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alps.c
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1 /*
2  * ALPS touchpad PS/2 mouse driver
3  *
4  * Copyright (c) 2003 Neil Brown <[email protected]>
5  * Copyright (c) 2003-2005 Peter Osterlund <[email protected]>
6  * Copyright (c) 2004 Dmitry Torokhov <[email protected]>
7  * Copyright (c) 2005 Vojtech Pavlik <[email protected]>
8  * Copyright (c) 2009 Sebastian Kapfer <[email protected]>
9  *
10  * ALPS detection, tap switching and status querying info is taken from
11  * tpconfig utility (by C. Scott Ananian and Bruce Kall).
12  *
13  * This program is free software; you can redistribute it and/or modify it
14  * under the terms of the GNU General Public License version 2 as published by
15  * the Free Software Foundation.
16  */
17 
18 #include <linux/slab.h>
19 #include <linux/input.h>
20 #include <linux/input/mt.h>
21 #include <linux/serio.h>
22 #include <linux/libps2.h>
23 
24 #include "psmouse.h"
25 #include "alps.h"
26 
27 /*
28  * Definitions for ALPS version 3 and 4 command mode protocol
29  */
30 #define ALPS_V3_X_MAX 2000
31 #define ALPS_V3_Y_MAX 1400
32 
33 #define ALPS_BITMAP_X_BITS 15
34 #define ALPS_BITMAP_Y_BITS 11
35 
36 #define ALPS_CMD_NIBBLE_10 0x01f2
37 
38 static const struct alps_nibble_commands alps_v3_nibble_commands[] = {
39  { PSMOUSE_CMD_SETPOLL, 0x00 }, /* 0 */
40  { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
41  { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
42  { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
43  { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
44  { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
45  { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
46  { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
47  { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
48  { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
49  { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
50  { PSMOUSE_CMD_SETRES, 0x00 }, /* b */
51  { PSMOUSE_CMD_SETRES, 0x01 }, /* c */
52  { PSMOUSE_CMD_SETRES, 0x02 }, /* d */
53  { PSMOUSE_CMD_SETRES, 0x03 }, /* e */
54  { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
55 };
56 
57 static const struct alps_nibble_commands alps_v4_nibble_commands[] = {
58  { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */
59  { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */
60  { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */
61  { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */
62  { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */
63  { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */
64  { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */
65  { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */
66  { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */
67  { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */
68  { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */
69  { PSMOUSE_CMD_SETRES, 0x00 }, /* b */
70  { PSMOUSE_CMD_SETRES, 0x01 }, /* c */
71  { PSMOUSE_CMD_SETRES, 0x02 }, /* d */
72  { PSMOUSE_CMD_SETRES, 0x03 }, /* e */
73  { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */
74 };
75 
76 
77 #define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */
78 #define ALPS_PASS 0x04 /* device has a pass-through port */
79 
80 #define ALPS_WHEEL 0x08 /* hardware wheel present */
81 #define ALPS_FW_BK_1 0x10 /* front & back buttons present */
82 #define ALPS_FW_BK_2 0x20 /* front & back buttons present */
83 #define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */
84 #define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with
85  6-byte ALPS packet */
86 
87 static const struct alps_model_info alps_model_data[] = {
88  { { 0x32, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Toshiba Salellite Pro M10 */
89  { { 0x33, 0x02, 0x0a }, 0x00, ALPS_PROTO_V1, 0x88, 0xf8, 0 }, /* UMAX-530T */
90  { { 0x53, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
91  { { 0x53, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
92  { { 0x60, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 }, /* HP ze1115 */
93  { { 0x63, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
94  { { 0x63, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
95  { { 0x63, 0x02, 0x28 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Fujitsu Siemens S6010 */
96  { { 0x63, 0x02, 0x3c }, 0x00, ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL }, /* Toshiba Satellite S2400-103 */
97  { { 0x63, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 }, /* NEC Versa L320 */
98  { { 0x63, 0x02, 0x64 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
99  { { 0x63, 0x03, 0xc8 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D800 */
100  { { 0x73, 0x00, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT }, /* ThinkPad R61 8918-5QG */
101  { { 0x73, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, 0 },
102  { { 0x73, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 }, /* Ahtec Laptop */
103  { { 0x20, 0x02, 0x0e }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT }, /* XXX */
104  { { 0x22, 0x02, 0x0a }, 0x00, ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT },
105  { { 0x22, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT }, /* Dell Latitude D600 */
106  /* Dell Latitude E5500, E6400, E6500, Precision M4400 */
107  { { 0x62, 0x02, 0x14 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf,
108  ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED },
109  { { 0x73, 0x02, 0x50 }, 0x00, ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS }, /* Dell Vostro 1400 */
110  { { 0x52, 0x01, 0x14 }, 0x00, ALPS_PROTO_V2, 0xff, 0xff,
111  ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED }, /* Toshiba Tecra A11-11L */
112  { { 0x73, 0x02, 0x64 }, 0x9b, ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT },
113  { { 0x73, 0x02, 0x64 }, 0x9d, ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT },
114  { { 0x73, 0x02, 0x64 }, 0x8a, ALPS_PROTO_V4, 0x8f, 0x8f, 0 },
115 };
116 
117 /*
118  * XXX - this entry is suspicious. First byte has zero lower nibble,
119  * which is what a normal mouse would report. Also, the value 0x0e
120  * isn't valid per PS/2 spec.
121  */
122 
123 /* Packet formats are described in Documentation/input/alps.txt */
124 
125 static bool alps_is_valid_first_byte(const struct alps_model_info *model,
126  unsigned char data)
127 {
128  return (data & model->mask0) == model->byte0;
129 }
130 
131 static void alps_report_buttons(struct psmouse *psmouse,
132  struct input_dev *dev1, struct input_dev *dev2,
133  int left, int right, int middle)
134 {
135  struct input_dev *dev;
136 
137  /*
138  * If shared button has already been reported on the
139  * other device (dev2) then this event should be also
140  * sent through that device.
141  */
142  dev = test_bit(BTN_LEFT, dev2->key) ? dev2 : dev1;
143  input_report_key(dev, BTN_LEFT, left);
144 
145  dev = test_bit(BTN_RIGHT, dev2->key) ? dev2 : dev1;
146  input_report_key(dev, BTN_RIGHT, right);
147 
148  dev = test_bit(BTN_MIDDLE, dev2->key) ? dev2 : dev1;
149  input_report_key(dev, BTN_MIDDLE, middle);
150 
151  /*
152  * Sync the _other_ device now, we'll do the first
153  * device later once we report the rest of the events.
154  */
155  input_sync(dev2);
156 }
157 
158 static void alps_process_packet_v1_v2(struct psmouse *psmouse)
159 {
160  struct alps_data *priv = psmouse->private;
161  const struct alps_model_info *model = priv->i;
162  unsigned char *packet = psmouse->packet;
163  struct input_dev *dev = psmouse->dev;
164  struct input_dev *dev2 = priv->dev2;
165  int x, y, z, ges, fin, left, right, middle;
166  int back = 0, forward = 0;
167 
168  if (model->proto_version == ALPS_PROTO_V1) {
169  left = packet[2] & 0x10;
170  right = packet[2] & 0x08;
171  middle = 0;
172  x = packet[1] | ((packet[0] & 0x07) << 7);
173  y = packet[4] | ((packet[3] & 0x07) << 7);
174  z = packet[5];
175  } else {
176  left = packet[3] & 1;
177  right = packet[3] & 2;
178  middle = packet[3] & 4;
179  x = packet[1] | ((packet[2] & 0x78) << (7 - 3));
180  y = packet[4] | ((packet[3] & 0x70) << (7 - 4));
181  z = packet[5];
182  }
183 
184  if (model->flags & ALPS_FW_BK_1) {
185  back = packet[0] & 0x10;
186  forward = packet[2] & 4;
187  }
188 
189  if (model->flags & ALPS_FW_BK_2) {
190  back = packet[3] & 4;
191  forward = packet[2] & 4;
192  if ((middle = forward && back))
193  forward = back = 0;
194  }
195 
196  ges = packet[2] & 1;
197  fin = packet[2] & 2;
198 
199  if ((model->flags & ALPS_DUALPOINT) && z == 127) {
200  input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x));
201  input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y));
202 
203  alps_report_buttons(psmouse, dev2, dev, left, right, middle);
204 
205  input_sync(dev2);
206  return;
207  }
208 
209  alps_report_buttons(psmouse, dev, dev2, left, right, middle);
210 
211  /* Convert hardware tap to a reasonable Z value */
212  if (ges && !fin)
213  z = 40;
214 
215  /*
216  * A "tap and drag" operation is reported by the hardware as a transition
217  * from (!fin && ges) to (fin && ges). This should be translated to the
218  * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually.
219  */
220  if (ges && fin && !priv->prev_fin) {
221  input_report_abs(dev, ABS_X, x);
222  input_report_abs(dev, ABS_Y, y);
223  input_report_abs(dev, ABS_PRESSURE, 0);
224  input_report_key(dev, BTN_TOOL_FINGER, 0);
225  input_sync(dev);
226  }
227  priv->prev_fin = fin;
228 
229  if (z > 30)
230  input_report_key(dev, BTN_TOUCH, 1);
231  if (z < 25)
232  input_report_key(dev, BTN_TOUCH, 0);
233 
234  if (z > 0) {
235  input_report_abs(dev, ABS_X, x);
236  input_report_abs(dev, ABS_Y, y);
237  }
238 
239  input_report_abs(dev, ABS_PRESSURE, z);
240  input_report_key(dev, BTN_TOOL_FINGER, z > 0);
241 
242  if (model->flags & ALPS_WHEEL)
243  input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07));
244 
245  if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
246  input_report_key(dev, BTN_FORWARD, forward);
247  input_report_key(dev, BTN_BACK, back);
248  }
249 
250  if (model->flags & ALPS_FOUR_BUTTONS) {
251  input_report_key(dev, BTN_0, packet[2] & 4);
252  input_report_key(dev, BTN_1, packet[0] & 0x10);
253  input_report_key(dev, BTN_2, packet[3] & 4);
254  input_report_key(dev, BTN_3, packet[0] & 0x20);
255  }
256 
257  input_sync(dev);
258 }
259 
260 /*
261  * Process bitmap data from v3 and v4 protocols. Returns the number of
262  * fingers detected. A return value of 0 means at least one of the
263  * bitmaps was empty.
264  *
265  * The bitmaps don't have enough data to track fingers, so this function
266  * only generates points representing a bounding box of all contacts.
267  * These points are returned in x1, y1, x2, and y2 when the return value
268  * is greater than 0.
269  */
270 static int alps_process_bitmap(unsigned int x_map, unsigned int y_map,
271  int *x1, int *y1, int *x2, int *y2)
272 {
273  struct alps_bitmap_point {
274  int start_bit;
275  int num_bits;
276  };
277 
278  int fingers_x = 0, fingers_y = 0, fingers;
279  int i, bit, prev_bit;
280  struct alps_bitmap_point x_low = {0,}, x_high = {0,};
281  struct alps_bitmap_point y_low = {0,}, y_high = {0,};
282  struct alps_bitmap_point *point;
283 
284  if (!x_map || !y_map)
285  return 0;
286 
287  *x1 = *y1 = *x2 = *y2 = 0;
288 
289  prev_bit = 0;
290  point = &x_low;
291  for (i = 0; x_map != 0; i++, x_map >>= 1) {
292  bit = x_map & 1;
293  if (bit) {
294  if (!prev_bit) {
295  point->start_bit = i;
296  fingers_x++;
297  }
298  point->num_bits++;
299  } else {
300  if (prev_bit)
301  point = &x_high;
302  else
303  point->num_bits = 0;
304  }
305  prev_bit = bit;
306  }
307 
308  /*
309  * y bitmap is reversed for what we need (lower positions are in
310  * higher bits), so we process from the top end.
311  */
312  y_map = y_map << (sizeof(y_map) * BITS_PER_BYTE - ALPS_BITMAP_Y_BITS);
313  prev_bit = 0;
314  point = &y_low;
315  for (i = 0; y_map != 0; i++, y_map <<= 1) {
316  bit = y_map & (1 << (sizeof(y_map) * BITS_PER_BYTE - 1));
317  if (bit) {
318  if (!prev_bit) {
319  point->start_bit = i;
320  fingers_y++;
321  }
322  point->num_bits++;
323  } else {
324  if (prev_bit)
325  point = &y_high;
326  else
327  point->num_bits = 0;
328  }
329  prev_bit = bit;
330  }
331 
332  /*
333  * Fingers can overlap, so we use the maximum count of fingers
334  * on either axis as the finger count.
335  */
336  fingers = max(fingers_x, fingers_y);
337 
338  /*
339  * If total fingers is > 1 but either axis reports only a single
340  * contact, we have overlapping or adjacent fingers. For the
341  * purposes of creating a bounding box, divide the single contact
342  * (roughly) equally between the two points.
343  */
344  if (fingers > 1) {
345  if (fingers_x == 1) {
346  i = x_low.num_bits / 2;
347  x_low.num_bits = x_low.num_bits - i;
348  x_high.start_bit = x_low.start_bit + i;
349  x_high.num_bits = max(i, 1);
350  } else if (fingers_y == 1) {
351  i = y_low.num_bits / 2;
352  y_low.num_bits = y_low.num_bits - i;
353  y_high.start_bit = y_low.start_bit + i;
354  y_high.num_bits = max(i, 1);
355  }
356  }
357 
358  *x1 = (ALPS_V3_X_MAX * (2 * x_low.start_bit + x_low.num_bits - 1)) /
359  (2 * (ALPS_BITMAP_X_BITS - 1));
360  *y1 = (ALPS_V3_Y_MAX * (2 * y_low.start_bit + y_low.num_bits - 1)) /
361  (2 * (ALPS_BITMAP_Y_BITS - 1));
362 
363  if (fingers > 1) {
364  *x2 = (ALPS_V3_X_MAX * (2 * x_high.start_bit + x_high.num_bits - 1)) /
365  (2 * (ALPS_BITMAP_X_BITS - 1));
366  *y2 = (ALPS_V3_Y_MAX * (2 * y_high.start_bit + y_high.num_bits - 1)) /
367  (2 * (ALPS_BITMAP_Y_BITS - 1));
368  }
369 
370  return fingers;
371 }
372 
373 static void alps_set_slot(struct input_dev *dev, int slot, bool active,
374  int x, int y)
375 {
376  input_mt_slot(dev, slot);
377  input_mt_report_slot_state(dev, MT_TOOL_FINGER, active);
378  if (active) {
379  input_report_abs(dev, ABS_MT_POSITION_X, x);
380  input_report_abs(dev, ABS_MT_POSITION_Y, y);
381  }
382 }
383 
384 static void alps_report_semi_mt_data(struct input_dev *dev, int num_fingers,
385  int x1, int y1, int x2, int y2)
386 {
387  alps_set_slot(dev, 0, num_fingers != 0, x1, y1);
388  alps_set_slot(dev, 1, num_fingers == 2, x2, y2);
389 }
390 
391 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse)
392 {
393  struct alps_data *priv = psmouse->private;
394  unsigned char *packet = psmouse->packet;
395  struct input_dev *dev = priv->dev2;
396  int x, y, z, left, right, middle;
397 
398  /* Sanity check packet */
399  if (!(packet[0] & 0x40)) {
400  psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n");
401  return;
402  }
403 
404  /*
405  * There's a special packet that seems to indicate the end
406  * of a stream of trackstick data. Filter these out.
407  */
408  if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f)
409  return;
410 
411  x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f));
412  y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f));
413  z = (packet[4] & 0x7c) >> 2;
414 
415  /*
416  * The x and y values tend to be quite large, and when used
417  * alone the trackstick is difficult to use. Scale them down
418  * to compensate.
419  */
420  x /= 8;
421  y /= 8;
422 
423  input_report_rel(dev, REL_X, x);
424  input_report_rel(dev, REL_Y, -y);
425 
426  /*
427  * Most ALPS models report the trackstick buttons in the touchpad
428  * packets, but a few report them here. No reliable way has been
429  * found to differentiate between the models upfront, so we enable
430  * the quirk in response to seeing a button press in the trackstick
431  * packet.
432  */
433  left = packet[3] & 0x01;
434  right = packet[3] & 0x02;
435  middle = packet[3] & 0x04;
436 
437  if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) &&
438  (left || right || middle))
439  priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS;
440 
441  if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) {
442  input_report_key(dev, BTN_LEFT, left);
443  input_report_key(dev, BTN_RIGHT, right);
444  input_report_key(dev, BTN_MIDDLE, middle);
445  }
446 
447  input_sync(dev);
448  return;
449 }
450 
451 static void alps_process_touchpad_packet_v3(struct psmouse *psmouse)
452 {
453  struct alps_data *priv = psmouse->private;
454  unsigned char *packet = psmouse->packet;
455  struct input_dev *dev = psmouse->dev;
456  struct input_dev *dev2 = priv->dev2;
457  int x, y, z;
458  int left, right, middle;
459  int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
460  int fingers = 0, bmap_fingers;
461  unsigned int x_bitmap, y_bitmap;
462 
463  /*
464  * There's no single feature of touchpad position and bitmap packets
465  * that can be used to distinguish between them. We rely on the fact
466  * that a bitmap packet should always follow a position packet with
467  * bit 6 of packet[4] set.
468  */
469  if (priv->multi_packet) {
470  /*
471  * Sometimes a position packet will indicate a multi-packet
472  * sequence, but then what follows is another position
473  * packet. Check for this, and when it happens process the
474  * position packet as usual.
475  */
476  if (packet[0] & 0x40) {
477  fingers = (packet[5] & 0x3) + 1;
478  x_bitmap = ((packet[4] & 0x7e) << 8) |
479  ((packet[1] & 0x7f) << 2) |
480  ((packet[0] & 0x30) >> 4);
481  y_bitmap = ((packet[3] & 0x70) << 4) |
482  ((packet[2] & 0x7f) << 1) |
483  (packet[4] & 0x01);
484 
485  bmap_fingers = alps_process_bitmap(x_bitmap, y_bitmap,
486  &x1, &y1, &x2, &y2);
487 
488  /*
489  * We shouldn't report more than one finger if
490  * we don't have two coordinates.
491  */
492  if (fingers > 1 && bmap_fingers < 2)
493  fingers = bmap_fingers;
494 
495  /* Now process position packet */
496  packet = priv->multi_data;
497  } else {
498  priv->multi_packet = 0;
499  }
500  }
501 
502  /*
503  * Bit 6 of byte 0 is not usually set in position packets. The only
504  * times it seems to be set is in situations where the data is
505  * suspect anyway, e.g. a palm resting flat on the touchpad. Given
506  * this combined with the fact that this bit is useful for filtering
507  * out misidentified bitmap packets, we reject anything with this
508  * bit set.
509  */
510  if (packet[0] & 0x40)
511  return;
512 
513  if (!priv->multi_packet && (packet[4] & 0x40)) {
514  priv->multi_packet = 1;
515  memcpy(priv->multi_data, packet, sizeof(priv->multi_data));
516  return;
517  }
518 
519  priv->multi_packet = 0;
520 
521  left = packet[3] & 0x01;
522  right = packet[3] & 0x02;
523  middle = packet[3] & 0x04;
524 
525  x = ((packet[1] & 0x7f) << 4) | ((packet[4] & 0x30) >> 2) |
526  ((packet[0] & 0x30) >> 4);
527  y = ((packet[2] & 0x7f) << 4) | (packet[4] & 0x0f);
528  z = packet[5] & 0x7f;
529 
530  /*
531  * Sometimes the hardware sends a single packet with z = 0
532  * in the middle of a stream. Real releases generate packets
533  * with x, y, and z all zero, so these seem to be flukes.
534  * Ignore them.
535  */
536  if (x && y && !z)
537  return;
538 
539  /*
540  * If we don't have MT data or the bitmaps were empty, we have
541  * to rely on ST data.
542  */
543  if (!fingers) {
544  x1 = x;
545  y1 = y;
546  fingers = z > 0 ? 1 : 0;
547  }
548 
549  if (z >= 64)
550  input_report_key(dev, BTN_TOUCH, 1);
551  else
552  input_report_key(dev, BTN_TOUCH, 0);
553 
554  alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
555 
556  input_mt_report_finger_count(dev, fingers);
557 
558  input_report_key(dev, BTN_LEFT, left);
559  input_report_key(dev, BTN_RIGHT, right);
560  input_report_key(dev, BTN_MIDDLE, middle);
561 
562  if (z > 0) {
563  input_report_abs(dev, ABS_X, x);
564  input_report_abs(dev, ABS_Y, y);
565  }
566  input_report_abs(dev, ABS_PRESSURE, z);
567 
568  input_sync(dev);
569 
570  if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) {
571  left = packet[3] & 0x10;
572  right = packet[3] & 0x20;
573  middle = packet[3] & 0x40;
574 
575  input_report_key(dev2, BTN_LEFT, left);
576  input_report_key(dev2, BTN_RIGHT, right);
577  input_report_key(dev2, BTN_MIDDLE, middle);
578  input_sync(dev2);
579  }
580 }
581 
582 static void alps_process_packet_v3(struct psmouse *psmouse)
583 {
584  unsigned char *packet = psmouse->packet;
585 
586  /*
587  * v3 protocol packets come in three types, two representing
588  * touchpad data and one representing trackstick data.
589  * Trackstick packets seem to be distinguished by always
590  * having 0x3f in the last byte. This value has never been
591  * observed in the last byte of either of the other types
592  * of packets.
593  */
594  if (packet[5] == 0x3f) {
595  alps_process_trackstick_packet_v3(psmouse);
596  return;
597  }
598 
599  alps_process_touchpad_packet_v3(psmouse);
600 }
601 
602 static void alps_process_packet_v4(struct psmouse *psmouse)
603 {
604  struct alps_data *priv = psmouse->private;
605  unsigned char *packet = psmouse->packet;
606  struct input_dev *dev = psmouse->dev;
607  int offset;
608  int x, y, z;
609  int left, right;
610  int x1, y1, x2, y2;
611  int fingers = 0;
612  unsigned int x_bitmap, y_bitmap;
613 
614  /*
615  * v4 has a 6-byte encoding for bitmap data, but this data is
616  * broken up between 3 normal packets. Use priv->multi_packet to
617  * track our position in the bitmap packet.
618  */
619  if (packet[6] & 0x40) {
620  /* sync, reset position */
621  priv->multi_packet = 0;
622  }
623 
624  if (WARN_ON_ONCE(priv->multi_packet > 2))
625  return;
626 
627  offset = 2 * priv->multi_packet;
628  priv->multi_data[offset] = packet[6];
629  priv->multi_data[offset + 1] = packet[7];
630 
631  if (++priv->multi_packet > 2) {
632  priv->multi_packet = 0;
633 
634  x_bitmap = ((priv->multi_data[2] & 0x1f) << 10) |
635  ((priv->multi_data[3] & 0x60) << 3) |
636  ((priv->multi_data[0] & 0x3f) << 2) |
637  ((priv->multi_data[1] & 0x60) >> 5);
638  y_bitmap = ((priv->multi_data[5] & 0x01) << 10) |
639  ((priv->multi_data[3] & 0x1f) << 5) |
640  (priv->multi_data[1] & 0x1f);
641 
642  fingers = alps_process_bitmap(x_bitmap, y_bitmap,
643  &x1, &y1, &x2, &y2);
644 
645  /* Store MT data.*/
646  priv->fingers = fingers;
647  priv->x1 = x1;
648  priv->x2 = x2;
649  priv->y1 = y1;
650  priv->y2 = y2;
651  }
652 
653  left = packet[4] & 0x01;
654  right = packet[4] & 0x02;
655 
656  x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) |
657  ((packet[0] & 0x30) >> 4);
658  y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f);
659  z = packet[5] & 0x7f;
660 
661  /*
662  * If there were no contacts in the bitmap, use ST
663  * points in MT reports.
664  * If there were two contacts or more, report MT data.
665  */
666  if (priv->fingers < 2) {
667  x1 = x;
668  y1 = y;
669  fingers = z > 0 ? 1 : 0;
670  } else {
671  fingers = priv->fingers;
672  x1 = priv->x1;
673  x2 = priv->x2;
674  y1 = priv->y1;
675  y2 = priv->y2;
676  }
677 
678  if (z >= 64)
679  input_report_key(dev, BTN_TOUCH, 1);
680  else
681  input_report_key(dev, BTN_TOUCH, 0);
682 
683  alps_report_semi_mt_data(dev, fingers, x1, y1, x2, y2);
684 
685  input_mt_report_finger_count(dev, fingers);
686 
687  input_report_key(dev, BTN_LEFT, left);
688  input_report_key(dev, BTN_RIGHT, right);
689 
690  if (z > 0) {
691  input_report_abs(dev, ABS_X, x);
692  input_report_abs(dev, ABS_Y, y);
693  }
694  input_report_abs(dev, ABS_PRESSURE, z);
695 
696  input_sync(dev);
697 }
698 
699 static void alps_process_packet(struct psmouse *psmouse)
700 {
701  struct alps_data *priv = psmouse->private;
702  const struct alps_model_info *model = priv->i;
703 
704  switch (model->proto_version) {
705  case ALPS_PROTO_V1:
706  case ALPS_PROTO_V2:
707  alps_process_packet_v1_v2(psmouse);
708  break;
709  case ALPS_PROTO_V3:
710  alps_process_packet_v3(psmouse);
711  break;
712  case ALPS_PROTO_V4:
713  alps_process_packet_v4(psmouse);
714  break;
715  }
716 }
717 
718 static void alps_report_bare_ps2_packet(struct psmouse *psmouse,
719  unsigned char packet[],
720  bool report_buttons)
721 {
722  struct alps_data *priv = psmouse->private;
723  struct input_dev *dev2 = priv->dev2;
724 
725  if (report_buttons)
726  alps_report_buttons(psmouse, dev2, psmouse->dev,
727  packet[0] & 1, packet[0] & 2, packet[0] & 4);
728 
729  input_report_rel(dev2, REL_X,
730  packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0);
731  input_report_rel(dev2, REL_Y,
732  packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0);
733 
734  input_sync(dev2);
735 }
736 
737 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse)
738 {
739  struct alps_data *priv = psmouse->private;
740 
741  if (psmouse->pktcnt < 6)
742  return PSMOUSE_GOOD_DATA;
743 
744  if (psmouse->pktcnt == 6) {
745  /*
746  * Start a timer to flush the packet if it ends up last
747  * 6-byte packet in the stream. Timer needs to fire
748  * psmouse core times out itself. 20 ms should be enough
749  * to decide if we are getting more data or not.
750  */
751  mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20));
752  return PSMOUSE_GOOD_DATA;
753  }
754 
755  del_timer(&priv->timer);
756 
757  if (psmouse->packet[6] & 0x80) {
758 
759  /*
760  * Highest bit is set - that means we either had
761  * complete ALPS packet and this is start of the
762  * next packet or we got garbage.
763  */
764 
765  if (((psmouse->packet[3] |
766  psmouse->packet[4] |
767  psmouse->packet[5]) & 0x80) ||
768  (!alps_is_valid_first_byte(priv->i, psmouse->packet[6]))) {
769  psmouse_dbg(psmouse,
770  "refusing packet %x %x %x %x (suspected interleaved ps/2)\n",
771  psmouse->packet[3], psmouse->packet[4],
772  psmouse->packet[5], psmouse->packet[6]);
773  return PSMOUSE_BAD_DATA;
774  }
775 
776  alps_process_packet(psmouse);
777 
778  /* Continue with the next packet */
779  psmouse->packet[0] = psmouse->packet[6];
780  psmouse->pktcnt = 1;
781 
782  } else {
783 
784  /*
785  * High bit is 0 - that means that we indeed got a PS/2
786  * packet in the middle of ALPS packet.
787  *
788  * There is also possibility that we got 6-byte ALPS
789  * packet followed by 3-byte packet from trackpoint. We
790  * can not distinguish between these 2 scenarios but
791  * because the latter is unlikely to happen in course of
792  * normal operation (user would need to press all
793  * buttons on the pad and start moving trackpoint
794  * without touching the pad surface) we assume former.
795  * Even if we are wrong the wost thing that would happen
796  * the cursor would jump but we should not get protocol
797  * de-synchronization.
798  */
799 
800  alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3],
801  false);
802 
803  /*
804  * Continue with the standard ALPS protocol handling,
805  * but make sure we won't process it as an interleaved
806  * packet again, which may happen if all buttons are
807  * pressed. To avoid this let's reset the 4th bit which
808  * is normally 1.
809  */
810  psmouse->packet[3] = psmouse->packet[6] & 0xf7;
811  psmouse->pktcnt = 4;
812  }
813 
814  return PSMOUSE_GOOD_DATA;
815 }
816 
817 static void alps_flush_packet(unsigned long data)
818 {
819  struct psmouse *psmouse = (struct psmouse *)data;
820 
821  serio_pause_rx(psmouse->ps2dev.serio);
822 
823  if (psmouse->pktcnt == psmouse->pktsize) {
824 
825  /*
826  * We did not any more data in reasonable amount of time.
827  * Validate the last 3 bytes and process as a standard
828  * ALPS packet.
829  */
830  if ((psmouse->packet[3] |
831  psmouse->packet[4] |
832  psmouse->packet[5]) & 0x80) {
833  psmouse_dbg(psmouse,
834  "refusing packet %x %x %x (suspected interleaved ps/2)\n",
835  psmouse->packet[3], psmouse->packet[4],
836  psmouse->packet[5]);
837  } else {
838  alps_process_packet(psmouse);
839  }
840  psmouse->pktcnt = 0;
841  }
842 
843  serio_continue_rx(psmouse->ps2dev.serio);
844 }
845 
846 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse)
847 {
848  struct alps_data *priv = psmouse->private;
849  const struct alps_model_info *model = priv->i;
850 
851  if ((psmouse->packet[0] & 0xc8) == 0x08) { /* PS/2 packet */
852  if (psmouse->pktcnt == 3) {
853  alps_report_bare_ps2_packet(psmouse, psmouse->packet,
854  true);
855  return PSMOUSE_FULL_PACKET;
856  }
857  return PSMOUSE_GOOD_DATA;
858  }
859 
860  /* Check for PS/2 packet stuffed in the middle of ALPS packet. */
861 
862  if ((model->flags & ALPS_PS2_INTERLEAVED) &&
863  psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) {
864  return alps_handle_interleaved_ps2(psmouse);
865  }
866 
867  if (!alps_is_valid_first_byte(model, psmouse->packet[0])) {
868  psmouse_dbg(psmouse,
869  "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n",
870  psmouse->packet[0], model->mask0, model->byte0);
871  return PSMOUSE_BAD_DATA;
872  }
873 
874  /* Bytes 2 - pktsize should have 0 in the highest bit */
875  if (psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize &&
876  (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) {
877  psmouse_dbg(psmouse, "refusing packet[%i] = %x\n",
878  psmouse->pktcnt - 1,
879  psmouse->packet[psmouse->pktcnt - 1]);
880  return PSMOUSE_BAD_DATA;
881  }
882 
883  if (psmouse->pktcnt == psmouse->pktsize) {
884  alps_process_packet(psmouse);
885  return PSMOUSE_FULL_PACKET;
886  }
887 
888  return PSMOUSE_GOOD_DATA;
889 }
890 
891 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble)
892 {
893  struct ps2dev *ps2dev = &psmouse->ps2dev;
894  struct alps_data *priv = psmouse->private;
895  int command;
896  unsigned char *param;
897  unsigned char dummy[4];
898 
899  BUG_ON(nibble > 0xf);
900 
901  command = priv->nibble_commands[nibble].command;
902  param = (command & 0x0f00) ?
903  dummy : (unsigned char *)&priv->nibble_commands[nibble].data;
904 
905  if (ps2_command(ps2dev, param, command))
906  return -1;
907 
908  return 0;
909 }
910 
911 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr)
912 {
913  struct ps2dev *ps2dev = &psmouse->ps2dev;
914  struct alps_data *priv = psmouse->private;
915  int i, nibble;
916 
917  if (ps2_command(ps2dev, NULL, priv->addr_command))
918  return -1;
919 
920  for (i = 12; i >= 0; i -= 4) {
921  nibble = (addr >> i) & 0xf;
922  if (alps_command_mode_send_nibble(psmouse, nibble))
923  return -1;
924  }
925 
926  return 0;
927 }
928 
929 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
930 {
931  struct ps2dev *ps2dev = &psmouse->ps2dev;
932  unsigned char param[4];
933 
934  if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
935  return -1;
936 
937  /*
938  * The address being read is returned in the first two bytes
939  * of the result. Check that this address matches the expected
940  * address.
941  */
942  if (addr != ((param[0] << 8) | param[1]))
943  return -1;
944 
945  return param[2];
946 }
947 
948 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr)
949 {
950  if (alps_command_mode_set_addr(psmouse, addr))
951  return -1;
952  return __alps_command_mode_read_reg(psmouse, addr);
953 }
954 
955 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value)
956 {
957  if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf))
958  return -1;
959  if (alps_command_mode_send_nibble(psmouse, value & 0xf))
960  return -1;
961  return 0;
962 }
963 
964 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr,
965  u8 value)
966 {
967  if (alps_command_mode_set_addr(psmouse, addr))
968  return -1;
969  return __alps_command_mode_write_reg(psmouse, value);
970 }
971 
972 static int alps_enter_command_mode(struct psmouse *psmouse,
973  unsigned char *resp)
974 {
975  unsigned char param[4];
976  struct ps2dev *ps2dev = &psmouse->ps2dev;
977 
978  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
979  ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
980  ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) ||
981  ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
982  psmouse_err(psmouse, "failed to enter command mode\n");
983  return -1;
984  }
985 
986  if (param[0] != 0x88 && param[1] != 0x07) {
987  psmouse_dbg(psmouse,
988  "unknown response while entering command mode: %2.2x %2.2x %2.2x\n",
989  param[0], param[1], param[2]);
990  return -1;
991  }
992 
993  if (resp)
994  *resp = param[2];
995  return 0;
996 }
997 
998 static inline int alps_exit_command_mode(struct psmouse *psmouse)
999 {
1000  struct ps2dev *ps2dev = &psmouse->ps2dev;
1001  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM))
1002  return -1;
1003  return 0;
1004 }
1005 
1006 static const struct alps_model_info *alps_get_model(struct psmouse *psmouse, int *version)
1007 {
1008  struct ps2dev *ps2dev = &psmouse->ps2dev;
1009  static const unsigned char rates[] = { 0, 10, 20, 40, 60, 80, 100, 200 };
1010  unsigned char param[4];
1011  const struct alps_model_info *model = NULL;
1012  int i;
1013 
1014  /*
1015  * First try "E6 report".
1016  * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed.
1017  * The bits 0-2 of the first byte will be 1s if some buttons are
1018  * pressed.
1019  */
1020  param[0] = 0;
1021  if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
1022  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1023  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1024  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11))
1025  return NULL;
1026 
1027  param[0] = param[1] = param[2] = 0xff;
1028  if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1029  return NULL;
1030 
1031  psmouse_dbg(psmouse, "E6 report: %2.2x %2.2x %2.2x",
1032  param[0], param[1], param[2]);
1033 
1034  if ((param[0] & 0xf8) != 0 || param[1] != 0 ||
1035  (param[2] != 10 && param[2] != 100))
1036  return NULL;
1037 
1038  /*
1039  * Now try "E7 report". Allowed responses are in
1040  * alps_model_data[].signature
1041  */
1042  param[0] = 0;
1043  if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES) ||
1044  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1045  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1046  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21))
1047  return NULL;
1048 
1049  param[0] = param[1] = param[2] = 0xff;
1050  if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1051  return NULL;
1052 
1053  psmouse_dbg(psmouse, "E7 report: %2.2x %2.2x %2.2x",
1054  param[0], param[1], param[2]);
1055 
1056  if (version) {
1057  for (i = 0; i < ARRAY_SIZE(rates) && param[2] != rates[i]; i++)
1058  /* empty */;
1059  *version = (param[0] << 8) | (param[1] << 4) | i;
1060  }
1061 
1062  for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1063  if (!memcmp(param, alps_model_data[i].signature,
1064  sizeof(alps_model_data[i].signature))) {
1065  model = alps_model_data + i;
1066  break;
1067  }
1068  }
1069 
1070  if (model && model->proto_version > ALPS_PROTO_V2) {
1071  /*
1072  * Need to check command mode response to identify
1073  * model
1074  */
1075  model = NULL;
1076  if (alps_enter_command_mode(psmouse, param)) {
1077  psmouse_warn(psmouse,
1078  "touchpad failed to enter command mode\n");
1079  } else {
1080  for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) {
1081  if (alps_model_data[i].proto_version > ALPS_PROTO_V2 &&
1082  alps_model_data[i].command_mode_resp == param[0]) {
1083  model = alps_model_data + i;
1084  break;
1085  }
1086  }
1087  alps_exit_command_mode(psmouse);
1088 
1089  if (!model)
1090  psmouse_dbg(psmouse,
1091  "Unknown command mode response %2.2x\n",
1092  param[0]);
1093  }
1094  }
1095 
1096  return model;
1097 }
1098 
1099 /*
1100  * For DualPoint devices select the device that should respond to
1101  * subsequent commands. It looks like glidepad is behind stickpointer,
1102  * I'd thought it would be other way around...
1103  */
1104 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable)
1105 {
1106  struct ps2dev *ps2dev = &psmouse->ps2dev;
1107  int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11;
1108 
1109  if (ps2_command(ps2dev, NULL, cmd) ||
1110  ps2_command(ps2dev, NULL, cmd) ||
1111  ps2_command(ps2dev, NULL, cmd) ||
1112  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE))
1113  return -1;
1114 
1115  /* we may get 3 more bytes, just ignore them */
1116  ps2_drain(ps2dev, 3, 100);
1117 
1118  return 0;
1119 }
1120 
1121 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse)
1122 {
1123  struct ps2dev *ps2dev = &psmouse->ps2dev;
1124 
1125  /* Try ALPS magic knock - 4 disable before enable */
1126  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1127  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1128  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1129  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1130  ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE))
1131  return -1;
1132 
1133  /*
1134  * Switch mouse to poll (remote) mode so motion data will not
1135  * get in our way
1136  */
1137  return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL);
1138 }
1139 
1140 static int alps_get_status(struct psmouse *psmouse, char *param)
1141 {
1142  struct ps2dev *ps2dev = &psmouse->ps2dev;
1143 
1144  /* Get status: 0xF5 0xF5 0xF5 0xE9 */
1145  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1146  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1147  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1148  ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO))
1149  return -1;
1150 
1151  psmouse_dbg(psmouse, "Status: %2.2x %2.2x %2.2x",
1152  param[0], param[1], param[2]);
1153 
1154  return 0;
1155 }
1156 
1157 /*
1158  * Turn touchpad tapping on or off. The sequences are:
1159  * 0xE9 0xF5 0xF5 0xF3 0x0A to enable,
1160  * 0xE9 0xF5 0xF5 0xE8 0x00 to disable.
1161  * My guess that 0xE9 (GetInfo) is here as a sync point.
1162  * For models that also have stickpointer (DualPoints) its tapping
1163  * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but
1164  * we don't fiddle with it.
1165  */
1166 static int alps_tap_mode(struct psmouse *psmouse, int enable)
1167 {
1168  struct ps2dev *ps2dev = &psmouse->ps2dev;
1169  int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES;
1170  unsigned char tap_arg = enable ? 0x0A : 0x00;
1171  unsigned char param[4];
1172 
1173  if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) ||
1174  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1175  ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) ||
1176  ps2_command(ps2dev, &tap_arg, cmd))
1177  return -1;
1178 
1179  if (alps_get_status(psmouse, param))
1180  return -1;
1181 
1182  return 0;
1183 }
1184 
1185 /*
1186  * alps_poll() - poll the touchpad for current motion packet.
1187  * Used in resync.
1188  */
1189 static int alps_poll(struct psmouse *psmouse)
1190 {
1191  struct alps_data *priv = psmouse->private;
1192  unsigned char buf[sizeof(psmouse->packet)];
1193  bool poll_failed;
1194 
1195  if (priv->i->flags & ALPS_PASS)
1196  alps_passthrough_mode_v2(psmouse, true);
1197 
1198  poll_failed = ps2_command(&psmouse->ps2dev, buf,
1199  PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0;
1200 
1201  if (priv->i->flags & ALPS_PASS)
1202  alps_passthrough_mode_v2(psmouse, false);
1203 
1204  if (poll_failed || (buf[0] & priv->i->mask0) != priv->i->byte0)
1205  return -1;
1206 
1207  if ((psmouse->badbyte & 0xc8) == 0x08) {
1208 /*
1209  * Poll the track stick ...
1210  */
1211  if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8)))
1212  return -1;
1213  }
1214 
1215  memcpy(psmouse->packet, buf, sizeof(buf));
1216  return 0;
1217 }
1218 
1219 static int alps_hw_init_v1_v2(struct psmouse *psmouse)
1220 {
1221  struct alps_data *priv = psmouse->private;
1222  const struct alps_model_info *model = priv->i;
1223 
1224  if ((model->flags & ALPS_PASS) &&
1225  alps_passthrough_mode_v2(psmouse, true)) {
1226  return -1;
1227  }
1228 
1229  if (alps_tap_mode(psmouse, true)) {
1230  psmouse_warn(psmouse, "Failed to enable hardware tapping\n");
1231  return -1;
1232  }
1233 
1234  if (alps_absolute_mode_v1_v2(psmouse)) {
1235  psmouse_err(psmouse, "Failed to enable absolute mode\n");
1236  return -1;
1237  }
1238 
1239  if ((model->flags & ALPS_PASS) &&
1240  alps_passthrough_mode_v2(psmouse, false)) {
1241  return -1;
1242  }
1243 
1244  /* ALPS needs stream mode, otherwise it won't report any data */
1245  if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) {
1246  psmouse_err(psmouse, "Failed to enable stream mode\n");
1247  return -1;
1248  }
1249 
1250  return 0;
1251 }
1252 
1253 /*
1254  * Enable or disable passthrough mode to the trackstick. Must be in
1255  * command mode when calling this function.
1256  */
1257 static int alps_passthrough_mode_v3(struct psmouse *psmouse, bool enable)
1258 {
1259  int reg_val;
1260 
1261  reg_val = alps_command_mode_read_reg(psmouse, 0x0008);
1262  if (reg_val == -1)
1263  return -1;
1264 
1265  if (enable)
1266  reg_val |= 0x01;
1267  else
1268  reg_val &= ~0x01;
1269 
1270  if (__alps_command_mode_write_reg(psmouse, reg_val))
1271  return -1;
1272 
1273  return 0;
1274 }
1275 
1276 /* Must be in command mode when calling this function */
1277 static int alps_absolute_mode_v3(struct psmouse *psmouse)
1278 {
1279  int reg_val;
1280 
1281  reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1282  if (reg_val == -1)
1283  return -1;
1284 
1285  reg_val |= 0x06;
1286  if (__alps_command_mode_write_reg(psmouse, reg_val))
1287  return -1;
1288 
1289  return 0;
1290 }
1291 
1292 static int alps_hw_init_v3(struct psmouse *psmouse)
1293 {
1294  struct alps_data *priv = psmouse->private;
1295  struct ps2dev *ps2dev = &psmouse->ps2dev;
1296  int reg_val;
1297  unsigned char param[4];
1298 
1299  priv->nibble_commands = alps_v3_nibble_commands;
1300  priv->addr_command = PSMOUSE_CMD_RESET_WRAP;
1301 
1302  if (alps_enter_command_mode(psmouse, NULL))
1303  goto error;
1304 
1305  /* Check for trackstick */
1306  reg_val = alps_command_mode_read_reg(psmouse, 0x0008);
1307  if (reg_val == -1)
1308  goto error;
1309  if (reg_val & 0x80) {
1310  if (alps_passthrough_mode_v3(psmouse, true))
1311  goto error;
1312  if (alps_exit_command_mode(psmouse))
1313  goto error;
1314 
1315  /*
1316  * E7 report for the trackstick
1317  *
1318  * There have been reports of failures to seem to trace back
1319  * to the above trackstick check failing. When these occur
1320  * this E7 report fails, so when that happens we continue
1321  * with the assumption that there isn't a trackstick after
1322  * all.
1323  */
1324  param[0] = 0x64;
1325  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1326  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1327  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) ||
1328  ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) {
1329  psmouse_warn(psmouse, "trackstick E7 report failed\n");
1330  } else {
1331  psmouse_dbg(psmouse,
1332  "trackstick E7 report: %2.2x %2.2x %2.2x\n",
1333  param[0], param[1], param[2]);
1334 
1335  /*
1336  * Not sure what this does, but it is absolutely
1337  * essential. Without it, the touchpad does not
1338  * work at all and the trackstick just emits normal
1339  * PS/2 packets.
1340  */
1341  if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1342  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1343  ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) ||
1344  alps_command_mode_send_nibble(psmouse, 0x9) ||
1345  alps_command_mode_send_nibble(psmouse, 0x4)) {
1346  psmouse_err(psmouse,
1347  "Error sending magic E6 sequence\n");
1348  goto error_passthrough;
1349  }
1350  }
1351 
1352  if (alps_enter_command_mode(psmouse, NULL))
1353  goto error_passthrough;
1354  if (alps_passthrough_mode_v3(psmouse, false))
1355  goto error;
1356  }
1357 
1358  if (alps_absolute_mode_v3(psmouse)) {
1359  psmouse_err(psmouse, "Failed to enter absolute mode\n");
1360  goto error;
1361  }
1362 
1363  reg_val = alps_command_mode_read_reg(psmouse, 0x0006);
1364  if (reg_val == -1)
1365  goto error;
1366  if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1367  goto error;
1368 
1369  reg_val = alps_command_mode_read_reg(psmouse, 0x0007);
1370  if (reg_val == -1)
1371  goto error;
1372  if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01))
1373  goto error;
1374 
1375  if (alps_command_mode_read_reg(psmouse, 0x0144) == -1)
1376  goto error;
1377  if (__alps_command_mode_write_reg(psmouse, 0x04))
1378  goto error;
1379 
1380  if (alps_command_mode_read_reg(psmouse, 0x0159) == -1)
1381  goto error;
1382  if (__alps_command_mode_write_reg(psmouse, 0x03))
1383  goto error;
1384 
1385  if (alps_command_mode_read_reg(psmouse, 0x0163) == -1)
1386  goto error;
1387  if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03))
1388  goto error;
1389 
1390  if (alps_command_mode_read_reg(psmouse, 0x0162) == -1)
1391  goto error;
1392  if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04))
1393  goto error;
1394 
1395  /*
1396  * This ensures the trackstick packets are in the format
1397  * supported by this driver. If bit 1 isn't set the packet
1398  * format is different.
1399  */
1400  if (alps_command_mode_write_reg(psmouse, 0x0008, 0x82))
1401  goto error;
1402 
1403  alps_exit_command_mode(psmouse);
1404 
1405  /* Set rate and enable data reporting */
1406  param[0] = 0x64;
1407  if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1408  ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1409  psmouse_err(psmouse, "Failed to enable data reporting\n");
1410  return -1;
1411  }
1412 
1413  return 0;
1414 
1415 error_passthrough:
1416  /* Something failed while in passthrough mode, so try to get out */
1417  if (!alps_enter_command_mode(psmouse, NULL))
1418  alps_passthrough_mode_v3(psmouse, false);
1419 error:
1420  /*
1421  * Leaving the touchpad in command mode will essentially render
1422  * it unusable until the machine reboots, so exit it here just
1423  * to be safe
1424  */
1425  alps_exit_command_mode(psmouse);
1426  return -1;
1427 }
1428 
1429 /* Must be in command mode when calling this function */
1430 static int alps_absolute_mode_v4(struct psmouse *psmouse)
1431 {
1432  int reg_val;
1433 
1434  reg_val = alps_command_mode_read_reg(psmouse, 0x0004);
1435  if (reg_val == -1)
1436  return -1;
1437 
1438  reg_val |= 0x02;
1439  if (__alps_command_mode_write_reg(psmouse, reg_val))
1440  return -1;
1441 
1442  return 0;
1443 }
1444 
1445 static int alps_hw_init_v4(struct psmouse *psmouse)
1446 {
1447  struct alps_data *priv = psmouse->private;
1448  struct ps2dev *ps2dev = &psmouse->ps2dev;
1449  unsigned char param[4];
1450 
1451  priv->nibble_commands = alps_v4_nibble_commands;
1452  priv->addr_command = PSMOUSE_CMD_DISABLE;
1453 
1454  if (alps_enter_command_mode(psmouse, NULL))
1455  goto error;
1456 
1457  if (alps_absolute_mode_v4(psmouse)) {
1458  psmouse_err(psmouse, "Failed to enter absolute mode\n");
1459  goto error;
1460  }
1461 
1462  if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c))
1463  goto error;
1464 
1465  if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03))
1466  goto error;
1467 
1468  if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03))
1469  goto error;
1470 
1471  if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15))
1472  goto error;
1473 
1474  if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01))
1475  goto error;
1476 
1477  if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03))
1478  goto error;
1479 
1480  if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03))
1481  goto error;
1482 
1483  if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03))
1484  goto error;
1485 
1486  alps_exit_command_mode(psmouse);
1487 
1488  /*
1489  * This sequence changes the output from a 9-byte to an
1490  * 8-byte format. All the same data seems to be present,
1491  * just in a more compact format.
1492  */
1493  param[0] = 0xc8;
1494  param[1] = 0x64;
1495  param[2] = 0x50;
1496  if (ps2_command(ps2dev, &param[0], PSMOUSE_CMD_SETRATE) ||
1497  ps2_command(ps2dev, &param[1], PSMOUSE_CMD_SETRATE) ||
1498  ps2_command(ps2dev, &param[2], PSMOUSE_CMD_SETRATE) ||
1499  ps2_command(ps2dev, param, PSMOUSE_CMD_GETID))
1500  return -1;
1501 
1502  /* Set rate and enable data reporting */
1503  param[0] = 0x64;
1504  if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) ||
1505  ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) {
1506  psmouse_err(psmouse, "Failed to enable data reporting\n");
1507  return -1;
1508  }
1509 
1510  return 0;
1511 
1512 error:
1513  /*
1514  * Leaving the touchpad in command mode will essentially render
1515  * it unusable until the machine reboots, so exit it here just
1516  * to be safe
1517  */
1518  alps_exit_command_mode(psmouse);
1519  return -1;
1520 }
1521 
1522 static int alps_hw_init(struct psmouse *psmouse)
1523 {
1524  struct alps_data *priv = psmouse->private;
1525  const struct alps_model_info *model = priv->i;
1526  int ret = -1;
1527 
1528  switch (model->proto_version) {
1529  case ALPS_PROTO_V1:
1530  case ALPS_PROTO_V2:
1531  ret = alps_hw_init_v1_v2(psmouse);
1532  break;
1533  case ALPS_PROTO_V3:
1534  ret = alps_hw_init_v3(psmouse);
1535  break;
1536  case ALPS_PROTO_V4:
1537  ret = alps_hw_init_v4(psmouse);
1538  break;
1539  }
1540 
1541  return ret;
1542 }
1543 
1544 static int alps_reconnect(struct psmouse *psmouse)
1545 {
1546  const struct alps_model_info *model;
1547 
1548  psmouse_reset(psmouse);
1549 
1550  model = alps_get_model(psmouse, NULL);
1551  if (!model)
1552  return -1;
1553 
1554  return alps_hw_init(psmouse);
1555 }
1556 
1557 static void alps_disconnect(struct psmouse *psmouse)
1558 {
1559  struct alps_data *priv = psmouse->private;
1560 
1561  psmouse_reset(psmouse);
1562  del_timer_sync(&priv->timer);
1563  input_unregister_device(priv->dev2);
1564  kfree(priv);
1565 }
1566 
1567 int alps_init(struct psmouse *psmouse)
1568 {
1569  struct alps_data *priv;
1570  const struct alps_model_info *model;
1571  struct input_dev *dev1 = psmouse->dev, *dev2;
1572  int version;
1573 
1574  priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL);
1575  dev2 = input_allocate_device();
1576  if (!priv || !dev2)
1577  goto init_fail;
1578 
1579  priv->dev2 = dev2;
1580  setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse);
1581 
1582  psmouse->private = priv;
1583 
1584  psmouse_reset(psmouse);
1585 
1586  model = alps_get_model(psmouse, &version);
1587  if (!model)
1588  goto init_fail;
1589 
1590  priv->i = model;
1591 
1592  if (alps_hw_init(psmouse))
1593  goto init_fail;
1594 
1595  /*
1596  * Undo part of setup done for us by psmouse core since touchpad
1597  * is not a relative device.
1598  */
1599  __clear_bit(EV_REL, dev1->evbit);
1600  __clear_bit(REL_X, dev1->relbit);
1601  __clear_bit(REL_Y, dev1->relbit);
1602 
1603  /*
1604  * Now set up our capabilities.
1605  */
1606  dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY);
1607  dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH);
1608  dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER);
1609  dev1->keybit[BIT_WORD(BTN_LEFT)] |=
1610  BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT);
1611 
1612  dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS);
1613 
1614  switch (model->proto_version) {
1615  case ALPS_PROTO_V1:
1616  case ALPS_PROTO_V2:
1617  input_set_abs_params(dev1, ABS_X, 0, 1023, 0, 0);
1618  input_set_abs_params(dev1, ABS_Y, 0, 767, 0, 0);
1619  break;
1620  case ALPS_PROTO_V3:
1621  case ALPS_PROTO_V4:
1622  set_bit(INPUT_PROP_SEMI_MT, dev1->propbit);
1623  input_mt_init_slots(dev1, 2, 0);
1624  input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, ALPS_V3_X_MAX, 0, 0);
1625  input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, ALPS_V3_Y_MAX, 0, 0);
1626 
1627  set_bit(BTN_TOOL_DOUBLETAP, dev1->keybit);
1628  set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit);
1629  set_bit(BTN_TOOL_QUADTAP, dev1->keybit);
1630 
1631  input_set_abs_params(dev1, ABS_X, 0, ALPS_V3_X_MAX, 0, 0);
1632  input_set_abs_params(dev1, ABS_Y, 0, ALPS_V3_Y_MAX, 0, 0);
1633  break;
1634  }
1635 
1636  input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0);
1637 
1638  if (model->flags & ALPS_WHEEL) {
1639  dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL);
1640  dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL);
1641  }
1642 
1643  if (model->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) {
1644  dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD);
1645  dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK);
1646  }
1647 
1648  if (model->flags & ALPS_FOUR_BUTTONS) {
1649  dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0);
1650  dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1);
1651  dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2);
1652  dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3);
1653  } else {
1654  dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE);
1655  }
1656 
1657  snprintf(priv->phys, sizeof(priv->phys), "%s/input1", psmouse->ps2dev.serio->phys);
1658  dev2->phys = priv->phys;
1659  dev2->name = (model->flags & ALPS_DUALPOINT) ? "DualPoint Stick" : "PS/2 Mouse";
1660  dev2->id.bustype = BUS_I8042;
1661  dev2->id.vendor = 0x0002;
1662  dev2->id.product = PSMOUSE_ALPS;
1663  dev2->id.version = 0x0000;
1664  dev2->dev.parent = &psmouse->ps2dev.serio->dev;
1665 
1666  dev2->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
1667  dev2->relbit[BIT_WORD(REL_X)] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
1668  dev2->keybit[BIT_WORD(BTN_LEFT)] =
1669  BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_MIDDLE) | BIT_MASK(BTN_RIGHT);
1670 
1671  if (input_register_device(priv->dev2))
1672  goto init_fail;
1673 
1674  psmouse->protocol_handler = alps_process_byte;
1675  psmouse->poll = alps_poll;
1676  psmouse->disconnect = alps_disconnect;
1677  psmouse->reconnect = alps_reconnect;
1678  psmouse->pktsize = model->proto_version == ALPS_PROTO_V4 ? 8 : 6;
1679 
1680  /* We are having trouble resyncing ALPS touchpads so disable it for now */
1681  psmouse->resync_time = 0;
1682 
1683  return 0;
1684 
1685 init_fail:
1686  psmouse_reset(psmouse);
1687  input_free_device(dev2);
1688  kfree(priv);
1689  psmouse->private = NULL;
1690  return -1;
1691 }
1692 
1693 int alps_detect(struct psmouse *psmouse, bool set_properties)
1694 {
1695  int version;
1696  const struct alps_model_info *model;
1697 
1698  model = alps_get_model(psmouse, &version);
1699  if (!model)
1700  return -1;
1701 
1702  if (set_properties) {
1703  psmouse->vendor = "ALPS";
1704  psmouse->name = model->flags & ALPS_DUALPOINT ?
1705  "DualPoint TouchPad" : "GlidePoint";
1706  psmouse->model = version;
1707  }
1708  return 0;
1709 }
1710 
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