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 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_CMD_NIBBLE_10 0x01f2 31 32 #define ALPS_REG_BASE_RUSHMORE 0xc2c0 33 #define ALPS_REG_BASE_PINNACLE 0x0000 34 35 static const struct alps_nibble_commands alps_v3_nibble_commands[] = { 36 { PSMOUSE_CMD_SETPOLL, 0x00 }, /* 0 */ 37 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */ 38 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */ 39 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */ 40 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */ 41 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */ 42 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */ 43 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */ 44 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */ 45 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */ 46 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */ 47 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */ 48 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */ 49 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */ 50 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */ 51 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 52 }; 53 54 static const struct alps_nibble_commands alps_v4_nibble_commands[] = { 55 { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */ 56 { PSMOUSE_CMD_RESET_DIS, 0x00 }, /* 1 */ 57 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* 2 */ 58 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 3 */ 59 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 4 */ 60 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 5 */ 61 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 6 */ 62 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 7 */ 63 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 8 */ 64 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 9 */ 65 { ALPS_CMD_NIBBLE_10, 0x00 }, /* a */ 66 { PSMOUSE_CMD_SETRES, 0x00 }, /* b */ 67 { PSMOUSE_CMD_SETRES, 0x01 }, /* c */ 68 { PSMOUSE_CMD_SETRES, 0x02 }, /* d */ 69 { PSMOUSE_CMD_SETRES, 0x03 }, /* e */ 70 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 71 }; 72 73 static const struct alps_nibble_commands alps_v6_nibble_commands[] = { 74 { PSMOUSE_CMD_ENABLE, 0x00 }, /* 0 */ 75 { PSMOUSE_CMD_SETRATE, 0x0a }, /* 1 */ 76 { PSMOUSE_CMD_SETRATE, 0x14 }, /* 2 */ 77 { PSMOUSE_CMD_SETRATE, 0x28 }, /* 3 */ 78 { PSMOUSE_CMD_SETRATE, 0x3c }, /* 4 */ 79 { PSMOUSE_CMD_SETRATE, 0x50 }, /* 5 */ 80 { PSMOUSE_CMD_SETRATE, 0x64 }, /* 6 */ 81 { PSMOUSE_CMD_SETRATE, 0xc8 }, /* 7 */ 82 { PSMOUSE_CMD_GETID, 0x00 }, /* 8 */ 83 { PSMOUSE_CMD_GETINFO, 0x00 }, /* 9 */ 84 { PSMOUSE_CMD_SETRES, 0x00 }, /* a */ 85 { PSMOUSE_CMD_SETRES, 0x01 }, /* b */ 86 { PSMOUSE_CMD_SETRES, 0x02 }, /* c */ 87 { PSMOUSE_CMD_SETRES, 0x03 }, /* d */ 88 { PSMOUSE_CMD_SETSCALE21, 0x00 }, /* e */ 89 { PSMOUSE_CMD_SETSCALE11, 0x00 }, /* f */ 90 }; 91 92 93 #define ALPS_DUALPOINT 0x02 /* touchpad has trackstick */ 94 #define ALPS_PASS 0x04 /* device has a pass-through port */ 95 96 #define ALPS_WHEEL 0x08 /* hardware wheel present */ 97 #define ALPS_FW_BK_1 0x10 /* front & back buttons present */ 98 #define ALPS_FW_BK_2 0x20 /* front & back buttons present */ 99 #define ALPS_FOUR_BUTTONS 0x40 /* 4 direction button present */ 100 #define ALPS_PS2_INTERLEAVED 0x80 /* 3-byte PS/2 packet interleaved with 101 6-byte ALPS packet */ 102 #define ALPS_BUTTONPAD 0x200 /* device is a clickpad */ 103 104 static const struct alps_model_info alps_model_data[] = { 105 { { 0x32, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Toshiba Salellite Pro M10 */ 106 { { 0x33, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } }, /* UMAX-530T */ 107 { { 0x53, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 108 { { 0x53, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 109 { { 0x60, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, /* HP ze1115 */ 110 { { 0x63, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 111 { { 0x63, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 112 { { 0x63, 0x02, 0x28 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Fujitsu Siemens S6010 */ 113 { { 0x63, 0x02, 0x3c }, 0x00, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } }, /* Toshiba Satellite S2400-103 */ 114 { { 0x63, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } }, /* NEC Versa L320 */ 115 { { 0x63, 0x02, 0x64 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 116 { { 0x63, 0x03, 0xc8 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D800 */ 117 { { 0x73, 0x00, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } }, /* ThinkPad R61 8918-5QG */ 118 { { 0x73, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 119 { { 0x73, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Ahtec Laptop */ 120 121 /* 122 * XXX This entry is suspicious. First byte has zero lower nibble, 123 * which is what a normal mouse would report. Also, the value 0x0e 124 * isn't valid per PS/2 spec. 125 */ 126 { { 0x20, 0x02, 0x0e }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 127 128 { { 0x22, 0x02, 0x0a }, 0x00, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 129 { { 0x22, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D600 */ 130 /* Dell Latitude E5500, E6400, E6500, Precision M4400 */ 131 { { 0x62, 0x02, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, 132 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, 133 { { 0x73, 0x00, 0x14 }, 0x00, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } }, /* Dell XT2 */ 134 { { 0x73, 0x02, 0x50 }, 0x00, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } }, /* Dell Vostro 1400 */ 135 { { 0x52, 0x01, 0x14 }, 0x00, { ALPS_PROTO_V2, 0xff, 0xff, 136 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Toshiba Tecra A11-11L */ 137 { { 0x73, 0x02, 0x64 }, 0x8a, { ALPS_PROTO_V4, 0x8f, 0x8f, 0 } }, 138 }; 139 140 static const struct alps_protocol_info alps_v3_protocol_data = { 141 ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT 142 }; 143 144 static const struct alps_protocol_info alps_v3_rushmore_data = { 145 ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT 146 }; 147 148 static const struct alps_protocol_info alps_v5_protocol_data = { 149 ALPS_PROTO_V5, 0xc8, 0xd8, 0 150 }; 151 152 static const struct alps_protocol_info alps_v7_protocol_data = { 153 ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT 154 }; 155 156 static const struct alps_protocol_info alps_v8_protocol_data = { 157 ALPS_PROTO_V8, 0x18, 0x18, 0 158 }; 159 160 static void alps_set_abs_params_st(struct alps_data *priv, 161 struct input_dev *dev1); 162 static void alps_set_abs_params_mt(struct alps_data *priv, 163 struct input_dev *dev1); 164 static void alps_set_abs_params_v7(struct alps_data *priv, 165 struct input_dev *dev1); 166 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 167 struct input_dev *dev1); 168 169 /* Packet formats are described in Documentation/input/alps.txt */ 170 171 static bool alps_is_valid_first_byte(struct alps_data *priv, 172 unsigned char data) 173 { 174 return (data & priv->mask0) == priv->byte0; 175 } 176 177 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2, 178 int left, int right, int middle) 179 { 180 struct input_dev *dev; 181 182 /* 183 * If shared button has already been reported on the 184 * other device (dev2) then this event should be also 185 * sent through that device. 186 */ 187 dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1; 188 input_report_key(dev, BTN_LEFT, left); 189 190 dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1; 191 input_report_key(dev, BTN_RIGHT, right); 192 193 dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1; 194 input_report_key(dev, BTN_MIDDLE, middle); 195 196 /* 197 * Sync the _other_ device now, we'll do the first 198 * device later once we report the rest of the events. 199 */ 200 if (dev2) 201 input_sync(dev2); 202 } 203 204 static void alps_process_packet_v1_v2(struct psmouse *psmouse) 205 { 206 struct alps_data *priv = psmouse->private; 207 unsigned char *packet = psmouse->packet; 208 struct input_dev *dev = psmouse->dev; 209 struct input_dev *dev2 = priv->dev2; 210 int x, y, z, ges, fin, left, right, middle; 211 int back = 0, forward = 0; 212 213 if (priv->proto_version == ALPS_PROTO_V1) { 214 left = packet[2] & 0x10; 215 right = packet[2] & 0x08; 216 middle = 0; 217 x = packet[1] | ((packet[0] & 0x07) << 7); 218 y = packet[4] | ((packet[3] & 0x07) << 7); 219 z = packet[5]; 220 } else { 221 left = packet[3] & 1; 222 right = packet[3] & 2; 223 middle = packet[3] & 4; 224 x = packet[1] | ((packet[2] & 0x78) << (7 - 3)); 225 y = packet[4] | ((packet[3] & 0x70) << (7 - 4)); 226 z = packet[5]; 227 } 228 229 if (priv->flags & ALPS_FW_BK_1) { 230 back = packet[0] & 0x10; 231 forward = packet[2] & 4; 232 } 233 234 if (priv->flags & ALPS_FW_BK_2) { 235 back = packet[3] & 4; 236 forward = packet[2] & 4; 237 if ((middle = forward && back)) 238 forward = back = 0; 239 } 240 241 ges = packet[2] & 1; 242 fin = packet[2] & 2; 243 244 if ((priv->flags & ALPS_DUALPOINT) && z == 127) { 245 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x)); 246 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y)); 247 248 alps_report_buttons(dev2, dev, left, right, middle); 249 250 input_sync(dev2); 251 return; 252 } 253 254 /* Non interleaved V2 dualpoint has separate stick button bits */ 255 if (priv->proto_version == ALPS_PROTO_V2 && 256 priv->flags == (ALPS_PASS | ALPS_DUALPOINT)) { 257 left |= packet[0] & 1; 258 right |= packet[0] & 2; 259 middle |= packet[0] & 4; 260 } 261 262 alps_report_buttons(dev, dev2, left, right, middle); 263 264 /* Convert hardware tap to a reasonable Z value */ 265 if (ges && !fin) 266 z = 40; 267 268 /* 269 * A "tap and drag" operation is reported by the hardware as a transition 270 * from (!fin && ges) to (fin && ges). This should be translated to the 271 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually. 272 */ 273 if (ges && fin && !priv->prev_fin) { 274 input_report_abs(dev, ABS_X, x); 275 input_report_abs(dev, ABS_Y, y); 276 input_report_abs(dev, ABS_PRESSURE, 0); 277 input_report_key(dev, BTN_TOOL_FINGER, 0); 278 input_sync(dev); 279 } 280 priv->prev_fin = fin; 281 282 if (z > 30) 283 input_report_key(dev, BTN_TOUCH, 1); 284 if (z < 25) 285 input_report_key(dev, BTN_TOUCH, 0); 286 287 if (z > 0) { 288 input_report_abs(dev, ABS_X, x); 289 input_report_abs(dev, ABS_Y, y); 290 } 291 292 input_report_abs(dev, ABS_PRESSURE, z); 293 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 294 295 if (priv->flags & ALPS_WHEEL) 296 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07)); 297 298 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 299 input_report_key(dev, BTN_FORWARD, forward); 300 input_report_key(dev, BTN_BACK, back); 301 } 302 303 if (priv->flags & ALPS_FOUR_BUTTONS) { 304 input_report_key(dev, BTN_0, packet[2] & 4); 305 input_report_key(dev, BTN_1, packet[0] & 0x10); 306 input_report_key(dev, BTN_2, packet[3] & 4); 307 input_report_key(dev, BTN_3, packet[0] & 0x20); 308 } 309 310 input_sync(dev); 311 } 312 313 /* 314 * Process bitmap data for V5 protocols. Return value is null. 315 * 316 * The bitmaps don't have enough data to track fingers, so this function 317 * only generates points representing a bounding box of at most two contacts. 318 * These two points are returned in fields->mt. 319 */ 320 static void alps_process_bitmap_dolphin(struct alps_data *priv, 321 struct alps_fields *fields) 322 { 323 int box_middle_x, box_middle_y; 324 unsigned int x_map, y_map; 325 unsigned char start_bit, end_bit; 326 unsigned char x_msb, x_lsb, y_msb, y_lsb; 327 328 x_map = fields->x_map; 329 y_map = fields->y_map; 330 331 if (!x_map || !y_map) 332 return; 333 334 /* Get Most-significant and Least-significant bit */ 335 x_msb = fls(x_map); 336 x_lsb = ffs(x_map); 337 y_msb = fls(y_map); 338 y_lsb = ffs(y_map); 339 340 /* Most-significant bit should never exceed max sensor line number */ 341 if (x_msb > priv->x_bits || y_msb > priv->y_bits) 342 return; 343 344 if (fields->fingers > 1) { 345 start_bit = priv->x_bits - x_msb; 346 end_bit = priv->x_bits - x_lsb; 347 box_middle_x = (priv->x_max * (start_bit + end_bit)) / 348 (2 * (priv->x_bits - 1)); 349 350 start_bit = y_lsb - 1; 351 end_bit = y_msb - 1; 352 box_middle_y = (priv->y_max * (start_bit + end_bit)) / 353 (2 * (priv->y_bits - 1)); 354 fields->mt[0] = fields->st; 355 fields->mt[1].x = 2 * box_middle_x - fields->mt[0].x; 356 fields->mt[1].y = 2 * box_middle_y - fields->mt[0].y; 357 } 358 } 359 360 static void alps_get_bitmap_points(unsigned int map, 361 struct alps_bitmap_point *low, 362 struct alps_bitmap_point *high, 363 int *fingers) 364 { 365 struct alps_bitmap_point *point; 366 int i, bit, prev_bit = 0; 367 368 point = low; 369 for (i = 0; map != 0; i++, map >>= 1) { 370 bit = map & 1; 371 if (bit) { 372 if (!prev_bit) { 373 point->start_bit = i; 374 point->num_bits = 0; 375 (*fingers)++; 376 } 377 point->num_bits++; 378 } else { 379 if (prev_bit) 380 point = high; 381 } 382 prev_bit = bit; 383 } 384 } 385 386 /* 387 * Process bitmap data from v3 and v4 protocols. Returns the number of 388 * fingers detected. A return value of 0 means at least one of the 389 * bitmaps was empty. 390 * 391 * The bitmaps don't have enough data to track fingers, so this function 392 * only generates points representing a bounding box of all contacts. 393 * These points are returned in fields->mt when the return value 394 * is greater than 0. 395 */ 396 static int alps_process_bitmap(struct alps_data *priv, 397 struct alps_fields *fields) 398 { 399 int i, fingers_x = 0, fingers_y = 0, fingers; 400 struct alps_bitmap_point x_low = {0,}, x_high = {0,}; 401 struct alps_bitmap_point y_low = {0,}, y_high = {0,}; 402 403 if (!fields->x_map || !fields->y_map) 404 return 0; 405 406 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x); 407 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y); 408 409 /* 410 * Fingers can overlap, so we use the maximum count of fingers 411 * on either axis as the finger count. 412 */ 413 fingers = max(fingers_x, fingers_y); 414 415 /* 416 * If an axis reports only a single contact, we have overlapping or 417 * adjacent fingers. Divide the single contact between the two points. 418 */ 419 if (fingers_x == 1) { 420 i = (x_low.num_bits - 1) / 2; 421 x_low.num_bits = x_low.num_bits - i; 422 x_high.start_bit = x_low.start_bit + i; 423 x_high.num_bits = max(i, 1); 424 } 425 if (fingers_y == 1) { 426 i = (y_low.num_bits - 1) / 2; 427 y_low.num_bits = y_low.num_bits - i; 428 y_high.start_bit = y_low.start_bit + i; 429 y_high.num_bits = max(i, 1); 430 } 431 432 fields->mt[0].x = 433 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) / 434 (2 * (priv->x_bits - 1)); 435 fields->mt[0].y = 436 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) / 437 (2 * (priv->y_bits - 1)); 438 439 fields->mt[1].x = 440 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) / 441 (2 * (priv->x_bits - 1)); 442 fields->mt[1].y = 443 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) / 444 (2 * (priv->y_bits - 1)); 445 446 /* y-bitmap order is reversed, except on rushmore */ 447 if (priv->proto_version != ALPS_PROTO_V3_RUSHMORE) { 448 fields->mt[0].y = priv->y_max - fields->mt[0].y; 449 fields->mt[1].y = priv->y_max - fields->mt[1].y; 450 } 451 452 return fingers; 453 } 454 455 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y) 456 { 457 input_mt_slot(dev, slot); 458 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 459 input_report_abs(dev, ABS_MT_POSITION_X, x); 460 input_report_abs(dev, ABS_MT_POSITION_Y, y); 461 } 462 463 static void alps_report_mt_data(struct psmouse *psmouse, int n) 464 { 465 struct alps_data *priv = psmouse->private; 466 struct input_dev *dev = psmouse->dev; 467 struct alps_fields *f = &priv->f; 468 int i, slot[MAX_TOUCHES]; 469 470 input_mt_assign_slots(dev, slot, f->mt, n, 0); 471 for (i = 0; i < n; i++) 472 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y); 473 474 input_mt_sync_frame(dev); 475 } 476 477 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers) 478 { 479 struct alps_data *priv = psmouse->private; 480 struct input_dev *dev = psmouse->dev; 481 struct alps_fields *f = &priv->f; 482 483 /* Use st data when we don't have mt data */ 484 if (fingers < 2) { 485 f->mt[0].x = f->st.x; 486 f->mt[0].y = f->st.y; 487 fingers = f->pressure > 0 ? 1 : 0; 488 } 489 490 alps_report_mt_data(psmouse, (fingers <= 2) ? fingers : 2); 491 492 input_mt_report_finger_count(dev, fingers); 493 494 input_report_key(dev, BTN_LEFT, f->left); 495 input_report_key(dev, BTN_RIGHT, f->right); 496 input_report_key(dev, BTN_MIDDLE, f->middle); 497 498 input_report_abs(dev, ABS_PRESSURE, f->pressure); 499 500 input_sync(dev); 501 } 502 503 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse) 504 { 505 struct alps_data *priv = psmouse->private; 506 unsigned char *packet = psmouse->packet; 507 struct input_dev *dev = priv->dev2; 508 int x, y, z, left, right, middle; 509 510 /* It should be a DualPoint when received trackstick packet */ 511 if (!(priv->flags & ALPS_DUALPOINT)) { 512 psmouse_warn(psmouse, 513 "Rejected trackstick packet from non DualPoint device"); 514 return; 515 } 516 517 /* Sanity check packet */ 518 if (!(packet[0] & 0x40)) { 519 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n"); 520 return; 521 } 522 523 /* 524 * There's a special packet that seems to indicate the end 525 * of a stream of trackstick data. Filter these out. 526 */ 527 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f) 528 return; 529 530 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f)); 531 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f)); 532 z = (packet[4] & 0x7c) >> 2; 533 534 /* 535 * The x and y values tend to be quite large, and when used 536 * alone the trackstick is difficult to use. Scale them down 537 * to compensate. 538 */ 539 x /= 8; 540 y /= 8; 541 542 input_report_rel(dev, REL_X, x); 543 input_report_rel(dev, REL_Y, -y); 544 545 /* 546 * Most ALPS models report the trackstick buttons in the touchpad 547 * packets, but a few report them here. No reliable way has been 548 * found to differentiate between the models upfront, so we enable 549 * the quirk in response to seeing a button press in the trackstick 550 * packet. 551 */ 552 left = packet[3] & 0x01; 553 right = packet[3] & 0x02; 554 middle = packet[3] & 0x04; 555 556 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) && 557 (left || right || middle)) 558 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS; 559 560 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) { 561 input_report_key(dev, BTN_LEFT, left); 562 input_report_key(dev, BTN_RIGHT, right); 563 input_report_key(dev, BTN_MIDDLE, middle); 564 } 565 566 input_sync(dev); 567 return; 568 } 569 570 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p) 571 { 572 f->left = !!(p[3] & 0x01); 573 f->right = !!(p[3] & 0x02); 574 f->middle = !!(p[3] & 0x04); 575 576 f->ts_left = !!(p[3] & 0x10); 577 f->ts_right = !!(p[3] & 0x20); 578 f->ts_middle = !!(p[3] & 0x40); 579 } 580 581 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p, 582 struct psmouse *psmouse) 583 { 584 f->first_mp = !!(p[4] & 0x40); 585 f->is_mp = !!(p[0] & 0x40); 586 587 f->fingers = (p[5] & 0x3) + 1; 588 f->x_map = ((p[4] & 0x7e) << 8) | 589 ((p[1] & 0x7f) << 2) | 590 ((p[0] & 0x30) >> 4); 591 f->y_map = ((p[3] & 0x70) << 4) | 592 ((p[2] & 0x7f) << 1) | 593 (p[4] & 0x01); 594 595 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) | 596 ((p[0] & 0x30) >> 4); 597 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f); 598 f->pressure = p[5] & 0x7f; 599 600 alps_decode_buttons_v3(f, p); 601 602 return 0; 603 } 604 605 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p, 606 struct psmouse *psmouse) 607 { 608 alps_decode_pinnacle(f, p, psmouse); 609 610 /* Rushmore's packet decode has a bit difference with Pinnacle's */ 611 f->is_mp = !!(p[5] & 0x40); 612 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1; 613 f->x_map |= (p[5] & 0x10) << 11; 614 f->y_map |= (p[5] & 0x20) << 6; 615 616 return 0; 617 } 618 619 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p, 620 struct psmouse *psmouse) 621 { 622 u64 palm_data = 0; 623 struct alps_data *priv = psmouse->private; 624 625 f->first_mp = !!(p[0] & 0x02); 626 f->is_mp = !!(p[0] & 0x20); 627 628 if (!f->is_mp) { 629 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7)); 630 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3)); 631 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f; 632 alps_decode_buttons_v3(f, p); 633 } else { 634 f->fingers = ((p[0] & 0x6) >> 1 | 635 (p[0] & 0x10) >> 2); 636 637 palm_data = (p[1] & 0x7f) | 638 ((p[2] & 0x7f) << 7) | 639 ((p[4] & 0x7f) << 14) | 640 ((p[5] & 0x7f) << 21) | 641 ((p[3] & 0x07) << 28) | 642 (((u64)p[3] & 0x70) << 27) | 643 (((u64)p[0] & 0x01) << 34); 644 645 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */ 646 f->y_map = palm_data & (BIT(priv->y_bits) - 1); 647 648 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */ 649 f->x_map = (palm_data >> priv->y_bits) & 650 (BIT(priv->x_bits) - 1); 651 } 652 653 return 0; 654 } 655 656 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse) 657 { 658 struct alps_data *priv = psmouse->private; 659 unsigned char *packet = psmouse->packet; 660 struct input_dev *dev2 = priv->dev2; 661 struct alps_fields *f = &priv->f; 662 int fingers = 0; 663 664 memset(f, 0, sizeof(*f)); 665 666 priv->decode_fields(f, packet, psmouse); 667 668 /* 669 * There's no single feature of touchpad position and bitmap packets 670 * that can be used to distinguish between them. We rely on the fact 671 * that a bitmap packet should always follow a position packet with 672 * bit 6 of packet[4] set. 673 */ 674 if (priv->multi_packet) { 675 /* 676 * Sometimes a position packet will indicate a multi-packet 677 * sequence, but then what follows is another position 678 * packet. Check for this, and when it happens process the 679 * position packet as usual. 680 */ 681 if (f->is_mp) { 682 fingers = f->fingers; 683 if (priv->proto_version == ALPS_PROTO_V3 || 684 priv->proto_version == ALPS_PROTO_V3_RUSHMORE) { 685 if (alps_process_bitmap(priv, f) == 0) 686 fingers = 0; /* Use st data */ 687 688 /* Now process position packet */ 689 priv->decode_fields(f, priv->multi_data, 690 psmouse); 691 } else { 692 /* 693 * Because Dolphin uses position packet's 694 * coordinate data as Pt1 and uses it to 695 * calculate Pt2, so we need to do position 696 * packet decode first. 697 */ 698 priv->decode_fields(f, priv->multi_data, 699 psmouse); 700 701 /* 702 * Since Dolphin's finger number is reliable, 703 * there is no need to compare with bmap_fn. 704 */ 705 alps_process_bitmap_dolphin(priv, f); 706 } 707 } else { 708 priv->multi_packet = 0; 709 } 710 } 711 712 /* 713 * Bit 6 of byte 0 is not usually set in position packets. The only 714 * times it seems to be set is in situations where the data is 715 * suspect anyway, e.g. a palm resting flat on the touchpad. Given 716 * this combined with the fact that this bit is useful for filtering 717 * out misidentified bitmap packets, we reject anything with this 718 * bit set. 719 */ 720 if (f->is_mp) 721 return; 722 723 if (!priv->multi_packet && f->first_mp) { 724 priv->multi_packet = 1; 725 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 726 return; 727 } 728 729 priv->multi_packet = 0; 730 731 /* 732 * Sometimes the hardware sends a single packet with z = 0 733 * in the middle of a stream. Real releases generate packets 734 * with x, y, and z all zero, so these seem to be flukes. 735 * Ignore them. 736 */ 737 if (f->st.x && f->st.y && !f->pressure) 738 return; 739 740 alps_report_semi_mt_data(psmouse, fingers); 741 742 if ((priv->flags & ALPS_DUALPOINT) && 743 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) { 744 input_report_key(dev2, BTN_LEFT, f->ts_left); 745 input_report_key(dev2, BTN_RIGHT, f->ts_right); 746 input_report_key(dev2, BTN_MIDDLE, f->ts_middle); 747 input_sync(dev2); 748 } 749 } 750 751 static void alps_process_packet_v3(struct psmouse *psmouse) 752 { 753 unsigned char *packet = psmouse->packet; 754 755 /* 756 * v3 protocol packets come in three types, two representing 757 * touchpad data and one representing trackstick data. 758 * Trackstick packets seem to be distinguished by always 759 * having 0x3f in the last byte. This value has never been 760 * observed in the last byte of either of the other types 761 * of packets. 762 */ 763 if (packet[5] == 0x3f) { 764 alps_process_trackstick_packet_v3(psmouse); 765 return; 766 } 767 768 alps_process_touchpad_packet_v3_v5(psmouse); 769 } 770 771 static void alps_process_packet_v6(struct psmouse *psmouse) 772 { 773 struct alps_data *priv = psmouse->private; 774 unsigned char *packet = psmouse->packet; 775 struct input_dev *dev = psmouse->dev; 776 struct input_dev *dev2 = priv->dev2; 777 int x, y, z, left, right, middle; 778 779 /* 780 * We can use Byte5 to distinguish if the packet is from Touchpad 781 * or Trackpoint. 782 * Touchpad: 0 - 0x7E 783 * Trackpoint: 0x7F 784 */ 785 if (packet[5] == 0x7F) { 786 /* It should be a DualPoint when received Trackpoint packet */ 787 if (!(priv->flags & ALPS_DUALPOINT)) { 788 psmouse_warn(psmouse, 789 "Rejected trackstick packet from non DualPoint device"); 790 return; 791 } 792 793 /* Trackpoint packet */ 794 x = packet[1] | ((packet[3] & 0x20) << 2); 795 y = packet[2] | ((packet[3] & 0x40) << 1); 796 z = packet[4]; 797 left = packet[3] & 0x01; 798 right = packet[3] & 0x02; 799 middle = packet[3] & 0x04; 800 801 /* To prevent the cursor jump when finger lifted */ 802 if (x == 0x7F && y == 0x7F && z == 0x7F) 803 x = y = z = 0; 804 805 /* Divide 4 since trackpoint's speed is too fast */ 806 input_report_rel(dev2, REL_X, (char)x / 4); 807 input_report_rel(dev2, REL_Y, -((char)y / 4)); 808 809 input_report_key(dev2, BTN_LEFT, left); 810 input_report_key(dev2, BTN_RIGHT, right); 811 input_report_key(dev2, BTN_MIDDLE, middle); 812 813 input_sync(dev2); 814 return; 815 } 816 817 /* Touchpad packet */ 818 x = packet[1] | ((packet[3] & 0x78) << 4); 819 y = packet[2] | ((packet[4] & 0x78) << 4); 820 z = packet[5]; 821 left = packet[3] & 0x01; 822 right = packet[3] & 0x02; 823 824 if (z > 30) 825 input_report_key(dev, BTN_TOUCH, 1); 826 if (z < 25) 827 input_report_key(dev, BTN_TOUCH, 0); 828 829 if (z > 0) { 830 input_report_abs(dev, ABS_X, x); 831 input_report_abs(dev, ABS_Y, y); 832 } 833 834 input_report_abs(dev, ABS_PRESSURE, z); 835 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 836 837 /* v6 touchpad does not have middle button */ 838 input_report_key(dev, BTN_LEFT, left); 839 input_report_key(dev, BTN_RIGHT, right); 840 841 input_sync(dev); 842 } 843 844 static void alps_process_packet_v4(struct psmouse *psmouse) 845 { 846 struct alps_data *priv = psmouse->private; 847 unsigned char *packet = psmouse->packet; 848 struct alps_fields *f = &priv->f; 849 int offset; 850 851 /* 852 * v4 has a 6-byte encoding for bitmap data, but this data is 853 * broken up between 3 normal packets. Use priv->multi_packet to 854 * track our position in the bitmap packet. 855 */ 856 if (packet[6] & 0x40) { 857 /* sync, reset position */ 858 priv->multi_packet = 0; 859 } 860 861 if (WARN_ON_ONCE(priv->multi_packet > 2)) 862 return; 863 864 offset = 2 * priv->multi_packet; 865 priv->multi_data[offset] = packet[6]; 866 priv->multi_data[offset + 1] = packet[7]; 867 868 if (++priv->multi_packet > 2) { 869 priv->multi_packet = 0; 870 871 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) | 872 ((priv->multi_data[3] & 0x60) << 3) | 873 ((priv->multi_data[0] & 0x3f) << 2) | 874 ((priv->multi_data[1] & 0x60) >> 5); 875 f->y_map = ((priv->multi_data[5] & 0x01) << 10) | 876 ((priv->multi_data[3] & 0x1f) << 5) | 877 (priv->multi_data[1] & 0x1f); 878 879 f->fingers = alps_process_bitmap(priv, f); 880 } 881 882 f->left = !!(packet[4] & 0x01); 883 f->right = !!(packet[4] & 0x02); 884 885 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) | 886 ((packet[0] & 0x30) >> 4); 887 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f); 888 f->pressure = packet[5] & 0x7f; 889 890 alps_report_semi_mt_data(psmouse, f->fingers); 891 } 892 893 static bool alps_is_valid_package_v7(struct psmouse *psmouse) 894 { 895 switch (psmouse->pktcnt) { 896 case 3: 897 return (psmouse->packet[2] & 0x40) == 0x40; 898 case 4: 899 return (psmouse->packet[3] & 0x48) == 0x48; 900 case 6: 901 return (psmouse->packet[5] & 0x40) == 0x00; 902 } 903 return true; 904 } 905 906 static unsigned char alps_get_packet_id_v7(char *byte) 907 { 908 unsigned char packet_id; 909 910 if (byte[4] & 0x40) 911 packet_id = V7_PACKET_ID_TWO; 912 else if (byte[4] & 0x01) 913 packet_id = V7_PACKET_ID_MULTI; 914 else if ((byte[0] & 0x10) && !(byte[4] & 0x43)) 915 packet_id = V7_PACKET_ID_NEW; 916 else if (byte[1] == 0x00 && byte[4] == 0x00) 917 packet_id = V7_PACKET_ID_IDLE; 918 else 919 packet_id = V7_PACKET_ID_UNKNOWN; 920 921 return packet_id; 922 } 923 924 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt, 925 unsigned char *pkt, 926 unsigned char pkt_id) 927 { 928 mt[0].x = ((pkt[2] & 0x80) << 4); 929 mt[0].x |= ((pkt[2] & 0x3F) << 5); 930 mt[0].x |= ((pkt[3] & 0x30) >> 1); 931 mt[0].x |= (pkt[3] & 0x07); 932 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07); 933 934 mt[1].x = ((pkt[3] & 0x80) << 4); 935 mt[1].x |= ((pkt[4] & 0x80) << 3); 936 mt[1].x |= ((pkt[4] & 0x3F) << 4); 937 mt[1].y = ((pkt[5] & 0x80) << 3); 938 mt[1].y |= ((pkt[5] & 0x3F) << 4); 939 940 switch (pkt_id) { 941 case V7_PACKET_ID_TWO: 942 mt[1].x &= ~0x000F; 943 mt[1].y |= 0x000F; 944 /* Detect false-postive touches where x & y report max value */ 945 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) { 946 mt[1].x = 0; 947 /* y gets set to 0 at the end of this function */ 948 } 949 break; 950 951 case V7_PACKET_ID_MULTI: 952 mt[1].x &= ~0x003F; 953 mt[1].y &= ~0x0020; 954 mt[1].y |= ((pkt[4] & 0x02) << 4); 955 mt[1].y |= 0x001F; 956 break; 957 958 case V7_PACKET_ID_NEW: 959 mt[1].x &= ~0x003F; 960 mt[1].x |= (pkt[0] & 0x20); 961 mt[1].y |= 0x000F; 962 break; 963 } 964 965 mt[0].y = 0x7FF - mt[0].y; 966 mt[1].y = 0x7FF - mt[1].y; 967 } 968 969 static int alps_get_mt_count(struct input_mt_pos *mt) 970 { 971 int i, fingers = 0; 972 973 for (i = 0; i < MAX_TOUCHES; i++) { 974 if (mt[i].x != 0 || mt[i].y != 0) 975 fingers++; 976 } 977 978 return fingers; 979 } 980 981 static int alps_decode_packet_v7(struct alps_fields *f, 982 unsigned char *p, 983 struct psmouse *psmouse) 984 { 985 struct alps_data *priv = psmouse->private; 986 unsigned char pkt_id; 987 988 pkt_id = alps_get_packet_id_v7(p); 989 if (pkt_id == V7_PACKET_ID_IDLE) 990 return 0; 991 if (pkt_id == V7_PACKET_ID_UNKNOWN) 992 return -1; 993 /* 994 * NEW packets are send to indicate a discontinuity in the finger 995 * coordinate reporting. Specifically a finger may have moved from 996 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for 997 * us. 998 * 999 * NEW packets have 3 problems: 1000 * 1) They do not contain middle / right button info (on non clickpads) 1001 * this can be worked around by preserving the old button state 1002 * 2) They do not contain an accurate fingercount, and they are 1003 * typically send when the number of fingers changes. We cannot use 1004 * the old finger count as that may mismatch with the amount of 1005 * touch coordinates we've available in the NEW packet 1006 * 3) Their x data for the second touch is inaccurate leading to 1007 * a possible jump of the x coordinate by 16 units when the first 1008 * non NEW packet comes in 1009 * Since problems 2 & 3 cannot be worked around, just ignore them. 1010 */ 1011 if (pkt_id == V7_PACKET_ID_NEW) 1012 return 1; 1013 1014 alps_get_finger_coordinate_v7(f->mt, p, pkt_id); 1015 1016 if (pkt_id == V7_PACKET_ID_TWO) 1017 f->fingers = alps_get_mt_count(f->mt); 1018 else /* pkt_id == V7_PACKET_ID_MULTI */ 1019 f->fingers = 3 + (p[5] & 0x03); 1020 1021 f->left = (p[0] & 0x80) >> 7; 1022 if (priv->flags & ALPS_BUTTONPAD) { 1023 if (p[0] & 0x20) 1024 f->fingers++; 1025 if (p[0] & 0x10) 1026 f->fingers++; 1027 } else { 1028 f->right = (p[0] & 0x20) >> 5; 1029 f->middle = (p[0] & 0x10) >> 4; 1030 } 1031 1032 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */ 1033 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) { 1034 f->mt[0].x = f->mt[1].x; 1035 f->mt[0].y = f->mt[1].y; 1036 f->mt[1].x = 0; 1037 f->mt[1].y = 0; 1038 } 1039 1040 return 0; 1041 } 1042 1043 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse) 1044 { 1045 struct alps_data *priv = psmouse->private; 1046 unsigned char *packet = psmouse->packet; 1047 struct input_dev *dev2 = priv->dev2; 1048 int x, y, z, left, right, middle; 1049 1050 /* It should be a DualPoint when received trackstick packet */ 1051 if (!(priv->flags & ALPS_DUALPOINT)) { 1052 psmouse_warn(psmouse, 1053 "Rejected trackstick packet from non DualPoint device"); 1054 return; 1055 } 1056 1057 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2); 1058 y = (packet[3] & 0x07) | (packet[4] & 0xb8) | 1059 ((packet[3] & 0x20) << 1); 1060 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1); 1061 1062 left = (packet[1] & 0x01); 1063 right = (packet[1] & 0x02) >> 1; 1064 middle = (packet[1] & 0x04) >> 2; 1065 1066 input_report_rel(dev2, REL_X, (char)x); 1067 input_report_rel(dev2, REL_Y, -((char)y)); 1068 1069 input_report_key(dev2, BTN_LEFT, left); 1070 input_report_key(dev2, BTN_RIGHT, right); 1071 input_report_key(dev2, BTN_MIDDLE, middle); 1072 1073 input_sync(dev2); 1074 } 1075 1076 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse) 1077 { 1078 struct alps_data *priv = psmouse->private; 1079 struct input_dev *dev = psmouse->dev; 1080 struct alps_fields *f = &priv->f; 1081 1082 memset(f, 0, sizeof(*f)); 1083 1084 if (priv->decode_fields(f, psmouse->packet, psmouse)) 1085 return; 1086 1087 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt)); 1088 1089 input_mt_report_finger_count(dev, f->fingers); 1090 1091 input_report_key(dev, BTN_LEFT, f->left); 1092 input_report_key(dev, BTN_RIGHT, f->right); 1093 input_report_key(dev, BTN_MIDDLE, f->middle); 1094 1095 input_sync(dev); 1096 } 1097 1098 static void alps_process_packet_v7(struct psmouse *psmouse) 1099 { 1100 unsigned char *packet = psmouse->packet; 1101 1102 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06) 1103 alps_process_trackstick_packet_v7(psmouse); 1104 else 1105 alps_process_touchpad_packet_v7(psmouse); 1106 } 1107 1108 static unsigned char alps_get_pkt_id_ss4_v2(unsigned char *byte) 1109 { 1110 unsigned char pkt_id = SS4_PACKET_ID_IDLE; 1111 1112 if (byte[0] == 0x18 && byte[1] == 0x10 && byte[2] == 0x00 && 1113 (byte[3] & 0x88) == 0x08 && byte[4] == 0x10 && byte[5] == 0x00) { 1114 pkt_id = SS4_PACKET_ID_IDLE; 1115 } else if (!(byte[3] & 0x10)) { 1116 pkt_id = SS4_PACKET_ID_ONE; 1117 } else if (!(byte[3] & 0x20)) { 1118 pkt_id = SS4_PACKET_ID_TWO; 1119 } else { 1120 pkt_id = SS4_PACKET_ID_MULTI; 1121 } 1122 1123 return pkt_id; 1124 } 1125 1126 static int alps_decode_ss4_v2(struct alps_fields *f, 1127 unsigned char *p, struct psmouse *psmouse) 1128 { 1129 struct alps_data *priv = psmouse->private; 1130 unsigned char pkt_id; 1131 unsigned int no_data_x, no_data_y; 1132 1133 pkt_id = alps_get_pkt_id_ss4_v2(p); 1134 1135 /* Current packet is 1Finger coordinate packet */ 1136 switch (pkt_id) { 1137 case SS4_PACKET_ID_ONE: 1138 f->mt[0].x = SS4_1F_X_V2(p); 1139 f->mt[0].y = SS4_1F_Y_V2(p); 1140 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f; 1141 f->fingers = 1; 1142 f->first_mp = 0; 1143 f->is_mp = 0; 1144 break; 1145 1146 case SS4_PACKET_ID_TWO: 1147 if (priv->flags & ALPS_BUTTONPAD) { 1148 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0); 1149 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0); 1150 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1); 1151 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1); 1152 } else { 1153 f->mt[0].x = SS4_STD_MF_X_V2(p, 0); 1154 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0); 1155 f->mt[1].x = SS4_STD_MF_X_V2(p, 1); 1156 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1); 1157 } 1158 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0; 1159 1160 if (SS4_IS_MF_CONTINUE(p)) { 1161 f->first_mp = 1; 1162 } else { 1163 f->fingers = 2; 1164 f->first_mp = 0; 1165 } 1166 f->is_mp = 0; 1167 1168 break; 1169 1170 case SS4_PACKET_ID_MULTI: 1171 if (priv->flags & ALPS_BUTTONPAD) { 1172 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0); 1173 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0); 1174 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1); 1175 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1); 1176 no_data_x = SS4_MFPACKET_NO_AX_BL; 1177 no_data_y = SS4_MFPACKET_NO_AY_BL; 1178 } else { 1179 f->mt[2].x = SS4_STD_MF_X_V2(p, 0); 1180 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0); 1181 f->mt[3].x = SS4_STD_MF_X_V2(p, 1); 1182 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1); 1183 no_data_x = SS4_MFPACKET_NO_AX; 1184 no_data_y = SS4_MFPACKET_NO_AY; 1185 } 1186 1187 f->first_mp = 0; 1188 f->is_mp = 1; 1189 1190 if (SS4_IS_5F_DETECTED(p)) { 1191 f->fingers = 5; 1192 } else if (f->mt[3].x == no_data_x && 1193 f->mt[3].y == no_data_y) { 1194 f->mt[3].x = 0; 1195 f->mt[3].y = 0; 1196 f->fingers = 3; 1197 } else { 1198 f->fingers = 4; 1199 } 1200 break; 1201 1202 case SS4_PACKET_ID_IDLE: 1203 default: 1204 memset(f, 0, sizeof(struct alps_fields)); 1205 break; 1206 } 1207 1208 f->left = !!(SS4_BTN_V2(p) & 0x01); 1209 if (!(priv->flags & ALPS_BUTTONPAD)) { 1210 f->right = !!(SS4_BTN_V2(p) & 0x02); 1211 f->middle = !!(SS4_BTN_V2(p) & 0x04); 1212 } 1213 1214 return 0; 1215 } 1216 1217 static void alps_process_packet_ss4_v2(struct psmouse *psmouse) 1218 { 1219 struct alps_data *priv = psmouse->private; 1220 unsigned char *packet = psmouse->packet; 1221 struct input_dev *dev = psmouse->dev; 1222 struct alps_fields *f = &priv->f; 1223 1224 memset(f, 0, sizeof(struct alps_fields)); 1225 priv->decode_fields(f, packet, psmouse); 1226 if (priv->multi_packet) { 1227 /* 1228 * Sometimes the first packet will indicate a multi-packet 1229 * sequence, but sometimes the next multi-packet would not 1230 * come. Check for this, and when it happens process the 1231 * position packet as usual. 1232 */ 1233 if (f->is_mp) { 1234 /* Now process the 1st packet */ 1235 priv->decode_fields(f, priv->multi_data, psmouse); 1236 } else { 1237 priv->multi_packet = 0; 1238 } 1239 } 1240 1241 /* 1242 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet. 1243 * When it is set, it means 2nd packet comes without 1st packet come. 1244 */ 1245 if (f->is_mp) 1246 return; 1247 1248 /* Save the first packet */ 1249 if (!priv->multi_packet && f->first_mp) { 1250 priv->multi_packet = 1; 1251 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 1252 return; 1253 } 1254 1255 priv->multi_packet = 0; 1256 1257 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4); 1258 1259 input_mt_report_finger_count(dev, f->fingers); 1260 1261 input_report_key(dev, BTN_LEFT, f->left); 1262 input_report_key(dev, BTN_RIGHT, f->right); 1263 input_report_key(dev, BTN_MIDDLE, f->middle); 1264 1265 input_report_abs(dev, ABS_PRESSURE, f->pressure); 1266 input_sync(dev); 1267 } 1268 1269 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse) 1270 { 1271 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08)) 1272 return false; 1273 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0)) 1274 return false; 1275 return true; 1276 } 1277 1278 static DEFINE_MUTEX(alps_mutex); 1279 1280 static void alps_register_bare_ps2_mouse(struct work_struct *work) 1281 { 1282 struct alps_data *priv = 1283 container_of(work, struct alps_data, dev3_register_work.work); 1284 struct psmouse *psmouse = priv->psmouse; 1285 struct input_dev *dev3; 1286 int error = 0; 1287 1288 mutex_lock(&alps_mutex); 1289 1290 if (priv->dev3) 1291 goto out; 1292 1293 dev3 = input_allocate_device(); 1294 if (!dev3) { 1295 psmouse_err(psmouse, "failed to allocate secondary device\n"); 1296 error = -ENOMEM; 1297 goto out; 1298 } 1299 1300 snprintf(priv->phys3, sizeof(priv->phys3), "%s/%s", 1301 psmouse->ps2dev.serio->phys, 1302 (priv->dev2 ? "input2" : "input1")); 1303 dev3->phys = priv->phys3; 1304 1305 /* 1306 * format of input device name is: "protocol vendor name" 1307 * see function psmouse_switch_protocol() in psmouse-base.c 1308 */ 1309 dev3->name = "PS/2 ALPS Mouse"; 1310 1311 dev3->id.bustype = BUS_I8042; 1312 dev3->id.vendor = 0x0002; 1313 dev3->id.product = PSMOUSE_PS2; 1314 dev3->id.version = 0x0000; 1315 dev3->dev.parent = &psmouse->ps2dev.serio->dev; 1316 1317 input_set_capability(dev3, EV_REL, REL_X); 1318 input_set_capability(dev3, EV_REL, REL_Y); 1319 input_set_capability(dev3, EV_KEY, BTN_LEFT); 1320 input_set_capability(dev3, EV_KEY, BTN_RIGHT); 1321 input_set_capability(dev3, EV_KEY, BTN_MIDDLE); 1322 1323 __set_bit(INPUT_PROP_POINTER, dev3->propbit); 1324 1325 error = input_register_device(dev3); 1326 if (error) { 1327 psmouse_err(psmouse, 1328 "failed to register secondary device: %d\n", 1329 error); 1330 input_free_device(dev3); 1331 goto out; 1332 } 1333 1334 priv->dev3 = dev3; 1335 1336 out: 1337 /* 1338 * Save the error code so that we can detect that we 1339 * already tried to create the device. 1340 */ 1341 if (error) 1342 priv->dev3 = ERR_PTR(error); 1343 1344 mutex_unlock(&alps_mutex); 1345 } 1346 1347 static void alps_report_bare_ps2_packet(struct psmouse *psmouse, 1348 unsigned char packet[], 1349 bool report_buttons) 1350 { 1351 struct alps_data *priv = psmouse->private; 1352 struct input_dev *dev, *dev2 = NULL; 1353 1354 /* Figure out which device to use to report the bare packet */ 1355 if (priv->proto_version == ALPS_PROTO_V2 && 1356 (priv->flags & ALPS_DUALPOINT)) { 1357 /* On V2 devices the DualPoint Stick reports bare packets */ 1358 dev = priv->dev2; 1359 dev2 = psmouse->dev; 1360 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) { 1361 /* Register dev3 mouse if we received PS/2 packet first time */ 1362 if (!IS_ERR(priv->dev3)) 1363 psmouse_queue_work(psmouse, &priv->dev3_register_work, 1364 0); 1365 return; 1366 } else { 1367 dev = priv->dev3; 1368 } 1369 1370 if (report_buttons) 1371 alps_report_buttons(dev, dev2, 1372 packet[0] & 1, packet[0] & 2, packet[0] & 4); 1373 1374 input_report_rel(dev, REL_X, 1375 packet[1] ? packet[1] - ((packet[0] << 4) & 0x100) : 0); 1376 input_report_rel(dev, REL_Y, 1377 packet[2] ? ((packet[0] << 3) & 0x100) - packet[2] : 0); 1378 1379 input_sync(dev); 1380 } 1381 1382 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse) 1383 { 1384 struct alps_data *priv = psmouse->private; 1385 1386 if (psmouse->pktcnt < 6) 1387 return PSMOUSE_GOOD_DATA; 1388 1389 if (psmouse->pktcnt == 6) { 1390 /* 1391 * Start a timer to flush the packet if it ends up last 1392 * 6-byte packet in the stream. Timer needs to fire 1393 * psmouse core times out itself. 20 ms should be enough 1394 * to decide if we are getting more data or not. 1395 */ 1396 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20)); 1397 return PSMOUSE_GOOD_DATA; 1398 } 1399 1400 del_timer(&priv->timer); 1401 1402 if (psmouse->packet[6] & 0x80) { 1403 1404 /* 1405 * Highest bit is set - that means we either had 1406 * complete ALPS packet and this is start of the 1407 * next packet or we got garbage. 1408 */ 1409 1410 if (((psmouse->packet[3] | 1411 psmouse->packet[4] | 1412 psmouse->packet[5]) & 0x80) || 1413 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) { 1414 psmouse_dbg(psmouse, 1415 "refusing packet %4ph (suspected interleaved ps/2)\n", 1416 psmouse->packet + 3); 1417 return PSMOUSE_BAD_DATA; 1418 } 1419 1420 priv->process_packet(psmouse); 1421 1422 /* Continue with the next packet */ 1423 psmouse->packet[0] = psmouse->packet[6]; 1424 psmouse->pktcnt = 1; 1425 1426 } else { 1427 1428 /* 1429 * High bit is 0 - that means that we indeed got a PS/2 1430 * packet in the middle of ALPS packet. 1431 * 1432 * There is also possibility that we got 6-byte ALPS 1433 * packet followed by 3-byte packet from trackpoint. We 1434 * can not distinguish between these 2 scenarios but 1435 * because the latter is unlikely to happen in course of 1436 * normal operation (user would need to press all 1437 * buttons on the pad and start moving trackpoint 1438 * without touching the pad surface) we assume former. 1439 * Even if we are wrong the wost thing that would happen 1440 * the cursor would jump but we should not get protocol 1441 * de-synchronization. 1442 */ 1443 1444 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3], 1445 false); 1446 1447 /* 1448 * Continue with the standard ALPS protocol handling, 1449 * but make sure we won't process it as an interleaved 1450 * packet again, which may happen if all buttons are 1451 * pressed. To avoid this let's reset the 4th bit which 1452 * is normally 1. 1453 */ 1454 psmouse->packet[3] = psmouse->packet[6] & 0xf7; 1455 psmouse->pktcnt = 4; 1456 } 1457 1458 return PSMOUSE_GOOD_DATA; 1459 } 1460 1461 static void alps_flush_packet(unsigned long data) 1462 { 1463 struct psmouse *psmouse = (struct psmouse *)data; 1464 struct alps_data *priv = psmouse->private; 1465 1466 serio_pause_rx(psmouse->ps2dev.serio); 1467 1468 if (psmouse->pktcnt == psmouse->pktsize) { 1469 1470 /* 1471 * We did not any more data in reasonable amount of time. 1472 * Validate the last 3 bytes and process as a standard 1473 * ALPS packet. 1474 */ 1475 if ((psmouse->packet[3] | 1476 psmouse->packet[4] | 1477 psmouse->packet[5]) & 0x80) { 1478 psmouse_dbg(psmouse, 1479 "refusing packet %3ph (suspected interleaved ps/2)\n", 1480 psmouse->packet + 3); 1481 } else { 1482 priv->process_packet(psmouse); 1483 } 1484 psmouse->pktcnt = 0; 1485 } 1486 1487 serio_continue_rx(psmouse->ps2dev.serio); 1488 } 1489 1490 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse) 1491 { 1492 struct alps_data *priv = psmouse->private; 1493 1494 /* 1495 * Check if we are dealing with a bare PS/2 packet, presumably from 1496 * a device connected to the external PS/2 port. Because bare PS/2 1497 * protocol does not have enough constant bits to self-synchronize 1498 * properly we only do this if the device is fully synchronized. 1499 * Can not distinguish V8's first byte from PS/2 packet's 1500 */ 1501 if (priv->proto_version != ALPS_PROTO_V8 && 1502 !psmouse->out_of_sync_cnt && 1503 (psmouse->packet[0] & 0xc8) == 0x08) { 1504 1505 if (psmouse->pktcnt == 3) { 1506 alps_report_bare_ps2_packet(psmouse, psmouse->packet, 1507 true); 1508 return PSMOUSE_FULL_PACKET; 1509 } 1510 return PSMOUSE_GOOD_DATA; 1511 } 1512 1513 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */ 1514 1515 if ((priv->flags & ALPS_PS2_INTERLEAVED) && 1516 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) { 1517 return alps_handle_interleaved_ps2(psmouse); 1518 } 1519 1520 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) { 1521 psmouse_dbg(psmouse, 1522 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n", 1523 psmouse->packet[0], priv->mask0, priv->byte0); 1524 return PSMOUSE_BAD_DATA; 1525 } 1526 1527 /* Bytes 2 - pktsize should have 0 in the highest bit */ 1528 if (priv->proto_version < ALPS_PROTO_V5 && 1529 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize && 1530 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) { 1531 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1532 psmouse->pktcnt - 1, 1533 psmouse->packet[psmouse->pktcnt - 1]); 1534 1535 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE && 1536 psmouse->pktcnt == psmouse->pktsize) { 1537 /* 1538 * Some Dell boxes, such as Latitude E6440 or E7440 1539 * with closed lid, quite often smash last byte of 1540 * otherwise valid packet with 0xff. Given that the 1541 * next packet is very likely to be valid let's 1542 * report PSMOUSE_FULL_PACKET but not process data, 1543 * rather than reporting PSMOUSE_BAD_DATA and 1544 * filling the logs. 1545 */ 1546 return PSMOUSE_FULL_PACKET; 1547 } 1548 1549 return PSMOUSE_BAD_DATA; 1550 } 1551 1552 if ((priv->proto_version == ALPS_PROTO_V7 && 1553 !alps_is_valid_package_v7(psmouse)) || 1554 (priv->proto_version == ALPS_PROTO_V8 && 1555 !alps_is_valid_package_ss4_v2(psmouse))) { 1556 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1557 psmouse->pktcnt - 1, 1558 psmouse->packet[psmouse->pktcnt - 1]); 1559 return PSMOUSE_BAD_DATA; 1560 } 1561 1562 if (psmouse->pktcnt == psmouse->pktsize) { 1563 priv->process_packet(psmouse); 1564 return PSMOUSE_FULL_PACKET; 1565 } 1566 1567 return PSMOUSE_GOOD_DATA; 1568 } 1569 1570 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble) 1571 { 1572 struct ps2dev *ps2dev = &psmouse->ps2dev; 1573 struct alps_data *priv = psmouse->private; 1574 int command; 1575 unsigned char *param; 1576 unsigned char dummy[4]; 1577 1578 BUG_ON(nibble > 0xf); 1579 1580 command = priv->nibble_commands[nibble].command; 1581 param = (command & 0x0f00) ? 1582 dummy : (unsigned char *)&priv->nibble_commands[nibble].data; 1583 1584 if (ps2_command(ps2dev, param, command)) 1585 return -1; 1586 1587 return 0; 1588 } 1589 1590 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr) 1591 { 1592 struct ps2dev *ps2dev = &psmouse->ps2dev; 1593 struct alps_data *priv = psmouse->private; 1594 int i, nibble; 1595 1596 if (ps2_command(ps2dev, NULL, priv->addr_command)) 1597 return -1; 1598 1599 for (i = 12; i >= 0; i -= 4) { 1600 nibble = (addr >> i) & 0xf; 1601 if (alps_command_mode_send_nibble(psmouse, nibble)) 1602 return -1; 1603 } 1604 1605 return 0; 1606 } 1607 1608 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1609 { 1610 struct ps2dev *ps2dev = &psmouse->ps2dev; 1611 unsigned char param[4]; 1612 1613 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1614 return -1; 1615 1616 /* 1617 * The address being read is returned in the first two bytes 1618 * of the result. Check that this address matches the expected 1619 * address. 1620 */ 1621 if (addr != ((param[0] << 8) | param[1])) 1622 return -1; 1623 1624 return param[2]; 1625 } 1626 1627 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1628 { 1629 if (alps_command_mode_set_addr(psmouse, addr)) 1630 return -1; 1631 return __alps_command_mode_read_reg(psmouse, addr); 1632 } 1633 1634 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value) 1635 { 1636 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf)) 1637 return -1; 1638 if (alps_command_mode_send_nibble(psmouse, value & 0xf)) 1639 return -1; 1640 return 0; 1641 } 1642 1643 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr, 1644 u8 value) 1645 { 1646 if (alps_command_mode_set_addr(psmouse, addr)) 1647 return -1; 1648 return __alps_command_mode_write_reg(psmouse, value); 1649 } 1650 1651 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command, 1652 int repeated_command, unsigned char *param) 1653 { 1654 struct ps2dev *ps2dev = &psmouse->ps2dev; 1655 1656 param[0] = 0; 1657 if (init_command && ps2_command(ps2dev, param, init_command)) 1658 return -EIO; 1659 1660 if (ps2_command(ps2dev, NULL, repeated_command) || 1661 ps2_command(ps2dev, NULL, repeated_command) || 1662 ps2_command(ps2dev, NULL, repeated_command)) 1663 return -EIO; 1664 1665 param[0] = param[1] = param[2] = 0xff; 1666 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1667 return -EIO; 1668 1669 psmouse_dbg(psmouse, "%2.2X report: %3ph\n", 1670 repeated_command, param); 1671 return 0; 1672 } 1673 1674 static bool alps_check_valid_firmware_id(unsigned char id[]) 1675 { 1676 if (id[0] == 0x73) 1677 return true; 1678 1679 if (id[0] == 0x88 && 1680 (id[1] == 0x07 || 1681 id[1] == 0x08 || 1682 (id[1] & 0xf0) == 0xb0 || 1683 (id[1] & 0xf0) == 0xc0)) { 1684 return true; 1685 } 1686 1687 return false; 1688 } 1689 1690 static int alps_enter_command_mode(struct psmouse *psmouse) 1691 { 1692 unsigned char param[4]; 1693 1694 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) { 1695 psmouse_err(psmouse, "failed to enter command mode\n"); 1696 return -1; 1697 } 1698 1699 if (!alps_check_valid_firmware_id(param)) { 1700 psmouse_dbg(psmouse, 1701 "unknown response while entering command mode\n"); 1702 return -1; 1703 } 1704 return 0; 1705 } 1706 1707 static inline int alps_exit_command_mode(struct psmouse *psmouse) 1708 { 1709 struct ps2dev *ps2dev = &psmouse->ps2dev; 1710 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) 1711 return -1; 1712 return 0; 1713 } 1714 1715 /* 1716 * For DualPoint devices select the device that should respond to 1717 * subsequent commands. It looks like glidepad is behind stickpointer, 1718 * I'd thought it would be other way around... 1719 */ 1720 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable) 1721 { 1722 struct ps2dev *ps2dev = &psmouse->ps2dev; 1723 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11; 1724 1725 if (ps2_command(ps2dev, NULL, cmd) || 1726 ps2_command(ps2dev, NULL, cmd) || 1727 ps2_command(ps2dev, NULL, cmd) || 1728 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1729 return -1; 1730 1731 /* we may get 3 more bytes, just ignore them */ 1732 ps2_drain(ps2dev, 3, 100); 1733 1734 return 0; 1735 } 1736 1737 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse) 1738 { 1739 struct ps2dev *ps2dev = &psmouse->ps2dev; 1740 1741 /* Try ALPS magic knock - 4 disable before enable */ 1742 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1743 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1744 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1745 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1746 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1747 return -1; 1748 1749 /* 1750 * Switch mouse to poll (remote) mode so motion data will not 1751 * get in our way 1752 */ 1753 return ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETPOLL); 1754 } 1755 1756 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word) 1757 { 1758 int i, nibble; 1759 1760 /* 1761 * b0-b11 are valid bits, send sequence is inverse. 1762 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1 1763 */ 1764 for (i = 0; i <= 8; i += 4) { 1765 nibble = (word >> i) & 0xf; 1766 if (alps_command_mode_send_nibble(psmouse, nibble)) 1767 return -1; 1768 } 1769 1770 return 0; 1771 } 1772 1773 static int alps_monitor_mode_write_reg(struct psmouse *psmouse, 1774 u16 addr, u16 value) 1775 { 1776 struct ps2dev *ps2dev = &psmouse->ps2dev; 1777 1778 /* 0x0A0 is the command to write the word */ 1779 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) || 1780 alps_monitor_mode_send_word(psmouse, 0x0A0) || 1781 alps_monitor_mode_send_word(psmouse, addr) || 1782 alps_monitor_mode_send_word(psmouse, value) || 1783 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1784 return -1; 1785 1786 return 0; 1787 } 1788 1789 static int alps_monitor_mode(struct psmouse *psmouse, bool enable) 1790 { 1791 struct ps2dev *ps2dev = &psmouse->ps2dev; 1792 1793 if (enable) { 1794 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */ 1795 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 1796 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) || 1797 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1798 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1799 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1800 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1801 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1802 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO)) 1803 return -1; 1804 } else { 1805 /* EC to exit monitor mode */ 1806 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP)) 1807 return -1; 1808 } 1809 1810 return 0; 1811 } 1812 1813 static int alps_absolute_mode_v6(struct psmouse *psmouse) 1814 { 1815 u16 reg_val = 0x181; 1816 int ret = -1; 1817 1818 /* enter monitor mode, to write the register */ 1819 if (alps_monitor_mode(psmouse, true)) 1820 return -1; 1821 1822 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val); 1823 1824 if (alps_monitor_mode(psmouse, false)) 1825 ret = -1; 1826 1827 return ret; 1828 } 1829 1830 static int alps_get_status(struct psmouse *psmouse, char *param) 1831 { 1832 /* Get status: 0xF5 0xF5 0xF5 0xE9 */ 1833 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param)) 1834 return -1; 1835 1836 return 0; 1837 } 1838 1839 /* 1840 * Turn touchpad tapping on or off. The sequences are: 1841 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable, 1842 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable. 1843 * My guess that 0xE9 (GetInfo) is here as a sync point. 1844 * For models that also have stickpointer (DualPoints) its tapping 1845 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but 1846 * we don't fiddle with it. 1847 */ 1848 static int alps_tap_mode(struct psmouse *psmouse, int enable) 1849 { 1850 struct ps2dev *ps2dev = &psmouse->ps2dev; 1851 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES; 1852 unsigned char tap_arg = enable ? 0x0A : 0x00; 1853 unsigned char param[4]; 1854 1855 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) || 1856 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1857 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1858 ps2_command(ps2dev, &tap_arg, cmd)) 1859 return -1; 1860 1861 if (alps_get_status(psmouse, param)) 1862 return -1; 1863 1864 return 0; 1865 } 1866 1867 /* 1868 * alps_poll() - poll the touchpad for current motion packet. 1869 * Used in resync. 1870 */ 1871 static int alps_poll(struct psmouse *psmouse) 1872 { 1873 struct alps_data *priv = psmouse->private; 1874 unsigned char buf[sizeof(psmouse->packet)]; 1875 bool poll_failed; 1876 1877 if (priv->flags & ALPS_PASS) 1878 alps_passthrough_mode_v2(psmouse, true); 1879 1880 poll_failed = ps2_command(&psmouse->ps2dev, buf, 1881 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0; 1882 1883 if (priv->flags & ALPS_PASS) 1884 alps_passthrough_mode_v2(psmouse, false); 1885 1886 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0) 1887 return -1; 1888 1889 if ((psmouse->badbyte & 0xc8) == 0x08) { 1890 /* 1891 * Poll the track stick ... 1892 */ 1893 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8))) 1894 return -1; 1895 } 1896 1897 memcpy(psmouse->packet, buf, sizeof(buf)); 1898 return 0; 1899 } 1900 1901 static int alps_hw_init_v1_v2(struct psmouse *psmouse) 1902 { 1903 struct alps_data *priv = psmouse->private; 1904 1905 if ((priv->flags & ALPS_PASS) && 1906 alps_passthrough_mode_v2(psmouse, true)) { 1907 return -1; 1908 } 1909 1910 if (alps_tap_mode(psmouse, true)) { 1911 psmouse_warn(psmouse, "Failed to enable hardware tapping\n"); 1912 return -1; 1913 } 1914 1915 if (alps_absolute_mode_v1_v2(psmouse)) { 1916 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 1917 return -1; 1918 } 1919 1920 if ((priv->flags & ALPS_PASS) && 1921 alps_passthrough_mode_v2(psmouse, false)) { 1922 return -1; 1923 } 1924 1925 /* ALPS needs stream mode, otherwise it won't report any data */ 1926 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) { 1927 psmouse_err(psmouse, "Failed to enable stream mode\n"); 1928 return -1; 1929 } 1930 1931 return 0; 1932 } 1933 1934 static int alps_hw_init_v6(struct psmouse *psmouse) 1935 { 1936 unsigned char param[2] = {0xC8, 0x14}; 1937 1938 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */ 1939 if (alps_passthrough_mode_v2(psmouse, true)) 1940 return -1; 1941 1942 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1943 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1944 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1945 ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 1946 ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 1947 return -1; 1948 1949 if (alps_passthrough_mode_v2(psmouse, false)) 1950 return -1; 1951 1952 if (alps_absolute_mode_v6(psmouse)) { 1953 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 1954 return -1; 1955 } 1956 1957 return 0; 1958 } 1959 1960 /* 1961 * Enable or disable passthrough mode to the trackstick. 1962 */ 1963 static int alps_passthrough_mode_v3(struct psmouse *psmouse, 1964 int reg_base, bool enable) 1965 { 1966 int reg_val, ret = -1; 1967 1968 if (alps_enter_command_mode(psmouse)) 1969 return -1; 1970 1971 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008); 1972 if (reg_val == -1) 1973 goto error; 1974 1975 if (enable) 1976 reg_val |= 0x01; 1977 else 1978 reg_val &= ~0x01; 1979 1980 ret = __alps_command_mode_write_reg(psmouse, reg_val); 1981 1982 error: 1983 if (alps_exit_command_mode(psmouse)) 1984 ret = -1; 1985 return ret; 1986 } 1987 1988 /* Must be in command mode when calling this function */ 1989 static int alps_absolute_mode_v3(struct psmouse *psmouse) 1990 { 1991 int reg_val; 1992 1993 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 1994 if (reg_val == -1) 1995 return -1; 1996 1997 reg_val |= 0x06; 1998 if (__alps_command_mode_write_reg(psmouse, reg_val)) 1999 return -1; 2000 2001 return 0; 2002 } 2003 2004 static int alps_probe_trackstick_v3(struct psmouse *psmouse, int reg_base) 2005 { 2006 int ret = -EIO, reg_val; 2007 2008 if (alps_enter_command_mode(psmouse)) 2009 goto error; 2010 2011 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08); 2012 if (reg_val == -1) 2013 goto error; 2014 2015 /* bit 7: trackstick is present */ 2016 ret = reg_val & 0x80 ? 0 : -ENODEV; 2017 2018 error: 2019 alps_exit_command_mode(psmouse); 2020 return ret; 2021 } 2022 2023 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base) 2024 { 2025 struct ps2dev *ps2dev = &psmouse->ps2dev; 2026 int ret = 0; 2027 unsigned char param[4]; 2028 2029 if (alps_passthrough_mode_v3(psmouse, reg_base, true)) 2030 return -EIO; 2031 2032 /* 2033 * E7 report for the trackstick 2034 * 2035 * There have been reports of failures to seem to trace back 2036 * to the above trackstick check failing. When these occur 2037 * this E7 report fails, so when that happens we continue 2038 * with the assumption that there isn't a trackstick after 2039 * all. 2040 */ 2041 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) { 2042 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n"); 2043 ret = -ENODEV; 2044 } else { 2045 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param); 2046 2047 /* 2048 * Not sure what this does, but it is absolutely 2049 * essential. Without it, the touchpad does not 2050 * work at all and the trackstick just emits normal 2051 * PS/2 packets. 2052 */ 2053 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2054 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2055 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2056 alps_command_mode_send_nibble(psmouse, 0x9) || 2057 alps_command_mode_send_nibble(psmouse, 0x4)) { 2058 psmouse_err(psmouse, 2059 "Error sending magic E6 sequence\n"); 2060 ret = -EIO; 2061 goto error; 2062 } 2063 2064 /* 2065 * This ensures the trackstick packets are in the format 2066 * supported by this driver. If bit 1 isn't set the packet 2067 * format is different. 2068 */ 2069 if (alps_enter_command_mode(psmouse) || 2070 alps_command_mode_write_reg(psmouse, 2071 reg_base + 0x08, 0x82) || 2072 alps_exit_command_mode(psmouse)) 2073 ret = -EIO; 2074 } 2075 2076 error: 2077 if (alps_passthrough_mode_v3(psmouse, reg_base, false)) 2078 ret = -EIO; 2079 2080 return ret; 2081 } 2082 2083 static int alps_hw_init_v3(struct psmouse *psmouse) 2084 { 2085 struct ps2dev *ps2dev = &psmouse->ps2dev; 2086 int reg_val; 2087 unsigned char param[4]; 2088 2089 reg_val = alps_probe_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE); 2090 if (reg_val == -EIO) 2091 goto error; 2092 2093 if (reg_val == 0 && 2094 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO) 2095 goto error; 2096 2097 if (alps_enter_command_mode(psmouse) || 2098 alps_absolute_mode_v3(psmouse)) { 2099 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2100 goto error; 2101 } 2102 2103 reg_val = alps_command_mode_read_reg(psmouse, 0x0006); 2104 if (reg_val == -1) 2105 goto error; 2106 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2107 goto error; 2108 2109 reg_val = alps_command_mode_read_reg(psmouse, 0x0007); 2110 if (reg_val == -1) 2111 goto error; 2112 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2113 goto error; 2114 2115 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1) 2116 goto error; 2117 if (__alps_command_mode_write_reg(psmouse, 0x04)) 2118 goto error; 2119 2120 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1) 2121 goto error; 2122 if (__alps_command_mode_write_reg(psmouse, 0x03)) 2123 goto error; 2124 2125 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1) 2126 goto error; 2127 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03)) 2128 goto error; 2129 2130 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1) 2131 goto error; 2132 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04)) 2133 goto error; 2134 2135 alps_exit_command_mode(psmouse); 2136 2137 /* Set rate and enable data reporting */ 2138 param[0] = 0x64; 2139 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2140 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2141 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2142 return -1; 2143 } 2144 2145 return 0; 2146 2147 error: 2148 /* 2149 * Leaving the touchpad in command mode will essentially render 2150 * it unusable until the machine reboots, so exit it here just 2151 * to be safe 2152 */ 2153 alps_exit_command_mode(psmouse); 2154 return -1; 2155 } 2156 2157 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch) 2158 { 2159 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys; 2160 struct alps_data *priv = psmouse->private; 2161 2162 reg = alps_command_mode_read_reg(psmouse, reg_pitch); 2163 if (reg < 0) 2164 return reg; 2165 2166 x_pitch = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2167 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */ 2168 2169 y_pitch = (char)reg >> 4; /* sign extend upper 4 bits */ 2170 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */ 2171 2172 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1); 2173 if (reg < 0) 2174 return reg; 2175 2176 x_electrode = (char)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2177 x_electrode = 17 + x_electrode; 2178 2179 y_electrode = (char)reg >> 4; /* sign extend upper 4 bits */ 2180 y_electrode = 13 + y_electrode; 2181 2182 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */ 2183 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */ 2184 2185 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2186 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2187 2188 psmouse_dbg(psmouse, 2189 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n", 2190 x_pitch, y_pitch, x_electrode, y_electrode, 2191 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res); 2192 2193 return 0; 2194 } 2195 2196 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse) 2197 { 2198 struct alps_data *priv = psmouse->private; 2199 struct ps2dev *ps2dev = &psmouse->ps2dev; 2200 int reg_val, ret = -1; 2201 2202 if (priv->flags & ALPS_DUALPOINT) { 2203 reg_val = alps_setup_trackstick_v3(psmouse, 2204 ALPS_REG_BASE_RUSHMORE); 2205 if (reg_val == -EIO) 2206 goto error; 2207 } 2208 2209 if (alps_enter_command_mode(psmouse) || 2210 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 || 2211 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00)) 2212 goto error; 2213 2214 if (alps_get_v3_v7_resolution(psmouse, 0xc2da)) 2215 goto error; 2216 2217 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6); 2218 if (reg_val == -1) 2219 goto error; 2220 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd)) 2221 goto error; 2222 2223 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2224 goto error; 2225 2226 /* enter absolute mode */ 2227 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2228 if (reg_val == -1) 2229 goto error; 2230 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2231 goto error; 2232 2233 alps_exit_command_mode(psmouse); 2234 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2235 2236 error: 2237 alps_exit_command_mode(psmouse); 2238 return ret; 2239 } 2240 2241 /* Must be in command mode when calling this function */ 2242 static int alps_absolute_mode_v4(struct psmouse *psmouse) 2243 { 2244 int reg_val; 2245 2246 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 2247 if (reg_val == -1) 2248 return -1; 2249 2250 reg_val |= 0x02; 2251 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2252 return -1; 2253 2254 return 0; 2255 } 2256 2257 static int alps_hw_init_v4(struct psmouse *psmouse) 2258 { 2259 struct ps2dev *ps2dev = &psmouse->ps2dev; 2260 unsigned char param[4]; 2261 2262 if (alps_enter_command_mode(psmouse)) 2263 goto error; 2264 2265 if (alps_absolute_mode_v4(psmouse)) { 2266 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2267 goto error; 2268 } 2269 2270 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c)) 2271 goto error; 2272 2273 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03)) 2274 goto error; 2275 2276 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03)) 2277 goto error; 2278 2279 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15)) 2280 goto error; 2281 2282 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01)) 2283 goto error; 2284 2285 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03)) 2286 goto error; 2287 2288 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03)) 2289 goto error; 2290 2291 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03)) 2292 goto error; 2293 2294 alps_exit_command_mode(psmouse); 2295 2296 /* 2297 * This sequence changes the output from a 9-byte to an 2298 * 8-byte format. All the same data seems to be present, 2299 * just in a more compact format. 2300 */ 2301 param[0] = 0xc8; 2302 param[1] = 0x64; 2303 param[2] = 0x50; 2304 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2305 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) || 2306 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) || 2307 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 2308 return -1; 2309 2310 /* Set rate and enable data reporting */ 2311 param[0] = 0x64; 2312 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2313 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2314 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2315 return -1; 2316 } 2317 2318 return 0; 2319 2320 error: 2321 /* 2322 * Leaving the touchpad in command mode will essentially render 2323 * it unusable until the machine reboots, so exit it here just 2324 * to be safe 2325 */ 2326 alps_exit_command_mode(psmouse); 2327 return -1; 2328 } 2329 2330 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse, 2331 unsigned char index, unsigned char otp[]) 2332 { 2333 struct ps2dev *ps2dev = &psmouse->ps2dev; 2334 2335 switch (index) { 2336 case 0: 2337 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2338 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2339 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2340 return -1; 2341 2342 break; 2343 2344 case 1: 2345 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2346 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2347 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2348 return -1; 2349 2350 break; 2351 } 2352 2353 return 0; 2354 } 2355 2356 static int alps_update_device_area_ss4_v2(unsigned char otp[][4], 2357 struct alps_data *priv) 2358 { 2359 int num_x_electrode; 2360 int num_y_electrode; 2361 int x_pitch, y_pitch, x_phys, y_phys; 2362 2363 num_x_electrode = SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F); 2364 num_y_electrode = SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F); 2365 2366 priv->x_max = (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2367 priv->y_max = (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2368 2369 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM; 2370 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM; 2371 2372 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */ 2373 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */ 2374 2375 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2376 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2377 2378 return 0; 2379 } 2380 2381 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4], 2382 struct alps_data *priv) 2383 { 2384 unsigned char is_btnless; 2385 2386 is_btnless = (otp[1][1] >> 3) & 0x01; 2387 2388 if (is_btnless) 2389 priv->flags |= ALPS_BUTTONPAD; 2390 2391 return 0; 2392 } 2393 2394 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse, 2395 struct alps_data *priv) 2396 { 2397 unsigned char otp[2][4]; 2398 2399 memset(otp, 0, sizeof(otp)); 2400 2401 if (alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0]) || 2402 alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0])) 2403 return -1; 2404 2405 alps_update_device_area_ss4_v2(otp, priv); 2406 2407 alps_update_btn_info_ss4_v2(otp, priv); 2408 2409 return 0; 2410 } 2411 2412 static int alps_dolphin_get_device_area(struct psmouse *psmouse, 2413 struct alps_data *priv) 2414 { 2415 struct ps2dev *ps2dev = &psmouse->ps2dev; 2416 unsigned char param[4] = {0}; 2417 int num_x_electrode, num_y_electrode; 2418 2419 if (alps_enter_command_mode(psmouse)) 2420 return -1; 2421 2422 param[0] = 0x0a; 2423 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 2424 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2425 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2426 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2427 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE)) 2428 return -1; 2429 2430 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 2431 return -1; 2432 2433 /* 2434 * Dolphin's sensor line number is not fixed. It can be calculated 2435 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET. 2436 * Further more, we can get device's x_max and y_max by multiplying 2437 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE. 2438 * 2439 * e.g. When we get register's sensor_x = 11 & sensor_y = 8, 2440 * real sensor line number X = 11 + 8 = 19, and 2441 * real sensor line number Y = 8 + 1 = 9. 2442 * So, x_max = (19 - 1) * 64 = 1152, and 2443 * y_max = (9 - 1) * 64 = 512. 2444 */ 2445 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F); 2446 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F); 2447 priv->x_bits = num_x_electrode; 2448 priv->y_bits = num_y_electrode; 2449 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2450 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2451 2452 if (alps_exit_command_mode(psmouse)) 2453 return -1; 2454 2455 return 0; 2456 } 2457 2458 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse) 2459 { 2460 struct ps2dev *ps2dev = &psmouse->ps2dev; 2461 unsigned char param[2]; 2462 2463 /* This is dolphin "v1" as empirically defined by florin9doi */ 2464 param[0] = 0x64; 2465 param[1] = 0x28; 2466 2467 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2468 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2469 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 2470 return -1; 2471 2472 return 0; 2473 } 2474 2475 static int alps_hw_init_v7(struct psmouse *psmouse) 2476 { 2477 struct ps2dev *ps2dev = &psmouse->ps2dev; 2478 int reg_val, ret = -1; 2479 2480 if (alps_enter_command_mode(psmouse) || 2481 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1) 2482 goto error; 2483 2484 if (alps_get_v3_v7_resolution(psmouse, 0xc397)) 2485 goto error; 2486 2487 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2488 goto error; 2489 2490 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2491 if (reg_val == -1) 2492 goto error; 2493 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2494 goto error; 2495 2496 alps_exit_command_mode(psmouse); 2497 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2498 2499 error: 2500 alps_exit_command_mode(psmouse); 2501 return ret; 2502 } 2503 2504 static int alps_hw_init_ss4_v2(struct psmouse *psmouse) 2505 { 2506 struct ps2dev *ps2dev = &psmouse->ps2dev; 2507 char param[2] = {0x64, 0x28}; 2508 int ret = -1; 2509 2510 /* enter absolute mode */ 2511 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2512 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2513 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2514 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) { 2515 goto error; 2516 } 2517 2518 /* T.B.D. Decread noise packet number, delete in the future */ 2519 if (alps_exit_command_mode(psmouse) || 2520 alps_enter_command_mode(psmouse) || 2521 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) { 2522 goto error; 2523 } 2524 alps_exit_command_mode(psmouse); 2525 2526 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2527 2528 error: 2529 alps_exit_command_mode(psmouse); 2530 return ret; 2531 } 2532 2533 static int alps_set_protocol(struct psmouse *psmouse, 2534 struct alps_data *priv, 2535 const struct alps_protocol_info *protocol) 2536 { 2537 psmouse->private = priv; 2538 2539 setup_timer(&priv->timer, alps_flush_packet, (unsigned long)psmouse); 2540 2541 priv->proto_version = protocol->version; 2542 priv->byte0 = protocol->byte0; 2543 priv->mask0 = protocol->mask0; 2544 priv->flags = protocol->flags; 2545 2546 priv->x_max = 2000; 2547 priv->y_max = 1400; 2548 priv->x_bits = 15; 2549 priv->y_bits = 11; 2550 2551 switch (priv->proto_version) { 2552 case ALPS_PROTO_V1: 2553 case ALPS_PROTO_V2: 2554 priv->hw_init = alps_hw_init_v1_v2; 2555 priv->process_packet = alps_process_packet_v1_v2; 2556 priv->set_abs_params = alps_set_abs_params_st; 2557 priv->x_max = 1023; 2558 priv->y_max = 767; 2559 break; 2560 2561 case ALPS_PROTO_V3: 2562 priv->hw_init = alps_hw_init_v3; 2563 priv->process_packet = alps_process_packet_v3; 2564 priv->set_abs_params = alps_set_abs_params_mt; 2565 priv->decode_fields = alps_decode_pinnacle; 2566 priv->nibble_commands = alps_v3_nibble_commands; 2567 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2568 break; 2569 2570 case ALPS_PROTO_V3_RUSHMORE: 2571 priv->hw_init = alps_hw_init_rushmore_v3; 2572 priv->process_packet = alps_process_packet_v3; 2573 priv->set_abs_params = alps_set_abs_params_mt; 2574 priv->decode_fields = alps_decode_rushmore; 2575 priv->nibble_commands = alps_v3_nibble_commands; 2576 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2577 priv->x_bits = 16; 2578 priv->y_bits = 12; 2579 2580 if (alps_probe_trackstick_v3(psmouse, 2581 ALPS_REG_BASE_RUSHMORE) < 0) 2582 priv->flags &= ~ALPS_DUALPOINT; 2583 2584 break; 2585 2586 case ALPS_PROTO_V4: 2587 priv->hw_init = alps_hw_init_v4; 2588 priv->process_packet = alps_process_packet_v4; 2589 priv->set_abs_params = alps_set_abs_params_mt; 2590 priv->nibble_commands = alps_v4_nibble_commands; 2591 priv->addr_command = PSMOUSE_CMD_DISABLE; 2592 break; 2593 2594 case ALPS_PROTO_V5: 2595 priv->hw_init = alps_hw_init_dolphin_v1; 2596 priv->process_packet = alps_process_touchpad_packet_v3_v5; 2597 priv->decode_fields = alps_decode_dolphin; 2598 priv->set_abs_params = alps_set_abs_params_mt; 2599 priv->nibble_commands = alps_v3_nibble_commands; 2600 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2601 priv->x_bits = 23; 2602 priv->y_bits = 12; 2603 2604 if (alps_dolphin_get_device_area(psmouse, priv)) 2605 return -EIO; 2606 2607 break; 2608 2609 case ALPS_PROTO_V6: 2610 priv->hw_init = alps_hw_init_v6; 2611 priv->process_packet = alps_process_packet_v6; 2612 priv->set_abs_params = alps_set_abs_params_st; 2613 priv->nibble_commands = alps_v6_nibble_commands; 2614 priv->x_max = 2047; 2615 priv->y_max = 1535; 2616 break; 2617 2618 case ALPS_PROTO_V7: 2619 priv->hw_init = alps_hw_init_v7; 2620 priv->process_packet = alps_process_packet_v7; 2621 priv->decode_fields = alps_decode_packet_v7; 2622 priv->set_abs_params = alps_set_abs_params_v7; 2623 priv->nibble_commands = alps_v3_nibble_commands; 2624 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2625 priv->x_max = 0xfff; 2626 priv->y_max = 0x7ff; 2627 2628 if (priv->fw_ver[1] != 0xba) 2629 priv->flags |= ALPS_BUTTONPAD; 2630 2631 break; 2632 2633 case ALPS_PROTO_V8: 2634 priv->hw_init = alps_hw_init_ss4_v2; 2635 priv->process_packet = alps_process_packet_ss4_v2; 2636 priv->decode_fields = alps_decode_ss4_v2; 2637 priv->set_abs_params = alps_set_abs_params_ss4_v2; 2638 priv->nibble_commands = alps_v3_nibble_commands; 2639 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2640 2641 if (alps_set_defaults_ss4_v2(psmouse, priv)) 2642 return -EIO; 2643 2644 break; 2645 } 2646 2647 return 0; 2648 } 2649 2650 static const struct alps_protocol_info *alps_match_table(unsigned char *e7, 2651 unsigned char *ec) 2652 { 2653 const struct alps_model_info *model; 2654 int i; 2655 2656 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) { 2657 model = &alps_model_data[i]; 2658 2659 if (!memcmp(e7, model->signature, sizeof(model->signature)) && 2660 (!model->command_mode_resp || 2661 model->command_mode_resp == ec[2])) { 2662 2663 return &model->protocol_info; 2664 } 2665 } 2666 2667 return NULL; 2668 } 2669 2670 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv) 2671 { 2672 const struct alps_protocol_info *protocol; 2673 unsigned char e6[4], e7[4], ec[4]; 2674 int error; 2675 2676 /* 2677 * First try "E6 report". 2678 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed. 2679 * The bits 0-2 of the first byte will be 1s if some buttons are 2680 * pressed. 2681 */ 2682 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2683 PSMOUSE_CMD_SETSCALE11, e6)) 2684 return -EIO; 2685 2686 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100)) 2687 return -EINVAL; 2688 2689 /* 2690 * Now get the "E7" and "EC" reports. These will uniquely identify 2691 * most ALPS touchpads. 2692 */ 2693 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2694 PSMOUSE_CMD_SETSCALE21, e7) || 2695 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2696 PSMOUSE_CMD_RESET_WRAP, ec) || 2697 alps_exit_command_mode(psmouse)) 2698 return -EIO; 2699 2700 protocol = alps_match_table(e7, ec); 2701 if (!protocol) { 2702 if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 && 2703 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) { 2704 protocol = &alps_v5_protocol_data; 2705 } else if (ec[0] == 0x88 && 2706 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) { 2707 protocol = &alps_v7_protocol_data; 2708 } else if (ec[0] == 0x88 && ec[1] == 0x08) { 2709 protocol = &alps_v3_rushmore_data; 2710 } else if (ec[0] == 0x88 && ec[1] == 0x07 && 2711 ec[2] >= 0x90 && ec[2] <= 0x9d) { 2712 protocol = &alps_v3_protocol_data; 2713 } else if (e7[0] == 0x73 && e7[1] == 0x03 && 2714 e7[2] == 0x14 && ec[1] == 0x02) { 2715 protocol = &alps_v8_protocol_data; 2716 } else { 2717 psmouse_dbg(psmouse, 2718 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec); 2719 return -EINVAL; 2720 } 2721 } 2722 2723 if (priv) { 2724 /* Save the Firmware version */ 2725 memcpy(priv->fw_ver, ec, 3); 2726 error = alps_set_protocol(psmouse, priv, protocol); 2727 if (error) 2728 return error; 2729 } 2730 2731 return 0; 2732 } 2733 2734 static int alps_reconnect(struct psmouse *psmouse) 2735 { 2736 struct alps_data *priv = psmouse->private; 2737 2738 psmouse_reset(psmouse); 2739 2740 if (alps_identify(psmouse, priv) < 0) 2741 return -1; 2742 2743 return priv->hw_init(psmouse); 2744 } 2745 2746 static void alps_disconnect(struct psmouse *psmouse) 2747 { 2748 struct alps_data *priv = psmouse->private; 2749 2750 psmouse_reset(psmouse); 2751 del_timer_sync(&priv->timer); 2752 if (priv->dev2) 2753 input_unregister_device(priv->dev2); 2754 if (!IS_ERR_OR_NULL(priv->dev3)) 2755 input_unregister_device(priv->dev3); 2756 kfree(priv); 2757 } 2758 2759 static void alps_set_abs_params_st(struct alps_data *priv, 2760 struct input_dev *dev1) 2761 { 2762 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0); 2763 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0); 2764 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2765 } 2766 2767 static void alps_set_abs_params_mt_common(struct alps_data *priv, 2768 struct input_dev *dev1) 2769 { 2770 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); 2771 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); 2772 2773 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res); 2774 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res); 2775 2776 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit); 2777 set_bit(BTN_TOOL_QUADTAP, dev1->keybit); 2778 } 2779 2780 static void alps_set_abs_params_mt(struct alps_data *priv, 2781 struct input_dev *dev1) 2782 { 2783 alps_set_abs_params_mt_common(priv, dev1); 2784 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2785 2786 input_mt_init_slots(dev1, MAX_TOUCHES, 2787 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2788 INPUT_MT_TRACK | INPUT_MT_SEMI_MT); 2789 } 2790 2791 static void alps_set_abs_params_v7(struct alps_data *priv, 2792 struct input_dev *dev1) 2793 { 2794 alps_set_abs_params_mt_common(priv, dev1); 2795 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2796 2797 input_mt_init_slots(dev1, MAX_TOUCHES, 2798 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2799 INPUT_MT_TRACK); 2800 2801 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2802 } 2803 2804 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 2805 struct input_dev *dev1) 2806 { 2807 alps_set_abs_params_mt_common(priv, dev1); 2808 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2809 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 2810 2811 input_mt_init_slots(dev1, MAX_TOUCHES, 2812 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 2813 INPUT_MT_TRACK); 2814 } 2815 2816 int alps_init(struct psmouse *psmouse) 2817 { 2818 struct alps_data *priv = psmouse->private; 2819 struct input_dev *dev1 = psmouse->dev; 2820 int error; 2821 2822 error = priv->hw_init(psmouse); 2823 if (error) 2824 goto init_fail; 2825 2826 /* 2827 * Undo part of setup done for us by psmouse core since touchpad 2828 * is not a relative device. 2829 */ 2830 __clear_bit(EV_REL, dev1->evbit); 2831 __clear_bit(REL_X, dev1->relbit); 2832 __clear_bit(REL_Y, dev1->relbit); 2833 2834 /* 2835 * Now set up our capabilities. 2836 */ 2837 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY); 2838 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH); 2839 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER); 2840 dev1->keybit[BIT_WORD(BTN_LEFT)] |= 2841 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 2842 2843 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS); 2844 2845 priv->set_abs_params(priv, dev1); 2846 2847 if (priv->flags & ALPS_WHEEL) { 2848 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL); 2849 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL); 2850 } 2851 2852 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 2853 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD); 2854 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK); 2855 } 2856 2857 if (priv->flags & ALPS_FOUR_BUTTONS) { 2858 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0); 2859 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1); 2860 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2); 2861 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3); 2862 } else if (priv->flags & ALPS_BUTTONPAD) { 2863 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit); 2864 clear_bit(BTN_RIGHT, dev1->keybit); 2865 } else { 2866 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE); 2867 } 2868 2869 if (priv->flags & ALPS_DUALPOINT) { 2870 struct input_dev *dev2; 2871 2872 dev2 = input_allocate_device(); 2873 if (!dev2) { 2874 psmouse_err(psmouse, 2875 "failed to allocate trackstick device\n"); 2876 error = -ENOMEM; 2877 goto init_fail; 2878 } 2879 2880 snprintf(priv->phys2, sizeof(priv->phys2), "%s/input1", 2881 psmouse->ps2dev.serio->phys); 2882 dev2->phys = priv->phys2; 2883 2884 /* 2885 * format of input device name is: "protocol vendor name" 2886 * see function psmouse_switch_protocol() in psmouse-base.c 2887 */ 2888 dev2->name = "AlpsPS/2 ALPS DualPoint Stick"; 2889 2890 dev2->id.bustype = BUS_I8042; 2891 dev2->id.vendor = 0x0002; 2892 dev2->id.product = PSMOUSE_ALPS; 2893 dev2->id.version = priv->proto_version; 2894 dev2->dev.parent = &psmouse->ps2dev.serio->dev; 2895 2896 input_set_capability(dev2, EV_REL, REL_X); 2897 input_set_capability(dev2, EV_REL, REL_Y); 2898 input_set_capability(dev2, EV_KEY, BTN_LEFT); 2899 input_set_capability(dev2, EV_KEY, BTN_RIGHT); 2900 input_set_capability(dev2, EV_KEY, BTN_MIDDLE); 2901 2902 __set_bit(INPUT_PROP_POINTER, dev2->propbit); 2903 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit); 2904 2905 error = input_register_device(dev2); 2906 if (error) { 2907 psmouse_err(psmouse, 2908 "failed to register trackstick device: %d\n", 2909 error); 2910 input_free_device(dev2); 2911 goto init_fail; 2912 } 2913 2914 priv->dev2 = dev2; 2915 } 2916 2917 priv->psmouse = psmouse; 2918 2919 INIT_DELAYED_WORK(&priv->dev3_register_work, 2920 alps_register_bare_ps2_mouse); 2921 2922 psmouse->protocol_handler = alps_process_byte; 2923 psmouse->poll = alps_poll; 2924 psmouse->disconnect = alps_disconnect; 2925 psmouse->reconnect = alps_reconnect; 2926 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6; 2927 2928 /* We are having trouble resyncing ALPS touchpads so disable it for now */ 2929 psmouse->resync_time = 0; 2930 2931 /* Allow 2 invalid packets without resetting device */ 2932 psmouse->resetafter = psmouse->pktsize * 2; 2933 2934 return 0; 2935 2936 init_fail: 2937 psmouse_reset(psmouse); 2938 /* 2939 * Even though we did not allocate psmouse->private we do free 2940 * it here. 2941 */ 2942 kfree(psmouse->private); 2943 psmouse->private = NULL; 2944 return error; 2945 } 2946 2947 int alps_detect(struct psmouse *psmouse, bool set_properties) 2948 { 2949 struct alps_data *priv; 2950 int error; 2951 2952 error = alps_identify(psmouse, NULL); 2953 if (error) 2954 return error; 2955 2956 /* 2957 * Reset the device to make sure it is fully operational: 2958 * on some laptops, like certain Dell Latitudes, we may 2959 * fail to properly detect presence of trackstick if device 2960 * has not been reset. 2961 */ 2962 psmouse_reset(psmouse); 2963 2964 priv = kzalloc(sizeof(struct alps_data), GFP_KERNEL); 2965 if (!priv) 2966 return -ENOMEM; 2967 2968 error = alps_identify(psmouse, priv); 2969 if (error) { 2970 kfree(priv); 2971 return error; 2972 } 2973 2974 if (set_properties) { 2975 psmouse->vendor = "ALPS"; 2976 psmouse->name = priv->flags & ALPS_DUALPOINT ? 2977 "DualPoint TouchPad" : "GlidePoint"; 2978 psmouse->model = priv->proto_version; 2979 } else { 2980 /* 2981 * Destroy alps_data structure we allocated earlier since 2982 * this was just a "trial run". Otherwise we'll keep it 2983 * to be used by alps_init() which has to be called if 2984 * we succeed and set_properties is true. 2985 */ 2986 kfree(priv); 2987 psmouse->private = NULL; 2988 } 2989 2990 return 0; 2991 } 2992 2993