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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 | // SPDX-License-Identifier: GPL-2.0-only /* * BYD TouchPad PS/2 mouse driver * * Copyright (C) 2015 Chris Diamand <chris@diamand.org> * Copyright (C) 2015 Richard Pospesel * Copyright (C) 2015 Tai Chi Minh Ralph Eastwood * Copyright (C) 2015 Martin Wimpress * Copyright (C) 2015 Jay Kuri */ #include <linux/delay.h> #include <linux/input.h> #include <linux/libps2.h> #include <linux/serio.h> #include <linux/slab.h> #include "psmouse.h" #include "byd.h" /* PS2 Bits */ #define PS2_Y_OVERFLOW BIT_MASK(7) #define PS2_X_OVERFLOW BIT_MASK(6) #define PS2_Y_SIGN BIT_MASK(5) #define PS2_X_SIGN BIT_MASK(4) #define PS2_ALWAYS_1 BIT_MASK(3) #define PS2_MIDDLE BIT_MASK(2) #define PS2_RIGHT BIT_MASK(1) #define PS2_LEFT BIT_MASK(0) /* * BYD pad constants */ /* * True device resolution is unknown, however experiments show the * resolution is about 111 units/mm. * Absolute coordinate packets are in the range 0-255 for both X and Y * we pick ABS_X/ABS_Y dimensions which are multiples of 256 and in * the right ballpark given the touchpad's physical dimensions and estimate * resolution per spec sheet, device active area dimensions are * 101.6 x 60.1 mm. */ #define BYD_PAD_WIDTH 11264 #define BYD_PAD_HEIGHT 6656 #define BYD_PAD_RESOLUTION 111 /* * Given the above dimensions, relative packets velocity is in multiples of * 1 unit / 11 milliseconds. We use this dt to estimate distance traveled */ #define BYD_DT 11 /* Time in jiffies used to timeout various touch events (64 ms) */ #define BYD_TOUCH_TIMEOUT msecs_to_jiffies(64) /* BYD commands reverse engineered from windows driver */ /* * Swipe gesture from off-pad to on-pad * 0 : disable * 1 : enable */ #define BYD_CMD_SET_OFFSCREEN_SWIPE 0x10cc /* * Tap and drag delay time * 0 : disable * 1 - 8 : least to most delay */ #define BYD_CMD_SET_TAP_DRAG_DELAY_TIME 0x10cf /* * Physical buttons function mapping * 0 : enable * 4 : normal * 5 : left button custom command * 6 : right button custom command * 8 : disable */ #define BYD_CMD_SET_PHYSICAL_BUTTONS 0x10d0 /* * Absolute mode (1 byte X/Y resolution) * 0 : disable * 2 : enable */ #define BYD_CMD_SET_ABSOLUTE_MODE 0x10d1 /* * Two finger scrolling * 1 : vertical * 2 : horizontal * 3 : vertical + horizontal * 4 : disable */ #define BYD_CMD_SET_TWO_FINGER_SCROLL 0x10d2 /* * Handedness * 1 : right handed * 2 : left handed */ #define BYD_CMD_SET_HANDEDNESS 0x10d3 /* * Tap to click * 1 : enable * 2 : disable */ #define BYD_CMD_SET_TAP 0x10d4 /* * Tap and drag * 1 : tap and hold to drag * 2 : tap and hold to drag + lock * 3 : disable */ #define BYD_CMD_SET_TAP_DRAG 0x10d5 /* * Touch sensitivity * 1 - 7 : least to most sensitive */ #define BYD_CMD_SET_TOUCH_SENSITIVITY 0x10d6 /* * One finger scrolling * 1 : vertical * 2 : horizontal * 3 : vertical + horizontal * 4 : disable */ #define BYD_CMD_SET_ONE_FINGER_SCROLL 0x10d7 /* * One finger scrolling function * 1 : free scrolling * 2 : edge motion * 3 : free scrolling + edge motion * 4 : disable */ #define BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC 0x10d8 /* * Sliding speed * 1 - 5 : slowest to fastest */ #define BYD_CMD_SET_SLIDING_SPEED 0x10da /* * Edge motion * 1 : disable * 2 : enable when dragging * 3 : enable when dragging and pointing */ #define BYD_CMD_SET_EDGE_MOTION 0x10db /* * Left edge region size * 0 - 7 : smallest to largest width */ #define BYD_CMD_SET_LEFT_EDGE_REGION 0x10dc /* * Top edge region size * 0 - 9 : smallest to largest height */ #define BYD_CMD_SET_TOP_EDGE_REGION 0x10dd /* * Disregard palm press as clicks * 1 - 6 : smallest to largest */ #define BYD_CMD_SET_PALM_CHECK 0x10de /* * Right edge region size * 0 - 7 : smallest to largest width */ #define BYD_CMD_SET_RIGHT_EDGE_REGION 0x10df /* * Bottom edge region size * 0 - 9 : smallest to largest height */ #define BYD_CMD_SET_BOTTOM_EDGE_REGION 0x10e1 /* * Multitouch gestures * 1 : enable * 2 : disable */ #define BYD_CMD_SET_MULTITOUCH 0x10e3 /* * Edge motion speed * 0 : control with finger pressure * 1 - 9 : slowest to fastest */ #define BYD_CMD_SET_EDGE_MOTION_SPEED 0x10e4 /* * Two finger scolling function * 0 : free scrolling * 1 : free scrolling (with momentum) * 2 : edge motion * 3 : free scrolling (with momentum) + edge motion * 4 : disable */ #define BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC 0x10e5 /* * The touchpad generates a mixture of absolute and relative packets, indicated * by the the last byte of each packet being set to one of the following: */ #define BYD_PACKET_ABSOLUTE 0xf8 #define BYD_PACKET_RELATIVE 0x00 /* Multitouch gesture packets */ #define BYD_PACKET_PINCH_IN 0xd8 #define BYD_PACKET_PINCH_OUT 0x28 #define BYD_PACKET_ROTATE_CLOCKWISE 0x29 #define BYD_PACKET_ROTATE_ANTICLOCKWISE 0xd7 #define BYD_PACKET_TWO_FINGER_SCROLL_RIGHT 0x2a #define BYD_PACKET_TWO_FINGER_SCROLL_DOWN 0x2b #define BYD_PACKET_TWO_FINGER_SCROLL_UP 0xd5 #define BYD_PACKET_TWO_FINGER_SCROLL_LEFT 0xd6 #define BYD_PACKET_THREE_FINGER_SWIPE_RIGHT 0x2c #define BYD_PACKET_THREE_FINGER_SWIPE_DOWN 0x2d #define BYD_PACKET_THREE_FINGER_SWIPE_UP 0xd3 #define BYD_PACKET_THREE_FINGER_SWIPE_LEFT 0xd4 #define BYD_PACKET_FOUR_FINGER_DOWN 0x33 #define BYD_PACKET_FOUR_FINGER_UP 0xcd #define BYD_PACKET_REGION_SCROLL_RIGHT 0x35 #define BYD_PACKET_REGION_SCROLL_DOWN 0x36 #define BYD_PACKET_REGION_SCROLL_UP 0xca #define BYD_PACKET_REGION_SCROLL_LEFT 0xcb #define BYD_PACKET_RIGHT_CORNER_CLICK 0xd2 #define BYD_PACKET_LEFT_CORNER_CLICK 0x2e #define BYD_PACKET_LEFT_AND_RIGHT_CORNER_CLICK 0x2f #define BYD_PACKET_ONTO_PAD_SWIPE_RIGHT 0x37 #define BYD_PACKET_ONTO_PAD_SWIPE_DOWN 0x30 #define BYD_PACKET_ONTO_PAD_SWIPE_UP 0xd0 #define BYD_PACKET_ONTO_PAD_SWIPE_LEFT 0xc9 struct byd_data { struct timer_list timer; struct psmouse *psmouse; s32 abs_x; s32 abs_y; typeof(jiffies) last_touch_time; bool btn_left; bool btn_right; bool touch; }; static void byd_report_input(struct psmouse *psmouse) { struct byd_data *priv = psmouse->private; struct input_dev *dev = psmouse->dev; input_report_key(dev, BTN_TOUCH, priv->touch); input_report_key(dev, BTN_TOOL_FINGER, priv->touch); input_report_abs(dev, ABS_X, priv->abs_x); input_report_abs(dev, ABS_Y, priv->abs_y); input_report_key(dev, BTN_LEFT, priv->btn_left); input_report_key(dev, BTN_RIGHT, priv->btn_right); input_sync(dev); } static void byd_clear_touch(struct timer_list *t) { struct byd_data *priv = from_timer(priv, t, timer); struct psmouse *psmouse = priv->psmouse; serio_pause_rx(psmouse->ps2dev.serio); priv->touch = false; byd_report_input(psmouse); serio_continue_rx(psmouse->ps2dev.serio); /* * Move cursor back to center of pad when we lose touch - this * specifically improves user experience when moving cursor with one * finger, and pressing a button with another. */ priv->abs_x = BYD_PAD_WIDTH / 2; priv->abs_y = BYD_PAD_HEIGHT / 2; } static psmouse_ret_t byd_process_byte(struct psmouse *psmouse) { struct byd_data *priv = psmouse->private; u8 *pkt = psmouse->packet; if (psmouse->pktcnt > 0 && !(pkt[0] & PS2_ALWAYS_1)) { psmouse_warn(psmouse, "Always_1 bit not 1. pkt[0] = %02x\n", pkt[0]); return PSMOUSE_BAD_DATA; } if (psmouse->pktcnt < psmouse->pktsize) return PSMOUSE_GOOD_DATA; /* Otherwise, a full packet has been received */ switch (pkt[3]) { case BYD_PACKET_ABSOLUTE: /* Only use absolute packets for the start of movement. */ if (!priv->touch) { /* needed to detect tap */ typeof(jiffies) tap_time = priv->last_touch_time + BYD_TOUCH_TIMEOUT; priv->touch = time_after(jiffies, tap_time); /* init abs position */ priv->abs_x = pkt[1] * (BYD_PAD_WIDTH / 256); priv->abs_y = (255 - pkt[2]) * (BYD_PAD_HEIGHT / 256); } break; case BYD_PACKET_RELATIVE: { /* Standard packet */ /* Sign-extend if a sign bit is set. */ u32 signx = pkt[0] & PS2_X_SIGN ? ~0xFF : 0; u32 signy = pkt[0] & PS2_Y_SIGN ? ~0xFF : 0; s32 dx = signx | (int) pkt[1]; s32 dy = signy | (int) pkt[2]; /* Update position based on velocity */ priv->abs_x += dx * BYD_DT; priv->abs_y -= dy * BYD_DT; priv->touch = true; break; } default: psmouse_warn(psmouse, "Unrecognized Z: pkt = %02x %02x %02x %02x\n", psmouse->packet[0], psmouse->packet[1], psmouse->packet[2], psmouse->packet[3]); return PSMOUSE_BAD_DATA; } priv->btn_left = pkt[0] & PS2_LEFT; priv->btn_right = pkt[0] & PS2_RIGHT; byd_report_input(psmouse); /* Reset time since last touch. */ if (priv->touch) { priv->last_touch_time = jiffies; mod_timer(&priv->timer, jiffies + BYD_TOUCH_TIMEOUT); } return PSMOUSE_FULL_PACKET; } static int byd_reset_touchpad(struct psmouse *psmouse) { struct ps2dev *ps2dev = &psmouse->ps2dev; u8 param[4]; size_t i; static const struct { u16 command; u8 arg; } seq[] = { /* * Intellimouse initialization sequence, to get 4-byte instead * of 3-byte packets. */ { PSMOUSE_CMD_SETRATE, 0xC8 }, { PSMOUSE_CMD_SETRATE, 0x64 }, { PSMOUSE_CMD_SETRATE, 0x50 }, { PSMOUSE_CMD_GETID, 0 }, { PSMOUSE_CMD_ENABLE, 0 }, /* * BYD-specific initialization, which enables absolute mode and * (if desired), the touchpad's built-in gesture detection. */ { 0x10E2, 0x00 }, { 0x10E0, 0x02 }, /* The touchpad should reply with 4 seemingly-random bytes */ { 0x14E0, 0x01 }, /* Pairs of parameters and values. */ { BYD_CMD_SET_HANDEDNESS, 0x01 }, { BYD_CMD_SET_PHYSICAL_BUTTONS, 0x04 }, { BYD_CMD_SET_TAP, 0x02 }, { BYD_CMD_SET_ONE_FINGER_SCROLL, 0x04 }, { BYD_CMD_SET_ONE_FINGER_SCROLL_FUNC, 0x04 }, { BYD_CMD_SET_EDGE_MOTION, 0x01 }, { BYD_CMD_SET_PALM_CHECK, 0x00 }, { BYD_CMD_SET_MULTITOUCH, 0x02 }, { BYD_CMD_SET_TWO_FINGER_SCROLL, 0x04 }, { BYD_CMD_SET_TWO_FINGER_SCROLL_FUNC, 0x04 }, { BYD_CMD_SET_LEFT_EDGE_REGION, 0x00 }, { BYD_CMD_SET_TOP_EDGE_REGION, 0x00 }, { BYD_CMD_SET_RIGHT_EDGE_REGION, 0x00 }, { BYD_CMD_SET_BOTTOM_EDGE_REGION, 0x00 }, { BYD_CMD_SET_ABSOLUTE_MODE, 0x02 }, /* Finalize initialization. */ { 0x10E0, 0x00 }, { 0x10E2, 0x01 }, }; for (i = 0; i < ARRAY_SIZE(seq); ++i) { memset(param, 0, sizeof(param)); param[0] = seq[i].arg; if (ps2_command(ps2dev, param, seq[i].command)) return -EIO; } psmouse_set_state(psmouse, PSMOUSE_ACTIVATED); return 0; } static int byd_reconnect(struct psmouse *psmouse) { int retry = 0, error = 0; psmouse_dbg(psmouse, "Reconnect\n"); do { psmouse_reset(psmouse); if (retry) ssleep(1); error = byd_detect(psmouse, 0); } while (error && ++retry < 3); if (error) return error; psmouse_dbg(psmouse, "Reconnected after %d attempts\n", retry); error = byd_reset_touchpad(psmouse); if (error) { psmouse_err(psmouse, "Unable to initialize device\n"); return error; } return 0; } static void byd_disconnect(struct psmouse *psmouse) { struct byd_data *priv = psmouse->private; if (priv) { del_timer(&priv->timer); kfree(psmouse->private); psmouse->private = NULL; } } int byd_detect(struct psmouse *psmouse, bool set_properties) { struct ps2dev *ps2dev = &psmouse->ps2dev; u8 param[4] = {0x03, 0x00, 0x00, 0x00}; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -1; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -1; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -1; if (ps2_command(ps2dev, param, PSMOUSE_CMD_SETRES)) return -1; if (ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) return -1; if (param[1] != 0x03 || param[2] != 0x64) return -ENODEV; psmouse_dbg(psmouse, "BYD touchpad detected\n"); if (set_properties) { psmouse->vendor = "BYD"; psmouse->name = "TouchPad"; } return 0; } int byd_init(struct psmouse *psmouse) { struct input_dev *dev = psmouse->dev; struct byd_data *priv; if (psmouse_reset(psmouse)) return -EIO; if (byd_reset_touchpad(psmouse)) return -EIO; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; priv->psmouse = psmouse; timer_setup(&priv->timer, byd_clear_touch, 0); psmouse->private = priv; psmouse->disconnect = byd_disconnect; psmouse->reconnect = byd_reconnect; psmouse->protocol_handler = byd_process_byte; psmouse->pktsize = 4; psmouse->resync_time = 0; __set_bit(INPUT_PROP_POINTER, dev->propbit); /* Touchpad */ __set_bit(BTN_TOUCH, dev->keybit); __set_bit(BTN_TOOL_FINGER, dev->keybit); /* Buttons */ __set_bit(BTN_LEFT, dev->keybit); __set_bit(BTN_RIGHT, dev->keybit); __clear_bit(BTN_MIDDLE, dev->keybit); /* Absolute position */ __set_bit(EV_ABS, dev->evbit); input_set_abs_params(dev, ABS_X, 0, BYD_PAD_WIDTH, 0, 0); input_set_abs_params(dev, ABS_Y, 0, BYD_PAD_HEIGHT, 0, 0); input_abs_set_res(dev, ABS_X, BYD_PAD_RESOLUTION); input_abs_set_res(dev, ABS_Y, BYD_PAD_RESOLUTION); /* No relative support */ __clear_bit(EV_REL, dev->evbit); __clear_bit(REL_X, dev->relbit); __clear_bit(REL_Y, dev->relbit); return 0; } |