0 : static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p)
624 : {
625 0 : f->left = !!(p[3] & 0x01);
626 0 : f->right = !!(p[3] & 0x02);
627 0 : f->middle = !!(p[3] & 0x04);
628 :
629 0 : f->ts_left = !!(p[3] & 0x10);
630 0 : f->ts_right = !!(p[3] & 0x20);
631 0 : f->ts_middle = !!(p[3] & 0x40);
632 0 : }
633 :
634 0 : static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p,
635 : struct psmouse *psmouse)
636 : {
637 0 : f->first_mp = !!(p[4] & 0x40);
638 0 : f->is_mp = !!(p[0] & 0x40);
639 :
640 0 : if (f->is_mp) {
641 0 : f->fingers = (p[5] & 0x3) + 1;
642 0 : f->x_map = ((p[4] & 0x7e) << 8) |
643 0 : ((p[1] & 0x7f) << 2) |
644 0 : ((p[0] & 0x30) >> 4);
645 0 : f->y_map = ((p[3] & 0x70) << 4) |
646 0 : ((p[2] & 0x7f) << 1) |
647 0 : (p[4] & 0x01);
648 : } else {
649 0 : f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
650 0 : ((p[0] & 0x30) >> 4);
651 0 : f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
652 0 : f->pressure = p[5] & 0x7f;
653 :
654 0 : alps_decode_buttons_v3(f, p);
655 : }
656 :
657 0 : return 0;
658 : }
659 :
660 0 : static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p,
661 : struct psmouse *psmouse)
662 : {
663 0 : f->first_mp = !!(p[4] & 0x40);
664 0 : f->is_mp = !!(p[5] & 0x40);
665 :
666 0 : if (f->is_mp) {
667 0 : f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1;
668 0 : f->x_map = ((p[5] & 0x10) << 11) |
669 0 : ((p[4] & 0x7e) << 8) |
670 0 : ((p[1] & 0x7f) << 2) |
671 0 : ((p[0] & 0x30) >> 4);
672 0 : f->y_map = ((p[5] & 0x20) << 6) |
673 0 : ((p[3] & 0x70) << 4) |
674 0 : ((p[2] & 0x7f) << 1) |
675 0 : (p[4] & 0x01);
676 : } else {
677 0 : f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) |
678 0 : ((p[0] & 0x30) >> 4);
679 0 : f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f);
680 0 : f->pressure = p[5] & 0x7f;
681 :
682 0 : alps_decode_buttons_v3(f, p);
683 : }
684 :
685 0 : return 0;
686 : }
687 :
688 0 : static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p,
689 : struct psmouse *psmouse)
690 : {
691 0 : u64 palm_data = 0;
692 0 : struct alps_data *priv = psmouse->private;
693 :
694 0 : f->first_mp = !!(p[0] & 0x02);
695 0 : f->is_mp = !!(p[0] & 0x20);
696 :
697 0 : if (!f->is_mp) {
698 0 : f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7));
699 0 : f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3));
700 0 : f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f;
701 0 : alps_decode_buttons_v3(f, p);
702 : } else {
703 0 : f->fingers = ((p[0] & 0x6) >> 1 |
704 0 : (p[0] & 0x10) >> 2);
705 :
706 0 : palm_data = (p[1] & 0x7f) |
707 0 : ((p[2] & 0x7f) << 7) |
708 0 : ((p[4] & 0x7f) << 14) |
709 0 : ((p[5] & 0x7f) << 21) |
710 0 : ((p[3] & 0x07) << 28) |
711 0 : (((u64)p[3] & 0x70) << 27) |
712 0 : (((u64)p[0] & 0x01) << 34);
713 :
714 : /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */
715 0 : 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 0 : f->x_map = (palm_data >> priv->y_bits) &
719 0 : (BIT(priv->x_bits) - 1);
720 : }
721 :
722 0 : return 0;
723 : }
724 :
725 0 : static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse)
726 : {
727 0 : struct alps_data *priv = psmouse->private;
728 0 : unsigned char *packet = psmouse->packet;
729 0 : struct input_dev *dev2 = priv->dev2;
730 0 : struct alps_fields *f = &priv->f;
731 0 : int fingers = 0;
732 :
733 0 : memset(f, 0, sizeof(*f));
734 :
735 0 : 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 0 : 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 0 : if (f->is_mp) {
751 0 : fingers = f->fingers;
752 : /*
753 : * Bitmap processing uses position packet's coordinate
754 : * data, so we need to do decode it first.
755 : */
756 0 : priv->decode_fields(f, priv->multi_data, psmouse);
757 0 : if (alps_process_bitmap(priv, f) == 0)
758 0 : fingers = 0; /* Use st data */
759 : } else {
760 0 : 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 0 : if (f->is_mp)
773 : return;
774 :
775 0 : if (!priv->multi_packet && f->first_mp) {
776 0 : priv->multi_packet = 1;
777 0 : memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
778 0 : return;
779 : }
780 :
781 0 : 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 0 : if (f->st.x && f->st.y && !f->pressure)
790 : return;
791 :
792 0 : alps_report_semi_mt_data(psmouse, fingers);
793 :
794 0 : if ((priv->flags & ALPS_DUALPOINT) &&
795 0 : !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
796 0 : input_report_key(dev2, BTN_LEFT, f->ts_left);
797 0 : input_report_key(dev2, BTN_RIGHT, f->ts_right);
798 0 : input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
799 : input_sync(dev2);
800 : }
801 : }
802 :
803 0 : static void alps_process_packet_v3(struct psmouse *psmouse)
804 : {
805 0 : 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 0 : if (packet[5] == 0x3f) {
816 0 : alps_process_trackstick_packet_v3(psmouse);
817 0 : return;
818 : }
819 :
820 0 : alps_process_touchpad_packet_v3_v5(psmouse);
821 : }
822 :
823 0 : static void alps_process_packet_v6(struct psmouse *psmouse)
824 : {
825 0 : struct alps_data *priv = psmouse->private;
826 0 : unsigned char *packet = psmouse->packet;
827 0 : struct input_dev *dev = psmouse->dev;
828 0 : 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 0 : if (packet[5] == 0x7F) {
838 : /* It should be a DualPoint when received Trackpoint packet */
839 0 : if (!(priv->flags & ALPS_DUALPOINT)) {
840 0 : psmouse_warn(psmouse,
841 : "Rejected trackstick packet from non DualPoint device");
842 0 : return;
843 : }
844 :
845 : /* Trackpoint packet */
846 0 : x = packet[1] | ((packet[3] & 0x20) << 2);
847 0 : y = packet[2] | ((packet[3] & 0x40) << 1);
848 0 : z = packet[4];
849 :
850 : /* To prevent the cursor jump when finger lifted */
851 0 : if (x == 0x7F && y == 0x7F && z == 0x7F)
852 0 : x = y = z = 0;
853 :
854 : /* Divide 4 since trackpoint's speed is too fast */
855 0 : input_report_rel(dev2, REL_X, (char)x / 4);
856 0 : input_report_rel(dev2, REL_Y, -((char)y / 4));
857 :
858 0 : psmouse_report_standard_buttons(dev2, packet[3]);
859 :
860 : input_sync(dev2);
861 : return;
862 : }
863 :
864 : /* Touchpad packet */
865 0 : x = packet[1] | ((packet[3] & 0x78) << 4);
866 0 : y = packet[2] | ((packet[4] & 0x78) << 4);
867 0 : z = packet[5];
868 :
869 0 : if (z > 30)
870 : input_report_key(dev, BTN_TOUCH, 1);
871 0 : if (z < 25)
872 : input_report_key(dev, BTN_TOUCH, 0);
873 :
874 0 : if (z > 0) {
875 0 : input_report_abs(dev, ABS_X, x);
876 : input_report_abs(dev, ABS_Y, y);
877 : }
878 :
879 0 : input_report_abs(dev, ABS_PRESSURE, z);
880 0 : input_report_key(dev, BTN_TOOL_FINGER, z > 0);
881 :
882 : /* v6 touchpad does not have middle button */
883 0 : packet[3] &= ~BIT(2);
884 0 : psmouse_report_standard_buttons(dev2, packet[3]);
885 :
886 : input_sync(dev);
887 : }
888 :
889 0 : static void alps_process_packet_v4(struct psmouse *psmouse)
890 : {
891 0 : struct alps_data *priv = psmouse->private;
892 0 : unsigned char *packet = psmouse->packet;
893 0 : 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 0 : if (packet[6] & 0x40) {
902 : /* sync, reset position */
903 0 : priv->multi_packet = 0;
904 : }
905 :
906 0 : if (WARN_ON_ONCE(priv->multi_packet > 2))
907 : return;
908 :
909 0 : offset = 2 * priv->multi_packet;
910 0 : priv->multi_data[offset] = packet[6];
911 0 : priv->multi_data[offset + 1] = packet[7];
912 :
913 0 : f->left = !!(packet[4] & 0x01);
914 0 : f->right = !!(packet[4] & 0x02);
915 :
916 0 : f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
917 0 : ((packet[0] & 0x30) >> 4);
918 0 : f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
919 0 : f->pressure = packet[5] & 0x7f;
920 :
921 0 : if (++priv->multi_packet > 2) {
922 0 : priv->multi_packet = 0;
923 :
924 0 : f->x_map = ((priv->multi_data[2] & 0x1f) << 10) |
925 0 : ((priv->multi_data[3] & 0x60) << 3) |
926 0 : ((priv->multi_data[0] & 0x3f) << 2) |
927 0 : ((priv->multi_data[1] & 0x60) >> 5);
928 0 : f->y_map = ((priv->multi_data[5] & 0x01) << 10) |
929 0 : ((priv->multi_data[3] & 0x1f) << 5) |
930 0 : (priv->multi_data[1] & 0x1f);
931 :
932 0 : f->fingers = alps_process_bitmap(priv, f);
933 : }
934 :
935 0 : alps_report_semi_mt_data(psmouse, f->fingers);
936 : }
937 :
938 : static bool alps_is_valid_package_v7(struct psmouse *psmouse)
939 : {
940 0 : switch (psmouse->pktcnt) {
941 : case 3:
942 0 : return (psmouse->packet[2] & 0x40) == 0x40;
943 : case 4:
944 0 : return (psmouse->packet[3] & 0x48) == 0x48;
945 : case 6:
946 0 : return (psmouse->packet[5] & 0x40) == 0x00;
947 : }
948 : return true;
949 : }
950 :
951 0 : static unsigned char alps_get_packet_id_v7(char *byte)
952 : {
953 : unsigned char packet_id;
954 :
955 0 : if (byte[4] & 0x40)
956 : packet_id = V7_PACKET_ID_TWO;
957 0 : else if (byte[4] & 0x01)
958 : packet_id = V7_PACKET_ID_MULTI;
959 0 : else if ((byte[0] & 0x10) && !(byte[4] & 0x43))
960 : packet_id = V7_PACKET_ID_NEW;
961 0 : else if (byte[1] == 0x00 && byte[4] == 0x00)
962 : packet_id = V7_PACKET_ID_IDLE;
963 : else
964 0 : packet_id = V7_PACKET_ID_UNKNOWN;
965 :
966 0 : return packet_id;
967 : }
968 :
969 0 : static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt,
970 : unsigned char *pkt,
971 : unsigned char pkt_id)
972 : {
973 0 : mt[0].x = ((pkt[2] & 0x80) << 4);
974 0 : mt[0].x |= ((pkt[2] & 0x3F) << 5);
975 0 : mt[0].x |= ((pkt[3] & 0x30) >> 1);
976 0 : mt[0].x |= (pkt[3] & 0x07);
977 0 : mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07);
978 :
979 0 : mt[1].x = ((pkt[3] & 0x80) << 4);
980 0 : mt[1].x |= ((pkt[4] & 0x80) << 3);
981 0 : mt[1].x |= ((pkt[4] & 0x3F) << 4);
982 0 : mt[1].y = ((pkt[5] & 0x80) << 3);
983 0 : mt[1].y |= ((pkt[5] & 0x3F) << 4);
984 :
985 0 : switch (pkt_id) {
986 : case V7_PACKET_ID_TWO:
987 0 : mt[1].x &= ~0x000F;
988 0 : mt[1].y |= 0x000F;
989 : /* Detect false-positive touches where x & y report max value */
990 0 : if (mt[1].y == 0x7ff && mt[1].x == 0xff0) {
991 0 : 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 0 : mt[1].x &= ~0x003F;
998 0 : mt[1].y &= ~0x0020;
999 0 : mt[1].y |= ((pkt[4] & 0x02) << 4);
1000 0 : mt[1].y |= 0x001F;
1001 0 : break;
1002 :
1003 : case V7_PACKET_ID_NEW:
1004 0 : mt[1].x &= ~0x003F;
1005 0 : mt[1].x |= (pkt[0] & 0x20);
1006 0 : mt[1].y |= 0x000F;
1007 0 : break;
1008 : }
1009 :
1010 0 : mt[0].y = 0x7FF - mt[0].y;
1011 0 : mt[1].y = 0x7FF - mt[1].y;
1012 0 : }
1013 :
1014 : static int alps_get_mt_count(struct input_mt_pos *mt)
1015 : {
1016 0 : int i, fingers = 0;
1017 :
1018 0 : for (i = 0; i < MAX_TOUCHES; i++) {
1019 0 : if (mt[i].x != 0 || mt[i].y != 0)
1020 0 : fingers++;
1021 : }
1022 :
1023 : return fingers;
1024 : }
1025 :
1026 0 : static int alps_decode_packet_v7(struct alps_fields *f,
1027 : unsigned char *p,
1028 : struct psmouse *psmouse)
1029 : {
1030 0 : struct alps_data *priv = psmouse->private;
1031 : unsigned char pkt_id;
1032 :
1033 0 : pkt_id = alps_get_packet_id_v7(p);
1034 0 : if (pkt_id == V7_PACKET_ID_IDLE)
1035 : return 0;
1036 0 : 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 0 : if (pkt_id == V7_PACKET_ID_NEW)
1057 : return 1;
1058 :
1059 0 : alps_get_finger_coordinate_v7(f->mt, p, pkt_id);
1060 :
1061 0 : if (pkt_id == V7_PACKET_ID_TWO)
1062 0 : f->fingers = alps_get_mt_count(f->mt);
1063 : else /* pkt_id == V7_PACKET_ID_MULTI */
1064 0 : f->fingers = 3 + (p[5] & 0x03);
1065 :
1066 0 : f->left = (p[0] & 0x80) >> 7;
1067 0 : if (priv->flags & ALPS_BUTTONPAD) {
1068 0 : if (p[0] & 0x20)
1069 0 : f->fingers++;
1070 0 : if (p[0] & 0x10)
1071 0 : f->fingers++;
1072 : } else {
1073 0 : f->right = (p[0] & 0x20) >> 5;
1074 0 : f->middle = (p[0] & 0x10) >> 4;
1075 : }
1076 :
1077 : /* Sometimes a single touch is reported in mt[1] rather then mt[0] */
1078 0 : if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) {
1079 0 : f->mt[0].x = f->mt[1].x;
1080 0 : f->mt[0].y = f->mt[1].y;
1081 0 : f->mt[1].x = 0;
1082 0 : f->mt[1].y = 0;
1083 : }
1084 :
1085 : return 0;
1086 : }
1087 :
1088 0 : static void alps_process_trackstick_packet_v7(struct psmouse *psmouse)
1089 : {
1090 0 : struct alps_data *priv = psmouse->private;
1091 0 : unsigned char *packet = psmouse->packet;
1092 0 : struct input_dev *dev2 = priv->dev2;
1093 : int x, y, z;
1094 :
1095 : /* It should be a DualPoint when received trackstick packet */
1096 0 : if (!(priv->flags & ALPS_DUALPOINT)) {
1097 0 : psmouse_warn(psmouse,
1098 : "Rejected trackstick packet from non DualPoint device");
1099 0 : return;
1100 : }
1101 :
1102 0 : x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2);
1103 0 : y = (packet[3] & 0x07) | (packet[4] & 0xb8) |
1104 0 : ((packet[3] & 0x20) << 1);
1105 0 : z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1);
1106 :
1107 0 : input_report_rel(dev2, REL_X, (char)x);
1108 0 : input_report_rel(dev2, REL_Y, -((char)y));
1109 0 : input_report_abs(dev2, ABS_PRESSURE, z);
1110 :
1111 0 : psmouse_report_standard_buttons(dev2, packet[1]);
1112 :
1113 : input_sync(dev2);
1114 : }
1115 :
1116 0 : static void alps_process_touchpad_packet_v7(struct psmouse *psmouse)
1117 : {
1118 0 : struct alps_data *priv = psmouse->private;
1119 0 : struct input_dev *dev = psmouse->dev;
1120 0 : struct alps_fields *f = &priv->f;
1121 :
1122 0 : memset(f, 0, sizeof(*f));
1123 :
1124 0 : if (priv->decode_fields(f, psmouse->packet, psmouse))
1125 : return;
1126 :
1127 0 : alps_report_mt_data(psmouse, alps_get_mt_count(f->mt));
1128 :
1129 0 : input_mt_report_finger_count(dev, f->fingers);
1130 :
1131 0 : input_report_key(dev, BTN_LEFT, f->left);
1132 0 : input_report_key(dev, BTN_RIGHT, f->right);
1133 0 : input_report_key(dev, BTN_MIDDLE, f->middle);
1134 :
1135 : input_sync(dev);
1136 : }
1137 :
1138 0 : static void alps_process_packet_v7(struct psmouse *psmouse)
1139 : {
1140 0 : unsigned char *packet = psmouse->packet;
1141 :
1142 0 : if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06)
1143 0 : alps_process_trackstick_packet_v7(psmouse);
1144 : else
1145 0 : alps_process_touchpad_packet_v7(psmouse);
1146 0 : }
1147 :
1148 0 : static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte)
1149 : {
1150 0 : enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE;
1151 :
1152 0 : switch (byte[3] & 0x30) {
1153 : case 0x00:
1154 0 : if (SS4_IS_IDLE_V2(byte)) {
1155 : pkt_id = SS4_PACKET_ID_IDLE;
1156 : } else {
1157 0 : pkt_id = SS4_PACKET_ID_ONE;
1158 : }
1159 : break;
1160 : case 0x10:
1161 : /* two-finger finger positions */
1162 0 : pkt_id = SS4_PACKET_ID_TWO;
1163 0 : break;
1164 : case 0x20:
1165 : /* stick pointer */
1166 0 : pkt_id = SS4_PACKET_ID_STICK;
1167 0 : break;
1168 : case 0x30:
1169 : /* third and fourth finger positions */
1170 0 : pkt_id = SS4_PACKET_ID_MULTI;
1171 0 : break;
1172 : }
1173 :
1174 0 : return pkt_id;
1175 : }
1176 :
1177 0 : static int alps_decode_ss4_v2(struct alps_fields *f,
1178 : unsigned char *p, struct psmouse *psmouse)
1179 : {
1180 0 : struct alps_data *priv = psmouse->private;
1181 : enum SS4_PACKET_ID pkt_id;
1182 : unsigned int no_data_x, no_data_y;
1183 :
1184 0 : pkt_id = alps_get_pkt_id_ss4_v2(p);
1185 :
1186 : /* Current packet is 1Finger coordinate packet */
1187 0 : switch (pkt_id) {
1188 : case SS4_PACKET_ID_ONE:
1189 0 : f->mt[0].x = SS4_1F_X_V2(p);
1190 0 : f->mt[0].y = SS4_1F_Y_V2(p);
1191 0 : 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 0 : f->fingers = f->pressure > 0 ? 1 : 0;
1199 0 : f->first_mp = 0;
1200 0 : f->is_mp = 0;
1201 0 : break;
1202 :
1203 : case SS4_PACKET_ID_TWO:
1204 0 : if (priv->flags & ALPS_BUTTONPAD) {
1205 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
1206 0 : f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1207 0 : f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1208 : } else {
1209 0 : f->mt[0].x = SS4_BTL_MF_X_V2(p, 0);
1210 0 : f->mt[1].x = SS4_BTL_MF_X_V2(p, 1);
1211 : }
1212 0 : f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0);
1213 0 : f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1);
1214 : } else {
1215 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
1216 0 : f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1217 0 : f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1218 : } else {
1219 0 : f->mt[0].x = SS4_STD_MF_X_V2(p, 0);
1220 0 : f->mt[1].x = SS4_STD_MF_X_V2(p, 1);
1221 : }
1222 0 : f->mt[0].y = SS4_STD_MF_Y_V2(p, 0);
1223 0 : f->mt[1].y = SS4_STD_MF_Y_V2(p, 1);
1224 : }
1225 0 : f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0;
1226 :
1227 0 : if (SS4_IS_MF_CONTINUE(p)) {
1228 0 : f->first_mp = 1;
1229 : } else {
1230 0 : f->fingers = 2;
1231 0 : f->first_mp = 0;
1232 : }
1233 0 : f->is_mp = 0;
1234 :
1235 0 : break;
1236 :
1237 : case SS4_PACKET_ID_MULTI:
1238 0 : if (priv->flags & ALPS_BUTTONPAD) {
1239 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
1240 0 : f->mt[2].x = SS4_PLUS_BTL_MF_X_V2(p, 0);
1241 0 : f->mt[3].x = SS4_PLUS_BTL_MF_X_V2(p, 1);
1242 0 : no_data_x = SS4_PLUS_MFPACKET_NO_AX_BL;
1243 : } else {
1244 0 : f->mt[2].x = SS4_BTL_MF_X_V2(p, 0);
1245 0 : f->mt[3].x = SS4_BTL_MF_X_V2(p, 1);
1246 0 : no_data_x = SS4_MFPACKET_NO_AX_BL;
1247 : }
1248 0 : no_data_y = SS4_MFPACKET_NO_AY_BL;
1249 :
1250 0 : f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0);
1251 0 : f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1);
1252 : } else {
1253 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
1254 0 : f->mt[2].x = SS4_PLUS_STD_MF_X_V2(p, 0);
1255 0 : f->mt[3].x = SS4_PLUS_STD_MF_X_V2(p, 1);
1256 0 : no_data_x = SS4_PLUS_MFPACKET_NO_AX;
1257 : } else {
1258 0 : f->mt[2].x = SS4_STD_MF_X_V2(p, 0);
1259 0 : f->mt[3].x = SS4_STD_MF_X_V2(p, 1);
1260 0 : no_data_x = SS4_MFPACKET_NO_AX;
1261 : }
1262 0 : no_data_y = SS4_MFPACKET_NO_AY;
1263 :
1264 0 : f->mt[2].y = SS4_STD_MF_Y_V2(p, 0);
1265 0 : f->mt[3].y = SS4_STD_MF_Y_V2(p, 1);
1266 : }
1267 :
1268 0 : f->first_mp = 0;
1269 0 : f->is_mp = 1;
1270 :
1271 0 : if (SS4_IS_5F_DETECTED(p)) {
1272 0 : f->fingers = 5;
1273 0 : } else if (f->mt[3].x == no_data_x &&
1274 0 : f->mt[3].y == no_data_y) {
1275 0 : f->mt[3].x = 0;
1276 0 : f->mt[3].y = 0;
1277 0 : f->fingers = 3;
1278 : } else {
1279 0 : 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 0 : f->first_mp = 0;
1289 0 : f->is_mp = 0;
1290 0 : break;
1291 :
1292 : case SS4_PACKET_ID_IDLE:
1293 : default:
1294 0 : memset(f, 0, sizeof(struct alps_fields));
1295 0 : break;
1296 : }
1297 :
1298 : /* handle buttons */
1299 0 : if (pkt_id == SS4_PACKET_ID_STICK) {
1300 0 : f->ts_left = !!(SS4_BTN_V2(p) & 0x01);
1301 0 : f->ts_right = !!(SS4_BTN_V2(p) & 0x02);
1302 0 : f->ts_middle = !!(SS4_BTN_V2(p) & 0x04);
1303 : } else {
1304 0 : f->left = !!(SS4_BTN_V2(p) & 0x01);
1305 0 : if (!(priv->flags & ALPS_BUTTONPAD)) {
1306 0 : f->right = !!(SS4_BTN_V2(p) & 0x02);
1307 0 : f->middle = !!(SS4_BTN_V2(p) & 0x04);
1308 : }
1309 : }
1310 :
1311 0 : return 0;
1312 : }
1313 :
1314 0 : static void alps_process_packet_ss4_v2(struct psmouse *psmouse)
1315 : {
1316 0 : struct alps_data *priv = psmouse->private;
1317 0 : unsigned char *packet = psmouse->packet;
1318 0 : struct input_dev *dev = psmouse->dev;
1319 0 : struct input_dev *dev2 = priv->dev2;
1320 0 : struct alps_fields *f = &priv->f;
1321 :
1322 0 : memset(f, 0, sizeof(struct alps_fields));
1323 0 : priv->decode_fields(f, packet, psmouse);
1324 0 : 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 0 : if (f->is_mp) {
1332 : /* Now process the 1st packet */
1333 0 : priv->decode_fields(f, priv->multi_data, psmouse);
1334 : } else {
1335 0 : 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 0 : if (f->is_mp)
1344 : return;
1345 :
1346 : /* Save the first packet */
1347 0 : if (!priv->multi_packet && f->first_mp) {
1348 0 : priv->multi_packet = 1;
1349 0 : memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
1350 0 : return;
1351 : }
1352 :
1353 0 : priv->multi_packet = 0;
1354 :
1355 : /* Report trackstick */
1356 0 : if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) {
1357 0 : if (!(priv->flags & ALPS_DUALPOINT)) {
1358 0 : psmouse_warn(psmouse,
1359 : "Rejected trackstick packet from non DualPoint device");
1360 0 : return;
1361 : }
1362 :
1363 0 : input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet));
1364 0 : input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet));
1365 0 : input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet));
1366 :
1367 0 : input_report_key(dev2, BTN_LEFT, f->ts_left);
1368 0 : input_report_key(dev2, BTN_RIGHT, f->ts_right);
1369 0 : input_report_key(dev2, BTN_MIDDLE, f->ts_middle);
1370 :
1371 : input_sync(dev2);
1372 : return;
1373 : }
1374 :
1375 : /* Report touchpad */
1376 0 : alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4);
1377 :
1378 0 : input_mt_report_finger_count(dev, f->fingers);
1379 :
1380 0 : input_report_key(dev, BTN_LEFT, f->left);
1381 0 : input_report_key(dev, BTN_RIGHT, f->right);
1382 0 : input_report_key(dev, BTN_MIDDLE, f->middle);
1383 :
1384 0 : input_report_abs(dev, ABS_PRESSURE, f->pressure);
1385 : input_sync(dev);
1386 : }
1387 :
1388 : static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse)
1389 : {
1390 0 : if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08))
1391 : return false;
1392 0 : if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0))
1393 : return false;
1394 : return true;
1395 : }
1396 :
1397 : static DEFINE_MUTEX(alps_mutex);
1398 :
1399 0 : static void alps_register_bare_ps2_mouse(struct work_struct *work)
1400 : {
1401 0 : struct alps_data *priv =
1402 0 : container_of(work, struct alps_data, dev3_register_work.work);
1403 0 : struct psmouse *psmouse = priv->psmouse;
1404 : struct input_dev *dev3;
1405 0 : int error = 0;
1406 :
1407 0 : mutex_lock(&alps_mutex);
1408 :
1409 0 : if (priv->dev3)
1410 : goto out;
1411 :
1412 0 : dev3 = input_allocate_device();
1413 0 : if (!dev3) {
1414 0 : psmouse_err(psmouse, "failed to allocate secondary device\n");
1415 0 : error = -ENOMEM;
1416 0 : goto out;
1417 : }
1418 :
1419 0 : snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s",
1420 0 : psmouse->ps2dev.serio->phys,
1421 0 : (priv->dev2 ? "input2" : "input1"));
1422 0 : 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 0 : dev3->name = "PS/2 ALPS Mouse";
1429 :
1430 0 : dev3->id.bustype = BUS_I8042;
1431 0 : dev3->id.vendor = 0x0002;
1432 0 : dev3->id.product = PSMOUSE_PS2;
1433 0 : dev3->id.version = 0x0000;
1434 0 : dev3->dev.parent = &psmouse->ps2dev.serio->dev;
1435 :
1436 0 : input_set_capability(dev3, EV_REL, REL_X);
1437 0 : input_set_capability(dev3, EV_REL, REL_Y);
1438 0 : input_set_capability(dev3, EV_KEY, BTN_LEFT);
1439 0 : input_set_capability(dev3, EV_KEY, BTN_RIGHT);
1440 0 : input_set_capability(dev3, EV_KEY, BTN_MIDDLE);
1441 :
1442 0 : __set_bit(INPUT_PROP_POINTER, dev3->propbit);
1443 :
1444 0 : error = input_register_device(dev3);
1445 0 : if (error) {
1446 0 : psmouse_err(psmouse,
1447 : "failed to register secondary device: %d\n",
1448 : error);
1449 0 : input_free_device(dev3);
1450 0 : goto out;
1451 : }
1452 :
1453 0 : 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 0 : if (error)
1461 0 : priv->dev3 = ERR_PTR(error);
1462 :
1463 0 : mutex_unlock(&alps_mutex);
1464 0 : }
1465 :
1466 0 : static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
1467 : unsigned char packet[],
1468 : bool report_buttons)
1469 : {
1470 0 : struct alps_data *priv = psmouse->private;
1471 0 : struct input_dev *dev, *dev2 = NULL;
1472 :
1473 : /* Figure out which device to use to report the bare packet */
1474 0 : if (priv->proto_version == ALPS_PROTO_V2 &&
1475 0 : (priv->flags & ALPS_DUALPOINT)) {
1476 : /* On V2 devices the DualPoint Stick reports bare packets */
1477 0 : dev = priv->dev2;
1478 0 : dev2 = psmouse->dev;
1479 0 : } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) {
1480 : /* Register dev3 mouse if we received PS/2 packet first time */
1481 0 : if (!IS_ERR(priv->dev3))
1482 0 : psmouse_queue_work(psmouse, &priv->dev3_register_work,
1483 : 0);
1484 : return;
1485 : } else {
1486 : dev = priv->dev3;
1487 : }
1488 :
1489 0 : if (report_buttons)
1490 0 : alps_report_buttons(dev, dev2,
1491 0 : packet[0] & 1, packet[0] & 2, packet[0] & 4);
1492 :
1493 0 : psmouse_report_standard_motion(dev, packet);
1494 :
1495 : input_sync(dev);
1496 : }
1497 :
1498 0 : static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
1499 : {
1500 0 : struct alps_data *priv = psmouse->private;
1501 :
1502 0 : if (psmouse->pktcnt < 6)
1503 : return PSMOUSE_GOOD_DATA;
1504 :
1505 0 : 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 0 : mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
1513 0 : return PSMOUSE_GOOD_DATA;
1514 : }
1515 :
1516 0 : del_timer(&priv->timer);
1517 :
1518 0 : 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 0 : if (((psmouse->packet[3] |
1527 0 : psmouse->packet[4] |
1528 0 : psmouse->packet[5]) & 0x80) ||
1529 0 : (!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 0 : priv->process_packet(psmouse);
1537 :
1538 : /* Continue with the next packet */
1539 0 : psmouse->packet[0] = psmouse->packet[6];
1540 0 : 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 0 : 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 0 : psmouse->packet[3] = psmouse->packet[6] & 0xf7;
1571 0 : psmouse->pktcnt = 4;
1572 : }
1573 :
1574 : return PSMOUSE_GOOD_DATA;
1575 : }
1576 :
1577 0 : static void alps_flush_packet(struct timer_list *t)
1578 : {
1579 0 : struct alps_data *priv = from_timer(priv, t, timer);
1580 0 : struct psmouse *psmouse = priv->psmouse;
1581 :
1582 0 : serio_pause_rx(psmouse->ps2dev.serio);
1583 :
1584 0 : 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 0 : if ((psmouse->packet[3] |
1592 0 : psmouse->packet[4] |
1593 0 : psmouse->packet[5]) & 0x80) {
1594 : psmouse_dbg(psmouse,
1595 : "refusing packet %3ph (suspected interleaved ps/2)\n",
1596 : psmouse->packet + 3);
1597 : } else {
1598 0 : priv->process_packet(psmouse);
1599 : }
1600 0 : psmouse->pktcnt = 0;
1601 : }
1602 :
1603 0 : serio_continue_rx(psmouse->ps2dev.serio);
1604 0 : }
1605 :
1606 0 : static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
1607 : {
1608 0 : 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 0 : if (priv->proto_version != ALPS_PROTO_V8 &&
1618 0 : !psmouse->out_of_sync_cnt &&
1619 0 : (psmouse->packet[0] & 0xc8) == 0x08) {
1620 :
1621 0 : if (psmouse->pktcnt == 3) {
1622 0 : alps_report_bare_ps2_packet(psmouse, psmouse->packet,
1623 : true);
1624 0 : 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 0 : if ((priv->flags & ALPS_PS2_INTERLEAVED) &&
1632 0 : psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
1633 0 : return alps_handle_interleaved_ps2(psmouse);
1634 : }
1635 :
1636 0 : 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 0 : if (priv->proto_version < ALPS_PROTO_V5 &&
1645 0 : psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
1646 0 : (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 0 : 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 0 : return PSMOUSE_BAD_DATA;
1666 : }
1667 :
1668 0 : if ((priv->proto_version == ALPS_PROTO_V7 &&
1669 0 : !alps_is_valid_package_v7(psmouse)) ||
1670 0 : (priv->proto_version == ALPS_PROTO_V8 &&
1671 0 : !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 0 : if (psmouse->pktcnt == psmouse->pktsize) {
1679 0 : priv->process_packet(psmouse);
1680 0 : return PSMOUSE_FULL_PACKET;
1681 : }
1682 :
1683 : return PSMOUSE_GOOD_DATA;
1684 : }
1685 :
1686 0 : static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
1687 : {
1688 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1689 0 : struct alps_data *priv = psmouse->private;
1690 : int command;
1691 : unsigned char *param;
1692 : unsigned char dummy[4];
1693 :
1694 0 : BUG_ON(nibble > 0xf);
1695 :
1696 0 : command = priv->nibble_commands[nibble].command;
1697 0 : param = (command & 0x0f00) ?
1698 0 : dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
1699 :
1700 0 : if (ps2_command(ps2dev, param, command))
1701 : return -1;
1702 :
1703 0 : return 0;
1704 : }
1705 :
1706 0 : static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
1707 : {
1708 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1709 0 : struct alps_data *priv = psmouse->private;
1710 : int i, nibble;
1711 :
1712 0 : if (ps2_command(ps2dev, NULL, priv->addr_command))
1713 : return -1;
1714 :
1715 0 : for (i = 12; i >= 0; i -= 4) {
1716 0 : nibble = (addr >> i) & 0xf;
1717 0 : if (alps_command_mode_send_nibble(psmouse, nibble))
1718 : return -1;
1719 : }
1720 :
1721 : return 0;
1722 : }
1723 :
1724 0 : static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1725 : {
1726 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1727 : unsigned char param[4];
1728 :
1729 0 : 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 0 : if (addr != ((param[0] << 8) | param[1]))
1738 : return -1;
1739 :
1740 0 : return param[2];
1741 : }
1742 :
1743 0 : static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
1744 : {
1745 0 : if (alps_command_mode_set_addr(psmouse, addr))
1746 : return -1;
1747 0 : return __alps_command_mode_read_reg(psmouse, addr);
1748 : }
1749 :
1750 0 : static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
1751 : {
1752 0 : if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
1753 : return -1;
1754 0 : if (alps_command_mode_send_nibble(psmouse, value & 0xf))
1755 : return -1;
1756 0 : return 0;
1757 : }
1758 :
1759 0 : static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
1760 : u8 value)
1761 : {
1762 0 : if (alps_command_mode_set_addr(psmouse, addr))
1763 : return -1;
1764 0 : return __alps_command_mode_write_reg(psmouse, value);
1765 : }
1766 :
1767 0 : static int alps_rpt_cmd(struct psmouse *psmouse, int init_command,
1768 : int repeated_command, unsigned char *param)
1769 : {
1770 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1771 :
1772 0 : param[0] = 0;
1773 0 : if (init_command && ps2_command(ps2dev, param, init_command))
1774 : return -EIO;
1775 :
1776 0 : if (ps2_command(ps2dev, NULL, repeated_command) ||
1777 0 : ps2_command(ps2dev, NULL, repeated_command) ||
1778 0 : ps2_command(ps2dev, NULL, repeated_command))
1779 : return -EIO;
1780 :
1781 0 : param[0] = param[1] = param[2] = 0xff;
1782 0 : 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 0 : return 0;
1788 : }
1789 :
1790 : static bool alps_check_valid_firmware_id(unsigned char id[])
1791 : {
1792 0 : if (id[0] == 0x73)
1793 : return true;
1794 :
1795 0 : if (id[0] == 0x88 &&
1796 0 : (id[1] == 0x07 ||
1797 0 : id[1] == 0x08 ||
1798 0 : (id[1] & 0xf0) == 0xb0 ||
1799 : (id[1] & 0xf0) == 0xc0)) {
1800 : return true;
1801 : }
1802 :
1803 : return false;
1804 : }
1805 :
1806 0 : static int alps_enter_command_mode(struct psmouse *psmouse)
1807 : {
1808 : unsigned char param[4];
1809 :
1810 0 : if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) {
1811 0 : psmouse_err(psmouse, "failed to enter command mode\n");
1812 0 : return -1;
1813 : }
1814 :
1815 0 : if (!alps_check_valid_firmware_id(param)) {
1816 : psmouse_dbg(psmouse,
1817 : "unknown response while entering command mode\n");
1818 : return -1;
1819 : }
1820 0 : return 0;
1821 : }
1822 :
1823 : static inline int alps_exit_command_mode(struct psmouse *psmouse)
1824 : {
1825 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1826 0 : 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 : */
1836 0 : static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1837 : {
1838 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1839 0 : int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1840 :
1841 0 : if (ps2_command(ps2dev, NULL, cmd) ||
1842 0 : ps2_command(ps2dev, NULL, cmd) ||
1843 0 : ps2_command(ps2dev, NULL, cmd) ||
1844 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1845 : return -1;
1846 :
1847 : /* we may get 3 more bytes, just ignore them */
1848 0 : ps2_drain(ps2dev, 3, 100);
1849 :
1850 0 : return 0;
1851 : }
1852 :
1853 0 : static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1854 : {
1855 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1856 :
1857 : /* Try ALPS magic knock - 4 disable before enable */
1858 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1859 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1860 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1861 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1862 0 : 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 0 : return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1870 : }
1871 :
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 0 : for (i = 0; i <= 8; i += 4) {
1881 0 : nibble = (word >> i) & 0xf;
1882 0 : if (alps_command_mode_send_nibble(psmouse, nibble))
1883 : return -1;
1884 : }
1885 :
1886 : return 0;
1887 : }
1888 :
1889 0 : static int alps_monitor_mode_write_reg(struct psmouse *psmouse,
1890 : u16 addr, u16 value)
1891 : {
1892 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1893 :
1894 : /* 0x0A0 is the command to write the word */
1895 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) ||
1896 0 : alps_monitor_mode_send_word(psmouse, 0x0A0) ||
1897 0 : alps_monitor_mode_send_word(psmouse, addr) ||
1898 0 : alps_monitor_mode_send_word(psmouse, value) ||
1899 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1900 : return -1;
1901 :
1902 : return 0;
1903 : }
1904 :
1905 0 : static int alps_monitor_mode(struct psmouse *psmouse, bool enable)
1906 : {
1907 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1908 :
1909 0 : if (enable) {
1910 : /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */
1911 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
1912 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) ||
1913 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1914 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1915 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1916 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1917 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1918 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO))
1919 : return -1;
1920 : } else {
1921 : /* EC to exit monitor mode */
1922 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP))
1923 : return -1;
1924 : }
1925 :
1926 : return 0;
1927 : }
1928 :
1929 0 : static int alps_absolute_mode_v6(struct psmouse *psmouse)
1930 : {
1931 0 : u16 reg_val = 0x181;
1932 : int ret;
1933 :
1934 : /* enter monitor mode, to write the register */
1935 0 : if (alps_monitor_mode(psmouse, true))
1936 : return -1;
1937 :
1938 0 : ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val);
1939 :
1940 0 : if (alps_monitor_mode(psmouse, false))
1941 0 : ret = -1;
1942 :
1943 : return ret;
1944 : }
1945 :
1946 : static int alps_get_status(struct psmouse *psmouse, char *param)
1947 : {
1948 : /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1949 0 : 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 : */
1964 0 : static int alps_tap_mode(struct psmouse *psmouse, int enable)
1965 : {
1966 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
1967 0 : int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1968 0 : unsigned char tap_arg = enable ? 0x0A : 0x00;
1969 : unsigned char param[4];
1970 :
1971 0 : if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1972 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1973 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1974 0 : ps2_command(ps2dev, &tap_arg, cmd))
1975 : return -1;
1976 :
1977 0 : if (alps_get_status(psmouse, param))
1978 : return -1;
1979 :
1980 0 : return 0;
1981 : }
1982 :
1983 : /*
1984 : * alps_poll() - poll the touchpad for current motion packet.
1985 : * Used in resync.
1986 : */
1987 0 : static int alps_poll(struct psmouse *psmouse)
1988 : {
1989 0 : struct alps_data *priv = psmouse->private;
1990 : unsigned char buf[sizeof(psmouse->packet)];
1991 : bool poll_failed;
1992 :
1993 0 : if (priv->flags & ALPS_PASS)
1994 0 : alps_passthrough_mode_v2(psmouse, true);
1995 :
1996 0 : poll_failed = ps2_command(&psmouse->ps2dev, buf,
1997 0 : PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1998 :
1999 0 : if (priv->flags & ALPS_PASS)
2000 0 : alps_passthrough_mode_v2(psmouse, false);
2001 :
2002 0 : if (poll_failed || (buf[0] & priv->mask0) != priv->byte0)
2003 : return -1;
2004 :
2005 0 : if ((psmouse->badbyte & 0xc8) == 0x08) {
2006 : /*
2007 : * Poll the track stick ...
2008 : */
2009 0 : if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
2010 : return -1;
2011 : }
2012 :
2013 0 : memcpy(psmouse->packet, buf, sizeof(buf));
2014 0 : return 0;
2015 : }
2016 :
2017 0 : static int alps_hw_init_v1_v2(struct psmouse *psmouse)
2018 : {
2019 0 : struct alps_data *priv = psmouse->private;
2020 :
2021 0 : if ((priv->flags & ALPS_PASS) &&
2022 0 : alps_passthrough_mode_v2(psmouse, true)) {
2023 : return -1;
2024 : }
2025 :
2026 0 : if (alps_tap_mode(psmouse, true)) {
2027 0 : psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
2028 0 : return -1;
2029 : }
2030 :
2031 0 : if (alps_absolute_mode_v1_v2(psmouse)) {
2032 0 : psmouse_err(psmouse, "Failed to enable absolute mode\n");
2033 0 : return -1;
2034 : }
2035 :
2036 0 : if ((priv->flags & ALPS_PASS) &&
2037 0 : alps_passthrough_mode_v2(psmouse, false)) {
2038 : return -1;
2039 : }
2040 :
2041 : /* ALPS needs stream mode, otherwise it won't report any data */
2042 0 : if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
2043 0 : psmouse_err(psmouse, "Failed to enable stream mode\n");
2044 0 : return -1;
2045 : }
2046 :
2047 : return 0;
2048 : }
2049 :
2050 : /* Must be in passthrough mode when calling this function */
2051 0 : static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse)
2052 : {
2053 0 : unsigned char param[2] = {0xC8, 0x14};
2054 :
2055 0 : if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2056 0 : ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2057 0 : ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
2058 0 : ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2059 0 : ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2060 : return -1;
2061 :
2062 : return 0;
2063 : }
2064 :
2065 0 : 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 0 : if (alps_passthrough_mode_v2(psmouse, true))
2071 : return -1;
2072 :
2073 0 : ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse);
2074 :
2075 0 : if (alps_passthrough_mode_v2(psmouse, false))
2076 : return -1;
2077 :
2078 0 : if (ret)
2079 : return ret;
2080 :
2081 0 : if (alps_absolute_mode_v6(psmouse)) {
2082 0 : psmouse_err(psmouse, "Failed to enable absolute mode\n");
2083 0 : return -1;
2084 : }
2085 :
2086 : return 0;
2087 : }
2088 :
2089 : /*
2090 : * Enable or disable passthrough mode to the trackstick.
2091 : */
2092 0 : static int alps_passthrough_mode_v3(struct psmouse *psmouse,
2093 : int reg_base, bool enable)
2094 : {
2095 0 : int reg_val, ret = -1;
2096 :
2097 0 : if (alps_enter_command_mode(psmouse))
2098 : return -1;
2099 :
2100 0 : reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008);
2101 0 : if (reg_val == -1)
2102 : goto error;
2103 :
2104 0 : if (enable)
2105 0 : reg_val |= 0x01;
2106 : else
2107 0 : reg_val &= ~0x01;
2108 :
2109 0 : ret = __alps_command_mode_write_reg(psmouse, reg_val);
2110 :
2111 : error:
2112 0 : if (alps_exit_command_mode(psmouse))
2113 0 : ret = -1;
2114 : return ret;
2115 : }
2116 :
2117 : /* Must be in command mode when calling this function */
2118 0 : static int alps_absolute_mode_v3(struct psmouse *psmouse)
2119 : {
2120 : int reg_val;
2121 :
2122 0 : reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2123 0 : if (reg_val == -1)
2124 : return -1;
2125 :
2126 0 : reg_val |= 0x06;
2127 0 : if (__alps_command_mode_write_reg(psmouse, reg_val))
2128 : return -1;
2129 :
2130 0 : return 0;
2131 : }
2132 :
2133 0 : static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base)
2134 : {
2135 0 : int ret = -EIO, reg_val;
2136 :
2137 0 : if (alps_enter_command_mode(psmouse))
2138 : goto error;
2139 :
2140 0 : reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2141 0 : if (reg_val == -1)
2142 : goto error;
2143 :
2144 : /* bit 7: trackstick is present */
2145 0 : ret = reg_val & 0x80 ? 0 : -ENODEV;
2146 :
2147 : error:
2148 0 : alps_exit_command_mode(psmouse);
2149 0 : return ret;
2150 : }
2151 :
2152 0 : static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base)
2153 : {
2154 0 : 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 0 : 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 0 : if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) {
2179 0 : psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n");
2180 0 : ret = -ENODEV;
2181 : } else {
2182 : psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param);
2183 0 : if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) {
2184 0 : psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n");
2185 0 : ret = -EIO;
2186 : }
2187 : }
2188 :
2189 0 : if (alps_passthrough_mode_v3(psmouse, reg_base, false))
2190 : return -EIO;
2191 :
2192 0 : if (ret)
2193 : return ret;
2194 :
2195 0 : if (alps_enter_command_mode(psmouse))
2196 : return -EIO;
2197 :
2198 0 : reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08);
2199 0 : 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 0 : reg_val |= BIT(1);
2207 0 : if (__alps_command_mode_write_reg(psmouse, reg_val))
2208 0 : ret = -EIO;
2209 : }
2210 :
2211 0 : if (alps_exit_command_mode(psmouse))
2212 : return -EIO;
2213 :
2214 0 : return ret;
2215 : }
2216 :
2217 0 : static int alps_hw_init_v3(struct psmouse *psmouse)
2218 : {
2219 0 : struct alps_data *priv = psmouse->private;
2220 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2221 : int reg_val;
2222 : unsigned char param[4];
2223 :
2224 0 : if ((priv->flags & ALPS_DUALPOINT) &&
2225 0 : alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO)
2226 : goto error;
2227 :
2228 0 : if (alps_enter_command_mode(psmouse) ||
2229 0 : alps_absolute_mode_v3(psmouse)) {
2230 0 : psmouse_err(psmouse, "Failed to enter absolute mode\n");
2231 0 : goto error;
2232 : }
2233 :
2234 0 : reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
2235 0 : if (reg_val == -1)
2236 : goto error;
2237 0 : if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2238 : goto error;
2239 :
2240 0 : reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
2241 0 : if (reg_val == -1)
2242 : goto error;
2243 0 : if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
2244 : goto error;
2245 :
2246 0 : if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
2247 : goto error;
2248 0 : if (__alps_command_mode_write_reg(psmouse, 0x04))
2249 : goto error;
2250 :
2251 0 : if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
2252 : goto error;
2253 0 : if (__alps_command_mode_write_reg(psmouse, 0x03))
2254 : goto error;
2255 :
2256 0 : if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
2257 : goto error;
2258 0 : if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
2259 : goto error;
2260 :
2261 0 : if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
2262 : goto error;
2263 0 : if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
2264 : goto error;
2265 :
2266 0 : alps_exit_command_mode(psmouse);
2267 :
2268 : /* Set rate and enable data reporting */
2269 0 : param[0] = 0x64;
2270 0 : if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2271 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2272 0 : psmouse_err(psmouse, "Failed to enable data reporting\n");
2273 0 : 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 :
2288 0 : 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 0 : struct alps_data *priv = psmouse->private;
2292 :
2293 0 : reg = alps_command_mode_read_reg(psmouse, reg_pitch);
2294 0 : if (reg < 0)
2295 : return reg;
2296 :
2297 0 : x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2298 0 : x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */
2299 :
2300 0 : y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */
2301 0 : y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */
2302 :
2303 0 : reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1);
2304 0 : if (reg < 0)
2305 : return reg;
2306 :
2307 0 : x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */
2308 0 : x_electrode = 17 + x_electrode;
2309 :
2310 0 : y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */
2311 0 : y_electrode = 13 + y_electrode;
2312 :
2313 0 : x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */
2314 0 : y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */
2315 :
2316 0 : priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2317 0 : 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 0 : return 0;
2325 : }
2326 :
2327 0 : static int alps_hw_init_rushmore_v3(struct psmouse *psmouse)
2328 : {
2329 0 : struct alps_data *priv = psmouse->private;
2330 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2331 0 : int reg_val, ret = -1;
2332 :
2333 0 : if (priv->flags & ALPS_DUALPOINT) {
2334 0 : reg_val = alps_setup_trackstick_v3(psmouse,
2335 : ALPS_REG_BASE_RUSHMORE);
2336 0 : if (reg_val == -EIO)
2337 : goto error;
2338 : }
2339 :
2340 0 : if (alps_enter_command_mode(psmouse) ||
2341 0 : alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 ||
2342 0 : alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00))
2343 : goto error;
2344 :
2345 0 : if (alps_get_v3_v7_resolution(psmouse, 0xc2da))
2346 : goto error;
2347 :
2348 0 : reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6);
2349 0 : if (reg_val == -1)
2350 : goto error;
2351 0 : if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd))
2352 : goto error;
2353 :
2354 0 : if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2355 : goto error;
2356 :
2357 : /* enter absolute mode */
2358 0 : reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2359 0 : if (reg_val == -1)
2360 : goto error;
2361 0 : if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2362 : goto error;
2363 :
2364 0 : alps_exit_command_mode(psmouse);
2365 0 : 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 */
2373 0 : static int alps_absolute_mode_v4(struct psmouse *psmouse)
2374 : {
2375 : int reg_val;
2376 :
2377 0 : reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
2378 0 : if (reg_val == -1)
2379 : return -1;
2380 :
2381 0 : reg_val |= 0x02;
2382 0 : if (__alps_command_mode_write_reg(psmouse, reg_val))
2383 : return -1;
2384 :
2385 0 : return 0;
2386 : }
2387 :
2388 0 : static int alps_hw_init_v4(struct psmouse *psmouse)
2389 : {
2390 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2391 : unsigned char param[4];
2392 :
2393 0 : if (alps_enter_command_mode(psmouse))
2394 : goto error;
2395 :
2396 0 : if (alps_absolute_mode_v4(psmouse)) {
2397 0 : psmouse_err(psmouse, "Failed to enter absolute mode\n");
2398 0 : goto error;
2399 : }
2400 :
2401 0 : if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
2402 : goto error;
2403 :
2404 0 : if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
2405 : goto error;
2406 :
2407 0 : if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
2408 : goto error;
2409 :
2410 0 : if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
2411 : goto error;
2412 :
2413 0 : if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
2414 : goto error;
2415 :
2416 0 : if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
2417 : goto error;
2418 :
2419 0 : if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
2420 : goto error;
2421 :
2422 0 : if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
2423 : goto error;
2424 :
2425 0 : 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 0 : param[0] = 0xc8;
2433 0 : param[1] = 0x64;
2434 0 : param[2] = 0x50;
2435 0 : if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2436 0 : ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) ||
2437 0 : ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) ||
2438 0 : ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
2439 : return -1;
2440 :
2441 : /* Set rate and enable data reporting */
2442 0 : param[0] = 0x64;
2443 0 : if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
2444 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
2445 0 : psmouse_err(psmouse, "Failed to enable data reporting\n");
2446 0 : 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 :
2461 0 : static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse,
2462 : unsigned char index, unsigned char otp[])
2463 : {
2464 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2465 :
2466 0 : switch (index) {
2467 : case 0:
2468 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2469 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2470 0 : ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2471 : return -1;
2472 :
2473 : break;
2474 :
2475 : case 1:
2476 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2477 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2478 0 : ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO))
2479 : return -1;
2480 :
2481 : break;
2482 : }
2483 :
2484 : return 0;
2485 : }
2486 :
2487 0 : 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 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
2495 0 : num_x_electrode =
2496 0 : SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F);
2497 0 : num_y_electrode =
2498 0 : SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F);
2499 :
2500 0 : priv->x_max =
2501 0 : (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2502 0 : priv->y_max =
2503 0 : (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE;
2504 :
2505 0 : x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2506 0 : y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM;
2507 :
2508 : } else {
2509 0 : num_x_electrode =
2510 0 : SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F);
2511 0 : num_y_electrode =
2512 0 : SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F);
2513 :
2514 0 : priv->x_max =
2515 0 : (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2516 0 : priv->y_max =
2517 0 : (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE;
2518 :
2519 0 : x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM;
2520 0 : y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM;
2521 : }
2522 :
2523 0 : x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */
2524 0 : y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */
2525 :
2526 0 : priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */
2527 0 : priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */
2528 :
2529 0 : return 0;
2530 : }
2531 :
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 0 : if (IS_SS4PLUS_DEV(priv->dev_id))
2538 0 : is_btnless = (otp[1][0] >> 1) & 0x01;
2539 : else
2540 0 : is_btnless = (otp[1][1] >> 3) & 0x01;
2541 :
2542 0 : if (is_btnless)
2543 0 : priv->flags |= ALPS_BUTTONPAD;
2544 :
2545 : return 0;
2546 : }
2547 :
2548 0 : static int alps_update_dual_info_ss4_v2(unsigned char otp[][4],
2549 : struct alps_data *priv,
2550 : struct psmouse *psmouse)
2551 : {
2552 0 : bool is_dual = false;
2553 0 : int reg_val = 0;
2554 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2555 :
2556 0 : if (IS_SS4PLUS_DEV(priv->dev_id)) {
2557 0 : is_dual = (otp[0][0] >> 4) & 0x01;
2558 :
2559 0 : if (!is_dual) {
2560 : /* For support TrackStick of Thinkpad L/E series */
2561 0 : if (alps_exit_command_mode(psmouse) == 0 &&
2562 0 : alps_enter_command_mode(psmouse) == 0) {
2563 0 : reg_val = alps_command_mode_read_reg(psmouse,
2564 : 0xD7);
2565 : }
2566 0 : alps_exit_command_mode(psmouse);
2567 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2568 :
2569 0 : if (reg_val == 0x0C || reg_val == 0x1D)
2570 0 : is_dual = true;
2571 : }
2572 : }
2573 :
2574 0 : if (is_dual)
2575 0 : priv->flags |= ALPS_DUALPOINT |
2576 : ALPS_DUALPOINT_WITH_PRESSURE;
2577 :
2578 0 : return 0;
2579 : }
2580 :
2581 0 : static int alps_set_defaults_ss4_v2(struct psmouse *psmouse,
2582 : struct alps_data *priv)
2583 : {
2584 : unsigned char otp[2][4];
2585 :
2586 0 : memset(otp, 0, sizeof(otp));
2587 :
2588 0 : if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) ||
2589 0 : alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]))
2590 : return -1;
2591 :
2592 0 : alps_update_device_area_ss4_v2(otp, priv);
2593 :
2594 0 : alps_update_btn_info_ss4_v2(otp, priv);
2595 :
2596 0 : alps_update_dual_info_ss4_v2(otp, priv, psmouse);
2597 :
2598 0 : return 0;
2599 : }
2600 :
2601 0 : static int alps_dolphin_get_device_area(struct psmouse *psmouse,
2602 : struct alps_data *priv)
2603 : {
2604 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2605 0 : unsigned char param[4] = {0};
2606 : int num_x_electrode, num_y_electrode;
2607 :
2608 0 : if (alps_enter_command_mode(psmouse))
2609 : return -1;
2610 :
2611 0 : param[0] = 0x0a;
2612 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
2613 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2614 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) ||
2615 0 : ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2616 0 : ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE))
2617 : return -1;
2618 :
2619 0 : 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 0 : num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F);
2635 0 : num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F);
2636 0 : priv->x_bits = num_x_electrode;
2637 0 : priv->y_bits = num_y_electrode;
2638 0 : priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2639 0 : priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE;
2640 :
2641 0 : if (alps_exit_command_mode(psmouse))
2642 : return -1;
2643 :
2644 0 : return 0;
2645 : }
2646 :
2647 0 : static int alps_hw_init_dolphin_v1(struct psmouse *psmouse)
2648 : {
2649 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2650 : unsigned char param[2];
2651 :
2652 : /* This is dolphin "v1" as empirically defined by florin9doi */
2653 0 : param[0] = 0x64;
2654 0 : param[1] = 0x28;
2655 :
2656 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2657 0 : ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2658 0 : ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE))
2659 : return -1;
2660 :
2661 : return 0;
2662 : }
2663 :
2664 0 : static int alps_hw_init_v7(struct psmouse *psmouse)
2665 : {
2666 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2667 0 : int reg_val, ret = -1;
2668 :
2669 0 : if (alps_enter_command_mode(psmouse) ||
2670 0 : alps_command_mode_read_reg(psmouse, 0xc2d9) == -1)
2671 : goto error;
2672 :
2673 0 : if (alps_get_v3_v7_resolution(psmouse, 0xc397))
2674 : goto error;
2675 :
2676 0 : if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64))
2677 : goto error;
2678 :
2679 0 : reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4);
2680 0 : if (reg_val == -1)
2681 : goto error;
2682 0 : if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02))
2683 : goto error;
2684 :
2685 0 : alps_exit_command_mode(psmouse);
2686 0 : return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2687 :
2688 : error:
2689 : alps_exit_command_mode(psmouse);
2690 : return ret;
2691 : }
2692 :
2693 0 : static int alps_hw_init_ss4_v2(struct psmouse *psmouse)
2694 : {
2695 0 : struct ps2dev *ps2dev = &psmouse->ps2dev;
2696 0 : char param[2] = {0x64, 0x28};
2697 0 : int ret = -1;
2698 :
2699 : /* enter absolute mode */
2700 0 : if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2701 0 : ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) ||
2702 0 : ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) ||
2703 0 : 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 0 : if (alps_exit_command_mode(psmouse) ||
2709 0 : alps_enter_command_mode(psmouse) ||
2710 0 : alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) {
2711 : goto error;
2712 : }
2713 0 : alps_exit_command_mode(psmouse);
2714 :
2715 0 : return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE);
2716 :
2717 : error:
2718 : alps_exit_command_mode(psmouse);
2719 : return ret;
2720 : }
2721 :
2722 0 : static int alps_set_protocol(struct psmouse *psmouse,
2723 : struct alps_data *priv,
2724 : const struct alps_protocol_info *protocol)
2725 : {
2726 0 : psmouse->private = priv;
2727 :
2728 0 : timer_setup(&priv->timer, alps_flush_packet, 0);
2729 :
2730 0 : priv->proto_version = protocol->version;
2731 0 : priv->byte0 = protocol->byte0;
2732 0 : priv->mask0 = protocol->mask0;
2733 0 : priv->flags = protocol->flags;
2734 :
2735 0 : priv->x_max = 2000;
2736 0 : priv->y_max = 1400;
2737 0 : priv->x_bits = 15;
2738 0 : priv->y_bits = 11;
2739 :
2740 0 : switch (priv->proto_version) {
2741 : case ALPS_PROTO_V1:
2742 : case ALPS_PROTO_V2:
2743 0 : priv->hw_init = alps_hw_init_v1_v2;
2744 0 : priv->process_packet = alps_process_packet_v1_v2;
2745 0 : priv->set_abs_params = alps_set_abs_params_st;
2746 0 : priv->x_max = 1023;
2747 0 : priv->y_max = 767;
2748 0 : 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 0 : priv->hw_init = alps_hw_init_v3;
2754 0 : priv->process_packet = alps_process_packet_v3;
2755 0 : priv->set_abs_params = alps_set_abs_params_semi_mt;
2756 0 : priv->decode_fields = alps_decode_pinnacle;
2757 0 : priv->nibble_commands = alps_v3_nibble_commands;
2758 0 : priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2759 :
2760 0 : if (alps_probe_trackstick_v3_v7(psmouse,
2761 : ALPS_REG_BASE_PINNACLE) < 0)
2762 0 : priv->flags &= ~ALPS_DUALPOINT;
2763 :
2764 : break;
2765 :
2766 : case ALPS_PROTO_V3_RUSHMORE:
2767 0 : priv->hw_init = alps_hw_init_rushmore_v3;
2768 0 : priv->process_packet = alps_process_packet_v3;
2769 0 : priv->set_abs_params = alps_set_abs_params_semi_mt;
2770 0 : priv->decode_fields = alps_decode_rushmore;
2771 0 : priv->nibble_commands = alps_v3_nibble_commands;
2772 0 : priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2773 0 : priv->x_bits = 16;
2774 0 : priv->y_bits = 12;
2775 :
2776 0 : if (alps_probe_trackstick_v3_v7(psmouse,
2777 : ALPS_REG_BASE_RUSHMORE) < 0)
2778 0 : priv->flags &= ~ALPS_DUALPOINT;
2779 :
2780 : break;
2781 :
2782 : case ALPS_PROTO_V4:
2783 0 : priv->hw_init = alps_hw_init_v4;
2784 0 : priv->process_packet = alps_process_packet_v4;
2785 0 : priv->set_abs_params = alps_set_abs_params_semi_mt;
2786 0 : priv->nibble_commands = alps_v4_nibble_commands;
2787 0 : priv->addr_command = PSMOUSE_CMD_DISABLE;
2788 0 : break;
2789 :
2790 : case ALPS_PROTO_V5:
2791 0 : priv->hw_init = alps_hw_init_dolphin_v1;
2792 0 : priv->process_packet = alps_process_touchpad_packet_v3_v5;
2793 0 : priv->decode_fields = alps_decode_dolphin;
2794 0 : priv->set_abs_params = alps_set_abs_params_semi_mt;
2795 0 : priv->nibble_commands = alps_v3_nibble_commands;
2796 0 : priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2797 0 : priv->x_bits = 23;
2798 0 : priv->y_bits = 12;
2799 :
2800 0 : if (alps_dolphin_get_device_area(psmouse, priv))
2801 : return -EIO;
2802 :
2803 : break;
2804 :
2805 : case ALPS_PROTO_V6:
2806 0 : priv->hw_init = alps_hw_init_v6;
2807 0 : priv->process_packet = alps_process_packet_v6;
2808 0 : priv->set_abs_params = alps_set_abs_params_st;
2809 0 : priv->nibble_commands = alps_v6_nibble_commands;
2810 0 : priv->x_max = 2047;
2811 0 : priv->y_max = 1535;
2812 0 : break;
2813 :
2814 : case ALPS_PROTO_V7:
2815 0 : priv->hw_init = alps_hw_init_v7;
2816 0 : priv->process_packet = alps_process_packet_v7;
2817 0 : priv->decode_fields = alps_decode_packet_v7;
2818 0 : priv->set_abs_params = alps_set_abs_params_v7;
2819 0 : priv->nibble_commands = alps_v3_nibble_commands;
2820 0 : priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2821 0 : priv->x_max = 0xfff;
2822 0 : priv->y_max = 0x7ff;
2823 :
2824 0 : if (priv->fw_ver[1] != 0xba)
2825 0 : priv->flags |= ALPS_BUTTONPAD;
2826 :
2827 0 : if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0)
2828 0 : priv->flags &= ~ALPS_DUALPOINT;
2829 :
2830 : break;
2831 :
2832 : case ALPS_PROTO_V8:
2833 0 : priv->hw_init = alps_hw_init_ss4_v2;
2834 0 : priv->process_packet = alps_process_packet_ss4_v2;
2835 0 : priv->decode_fields = alps_decode_ss4_v2;
2836 0 : priv->set_abs_params = alps_set_abs_params_ss4_v2;
2837 0 : priv->nibble_commands = alps_v3_nibble_commands;
2838 0 : priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
2839 :
2840 0 : if (alps_set_defaults_ss4_v2(psmouse, priv))
2841 : return -EIO;
2842 :
2843 : break;
2844 : }
2845 :
2846 : return 0;
2847 : }
2848 :
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 0 : for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
2856 0 : model = &alps_model_data[i];
2857 :
2858 0 : if (!memcmp(e7, model->signature, sizeof(model->signature)))
2859 0 : return &model->protocol_info;
2860 : }
2861 :
2862 : return NULL;
2863 : }
2864 :
2865 0 : static bool alps_is_cs19_trackpoint(struct psmouse *psmouse)
2866 : {
2867 0 : u8 param[2] = { 0 };
2868 :
2869 0 : 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 0 : return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20);
2880 : }
2881 :
2882 0 : 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 0 : if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2895 : PSMOUSE_CMD_SETSCALE11, e6))
2896 : return -EIO;
2897 :
2898 0 : 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 0 : if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2906 0 : PSMOUSE_CMD_SETSCALE21, e7) ||
2907 0 : alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES,
2908 0 : PSMOUSE_CMD_RESET_WRAP, ec) ||
2909 0 : alps_exit_command_mode(psmouse))
2910 : return -EIO;
2911 :
2912 0 : protocol = alps_match_table(e7, ec);
2913 0 : if (!protocol) {
2914 0 : if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 &&
2915 0 : ec[2] == 0x8a) {
2916 : protocol = &alps_v4_protocol_data;
2917 0 : } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 &&
2918 0 : ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) {
2919 : protocol = &alps_v5_protocol_data;
2920 0 : } else if (ec[0] == 0x88 &&
2921 0 : ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) {
2922 : protocol = &alps_v7_protocol_data;
2923 0 : } else if (ec[0] == 0x88 && ec[1] == 0x08) {
2924 : protocol = &alps_v3_rushmore_data;
2925 0 : } else if (ec[0] == 0x88 && ec[1] == 0x07 &&
2926 0 : ec[2] >= 0x90 && ec[2] <= 0x9d) {
2927 : protocol = &alps_v3_protocol_data;
2928 0 : } else if (e7[0] == 0x73 && e7[1] == 0x03 &&
2929 0 : (e7[2] == 0x14 || e7[2] == 0x28)) {
2930 : protocol = &alps_v8_protocol_data;
2931 0 : } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) {
2932 0 : protocol = &alps_v9_protocol_data;
2933 0 : psmouse_warn(psmouse,
2934 : "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n",
2935 : e7, ec);
2936 0 : 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 0 : if (priv) {
2945 : /* Save Device ID and Firmware version */
2946 0 : memcpy(priv->dev_id, e7, 3);
2947 0 : memcpy(priv->fw_ver, ec, 3);
2948 0 : error = alps_set_protocol(psmouse, priv, protocol);
2949 0 : if (error)
2950 : return error;
2951 : }
2952 :
2953 : return 0;
2954 : }
2955 :
2956 0 : static int alps_reconnect(struct psmouse *psmouse)
2957 : {
2958 0 : struct alps_data *priv = psmouse->private;
2959 :
2960 0 : psmouse_reset(psmouse);
2961 :
2962 0 : if (alps_identify(psmouse, priv) < 0)
2963 : return -1;
2964 :
2965 0 : return priv->hw_init(psmouse);
2966 : }
2967 :
2968 0 : static void alps_disconnect(struct psmouse *psmouse)
2969 : {
2970 0 : struct alps_data *priv = psmouse->private;
2971 :
2972 0 : psmouse_reset(psmouse);
2973 0 : timer_shutdown_sync(&priv->timer);
2974 0 : if (priv->dev2)
2975 0 : input_unregister_device(priv->dev2);
2976 0 : if (!IS_ERR_OR_NULL(priv->dev3))
2977 0 : input_unregister_device(priv->dev3);
2978 0 : kfree(priv);
2979 0 : }
2980 :
2981 0 : static void alps_set_abs_params_st(struct alps_data *priv,
2982 : struct input_dev *dev1)
2983 : {
2984 0 : input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0);
2985 0 : input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0);
2986 0 : input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
2987 0 : }
2988 :
2989 0 : static void alps_set_abs_params_mt_common(struct alps_data *priv,
2990 : struct input_dev *dev1)
2991 : {
2992 0 : input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0);
2993 0 : input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0);
2994 :
2995 0 : input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res);
2996 0 : input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res);
2997 :
2998 0 : set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
2999 0 : set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
3000 0 : }
3001 :
3002 0 : static void alps_set_abs_params_semi_mt(struct alps_data *priv,
3003 : struct input_dev *dev1)
3004 : {
3005 0 : alps_set_abs_params_mt_common(priv, dev1);
3006 0 : input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3007 :
3008 0 : input_mt_init_slots(dev1, MAX_TOUCHES,
3009 : INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3010 : INPUT_MT_SEMI_MT);
3011 0 : }
3012 :
3013 0 : static void alps_set_abs_params_v7(struct alps_data *priv,
3014 : struct input_dev *dev1)
3015 : {
3016 0 : alps_set_abs_params_mt_common(priv, dev1);
3017 0 : set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3018 :
3019 0 : input_mt_init_slots(dev1, MAX_TOUCHES,
3020 : INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3021 : INPUT_MT_TRACK);
3022 :
3023 0 : set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3024 0 : }
3025 :
3026 0 : static void alps_set_abs_params_ss4_v2(struct alps_data *priv,
3027 : struct input_dev *dev1)
3028 : {
3029 0 : alps_set_abs_params_mt_common(priv, dev1);
3030 0 : input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
3031 0 : set_bit(BTN_TOOL_QUINTTAP, dev1->keybit);
3032 :
3033 0 : input_mt_init_slots(dev1, MAX_TOUCHES,
3034 : INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED |
3035 : INPUT_MT_TRACK);
3036 0 : }
3037 :
3038 0 : int alps_init(struct psmouse *psmouse)
3039 : {
3040 0 : struct alps_data *priv = psmouse->private;
3041 0 : struct input_dev *dev1 = psmouse->dev;
3042 : int error;
3043 :
3044 0 : error = priv->hw_init(psmouse);
3045 0 : 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 0 : __clear_bit(EV_REL, dev1->evbit);
3053 0 : __clear_bit(REL_X, dev1->relbit);
3054 0 : __clear_bit(REL_Y, dev1->relbit);
3055 :
3056 : /*
3057 : * Now set up our capabilities.
3058 : */
3059 0 : dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
3060 0 : dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
3061 0 : dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
3062 0 : dev1->keybit[BIT_WORD(BTN_LEFT)] |=
3063 : BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
3064 :
3065 0 : dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
3066 :
3067 0 : priv->set_abs_params(priv, dev1);
3068 :
3069 0 : if (priv->flags & ALPS_WHEEL) {
3070 0 : dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
3071 0 : dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
3072 : }
3073 :
3074 0 : if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
3075 0 : dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
3076 0 : dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
3077 : }
3078 :
3079 0 : if (priv->flags & ALPS_FOUR_BUTTONS) {
3080 0 : dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
3081 0 : dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
3082 0 : dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
3083 0 : dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
3084 0 : } else if (priv->flags & ALPS_BUTTONPAD) {
3085 0 : set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit);
3086 0 : clear_bit(BTN_RIGHT, dev1->keybit);
3087 : } else {
3088 0 : dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
3089 : }
3090 :
3091 0 : if (priv->flags & ALPS_DUALPOINT) {
3092 : struct input_dev *dev2;
3093 :
3094 0 : dev2 = input_allocate_device();
3095 0 : if (!dev2) {
3096 0 : psmouse_err(psmouse,
3097 : "failed to allocate trackstick device\n");
3098 0 : error = -ENOMEM;
3099 0 : goto init_fail;
3100 : }
3101 :
3102 0 : snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1",
3103 0 : psmouse->ps2dev.serio->phys);
3104 0 : 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 0 : dev2->name = "AlpsPS/2 ALPS DualPoint Stick";
3111 :
3112 0 : dev2->id.bustype = BUS_I8042;
3113 0 : dev2->id.vendor = 0x0002;
3114 0 : dev2->id.product = PSMOUSE_ALPS;
3115 0 : dev2->id.version = priv->proto_version;
3116 0 : dev2->dev.parent = &psmouse->ps2dev.serio->dev;
3117 :
3118 0 : input_set_capability(dev2, EV_REL, REL_X);
3119 0 : input_set_capability(dev2, EV_REL, REL_Y);
3120 0 : if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) {
3121 0 : input_set_capability(dev2, EV_ABS, ABS_PRESSURE);
3122 0 : input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0);
3123 : }
3124 0 : input_set_capability(dev2, EV_KEY, BTN_LEFT);
3125 0 : input_set_capability(dev2, EV_KEY, BTN_RIGHT);
3126 0 : input_set_capability(dev2, EV_KEY, BTN_MIDDLE);
3127 :
3128 0 : __set_bit(INPUT_PROP_POINTER, dev2->propbit);
3129 0 : __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit);
3130 :
3131 0 : error = input_register_device(dev2);
3132 0 : if (error) {
3133 0 : psmouse_err(psmouse,
3134 : "failed to register trackstick device: %d\n",
3135 : error);
3136 0 : input_free_device(dev2);
3137 0 : goto init_fail;
3138 : }
3139 :
3140 0 : priv->dev2 = dev2;
3141 : }
3142 :
3143 0 : priv->psmouse = psmouse;
3144 :
3145 0 : INIT_DELAYED_WORK(&priv->dev3_register_work,
3146 : alps_register_bare_ps2_mouse);
3147 :
3148 0 : psmouse->protocol_handler = alps_process_byte;
3149 0 : psmouse->poll = alps_poll;
3150 0 : psmouse->disconnect = alps_disconnect;
3151 0 : psmouse->reconnect = alps_reconnect;
3152 0 : 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 0 : psmouse->resync_time = 0;
3156 :
3157 : /* Allow 2 invalid packets without resetting device */
3158 0 : psmouse->resetafter = psmouse->pktsize * 2;
3159 :
3160 0 : return 0;
3161 :
3162 : init_fail:
3163 0 : psmouse_reset(psmouse);
3164 : /*
3165 : * Even though we did not allocate psmouse->private we do free
3166 : * it here.
3167 : */
3168 0 : kfree(psmouse->private);
3169 0 : psmouse->private = NULL;
3170 0 : return error;
3171 : }
3172 :
3173 0 : int alps_detect(struct psmouse *psmouse, bool set_properties)
3174 : {
3175 : struct alps_data *priv;
3176 : int error;
3177 :
3178 0 : error = alps_identify(psmouse, NULL);
3179 0 : 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 0 : 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 0 : psmouse_reset(psmouse);
3203 :
3204 0 : priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
3205 0 : if (!priv)
3206 : return -ENOMEM;
3207 :
3208 0 : error = alps_identify(psmouse, priv);
3209 0 : if (error) {
3210 0 : kfree(priv);
3211 0 : return error;
3212 : }
3213 :
3214 0 : if (set_properties) {
3215 0 : psmouse->vendor = "ALPS";
3216 0 : psmouse->name = priv->flags & ALPS_DUALPOINT ?
3217 0 : "DualPoint TouchPad" : "GlidePoint";
3218 0 : 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 0 : kfree(priv);
3227 0 : psmouse->private = NULL;
3228 : }
3229 :
3230 : return 0;
3231 : }
3232 :
|
