1 /* 2 * ALPS touchpad PS/2 mouse driver 3 * 4 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au> 5 * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com> 6 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru> 7 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> 8 * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net> 9 * 10 * ALPS detection, tap switching and status querying info is taken from 11 * tpconfig utility (by C. Scott Ananian and Bruce Kall). 12 * 13 * This program is free software; you can redistribute it and/or modify it 14 * under the terms of the GNU General Public License version 2 as published by 15 * the Free Software Foundation. 16 */ 17 18 #include <linux/slab.h> 19 #include <linux/input.h> 20 #include <linux/input/mt.h> 21 #include <linux/serio.h> 22 #include <linux/libps2.h> 23 #include <linux/dmi.h> 24 25 #include "psmouse.h" 26 #include "alps.h" 27 28 /* 29 * Definitions for ALPS version 3 and 4 command mode protocol 30 */ 31 #define ALPS_CMD_NIBBLE_10 0x01f2 32 33 #define ALPS_REG_BASE_RUSHMORE 0xc2c0 34 #define ALPS_REG_BASE_PINNACLE 0x0000 35 36 static const struct alps_nibble_commands alps_v3_nibble_commands[] = { 37 { PSMOUSE_CMD_SETPOLL, 0x00 }, /* 0 */ 38 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */ 39 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */ 40 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */ 41 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */ 42 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */ 43 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */ 44 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */ 45 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */ 46 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */ 47 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */ 48 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */ 49 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */ 50 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */ 51 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */ 52 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 53 }; 54 55 static const struct alps_nibble_commands alps_v4_nibble_commands[] = { 56 { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */ 57 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */ 58 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */ 59 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */ 60 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */ 61 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */ 62 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */ 63 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */ 64 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */ 65 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */ 66 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */ 67 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */ 68 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */ 69 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */ 70 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */ 71 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 72 }; 73 74 static const struct alps_nibble_commands alps_v6_nibble_commands[] = { 75 { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */ 76 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 1 */ 77 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 2 */ 78 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 3 */ 79 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 4 */ 80 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 5 */ 81 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 6 */ 82 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 7 */ 83 { PSMOUSE_CMD_GETID, 0x00 }, /* 8 */ 84 { PSMOUSE_CMD_GETINFO, 0x00 }, /* 9 */ 85 { PSMOUSE_CMD_SETRES, 0x00 }, /* a */ 86 { PSMOUSE_CMD_SETRES, 0x01 }, /* b */ 87 { PSMOUSE_CMD_SETRES, 0x02 }, /* c */ 88 { PSMOUSE_CMD_SETRES, 0x03 }, /* d */ 89 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* e */ 90 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 91 }; 92 93 94 #define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */ 95 #define ALPS_PASS 0x04 /* device has a pass-through port */ 96 97 #define ALPS_WHEEL 0x08 /* hardware wheel present */ 98 #define ALPS_FW_BK_1 0x10 /* front & back buttons present */ 99 #define ALPS_FW_BK_2 0x20 /* front & back buttons present */ 100 #define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */ 101 #define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with 102 6-byte ALPS packet */ 103 #define ALPS_DELL 0x100 /* device is a Dell laptop */ 104 #define ALPS_BUTTONPAD 0x200 /* device is a clickpad */ 105 106 static const struct alps_model_info alps_model_data[] = { 107 { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Toshiba Salellite Pro M10 */ 108 { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } }, /* UMAX-530T */ 109 { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 110 { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 111 { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, /* HP ze1115 */ 112 { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 113 { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 114 { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Fujitsu Siemens S6010 */ 115 { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } }, /* Toshiba Satellite S2400-103 */ 116 { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } }, /* NEC Versa L320 */ 117 { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 118 { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D800 */ 119 { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } }, /* ThinkPad R61 8918-5QG */ 120 { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 121 { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Ahtec Laptop */ 122 123 /* 124 * XXX This entry is suspicious. First byte has zero lower nibble, 125 * which is what a normal mouse would report. Also, the value 0x0e 126 * isn't valid per PS/2 spec. 127 */ 128 { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 129 130 { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 131 { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D600 */ 132 /* Dell Latitude E5500, E6400, E6500, Precision M4400 */ 133 { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, 134 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, 135 { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } }, /* Dell XT2 */ 136 { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } }, /* Dell Vostro 1400 */ 137 { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, 138 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Toshiba Tecra A11-11L */ 139 { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } }, 140 }; 141 142 static const struct alps_protocol_info alps_v3_protocol_data = { 143 ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT 144 }; 145 146 static const struct alps_protocol_info alps_v3_rushmore_data = { 147 ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT 148 }; 149 150 static const struct alps_protocol_info alps_v5_protocol_data = { 151 ALPS_PROTO_V5, 0xc8, 0xd8, 0 152 }; 153 154 static const struct alps_protocol_info alps_v7_protocol_data = { 155 ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT 156 }; 157 158 static const struct alps_protocol_info alps_v8_protocol_data = { 159 ALPS_PROTO_V8, 0x18, 0x18, 0 160 }; 161 162 static void alps_set_abs_params_st(struct alps_data *priv, 163 struct input_dev *dev1); 164 static void alps_set_abs_params_semi_mt(struct alps_data *priv, 165 struct input_dev *dev1); 166 static void alps_set_abs_params_v7(struct alps_data *priv, 167 struct input_dev *dev1); 168 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 169 struct input_dev *dev1); 170 171 /* Packet formats are described in Documentation/input/alps.txt */ 172 173 static bool alps_is_valid_first_byte(struct alps_data *priv, 174 unsigned char data) 175 { 176 return (data & priv->mask0) == priv->byte0; 177 } 178 179 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2, 180 int left, int right, int middle) 181 { 182 struct input_dev *dev; 183 184 /* 185 * If shared button has already been reported on the 186 * other device (dev2) then this event should be also 187 * sent through that device. 188 */ 189 dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1; 190 input_report_key(dev, BTN_LEFT, left); 191 192 dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1; 193 input_report_key(dev, BTN_RIGHT, right); 194 195 dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1; 196 input_report_key(dev, BTN_MIDDLE, middle); 197 198 /* 199 * Sync the _other_ device now, we'll do the first 200 * device later once we report the rest of the events. 201 */ 202 if (dev2) 203 input_sync(dev2); 204 } 205 206 static void alps_process_packet_v1_v2(struct psmouse *psmouse) 207 { 208 struct alps_data *priv = psmouse->private; 209 unsigned char *packet = psmouse->packet; 210 struct input_dev *dev = psmouse->dev; 211 struct input_dev *dev2 = priv->dev2; 212 int x, y, z, ges, fin, left, right, middle; 213 int back = 0, forward = 0; 214 215 if (priv->proto_version == ALPS_PROTO_V1) { 216 left = packet[2] & 0x10; 217 right = packet[2] & 0x08; 218 middle = 0; 219 x = packet[1] | ((packet[0] & 0x07) << 7); 220 y = packet[4] | ((packet[3] & 0x07) << 7); 221 z = packet[5]; 222 } else { 223 left = packet[3] & 1; 224 right = packet[3] & 2; 225 middle = packet[3] & 4; 226 x = packet[1] | ((packet[2] & 0x78) << (7 - 3)); 227 y = packet[4] | ((packet[3] & 0x70) << (7 - 4)); 228 z = packet[5]; 229 } 230 231 if (priv->flags & ALPS_FW_BK_1) { 232 back = packet[0] & 0x10; 233 forward = packet[2] & 4; 234 } 235 236 if (priv->flags & ALPS_FW_BK_2) { 237 back = packet[3] & 4; 238 forward = packet[2] & 4; 239 if ((middle = forward && back)) 240 forward = back = 0; 241 } 242 243 ges = packet[2] & 1; 244 fin = packet[2] & 2; 245 246 if ((priv->flags & ALPS_DUALPOINT) && z == 127) { 247 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x)); 248 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y)); 249 250 alps_report_buttons(dev2, dev, left, right, middle); 251 252 input_sync(dev2); 253 return; 254 } 255 256 /* Dell non interleaved V2 dualpoint has separate stick button bits */ 257 if (priv->proto_version == ALPS_PROTO_V2 && 258 priv->flags == (ALPS_DELL | ALPS_PASS | ALPS_DUALPOINT)) { 259 left |= packet[0] & 1; 260 right |= packet[0] & 2; 261 middle |= packet[0] & 4; 262 } 263 264 alps_report_buttons(dev, dev2, left, right, middle); 265 266 /* Convert hardware tap to a reasonable Z value */ 267 if (ges && !fin) 268 z = 40; 269 270 /* 271 * A "tap and drag" operation is reported by the hardware as a transition 272 * from (!fin && ges) to (fin && ges). This should be translated to the 273 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually. 274 */ 275 if (ges && fin && !priv->prev_fin) { 276 input_report_abs(dev, ABS_X, x); 277 input_report_abs(dev, ABS_Y, y); 278 input_report_abs(dev, ABS_PRESSURE, 0); 279 input_report_key(dev, BTN_TOOL_FINGER, 0); 280 input_sync(dev); 281 } 282 priv->prev_fin = fin; 283 284 if (z > 30) 285 input_report_key(dev, BTN_TOUCH, 1); 286 if (z < 25) 287 input_report_key(dev, BTN_TOUCH, 0); 288 289 if (z > 0) { 290 input_report_abs(dev, ABS_X, x); 291 input_report_abs(dev, ABS_Y, y); 292 } 293 294 input_report_abs(dev, ABS_PRESSURE, z); 295 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 296 297 if (priv->flags & ALPS_WHEEL) 298 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07)); 299 300 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 301 input_report_key(dev, BTN_FORWARD, forward); 302 input_report_key(dev, BTN_BACK, back); 303 } 304 305 if (priv->flags & ALPS_FOUR_BUTTONS) { 306 input_report_key(dev, BTN_0, packet[2] & 4); 307 input_report_key(dev, BTN_1, packet[0] & 0x10); 308 input_report_key(dev, BTN_2, packet[3] & 4); 309 input_report_key(dev, BTN_3, packet[0] & 0x20); 310 } 311 312 input_sync(dev); 313 } 314 315 static void alps_get_bitmap_points(unsigned int map, 316 struct alps_bitmap_point *low, 317 struct alps_bitmap_point *high, 318 int *fingers) 319 { 320 struct alps_bitmap_point *point; 321 int i, bit, prev_bit = 0; 322 323 point = low; 324 for (i = 0; map != 0; i++, map >>= 1) { 325 bit = map & 1; 326 if (bit) { 327 if (!prev_bit) { 328 point->start_bit = i; 329 point->num_bits = 0; 330 (*fingers)++; 331 } 332 point->num_bits++; 333 } else { 334 if (prev_bit) 335 point = high; 336 } 337 prev_bit = bit; 338 } 339 } 340 341 /* 342 * Process bitmap data from semi-mt protocols. Returns the number of 343 * fingers detected. A return value of 0 means at least one of the 344 * bitmaps was empty. 345 * 346 * The bitmaps don't have enough data to track fingers, so this function 347 * only generates points representing a bounding box of all contacts. 348 * These points are returned in fields->mt when the return value 349 * is greater than 0. 350 */ 351 static int alps_process_bitmap(struct alps_data *priv, 352 struct alps_fields *fields) 353 { 354 int i, fingers_x = 0, fingers_y = 0, fingers, closest; 355 struct alps_bitmap_point x_low = {0,}, x_high = {0,}; 356 struct alps_bitmap_point y_low = {0,}, y_high = {0,}; 357 struct input_mt_pos corner[4]; 358 359 if (!fields->x_map || !fields->y_map) 360 return 0; 361 362 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x); 363 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y); 364 365 /* 366 * Fingers can overlap, so we use the maximum count of fingers 367 * on either axis as the finger count. 368 */ 369 fingers = max(fingers_x, fingers_y); 370 371 /* 372 * If an axis reports only a single contact, we have overlapping or 373 * adjacent fingers. Divide the single contact between the two points. 374 */ 375 if (fingers_x == 1) { 376 i = (x_low.num_bits - 1) / 2; 377 x_low.num_bits = x_low.num_bits - i; 378 x_high.start_bit = x_low.start_bit + i; 379 x_high.num_bits = max(i, 1); 380 } 381 if (fingers_y == 1) { 382 i = (y_low.num_bits - 1) / 2; 383 y_low.num_bits = y_low.num_bits - i; 384 y_high.start_bit = y_low.start_bit + i; 385 y_high.num_bits = max(i, 1); 386 } 387 388 /* top-left corner */ 389 corner[0].x = 390 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) / 391 (2 * (priv->x_bits - 1)); 392 corner[0].y = 393 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) / 394 (2 * (priv->y_bits - 1)); 395 396 /* top-right corner */ 397 corner[1].x = 398 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) / 399 (2 * (priv->x_bits - 1)); 400 corner[1].y = 401 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) / 402 (2 * (priv->y_bits - 1)); 403 404 /* bottom-right corner */ 405 corner[2].x = 406 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) / 407 (2 * (priv->x_bits - 1)); 408 corner[2].y = 409 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) / 410 (2 * (priv->y_bits - 1)); 411 412 /* bottom-left corner */ 413 corner[3].x = 414 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) / 415 (2 * (priv->x_bits - 1)); 416 corner[3].y = 417 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) / 418 (2 * (priv->y_bits - 1)); 419 420 /* x-bitmap order is reversed on v5 touchpads */ 421 if (priv->proto_version == ALPS_PROTO_V5) { 422 for (i = 0; i < 4; i++) 423 corner[i].x = priv->x_max - corner[i].x; 424 } 425 426 /* y-bitmap order is reversed on v3 and v4 touchpads */ 427 if (priv->proto_version == ALPS_PROTO_V3 || 428 priv->proto_version == ALPS_PROTO_V4) { 429 for (i = 0; i < 4; i++) 430 corner[i].y = priv->y_max - corner[i].y; 431 } 432 433 /* 434 * We only select a corner for the second touch once per 2 finger 435 * touch sequence to avoid the chosen corner (and thus the coordinates) 436 * jumping around when the first touch is in the middle. 437 */ 438 if (priv->second_touch == -1) { 439 /* Find corner closest to our st coordinates */ 440 closest = 0x7fffffff; 441 for (i = 0; i < 4; i++) { 442 int dx = fields->st.x - corner[i].x; 443 int dy = fields->st.y - corner[i].y; 444 int distance = dx * dx + dy * dy; 445 446 if (distance < closest) { 447 priv->second_touch = i; 448 closest = distance; 449 } 450 } 451 /* And select the opposite corner to use for the 2nd touch */ 452 priv->second_touch = (priv->second_touch + 2) % 4; 453 } 454 455 fields->mt[0] = fields->st; 456 fields->mt[1] = corner[priv->second_touch]; 457 458 return fingers; 459 } 460 461 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y) 462 { 463 input_mt_slot(dev, slot); 464 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 465 input_report_abs(dev, ABS_MT_POSITION_X, x); 466 input_report_abs(dev, ABS_MT_POSITION_Y, y); 467 } 468 469 static void alps_report_mt_data(struct psmouse *psmouse, int n) 470 { 471 struct alps_data *priv = psmouse->private; 472 struct input_dev *dev = psmouse->dev; 473 struct alps_fields *f = &priv->f; 474 int i, slot[MAX_TOUCHES]; 475 476 input_mt_assign_slots(dev, slot, f->mt, n, 0); 477 for (i = 0; i < n; i++) 478 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y); 479 480 input_mt_sync_frame(dev); 481 } 482 483 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers) 484 { 485 struct alps_data *priv = psmouse->private; 486 struct input_dev *dev = psmouse->dev; 487 struct alps_fields *f = &priv->f; 488 489 /* Use st data when we don't have mt data */ 490 if (fingers < 2) { 491 f->mt[0].x = f->st.x; 492 f->mt[0].y = f->st.y; 493 fingers = f->pressure > 0 ? 1 : 0; 494 priv->second_touch = -1; 495 } 496 497 if (fingers >= 1) 498 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y); 499 if (fingers >= 2) 500 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y); 501 input_mt_sync_frame(dev); 502 503 input_mt_report_finger_count(dev, fingers); 504 505 input_report_key(dev, BTN_LEFT, f->left); 506 input_report_key(dev, BTN_RIGHT, f->right); 507 input_report_key(dev, BTN_MIDDLE, f->middle); 508 509 input_report_abs(dev, ABS_PRESSURE, f->pressure); 510 511 input_sync(dev); 512 } 513 514 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse) 515 { 516 struct alps_data *priv = psmouse->private; 517 unsigned char *packet = psmouse->packet; 518 struct input_dev *dev = priv->dev2; 519 int x, y, z, left, right, middle; 520 521 /* It should be a DualPoint when received trackstick packet */ 522 if (!(priv->flags & ALPS_DUALPOINT)) { 523 psmouse_warn(psmouse, 524 "Rejected trackstick packet from non DualPoint device"); 525 return; 526 } 527 528 /* Sanity check packet */ 529 if (!(packet[0] & 0x40)) { 530 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n"); 531 return; 532 } 533 534 /* 535 * There's a special packet that seems to indicate the end 536 * of a stream of trackstick data. Filter these out. 537 */ 538 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f) 539 return; 540 541 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f)); 542 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f)); 543 z = (packet[4] & 0x7c) >> 2; 544 545 /* 546 * The x and y values tend to be quite large, and when used 547 * alone the trackstick is difficult to use. Scale them down 548 * to compensate. 549 */ 550 x /= 8; 551 y /= 8; 552 553 input_report_rel(dev, REL_X, x); 554 input_report_rel(dev, REL_Y, -y); 555 556 /* 557 * Most ALPS models report the trackstick buttons in the touchpad 558 * packets, but a few report them here. No reliable way has been 559 * found to differentiate between the models upfront, so we enable 560 * the quirk in response to seeing a button press in the trackstick 561 * packet. 562 */ 563 left = packet[3] & 0x01; 564 right = packet[3] & 0x02; 565 middle = packet[3] & 0x04; 566 567 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) && 568 (left || right || middle)) 569 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS; 570 571 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) { 572 input_report_key(dev, BTN_LEFT, left); 573 input_report_key(dev, BTN_RIGHT, right); 574 input_report_key(dev, BTN_MIDDLE, middle); 575 } 576 577 input_sync(dev); 578 return; 579 } 580 581 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p) 582 { 583 f->left = !!(p[3] & 0x01); 584 f->right = !!(p[3] & 0x02); 585 f->middle = !!(p[3] & 0x04); 586 587 f->ts_left = !!(p[3] & 0x10); 588 f->ts_right = !!(p[3] & 0x20); 589 f->ts_middle = !!(p[3] & 0x40); 590 } 591 592 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p, 593 struct psmouse *psmouse) 594 { 595 f->first_mp = !!(p[4] & 0x40); 596 f->is_mp = !!(p[0] & 0x40); 597 598 if (f->is_mp) { 599 f->fingers = (p[5] & 0x3) + 1; 600 f->x_map = ((p[4] & 0x7e) << 8) | 601 ((p[1] & 0x7f) << 2) | 602 ((p[0] & 0x30) >> 4); 603 f->y_map = ((p[3] & 0x70) << 4) | 604 ((p[2] & 0x7f) << 1) | 605 (p[4] & 0x01); 606 } else { 607 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) | 608 ((p[0] & 0x30) >> 4); 609 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f); 610 f->pressure = p[5] & 0x7f; 611 612 alps_decode_buttons_v3(f, p); 613 } 614 615 return 0; 616 } 617 618 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p, 619 struct psmouse *psmouse) 620 { 621 f->first_mp = !!(p[4] & 0x40); 622 f->is_mp = !!(p[5] & 0x40); 623 624 if (f->is_mp) { 625 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1; 626 f->x_map = ((p[5] & 0x10) << 11) | 627 ((p[4] & 0x7e) << 8) | 628 ((p[1] & 0x7f) << 2) | 629 ((p[0] & 0x30) >> 4); 630 f->y_map = ((p[5] & 0x20) << 6) | 631 ((p[3] & 0x70) << 4) | 632 ((p[2] & 0x7f) << 1) | 633 (p[4] & 0x01); 634 } else { 635 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) | 636 ((p[0] & 0x30) >> 4); 637 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f); 638 f->pressure = p[5] & 0x7f; 639 640 alps_decode_buttons_v3(f, p); 641 } 642 643 return 0; 644 } 645 646 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p, 647 struct psmouse *psmouse) 648 { 649 u64 palm_data = 0; 650 struct alps_data *priv = psmouse->private; 651 652 f->first_mp = !!(p[0] & 0x02); 653 f->is_mp = !!(p[0] & 0x20); 654 655 if (!f->is_mp) { 656 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7)); 657 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3)); 658 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f; 659 alps_decode_buttons_v3(f, p); 660 } else { 661 f->fingers = ((p[0] & 0x6) >> 1 | 662 (p[0] & 0x10) >> 2); 663 664 palm_data = (p[1] & 0x7f) | 665 ((p[2] & 0x7f) << 7) | 666 ((p[4] & 0x7f) << 14) | 667 ((p[5] & 0x7f) << 21) | 668 ((p[3] & 0x07) << 28) | 669 (((u64)p[3] & 0x70) << 27) | 670 (((u64)p[0] & 0x01) << 34); 671 672 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */ 673 f->y_map = palm_data & (BIT(priv->y_bits) - 1); 674 675 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */ 676 f->x_map = (palm_data >> priv->y_bits) & 677 (BIT(priv->x_bits) - 1); 678 } 679 680 return 0; 681 } 682 683 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse) 684 { 685 struct alps_data *priv = psmouse->private; 686 unsigned char *packet = psmouse->packet; 687 struct input_dev *dev2 = priv->dev2; 688 struct alps_fields *f = &priv->f; 689 int fingers = 0; 690 691 memset(f, 0, sizeof(*f)); 692 693 priv->decode_fields(f, packet, psmouse); 694 695 /* 696 * There's no single feature of touchpad position and bitmap packets 697 * that can be used to distinguish between them. We rely on the fact 698 * that a bitmap packet should always follow a position packet with 699 * bit 6 of packet[4] set. 700 */ 701 if (priv->multi_packet) { 702 /* 703 * Sometimes a position packet will indicate a multi-packet 704 * sequence, but then what follows is another position 705 * packet. Check for this, and when it happens process the 706 * position packet as usual. 707 */ 708 if (f->is_mp) { 709 fingers = f->fingers; 710 /* 711 * Bitmap processing uses position packet's coordinate 712 * data, so we need to do decode it first. 713 */ 714 priv->decode_fields(f, priv->multi_data, psmouse); 715 if (alps_process_bitmap(priv, f) == 0) 716 fingers = 0; /* Use st data */ 717 } else { 718 priv->multi_packet = 0; 719 } 720 } 721 722 /* 723 * Bit 6 of byte 0 is not usually set in position packets. The only 724 * times it seems to be set is in situations where the data is 725 * suspect anyway, e.g. a palm resting flat on the touchpad. Given 726 * this combined with the fact that this bit is useful for filtering 727 * out misidentified bitmap packets, we reject anything with this 728 * bit set. 729 */ 730 if (f->is_mp) 731 return; 732 733 if (!priv->multi_packet && f->first_mp) { 734 priv->multi_packet = 1; 735 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 736 return; 737 } 738 739 priv->multi_packet = 0; 740 741 /* 742 * Sometimes the hardware sends a single packet with z = 0 743 * in the middle of a stream. Real releases generate packets 744 * with x, y, and z all zero, so these seem to be flukes. 745 * Ignore them. 746 */ 747 if (f->st.x && f->st.y && !f->pressure) 748 return; 749 750 alps_report_semi_mt_data(psmouse, fingers); 751 752 if ((priv->flags & ALPS_DUALPOINT) && 753 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) { 754 input_report_key(dev2, BTN_LEFT, f->ts_left); 755 input_report_key(dev2, BTN_RIGHT, f->ts_right); 756 input_report_key(dev2, BTN_MIDDLE, f->ts_middle); 757 input_sync(dev2); 758 } 759 } 760 761 static void alps_process_packet_v3(struct psmouse *psmouse) 762 { 763 unsigned char *packet = psmouse->packet; 764 765 /* 766 * v3 protocol packets come in three types, two representing 767 * touchpad data and one representing trackstick data. 768 * Trackstick packets seem to be distinguished by always 769 * having 0x3f in the last byte. This value has never been 770 * observed in the last byte of either of the other types 771 * of packets. 772 */ 773 if (packet[5] == 0x3f) { 774 alps_process_trackstick_packet_v3(psmouse); 775 return; 776 } 777 778 alps_process_touchpad_packet_v3_v5(psmouse); 779 } 780 781 static void alps_process_packet_v6(struct psmouse *psmouse) 782 { 783 struct alps_data *priv = psmouse->private; 784 unsigned char *packet = psmouse->packet; 785 struct input_dev *dev = psmouse->dev; 786 struct input_dev *dev2 = priv->dev2; 787 int x, y, z, left, right, middle; 788 789 /* 790 * We can use Byte5 to distinguish if the packet is from Touchpad 791 * or Trackpoint. 792 * Touchpad: 0 - 0x7E 793 * Trackpoint: 0x7F 794 */ 795 if (packet[5] == 0x7F) { 796 /* It should be a DualPoint when received Trackpoint packet */ 797 if (!(priv->flags & ALPS_DUALPOINT)) { 798 psmouse_warn(psmouse, 799 "Rejected trackstick packet from non DualPoint device"); 800 return; 801 } 802 803 /* Trackpoint packet */ 804 x = packet[1] | ((packet[3] & 0x20) << 2); 805 y = packet[2] | ((packet[3] & 0x40) << 1); 806 z = packet[4]; 807 left = packet[3] & 0x01; 808 right = packet[3] & 0x02; 809 middle = packet[3] & 0x04; 810 811 /* To prevent the cursor jump when finger lifted */ 812 if (x == 0x7F && y == 0x7F && z == 0x7F) 813 x = y = z = 0; 814 815 /* Divide 4 since trackpoint's speed is too fast */ 816 input_report_rel(dev2, REL_X, (char)x / 4); 817 input_report_rel(dev2, REL_Y, -((char)y / 4)); 818 819 input_report_key(dev2, BTN_LEFT, left); 820 input_report_key(dev2, BTN_RIGHT, right); 821 input_report_key(dev2, BTN_MIDDLE, middle); 822 823 input_sync(dev2); 824 return; 825 } 826 827 /* Touchpad packet */ 828 x = packet[1] | ((packet[3] & 0x78) << 4); 829 y = packet[2] | ((packet[4] & 0x78) << 4); 830 z = packet[5]; 831 left = packet[3] & 0x01; 832 right = packet[3] & 0x02; 833 834 if (z > 30) 835 input_report_key(dev, BTN_TOUCH, 1); 836 if (z < 25) 837 input_report_key(dev, BTN_TOUCH, 0); 838 839 if (z > 0) { 840 input_report_abs(dev, ABS_X, x); 841 input_report_abs(dev, ABS_Y, y); 842 } 843 844 input_report_abs(dev, ABS_PRESSURE, z); 845 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 846 847 /* v6 touchpad does not have middle button */ 848 input_report_key(dev, BTN_LEFT, left); 849 input_report_key(dev, BTN_RIGHT, right); 850 851 input_sync(dev); 852 } 853 854 static void alps_process_packet_v4(struct psmouse *psmouse) 855 { 856 struct alps_data *priv = psmouse->private; 857 unsigned char *packet = psmouse->packet; 858 struct alps_fields *f = &priv->f; 859 int offset; 860 861 /* 862 * v4 has a 6-byte encoding for bitmap data, but this data is 863 * broken up between 3 normal packets. Use priv->multi_packet to 864 * track our position in the bitmap packet. 865 */ 866 if (packet[6] & 0x40) { 867 /* sync, reset position */ 868 priv->multi_packet = 0; 869 } 870 871 if (WARN_ON_ONCE(priv->multi_packet > 2)) 872 return; 873 874 offset = 2 * priv->multi_packet; 875 priv->multi_data[offset] = packet[6]; 876 priv->multi_data[offset + 1] = packet[7]; 877 878 f->left = !!(packet[4] & 0x01); 879 f->right = !!(packet[4] & 0x02); 880 881 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) | 882 ((packet[0] & 0x30) >> 4); 883 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f); 884 f->pressure = packet[5] & 0x7f; 885 886 if (++priv->multi_packet > 2) { 887 priv->multi_packet = 0; 888 889 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) | 890 ((priv->multi_data[3] & 0x60) << 3) | 891 ((priv->multi_data[0] & 0x3f) << 2) | 892 ((priv->multi_data[1] & 0x60) >> 5); 893 f->y_map = ((priv->multi_data[5] & 0x01) << 10) | 894 ((priv->multi_data[3] & 0x1f) << 5) | 895 (priv->multi_data[1] & 0x1f); 896 897 f->fingers = alps_process_bitmap(priv, f); 898 } 899 900 alps_report_semi_mt_data(psmouse, f->fingers); 901 } 902 903 static bool alps_is_valid_package_v7(struct psmouse *psmouse) 904 { 905 switch (psmouse->pktcnt) { 906 case 3: 907 return (psmouse->packet[2] & 0x40) == 0x40; 908 case 4: 909 return (psmouse->packet[3] & 0x48) == 0x48; 910 case 6: 911 return (psmouse->packet[5] & 0x40) == 0x00; 912 } 913 return true; 914 } 915 916 static unsigned char alps_get_packet_id_v7(char *byte) 917 { 918 unsigned char packet_id; 919 920 if (byte[4] & 0x40) 921 packet_id = V7_PACKET_ID_TWO; 922 else if (byte[4] & 0x01) 923 packet_id = V7_PACKET_ID_MULTI; 924 else if ((byte[0] & 0x10) && !(byte[4] & 0x43)) 925 packet_id = V7_PACKET_ID_NEW; 926 else if (byte[1] == 0x00 && byte[4] == 0x00) 927 packet_id = V7_PACKET_ID_IDLE; 928 else 929 packet_id = V7_PACKET_ID_UNKNOWN; 930 931 return packet_id; 932 } 933 934 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt, 935 unsigned char *pkt, 936 unsigned char pkt_id) 937 { 938 mt[0].x = ((pkt[2] & 0x80) << 4); 939 mt[0].x |= ((pkt[2] & 0x3F) << 5); 940 mt[0].x |= ((pkt[3] & 0x30) >> 1); 941 mt[0].x |= (pkt[3] & 0x07); 942 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07); 943 944 mt[1].x = ((pkt[3] & 0x80) << 4); 945 mt[1].x |= ((pkt[4] & 0x80) << 3); 946 mt[1].x |= ((pkt[4] & 0x3F) << 4); 947 mt[1].y = ((pkt[5] & 0x80) << 3); 948 mt[1].y |= ((pkt[5] & 0x3F) << 4); 949 950 switch (pkt_id) { 951 case V7_PACKET_ID_TWO: 952 mt[1].x &= ~0x000F; 953 mt[1].y |= 0x000F; 954 /* Detect false-postive touches where x & y report max value */ 955 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) { 956 mt[1].x = 0; 957 /* y gets set to 0 at the end of this function */ 958 } 959 break; 960 961 case V7_PACKET_ID_MULTI: 962 mt[1].x &= ~0x003F; 963 mt[1].y &= ~0x0020; 964 mt[1].y |= ((pkt[4] & 0x02) << 4); 965 mt[1].y |= 0x001F; 966 break; 967 968 case V7_PACKET_ID_NEW: 969 mt[1].x &= ~0x003F; 970 mt[1].x |= (pkt[0] & 0x20); 971 mt[1].y |= 0x000F; 972 break; 973 } 974 975 mt[0].y = 0x7FF - mt[0].y; 976 mt[1].y = 0x7FF - mt[1].y; 977 } 978 979 static int alps_get_mt_count(struct input_mt_pos *mt) 980 { 981 int i, fingers = 0; 982 983 for (i = 0; i < MAX_TOUCHES; i++) { 984 if (mt[i].x != 0 || mt[i].y != 0) 985 fingers++; 986 } 987 988 return fingers; 989 } 990 991 static int alps_decode_packet_v7(struct alps_fields *f, 992 unsigned char *p, 993 struct psmouse *psmouse) 994 { 995 struct alps_data *priv = psmouse->private; 996 unsigned char pkt_id; 997 998 pkt_id = alps_get_packet_id_v7(p); 999 if (pkt_id == V7_PACKET_ID_IDLE) 1000 return 0; 1001 if (pkt_id == V7_PACKET_ID_UNKNOWN) 1002 return -1; 1003 /* 1004 * NEW packets are send to indicate a discontinuity in the finger 1005 * coordinate reporting. Specifically a finger may have moved from 1006 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for 1007 * us. 1008 * 1009 * NEW packets have 3 problems: 1010 * 1) They do not contain middle / right button info (on non clickpads) 1011 * this can be worked around by preserving the old button state 1012 * 2) They do not contain an accurate fingercount, and they are 1013 * typically send when the number of fingers changes. We cannot use 1014 * the old finger count as that may mismatch with the amount of 1015 * touch coordinates we've available in the NEW packet 1016 * 3) Their x data for the second touch is inaccurate leading to 1017 * a possible jump of the x coordinate by 16 units when the first 1018 * non NEW packet comes in 1019 * Since problems 2 & 3 cannot be worked around, just ignore them. 1020 */ 1021 if (pkt_id == V7_PACKET_ID_NEW) 1022 return 1; 1023 1024 alps_get_finger_coordinate_v7(f->mt, p, pkt_id); 1025 1026 if (pkt_id == V7_PACKET_ID_TWO) 1027 f->fingers = alps_get_mt_count(f->mt); 1028 else /* pkt_id == V7_PACKET_ID_MULTI */ 1029 f->fingers = 3 + (p[5] & 0x03); 1030 1031 f->left = (p[0] & 0x80) >> 7; 1032 if (priv->flags & ALPS_BUTTONPAD) { 1033 if (p[0] & 0x20) 1034 f->fingers++; 1035 if (p[0] & 0x10) 1036 f->fingers++; 1037 } else { 1038 f->right = (p[0] & 0x20) >> 5; 1039 f->middle = (p[0] & 0x10) >> 4; 1040 } 1041 1042 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */ 1043 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) { 1044 f->mt[0].x = f->mt[1].x; 1045 f->mt[0].y = f->mt[1].y; 1046 f->mt[1].x = 0; 1047 f->mt[1].y = 0; 1048 } 1049 1050 return 0; 1051 } 1052 1053 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse) 1054 { 1055 struct alps_data *priv = psmouse->private; 1056 unsigned char *packet = psmouse->packet; 1057 struct input_dev *dev2 = priv->dev2; 1058 int x, y, z, left, right, middle; 1059 1060 /* It should be a DualPoint when received trackstick packet */ 1061 if (!(priv->flags & ALPS_DUALPOINT)) { 1062 psmouse_warn(psmouse, 1063 "Rejected trackstick packet from non DualPoint device"); 1064 return; 1065 } 1066 1067 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2); 1068 y = (packet[3] & 0x07) | (packet[4] & 0xb8) | 1069 ((packet[3] & 0x20) << 1); 1070 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1); 1071 1072 left = (packet[1] & 0x01); 1073 right = (packet[1] & 0x02) >> 1; 1074 middle = (packet[1] & 0x04) >> 2; 1075 1076 input_report_rel(dev2, REL_X, (char)x); 1077 input_report_rel(dev2, REL_Y, -((char)y)); 1078 1079 input_report_key(dev2, BTN_LEFT, left); 1080 input_report_key(dev2, BTN_RIGHT, right); 1081 input_report_key(dev2, BTN_MIDDLE, middle); 1082 1083 input_sync(dev2); 1084 } 1085 1086 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse) 1087 { 1088 struct alps_data *priv = psmouse->private; 1089 struct input_dev *dev = psmouse->dev; 1090 struct alps_fields *f = &priv->f; 1091 1092 memset(f, 0, sizeof(*f)); 1093 1094 if (priv->decode_fields(f, psmouse->packet, psmouse)) 1095 return; 1096 1097 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt)); 1098 1099 input_mt_report_finger_count(dev, f->fingers); 1100 1101 input_report_key(dev, BTN_LEFT, f->left); 1102 input_report_key(dev, BTN_RIGHT, f->right); 1103 input_report_key(dev, BTN_MIDDLE, f->middle); 1104 1105 input_sync(dev); 1106 } 1107 1108 static void alps_process_packet_v7(struct psmouse *psmouse) 1109 { 1110 unsigned char *packet = psmouse->packet; 1111 1112 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06) 1113 alps_process_trackstick_packet_v7(psmouse); 1114 else 1115 alps_process_touchpad_packet_v7(psmouse); 1116 } 1117 1118 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte) 1119 { 1120 unsigned char pkt_id = SS4_PACKET_ID_IDLE; 1121 1122 if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 && 1123 (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) { 1124 pkt_id = SS4_PACKET_ID_IDLE; 1125 } else if (!(byte[3] & 0x10)) { 1126 pkt_id = SS4_PACKET_ID_ONE; 1127 } else if (!(byte[3] & 0x20)) { 1128 pkt_id = SS4_PACKET_ID_TWO; 1129 } else { 1130 pkt_id = SS4_PACKET_ID_MULTI; 1131 } 1132 1133 return pkt_id; 1134 } 1135 1136 static int alps_decode_ss4_v2(struct alps_fields *f, 1137 unsigned char *p, struct psmouse *psmouse) 1138 { 1139 struct alps_data *priv = psmouse->private; 1140 unsigned char pkt_id; 1141 unsigned int no_data_x, no_data_y; 1142 1143 pkt_id = alps_get_pkt_id_ss4_v2(p); 1144 1145 /* Current packet is 1Finger coordinate packet */ 1146 switch (pkt_id) { 1147 case SS4_PACKET_ID_ONE: 1148 f->mt[0].x = SS4_1F_X_V2(p); 1149 f->mt[0].y = SS4_1F_Y_V2(p); 1150 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f; 1151 f->fingers = 1; 1152 f->first_mp = 0; 1153 f->is_mp = 0; 1154 break; 1155 1156 case SS4_PACKET_ID_TWO: 1157 if (priv->flags & ALPS_BUTTONPAD) { 1158 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0); 1159 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0); 1160 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1); 1161 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1); 1162 } else { 1163 f->mt[0].x = SS4_STD_MF_X_V2(p, 0); 1164 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0); 1165 f->mt[1].x = SS4_STD_MF_X_V2(p, 1); 1166 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1); 1167 } 1168 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0; 1169 1170 if (SS4_IS_MF_CONTINUE(p)) { 1171 f->first_mp = 1; 1172 } else { 1173 f->fingers = 2; 1174 f->first_mp = 0; 1175 } 1176 f->is_mp = 0; 1177 1178 break; 1179 1180 case SS4_PACKET_ID_MULTI: 1181 if (priv->flags & ALPS_BUTTONPAD) { 1182 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0); 1183 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0); 1184 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1); 1185 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1); 1186 no_data_x = SS4_MFPACKET_NO_AX_BL; 1187 no_data_y = SS4_MFPACKET_NO_AY_BL; 1188 } else { 1189 f->mt[2].x = SS4_STD_MF_X_V2(p, 0); 1190 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0); 1191 f->mt[3].x = SS4_STD_MF_X_V2(p, 1); 1192 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1); 1193 no_data_x = SS4_MFPACKET_NO_AX; 1194 no_data_y = SS4_MFPACKET_NO_AY; 1195 } 1196 1197 f->first_mp = 0; 1198 f->is_mp = 1; 1199 1200 if (SS4_IS_5F_DETECTED(p)) { 1201 f->fingers = 5; 1202 } else if (f->mt[3].x == no_data_x && 1203 f->mt[3].y == no_data_y) { 1204 f->mt[3].x = 0; 1205 f->mt[3].y = 0; 1206 f->fingers = 3; 1207 } else { 1208 f->fingers = 4; 1209 } 1210 break; 1211 1212 case SS4_PACKET_ID_IDLE: 1213 default: 1214 memset(f, 0, sizeof(struct alps_fields)); 1215 break; 1216 } 1217 1218 f->left = !!(SS4_BTN_V2(p) & 0x01); 1219 if (!(priv->flags & ALPS_BUTTONPAD)) { 1220 f->right = !!(SS4_BTN_V2(p) & 0x02); 1221 f->middle = !!(SS4_BTN_V2(p) & 0x04); 1222 } 1223 1224 return 0; 1225 } 1226 1227 static void alps_process_packet_ss4_v2(struct psmouse *psmouse) 1228 { 1229 struct alps_data *priv = psmouse->private; 1230 unsigned char *packet = psmouse->packet; 1231 struct input_dev *dev = psmouse->dev; 1232 struct alps_fields *f = &priv->f; 1233 1234 memset(f, 0, sizeof(struct alps_fields)); 1235 priv->decode_fields(f, packet, psmouse); 1236 if (priv->multi_packet) { 1237 /* 1238 * Sometimes the first packet will indicate a multi-packet 1239 * sequence, but sometimes the next multi-packet would not 1240 * come. Check for this, and when it happens process the 1241 * position packet as usual. 1242 */ 1243 if (f->is_mp) { 1244 /* Now process the 1st packet */ 1245 priv->decode_fields(f, priv->multi_data, psmouse); 1246 } else { 1247 priv->multi_packet = 0; 1248 } 1249 } 1250 1251 /* 1252 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet. 1253 * When it is set, it means 2nd packet comes without 1st packet come. 1254 */ 1255 if (f->is_mp) 1256 return; 1257 1258 /* Save the first packet */ 1259 if (!priv->multi_packet && f->first_mp) { 1260 priv->multi_packet = 1; 1261 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 1262 return; 1263 } 1264 1265 priv->multi_packet = 0; 1266 1267 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4); 1268 1269 input_mt_report_finger_count(dev, f->fingers); 1270 1271 input_report_key(dev, BTN_LEFT, f->left); 1272 input_report_key(dev, BTN_RIGHT, f->right); 1273 input_report_key(dev, BTN_MIDDLE, f->middle); 1274 1275 input_report_abs(dev, ABS_PRESSURE, f->pressure); 1276 input_sync(dev); 1277 } 1278 1279 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse) 1280 { 1281 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08)) 1282 return false; 1283 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0)) 1284 return false; 1285 return true; 1286 } 1287 1288 static DEFINE_MUTEX(alps_mutex); 1289 1290 static void alps_register_bare_ps2_mouse(struct work_struct *work) 1291 { 1292 struct alps_data *priv = 1293 container_of(work, struct alps_data, dev3_register_work.work); 1294 struct psmouse *psmouse = priv->psmouse; 1295 struct input_dev *dev3; 1296 int error = 0; 1297 1298 mutex_lock(&alps_mutex); 1299 1300 if (priv->dev3) 1301 goto out; 1302 1303 dev3 = input_allocate_device(); 1304 if (!dev3) { 1305 psmouse_err(psmouse, "failed to allocate secondary device\n"); 1306 error = -ENOMEM; 1307 goto out; 1308 } 1309 1310 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s", 1311 psmouse->ps2dev.serio->phys, 1312 (priv->dev2 ? "input2" : "input1")); 1313 dev3->phys = priv->phys3; 1314 1315 /* 1316 * format of input device name is: "protocol vendor name" 1317 * see function psmouse_switch_protocol() in psmouse-base.c 1318 */ 1319 dev3->name = "PS/2 ALPS Mouse"; 1320 1321 dev3->id.bustype = BUS_I8042; 1322 dev3->id.vendor = 0x0002; 1323 dev3->id.product = PSMOUSE_PS2; 1324 dev3->id.version = 0x0000; 1325 dev3->dev.parent = &psmouse->ps2dev.serio->dev; 1326 1327 input_set_capability(dev3, EV_REL, REL_X); 1328 input_set_capability(dev3, EV_REL, REL_Y); 1329 input_set_capability(dev3, EV_KEY, BTN_LEFT); 1330 input_set_capability(dev3, EV_KEY, BTN_RIGHT); 1331 input_set_capability(dev3, EV_KEY, BTN_MIDDLE); 1332 1333 __set_bit(INPUT_PROP_POINTER, dev3->propbit); 1334 1335 error = input_register_device(dev3); 1336 if (error) { 1337 psmouse_err(psmouse, 1338 "failed to register secondary device: %d\n", 1339 error); 1340 input_free_device(dev3); 1341 goto out; 1342 } 1343 1344 priv->dev3 = dev3; 1345 1346 out: 1347 /* 1348 * Save the error code so that we can detect that we 1349 * already tried to create the device. 1350 */ 1351 if (error) 1352 priv->dev3 = ERR_PTR(error); 1353 1354 mutex_unlock(&alps_mutex); 1355 } 1356 1357 static void alps_report_bare_ps2_packet(struct psmouse *psmouse, 1358 unsigned char packet[], 1359 bool report_buttons) 1360 { 1361 struct alps_data *priv = psmouse->private; 1362 struct input_dev *dev, *dev2 = NULL; 1363 1364 /* Figure out which device to use to report the bare packet */ 1365 if (priv->proto_version == ALPS_PROTO_V2 && 1366 (priv->flags & ALPS_DUALPOINT)) { 1367 /* On V2 devices the DualPoint Stick reports bare packets */ 1368 dev = priv->dev2; 1369 dev2 = psmouse->dev; 1370 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) { 1371 /* Register dev3 mouse if we received PS/2 packet first time */ 1372 if (!IS_ERR(priv->dev3)) 1373 psmouse_queue_work(psmouse, &priv->dev3_register_work, 1374 0); 1375 return; 1376 } else { 1377 dev = priv->dev3; 1378 } 1379 1380 if (report_buttons) 1381 alps_report_buttons(dev, dev2, 1382 packet[0] & 1, packet[0] & 2, packet[0] & 4); 1383 1384 input_report_rel(dev, REL_X, 1385 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0); 1386 input_report_rel(dev, REL_Y, 1387 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0); 1388 1389 input_sync(dev); 1390 } 1391 1392 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse) 1393 { 1394 struct alps_data *priv = psmouse->private; 1395 1396 if (psmouse->pktcnt < 6) 1397 return PSMOUSE_GOOD_DATA; 1398 1399 if (psmouse->pktcnt == 6) { 1400 /* 1401 * Start a timer to flush the packet if it ends up last 1402 * 6-byte packet in the stream. Timer needs to fire 1403 * psmouse core times out itself. 20 ms should be enough 1404 * to decide if we are getting more data or not. 1405 */ 1406 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20)); 1407 return PSMOUSE_GOOD_DATA; 1408 } 1409 1410 del_timer(&priv->timer); 1411 1412 if (psmouse->packet[6] & 0x80) { 1413 1414 /* 1415 * Highest bit is set - that means we either had 1416 * complete ALPS packet and this is start of the 1417 * next packet or we got garbage. 1418 */ 1419 1420 if (((psmouse->packet[3] | 1421 psmouse->packet[4] | 1422 psmouse->packet[5]) & 0x80) || 1423 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) { 1424 psmouse_dbg(psmouse, 1425 "refusing packet %4ph (suspected interleaved ps/2)\n", 1426 psmouse->packet + 3); 1427 return PSMOUSE_BAD_DATA; 1428 } 1429 1430 priv->process_packet(psmouse); 1431 1432 /* Continue with the next packet */ 1433 psmouse->packet[0] = psmouse->packet[6]; 1434 psmouse->pktcnt = 1; 1435 1436 } else { 1437 1438 /* 1439 * High bit is 0 - that means that we indeed got a PS/2 1440 * packet in the middle of ALPS packet. 1441 * 1442 * There is also possibility that we got 6-byte ALPS 1443 * packet followed by 3-byte packet from trackpoint. We 1444 * can not distinguish between these 2 scenarios but 1445 * because the latter is unlikely to happen in course of 1446 * normal operation (user would need to press all 1447 * buttons on the pad and start moving trackpoint 1448 * without touching the pad surface) we assume former. 1449 * Even if we are wrong the wost thing that would happen 1450 * the cursor would jump but we should not get protocol 1451 * de-synchronization. 1452 */ 1453 1454 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3], 1455 false); 1456 1457 /* 1458 * Continue with the standard ALPS protocol handling, 1459 * but make sure we won't process it as an interleaved 1460 * packet again, which may happen if all buttons are 1461 * pressed. To avoid this let's reset the 4th bit which 1462 * is normally 1. 1463 */ 1464 psmouse->packet[3] = psmouse->packet[6] & 0xf7; 1465 psmouse->pktcnt = 4; 1466 } 1467 1468 return PSMOUSE_GOOD_DATA; 1469 } 1470 1471 static void alps_flush_packet(unsigned long data) 1472 { 1473 struct psmouse *psmouse = (struct psmouse *)data; 1474 struct alps_data *priv = psmouse->private; 1475 1476 serio_pause_rx(psmouse->ps2dev.serio); 1477 1478 if (psmouse->pktcnt == psmouse->pktsize) { 1479 1480 /* 1481 * We did not any more data in reasonable amount of time. 1482 * Validate the last 3 bytes and process as a standard 1483 * ALPS packet. 1484 */ 1485 if ((psmouse->packet[3] | 1486 psmouse->packet[4] | 1487 psmouse->packet[5]) & 0x80) { 1488 psmouse_dbg(psmouse, 1489 "refusing packet %3ph (suspected interleaved ps/2)\n", 1490 psmouse->packet + 3); 1491 } else { 1492 priv->process_packet(psmouse); 1493 } 1494 psmouse->pktcnt = 0; 1495 } 1496 1497 serio_continue_rx(psmouse->ps2dev.serio); 1498 } 1499 1500 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse) 1501 { 1502 struct alps_data *priv = psmouse->private; 1503 1504 /* 1505 * Check if we are dealing with a bare PS/2 packet, presumably from 1506 * a device connected to the external PS/2 port. Because bare PS/2 1507 * protocol does not have enough constant bits to self-synchronize 1508 * properly we only do this if the device is fully synchronized. 1509 * Can not distinguish V8's first byte from PS/2 packet's 1510 */ 1511 if (priv->proto_version != ALPS_PROTO_V8 && 1512 !psmouse->out_of_sync_cnt && 1513 (psmouse->packet[0] & 0xc8) == 0x08) { 1514 1515 if (psmouse->pktcnt == 3) { 1516 alps_report_bare_ps2_packet(psmouse, psmouse->packet, 1517 true); 1518 return PSMOUSE_FULL_PACKET; 1519 } 1520 return PSMOUSE_GOOD_DATA; 1521 } 1522 1523 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */ 1524 1525 if ((priv->flags & ALPS_PS2_INTERLEAVED) && 1526 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) { 1527 return alps_handle_interleaved_ps2(psmouse); 1528 } 1529 1530 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) { 1531 psmouse_dbg(psmouse, 1532 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n", 1533 psmouse->packet[0], priv->mask0, priv->byte0); 1534 return PSMOUSE_BAD_DATA; 1535 } 1536 1537 /* Bytes 2 - pktsize should have 0 in the highest bit */ 1538 if (priv->proto_version < ALPS_PROTO_V5 && 1539 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize && 1540 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) { 1541 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1542 psmouse->pktcnt - 1, 1543 psmouse->packet[psmouse->pktcnt - 1]); 1544 1545 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE && 1546 psmouse->pktcnt == psmouse->pktsize) { 1547 /* 1548 * Some Dell boxes, such as Latitude E6440 or E7440 1549 * with closed lid, quite often smash last byte of 1550 * otherwise valid packet with 0xff. Given that the 1551 * next packet is very likely to be valid let's 1552 * report PSMOUSE_FULL_PACKET but not process data, 1553 * rather than reporting PSMOUSE_BAD_DATA and 1554 * filling the logs. 1555 */ 1556 return PSMOUSE_FULL_PACKET; 1557 } 1558 1559 return PSMOUSE_BAD_DATA; 1560 } 1561 1562 if ((priv->proto_version == ALPS_PROTO_V7 && 1563 !alps_is_valid_package_v7(psmouse)) || 1564 (priv->proto_version == ALPS_PROTO_V8 && 1565 !alps_is_valid_package_ss4_v2(psmouse))) { 1566 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1567 psmouse->pktcnt - 1, 1568 psmouse->packet[psmouse->pktcnt - 1]); 1569 return PSMOUSE_BAD_DATA; 1570 } 1571 1572 if (psmouse->pktcnt == psmouse->pktsize) { 1573 priv->process_packet(psmouse); 1574 return PSMOUSE_FULL_PACKET; 1575 } 1576 1577 return PSMOUSE_GOOD_DATA; 1578 } 1579 1580 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble) 1581 { 1582 struct ps2dev *ps2dev = &psmouse->ps2dev; 1583 struct alps_data *priv = psmouse->private; 1584 int command; 1585 unsigned char *param; 1586 unsigned char dummy[4]; 1587 1588 BUG_ON(nibble > 0xf); 1589 1590 command = priv->nibble_commands[nibble].command; 1591 param = (command & 0x0f00) ? 1592 dummy : (unsigned char *)&priv->nibble_commands[nibble].data; 1593 1594 if (ps2_command(ps2dev, param, command)) 1595 return -1; 1596 1597 return 0; 1598 } 1599 1600 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr) 1601 { 1602 struct ps2dev *ps2dev = &psmouse->ps2dev; 1603 struct alps_data *priv = psmouse->private; 1604 int i, nibble; 1605 1606 if (ps2_command(ps2dev, NULL, priv->addr_command)) 1607 return -1; 1608 1609 for (i = 12; i >= 0; i -= 4) { 1610 nibble = (addr >> i) & 0xf; 1611 if (alps_command_mode_send_nibble(psmouse, nibble)) 1612 return -1; 1613 } 1614 1615 return 0; 1616 } 1617 1618 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1619 { 1620 struct ps2dev *ps2dev = &psmouse->ps2dev; 1621 unsigned char param[4]; 1622 1623 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1624 return -1; 1625 1626 /* 1627 * The address being read is returned in the first two bytes 1628 * of the result. Check that this address matches the expected 1629 * address. 1630 */ 1631 if (addr != ((param[0] << 8) | param[1])) 1632 return -1; 1633 1634 return param[2]; 1635 } 1636 1637 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1638 { 1639 if (alps_command_mode_set_addr(psmouse, addr)) 1640 return -1; 1641 return __alps_command_mode_read_reg(psmouse, addr); 1642 } 1643 1644 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value) 1645 { 1646 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf)) 1647 return -1; 1648 if (alps_command_mode_send_nibble(psmouse, value & 0xf)) 1649 return -1; 1650 return 0; 1651 } 1652 1653 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr, 1654 u8 value) 1655 { 1656 if (alps_command_mode_set_addr(psmouse, addr)) 1657 return -1; 1658 return __alps_command_mode_write_reg(psmouse, value); 1659 } 1660 1661 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command, 1662 int repeated_command, unsigned char *param) 1663 { 1664 struct ps2dev *ps2dev = &psmouse->ps2dev; 1665 1666 param[0] = 0; 1667 if (init_command && ps2_command(ps2dev, param, init_command)) 1668 return -EIO; 1669 1670 if (ps2_command(ps2dev, NULL, repeated_command) || 1671 ps2_command(ps2dev, NULL, repeated_command) || 1672 ps2_command(ps2dev, NULL, repeated_command)) 1673 return -EIO; 1674 1675 param[0] = param[1] = param[2] = 0xff; 1676 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1677 return -EIO; 1678 1679 psmouse_dbg(psmouse, "%2.2X report: %3ph\n", 1680 repeated_command, param); 1681 return 0; 1682 } 1683 1684 static bool alps_check_valid_firmware_id(unsigned char id[]) 1685 { 1686 if (id[0] == 0x73) 1687 return true; 1688 1689 if (id[0] == 0x88 && 1690 (id[1] == 0x07 || 1691 id[1] == 0x08 || 1692 (id[1] & 0xf0) == 0xb0 || 1693 (id[1] & 0xf0) == 0xc0)) { 1694 return true; 1695 } 1696 1697 return false; 1698 } 1699 1700 static int alps_enter_command_mode(struct psmouse *psmouse) 1701 { 1702 unsigned char param[4]; 1703 1704 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) { 1705 psmouse_err(psmouse, "failed to enter command mode\n"); 1706 return -1; 1707 } 1708 1709 if (!alps_check_valid_firmware_id(param)) { 1710 psmouse_dbg(psmouse, 1711 "unknown response while entering command mode\n"); 1712 return -1; 1713 } 1714 return 0; 1715 } 1716 1717 static inline int alps_exit_command_mode(struct psmouse *psmouse) 1718 { 1719 struct ps2dev *ps2dev = &psmouse->ps2dev; 1720 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) 1721 return -1; 1722 return 0; 1723 } 1724 1725 /* 1726 * For DualPoint devices select the device that should respond to 1727 * subsequent commands. It looks like glidepad is behind stickpointer, 1728 * I'd thought it would be other way around... 1729 */ 1730 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable) 1731 { 1732 struct ps2dev *ps2dev = &psmouse->ps2dev; 1733 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11; 1734 1735 if (ps2_command(ps2dev, NULL, cmd) || 1736 ps2_command(ps2dev, NULL, cmd) || 1737 ps2_command(ps2dev, NULL, cmd) || 1738 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1739 return -1; 1740 1741 /* we may get 3 more bytes, just ignore them */ 1742 ps2_drain(ps2dev, 3, 100); 1743 1744 return 0; 1745 } 1746 1747 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse) 1748 { 1749 struct ps2dev *ps2dev = &psmouse->ps2dev; 1750 1751 /* Try ALPS magic knock - 4 disable before enable */ 1752 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1753 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1754 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1755 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1756 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1757 return -1; 1758 1759 /* 1760 * Switch mouse to poll (remote) mode so motion data will not 1761 * get in our way 1762 */ 1763 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL); 1764 } 1765 1766 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word) 1767 { 1768 int i, nibble; 1769 1770 /* 1771 * b0-b11 are valid bits, send sequence is inverse. 1772 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1 1773 */ 1774 for (i = 0; i <= 8; i += 4) { 1775 nibble = (word >> i) & 0xf; 1776 if (alps_command_mode_send_nibble(psmouse, nibble)) 1777 return -1; 1778 } 1779 1780 return 0; 1781 } 1782 1783 static int alps_monitor_mode_write_reg(struct psmouse *psmouse, 1784 u16 addr, u16 value) 1785 { 1786 struct ps2dev *ps2dev = &psmouse->ps2dev; 1787 1788 /* 0x0A0 is the command to write the word */ 1789 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) || 1790 alps_monitor_mode_send_word(psmouse, 0x0A0) || 1791 alps_monitor_mode_send_word(psmouse, addr) || 1792 alps_monitor_mode_send_word(psmouse, value) || 1793 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1794 return -1; 1795 1796 return 0; 1797 } 1798 1799 static int alps_monitor_mode(struct psmouse *psmouse, bool enable) 1800 { 1801 struct ps2dev *ps2dev = &psmouse->ps2dev; 1802 1803 if (enable) { 1804 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */ 1805 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 1806 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) || 1807 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1808 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1809 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1810 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1811 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1812 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO)) 1813 return -1; 1814 } else { 1815 /* EC to exit monitor mode */ 1816 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP)) 1817 return -1; 1818 } 1819 1820 return 0; 1821 } 1822 1823 static int alps_absolute_mode_v6(struct psmouse *psmouse) 1824 { 1825 u16 reg_val = 0x181; 1826 int ret = -1; 1827 1828 /* enter monitor mode, to write the register */ 1829 if (alps_monitor_mode(psmouse, true)) 1830 return -1; 1831 1832 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val); 1833 1834 if (alps_monitor_mode(psmouse, false)) 1835 ret = -1; 1836 1837 return ret; 1838 } 1839 1840 static int alps_get_status(struct psmouse *psmouse, char *param) 1841 { 1842 /* Get status: 0xF5 0xF5 0xF5 0xE9 */ 1843 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param)) 1844 return -1; 1845 1846 return 0; 1847 } 1848 1849 /* 1850 * Turn touchpad tapping on or off. The sequences are: 1851 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable, 1852 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable. 1853 * My guess that 0xE9 (GetInfo) is here as a sync point. 1854 * For models that also have stickpointer (DualPoints) its tapping 1855 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but 1856 * we don't fiddle with it. 1857 */ 1858 static int alps_tap_mode(struct psmouse *psmouse, int enable) 1859 { 1860 struct ps2dev *ps2dev = &psmouse->ps2dev; 1861 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES; 1862 unsigned char tap_arg = enable ? 0x0A : 0x00; 1863 unsigned char param[4]; 1864 1865 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) || 1866 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1867 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1868 ps2_command(ps2dev, &tap_arg, cmd)) 1869 return -1; 1870 1871 if (alps_get_status(psmouse, param)) 1872 return -1; 1873 1874 return 0; 1875 } 1876 1877 /* 1878 * alps_poll() - poll the touchpad for current motion packet. 1879 * Used in resync. 1880 */ 1881 static int alps_poll(struct psmouse *psmouse) 1882 { 1883 struct alps_data *priv = psmouse->private; 1884 unsigned char buf[sizeof(psmouse->packet)]; 1885 bool poll_failed; 1886 1887 if (priv->flags & ALPS_PASS) 1888 alps_passthrough_mode_v2(psmouse, true); 1889 1890 poll_failed = ps2_command(&psmouse->ps2dev, buf, 1891 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0; 1892 1893 if (priv->flags & ALPS_PASS) 1894 alps_passthrough_mode_v2(psmouse, false); 1895 1896 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0) 1897 return -1; 1898 1899 if ((psmouse->badbyte & 0xc8) == 0x08) { 1900 /* 1901 * Poll the track stick ... 1902 */ 1903 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8))) 1904 return -1; 1905 } 1906 1907 memcpy(psmouse->packet, buf, sizeof(buf)); 1908 return 0; 1909 } 1910 1911 static int alps_hw_init_v1_v2(struct psmouse *psmouse) 1912 { 1913 struct alps_data *priv = psmouse->private; 1914 1915 if ((priv->flags & ALPS_PASS) && 1916 alps_passthrough_mode_v2(psmouse, true)) { 1917 return -1; 1918 } 1919 1920 if (alps_tap_mode(psmouse, true)) { 1921 psmouse_warn(psmouse, "Failed to enable hardware tapping\n"); 1922 return -1; 1923 } 1924 1925 if (alps_absolute_mode_v1_v2(psmouse)) { 1926 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 1927 return -1; 1928 } 1929 1930 if ((priv->flags & ALPS_PASS) && 1931 alps_passthrough_mode_v2(psmouse, false)) { 1932 return -1; 1933 } 1934 1935 /* ALPS needs stream mode, otherwise it won't report any data */ 1936 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) { 1937 psmouse_err(psmouse, "Failed to enable stream mode\n"); 1938 return -1; 1939 } 1940 1941 return 0; 1942 } 1943 1944 static int alps_hw_init_v6(struct psmouse *psmouse) 1945 { 1946 unsigned char param[2] = {0xC8, 0x14}; 1947 1948 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */ 1949 if (alps_passthrough_mode_v2(psmouse, true)) 1950 return -1; 1951 1952 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1953 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1954 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1955 ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 1956 ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 1957 return -1; 1958 1959 if (alps_passthrough_mode_v2(psmouse, false)) 1960 return -1; 1961 1962 if (alps_absolute_mode_v6(psmouse)) { 1963 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 1964 return -1; 1965 } 1966 1967 return 0; 1968 } 1969 1970 /* 1971 * Enable or disable passthrough mode to the trackstick. 1972 */ 1973 static int alps_passthrough_mode_v3(struct psmouse *psmouse, 1974 int reg_base, bool enable) 1975 { 1976 int reg_val, ret = -1; 1977 1978 if (alps_enter_command_mode(psmouse)) 1979 return -1; 1980 1981 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008); 1982 if (reg_val == -1) 1983 goto error; 1984 1985 if (enable) 1986 reg_val |= 0x01; 1987 else 1988 reg_val &= ~0x01; 1989 1990 ret = __alps_command_mode_write_reg(psmouse, reg_val); 1991 1992 error: 1993 if (alps_exit_command_mode(psmouse)) 1994 ret = -1; 1995 return ret; 1996 } 1997 1998 /* Must be in command mode when calling this function */ 1999 static int alps_absolute_mode_v3(struct psmouse *psmouse) 2000 { 2001 int reg_val; 2002 2003 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 2004 if (reg_val == -1) 2005 return -1; 2006 2007 reg_val |= 0x06; 2008 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2009 return -1; 2010 2011 return 0; 2012 } 2013 2014 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base) 2015 { 2016 int ret = -EIO, reg_val; 2017 2018 if (alps_enter_command_mode(psmouse)) 2019 goto error; 2020 2021 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08); 2022 if (reg_val == -1) 2023 goto error; 2024 2025 /* bit 7: trackstick is present */ 2026 ret = reg_val & 0x80 ? 0 : -ENODEV; 2027 2028 error: 2029 alps_exit_command_mode(psmouse); 2030 return ret; 2031 } 2032 2033 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base) 2034 { 2035 struct ps2dev *ps2dev = &psmouse->ps2dev; 2036 int ret = 0; 2037 unsigned char param[4]; 2038 2039 if (alps_passthrough_mode_v3(psmouse, reg_base, true)) 2040 return -EIO; 2041 2042 /* 2043 * E7 report for the trackstick 2044 * 2045 * There have been reports of failures to seem to trace back 2046 * to the above trackstick check failing. When these occur 2047 * this E7 report fails, so when that happens we continue 2048 * with the assumption that there isn't a trackstick after 2049 * all. 2050 */ 2051 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) { 2052 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n"); 2053 ret = -ENODEV; 2054 } else { 2055 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param); 2056 2057 /* 2058 * Not sure what this does, but it is absolutely 2059 * essential. Without it, the touchpad does not 2060 * work at all and the trackstick just emits normal 2061 * PS/2 packets. 2062 */ 2063 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2064 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2065 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2066 alps_command_mode_send_nibble(psmouse, 0x9) || 2067 alps_command_mode_send_nibble(psmouse, 0x4)) { 2068 psmouse_err(psmouse, 2069 "Error sending magic E6 sequence\n"); 2070 ret = -EIO; 2071 goto error; 2072 } 2073 2074 /* 2075 * This ensures the trackstick packets are in the format 2076 * supported by this driver. If bit 1 isn't set the packet 2077 * format is different. 2078 */ 2079 if (alps_enter_command_mode(psmouse) || 2080 alps_command_mode_write_reg(psmouse, 2081 reg_base + 0x08, 0x82) || 2082 alps_exit_command_mode(psmouse)) 2083 ret = -EIO; 2084 } 2085 2086 error: 2087 if (alps_passthrough_mode_v3(psmouse, reg_base, false)) 2088 ret = -EIO; 2089 2090 return ret; 2091 } 2092 2093 static int alps_hw_init_v3(struct psmouse *psmouse) 2094 { 2095 struct ps2dev *ps2dev = &psmouse->ps2dev; 2096 int reg_val; 2097 unsigned char param[4]; 2098 2099 reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE); 2100 if (reg_val == -EIO) 2101 goto error; 2102 2103 if (reg_val == 0 && 2104 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO) 2105 goto error; 2106 2107 if (alps_enter_command_mode(psmouse) || 2108 alps_absolute_mode_v3(psmouse)) { 2109 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2110 goto error; 2111 } 2112 2113 reg_val = alps_command_mode_read_reg(psmouse, 0x0006); 2114 if (reg_val == -1) 2115 goto error; 2116 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2117 goto error; 2118 2119 reg_val = alps_command_mode_read_reg(psmouse, 0x0007); 2120 if (reg_val == -1) 2121 goto error; 2122 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2123 goto error; 2124 2125 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1) 2126 goto error; 2127 if (__alps_command_mode_write_reg(psmouse, 0x04)) 2128 goto error; 2129 2130 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1) 2131 goto error; 2132 if (__alps_command_mode_write_reg(psmouse, 0x03)) 2133 goto error; 2134 2135 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1) 2136 goto error; 2137 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03)) 2138 goto error; 2139 2140 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1) 2141 goto error; 2142 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04)) 2143 goto error; 2144 2145 alps_exit_command_mode(psmouse); 2146 2147 /* Set rate and enable data reporting */ 2148 param[0] = 0x64; 2149 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2150 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2151 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2152 return -1; 2153 } 2154 2155 return 0; 2156 2157 error: 2158 /* 2159 * Leaving the touchpad in command mode will essentially render 2160 * it unusable until the machine reboots, so exit it here just 2161 * to be safe 2162 */ 2163 alps_exit_command_mode(psmouse); 2164 return -1; 2165 } 2166 2167 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch) 2168 { 2169 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys; 2170 struct alps_data *priv = psmouse->private; 2171 2172 reg = alps_command_mode_read_reg(psmouse, reg_pitch); 2173 if (reg < 0) 2174 return reg; 2175 2176 x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2177 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */ 2178 2179 y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */ 2180 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */ 2181 2182 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1); 2183 if (reg < 0) 2184 return reg; 2185 2186 x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2187 x_electrode = 17 + x_electrode; 2188 2189 y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */ 2190 y_electrode = 13 + y_electrode; 2191 2192 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */ 2193 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */ 2194 2195 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2196 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2197 2198 psmouse_dbg(psmouse, 2199 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n", 2200 x_pitch, y_pitch, x_electrode, y_electrode, 2201 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res); 2202 2203 return 0; 2204 } 2205 2206 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse) 2207 { 2208 struct alps_data *priv = psmouse->private; 2209 struct ps2dev *ps2dev = &psmouse->ps2dev; 2210 int reg_val, ret = -1; 2211 2212 if (priv->flags & ALPS_DUALPOINT) { 2213 reg_val = alps_setup_trackstick_v3(psmouse, 2214 ALPS_REG_BASE_RUSHMORE); 2215 if (reg_val == -EIO) 2216 goto error; 2217 } 2218 2219 if (alps_enter_command_mode(psmouse) || 2220 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 || 2221 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00)) 2222 goto error; 2223 2224 if (alps_get_v3_v7_resolution(psmouse, 0xc2da)) 2225 goto error; 2226 2227 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6); 2228 if (reg_val == -1) 2229 goto error; 2230 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd)) 2231 goto error; 2232 2233 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2234 goto error; 2235 2236 /* enter absolute mode */ 2237 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2238 if (reg_val == -1) 2239 goto error; 2240 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2241 goto error; 2242 2243 alps_exit_command_mode(psmouse); 2244 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2245 2246 error: 2247 alps_exit_command_mode(psmouse); 2248 return ret; 2249 } 2250 2251 /* Must be in command mode when calling this function */ 2252 static int alps_absolute_mode_v4(struct psmouse *psmouse) 2253 { 2254 int reg_val; 2255 2256 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 2257 if (reg_val == -1) 2258 return -1; 2259 2260 reg_val |= 0x02; 2261 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2262 return -1; 2263 2264 return 0; 2265 } 2266 2267 static int alps_hw_init_v4(struct psmouse *psmouse) 2268 { 2269 struct ps2dev *ps2dev = &psmouse->ps2dev; 2270 unsigned char param[4]; 2271 2272 if (alps_enter_command_mode(psmouse)) 2273 goto error; 2274 2275 if (alps_absolute_mode_v4(psmouse)) { 2276 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2277 goto error; 2278 } 2279 2280 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c)) 2281 goto error; 2282 2283 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03)) 2284 goto error; 2285 2286 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03)) 2287 goto error; 2288 2289 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15)) 2290 goto error; 2291 2292 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01)) 2293 goto error; 2294 2295 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03)) 2296 goto error; 2297 2298 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03)) 2299 goto error; 2300 2301 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03)) 2302 goto error; 2303 2304 alps_exit_command_mode(psmouse); 2305 2306 /* 2307 * This sequence changes the output from a 9-byte to an 2308 * 8-byte format. All the same data seems to be present, 2309 * just in a more compact format. 2310 */ 2311 param[0] = 0xc8; 2312 param[1] = 0x64; 2313 param[2] = 0x50; 2314 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2315 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) || 2316 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) || 2317 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 2318 return -1; 2319 2320 /* Set rate and enable data reporting */ 2321 param[0] = 0x64; 2322 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2323 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2324 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2325 return -1; 2326 } 2327 2328 return 0; 2329 2330 error: 2331 /* 2332 * Leaving the touchpad in command mode will essentially render 2333 * it unusable until the machine reboots, so exit it here just 2334 * to be safe 2335 */ 2336 alps_exit_command_mode(psmouse); 2337 return -1; 2338 } 2339 2340 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse, 2341 unsigned char index, unsigned char otp[]) 2342 { 2343 struct ps2dev *ps2dev = &psmouse->ps2dev; 2344 2345 switch (index) { 2346 case 0: 2347 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2348 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2349 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2350 return -1; 2351 2352 break; 2353 2354 case 1: 2355 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2356 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2357 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2358 return -1; 2359 2360 break; 2361 } 2362 2363 return 0; 2364 } 2365 2366 static int alps_update_device_area_ss4_v2(unsigned char otp[][4], 2367 struct alps_data *priv) 2368 { 2369 int num_x_electrode; 2370 int num_y_electrode; 2371 int x_pitch, y_pitch, x_phys, y_phys; 2372 2373 num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F); 2374 num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F); 2375 2376 priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2377 priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2378 2379 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM; 2380 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM; 2381 2382 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */ 2383 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */ 2384 2385 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2386 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2387 2388 return 0; 2389 } 2390 2391 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4], 2392 struct alps_data *priv) 2393 { 2394 unsigned char is_btnless; 2395 2396 is_btnless = (otp[1][1] >> 3) & 0x01; 2397 2398 if (is_btnless) 2399 priv->flags |= ALPS_BUTTONPAD; 2400 2401 return 0; 2402 } 2403 2404 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse, 2405 struct alps_data *priv) 2406 { 2407 unsigned char otp[2][4]; 2408 2409 memset(otp, 0, sizeof(otp)); 2410 2411 if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) || 2412 alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0])) 2413 return -1; 2414 2415 alps_update_device_area_ss4_v2(otp, priv); 2416 2417 alps_update_btn_info_ss4_v2(otp, priv); 2418 2419 return 0; 2420 } 2421 2422 static int alps_dolphin_get_device_area(struct psmouse *psmouse, 2423 struct alps_data *priv) 2424 { 2425 struct ps2dev *ps2dev = &psmouse->ps2dev; 2426 unsigned char param[4] = {0}; 2427 int num_x_electrode, num_y_electrode; 2428 2429 if (alps_enter_command_mode(psmouse)) 2430 return -1; 2431 2432 param[0] = 0x0a; 2433 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 2434 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2435 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2436 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2437 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE)) 2438 return -1; 2439 2440 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 2441 return -1; 2442 2443 /* 2444 * Dolphin's sensor line number is not fixed. It can be calculated 2445 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET. 2446 * Further more, we can get device's x_max and y_max by multiplying 2447 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE. 2448 * 2449 * e.g. When we get register's sensor_x = 11 & sensor_y = 8, 2450 * real sensor line number X = 11 + 8 = 19, and 2451 * real sensor line number Y = 8 + 1 = 9. 2452 * So, x_max = (19 - 1) * 64 = 1152, and 2453 * y_max = (9 - 1) * 64 = 512. 2454 */ 2455 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F); 2456 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F); 2457 priv->x_bits = num_x_electrode; 2458 priv->y_bits = num_y_electrode; 2459 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2460 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2461 2462 if (alps_exit_command_mode(psmouse)) 2463 return -1; 2464 2465 return 0; 2466 } 2467 2468 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse) 2469 { 2470 struct ps2dev *ps2dev = &psmouse->ps2dev; 2471 unsigned char param[2]; 2472 2473 /* This is dolphin "v1" as empirically defined by florin9doi */ 2474 param[0] = 0x64; 2475 param[1] = 0x28; 2476 2477 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2478 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2479 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 2480 return -1; 2481 2482 return 0; 2483 } 2484 2485 static int alps_hw_init_v7(struct psmouse *psmouse) 2486 { 2487 struct ps2dev *ps2dev = &psmouse->ps2dev; 2488 int reg_val, ret = -1; 2489 2490 if (alps_enter_command_mode(psmouse) || 2491 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1) 2492 goto error; 2493 2494 if (alps_get_v3_v7_resolution(psmouse, 0xc397)) 2495 goto error; 2496 2497 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2498 goto error; 2499 2500 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2501 if (reg_val == -1) 2502 goto error; 2503 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2504 goto error; 2505 2506 alps_exit_command_mode(psmouse); 2507 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2508 2509 error: 2510 alps_exit_command_mode(psmouse); 2511 return ret; 2512 } 2513 2514 static int alps_hw_init_ss4_v2(struct psmouse *psmouse) 2515 { 2516 struct ps2dev *ps2dev = &psmouse->ps2dev; 2517 char param[2] = {0x64, 0x28}; 2518 int ret = -1; 2519 2520 /* enter absolute mode */ 2521 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2522 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2523 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2524 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) { 2525 goto error; 2526 } 2527 2528 /* T.B.D. Decread noise packet number, delete in the future */ 2529 if (alps_exit_command_mode(psmouse) || 2530 alps_enter_command_mode(psmouse) || 2531 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) { 2532 goto error; 2533 } 2534 alps_exit_command_mode(psmouse); 2535 2536 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2537 2538 error: 2539 alps_exit_command_mode(psmouse); 2540 return ret; 2541 } 2542 2543 static int alps_set_protocol(struct psmouse *psmouse, 2544 struct alps_data *priv, 2545 const struct alps_protocol_info *protocol) 2546 { 2547 psmouse->private = priv; 2548 2549 setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse); 2550 2551 priv->proto_version = protocol->version; 2552 priv->byte0 = protocol->byte0; 2553 priv->mask0 = protocol->mask0; 2554 priv->flags = protocol->flags; 2555 if (dmi_name_in_vendors("Dell")) 2556 priv->flags |= ALPS_DELL; 2557 2558 priv->x_max = 2000; 2559 priv->y_max = 1400; 2560 priv->x_bits = 15; 2561 priv->y_bits = 11; 2562 2563 switch (priv->proto_version) { 2564 case ALPS_PROTO_V1: 2565 case ALPS_PROTO_V2: 2566 priv->hw_init = alps_hw_init_v1_v2; 2567 priv->process_packet = alps_process_packet_v1_v2; 2568 priv->set_abs_params = alps_set_abs_params_st; 2569 priv->x_max = 1023; 2570 priv->y_max = 767; 2571 break; 2572 2573 case ALPS_PROTO_V3: 2574 priv->hw_init = alps_hw_init_v3; 2575 priv->process_packet = alps_process_packet_v3; 2576 priv->set_abs_params = alps_set_abs_params_semi_mt; 2577 priv->decode_fields = alps_decode_pinnacle; 2578 priv->nibble_commands = alps_v3_nibble_commands; 2579 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2580 break; 2581 2582 case ALPS_PROTO_V3_RUSHMORE: 2583 priv->hw_init = alps_hw_init_rushmore_v3; 2584 priv->process_packet = alps_process_packet_v3; 2585 priv->set_abs_params = alps_set_abs_params_semi_mt; 2586 priv->decode_fields = alps_decode_rushmore; 2587 priv->nibble_commands = alps_v3_nibble_commands; 2588 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2589 priv->x_bits = 16; 2590 priv->y_bits = 12; 2591 2592 if (alps_probe_trackstick_v3(psmouse, 2593 ALPS_REG_BASE_RUSHMORE) < 0) 2594 priv->flags &= ~ALPS_DUALPOINT; 2595 2596 break; 2597 2598 case ALPS_PROTO_V4: 2599 priv->hw_init = alps_hw_init_v4; 2600 priv->process_packet = alps_process_packet_v4; 2601 priv->set_abs_params = alps_set_abs_params_semi_mt; 2602 priv->nibble_commands = alps_v4_nibble_commands; 2603 priv->addr_command = PSMOUSE_CMD_DISABLE; 2604 break; 2605 2606 case ALPS_PROTO_V5: 2607 priv->hw_init = alps_hw_init_dolphin_v1; 2608 priv->process_packet = alps_process_touchpad_packet_v3_v5; 2609 priv->decode_fields = alps_decode_dolphin; 2610 priv->set_abs_params = alps_set_abs_params_semi_mt; 2611 priv->nibble_commands = alps_v3_nibble_commands; 2612 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2613 priv->x_bits = 23; 2614 priv->y_bits = 12; 2615 2616 if (alps_dolphin_get_device_area(psmouse, priv)) 2617 return -EIO; 2618 2619 break; 2620 2621 case ALPS_PROTO_V6: 2622 priv->hw_init = alps_hw_init_v6; 2623 priv->process_packet = alps_process_packet_v6; 2624 priv->set_abs_params = alps_set_abs_params_st; 2625 priv->nibble_commands = alps_v6_nibble_commands; 2626 priv->x_max = 2047; 2627 priv->y_max = 1535; 2628 break; 2629 2630 case ALPS_PROTO_V7: 2631 priv->hw_init = alps_hw_init_v7; 2632 priv->process_packet = alps_process_packet_v7; 2633 priv->decode_fields = alps_decode_packet_v7; 2634 priv->set_abs_params = alps_set_abs_params_v7; 2635 priv->nibble_commands = alps_v3_nibble_commands; 2636 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2637 priv->x_max = 0xfff; 2638 priv->y_max = 0x7ff; 2639 2640 if (priv->fw_ver[1] != 0xba) 2641 priv->flags |= ALPS_BUTTONPAD; 2642 2643 break; 2644 2645 case ALPS_PROTO_V8: 2646 priv->hw_init = alps_hw_init_ss4_v2; 2647 priv->process_packet = alps_process_packet_ss4_v2; 2648 priv->decode_fields = alps_decode_ss4_v2; 2649 priv->set_abs_params = alps_set_abs_params_ss4_v2; 2650 priv->nibble_commands = alps_v3_nibble_commands; 2651 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2652 2653 if (alps_set_defaults_ss4_v2(psmouse, priv)) 2654 return -EIO; 2655 2656 break; 2657 } 2658 2659 return 0; 2660 } 2661 2662 static const struct alps_protocol_info *alps_match_table(unsigned char *e7, 2663 unsigned char *ec) 2664 { 2665 const struct alps_model_info *model; 2666 int i; 2667 2668 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) { 2669 model = &alps_model_data[i]; 2670 2671 if (!memcmp(e7, model->signature, sizeof(model->signature)) && 2672 (!model->command_mode_resp || 2673 model->command_mode_resp == ec[2])) { 2674 2675 return &model->protocol_info; 2676 } 2677 } 2678 2679 return NULL; 2680 } 2681 2682 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv) 2683 { 2684 const struct alps_protocol_info *protocol; 2685 unsigned char e6[4], e7[4], ec[4]; 2686 int error; 2687 2688 /* 2689 * First try "E6 report". 2690 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed. 2691 * The bits 0-2 of the first byte will be 1s if some buttons are 2692 * pressed. 2693 */ 2694 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2695 PSMOUSE_CMD_SETSCALE11, e6)) 2696 return -EIO; 2697 2698 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100)) 2699 return -EINVAL; 2700 2701 /* 2702 * Now get the "E7" and "EC" reports. These will uniquely identify 2703 * most ALPS touchpads. 2704 */ 2705 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2706 PSMOUSE_CMD_SETSCALE21, e7) || 2707 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2708 PSMOUSE_CMD_RESET_WRAP, ec) || 2709 alps_exit_command_mode(psmouse)) 2710 return -EIO; 2711 2712 protocol = alps_match_table(e7, ec); 2713 if (!protocol) { 2714 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 && 2715 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) { 2716 protocol = &alps_v5_protocol_data; 2717 } else if (ec[0] == 0x88 && 2718 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) { 2719 protocol = &alps_v7_protocol_data; 2720 } else if (ec[0] == 0x88 && ec[1] == 0x08) { 2721 protocol = &alps_v3_rushmore_data; 2722 } else if (ec[0] == 0x88 && ec[1] == 0x07 && 2723 ec[2] >= 0x90 && ec[2] <= 0x9d) { 2724 protocol = &alps_v3_protocol_data; 2725 } else if (e7[0] == 0x73 && e7[1] == 0x03 && 2726 e7[2] == 0x14 && ec[1] == 0x02) { 2727 protocol = &alps_v8_protocol_data; 2728 } else { 2729 psmouse_dbg(psmouse, 2730 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec); 2731 return -EINVAL; 2732 } 2733 } 2734 2735 if (priv) { 2736 /* Save the Firmware version */ 2737 memcpy(priv->fw_ver, ec, 3); 2738 error = alps_set_protocol(psmouse, priv, protocol); 2739 if (error) 2740 return error; 2741 } 2742 2743 return 0; 2744 } 2745 2746 static int alps_reconnect(struct psmouse *psmouse) 2747 { 2748 struct alps_data *priv = psmouse->private; 2749 2750 psmouse_reset(psmouse); 2751 2752 if (alps_identify(psmouse, priv) < 0) 2753 return -1; 2754 2755 return priv->hw_init(psmouse); 2756 } 2757 2758 static void alps_disconnect(struct psmouse *psmouse) 2759 { 2760 struct alps_data *priv = psmouse->private; 2761 2762 psmouse_reset(psmouse); 2763 del_timer_sync(&priv->timer); 2764 if (priv->dev2) 2765 input_unregister_device(priv->dev2); 2766 if (!IS_ERR_OR_NULL(priv->dev3)) 2767 input_unregister_device(priv->dev3); 2768 kfree(priv); 2769 } 2770 2771 static void alps_set_abs_params_st(struct alps_data *priv, 2772 struct input_dev *dev1) 2773 { 2774 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0); 2775 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0); 2776 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2777 } 2778 2779 static void alps_set_abs_params_mt_common(struct alps_data *priv, 2780 struct input_dev *dev1) 2781 { 2782 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); 2783 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); 2784 2785 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res); 2786 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res); 2787 2788 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit); 2789 set_bit(BTN_TOOL_QUADTAP, dev1->keybit); 2790 } 2791 2792 static void alps_set_abs_params_semi_mt(struct alps_data *priv, 2793 struct input_dev *dev1) 2794 { 2795 alps_set_abs_params_mt_common(priv, dev1); 2796 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2797 2798 input_mt_init_slots(dev1, MAX_TOUCHES, 2799 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2800 INPUT_MT_SEMI_MT); 2801 } 2802 2803 static void alps_set_abs_params_v7(struct alps_data *priv, 2804 struct input_dev *dev1) 2805 { 2806 alps_set_abs_params_mt_common(priv, dev1); 2807 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2808 2809 input_mt_init_slots(dev1, MAX_TOUCHES, 2810 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2811 INPUT_MT_TRACK); 2812 2813 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2814 } 2815 2816 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 2817 struct input_dev *dev1) 2818 { 2819 alps_set_abs_params_mt_common(priv, dev1); 2820 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2821 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2822 2823 input_mt_init_slots(dev1, MAX_TOUCHES, 2824 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2825 INPUT_MT_TRACK); 2826 } 2827 2828 int alps_init(struct psmouse *psmouse) 2829 { 2830 struct alps_data *priv = psmouse->private; 2831 struct input_dev *dev1 = psmouse->dev; 2832 int error; 2833 2834 error = priv->hw_init(psmouse); 2835 if (error) 2836 goto init_fail; 2837 2838 /* 2839 * Undo part of setup done for us by psmouse core since touchpad 2840 * is not a relative device. 2841 */ 2842 __clear_bit(EV_REL, dev1->evbit); 2843 __clear_bit(REL_X, dev1->relbit); 2844 __clear_bit(REL_Y, dev1->relbit); 2845 2846 /* 2847 * Now set up our capabilities. 2848 */ 2849 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY); 2850 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH); 2851 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER); 2852 dev1->keybit[BIT_WORD(BTN_LEFT)] |= 2853 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2854 2855 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS); 2856 2857 priv->set_abs_params(priv, dev1); 2858 2859 if (priv->flags & ALPS_WHEEL) { 2860 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL); 2861 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL); 2862 } 2863 2864 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 2865 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD); 2866 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK); 2867 } 2868 2869 if (priv->flags & ALPS_FOUR_BUTTONS) { 2870 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0); 2871 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1); 2872 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2); 2873 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3); 2874 } else if (priv->flags & ALPS_BUTTONPAD) { 2875 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit); 2876 clear_bit(BTN_RIGHT, dev1->keybit); 2877 } else { 2878 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE); 2879 } 2880 2881 if (priv->flags & ALPS_DUALPOINT) { 2882 struct input_dev *dev2; 2883 2884 dev2 = input_allocate_device(); 2885 if (!dev2) { 2886 psmouse_err(psmouse, 2887 "failed to allocate trackstick device\n"); 2888 error = -ENOMEM; 2889 goto init_fail; 2890 } 2891 2892 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1", 2893 psmouse->ps2dev.serio->phys); 2894 dev2->phys = priv->phys2; 2895 2896 /* 2897 * format of input device name is: "protocol vendor name" 2898 * see function psmouse_switch_protocol() in psmouse-base.c 2899 */ 2900 dev2->name = "AlpsPS/2 ALPS DualPoint Stick"; 2901 2902 dev2->id.bustype = BUS_I8042; 2903 dev2->id.vendor = 0x0002; 2904 dev2->id.product = PSMOUSE_ALPS; 2905 dev2->id.version = priv->proto_version; 2906 dev2->dev.parent = &psmouse->ps2dev.serio->dev; 2907 2908 input_set_capability(dev2, EV_REL, REL_X); 2909 input_set_capability(dev2, EV_REL, REL_Y); 2910 input_set_capability(dev2, EV_KEY, BTN_LEFT); 2911 input_set_capability(dev2, EV_KEY, BTN_RIGHT); 2912 input_set_capability(dev2, EV_KEY, BTN_MIDDLE); 2913 2914 __set_bit(INPUT_PROP_POINTER, dev2->propbit); 2915 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit); 2916 2917 error = input_register_device(dev2); 2918 if (error) { 2919 psmouse_err(psmouse, 2920 "failed to register trackstick device: %d\n", 2921 error); 2922 input_free_device(dev2); 2923 goto init_fail; 2924 } 2925 2926 priv->dev2 = dev2; 2927 } 2928 2929 priv->psmouse = psmouse; 2930 2931 INIT_DELAYED_WORK(&priv->dev3_register_work, 2932 alps_register_bare_ps2_mouse); 2933 2934 psmouse->protocol_handler = alps_process_byte; 2935 psmouse->poll = alps_poll; 2936 psmouse->disconnect = alps_disconnect; 2937 psmouse->reconnect = alps_reconnect; 2938 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6; 2939 2940 /* We are having trouble resyncing ALPS touchpads so disable it for now */ 2941 psmouse->resync_time = 0; 2942 2943 /* Allow 2 invalid packets without resetting device */ 2944 psmouse->resetafter = psmouse->pktsize * 2; 2945 2946 return 0; 2947 2948 init_fail: 2949 psmouse_reset(psmouse); 2950 /* 2951 * Even though we did not allocate psmouse->private we do free 2952 * it here. 2953 */ 2954 kfree(psmouse->private); 2955 psmouse->private = NULL; 2956 return error; 2957 } 2958 2959 int alps_detect(struct psmouse *psmouse, bool set_properties) 2960 { 2961 struct alps_data *priv; 2962 int error; 2963 2964 error = alps_identify(psmouse, NULL); 2965 if (error) 2966 return error; 2967 2968 /* 2969 * Reset the device to make sure it is fully operational: 2970 * on some laptops, like certain Dell Latitudes, we may 2971 * fail to properly detect presence of trackstick if device 2972 * has not been reset. 2973 */ 2974 psmouse_reset(psmouse); 2975 2976 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL); 2977 if (!priv) 2978 return -ENOMEM; 2979 2980 error = alps_identify(psmouse, priv); 2981 if (error) { 2982 kfree(priv); 2983 return error; 2984 } 2985 2986 if (set_properties) { 2987 psmouse->vendor = "ALPS"; 2988 psmouse->name = priv->flags & ALPS_DUALPOINT ? 2989 "DualPoint TouchPad" : "GlidePoint"; 2990 psmouse->model = priv->proto_version; 2991 } else { 2992 /* 2993 * Destroy alps_data structure we allocated earlier since 2994 * this was just a "trial run". Otherwise we'll keep it 2995 * to be used by alps_init() which has to be called if 2996 * we succeed and set_properties is true. 2997 */ 2998 kfree(priv); 2999 psmouse->private = NULL; 3000 } 3001 3002 return 0; 3003 } 3004 3005