1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * ALPS touchpad PS/2 mouse driver 4 * 5 * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au> 6 * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com> 7 * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru> 8 * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> 9 * Copyright (c) 2009 Sebastian Kapfer <sebastian_kapfer@gmx.net> 10 * 11 * ALPS detection, tap switching and status querying info is taken from 12 * tpconfig utility (by C. Scott Ananian and Bruce Kall). 13 */ 14 15 #include "linux/workqueue.h" 16 #include <linux/slab.h> 17 #include <linux/input.h> 18 #include <linux/input/mt.h> 19 #include <linux/serio.h> 20 #include <linux/libps2.h> 21 #include <linux/dmi.h> 22 23 #include "psmouse.h" 24 #include "alps.h" 25 #include "trackpoint.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_V7 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_STICK_BITS 0x100 /* separate stick button bits */ 104 #define ALPS_BUTTONPAD 0x200 /* device is a clickpad */ 105 #define ALPS_DUALPOINT_WITH_PRESSURE 0x400 /* device can report trackpoint pressure */ 106 107 static const struct alps_model_info alps_model_data[] = { 108 /* 109 * XXX This entry is suspicious. First byte has zero lower nibble, 110 * which is what a normal mouse would report. Also, the value 0x0e 111 * isn't valid per PS/2 spec. 112 */ 113 { { 0x20, 0x02, 0x0e }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 114 115 { { 0x22, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, 116 { { 0x22, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D600 */ 117 { { 0x32, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Toshiba Salellite Pro M10 */ 118 { { 0x33, 0x02, 0x0a }, { ALPS_PROTO_V1, 0x88, 0xf8, 0 } }, /* UMAX-530T */ 119 { { 0x52, 0x01, 0x14 }, { ALPS_PROTO_V2, 0xff, 0xff, 120 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Toshiba Tecra A11-11L */ 121 { { 0x53, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 122 { { 0x53, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 123 { { 0x60, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, /* HP ze1115 */ 124 { { 0x62, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xcf, 0xcf, 125 ALPS_PASS | ALPS_DUALPOINT | ALPS_PS2_INTERLEAVED } }, /* Dell Latitude E5500, E6400, E6500, Precision M4400 */ 126 { { 0x63, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 127 { { 0x63, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 128 { { 0x63, 0x02, 0x28 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Fujitsu Siemens S6010 */ 129 { { 0x63, 0x02, 0x3c }, { ALPS_PROTO_V2, 0x8f, 0x8f, ALPS_WHEEL } }, /* Toshiba Satellite S2400-103 */ 130 { { 0x63, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xef, 0xef, ALPS_FW_BK_1 } }, /* NEC Versa L320 */ 131 { { 0x63, 0x02, 0x64 }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 132 { { 0x63, 0x03, 0xc8 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_PASS | ALPS_DUALPOINT } }, /* Dell Latitude D800 */ 133 { { 0x73, 0x00, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_DUALPOINT } }, /* ThinkPad R61 8918-5QG */ 134 { { 0x73, 0x00, 0x14 }, { ALPS_PROTO_V6, 0xff, 0xff, ALPS_DUALPOINT } }, /* Dell XT2 */ 135 { { 0x73, 0x02, 0x0a }, { ALPS_PROTO_V2, 0xf8, 0xf8, 0 } }, 136 { { 0x73, 0x02, 0x14 }, { ALPS_PROTO_V2, 0xf8, 0xf8, ALPS_FW_BK_2 } }, /* Ahtec Laptop */ 137 { { 0x73, 0x02, 0x50 }, { ALPS_PROTO_V2, 0xcf, 0xcf, ALPS_FOUR_BUTTONS } }, /* Dell Vostro 1400 */ 138 }; 139 140 static const struct alps_protocol_info alps_v3_protocol_data = { 141 ALPS_PROTO_V3, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE 142 }; 143 144 static const struct alps_protocol_info alps_v3_rushmore_data = { 145 ALPS_PROTO_V3_RUSHMORE, 0x8f, 0x8f, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE 146 }; 147 148 static const struct alps_protocol_info alps_v4_protocol_data = { 149 ALPS_PROTO_V4, 0x8f, 0x8f, 0 150 }; 151 152 static const struct alps_protocol_info alps_v5_protocol_data = { 153 ALPS_PROTO_V5, 0xc8, 0xd8, 0 154 }; 155 156 static const struct alps_protocol_info alps_v7_protocol_data = { 157 ALPS_PROTO_V7, 0x48, 0x48, ALPS_DUALPOINT | ALPS_DUALPOINT_WITH_PRESSURE 158 }; 159 160 static const struct alps_protocol_info alps_v8_protocol_data = { 161 ALPS_PROTO_V8, 0x18, 0x18, 0 162 }; 163 164 static const struct alps_protocol_info alps_v9_protocol_data = { 165 ALPS_PROTO_V9, 0xc8, 0xc8, 0 166 }; 167 168 /* 169 * Some v2 models report the stick buttons in separate bits 170 */ 171 static const struct dmi_system_id alps_dmi_has_separate_stick_buttons[] = { 172 #if defined(CONFIG_DMI) && defined(CONFIG_X86) 173 { 174 /* Extrapolated from other entries */ 175 .matches = { 176 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 177 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D420"), 178 }, 179 }, 180 { 181 /* Reported-by: Hans de Bruin <jmdebruin@xmsnet.nl> */ 182 .matches = { 183 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 184 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D430"), 185 }, 186 }, 187 { 188 /* Reported-by: Hans de Goede <hdegoede@redhat.com> */ 189 .matches = { 190 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 191 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D620"), 192 }, 193 }, 194 { 195 /* Extrapolated from other entries */ 196 .matches = { 197 DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), 198 DMI_MATCH(DMI_PRODUCT_NAME, "Latitude D630"), 199 }, 200 }, 201 #endif 202 { } 203 }; 204 205 static void alps_set_abs_params_st(struct alps_data *priv, 206 struct input_dev *dev1); 207 static void alps_set_abs_params_semi_mt(struct alps_data *priv, 208 struct input_dev *dev1); 209 static void alps_set_abs_params_v7(struct alps_data *priv, 210 struct input_dev *dev1); 211 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 212 struct input_dev *dev1); 213 214 /* Packet formats are described in Documentation/input/devices/alps.rst */ 215 216 static bool alps_is_valid_first_byte(struct alps_data *priv, 217 unsigned char data) 218 { 219 return (data & priv->mask0) == priv->byte0; 220 } 221 222 static void alps_report_buttons(struct input_dev *dev1, struct input_dev *dev2, 223 int left, int right, int middle) 224 { 225 struct input_dev *dev; 226 227 /* 228 * If shared button has already been reported on the 229 * other device (dev2) then this event should be also 230 * sent through that device. 231 */ 232 dev = (dev2 && test_bit(BTN_LEFT, dev2->key)) ? dev2 : dev1; 233 input_report_key(dev, BTN_LEFT, left); 234 235 dev = (dev2 && test_bit(BTN_RIGHT, dev2->key)) ? dev2 : dev1; 236 input_report_key(dev, BTN_RIGHT, right); 237 238 dev = (dev2 && test_bit(BTN_MIDDLE, dev2->key)) ? dev2 : dev1; 239 input_report_key(dev, BTN_MIDDLE, middle); 240 241 /* 242 * Sync the _other_ device now, we'll do the first 243 * device later once we report the rest of the events. 244 */ 245 if (dev2) 246 input_sync(dev2); 247 } 248 249 static void alps_process_packet_v1_v2(struct psmouse *psmouse) 250 { 251 struct alps_data *priv = psmouse->private; 252 unsigned char *packet = psmouse->packet; 253 struct input_dev *dev = psmouse->dev; 254 struct input_dev *dev2 = priv->dev2; 255 int x, y, z, ges, fin, left, right, middle; 256 int back = 0, forward = 0; 257 258 if (priv->proto_version == ALPS_PROTO_V1) { 259 left = packet[2] & 0x10; 260 right = packet[2] & 0x08; 261 middle = 0; 262 x = packet[1] | ((packet[0] & 0x07) << 7); 263 y = packet[4] | ((packet[3] & 0x07) << 7); 264 z = packet[5]; 265 } else { 266 left = packet[3] & 1; 267 right = packet[3] & 2; 268 middle = packet[3] & 4; 269 x = packet[1] | ((packet[2] & 0x78) << (7 - 3)); 270 y = packet[4] | ((packet[3] & 0x70) << (7 - 4)); 271 z = packet[5]; 272 } 273 274 if (priv->flags & ALPS_FW_BK_1) { 275 back = packet[0] & 0x10; 276 forward = packet[2] & 4; 277 } 278 279 if (priv->flags & ALPS_FW_BK_2) { 280 back = packet[3] & 4; 281 forward = packet[2] & 4; 282 if ((middle = forward && back)) 283 forward = back = 0; 284 } 285 286 ges = packet[2] & 1; 287 fin = packet[2] & 2; 288 289 if ((priv->flags & ALPS_DUALPOINT) && z == 127) { 290 input_report_rel(dev2, REL_X, (x > 383 ? (x - 768) : x)); 291 input_report_rel(dev2, REL_Y, -(y > 255 ? (y - 512) : y)); 292 293 alps_report_buttons(dev2, dev, left, right, middle); 294 295 input_sync(dev2); 296 return; 297 } 298 299 /* Some models have separate stick button bits */ 300 if (priv->flags & ALPS_STICK_BITS) { 301 left |= packet[0] & 1; 302 right |= packet[0] & 2; 303 middle |= packet[0] & 4; 304 } 305 306 alps_report_buttons(dev, dev2, left, right, middle); 307 308 /* Convert hardware tap to a reasonable Z value */ 309 if (ges && !fin) 310 z = 40; 311 312 /* 313 * A "tap and drag" operation is reported by the hardware as a transition 314 * from (!fin && ges) to (fin && ges). This should be translated to the 315 * sequence Z>0, Z==0, Z>0, so the Z==0 event has to be generated manually. 316 */ 317 if (ges && fin && !priv->prev_fin) { 318 input_report_abs(dev, ABS_X, x); 319 input_report_abs(dev, ABS_Y, y); 320 input_report_abs(dev, ABS_PRESSURE, 0); 321 input_report_key(dev, BTN_TOOL_FINGER, 0); 322 input_sync(dev); 323 } 324 priv->prev_fin = fin; 325 326 if (z > 30) 327 input_report_key(dev, BTN_TOUCH, 1); 328 if (z < 25) 329 input_report_key(dev, BTN_TOUCH, 0); 330 331 if (z > 0) { 332 input_report_abs(dev, ABS_X, x); 333 input_report_abs(dev, ABS_Y, y); 334 } 335 336 input_report_abs(dev, ABS_PRESSURE, z); 337 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 338 339 if (priv->flags & ALPS_WHEEL) 340 input_report_rel(dev, REL_WHEEL, ((packet[2] << 1) & 0x08) - ((packet[0] >> 4) & 0x07)); 341 342 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 343 input_report_key(dev, BTN_FORWARD, forward); 344 input_report_key(dev, BTN_BACK, back); 345 } 346 347 if (priv->flags & ALPS_FOUR_BUTTONS) { 348 input_report_key(dev, BTN_0, packet[2] & 4); 349 input_report_key(dev, BTN_1, packet[0] & 0x10); 350 input_report_key(dev, BTN_2, packet[3] & 4); 351 input_report_key(dev, BTN_3, packet[0] & 0x20); 352 } 353 354 input_sync(dev); 355 } 356 357 static void alps_get_bitmap_points(unsigned int map, 358 struct alps_bitmap_point *low, 359 struct alps_bitmap_point *high, 360 int *fingers) 361 { 362 struct alps_bitmap_point *point; 363 int i, bit, prev_bit = 0; 364 365 point = low; 366 for (i = 0; map != 0; i++, map >>= 1) { 367 bit = map & 1; 368 if (bit) { 369 if (!prev_bit) { 370 point->start_bit = i; 371 point->num_bits = 0; 372 (*fingers)++; 373 } 374 point->num_bits++; 375 } else { 376 if (prev_bit) 377 point = high; 378 } 379 prev_bit = bit; 380 } 381 } 382 383 /* 384 * Process bitmap data from semi-mt protocols. Returns the number of 385 * fingers detected. A return value of 0 means at least one of the 386 * bitmaps was empty. 387 * 388 * The bitmaps don't have enough data to track fingers, so this function 389 * only generates points representing a bounding box of all contacts. 390 * These points are returned in fields->mt when the return value 391 * is greater than 0. 392 */ 393 static int alps_process_bitmap(struct alps_data *priv, 394 struct alps_fields *fields) 395 { 396 int i, fingers_x = 0, fingers_y = 0, fingers, closest; 397 struct alps_bitmap_point x_low = {0,}, x_high = {0,}; 398 struct alps_bitmap_point y_low = {0,}, y_high = {0,}; 399 struct input_mt_pos corner[4]; 400 401 if (!fields->x_map || !fields->y_map) 402 return 0; 403 404 alps_get_bitmap_points(fields->x_map, &x_low, &x_high, &fingers_x); 405 alps_get_bitmap_points(fields->y_map, &y_low, &y_high, &fingers_y); 406 407 /* 408 * Fingers can overlap, so we use the maximum count of fingers 409 * on either axis as the finger count. 410 */ 411 fingers = max(fingers_x, fingers_y); 412 413 /* 414 * If an axis reports only a single contact, we have overlapping or 415 * adjacent fingers. Divide the single contact between the two points. 416 */ 417 if (fingers_x == 1) { 418 i = (x_low.num_bits - 1) / 2; 419 x_low.num_bits = x_low.num_bits - i; 420 x_high.start_bit = x_low.start_bit + i; 421 x_high.num_bits = max(i, 1); 422 } 423 if (fingers_y == 1) { 424 i = (y_low.num_bits - 1) / 2; 425 y_low.num_bits = y_low.num_bits - i; 426 y_high.start_bit = y_low.start_bit + i; 427 y_high.num_bits = max(i, 1); 428 } 429 430 /* top-left corner */ 431 corner[0].x = 432 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) / 433 (2 * (priv->x_bits - 1)); 434 corner[0].y = 435 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) / 436 (2 * (priv->y_bits - 1)); 437 438 /* top-right corner */ 439 corner[1].x = 440 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) / 441 (2 * (priv->x_bits - 1)); 442 corner[1].y = 443 (priv->y_max * (2 * y_low.start_bit + y_low.num_bits - 1)) / 444 (2 * (priv->y_bits - 1)); 445 446 /* bottom-right corner */ 447 corner[2].x = 448 (priv->x_max * (2 * x_high.start_bit + x_high.num_bits - 1)) / 449 (2 * (priv->x_bits - 1)); 450 corner[2].y = 451 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) / 452 (2 * (priv->y_bits - 1)); 453 454 /* bottom-left corner */ 455 corner[3].x = 456 (priv->x_max * (2 * x_low.start_bit + x_low.num_bits - 1)) / 457 (2 * (priv->x_bits - 1)); 458 corner[3].y = 459 (priv->y_max * (2 * y_high.start_bit + y_high.num_bits - 1)) / 460 (2 * (priv->y_bits - 1)); 461 462 /* x-bitmap order is reversed on v5 touchpads */ 463 if (priv->proto_version == ALPS_PROTO_V5) { 464 for (i = 0; i < 4; i++) 465 corner[i].x = priv->x_max - corner[i].x; 466 } 467 468 /* y-bitmap order is reversed on v3 and v4 touchpads */ 469 if (priv->proto_version == ALPS_PROTO_V3 || 470 priv->proto_version == ALPS_PROTO_V4) { 471 for (i = 0; i < 4; i++) 472 corner[i].y = priv->y_max - corner[i].y; 473 } 474 475 /* 476 * We only select a corner for the second touch once per 2 finger 477 * touch sequence to avoid the chosen corner (and thus the coordinates) 478 * jumping around when the first touch is in the middle. 479 */ 480 if (priv->second_touch == -1) { 481 /* Find corner closest to our st coordinates */ 482 closest = 0x7fffffff; 483 for (i = 0; i < 4; i++) { 484 int dx = fields->st.x - corner[i].x; 485 int dy = fields->st.y - corner[i].y; 486 int distance = dx * dx + dy * dy; 487 488 if (distance < closest) { 489 priv->second_touch = i; 490 closest = distance; 491 } 492 } 493 /* And select the opposite corner to use for the 2nd touch */ 494 priv->second_touch = (priv->second_touch + 2) % 4; 495 } 496 497 fields->mt[0] = fields->st; 498 fields->mt[1] = corner[priv->second_touch]; 499 500 return fingers; 501 } 502 503 static void alps_set_slot(struct input_dev *dev, int slot, int x, int y) 504 { 505 input_mt_slot(dev, slot); 506 input_mt_report_slot_state(dev, MT_TOOL_FINGER, true); 507 input_report_abs(dev, ABS_MT_POSITION_X, x); 508 input_report_abs(dev, ABS_MT_POSITION_Y, y); 509 } 510 511 static void alps_report_mt_data(struct psmouse *psmouse, int n) 512 { 513 struct alps_data *priv = psmouse->private; 514 struct input_dev *dev = psmouse->dev; 515 struct alps_fields *f = &priv->f; 516 int i, slot[MAX_TOUCHES]; 517 518 input_mt_assign_slots(dev, slot, f->mt, n, 0); 519 for (i = 0; i < n; i++) 520 alps_set_slot(dev, slot[i], f->mt[i].x, f->mt[i].y); 521 522 input_mt_sync_frame(dev); 523 } 524 525 static void alps_report_semi_mt_data(struct psmouse *psmouse, int fingers) 526 { 527 struct alps_data *priv = psmouse->private; 528 struct input_dev *dev = psmouse->dev; 529 struct alps_fields *f = &priv->f; 530 531 /* Use st data when we don't have mt data */ 532 if (fingers < 2) { 533 f->mt[0].x = f->st.x; 534 f->mt[0].y = f->st.y; 535 fingers = f->pressure > 0 ? 1 : 0; 536 priv->second_touch = -1; 537 } 538 539 if (fingers >= 1) 540 alps_set_slot(dev, 0, f->mt[0].x, f->mt[0].y); 541 if (fingers >= 2) 542 alps_set_slot(dev, 1, f->mt[1].x, f->mt[1].y); 543 input_mt_sync_frame(dev); 544 545 input_mt_report_finger_count(dev, fingers); 546 547 input_report_key(dev, BTN_LEFT, f->left); 548 input_report_key(dev, BTN_RIGHT, f->right); 549 input_report_key(dev, BTN_MIDDLE, f->middle); 550 551 input_report_abs(dev, ABS_PRESSURE, f->pressure); 552 553 input_sync(dev); 554 } 555 556 static void alps_process_trackstick_packet_v3(struct psmouse *psmouse) 557 { 558 struct alps_data *priv = psmouse->private; 559 unsigned char *packet = psmouse->packet; 560 struct input_dev *dev = priv->dev2; 561 int x, y, z, left, right, middle; 562 563 /* It should be a DualPoint when received trackstick packet */ 564 if (!(priv->flags & ALPS_DUALPOINT)) { 565 psmouse_warn(psmouse, 566 "Rejected trackstick packet from non DualPoint device"); 567 return; 568 } 569 570 /* Sanity check packet */ 571 if (!(packet[0] & 0x40)) { 572 psmouse_dbg(psmouse, "Bad trackstick packet, discarding\n"); 573 return; 574 } 575 576 /* 577 * There's a special packet that seems to indicate the end 578 * of a stream of trackstick data. Filter these out. 579 */ 580 if (packet[1] == 0x7f && packet[2] == 0x7f && packet[4] == 0x7f) 581 return; 582 583 x = (s8)(((packet[0] & 0x20) << 2) | (packet[1] & 0x7f)); 584 y = (s8)(((packet[0] & 0x10) << 3) | (packet[2] & 0x7f)); 585 z = packet[4] & 0x7f; 586 587 /* 588 * The x and y values tend to be quite large, and when used 589 * alone the trackstick is difficult to use. Scale them down 590 * to compensate. 591 */ 592 x /= 8; 593 y /= 8; 594 595 input_report_rel(dev, REL_X, x); 596 input_report_rel(dev, REL_Y, -y); 597 input_report_abs(dev, ABS_PRESSURE, z); 598 599 /* 600 * Most ALPS models report the trackstick buttons in the touchpad 601 * packets, but a few report them here. No reliable way has been 602 * found to differentiate between the models upfront, so we enable 603 * the quirk in response to seeing a button press in the trackstick 604 * packet. 605 */ 606 left = packet[3] & 0x01; 607 right = packet[3] & 0x02; 608 middle = packet[3] & 0x04; 609 610 if (!(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) && 611 (left || right || middle)) 612 priv->quirks |= ALPS_QUIRK_TRACKSTICK_BUTTONS; 613 614 if (priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS) { 615 input_report_key(dev, BTN_LEFT, left); 616 input_report_key(dev, BTN_RIGHT, right); 617 input_report_key(dev, BTN_MIDDLE, middle); 618 } 619 620 input_sync(dev); 621 return; 622 } 623 624 static void alps_decode_buttons_v3(struct alps_fields *f, unsigned char *p) 625 { 626 f->left = !!(p[3] & 0x01); 627 f->right = !!(p[3] & 0x02); 628 f->middle = !!(p[3] & 0x04); 629 630 f->ts_left = !!(p[3] & 0x10); 631 f->ts_right = !!(p[3] & 0x20); 632 f->ts_middle = !!(p[3] & 0x40); 633 } 634 635 static int alps_decode_pinnacle(struct alps_fields *f, unsigned char *p, 636 struct psmouse *psmouse) 637 { 638 f->first_mp = !!(p[4] & 0x40); 639 f->is_mp = !!(p[0] & 0x40); 640 641 if (f->is_mp) { 642 f->fingers = (p[5] & 0x3) + 1; 643 f->x_map = ((p[4] & 0x7e) << 8) | 644 ((p[1] & 0x7f) << 2) | 645 ((p[0] & 0x30) >> 4); 646 f->y_map = ((p[3] & 0x70) << 4) | 647 ((p[2] & 0x7f) << 1) | 648 (p[4] & 0x01); 649 } else { 650 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) | 651 ((p[0] & 0x30) >> 4); 652 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f); 653 f->pressure = p[5] & 0x7f; 654 655 alps_decode_buttons_v3(f, p); 656 } 657 658 return 0; 659 } 660 661 static int alps_decode_rushmore(struct alps_fields *f, unsigned char *p, 662 struct psmouse *psmouse) 663 { 664 f->first_mp = !!(p[4] & 0x40); 665 f->is_mp = !!(p[5] & 0x40); 666 667 if (f->is_mp) { 668 f->fingers = max((p[5] & 0x3), ((p[5] >> 2) & 0x3)) + 1; 669 f->x_map = ((p[5] & 0x10) << 11) | 670 ((p[4] & 0x7e) << 8) | 671 ((p[1] & 0x7f) << 2) | 672 ((p[0] & 0x30) >> 4); 673 f->y_map = ((p[5] & 0x20) << 6) | 674 ((p[3] & 0x70) << 4) | 675 ((p[2] & 0x7f) << 1) | 676 (p[4] & 0x01); 677 } else { 678 f->st.x = ((p[1] & 0x7f) << 4) | ((p[4] & 0x30) >> 2) | 679 ((p[0] & 0x30) >> 4); 680 f->st.y = ((p[2] & 0x7f) << 4) | (p[4] & 0x0f); 681 f->pressure = p[5] & 0x7f; 682 683 alps_decode_buttons_v3(f, p); 684 } 685 686 return 0; 687 } 688 689 static int alps_decode_dolphin(struct alps_fields *f, unsigned char *p, 690 struct psmouse *psmouse) 691 { 692 u64 palm_data = 0; 693 struct alps_data *priv = psmouse->private; 694 695 f->first_mp = !!(p[0] & 0x02); 696 f->is_mp = !!(p[0] & 0x20); 697 698 if (!f->is_mp) { 699 f->st.x = ((p[1] & 0x7f) | ((p[4] & 0x0f) << 7)); 700 f->st.y = ((p[2] & 0x7f) | ((p[4] & 0xf0) << 3)); 701 f->pressure = (p[0] & 4) ? 0 : p[5] & 0x7f; 702 alps_decode_buttons_v3(f, p); 703 } else { 704 f->fingers = ((p[0] & 0x6) >> 1 | 705 (p[0] & 0x10) >> 2); 706 707 palm_data = (p[1] & 0x7f) | 708 ((p[2] & 0x7f) << 7) | 709 ((p[4] & 0x7f) << 14) | 710 ((p[5] & 0x7f) << 21) | 711 ((p[3] & 0x07) << 28) | 712 (((u64)p[3] & 0x70) << 27) | 713 (((u64)p[0] & 0x01) << 34); 714 715 /* Y-profile is stored in P(0) to p(n-1), n = y_bits; */ 716 f->y_map = palm_data & (BIT(priv->y_bits) - 1); 717 718 /* X-profile is stored in p(n) to p(n+m-1), m = x_bits; */ 719 f->x_map = (palm_data >> priv->y_bits) & 720 (BIT(priv->x_bits) - 1); 721 } 722 723 return 0; 724 } 725 726 static void alps_process_touchpad_packet_v3_v5(struct psmouse *psmouse) 727 { 728 struct alps_data *priv = psmouse->private; 729 unsigned char *packet = psmouse->packet; 730 struct input_dev *dev2 = priv->dev2; 731 struct alps_fields *f = &priv->f; 732 int fingers = 0; 733 734 memset(f, 0, sizeof(*f)); 735 736 priv->decode_fields(f, packet, psmouse); 737 738 /* 739 * There's no single feature of touchpad position and bitmap packets 740 * that can be used to distinguish between them. We rely on the fact 741 * that a bitmap packet should always follow a position packet with 742 * bit 6 of packet[4] set. 743 */ 744 if (priv->multi_packet) { 745 /* 746 * Sometimes a position packet will indicate a multi-packet 747 * sequence, but then what follows is another position 748 * packet. Check for this, and when it happens process the 749 * position packet as usual. 750 */ 751 if (f->is_mp) { 752 fingers = f->fingers; 753 /* 754 * Bitmap processing uses position packet's coordinate 755 * data, so we need to do decode it first. 756 */ 757 priv->decode_fields(f, priv->multi_data, psmouse); 758 if (alps_process_bitmap(priv, f) == 0) 759 fingers = 0; /* Use st data */ 760 } else { 761 priv->multi_packet = 0; 762 } 763 } 764 765 /* 766 * Bit 6 of byte 0 is not usually set in position packets. The only 767 * times it seems to be set is in situations where the data is 768 * suspect anyway, e.g. a palm resting flat on the touchpad. Given 769 * this combined with the fact that this bit is useful for filtering 770 * out misidentified bitmap packets, we reject anything with this 771 * bit set. 772 */ 773 if (f->is_mp) 774 return; 775 776 if (!priv->multi_packet && f->first_mp) { 777 priv->multi_packet = 1; 778 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 779 return; 780 } 781 782 priv->multi_packet = 0; 783 784 /* 785 * Sometimes the hardware sends a single packet with z = 0 786 * in the middle of a stream. Real releases generate packets 787 * with x, y, and z all zero, so these seem to be flukes. 788 * Ignore them. 789 */ 790 if (f->st.x && f->st.y && !f->pressure) 791 return; 792 793 alps_report_semi_mt_data(psmouse, fingers); 794 795 if ((priv->flags & ALPS_DUALPOINT) && 796 !(priv->quirks & ALPS_QUIRK_TRACKSTICK_BUTTONS)) { 797 input_report_key(dev2, BTN_LEFT, f->ts_left); 798 input_report_key(dev2, BTN_RIGHT, f->ts_right); 799 input_report_key(dev2, BTN_MIDDLE, f->ts_middle); 800 input_sync(dev2); 801 } 802 } 803 804 static void alps_process_packet_v3(struct psmouse *psmouse) 805 { 806 unsigned char *packet = psmouse->packet; 807 808 /* 809 * v3 protocol packets come in three types, two representing 810 * touchpad data and one representing trackstick data. 811 * Trackstick packets seem to be distinguished by always 812 * having 0x3f in the last byte. This value has never been 813 * observed in the last byte of either of the other types 814 * of packets. 815 */ 816 if (packet[5] == 0x3f) { 817 alps_process_trackstick_packet_v3(psmouse); 818 return; 819 } 820 821 alps_process_touchpad_packet_v3_v5(psmouse); 822 } 823 824 static void alps_process_packet_v6(struct psmouse *psmouse) 825 { 826 struct alps_data *priv = psmouse->private; 827 unsigned char *packet = psmouse->packet; 828 struct input_dev *dev = psmouse->dev; 829 struct input_dev *dev2 = priv->dev2; 830 int x, y, z; 831 832 /* 833 * We can use Byte5 to distinguish if the packet is from Touchpad 834 * or Trackpoint. 835 * Touchpad: 0 - 0x7E 836 * Trackpoint: 0x7F 837 */ 838 if (packet[5] == 0x7F) { 839 /* It should be a DualPoint when received Trackpoint packet */ 840 if (!(priv->flags & ALPS_DUALPOINT)) { 841 psmouse_warn(psmouse, 842 "Rejected trackstick packet from non DualPoint device"); 843 return; 844 } 845 846 /* Trackpoint packet */ 847 x = packet[1] | ((packet[3] & 0x20) << 2); 848 y = packet[2] | ((packet[3] & 0x40) << 1); 849 z = packet[4]; 850 851 /* To prevent the cursor jump when finger lifted */ 852 if (x == 0x7F && y == 0x7F && z == 0x7F) 853 x = y = z = 0; 854 855 /* Divide 4 since trackpoint's speed is too fast */ 856 input_report_rel(dev2, REL_X, (s8)x / 4); 857 input_report_rel(dev2, REL_Y, -((s8)y / 4)); 858 859 psmouse_report_standard_buttons(dev2, packet[3]); 860 861 input_sync(dev2); 862 return; 863 } 864 865 /* Touchpad packet */ 866 x = packet[1] | ((packet[3] & 0x78) << 4); 867 y = packet[2] | ((packet[4] & 0x78) << 4); 868 z = packet[5]; 869 870 if (z > 30) 871 input_report_key(dev, BTN_TOUCH, 1); 872 if (z < 25) 873 input_report_key(dev, BTN_TOUCH, 0); 874 875 if (z > 0) { 876 input_report_abs(dev, ABS_X, x); 877 input_report_abs(dev, ABS_Y, y); 878 } 879 880 input_report_abs(dev, ABS_PRESSURE, z); 881 input_report_key(dev, BTN_TOOL_FINGER, z > 0); 882 883 /* v6 touchpad does not have middle button */ 884 packet[3] &= ~BIT(2); 885 psmouse_report_standard_buttons(dev2, packet[3]); 886 887 input_sync(dev); 888 } 889 890 static void alps_process_packet_v4(struct psmouse *psmouse) 891 { 892 struct alps_data *priv = psmouse->private; 893 unsigned char *packet = psmouse->packet; 894 struct alps_fields *f = &priv->f; 895 int offset; 896 897 /* 898 * v4 has a 6-byte encoding for bitmap data, but this data is 899 * broken up between 3 normal packets. Use priv->multi_packet to 900 * track our position in the bitmap packet. 901 */ 902 if (packet[6] & 0x40) { 903 /* sync, reset position */ 904 priv->multi_packet = 0; 905 } 906 907 if (WARN_ON_ONCE(priv->multi_packet > 2)) 908 return; 909 910 offset = 2 * priv->multi_packet; 911 priv->multi_data[offset] = packet[6]; 912 priv->multi_data[offset + 1] = packet[7]; 913 914 f->left = !!(packet[4] & 0x01); 915 f->right = !!(packet[4] & 0x02); 916 917 f->st.x = ((packet[1] & 0x7f) << 4) | ((packet[3] & 0x30) >> 2) | 918 ((packet[0] & 0x30) >> 4); 919 f->st.y = ((packet[2] & 0x7f) << 4) | (packet[3] & 0x0f); 920 f->pressure = packet[5] & 0x7f; 921 922 if (++priv->multi_packet > 2) { 923 priv->multi_packet = 0; 924 925 f->x_map = ((priv->multi_data[2] & 0x1f) << 10) | 926 ((priv->multi_data[3] & 0x60) << 3) | 927 ((priv->multi_data[0] & 0x3f) << 2) | 928 ((priv->multi_data[1] & 0x60) >> 5); 929 f->y_map = ((priv->multi_data[5] & 0x01) << 10) | 930 ((priv->multi_data[3] & 0x1f) << 5) | 931 (priv->multi_data[1] & 0x1f); 932 933 f->fingers = alps_process_bitmap(priv, f); 934 } 935 936 alps_report_semi_mt_data(psmouse, f->fingers); 937 } 938 939 static bool alps_is_valid_package_v7(struct psmouse *psmouse) 940 { 941 switch (psmouse->pktcnt) { 942 case 3: 943 return (psmouse->packet[2] & 0x40) == 0x40; 944 case 4: 945 return (psmouse->packet[3] & 0x48) == 0x48; 946 case 6: 947 return (psmouse->packet[5] & 0x40) == 0x00; 948 } 949 return true; 950 } 951 952 static unsigned char alps_get_packet_id_v7(char *byte) 953 { 954 unsigned char packet_id; 955 956 if (byte[4] & 0x40) 957 packet_id = V7_PACKET_ID_TWO; 958 else if (byte[4] & 0x01) 959 packet_id = V7_PACKET_ID_MULTI; 960 else if ((byte[0] & 0x10) && !(byte[4] & 0x43)) 961 packet_id = V7_PACKET_ID_NEW; 962 else if (byte[1] == 0x00 && byte[4] == 0x00) 963 packet_id = V7_PACKET_ID_IDLE; 964 else 965 packet_id = V7_PACKET_ID_UNKNOWN; 966 967 return packet_id; 968 } 969 970 static void alps_get_finger_coordinate_v7(struct input_mt_pos *mt, 971 unsigned char *pkt, 972 unsigned char pkt_id) 973 { 974 mt[0].x = ((pkt[2] & 0x80) << 4); 975 mt[0].x |= ((pkt[2] & 0x3F) << 5); 976 mt[0].x |= ((pkt[3] & 0x30) >> 1); 977 mt[0].x |= (pkt[3] & 0x07); 978 mt[0].y = (pkt[1] << 3) | (pkt[0] & 0x07); 979 980 mt[1].x = ((pkt[3] & 0x80) << 4); 981 mt[1].x |= ((pkt[4] & 0x80) << 3); 982 mt[1].x |= ((pkt[4] & 0x3F) << 4); 983 mt[1].y = ((pkt[5] & 0x80) << 3); 984 mt[1].y |= ((pkt[5] & 0x3F) << 4); 985 986 switch (pkt_id) { 987 case V7_PACKET_ID_TWO: 988 mt[1].x &= ~0x000F; 989 mt[1].y |= 0x000F; 990 /* Detect false-positive touches where x & y report max value */ 991 if (mt[1].y == 0x7ff && mt[1].x == 0xff0) { 992 mt[1].x = 0; 993 /* y gets set to 0 at the end of this function */ 994 } 995 break; 996 997 case V7_PACKET_ID_MULTI: 998 mt[1].x &= ~0x003F; 999 mt[1].y &= ~0x0020; 1000 mt[1].y |= ((pkt[4] & 0x02) << 4); 1001 mt[1].y |= 0x001F; 1002 break; 1003 1004 case V7_PACKET_ID_NEW: 1005 mt[1].x &= ~0x003F; 1006 mt[1].x |= (pkt[0] & 0x20); 1007 mt[1].y |= 0x000F; 1008 break; 1009 } 1010 1011 mt[0].y = 0x7FF - mt[0].y; 1012 mt[1].y = 0x7FF - mt[1].y; 1013 } 1014 1015 static int alps_get_mt_count(struct input_mt_pos *mt) 1016 { 1017 int i, fingers = 0; 1018 1019 for (i = 0; i < MAX_TOUCHES; i++) { 1020 if (mt[i].x != 0 || mt[i].y != 0) 1021 fingers++; 1022 } 1023 1024 return fingers; 1025 } 1026 1027 static int alps_decode_packet_v7(struct alps_fields *f, 1028 unsigned char *p, 1029 struct psmouse *psmouse) 1030 { 1031 struct alps_data *priv = psmouse->private; 1032 unsigned char pkt_id; 1033 1034 pkt_id = alps_get_packet_id_v7(p); 1035 if (pkt_id == V7_PACKET_ID_IDLE) 1036 return 0; 1037 if (pkt_id == V7_PACKET_ID_UNKNOWN) 1038 return -1; 1039 /* 1040 * NEW packets are send to indicate a discontinuity in the finger 1041 * coordinate reporting. Specifically a finger may have moved from 1042 * slot 0 to 1 or vice versa. INPUT_MT_TRACK takes care of this for 1043 * us. 1044 * 1045 * NEW packets have 3 problems: 1046 * 1) They do not contain middle / right button info (on non clickpads) 1047 * this can be worked around by preserving the old button state 1048 * 2) They do not contain an accurate fingercount, and they are 1049 * typically send when the number of fingers changes. We cannot use 1050 * the old finger count as that may mismatch with the amount of 1051 * touch coordinates we've available in the NEW packet 1052 * 3) Their x data for the second touch is inaccurate leading to 1053 * a possible jump of the x coordinate by 16 units when the first 1054 * non NEW packet comes in 1055 * Since problems 2 & 3 cannot be worked around, just ignore them. 1056 */ 1057 if (pkt_id == V7_PACKET_ID_NEW) 1058 return 1; 1059 1060 alps_get_finger_coordinate_v7(f->mt, p, pkt_id); 1061 1062 if (pkt_id == V7_PACKET_ID_TWO) 1063 f->fingers = alps_get_mt_count(f->mt); 1064 else /* pkt_id == V7_PACKET_ID_MULTI */ 1065 f->fingers = 3 + (p[5] & 0x03); 1066 1067 f->left = (p[0] & 0x80) >> 7; 1068 if (priv->flags & ALPS_BUTTONPAD) { 1069 if (p[0] & 0x20) 1070 f->fingers++; 1071 if (p[0] & 0x10) 1072 f->fingers++; 1073 } else { 1074 f->right = (p[0] & 0x20) >> 5; 1075 f->middle = (p[0] & 0x10) >> 4; 1076 } 1077 1078 /* Sometimes a single touch is reported in mt[1] rather then mt[0] */ 1079 if (f->fingers == 1 && f->mt[0].x == 0 && f->mt[0].y == 0) { 1080 f->mt[0].x = f->mt[1].x; 1081 f->mt[0].y = f->mt[1].y; 1082 f->mt[1].x = 0; 1083 f->mt[1].y = 0; 1084 } 1085 1086 return 0; 1087 } 1088 1089 static void alps_process_trackstick_packet_v7(struct psmouse *psmouse) 1090 { 1091 struct alps_data *priv = psmouse->private; 1092 unsigned char *packet = psmouse->packet; 1093 struct input_dev *dev2 = priv->dev2; 1094 int x, y, z; 1095 1096 /* It should be a DualPoint when received trackstick packet */ 1097 if (!(priv->flags & ALPS_DUALPOINT)) { 1098 psmouse_warn(psmouse, 1099 "Rejected trackstick packet from non DualPoint device"); 1100 return; 1101 } 1102 1103 x = ((packet[2] & 0xbf)) | ((packet[3] & 0x10) << 2); 1104 y = (packet[3] & 0x07) | (packet[4] & 0xb8) | 1105 ((packet[3] & 0x20) << 1); 1106 z = (packet[5] & 0x3f) | ((packet[3] & 0x80) >> 1); 1107 1108 input_report_rel(dev2, REL_X, (s8)x); 1109 input_report_rel(dev2, REL_Y, -((s8)y)); 1110 input_report_abs(dev2, ABS_PRESSURE, z); 1111 1112 psmouse_report_standard_buttons(dev2, packet[1]); 1113 1114 input_sync(dev2); 1115 } 1116 1117 static void alps_process_touchpad_packet_v7(struct psmouse *psmouse) 1118 { 1119 struct alps_data *priv = psmouse->private; 1120 struct input_dev *dev = psmouse->dev; 1121 struct alps_fields *f = &priv->f; 1122 1123 memset(f, 0, sizeof(*f)); 1124 1125 if (priv->decode_fields(f, psmouse->packet, psmouse)) 1126 return; 1127 1128 alps_report_mt_data(psmouse, alps_get_mt_count(f->mt)); 1129 1130 input_mt_report_finger_count(dev, f->fingers); 1131 1132 input_report_key(dev, BTN_LEFT, f->left); 1133 input_report_key(dev, BTN_RIGHT, f->right); 1134 input_report_key(dev, BTN_MIDDLE, f->middle); 1135 1136 input_sync(dev); 1137 } 1138 1139 static void alps_process_packet_v7(struct psmouse *psmouse) 1140 { 1141 unsigned char *packet = psmouse->packet; 1142 1143 if (packet[0] == 0x48 && (packet[4] & 0x47) == 0x06) 1144 alps_process_trackstick_packet_v7(psmouse); 1145 else 1146 alps_process_touchpad_packet_v7(psmouse); 1147 } 1148 1149 static enum SS4_PACKET_ID alps_get_pkt_id_ss4_v2(unsigned char *byte) 1150 { 1151 enum SS4_PACKET_ID pkt_id = SS4_PACKET_ID_IDLE; 1152 1153 switch (byte[3] & 0x30) { 1154 case 0x00: 1155 if (SS4_IS_IDLE_V2(byte)) { 1156 pkt_id = SS4_PACKET_ID_IDLE; 1157 } else { 1158 pkt_id = SS4_PACKET_ID_ONE; 1159 } 1160 break; 1161 case 0x10: 1162 /* two-finger finger positions */ 1163 pkt_id = SS4_PACKET_ID_TWO; 1164 break; 1165 case 0x20: 1166 /* stick pointer */ 1167 pkt_id = SS4_PACKET_ID_STICK; 1168 break; 1169 case 0x30: 1170 /* third and fourth finger positions */ 1171 pkt_id = SS4_PACKET_ID_MULTI; 1172 break; 1173 } 1174 1175 return pkt_id; 1176 } 1177 1178 static int alps_decode_ss4_v2(struct alps_fields *f, 1179 unsigned char *p, struct psmouse *psmouse) 1180 { 1181 struct alps_data *priv = psmouse->private; 1182 enum SS4_PACKET_ID pkt_id; 1183 unsigned int no_data_x, no_data_y; 1184 1185 pkt_id = alps_get_pkt_id_ss4_v2(p); 1186 1187 /* Current packet is 1Finger coordinate packet */ 1188 switch (pkt_id) { 1189 case SS4_PACKET_ID_ONE: 1190 f->mt[0].x = SS4_1F_X_V2(p); 1191 f->mt[0].y = SS4_1F_Y_V2(p); 1192 f->pressure = ((SS4_1F_Z_V2(p)) * 2) & 0x7f; 1193 /* 1194 * When a button is held the device will give us events 1195 * with x, y, and pressure of 0. This causes annoying jumps 1196 * if a touch is released while the button is held. 1197 * Handle this by claiming zero contacts. 1198 */ 1199 f->fingers = f->pressure > 0 ? 1 : 0; 1200 f->first_mp = 0; 1201 f->is_mp = 0; 1202 break; 1203 1204 case SS4_PACKET_ID_TWO: 1205 if (priv->flags & ALPS_BUTTONPAD) { 1206 if (IS_SS4PLUS_DEV(priv->dev_id)) { 1207 f->mt[0].x = SS4_PLUS_BTL_MF_X_V2(p, 0); 1208 f->mt[1].x = SS4_PLUS_BTL_MF_X_V2(p, 1); 1209 } else { 1210 f->mt[0].x = SS4_BTL_MF_X_V2(p, 0); 1211 f->mt[1].x = SS4_BTL_MF_X_V2(p, 1); 1212 } 1213 f->mt[0].y = SS4_BTL_MF_Y_V2(p, 0); 1214 f->mt[1].y = SS4_BTL_MF_Y_V2(p, 1); 1215 } else { 1216 if (IS_SS4PLUS_DEV(priv->dev_id)) { 1217 f->mt[0].x = SS4_PLUS_STD_MF_X_V2(p, 0); 1218 f->mt[1].x = SS4_PLUS_STD_MF_X_V2(p, 1); 1219 } else { 1220 f->mt[0].x = SS4_STD_MF_X_V2(p, 0); 1221 f->mt[1].x = SS4_STD_MF_X_V2(p, 1); 1222 } 1223 f->mt[0].y = SS4_STD_MF_Y_V2(p, 0); 1224 f->mt[1].y = SS4_STD_MF_Y_V2(p, 1); 1225 } 1226 f->pressure = SS4_MF_Z_V2(p, 0) ? 0x30 : 0; 1227 1228 if (SS4_IS_MF_CONTINUE(p)) { 1229 f->first_mp = 1; 1230 } else { 1231 f->fingers = 2; 1232 f->first_mp = 0; 1233 } 1234 f->is_mp = 0; 1235 1236 break; 1237 1238 case SS4_PACKET_ID_MULTI: 1239 if (priv->flags & ALPS_BUTTONPAD) { 1240 if (IS_SS4PLUS_DEV(priv->dev_id)) { 1241 f->mt[2].x = SS4_PLUS_BTL_MF_X_V2(p, 0); 1242 f->mt[3].x = SS4_PLUS_BTL_MF_X_V2(p, 1); 1243 no_data_x = SS4_PLUS_MFPACKET_NO_AX_BL; 1244 } else { 1245 f->mt[2].x = SS4_BTL_MF_X_V2(p, 0); 1246 f->mt[3].x = SS4_BTL_MF_X_V2(p, 1); 1247 no_data_x = SS4_MFPACKET_NO_AX_BL; 1248 } 1249 no_data_y = SS4_MFPACKET_NO_AY_BL; 1250 1251 f->mt[2].y = SS4_BTL_MF_Y_V2(p, 0); 1252 f->mt[3].y = SS4_BTL_MF_Y_V2(p, 1); 1253 } else { 1254 if (IS_SS4PLUS_DEV(priv->dev_id)) { 1255 f->mt[2].x = SS4_PLUS_STD_MF_X_V2(p, 0); 1256 f->mt[3].x = SS4_PLUS_STD_MF_X_V2(p, 1); 1257 no_data_x = SS4_PLUS_MFPACKET_NO_AX; 1258 } else { 1259 f->mt[2].x = SS4_STD_MF_X_V2(p, 0); 1260 f->mt[3].x = SS4_STD_MF_X_V2(p, 1); 1261 no_data_x = SS4_MFPACKET_NO_AX; 1262 } 1263 no_data_y = SS4_MFPACKET_NO_AY; 1264 1265 f->mt[2].y = SS4_STD_MF_Y_V2(p, 0); 1266 f->mt[3].y = SS4_STD_MF_Y_V2(p, 1); 1267 } 1268 1269 f->first_mp = 0; 1270 f->is_mp = 1; 1271 1272 if (SS4_IS_5F_DETECTED(p)) { 1273 f->fingers = 5; 1274 } else if (f->mt[3].x == no_data_x && 1275 f->mt[3].y == no_data_y) { 1276 f->mt[3].x = 0; 1277 f->mt[3].y = 0; 1278 f->fingers = 3; 1279 } else { 1280 f->fingers = 4; 1281 } 1282 break; 1283 1284 case SS4_PACKET_ID_STICK: 1285 /* 1286 * x, y, and pressure are decoded in 1287 * alps_process_packet_ss4_v2() 1288 */ 1289 f->first_mp = 0; 1290 f->is_mp = 0; 1291 break; 1292 1293 case SS4_PACKET_ID_IDLE: 1294 default: 1295 memset(f, 0, sizeof(struct alps_fields)); 1296 break; 1297 } 1298 1299 /* handle buttons */ 1300 if (pkt_id == SS4_PACKET_ID_STICK) { 1301 f->ts_left = !!(SS4_BTN_V2(p) & 0x01); 1302 f->ts_right = !!(SS4_BTN_V2(p) & 0x02); 1303 f->ts_middle = !!(SS4_BTN_V2(p) & 0x04); 1304 } else { 1305 f->left = !!(SS4_BTN_V2(p) & 0x01); 1306 if (!(priv->flags & ALPS_BUTTONPAD)) { 1307 f->right = !!(SS4_BTN_V2(p) & 0x02); 1308 f->middle = !!(SS4_BTN_V2(p) & 0x04); 1309 } 1310 } 1311 1312 return 0; 1313 } 1314 1315 static void alps_process_packet_ss4_v2(struct psmouse *psmouse) 1316 { 1317 struct alps_data *priv = psmouse->private; 1318 unsigned char *packet = psmouse->packet; 1319 struct input_dev *dev = psmouse->dev; 1320 struct input_dev *dev2 = priv->dev2; 1321 struct alps_fields *f = &priv->f; 1322 1323 memset(f, 0, sizeof(struct alps_fields)); 1324 priv->decode_fields(f, packet, psmouse); 1325 if (priv->multi_packet) { 1326 /* 1327 * Sometimes the first packet will indicate a multi-packet 1328 * sequence, but sometimes the next multi-packet would not 1329 * come. Check for this, and when it happens process the 1330 * position packet as usual. 1331 */ 1332 if (f->is_mp) { 1333 /* Now process the 1st packet */ 1334 priv->decode_fields(f, priv->multi_data, psmouse); 1335 } else { 1336 priv->multi_packet = 0; 1337 } 1338 } 1339 1340 /* 1341 * "f.is_mp" would always be '0' after merging the 1st and 2nd packet. 1342 * When it is set, it means 2nd packet comes without 1st packet come. 1343 */ 1344 if (f->is_mp) 1345 return; 1346 1347 /* Save the first packet */ 1348 if (!priv->multi_packet && f->first_mp) { 1349 priv->multi_packet = 1; 1350 memcpy(priv->multi_data, packet, sizeof(priv->multi_data)); 1351 return; 1352 } 1353 1354 priv->multi_packet = 0; 1355 1356 /* Report trackstick */ 1357 if (alps_get_pkt_id_ss4_v2(packet) == SS4_PACKET_ID_STICK) { 1358 if (!(priv->flags & ALPS_DUALPOINT)) { 1359 psmouse_warn(psmouse, 1360 "Rejected trackstick packet from non DualPoint device"); 1361 return; 1362 } 1363 1364 input_report_rel(dev2, REL_X, SS4_TS_X_V2(packet)); 1365 input_report_rel(dev2, REL_Y, SS4_TS_Y_V2(packet)); 1366 input_report_abs(dev2, ABS_PRESSURE, SS4_TS_Z_V2(packet)); 1367 1368 input_report_key(dev2, BTN_LEFT, f->ts_left); 1369 input_report_key(dev2, BTN_RIGHT, f->ts_right); 1370 input_report_key(dev2, BTN_MIDDLE, f->ts_middle); 1371 1372 input_sync(dev2); 1373 return; 1374 } 1375 1376 /* Report touchpad */ 1377 alps_report_mt_data(psmouse, (f->fingers <= 4) ? f->fingers : 4); 1378 1379 input_mt_report_finger_count(dev, f->fingers); 1380 1381 input_report_key(dev, BTN_LEFT, f->left); 1382 input_report_key(dev, BTN_RIGHT, f->right); 1383 input_report_key(dev, BTN_MIDDLE, f->middle); 1384 1385 input_report_abs(dev, ABS_PRESSURE, f->pressure); 1386 input_sync(dev); 1387 } 1388 1389 static bool alps_is_valid_package_ss4_v2(struct psmouse *psmouse) 1390 { 1391 if (psmouse->pktcnt == 4 && ((psmouse->packet[3] & 0x08) != 0x08)) 1392 return false; 1393 if (psmouse->pktcnt == 6 && ((psmouse->packet[5] & 0x10) != 0x0)) 1394 return false; 1395 return true; 1396 } 1397 1398 static DEFINE_MUTEX(alps_mutex); 1399 1400 static int alps_do_register_bare_ps2_mouse(struct alps_data *priv) 1401 { 1402 struct psmouse *psmouse = priv->psmouse; 1403 struct input_dev *dev3; 1404 int error; 1405 1406 dev3 = input_allocate_device(); 1407 if (!dev3) { 1408 psmouse_err(psmouse, "failed to allocate secondary device\n"); 1409 return -ENOMEM; 1410 } 1411 1412 scnprintf(priv->phys3, sizeof(priv->phys3), "%s/%s", 1413 psmouse->ps2dev.serio->phys, 1414 (priv->dev2 ? "input2" : "input1")); 1415 dev3->phys = priv->phys3; 1416 1417 /* 1418 * format of input device name is: "protocol vendor name" 1419 * see function psmouse_switch_protocol() in psmouse-base.c 1420 */ 1421 dev3->name = "PS/2 ALPS Mouse"; 1422 1423 dev3->id.bustype = BUS_I8042; 1424 dev3->id.vendor = 0x0002; 1425 dev3->id.product = PSMOUSE_PS2; 1426 dev3->id.version = 0x0000; 1427 dev3->dev.parent = &psmouse->ps2dev.serio->dev; 1428 1429 input_set_capability(dev3, EV_REL, REL_X); 1430 input_set_capability(dev3, EV_REL, REL_Y); 1431 input_set_capability(dev3, EV_KEY, BTN_LEFT); 1432 input_set_capability(dev3, EV_KEY, BTN_RIGHT); 1433 input_set_capability(dev3, EV_KEY, BTN_MIDDLE); 1434 1435 __set_bit(INPUT_PROP_POINTER, dev3->propbit); 1436 1437 error = input_register_device(dev3); 1438 if (error) { 1439 psmouse_err(psmouse, 1440 "failed to register secondary device: %d\n", 1441 error); 1442 goto err_free_input; 1443 } 1444 1445 priv->dev3 = dev3; 1446 return 0; 1447 1448 err_free_input: 1449 input_free_device(dev3); 1450 return error; 1451 } 1452 1453 static void alps_register_bare_ps2_mouse(struct work_struct *work) 1454 { 1455 struct alps_data *priv = container_of(work, struct alps_data, 1456 dev3_register_work); 1457 int error; 1458 1459 guard(mutex)(&alps_mutex); 1460 1461 if (!priv->dev3) { 1462 error = alps_do_register_bare_ps2_mouse(priv); 1463 if (error) { 1464 /* 1465 * Save the error code so that we can detect that we 1466 * already tried to create the device. 1467 */ 1468 priv->dev3 = ERR_PTR(error); 1469 } 1470 } 1471 } 1472 1473 static void alps_report_bare_ps2_packet(struct psmouse *psmouse, 1474 unsigned char packet[], 1475 bool report_buttons) 1476 { 1477 struct alps_data *priv = psmouse->private; 1478 struct input_dev *dev, *dev2 = NULL; 1479 1480 /* Figure out which device to use to report the bare packet */ 1481 if (priv->proto_version == ALPS_PROTO_V2 && 1482 (priv->flags & ALPS_DUALPOINT)) { 1483 /* On V2 devices the DualPoint Stick reports bare packets */ 1484 dev = priv->dev2; 1485 dev2 = psmouse->dev; 1486 } else if (unlikely(IS_ERR_OR_NULL(priv->dev3))) { 1487 /* Register dev3 mouse if we received PS/2 packet first time */ 1488 if (!IS_ERR(priv->dev3)) 1489 schedule_work(&priv->dev3_register_work); 1490 return; 1491 } else { 1492 dev = priv->dev3; 1493 } 1494 1495 if (report_buttons) 1496 alps_report_buttons(dev, dev2, 1497 packet[0] & 1, packet[0] & 2, packet[0] & 4); 1498 1499 psmouse_report_standard_motion(dev, packet); 1500 1501 input_sync(dev); 1502 } 1503 1504 static psmouse_ret_t alps_handle_interleaved_ps2(struct psmouse *psmouse) 1505 { 1506 struct alps_data *priv = psmouse->private; 1507 1508 if (psmouse->pktcnt < 6) 1509 return PSMOUSE_GOOD_DATA; 1510 1511 if (psmouse->pktcnt == 6) { 1512 /* 1513 * Start a timer to flush the packet if it ends up last 1514 * 6-byte packet in the stream. Timer needs to fire 1515 * psmouse core times out itself. 20 ms should be enough 1516 * to decide if we are getting more data or not. 1517 */ 1518 mod_timer(&priv->timer, jiffies + msecs_to_jiffies(20)); 1519 return PSMOUSE_GOOD_DATA; 1520 } 1521 1522 timer_delete(&priv->timer); 1523 1524 if (psmouse->packet[6] & 0x80) { 1525 1526 /* 1527 * Highest bit is set - that means we either had 1528 * complete ALPS packet and this is start of the 1529 * next packet or we got garbage. 1530 */ 1531 1532 if (((psmouse->packet[3] | 1533 psmouse->packet[4] | 1534 psmouse->packet[5]) & 0x80) || 1535 (!alps_is_valid_first_byte(priv, psmouse->packet[6]))) { 1536 psmouse_dbg(psmouse, 1537 "refusing packet %4ph (suspected interleaved ps/2)\n", 1538 psmouse->packet + 3); 1539 return PSMOUSE_BAD_DATA; 1540 } 1541 1542 priv->process_packet(psmouse); 1543 1544 /* Continue with the next packet */ 1545 psmouse->packet[0] = psmouse->packet[6]; 1546 psmouse->pktcnt = 1; 1547 1548 } else { 1549 1550 /* 1551 * High bit is 0 - that means that we indeed got a PS/2 1552 * packet in the middle of ALPS packet. 1553 * 1554 * There is also possibility that we got 6-byte ALPS 1555 * packet followed by 3-byte packet from trackpoint. We 1556 * can not distinguish between these 2 scenarios but 1557 * because the latter is unlikely to happen in course of 1558 * normal operation (user would need to press all 1559 * buttons on the pad and start moving trackpoint 1560 * without touching the pad surface) we assume former. 1561 * Even if we are wrong the wost thing that would happen 1562 * the cursor would jump but we should not get protocol 1563 * de-synchronization. 1564 */ 1565 1566 alps_report_bare_ps2_packet(psmouse, &psmouse->packet[3], 1567 false); 1568 1569 /* 1570 * Continue with the standard ALPS protocol handling, 1571 * but make sure we won't process it as an interleaved 1572 * packet again, which may happen if all buttons are 1573 * pressed. To avoid this let's reset the 4th bit which 1574 * is normally 1. 1575 */ 1576 psmouse->packet[3] = psmouse->packet[6] & 0xf7; 1577 psmouse->pktcnt = 4; 1578 } 1579 1580 return PSMOUSE_GOOD_DATA; 1581 } 1582 1583 static void alps_flush_packet(struct timer_list *t) 1584 { 1585 struct alps_data *priv = timer_container_of(priv, t, timer); 1586 struct psmouse *psmouse = priv->psmouse; 1587 1588 guard(serio_pause_rx)(psmouse->ps2dev.serio); 1589 1590 if (psmouse->pktcnt == psmouse->pktsize) { 1591 1592 /* 1593 * We did not any more data in reasonable amount of time. 1594 * Validate the last 3 bytes and process as a standard 1595 * ALPS packet. 1596 */ 1597 if ((psmouse->packet[3] | 1598 psmouse->packet[4] | 1599 psmouse->packet[5]) & 0x80) { 1600 psmouse_dbg(psmouse, 1601 "refusing packet %3ph (suspected interleaved ps/2)\n", 1602 psmouse->packet + 3); 1603 } else { 1604 priv->process_packet(psmouse); 1605 } 1606 psmouse->pktcnt = 0; 1607 } 1608 } 1609 1610 static psmouse_ret_t alps_process_byte(struct psmouse *psmouse) 1611 { 1612 struct alps_data *priv = psmouse->private; 1613 1614 /* 1615 * Check if we are dealing with a bare PS/2 packet, presumably from 1616 * a device connected to the external PS/2 port. Because bare PS/2 1617 * protocol does not have enough constant bits to self-synchronize 1618 * properly we only do this if the device is fully synchronized. 1619 * Can not distinguish V8's first byte from PS/2 packet's 1620 */ 1621 if (priv->proto_version != ALPS_PROTO_V8 && 1622 !psmouse->out_of_sync_cnt && 1623 (psmouse->packet[0] & 0xc8) == 0x08) { 1624 1625 if (psmouse->pktcnt == 3) { 1626 alps_report_bare_ps2_packet(psmouse, psmouse->packet, 1627 true); 1628 return PSMOUSE_FULL_PACKET; 1629 } 1630 return PSMOUSE_GOOD_DATA; 1631 } 1632 1633 /* Check for PS/2 packet stuffed in the middle of ALPS packet. */ 1634 1635 if ((priv->flags & ALPS_PS2_INTERLEAVED) && 1636 psmouse->pktcnt >= 4 && (psmouse->packet[3] & 0x0f) == 0x0f) { 1637 return alps_handle_interleaved_ps2(psmouse); 1638 } 1639 1640 if (!alps_is_valid_first_byte(priv, psmouse->packet[0])) { 1641 psmouse_dbg(psmouse, 1642 "refusing packet[0] = %x (mask0 = %x, byte0 = %x)\n", 1643 psmouse->packet[0], priv->mask0, priv->byte0); 1644 return PSMOUSE_BAD_DATA; 1645 } 1646 1647 /* Bytes 2 - pktsize should have 0 in the highest bit */ 1648 if (priv->proto_version < ALPS_PROTO_V5 && 1649 psmouse->pktcnt >= 2 && psmouse->pktcnt <= psmouse->pktsize && 1650 (psmouse->packet[psmouse->pktcnt - 1] & 0x80)) { 1651 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1652 psmouse->pktcnt - 1, 1653 psmouse->packet[psmouse->pktcnt - 1]); 1654 1655 if (priv->proto_version == ALPS_PROTO_V3_RUSHMORE && 1656 psmouse->pktcnt == psmouse->pktsize) { 1657 /* 1658 * Some Dell boxes, such as Latitude E6440 or E7440 1659 * with closed lid, quite often smash last byte of 1660 * otherwise valid packet with 0xff. Given that the 1661 * next packet is very likely to be valid let's 1662 * report PSMOUSE_FULL_PACKET but not process data, 1663 * rather than reporting PSMOUSE_BAD_DATA and 1664 * filling the logs. 1665 */ 1666 return PSMOUSE_FULL_PACKET; 1667 } 1668 1669 return PSMOUSE_BAD_DATA; 1670 } 1671 1672 if ((priv->proto_version == ALPS_PROTO_V7 && 1673 !alps_is_valid_package_v7(psmouse)) || 1674 (priv->proto_version == ALPS_PROTO_V8 && 1675 !alps_is_valid_package_ss4_v2(psmouse))) { 1676 psmouse_dbg(psmouse, "refusing packet[%i] = %x\n", 1677 psmouse->pktcnt - 1, 1678 psmouse->packet[psmouse->pktcnt - 1]); 1679 return PSMOUSE_BAD_DATA; 1680 } 1681 1682 if (psmouse->pktcnt == psmouse->pktsize) { 1683 priv->process_packet(psmouse); 1684 return PSMOUSE_FULL_PACKET; 1685 } 1686 1687 return PSMOUSE_GOOD_DATA; 1688 } 1689 1690 static int alps_command_mode_send_nibble(struct psmouse *psmouse, int nibble) 1691 { 1692 struct ps2dev *ps2dev = &psmouse->ps2dev; 1693 struct alps_data *priv = psmouse->private; 1694 int command; 1695 unsigned char *param; 1696 unsigned char dummy[4]; 1697 1698 BUG_ON(nibble > 0xf); 1699 1700 command = priv->nibble_commands[nibble].command; 1701 param = (command & 0x0f00) ? 1702 dummy : (unsigned char *)&priv->nibble_commands[nibble].data; 1703 1704 if (ps2_command(ps2dev, param, command)) 1705 return -1; 1706 1707 return 0; 1708 } 1709 1710 static int alps_command_mode_set_addr(struct psmouse *psmouse, int addr) 1711 { 1712 struct ps2dev *ps2dev = &psmouse->ps2dev; 1713 struct alps_data *priv = psmouse->private; 1714 int i, nibble; 1715 1716 if (ps2_command(ps2dev, NULL, priv->addr_command)) 1717 return -1; 1718 1719 for (i = 12; i >= 0; i -= 4) { 1720 nibble = (addr >> i) & 0xf; 1721 if (alps_command_mode_send_nibble(psmouse, nibble)) 1722 return -1; 1723 } 1724 1725 return 0; 1726 } 1727 1728 static int __alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1729 { 1730 struct ps2dev *ps2dev = &psmouse->ps2dev; 1731 unsigned char param[4]; 1732 1733 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1734 return -1; 1735 1736 /* 1737 * The address being read is returned in the first two bytes 1738 * of the result. Check that this address matches the expected 1739 * address. 1740 */ 1741 if (addr != ((param[0] << 8) | param[1])) 1742 return -1; 1743 1744 return param[2]; 1745 } 1746 1747 static int alps_command_mode_read_reg(struct psmouse *psmouse, int addr) 1748 { 1749 if (alps_command_mode_set_addr(psmouse, addr)) 1750 return -1; 1751 return __alps_command_mode_read_reg(psmouse, addr); 1752 } 1753 1754 static int __alps_command_mode_write_reg(struct psmouse *psmouse, u8 value) 1755 { 1756 if (alps_command_mode_send_nibble(psmouse, (value >> 4) & 0xf)) 1757 return -1; 1758 if (alps_command_mode_send_nibble(psmouse, value & 0xf)) 1759 return -1; 1760 return 0; 1761 } 1762 1763 static int alps_command_mode_write_reg(struct psmouse *psmouse, int addr, 1764 u8 value) 1765 { 1766 if (alps_command_mode_set_addr(psmouse, addr)) 1767 return -1; 1768 return __alps_command_mode_write_reg(psmouse, value); 1769 } 1770 1771 static int alps_rpt_cmd(struct psmouse *psmouse, int init_command, 1772 int repeated_command, unsigned char *param) 1773 { 1774 struct ps2dev *ps2dev = &psmouse->ps2dev; 1775 1776 param[0] = 0; 1777 if (init_command && ps2_command(ps2dev, param, init_command)) 1778 return -EIO; 1779 1780 if (ps2_command(ps2dev, NULL, repeated_command) || 1781 ps2_command(ps2dev, NULL, repeated_command) || 1782 ps2_command(ps2dev, NULL, repeated_command)) 1783 return -EIO; 1784 1785 param[0] = param[1] = param[2] = 0xff; 1786 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 1787 return -EIO; 1788 1789 psmouse_dbg(psmouse, "%2.2X report: %3ph\n", 1790 repeated_command, param); 1791 return 0; 1792 } 1793 1794 static bool alps_check_valid_firmware_id(unsigned char id[]) 1795 { 1796 if (id[0] == 0x73) 1797 return true; 1798 1799 if (id[0] == 0x88 && 1800 (id[1] == 0x07 || 1801 id[1] == 0x08 || 1802 (id[1] & 0xf0) == 0xb0 || 1803 (id[1] & 0xf0) == 0xc0)) { 1804 return true; 1805 } 1806 1807 return false; 1808 } 1809 1810 static int alps_enter_command_mode(struct psmouse *psmouse) 1811 { 1812 unsigned char param[4]; 1813 1814 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_RESET_WRAP, param)) { 1815 psmouse_err(psmouse, "failed to enter command mode\n"); 1816 return -1; 1817 } 1818 1819 if (!alps_check_valid_firmware_id(param)) { 1820 psmouse_dbg(psmouse, 1821 "unknown response while entering command mode\n"); 1822 return -1; 1823 } 1824 return 0; 1825 } 1826 1827 static inline int alps_exit_command_mode(struct psmouse *psmouse) 1828 { 1829 struct ps2dev *ps2dev = &psmouse->ps2dev; 1830 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) 1831 return -1; 1832 return 0; 1833 } 1834 1835 /* 1836 * For DualPoint devices select the device that should respond to 1837 * subsequent commands. It looks like glidepad is behind stickpointer, 1838 * I'd thought it would be other way around... 1839 */ 1840 static int alps_passthrough_mode_v2(struct psmouse *psmouse, bool enable) 1841 { 1842 struct ps2dev *ps2dev = &psmouse->ps2dev; 1843 int cmd = enable ? PSMOUSE_CMD_SETSCALE21 : PSMOUSE_CMD_SETSCALE11; 1844 1845 if (ps2_command(ps2dev, NULL, cmd) || 1846 ps2_command(ps2dev, NULL, cmd) || 1847 ps2_command(ps2dev, NULL, cmd) || 1848 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1849 return -1; 1850 1851 /* we may get 3 more bytes, just ignore them */ 1852 ps2_drain(ps2dev, 3, 100); 1853 1854 return 0; 1855 } 1856 1857 static int alps_absolute_mode_v1_v2(struct psmouse *psmouse) 1858 { 1859 struct ps2dev *ps2dev = &psmouse->ps2dev; 1860 1861 /* Try ALPS magic knock - 4 disable before enable */ 1862 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1863 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1864 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1865 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1866 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) 1867 return -1; 1868 1869 /* 1870 * Switch mouse to poll (remote) mode so motion data will not 1871 * get in our way 1872 */ 1873 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL); 1874 } 1875 1876 static int alps_monitor_mode_send_word(struct psmouse *psmouse, u16 word) 1877 { 1878 int i, nibble; 1879 1880 /* 1881 * b0-b11 are valid bits, send sequence is inverse. 1882 * e.g. when word = 0x0123, nibble send sequence is 3, 2, 1 1883 */ 1884 for (i = 0; i <= 8; i += 4) { 1885 nibble = (word >> i) & 0xf; 1886 if (alps_command_mode_send_nibble(psmouse, nibble)) 1887 return -1; 1888 } 1889 1890 return 0; 1891 } 1892 1893 static int alps_monitor_mode_write_reg(struct psmouse *psmouse, 1894 u16 addr, u16 value) 1895 { 1896 struct ps2dev *ps2dev = &psmouse->ps2dev; 1897 1898 /* 0x0A0 is the command to write the word */ 1899 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE) || 1900 alps_monitor_mode_send_word(psmouse, 0x0A0) || 1901 alps_monitor_mode_send_word(psmouse, addr) || 1902 alps_monitor_mode_send_word(psmouse, value) || 1903 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE)) 1904 return -1; 1905 1906 return 0; 1907 } 1908 1909 static int alps_monitor_mode(struct psmouse *psmouse, bool enable) 1910 { 1911 struct ps2dev *ps2dev = &psmouse->ps2dev; 1912 1913 if (enable) { 1914 /* EC E9 F5 F5 E7 E6 E7 E9 to enter monitor mode */ 1915 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 1916 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO) || 1917 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1918 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1919 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1920 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 1921 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1922 ps2_command(ps2dev, NULL, PSMOUSE_CMD_GETINFO)) 1923 return -1; 1924 } else { 1925 /* EC to exit monitor mode */ 1926 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP)) 1927 return -1; 1928 } 1929 1930 return 0; 1931 } 1932 1933 static int alps_absolute_mode_v6(struct psmouse *psmouse) 1934 { 1935 u16 reg_val = 0x181; 1936 int ret; 1937 1938 /* enter monitor mode, to write the register */ 1939 if (alps_monitor_mode(psmouse, true)) 1940 return -1; 1941 1942 ret = alps_monitor_mode_write_reg(psmouse, 0x000, reg_val); 1943 1944 if (alps_monitor_mode(psmouse, false)) 1945 ret = -1; 1946 1947 return ret; 1948 } 1949 1950 static int alps_get_status(struct psmouse *psmouse, char *param) 1951 { 1952 /* Get status: 0xF5 0xF5 0xF5 0xE9 */ 1953 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_DISABLE, param)) 1954 return -1; 1955 1956 return 0; 1957 } 1958 1959 /* 1960 * Turn touchpad tapping on or off. The sequences are: 1961 * 0xE9 0xF5 0xF5 0xF3 0x0A to enable, 1962 * 0xE9 0xF5 0xF5 0xE8 0x00 to disable. 1963 * My guess that 0xE9 (GetInfo) is here as a sync point. 1964 * For models that also have stickpointer (DualPoints) its tapping 1965 * is controlled separately (0xE6 0xE6 0xE6 0xF3 0x14|0x0A) but 1966 * we don't fiddle with it. 1967 */ 1968 static int alps_tap_mode(struct psmouse *psmouse, int enable) 1969 { 1970 struct ps2dev *ps2dev = &psmouse->ps2dev; 1971 int cmd = enable ? PSMOUSE_CMD_SETRATE : PSMOUSE_CMD_SETRES; 1972 unsigned char tap_arg = enable ? 0x0A : 0x00; 1973 unsigned char param[4]; 1974 1975 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO) || 1976 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1977 ps2_command(ps2dev, NULL, PSMOUSE_CMD_DISABLE) || 1978 ps2_command(ps2dev, &tap_arg, cmd)) 1979 return -1; 1980 1981 if (alps_get_status(psmouse, param)) 1982 return -1; 1983 1984 return 0; 1985 } 1986 1987 /* 1988 * alps_poll() - poll the touchpad for current motion packet. 1989 * Used in resync. 1990 */ 1991 static int alps_poll(struct psmouse *psmouse) 1992 { 1993 struct alps_data *priv = psmouse->private; 1994 unsigned char buf[sizeof(psmouse->packet)]; 1995 bool poll_failed; 1996 1997 if (priv->flags & ALPS_PASS) 1998 alps_passthrough_mode_v2(psmouse, true); 1999 2000 poll_failed = ps2_command(&psmouse->ps2dev, buf, 2001 PSMOUSE_CMD_POLL | (psmouse->pktsize << 8)) < 0; 2002 2003 if (priv->flags & ALPS_PASS) 2004 alps_passthrough_mode_v2(psmouse, false); 2005 2006 if (poll_failed || (buf[0] & priv->mask0) != priv->byte0) 2007 return -1; 2008 2009 if ((psmouse->badbyte & 0xc8) == 0x08) { 2010 /* 2011 * Poll the track stick ... 2012 */ 2013 if (ps2_command(&psmouse->ps2dev, buf, PSMOUSE_CMD_POLL | (3 << 8))) 2014 return -1; 2015 } 2016 2017 memcpy(psmouse->packet, buf, sizeof(buf)); 2018 return 0; 2019 } 2020 2021 static int alps_hw_init_v1_v2(struct psmouse *psmouse) 2022 { 2023 struct alps_data *priv = psmouse->private; 2024 2025 if ((priv->flags & ALPS_PASS) && 2026 alps_passthrough_mode_v2(psmouse, true)) { 2027 return -1; 2028 } 2029 2030 if (alps_tap_mode(psmouse, true)) { 2031 psmouse_warn(psmouse, "Failed to enable hardware tapping\n"); 2032 return -1; 2033 } 2034 2035 if (alps_absolute_mode_v1_v2(psmouse)) { 2036 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 2037 return -1; 2038 } 2039 2040 if ((priv->flags & ALPS_PASS) && 2041 alps_passthrough_mode_v2(psmouse, false)) { 2042 return -1; 2043 } 2044 2045 /* ALPS needs stream mode, otherwise it won't report any data */ 2046 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSTREAM)) { 2047 psmouse_err(psmouse, "Failed to enable stream mode\n"); 2048 return -1; 2049 } 2050 2051 return 0; 2052 } 2053 2054 /* Must be in passthrough mode when calling this function */ 2055 static int alps_trackstick_enter_extended_mode_v3_v6(struct psmouse *psmouse) 2056 { 2057 unsigned char param[2] = {0xC8, 0x14}; 2058 2059 if (ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2060 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2061 ps2_command(&psmouse->ps2dev, NULL, PSMOUSE_CMD_SETSCALE11) || 2062 ps2_command(&psmouse->ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2063 ps2_command(&psmouse->ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 2064 return -1; 2065 2066 return 0; 2067 } 2068 2069 static int alps_hw_init_v6(struct psmouse *psmouse) 2070 { 2071 int ret; 2072 2073 /* Enter passthrough mode to let trackpoint enter 6byte raw mode */ 2074 if (alps_passthrough_mode_v2(psmouse, true)) 2075 return -1; 2076 2077 ret = alps_trackstick_enter_extended_mode_v3_v6(psmouse); 2078 2079 if (alps_passthrough_mode_v2(psmouse, false)) 2080 return -1; 2081 2082 if (ret) 2083 return ret; 2084 2085 if (alps_absolute_mode_v6(psmouse)) { 2086 psmouse_err(psmouse, "Failed to enable absolute mode\n"); 2087 return -1; 2088 } 2089 2090 return 0; 2091 } 2092 2093 /* 2094 * Enable or disable passthrough mode to the trackstick. 2095 */ 2096 static int alps_passthrough_mode_v3(struct psmouse *psmouse, 2097 int reg_base, bool enable) 2098 { 2099 int reg_val, ret = -1; 2100 2101 if (alps_enter_command_mode(psmouse)) 2102 return -1; 2103 2104 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x0008); 2105 if (reg_val == -1) 2106 goto error; 2107 2108 if (enable) 2109 reg_val |= 0x01; 2110 else 2111 reg_val &= ~0x01; 2112 2113 ret = __alps_command_mode_write_reg(psmouse, reg_val); 2114 2115 error: 2116 if (alps_exit_command_mode(psmouse)) 2117 ret = -1; 2118 return ret; 2119 } 2120 2121 /* Must be in command mode when calling this function */ 2122 static int alps_absolute_mode_v3(struct psmouse *psmouse) 2123 { 2124 int reg_val; 2125 2126 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 2127 if (reg_val == -1) 2128 return -1; 2129 2130 reg_val |= 0x06; 2131 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2132 return -1; 2133 2134 return 0; 2135 } 2136 2137 static int alps_probe_trackstick_v3_v7(struct psmouse *psmouse, int reg_base) 2138 { 2139 int ret = -EIO, reg_val; 2140 2141 if (alps_enter_command_mode(psmouse)) 2142 goto error; 2143 2144 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08); 2145 if (reg_val == -1) 2146 goto error; 2147 2148 /* bit 7: trackstick is present */ 2149 ret = reg_val & 0x80 ? 0 : -ENODEV; 2150 2151 error: 2152 alps_exit_command_mode(psmouse); 2153 return ret; 2154 } 2155 2156 static int alps_setup_trackstick_v3(struct psmouse *psmouse, int reg_base) 2157 { 2158 int ret = 0; 2159 int reg_val; 2160 unsigned char param[4]; 2161 2162 /* 2163 * We need to configure trackstick to report data for touchpad in 2164 * extended format. And also we need to tell touchpad to expect data 2165 * from trackstick in extended format. Without this configuration 2166 * trackstick packets sent from touchpad are in basic format which is 2167 * different from what we expect. 2168 */ 2169 2170 if (alps_passthrough_mode_v3(psmouse, reg_base, true)) 2171 return -EIO; 2172 2173 /* 2174 * E7 report for the trackstick 2175 * 2176 * There have been reports of failures to seem to trace back 2177 * to the above trackstick check failing. When these occur 2178 * this E7 report fails, so when that happens we continue 2179 * with the assumption that there isn't a trackstick after 2180 * all. 2181 */ 2182 if (alps_rpt_cmd(psmouse, 0, PSMOUSE_CMD_SETSCALE21, param)) { 2183 psmouse_warn(psmouse, "Failed to initialize trackstick (E7 report failed)\n"); 2184 ret = -ENODEV; 2185 } else { 2186 psmouse_dbg(psmouse, "trackstick E7 report: %3ph\n", param); 2187 if (alps_trackstick_enter_extended_mode_v3_v6(psmouse)) { 2188 psmouse_err(psmouse, "Failed to enter into trackstick extended mode\n"); 2189 ret = -EIO; 2190 } 2191 } 2192 2193 if (alps_passthrough_mode_v3(psmouse, reg_base, false)) 2194 return -EIO; 2195 2196 if (ret) 2197 return ret; 2198 2199 if (alps_enter_command_mode(psmouse)) 2200 return -EIO; 2201 2202 reg_val = alps_command_mode_read_reg(psmouse, reg_base + 0x08); 2203 if (reg_val == -1) { 2204 ret = -EIO; 2205 } else { 2206 /* 2207 * Tell touchpad that trackstick is now in extended mode. 2208 * If bit 1 isn't set the packet format is different. 2209 */ 2210 reg_val |= BIT(1); 2211 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2212 ret = -EIO; 2213 } 2214 2215 if (alps_exit_command_mode(psmouse)) 2216 return -EIO; 2217 2218 return ret; 2219 } 2220 2221 static int alps_hw_init_v3(struct psmouse *psmouse) 2222 { 2223 struct alps_data *priv = psmouse->private; 2224 struct ps2dev *ps2dev = &psmouse->ps2dev; 2225 int reg_val; 2226 unsigned char param[4]; 2227 2228 if ((priv->flags & ALPS_DUALPOINT) && 2229 alps_setup_trackstick_v3(psmouse, ALPS_REG_BASE_PINNACLE) == -EIO) 2230 goto error; 2231 2232 if (alps_enter_command_mode(psmouse) || 2233 alps_absolute_mode_v3(psmouse)) { 2234 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2235 goto error; 2236 } 2237 2238 reg_val = alps_command_mode_read_reg(psmouse, 0x0006); 2239 if (reg_val == -1) 2240 goto error; 2241 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2242 goto error; 2243 2244 reg_val = alps_command_mode_read_reg(psmouse, 0x0007); 2245 if (reg_val == -1) 2246 goto error; 2247 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x01)) 2248 goto error; 2249 2250 if (alps_command_mode_read_reg(psmouse, 0x0144) == -1) 2251 goto error; 2252 if (__alps_command_mode_write_reg(psmouse, 0x04)) 2253 goto error; 2254 2255 if (alps_command_mode_read_reg(psmouse, 0x0159) == -1) 2256 goto error; 2257 if (__alps_command_mode_write_reg(psmouse, 0x03)) 2258 goto error; 2259 2260 if (alps_command_mode_read_reg(psmouse, 0x0163) == -1) 2261 goto error; 2262 if (alps_command_mode_write_reg(psmouse, 0x0163, 0x03)) 2263 goto error; 2264 2265 if (alps_command_mode_read_reg(psmouse, 0x0162) == -1) 2266 goto error; 2267 if (alps_command_mode_write_reg(psmouse, 0x0162, 0x04)) 2268 goto error; 2269 2270 alps_exit_command_mode(psmouse); 2271 2272 /* Set rate and enable data reporting */ 2273 param[0] = 0x64; 2274 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2275 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2276 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2277 return -1; 2278 } 2279 2280 return 0; 2281 2282 error: 2283 /* 2284 * Leaving the touchpad in command mode will essentially render 2285 * it unusable until the machine reboots, so exit it here just 2286 * to be safe 2287 */ 2288 alps_exit_command_mode(psmouse); 2289 return -1; 2290 } 2291 2292 static int alps_get_v3_v7_resolution(struct psmouse *psmouse, int reg_pitch) 2293 { 2294 int reg, x_pitch, y_pitch, x_electrode, y_electrode, x_phys, y_phys; 2295 struct alps_data *priv = psmouse->private; 2296 2297 reg = alps_command_mode_read_reg(psmouse, reg_pitch); 2298 if (reg < 0) 2299 return reg; 2300 2301 x_pitch = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2302 x_pitch = 50 + 2 * x_pitch; /* In 0.1 mm units */ 2303 2304 y_pitch = (s8)reg >> 4; /* sign extend upper 4 bits */ 2305 y_pitch = 36 + 2 * y_pitch; /* In 0.1 mm units */ 2306 2307 reg = alps_command_mode_read_reg(psmouse, reg_pitch + 1); 2308 if (reg < 0) 2309 return reg; 2310 2311 x_electrode = (s8)(reg << 4) >> 4; /* sign extend lower 4 bits */ 2312 x_electrode = 17 + x_electrode; 2313 2314 y_electrode = (s8)reg >> 4; /* sign extend upper 4 bits */ 2315 y_electrode = 13 + y_electrode; 2316 2317 x_phys = x_pitch * (x_electrode - 1); /* In 0.1 mm units */ 2318 y_phys = y_pitch * (y_electrode - 1); /* In 0.1 mm units */ 2319 2320 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2321 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2322 2323 psmouse_dbg(psmouse, 2324 "pitch %dx%d num-electrodes %dx%d physical size %dx%d mm res %dx%d\n", 2325 x_pitch, y_pitch, x_electrode, y_electrode, 2326 x_phys / 10, y_phys / 10, priv->x_res, priv->y_res); 2327 2328 return 0; 2329 } 2330 2331 static int alps_hw_init_rushmore_v3(struct psmouse *psmouse) 2332 { 2333 struct alps_data *priv = psmouse->private; 2334 struct ps2dev *ps2dev = &psmouse->ps2dev; 2335 int reg_val, ret = -1; 2336 2337 if (priv->flags & ALPS_DUALPOINT) { 2338 reg_val = alps_setup_trackstick_v3(psmouse, 2339 ALPS_REG_BASE_RUSHMORE); 2340 if (reg_val == -EIO) 2341 goto error; 2342 } 2343 2344 if (alps_enter_command_mode(psmouse) || 2345 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1 || 2346 alps_command_mode_write_reg(psmouse, 0xc2cb, 0x00)) 2347 goto error; 2348 2349 if (alps_get_v3_v7_resolution(psmouse, 0xc2da)) 2350 goto error; 2351 2352 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c6); 2353 if (reg_val == -1) 2354 goto error; 2355 if (__alps_command_mode_write_reg(psmouse, reg_val & 0xfd)) 2356 goto error; 2357 2358 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2359 goto error; 2360 2361 /* enter absolute mode */ 2362 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2363 if (reg_val == -1) 2364 goto error; 2365 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2366 goto error; 2367 2368 alps_exit_command_mode(psmouse); 2369 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2370 2371 error: 2372 alps_exit_command_mode(psmouse); 2373 return ret; 2374 } 2375 2376 /* Must be in command mode when calling this function */ 2377 static int alps_absolute_mode_v4(struct psmouse *psmouse) 2378 { 2379 int reg_val; 2380 2381 reg_val = alps_command_mode_read_reg(psmouse, 0x0004); 2382 if (reg_val == -1) 2383 return -1; 2384 2385 reg_val |= 0x02; 2386 if (__alps_command_mode_write_reg(psmouse, reg_val)) 2387 return -1; 2388 2389 return 0; 2390 } 2391 2392 static int alps_hw_init_v4(struct psmouse *psmouse) 2393 { 2394 struct ps2dev *ps2dev = &psmouse->ps2dev; 2395 unsigned char param[4]; 2396 2397 if (alps_enter_command_mode(psmouse)) 2398 goto error; 2399 2400 if (alps_absolute_mode_v4(psmouse)) { 2401 psmouse_err(psmouse, "Failed to enter absolute mode\n"); 2402 goto error; 2403 } 2404 2405 if (alps_command_mode_write_reg(psmouse, 0x0007, 0x8c)) 2406 goto error; 2407 2408 if (alps_command_mode_write_reg(psmouse, 0x0149, 0x03)) 2409 goto error; 2410 2411 if (alps_command_mode_write_reg(psmouse, 0x0160, 0x03)) 2412 goto error; 2413 2414 if (alps_command_mode_write_reg(psmouse, 0x017f, 0x15)) 2415 goto error; 2416 2417 if (alps_command_mode_write_reg(psmouse, 0x0151, 0x01)) 2418 goto error; 2419 2420 if (alps_command_mode_write_reg(psmouse, 0x0168, 0x03)) 2421 goto error; 2422 2423 if (alps_command_mode_write_reg(psmouse, 0x014a, 0x03)) 2424 goto error; 2425 2426 if (alps_command_mode_write_reg(psmouse, 0x0161, 0x03)) 2427 goto error; 2428 2429 alps_exit_command_mode(psmouse); 2430 2431 /* 2432 * This sequence changes the output from a 9-byte to an 2433 * 8-byte format. All the same data seems to be present, 2434 * just in a more compact format. 2435 */ 2436 param[0] = 0xc8; 2437 param[1] = 0x64; 2438 param[2] = 0x50; 2439 if (ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2440 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE) || 2441 ps2_command(ps2dev, ¶m[2], PSMOUSE_CMD_SETRATE) || 2442 ps2_command(ps2dev, param, PSMOUSE_CMD_GETID)) 2443 return -1; 2444 2445 /* Set rate and enable data reporting */ 2446 param[0] = 0x64; 2447 if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRATE) || 2448 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE)) { 2449 psmouse_err(psmouse, "Failed to enable data reporting\n"); 2450 return -1; 2451 } 2452 2453 return 0; 2454 2455 error: 2456 /* 2457 * Leaving the touchpad in command mode will essentially render 2458 * it unusable until the machine reboots, so exit it here just 2459 * to be safe 2460 */ 2461 alps_exit_command_mode(psmouse); 2462 return -1; 2463 } 2464 2465 static int alps_get_otp_values_ss4_v2(struct psmouse *psmouse, 2466 unsigned char index, unsigned char otp[]) 2467 { 2468 struct ps2dev *ps2dev = &psmouse->ps2dev; 2469 2470 switch (index) { 2471 case 0: 2472 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2473 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2474 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2475 return -1; 2476 2477 break; 2478 2479 case 1: 2480 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2481 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2482 ps2_command(ps2dev, otp, PSMOUSE_CMD_GETINFO)) 2483 return -1; 2484 2485 break; 2486 } 2487 2488 return 0; 2489 } 2490 2491 static int alps_update_device_area_ss4_v2(unsigned char otp[][4], 2492 struct alps_data *priv) 2493 { 2494 int num_x_electrode; 2495 int num_y_electrode; 2496 int x_pitch, y_pitch, x_phys, y_phys; 2497 2498 if (IS_SS4PLUS_DEV(priv->dev_id)) { 2499 num_x_electrode = 2500 SS4PLUS_NUMSENSOR_XOFFSET + (otp[0][2] & 0x0F); 2501 num_y_electrode = 2502 SS4PLUS_NUMSENSOR_YOFFSET + ((otp[0][2] >> 4) & 0x0F); 2503 2504 priv->x_max = 2505 (num_x_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE; 2506 priv->y_max = 2507 (num_y_electrode - 1) * SS4PLUS_COUNT_PER_ELECTRODE; 2508 2509 x_pitch = (otp[0][1] & 0x0F) + SS4PLUS_MIN_PITCH_MM; 2510 y_pitch = ((otp[0][1] >> 4) & 0x0F) + SS4PLUS_MIN_PITCH_MM; 2511 2512 } else { 2513 num_x_electrode = 2514 SS4_NUMSENSOR_XOFFSET + (otp[1][0] & 0x0F); 2515 num_y_electrode = 2516 SS4_NUMSENSOR_YOFFSET + ((otp[1][0] >> 4) & 0x0F); 2517 2518 priv->x_max = 2519 (num_x_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2520 priv->y_max = 2521 (num_y_electrode - 1) * SS4_COUNT_PER_ELECTRODE; 2522 2523 x_pitch = ((otp[1][2] >> 2) & 0x07) + SS4_MIN_PITCH_MM; 2524 y_pitch = ((otp[1][2] >> 5) & 0x07) + SS4_MIN_PITCH_MM; 2525 } 2526 2527 x_phys = x_pitch * (num_x_electrode - 1); /* In 0.1 mm units */ 2528 y_phys = y_pitch * (num_y_electrode - 1); /* In 0.1 mm units */ 2529 2530 priv->x_res = priv->x_max * 10 / x_phys; /* units / mm */ 2531 priv->y_res = priv->y_max * 10 / y_phys; /* units / mm */ 2532 2533 return 0; 2534 } 2535 2536 static int alps_update_btn_info_ss4_v2(unsigned char otp[][4], 2537 struct alps_data *priv) 2538 { 2539 unsigned char is_btnless; 2540 2541 if (IS_SS4PLUS_DEV(priv->dev_id)) 2542 is_btnless = (otp[1][0] >> 1) & 0x01; 2543 else 2544 is_btnless = (otp[1][1] >> 3) & 0x01; 2545 2546 if (is_btnless) 2547 priv->flags |= ALPS_BUTTONPAD; 2548 2549 return 0; 2550 } 2551 2552 static int alps_update_dual_info_ss4_v2(unsigned char otp[][4], 2553 struct alps_data *priv, 2554 struct psmouse *psmouse) 2555 { 2556 bool is_dual = false; 2557 int reg_val = 0; 2558 struct ps2dev *ps2dev = &psmouse->ps2dev; 2559 2560 if (IS_SS4PLUS_DEV(priv->dev_id)) { 2561 is_dual = (otp[0][0] >> 4) & 0x01; 2562 2563 if (!is_dual) { 2564 /* For support TrackStick of Thinkpad L/E series */ 2565 if (alps_exit_command_mode(psmouse) == 0 && 2566 alps_enter_command_mode(psmouse) == 0) { 2567 reg_val = alps_command_mode_read_reg(psmouse, 2568 0xD7); 2569 } 2570 alps_exit_command_mode(psmouse); 2571 ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2572 2573 if (reg_val == 0x0C || reg_val == 0x1D) 2574 is_dual = true; 2575 } 2576 } 2577 2578 if (is_dual) 2579 priv->flags |= ALPS_DUALPOINT | 2580 ALPS_DUALPOINT_WITH_PRESSURE; 2581 2582 return 0; 2583 } 2584 2585 static int alps_set_defaults_ss4_v2(struct psmouse *psmouse, 2586 struct alps_data *priv) 2587 { 2588 unsigned char otp[2][4]; 2589 2590 memset(otp, 0, sizeof(otp)); 2591 2592 if (alps_get_otp_values_ss4_v2(psmouse, 1, &otp[1][0]) || 2593 alps_get_otp_values_ss4_v2(psmouse, 0, &otp[0][0])) 2594 return -1; 2595 2596 alps_update_device_area_ss4_v2(otp, priv); 2597 2598 alps_update_btn_info_ss4_v2(otp, priv); 2599 2600 alps_update_dual_info_ss4_v2(otp, priv, psmouse); 2601 2602 return 0; 2603 } 2604 2605 static int alps_dolphin_get_device_area(struct psmouse *psmouse, 2606 struct alps_data *priv) 2607 { 2608 struct ps2dev *ps2dev = &psmouse->ps2dev; 2609 unsigned char param[4] = {0}; 2610 int num_x_electrode, num_y_electrode; 2611 2612 if (alps_enter_command_mode(psmouse)) 2613 return -1; 2614 2615 param[0] = 0x0a; 2616 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_RESET_WRAP) || 2617 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2618 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETPOLL) || 2619 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2620 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE)) 2621 return -1; 2622 2623 if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) 2624 return -1; 2625 2626 /* 2627 * Dolphin's sensor line number is not fixed. It can be calculated 2628 * by adding the device's register value with DOLPHIN_PROFILE_X/YOFFSET. 2629 * Further more, we can get device's x_max and y_max by multiplying 2630 * sensor line number with DOLPHIN_COUNT_PER_ELECTRODE. 2631 * 2632 * e.g. When we get register's sensor_x = 11 & sensor_y = 8, 2633 * real sensor line number X = 11 + 8 = 19, and 2634 * real sensor line number Y = 8 + 1 = 9. 2635 * So, x_max = (19 - 1) * 64 = 1152, and 2636 * y_max = (9 - 1) * 64 = 512. 2637 */ 2638 num_x_electrode = DOLPHIN_PROFILE_XOFFSET + (param[2] & 0x0F); 2639 num_y_electrode = DOLPHIN_PROFILE_YOFFSET + ((param[2] >> 4) & 0x0F); 2640 priv->x_bits = num_x_electrode; 2641 priv->y_bits = num_y_electrode; 2642 priv->x_max = (num_x_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2643 priv->y_max = (num_y_electrode - 1) * DOLPHIN_COUNT_PER_ELECTRODE; 2644 2645 if (alps_exit_command_mode(psmouse)) 2646 return -1; 2647 2648 return 0; 2649 } 2650 2651 static int alps_hw_init_dolphin_v1(struct psmouse *psmouse) 2652 { 2653 struct ps2dev *ps2dev = &psmouse->ps2dev; 2654 unsigned char param[2]; 2655 2656 /* This is dolphin "v1" as empirically defined by florin9doi */ 2657 param[0] = 0x64; 2658 param[1] = 0x28; 2659 2660 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2661 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2662 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) 2663 return -1; 2664 2665 return 0; 2666 } 2667 2668 static int alps_hw_init_v7(struct psmouse *psmouse) 2669 { 2670 struct ps2dev *ps2dev = &psmouse->ps2dev; 2671 int reg_val, ret = -1; 2672 2673 if (alps_enter_command_mode(psmouse) || 2674 alps_command_mode_read_reg(psmouse, 0xc2d9) == -1) 2675 goto error; 2676 2677 if (alps_get_v3_v7_resolution(psmouse, 0xc397)) 2678 goto error; 2679 2680 if (alps_command_mode_write_reg(psmouse, 0xc2c9, 0x64)) 2681 goto error; 2682 2683 reg_val = alps_command_mode_read_reg(psmouse, 0xc2c4); 2684 if (reg_val == -1) 2685 goto error; 2686 if (__alps_command_mode_write_reg(psmouse, reg_val | 0x02)) 2687 goto error; 2688 2689 alps_exit_command_mode(psmouse); 2690 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2691 2692 error: 2693 alps_exit_command_mode(psmouse); 2694 return ret; 2695 } 2696 2697 static int alps_hw_init_ss4_v2(struct psmouse *psmouse) 2698 { 2699 struct ps2dev *ps2dev = &psmouse->ps2dev; 2700 char param[2] = {0x64, 0x28}; 2701 int ret = -1; 2702 2703 /* enter absolute mode */ 2704 if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2705 ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSTREAM) || 2706 ps2_command(ps2dev, ¶m[0], PSMOUSE_CMD_SETRATE) || 2707 ps2_command(ps2dev, ¶m[1], PSMOUSE_CMD_SETRATE)) { 2708 goto error; 2709 } 2710 2711 /* T.B.D. Decread noise packet number, delete in the future */ 2712 if (alps_exit_command_mode(psmouse) || 2713 alps_enter_command_mode(psmouse) || 2714 alps_command_mode_write_reg(psmouse, 0x001D, 0x20)) { 2715 goto error; 2716 } 2717 alps_exit_command_mode(psmouse); 2718 2719 return ps2_command(ps2dev, NULL, PSMOUSE_CMD_ENABLE); 2720 2721 error: 2722 alps_exit_command_mode(psmouse); 2723 return ret; 2724 } 2725 2726 static int alps_set_protocol(struct psmouse *psmouse, 2727 struct alps_data *priv, 2728 const struct alps_protocol_info *protocol) 2729 { 2730 psmouse->private = priv; 2731 2732 timer_setup(&priv->timer, alps_flush_packet, 0); 2733 2734 priv->proto_version = protocol->version; 2735 priv->byte0 = protocol->byte0; 2736 priv->mask0 = protocol->mask0; 2737 priv->flags = protocol->flags; 2738 2739 priv->x_max = 2000; 2740 priv->y_max = 1400; 2741 priv->x_bits = 15; 2742 priv->y_bits = 11; 2743 2744 switch (priv->proto_version) { 2745 case ALPS_PROTO_V1: 2746 case ALPS_PROTO_V2: 2747 priv->hw_init = alps_hw_init_v1_v2; 2748 priv->process_packet = alps_process_packet_v1_v2; 2749 priv->set_abs_params = alps_set_abs_params_st; 2750 priv->x_max = 1023; 2751 priv->y_max = 767; 2752 if (dmi_check_system(alps_dmi_has_separate_stick_buttons)) 2753 priv->flags |= ALPS_STICK_BITS; 2754 break; 2755 2756 case ALPS_PROTO_V3: 2757 priv->hw_init = alps_hw_init_v3; 2758 priv->process_packet = alps_process_packet_v3; 2759 priv->set_abs_params = alps_set_abs_params_semi_mt; 2760 priv->decode_fields = alps_decode_pinnacle; 2761 priv->nibble_commands = alps_v3_nibble_commands; 2762 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2763 2764 if (alps_probe_trackstick_v3_v7(psmouse, 2765 ALPS_REG_BASE_PINNACLE) < 0) 2766 priv->flags &= ~ALPS_DUALPOINT; 2767 2768 break; 2769 2770 case ALPS_PROTO_V3_RUSHMORE: 2771 priv->hw_init = alps_hw_init_rushmore_v3; 2772 priv->process_packet = alps_process_packet_v3; 2773 priv->set_abs_params = alps_set_abs_params_semi_mt; 2774 priv->decode_fields = alps_decode_rushmore; 2775 priv->nibble_commands = alps_v3_nibble_commands; 2776 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2777 priv->x_bits = 16; 2778 priv->y_bits = 12; 2779 2780 if (alps_probe_trackstick_v3_v7(psmouse, 2781 ALPS_REG_BASE_RUSHMORE) < 0) 2782 priv->flags &= ~ALPS_DUALPOINT; 2783 2784 break; 2785 2786 case ALPS_PROTO_V4: 2787 priv->hw_init = alps_hw_init_v4; 2788 priv->process_packet = alps_process_packet_v4; 2789 priv->set_abs_params = alps_set_abs_params_semi_mt; 2790 priv->nibble_commands = alps_v4_nibble_commands; 2791 priv->addr_command = PSMOUSE_CMD_DISABLE; 2792 break; 2793 2794 case ALPS_PROTO_V5: 2795 priv->hw_init = alps_hw_init_dolphin_v1; 2796 priv->process_packet = alps_process_touchpad_packet_v3_v5; 2797 priv->decode_fields = alps_decode_dolphin; 2798 priv->set_abs_params = alps_set_abs_params_semi_mt; 2799 priv->nibble_commands = alps_v3_nibble_commands; 2800 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2801 priv->x_bits = 23; 2802 priv->y_bits = 12; 2803 2804 if (alps_dolphin_get_device_area(psmouse, priv)) 2805 return -EIO; 2806 2807 break; 2808 2809 case ALPS_PROTO_V6: 2810 priv->hw_init = alps_hw_init_v6; 2811 priv->process_packet = alps_process_packet_v6; 2812 priv->set_abs_params = alps_set_abs_params_st; 2813 priv->nibble_commands = alps_v6_nibble_commands; 2814 priv->x_max = 2047; 2815 priv->y_max = 1535; 2816 break; 2817 2818 case ALPS_PROTO_V7: 2819 priv->hw_init = alps_hw_init_v7; 2820 priv->process_packet = alps_process_packet_v7; 2821 priv->decode_fields = alps_decode_packet_v7; 2822 priv->set_abs_params = alps_set_abs_params_v7; 2823 priv->nibble_commands = alps_v3_nibble_commands; 2824 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2825 priv->x_max = 0xfff; 2826 priv->y_max = 0x7ff; 2827 2828 if (priv->fw_ver[1] != 0xba) 2829 priv->flags |= ALPS_BUTTONPAD; 2830 2831 if (alps_probe_trackstick_v3_v7(psmouse, ALPS_REG_BASE_V7) < 0) 2832 priv->flags &= ~ALPS_DUALPOINT; 2833 2834 break; 2835 2836 case ALPS_PROTO_V8: 2837 priv->hw_init = alps_hw_init_ss4_v2; 2838 priv->process_packet = alps_process_packet_ss4_v2; 2839 priv->decode_fields = alps_decode_ss4_v2; 2840 priv->set_abs_params = alps_set_abs_params_ss4_v2; 2841 priv->nibble_commands = alps_v3_nibble_commands; 2842 priv->addr_command = PSMOUSE_CMD_RESET_WRAP; 2843 2844 if (alps_set_defaults_ss4_v2(psmouse, priv)) 2845 return -EIO; 2846 2847 break; 2848 } 2849 2850 return 0; 2851 } 2852 2853 static const struct alps_protocol_info *alps_match_table(unsigned char *e7, 2854 unsigned char *ec) 2855 { 2856 const struct alps_model_info *model; 2857 int i; 2858 2859 for (i = 0; i < ARRAY_SIZE(alps_model_data); i++) { 2860 model = &alps_model_data[i]; 2861 2862 if (!memcmp(e7, model->signature, sizeof(model->signature))) 2863 return &model->protocol_info; 2864 } 2865 2866 return NULL; 2867 } 2868 2869 static bool alps_is_cs19_trackpoint(struct psmouse *psmouse) 2870 { 2871 u8 param[2] = { 0 }; 2872 2873 if (ps2_command(&psmouse->ps2dev, 2874 param, MAKE_PS2_CMD(0, 2, TP_READ_ID))) 2875 return false; 2876 2877 /* 2878 * param[0] contains the trackpoint device variant_id while 2879 * param[1] contains the firmware_id. So far all alps 2880 * trackpoint-only devices have their variant_ids equal 2881 * TP_VARIANT_ALPS and their firmware_ids are in 0x20~0x2f range. 2882 */ 2883 return param[0] == TP_VARIANT_ALPS && ((param[1] & 0xf0) == 0x20); 2884 } 2885 2886 static int alps_identify(struct psmouse *psmouse, struct alps_data *priv) 2887 { 2888 const struct alps_protocol_info *protocol; 2889 unsigned char e6[4], e7[4], ec[4]; 2890 int error; 2891 2892 /* 2893 * First try "E6 report". 2894 * ALPS should return 0,0,10 or 0,0,100 if no buttons are pressed. 2895 * The bits 0-2 of the first byte will be 1s if some buttons are 2896 * pressed. 2897 */ 2898 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2899 PSMOUSE_CMD_SETSCALE11, e6)) 2900 return -EIO; 2901 2902 if ((e6[0] & 0xf8) != 0 || e6[1] != 0 || (e6[2] != 10 && e6[2] != 100)) 2903 return -EINVAL; 2904 2905 /* 2906 * Now get the "E7" and "EC" reports. These will uniquely identify 2907 * most ALPS touchpads. 2908 */ 2909 if (alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2910 PSMOUSE_CMD_SETSCALE21, e7) || 2911 alps_rpt_cmd(psmouse, PSMOUSE_CMD_SETRES, 2912 PSMOUSE_CMD_RESET_WRAP, ec) || 2913 alps_exit_command_mode(psmouse)) 2914 return -EIO; 2915 2916 protocol = alps_match_table(e7, ec); 2917 if (!protocol) { 2918 if (e7[0] == 0x73 && e7[1] == 0x02 && e7[2] == 0x64 && 2919 ec[2] == 0x8a) { 2920 protocol = &alps_v4_protocol_data; 2921 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0x50 && 2922 ec[0] == 0x73 && (ec[1] == 0x01 || ec[1] == 0x02)) { 2923 protocol = &alps_v5_protocol_data; 2924 } else if (ec[0] == 0x88 && 2925 ((ec[1] & 0xf0) == 0xb0 || (ec[1] & 0xf0) == 0xc0)) { 2926 protocol = &alps_v7_protocol_data; 2927 } else if (ec[0] == 0x88 && ec[1] == 0x08) { 2928 protocol = &alps_v3_rushmore_data; 2929 } else if (ec[0] == 0x88 && ec[1] == 0x07 && 2930 ec[2] >= 0x90 && ec[2] <= 0x9d) { 2931 protocol = &alps_v3_protocol_data; 2932 } else if (e7[0] == 0x73 && e7[1] == 0x03 && 2933 (e7[2] == 0x14 || e7[2] == 0x28)) { 2934 protocol = &alps_v8_protocol_data; 2935 } else if (e7[0] == 0x73 && e7[1] == 0x03 && e7[2] == 0xc8) { 2936 protocol = &alps_v9_protocol_data; 2937 psmouse_warn(psmouse, 2938 "Unsupported ALPS V9 touchpad: E7=%3ph, EC=%3ph\n", 2939 e7, ec); 2940 return -EINVAL; 2941 } else { 2942 psmouse_dbg(psmouse, 2943 "Likely not an ALPS touchpad: E7=%3ph, EC=%3ph\n", e7, ec); 2944 return -EINVAL; 2945 } 2946 } 2947 2948 if (priv) { 2949 /* Save Device ID and Firmware version */ 2950 memcpy(priv->dev_id, e7, 3); 2951 memcpy(priv->fw_ver, ec, 3); 2952 error = alps_set_protocol(psmouse, priv, protocol); 2953 if (error) 2954 return error; 2955 } 2956 2957 return 0; 2958 } 2959 2960 static int alps_reconnect(struct psmouse *psmouse) 2961 { 2962 struct alps_data *priv = psmouse->private; 2963 2964 psmouse_reset(psmouse); 2965 2966 if (alps_identify(psmouse, priv) < 0) 2967 return -1; 2968 2969 return priv->hw_init(psmouse); 2970 } 2971 2972 static void alps_disconnect(struct psmouse *psmouse) 2973 { 2974 struct alps_data *priv = psmouse->private; 2975 2976 psmouse_reset(psmouse); 2977 timer_shutdown_sync(&priv->timer); 2978 disable_work_sync(&priv->dev3_register_work); 2979 if (priv->dev2) 2980 input_unregister_device(priv->dev2); 2981 if (!IS_ERR_OR_NULL(priv->dev3)) 2982 input_unregister_device(priv->dev3); 2983 kfree(priv); 2984 } 2985 2986 static void alps_set_abs_params_st(struct alps_data *priv, 2987 struct input_dev *dev1) 2988 { 2989 input_set_abs_params(dev1, ABS_X, 0, priv->x_max, 0, 0); 2990 input_set_abs_params(dev1, ABS_Y, 0, priv->y_max, 0, 0); 2991 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 2992 } 2993 2994 static void alps_set_abs_params_mt_common(struct alps_data *priv, 2995 struct input_dev *dev1) 2996 { 2997 input_set_abs_params(dev1, ABS_MT_POSITION_X, 0, priv->x_max, 0, 0); 2998 input_set_abs_params(dev1, ABS_MT_POSITION_Y, 0, priv->y_max, 0, 0); 2999 3000 input_abs_set_res(dev1, ABS_MT_POSITION_X, priv->x_res); 3001 input_abs_set_res(dev1, ABS_MT_POSITION_Y, priv->y_res); 3002 3003 set_bit(BTN_TOOL_TRIPLETAP, dev1->keybit); 3004 set_bit(BTN_TOOL_QUADTAP, dev1->keybit); 3005 } 3006 3007 static void alps_set_abs_params_semi_mt(struct alps_data *priv, 3008 struct input_dev *dev1) 3009 { 3010 alps_set_abs_params_mt_common(priv, dev1); 3011 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 3012 3013 input_mt_init_slots(dev1, MAX_TOUCHES, 3014 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 3015 INPUT_MT_SEMI_MT); 3016 } 3017 3018 static void alps_set_abs_params_v7(struct alps_data *priv, 3019 struct input_dev *dev1) 3020 { 3021 alps_set_abs_params_mt_common(priv, dev1); 3022 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 3023 3024 input_mt_init_slots(dev1, MAX_TOUCHES, 3025 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 3026 INPUT_MT_TRACK); 3027 3028 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 3029 } 3030 3031 static void alps_set_abs_params_ss4_v2(struct alps_data *priv, 3032 struct input_dev *dev1) 3033 { 3034 alps_set_abs_params_mt_common(priv, dev1); 3035 input_set_abs_params(dev1, ABS_PRESSURE, 0, 127, 0, 0); 3036 set_bit(BTN_TOOL_QUINTTAP, dev1->keybit); 3037 3038 input_mt_init_slots(dev1, MAX_TOUCHES, 3039 INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED | 3040 INPUT_MT_TRACK); 3041 } 3042 3043 int alps_init(struct psmouse *psmouse) 3044 { 3045 struct alps_data *priv = psmouse->private; 3046 struct input_dev *dev1 = psmouse->dev; 3047 int error; 3048 3049 error = priv->hw_init(psmouse); 3050 if (error) 3051 goto init_fail; 3052 3053 /* 3054 * Undo part of setup done for us by psmouse core since touchpad 3055 * is not a relative device. 3056 */ 3057 __clear_bit(EV_REL, dev1->evbit); 3058 __clear_bit(REL_X, dev1->relbit); 3059 __clear_bit(REL_Y, dev1->relbit); 3060 3061 /* 3062 * Now set up our capabilities. 3063 */ 3064 dev1->evbit[BIT_WORD(EV_KEY)] |= BIT_MASK(EV_KEY); 3065 dev1->keybit[BIT_WORD(BTN_TOUCH)] |= BIT_MASK(BTN_TOUCH); 3066 dev1->keybit[BIT_WORD(BTN_TOOL_FINGER)] |= BIT_MASK(BTN_TOOL_FINGER); 3067 dev1->keybit[BIT_WORD(BTN_LEFT)] |= 3068 BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT); 3069 3070 dev1->evbit[BIT_WORD(EV_ABS)] |= BIT_MASK(EV_ABS); 3071 3072 priv->set_abs_params(priv, dev1); 3073 3074 if (priv->flags & ALPS_WHEEL) { 3075 dev1->evbit[BIT_WORD(EV_REL)] |= BIT_MASK(EV_REL); 3076 dev1->relbit[BIT_WORD(REL_WHEEL)] |= BIT_MASK(REL_WHEEL); 3077 } 3078 3079 if (priv->flags & (ALPS_FW_BK_1 | ALPS_FW_BK_2)) { 3080 dev1->keybit[BIT_WORD(BTN_FORWARD)] |= BIT_MASK(BTN_FORWARD); 3081 dev1->keybit[BIT_WORD(BTN_BACK)] |= BIT_MASK(BTN_BACK); 3082 } 3083 3084 if (priv->flags & ALPS_FOUR_BUTTONS) { 3085 dev1->keybit[BIT_WORD(BTN_0)] |= BIT_MASK(BTN_0); 3086 dev1->keybit[BIT_WORD(BTN_1)] |= BIT_MASK(BTN_1); 3087 dev1->keybit[BIT_WORD(BTN_2)] |= BIT_MASK(BTN_2); 3088 dev1->keybit[BIT_WORD(BTN_3)] |= BIT_MASK(BTN_3); 3089 } else if (priv->flags & ALPS_BUTTONPAD) { 3090 set_bit(INPUT_PROP_BUTTONPAD, dev1->propbit); 3091 clear_bit(BTN_RIGHT, dev1->keybit); 3092 } else { 3093 dev1->keybit[BIT_WORD(BTN_MIDDLE)] |= BIT_MASK(BTN_MIDDLE); 3094 } 3095 3096 if (priv->flags & ALPS_DUALPOINT) { 3097 struct input_dev *dev2; 3098 3099 dev2 = input_allocate_device(); 3100 if (!dev2) { 3101 psmouse_err(psmouse, 3102 "failed to allocate trackstick device\n"); 3103 error = -ENOMEM; 3104 goto init_fail; 3105 } 3106 3107 scnprintf(priv->phys2, sizeof(priv->phys2), "%s/input1", 3108 psmouse->ps2dev.serio->phys); 3109 dev2->phys = priv->phys2; 3110 3111 /* 3112 * format of input device name is: "protocol vendor name" 3113 * see function psmouse_switch_protocol() in psmouse-base.c 3114 */ 3115 dev2->name = "AlpsPS/2 ALPS DualPoint Stick"; 3116 3117 dev2->id.bustype = BUS_I8042; 3118 dev2->id.vendor = 0x0002; 3119 dev2->id.product = PSMOUSE_ALPS; 3120 dev2->id.version = priv->proto_version; 3121 dev2->dev.parent = &psmouse->ps2dev.serio->dev; 3122 3123 input_set_capability(dev2, EV_REL, REL_X); 3124 input_set_capability(dev2, EV_REL, REL_Y); 3125 if (priv->flags & ALPS_DUALPOINT_WITH_PRESSURE) { 3126 input_set_capability(dev2, EV_ABS, ABS_PRESSURE); 3127 input_set_abs_params(dev2, ABS_PRESSURE, 0, 127, 0, 0); 3128 } 3129 input_set_capability(dev2, EV_KEY, BTN_LEFT); 3130 input_set_capability(dev2, EV_KEY, BTN_RIGHT); 3131 input_set_capability(dev2, EV_KEY, BTN_MIDDLE); 3132 3133 __set_bit(INPUT_PROP_POINTER, dev2->propbit); 3134 __set_bit(INPUT_PROP_POINTING_STICK, dev2->propbit); 3135 3136 error = input_register_device(dev2); 3137 if (error) { 3138 psmouse_err(psmouse, 3139 "failed to register trackstick device: %d\n", 3140 error); 3141 input_free_device(dev2); 3142 goto init_fail; 3143 } 3144 3145 priv->dev2 = dev2; 3146 } 3147 3148 priv->psmouse = psmouse; 3149 3150 INIT_WORK(&priv->dev3_register_work, alps_register_bare_ps2_mouse); 3151 3152 psmouse->protocol_handler = alps_process_byte; 3153 psmouse->poll = alps_poll; 3154 psmouse->disconnect = alps_disconnect; 3155 psmouse->reconnect = alps_reconnect; 3156 psmouse->pktsize = priv->proto_version == ALPS_PROTO_V4 ? 8 : 6; 3157 3158 /* We are having trouble resyncing ALPS touchpads so disable it for now */ 3159 psmouse->resync_time = 0; 3160 3161 /* Allow 2 invalid packets without resetting device */ 3162 psmouse->resetafter = psmouse->pktsize * 2; 3163 3164 return 0; 3165 3166 init_fail: 3167 psmouse_reset(psmouse); 3168 /* 3169 * Even though we did not allocate psmouse->private we do free 3170 * it here. 3171 */ 3172 kfree(psmouse->private); 3173 psmouse->private = NULL; 3174 return error; 3175 } 3176 3177 int alps_detect(struct psmouse *psmouse, bool set_properties) 3178 { 3179 struct alps_data *priv; 3180 int error; 3181 3182 error = alps_identify(psmouse, NULL); 3183 if (error) 3184 return error; 3185 3186 /* 3187 * ALPS cs19 is a trackpoint-only device, and uses different 3188 * protocol than DualPoint ones, so we return -EINVAL here and let 3189 * trackpoint.c drive this device. If the trackpoint driver is not 3190 * enabled, the device will fall back to a bare PS/2 mouse. 3191 * If ps2_command() fails here, we depend on the immediately 3192 * followed psmouse_reset() to reset the device to normal state. 3193 */ 3194 if (alps_is_cs19_trackpoint(psmouse)) { 3195 psmouse_dbg(psmouse, 3196 "ALPS CS19 trackpoint-only device detected, ignoring\n"); 3197 return -EINVAL; 3198 } 3199 3200 /* 3201 * Reset the device to make sure it is fully operational: 3202 * on some laptops, like certain Dell Latitudes, we may 3203 * fail to properly detect presence of trackstick if device 3204 * has not been reset. 3205 */ 3206 psmouse_reset(psmouse); 3207 3208 priv = kzalloc_obj(*priv); 3209 if (!priv) 3210 return -ENOMEM; 3211 3212 error = alps_identify(psmouse, priv); 3213 if (error) { 3214 kfree(priv); 3215 return error; 3216 } 3217 3218 if (set_properties) { 3219 psmouse->vendor = "ALPS"; 3220 psmouse->name = priv->flags & ALPS_DUALPOINT ? 3221 "DualPoint TouchPad" : "GlidePoint"; 3222 psmouse->model = priv->proto_version; 3223 } else { 3224 /* 3225 * Destroy alps_data structure we allocated earlier since 3226 * this was just a "trial run". Otherwise we'll keep it 3227 * to be used by alps_init() which has to be called if 3228 * we succeed and set_properties is true. 3229 */ 3230 kfree(priv); 3231 psmouse->private = NULL; 3232 } 3233 3234 return 0; 3235 } 3236 3237