tjh.dev / kernel
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Input: hgpk - remove protocol support

The protocol flavor for ALPS touchpads found in OLPC laptops has been
broken since 2015 commit c378b5119eb0 ("Input: psmouse - factor out
common protocol probing code") that forgot to add hgpk_init() to HGPK
entry in psmouse_protocols array.

Since nobody complained for 10 years let's remove it.

Acked-by: Andres Salomon <dilinger@queued.net>
Link: https://patch.msgid.link/abC5U_JigA9TrGYu@google.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Dmitry Torokhov e732b2ac 0421ccdf

+2 -1156
-10
drivers/input/mouse/Kconfig
··· 164 164 165 165 If unsure, say N. 166 166 167 - config MOUSE_PS2_OLPC 168 - bool "OLPC PS/2 mouse protocol extension" 169 - depends on MOUSE_PS2 && OLPC 170 - help 171 - Say Y here if you have an OLPC XO-1 laptop (with built-in 172 - PS/2 touchpad/tablet device). The manufacturer calls the 173 - touchpad an HGPK. 174 - 175 - If unsure, say N. 176 - 177 167 config MOUSE_PS2_FOCALTECH 178 168 bool "FocalTech PS/2 mouse protocol extension" if EXPERT 179 169 default y
-1
drivers/input/mouse/Makefile
··· 29 29 psmouse-$(CONFIG_MOUSE_PS2_ALPS) += alps.o 30 30 psmouse-$(CONFIG_MOUSE_PS2_BYD) += byd.o 31 31 psmouse-$(CONFIG_MOUSE_PS2_ELANTECH) += elantech.o 32 - psmouse-$(CONFIG_MOUSE_PS2_OLPC) += hgpk.o 33 32 psmouse-$(CONFIG_MOUSE_PS2_LOGIPS2PP) += logips2pp.o 34 33 psmouse-$(CONFIG_MOUSE_PS2_LIFEBOOK) += lifebook.o 35 34 psmouse-$(CONFIG_MOUSE_PS2_SENTELIC) += sentelic.o
-1063
drivers/input/mouse/hgpk.c
··· 1 - // SPDX-License-Identifier: GPL-2.0-only 2 - /* 3 - * OLPC HGPK (XO-1) touchpad PS/2 mouse driver 4 - * 5 - * Copyright (c) 2006-2008 One Laptop Per Child 6 - * Authors: 7 - * Zephaniah E. Hull 8 - * Andres Salomon <dilinger@debian.org> 9 - * 10 - * This driver is partly based on the ALPS driver, which is: 11 - * 12 - * Copyright (c) 2003 Neil Brown <neilb@cse.unsw.edu.au> 13 - * Copyright (c) 2003-2005 Peter Osterlund <petero2@telia.com> 14 - * Copyright (c) 2004 Dmitry Torokhov <dtor@mail.ru> 15 - * Copyright (c) 2005 Vojtech Pavlik <vojtech@suse.cz> 16 - */ 17 - 18 - /* 19 - * The spec from ALPS is available from 20 - * <http://wiki.laptop.org/go/Touch_Pad/Tablet>. It refers to this 21 - * device as HGPK (Hybrid GS, PT, and Keymatrix). 22 - * 23 - * The earliest versions of the device had simultaneous reporting; that 24 - * was removed. After that, the device used the Advanced Mode GS/PT streaming 25 - * stuff. That turned out to be too buggy to support, so we've finally 26 - * switched to Mouse Mode (which utilizes only the center 1/3 of the touchpad). 27 - */ 28 - 29 - #define DEBUG 30 - #include <linux/slab.h> 31 - #include <linux/input.h> 32 - #include <linux/module.h> 33 - #include <linux/serio.h> 34 - #include <linux/libps2.h> 35 - #include <linux/delay.h> 36 - #include <asm/olpc.h> 37 - 38 - #include "psmouse.h" 39 - #include "hgpk.h" 40 - 41 - #define ILLEGAL_XY 999999 42 - 43 - static bool tpdebug; 44 - module_param(tpdebug, bool, 0644); 45 - MODULE_PARM_DESC(tpdebug, "enable debugging, dumping packets to KERN_DEBUG."); 46 - 47 - static int recalib_delta = 100; 48 - module_param(recalib_delta, int, 0644); 49 - MODULE_PARM_DESC(recalib_delta, 50 - "packets containing a delta this large will be discarded, and a " 51 - "recalibration may be scheduled."); 52 - 53 - static int jumpy_delay = 20; 54 - module_param(jumpy_delay, int, 0644); 55 - MODULE_PARM_DESC(jumpy_delay, 56 - "delay (ms) before recal after jumpiness detected"); 57 - 58 - static int spew_delay = 1; 59 - module_param(spew_delay, int, 0644); 60 - MODULE_PARM_DESC(spew_delay, 61 - "delay (ms) before recal after packet spew detected"); 62 - 63 - static int recal_guard_time; 64 - module_param(recal_guard_time, int, 0644); 65 - MODULE_PARM_DESC(recal_guard_time, 66 - "interval (ms) during which recal will be restarted if packet received"); 67 - 68 - static int post_interrupt_delay = 40; 69 - module_param(post_interrupt_delay, int, 0644); 70 - MODULE_PARM_DESC(post_interrupt_delay, 71 - "delay (ms) before recal after recal interrupt detected"); 72 - 73 - static bool autorecal = true; 74 - module_param(autorecal, bool, 0644); 75 - MODULE_PARM_DESC(autorecal, "enable recalibration in the driver"); 76 - 77 - static char hgpk_mode_name[16]; 78 - module_param_string(hgpk_mode, hgpk_mode_name, sizeof(hgpk_mode_name), 0644); 79 - MODULE_PARM_DESC(hgpk_mode, 80 - "default hgpk mode: mouse, glidesensor or pentablet"); 81 - 82 - static int hgpk_default_mode = HGPK_MODE_MOUSE; 83 - 84 - static const char * const hgpk_mode_names[] = { 85 - [HGPK_MODE_MOUSE] = "Mouse", 86 - [HGPK_MODE_GLIDESENSOR] = "GlideSensor", 87 - [HGPK_MODE_PENTABLET] = "PenTablet", 88 - }; 89 - 90 - static int hgpk_mode_from_name(const char *buf, int len) 91 - { 92 - int i; 93 - 94 - for (i = 0; i < ARRAY_SIZE(hgpk_mode_names); i++) { 95 - const char *name = hgpk_mode_names[i]; 96 - if (strlen(name) == len && !strncasecmp(name, buf, len)) 97 - return i; 98 - } 99 - 100 - return HGPK_MODE_INVALID; 101 - } 102 - 103 - /* 104 - * see if new value is within 20% of half of old value 105 - */ 106 - static int approx_half(int curr, int prev) 107 - { 108 - int belowhalf, abovehalf; 109 - 110 - if (curr < 5 || prev < 5) 111 - return 0; 112 - 113 - belowhalf = (prev * 8) / 20; 114 - abovehalf = (prev * 12) / 20; 115 - 116 - return belowhalf < curr && curr <= abovehalf; 117 - } 118 - 119 - /* 120 - * Throw out oddly large delta packets, and any that immediately follow whose 121 - * values are each approximately half of the previous. It seems that the ALPS 122 - * firmware emits errant packets, and they get averaged out slowly. 123 - */ 124 - static int hgpk_discard_decay_hack(struct psmouse *psmouse, int x, int y) 125 - { 126 - struct hgpk_data *priv = psmouse->private; 127 - int avx, avy; 128 - bool do_recal = false; 129 - 130 - avx = abs(x); 131 - avy = abs(y); 132 - 133 - /* discard if too big, or half that but > 4 times the prev delta */ 134 - if (avx > recalib_delta || 135 - (avx > recalib_delta / 2 && ((avx / 4) > priv->xlast))) { 136 - psmouse_warn(psmouse, "detected %dpx jump in x\n", x); 137 - priv->xbigj = avx; 138 - } else if (approx_half(avx, priv->xbigj)) { 139 - psmouse_warn(psmouse, "detected secondary %dpx jump in x\n", x); 140 - priv->xbigj = avx; 141 - priv->xsaw_secondary++; 142 - } else { 143 - if (priv->xbigj && priv->xsaw_secondary > 1) 144 - do_recal = true; 145 - priv->xbigj = 0; 146 - priv->xsaw_secondary = 0; 147 - } 148 - 149 - if (avy > recalib_delta || 150 - (avy > recalib_delta / 2 && ((avy / 4) > priv->ylast))) { 151 - psmouse_warn(psmouse, "detected %dpx jump in y\n", y); 152 - priv->ybigj = avy; 153 - } else if (approx_half(avy, priv->ybigj)) { 154 - psmouse_warn(psmouse, "detected secondary %dpx jump in y\n", y); 155 - priv->ybigj = avy; 156 - priv->ysaw_secondary++; 157 - } else { 158 - if (priv->ybigj && priv->ysaw_secondary > 1) 159 - do_recal = true; 160 - priv->ybigj = 0; 161 - priv->ysaw_secondary = 0; 162 - } 163 - 164 - priv->xlast = avx; 165 - priv->ylast = avy; 166 - 167 - if (do_recal && jumpy_delay) { 168 - psmouse_warn(psmouse, "scheduling recalibration\n"); 169 - psmouse_queue_work(psmouse, &priv->recalib_wq, 170 - msecs_to_jiffies(jumpy_delay)); 171 - } 172 - 173 - return priv->xbigj || priv->ybigj; 174 - } 175 - 176 - static void hgpk_reset_spew_detection(struct hgpk_data *priv) 177 - { 178 - priv->spew_count = 0; 179 - priv->dupe_count = 0; 180 - priv->x_tally = 0; 181 - priv->y_tally = 0; 182 - priv->spew_flag = NO_SPEW; 183 - } 184 - 185 - static void hgpk_reset_hack_state(struct psmouse *psmouse) 186 - { 187 - struct hgpk_data *priv = psmouse->private; 188 - 189 - priv->abs_x = priv->abs_y = -1; 190 - priv->xlast = priv->ylast = ILLEGAL_XY; 191 - priv->xbigj = priv->ybigj = 0; 192 - priv->xsaw_secondary = priv->ysaw_secondary = 0; 193 - hgpk_reset_spew_detection(priv); 194 - } 195 - 196 - /* 197 - * We have no idea why this particular hardware bug occurs. The touchpad 198 - * will randomly start spewing packets without anything touching the 199 - * pad. This wouldn't necessarily be bad, but it's indicative of a 200 - * severely miscalibrated pad; attempting to use the touchpad while it's 201 - * spewing means the cursor will jump all over the place, and act "drunk". 202 - * 203 - * The packets that are spewed tend to all have deltas between -2 and 2, and 204 - * the cursor will move around without really going very far. It will 205 - * tend to end up in the same location; if we tally up the changes over 206 - * 100 packets, we end up w/ a final delta of close to 0. This happens 207 - * pretty regularly when the touchpad is spewing, and is pretty hard to 208 - * manually trigger (at least for *my* fingers). So, it makes a perfect 209 - * scheme for detecting spews. 210 - */ 211 - static void hgpk_spewing_hack(struct psmouse *psmouse, 212 - int l, int r, int x, int y) 213 - { 214 - struct hgpk_data *priv = psmouse->private; 215 - 216 - /* ignore button press packets; many in a row could trigger 217 - * a false-positive! */ 218 - if (l || r) 219 - return; 220 - 221 - /* don't track spew if the workaround feature has been turned off */ 222 - if (!spew_delay) 223 - return; 224 - 225 - if (abs(x) > 3 || abs(y) > 3) { 226 - /* no spew, or spew ended */ 227 - hgpk_reset_spew_detection(priv); 228 - return; 229 - } 230 - 231 - /* Keep a tally of the overall delta to the cursor position caused by 232 - * the spew */ 233 - priv->x_tally += x; 234 - priv->y_tally += y; 235 - 236 - switch (priv->spew_flag) { 237 - case NO_SPEW: 238 - /* we're not spewing, but this packet might be the start */ 239 - priv->spew_flag = MAYBE_SPEWING; 240 - 241 - fallthrough; 242 - 243 - case MAYBE_SPEWING: 244 - priv->spew_count++; 245 - 246 - if (priv->spew_count < SPEW_WATCH_COUNT) 247 - break; 248 - 249 - /* excessive spew detected, request recalibration */ 250 - priv->spew_flag = SPEW_DETECTED; 251 - 252 - fallthrough; 253 - 254 - case SPEW_DETECTED: 255 - /* only recalibrate when the overall delta to the cursor 256 - * is really small. if the spew is causing significant cursor 257 - * movement, it is probably a case of the user moving the 258 - * cursor very slowly across the screen. */ 259 - if (abs(priv->x_tally) < 3 && abs(priv->y_tally) < 3) { 260 - psmouse_warn(psmouse, "packet spew detected (%d,%d)\n", 261 - priv->x_tally, priv->y_tally); 262 - priv->spew_flag = RECALIBRATING; 263 - psmouse_queue_work(psmouse, &priv->recalib_wq, 264 - msecs_to_jiffies(spew_delay)); 265 - } 266 - 267 - break; 268 - case RECALIBRATING: 269 - /* we already detected a spew and requested a recalibration, 270 - * just wait for the queue to kick into action. */ 271 - break; 272 - } 273 - } 274 - 275 - /* 276 - * HGPK Mouse Mode format (standard mouse format, sans middle button) 277 - * 278 - * byte 0: y-over x-over y-neg x-neg 1 0 swr swl 279 - * byte 1: x7 x6 x5 x4 x3 x2 x1 x0 280 - * byte 2: y7 y6 y5 y4 y3 y2 y1 y0 281 - * 282 - * swr/swl are the left/right buttons. 283 - * x-neg/y-neg are the x and y delta negative bits 284 - * x-over/y-over are the x and y overflow bits 285 - * 286 - * --- 287 - * 288 - * HGPK Advanced Mode - single-mode format 289 - * 290 - * byte 0(PT): 1 1 0 0 1 1 1 1 291 - * byte 0(GS): 1 1 1 1 1 1 1 1 292 - * byte 1: 0 x6 x5 x4 x3 x2 x1 x0 293 - * byte 2(PT): 0 0 x9 x8 x7 ? pt-dsw 0 294 - * byte 2(GS): 0 x10 x9 x8 x7 ? gs-dsw pt-dsw 295 - * byte 3: 0 y9 y8 y7 1 0 swr swl 296 - * byte 4: 0 y6 y5 y4 y3 y2 y1 y0 297 - * byte 5: 0 z6 z5 z4 z3 z2 z1 z0 298 - * 299 - * ?'s are not defined in the protocol spec, may vary between models. 300 - * 301 - * swr/swl are the left/right buttons. 302 - * 303 - * pt-dsw/gs-dsw indicate that the pt/gs sensor is detecting a 304 - * pen/finger 305 - */ 306 - static bool hgpk_is_byte_valid(struct psmouse *psmouse, unsigned char *packet) 307 - { 308 - struct hgpk_data *priv = psmouse->private; 309 - int pktcnt = psmouse->pktcnt; 310 - bool valid; 311 - 312 - switch (priv->mode) { 313 - case HGPK_MODE_MOUSE: 314 - valid = (packet[0] & 0x0C) == 0x08; 315 - break; 316 - 317 - case HGPK_MODE_GLIDESENSOR: 318 - valid = pktcnt == 1 ? 319 - packet[0] == HGPK_GS : !(packet[pktcnt - 1] & 0x80); 320 - break; 321 - 322 - case HGPK_MODE_PENTABLET: 323 - valid = pktcnt == 1 ? 324 - packet[0] == HGPK_PT : !(packet[pktcnt - 1] & 0x80); 325 - break; 326 - 327 - default: 328 - valid = false; 329 - break; 330 - } 331 - 332 - if (!valid) 333 - psmouse_dbg(psmouse, 334 - "bad data, mode %d (%d) %*ph\n", 335 - priv->mode, pktcnt, 6, psmouse->packet); 336 - 337 - return valid; 338 - } 339 - 340 - static void hgpk_process_advanced_packet(struct psmouse *psmouse) 341 - { 342 - struct hgpk_data *priv = psmouse->private; 343 - struct input_dev *idev = psmouse->dev; 344 - unsigned char *packet = psmouse->packet; 345 - int down = !!(packet[2] & 2); 346 - int left = !!(packet[3] & 1); 347 - int right = !!(packet[3] & 2); 348 - int x = packet[1] | ((packet[2] & 0x78) << 4); 349 - int y = packet[4] | ((packet[3] & 0x70) << 3); 350 - 351 - if (priv->mode == HGPK_MODE_GLIDESENSOR) { 352 - int pt_down = !!(packet[2] & 1); 353 - int finger_down = !!(packet[2] & 2); 354 - int z = packet[5]; 355 - 356 - input_report_abs(idev, ABS_PRESSURE, z); 357 - if (tpdebug) 358 - psmouse_dbg(psmouse, "pd=%d fd=%d z=%d", 359 - pt_down, finger_down, z); 360 - } else { 361 - /* 362 - * PenTablet mode does not report pressure, so we don't 363 - * report it here 364 - */ 365 - if (tpdebug) 366 - psmouse_dbg(psmouse, "pd=%d ", down); 367 - } 368 - 369 - if (tpdebug) 370 - psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", 371 - left, right, x, y); 372 - 373 - input_report_key(idev, BTN_TOUCH, down); 374 - input_report_key(idev, BTN_LEFT, left); 375 - input_report_key(idev, BTN_RIGHT, right); 376 - 377 - /* 378 - * If this packet says that the finger was removed, reset our position 379 - * tracking so that we don't erroneously detect a jump on next press. 380 - */ 381 - if (!down) { 382 - hgpk_reset_hack_state(psmouse); 383 - goto done; 384 - } 385 - 386 - /* 387 - * Weed out duplicate packets (we get quite a few, and they mess up 388 - * our jump detection) 389 - */ 390 - if (x == priv->abs_x && y == priv->abs_y) { 391 - if (++priv->dupe_count > SPEW_WATCH_COUNT) { 392 - if (tpdebug) 393 - psmouse_dbg(psmouse, "hard spew detected\n"); 394 - priv->spew_flag = RECALIBRATING; 395 - psmouse_queue_work(psmouse, &priv->recalib_wq, 396 - msecs_to_jiffies(spew_delay)); 397 - } 398 - goto done; 399 - } 400 - 401 - /* not a duplicate, continue with position reporting */ 402 - priv->dupe_count = 0; 403 - 404 - /* Don't apply hacks in PT mode, it seems reliable */ 405 - if (priv->mode != HGPK_MODE_PENTABLET && priv->abs_x != -1) { 406 - int x_diff = priv->abs_x - x; 407 - int y_diff = priv->abs_y - y; 408 - if (hgpk_discard_decay_hack(psmouse, x_diff, y_diff)) { 409 - if (tpdebug) 410 - psmouse_dbg(psmouse, "discarding\n"); 411 - goto done; 412 - } 413 - hgpk_spewing_hack(psmouse, left, right, x_diff, y_diff); 414 - } 415 - 416 - input_report_abs(idev, ABS_X, x); 417 - input_report_abs(idev, ABS_Y, y); 418 - priv->abs_x = x; 419 - priv->abs_y = y; 420 - 421 - done: 422 - input_sync(idev); 423 - } 424 - 425 - static void hgpk_process_simple_packet(struct psmouse *psmouse) 426 - { 427 - struct input_dev *dev = psmouse->dev; 428 - unsigned char *packet = psmouse->packet; 429 - int left = packet[0] & 1; 430 - int right = (packet[0] >> 1) & 1; 431 - int x = packet[1] - ((packet[0] << 4) & 0x100); 432 - int y = ((packet[0] << 3) & 0x100) - packet[2]; 433 - 434 - if (packet[0] & 0xc0) 435 - psmouse_dbg(psmouse, 436 - "overflow -- 0x%02x 0x%02x 0x%02x\n", 437 - packet[0], packet[1], packet[2]); 438 - 439 - if (hgpk_discard_decay_hack(psmouse, x, y)) { 440 - if (tpdebug) 441 - psmouse_dbg(psmouse, "discarding\n"); 442 - return; 443 - } 444 - 445 - hgpk_spewing_hack(psmouse, left, right, x, y); 446 - 447 - if (tpdebug) 448 - psmouse_dbg(psmouse, "l=%d r=%d x=%d y=%d\n", 449 - left, right, x, y); 450 - 451 - input_report_key(dev, BTN_LEFT, left); 452 - input_report_key(dev, BTN_RIGHT, right); 453 - 454 - input_report_rel(dev, REL_X, x); 455 - input_report_rel(dev, REL_Y, y); 456 - 457 - input_sync(dev); 458 - } 459 - 460 - static psmouse_ret_t hgpk_process_byte(struct psmouse *psmouse) 461 - { 462 - struct hgpk_data *priv = psmouse->private; 463 - 464 - if (!hgpk_is_byte_valid(psmouse, psmouse->packet)) 465 - return PSMOUSE_BAD_DATA; 466 - 467 - if (psmouse->pktcnt >= psmouse->pktsize) { 468 - if (priv->mode == HGPK_MODE_MOUSE) 469 - hgpk_process_simple_packet(psmouse); 470 - else 471 - hgpk_process_advanced_packet(psmouse); 472 - return PSMOUSE_FULL_PACKET; 473 - } 474 - 475 - if (priv->recalib_window) { 476 - if (time_before(jiffies, priv->recalib_window)) { 477 - /* 478 - * ugh, got a packet inside our recalibration 479 - * window, schedule another recalibration. 480 - */ 481 - psmouse_dbg(psmouse, 482 - "packet inside calibration window, queueing another recalibration\n"); 483 - psmouse_queue_work(psmouse, &priv->recalib_wq, 484 - msecs_to_jiffies(post_interrupt_delay)); 485 - } 486 - priv->recalib_window = 0; 487 - } 488 - 489 - return PSMOUSE_GOOD_DATA; 490 - } 491 - 492 - static int hgpk_select_mode(struct psmouse *psmouse) 493 - { 494 - struct ps2dev *ps2dev = &psmouse->ps2dev; 495 - struct hgpk_data *priv = psmouse->private; 496 - int i; 497 - int cmd; 498 - 499 - /* 500 - * 4 disables to enable advanced mode 501 - * then 3 0xf2 bytes as the preamble for GS/PT selection 502 - */ 503 - const int advanced_init[] = { 504 - PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, 505 - PSMOUSE_CMD_DISABLE, PSMOUSE_CMD_DISABLE, 506 - 0xf2, 0xf2, 0xf2, 507 - }; 508 - 509 - switch (priv->mode) { 510 - case HGPK_MODE_MOUSE: 511 - psmouse->pktsize = 3; 512 - break; 513 - 514 - case HGPK_MODE_GLIDESENSOR: 515 - case HGPK_MODE_PENTABLET: 516 - psmouse->pktsize = 6; 517 - 518 - /* Switch to 'Advanced mode.', four disables in a row. */ 519 - for (i = 0; i < ARRAY_SIZE(advanced_init); i++) 520 - if (ps2_command(ps2dev, NULL, advanced_init[i])) 521 - return -EIO; 522 - 523 - /* select between GlideSensor (mouse) or PenTablet */ 524 - cmd = priv->mode == HGPK_MODE_GLIDESENSOR ? 525 - PSMOUSE_CMD_SETSCALE11 : PSMOUSE_CMD_SETSCALE21; 526 - 527 - if (ps2_command(ps2dev, NULL, cmd)) 528 - return -EIO; 529 - break; 530 - 531 - default: 532 - return -EINVAL; 533 - } 534 - 535 - return 0; 536 - } 537 - 538 - static void hgpk_setup_input_device(struct input_dev *input, 539 - struct input_dev *old_input, 540 - enum hgpk_mode mode) 541 - { 542 - if (old_input) { 543 - input->name = old_input->name; 544 - input->phys = old_input->phys; 545 - input->id = old_input->id; 546 - input->dev.parent = old_input->dev.parent; 547 - } 548 - 549 - memset(input->evbit, 0, sizeof(input->evbit)); 550 - memset(input->relbit, 0, sizeof(input->relbit)); 551 - memset(input->keybit, 0, sizeof(input->keybit)); 552 - 553 - /* All modes report left and right buttons */ 554 - __set_bit(EV_KEY, input->evbit); 555 - __set_bit(BTN_LEFT, input->keybit); 556 - __set_bit(BTN_RIGHT, input->keybit); 557 - 558 - switch (mode) { 559 - case HGPK_MODE_MOUSE: 560 - __set_bit(EV_REL, input->evbit); 561 - __set_bit(REL_X, input->relbit); 562 - __set_bit(REL_Y, input->relbit); 563 - break; 564 - 565 - case HGPK_MODE_GLIDESENSOR: 566 - __set_bit(BTN_TOUCH, input->keybit); 567 - __set_bit(BTN_TOOL_FINGER, input->keybit); 568 - 569 - __set_bit(EV_ABS, input->evbit); 570 - 571 - /* GlideSensor has pressure sensor, PenTablet does not */ 572 - input_set_abs_params(input, ABS_PRESSURE, 0, 15, 0, 0); 573 - 574 - /* From device specs */ 575 - input_set_abs_params(input, ABS_X, 0, 399, 0, 0); 576 - input_set_abs_params(input, ABS_Y, 0, 290, 0, 0); 577 - 578 - /* Calculated by hand based on usable size (52mm x 38mm) */ 579 - input_abs_set_res(input, ABS_X, 8); 580 - input_abs_set_res(input, ABS_Y, 8); 581 - break; 582 - 583 - case HGPK_MODE_PENTABLET: 584 - __set_bit(BTN_TOUCH, input->keybit); 585 - __set_bit(BTN_TOOL_FINGER, input->keybit); 586 - 587 - __set_bit(EV_ABS, input->evbit); 588 - 589 - /* From device specs */ 590 - input_set_abs_params(input, ABS_X, 0, 999, 0, 0); 591 - input_set_abs_params(input, ABS_Y, 5, 239, 0, 0); 592 - 593 - /* Calculated by hand based on usable size (156mm x 38mm) */ 594 - input_abs_set_res(input, ABS_X, 6); 595 - input_abs_set_res(input, ABS_Y, 8); 596 - break; 597 - 598 - default: 599 - BUG(); 600 - } 601 - } 602 - 603 - static int hgpk_reset_device(struct psmouse *psmouse, bool recalibrate) 604 - { 605 - int err; 606 - 607 - psmouse_reset(psmouse); 608 - 609 - if (recalibrate) { 610 - struct ps2dev *ps2dev = &psmouse->ps2dev; 611 - 612 - /* send the recalibrate request */ 613 - if (ps2_command(ps2dev, NULL, 0xf5) || 614 - ps2_command(ps2dev, NULL, 0xf5) || 615 - ps2_command(ps2dev, NULL, 0xe6) || 616 - ps2_command(ps2dev, NULL, 0xf5)) { 617 - return -1; 618 - } 619 - 620 - /* according to ALPS, 150mS is required for recalibration */ 621 - msleep(150); 622 - } 623 - 624 - err = hgpk_select_mode(psmouse); 625 - if (err) { 626 - psmouse_err(psmouse, "failed to select mode\n"); 627 - return err; 628 - } 629 - 630 - hgpk_reset_hack_state(psmouse); 631 - 632 - return 0; 633 - } 634 - 635 - static int hgpk_force_recalibrate(struct psmouse *psmouse) 636 - { 637 - struct hgpk_data *priv = psmouse->private; 638 - int err; 639 - 640 - /* C-series touchpads added the recalibrate command */ 641 - if (psmouse->model < HGPK_MODEL_C) 642 - return 0; 643 - 644 - if (!autorecal) { 645 - psmouse_dbg(psmouse, "recalibration disabled, ignoring\n"); 646 - return 0; 647 - } 648 - 649 - psmouse_dbg(psmouse, "recalibrating touchpad..\n"); 650 - 651 - /* we don't want to race with the irq handler, nor with resyncs */ 652 - psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 653 - 654 - /* start by resetting the device */ 655 - err = hgpk_reset_device(psmouse, true); 656 - if (err) 657 - return err; 658 - 659 - /* 660 - * XXX: If a finger is down during this delay, recalibration will 661 - * detect capacitance incorrectly. This is a hardware bug, and 662 - * we don't have a good way to deal with it. The 2s window stuff 663 - * (below) is our best option for now. 664 - */ 665 - if (psmouse_activate(psmouse)) 666 - return -1; 667 - 668 - if (tpdebug) 669 - psmouse_dbg(psmouse, "touchpad reactivated\n"); 670 - 671 - /* 672 - * If we get packets right away after recalibrating, it's likely 673 - * that a finger was on the touchpad. If so, it's probably 674 - * miscalibrated, so we optionally schedule another. 675 - */ 676 - if (recal_guard_time) 677 - priv->recalib_window = jiffies + 678 - msecs_to_jiffies(recal_guard_time); 679 - 680 - return 0; 681 - } 682 - 683 - /* 684 - * This puts the touchpad in a power saving mode; according to ALPS, current 685 - * consumption goes down to 50uA after running this. To turn power back on, 686 - * we drive MS-DAT low. Measuring with a 1mA resolution ammeter says that 687 - * the current on the SUS_3.3V rail drops from 3mA or 4mA to 0 when we do this. 688 - * 689 - * We have no formal spec that details this operation -- the low-power 690 - * sequence came from a long-lost email trail. 691 - */ 692 - static int hgpk_toggle_powersave(struct psmouse *psmouse, int enable) 693 - { 694 - struct ps2dev *ps2dev = &psmouse->ps2dev; 695 - int timeo; 696 - int err; 697 - 698 - /* Added on D-series touchpads */ 699 - if (psmouse->model < HGPK_MODEL_D) 700 - return 0; 701 - 702 - if (enable) { 703 - psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 704 - 705 - /* 706 - * Sending a byte will drive MS-DAT low; this will wake up 707 - * the controller. Once we get an ACK back from it, it 708 - * means we can continue with the touchpad re-init. ALPS 709 - * tells us that 1s should be long enough, so set that as 710 - * the upper bound. (in practice, it takes about 3 loops.) 711 - */ 712 - for (timeo = 20; timeo > 0; timeo--) { 713 - if (!ps2_sendbyte(ps2dev, PSMOUSE_CMD_DISABLE, 20)) 714 - break; 715 - msleep(25); 716 - } 717 - 718 - err = hgpk_reset_device(psmouse, false); 719 - if (err) { 720 - psmouse_err(psmouse, "Failed to reset device!\n"); 721 - return err; 722 - } 723 - 724 - /* should be all set, enable the touchpad */ 725 - psmouse_activate(psmouse); 726 - psmouse_dbg(psmouse, "Touchpad powered up.\n"); 727 - } else { 728 - psmouse_dbg(psmouse, "Powering off touchpad.\n"); 729 - 730 - if (ps2_command(ps2dev, NULL, 0xec) || 731 - ps2_command(ps2dev, NULL, 0xec) || 732 - ps2_command(ps2dev, NULL, 0xea)) { 733 - return -1; 734 - } 735 - 736 - psmouse_set_state(psmouse, PSMOUSE_IGNORE); 737 - 738 - /* probably won't see an ACK, the touchpad will be off */ 739 - ps2_sendbyte(ps2dev, 0xec, 20); 740 - } 741 - 742 - return 0; 743 - } 744 - 745 - static int hgpk_poll(struct psmouse *psmouse) 746 - { 747 - /* We can't poll, so always return failure. */ 748 - return -1; 749 - } 750 - 751 - static int hgpk_reconnect(struct psmouse *psmouse) 752 - { 753 - struct hgpk_data *priv = psmouse->private; 754 - 755 - /* 756 - * During suspend/resume the ps2 rails remain powered. We don't want 757 - * to do a reset because it's flush data out of buffers; however, 758 - * earlier prototypes (B1) had some brokenness that required a reset. 759 - */ 760 - if (olpc_board_at_least(olpc_board(0xb2))) 761 - if (psmouse->ps2dev.serio->dev.power.power_state.event != 762 - PM_EVENT_ON) 763 - return 0; 764 - 765 - priv->powered = 1; 766 - return hgpk_reset_device(psmouse, false); 767 - } 768 - 769 - static ssize_t hgpk_show_powered(struct psmouse *psmouse, void *data, char *buf) 770 - { 771 - struct hgpk_data *priv = psmouse->private; 772 - 773 - return sprintf(buf, "%d\n", priv->powered); 774 - } 775 - 776 - static ssize_t hgpk_set_powered(struct psmouse *psmouse, void *data, 777 - const char *buf, size_t count) 778 - { 779 - struct hgpk_data *priv = psmouse->private; 780 - unsigned int value; 781 - int err; 782 - 783 - err = kstrtouint(buf, 10, &value); 784 - if (err) 785 - return err; 786 - 787 - if (value > 1) 788 - return -EINVAL; 789 - 790 - if (value != priv->powered) { 791 - /* 792 - * hgpk_toggle_power will deal w/ state so 793 - * we're not racing w/ irq 794 - */ 795 - err = hgpk_toggle_powersave(psmouse, value); 796 - if (!err) 797 - priv->powered = value; 798 - } 799 - 800 - return err ? err : count; 801 - } 802 - 803 - __PSMOUSE_DEFINE_ATTR(powered, S_IWUSR | S_IRUGO, NULL, 804 - hgpk_show_powered, hgpk_set_powered, false); 805 - 806 - static ssize_t attr_show_mode(struct psmouse *psmouse, void *data, char *buf) 807 - { 808 - struct hgpk_data *priv = psmouse->private; 809 - 810 - return sprintf(buf, "%s\n", hgpk_mode_names[priv->mode]); 811 - } 812 - 813 - static ssize_t attr_set_mode(struct psmouse *psmouse, void *data, 814 - const char *buf, size_t len) 815 - { 816 - struct hgpk_data *priv = psmouse->private; 817 - enum hgpk_mode old_mode = priv->mode; 818 - enum hgpk_mode new_mode = hgpk_mode_from_name(buf, len); 819 - struct input_dev *old_dev = psmouse->dev; 820 - struct input_dev *new_dev; 821 - int err; 822 - 823 - if (new_mode == HGPK_MODE_INVALID) 824 - return -EINVAL; 825 - 826 - if (old_mode == new_mode) 827 - return len; 828 - 829 - new_dev = input_allocate_device(); 830 - if (!new_dev) 831 - return -ENOMEM; 832 - 833 - psmouse_set_state(psmouse, PSMOUSE_INITIALIZING); 834 - 835 - /* Switch device into the new mode */ 836 - priv->mode = new_mode; 837 - err = hgpk_reset_device(psmouse, false); 838 - if (err) 839 - goto err_try_restore; 840 - 841 - hgpk_setup_input_device(new_dev, old_dev, new_mode); 842 - 843 - psmouse_set_state(psmouse, PSMOUSE_CMD_MODE); 844 - 845 - err = input_register_device(new_dev); 846 - if (err) 847 - goto err_try_restore; 848 - 849 - psmouse->dev = new_dev; 850 - input_unregister_device(old_dev); 851 - 852 - return len; 853 - 854 - err_try_restore: 855 - input_free_device(new_dev); 856 - priv->mode = old_mode; 857 - hgpk_reset_device(psmouse, false); 858 - 859 - return err; 860 - } 861 - 862 - PSMOUSE_DEFINE_ATTR(hgpk_mode, S_IWUSR | S_IRUGO, NULL, 863 - attr_show_mode, attr_set_mode); 864 - 865 - static ssize_t hgpk_trigger_recal_show(struct psmouse *psmouse, 866 - void *data, char *buf) 867 - { 868 - return -EINVAL; 869 - } 870 - 871 - static ssize_t hgpk_trigger_recal(struct psmouse *psmouse, void *data, 872 - const char *buf, size_t count) 873 - { 874 - struct hgpk_data *priv = psmouse->private; 875 - unsigned int value; 876 - int err; 877 - 878 - err = kstrtouint(buf, 10, &value); 879 - if (err) 880 - return err; 881 - 882 - if (value != 1) 883 - return -EINVAL; 884 - 885 - /* 886 - * We queue work instead of doing recalibration right here 887 - * to avoid adding locking to hgpk_force_recalibrate() 888 - * since workqueue provides serialization. 889 - */ 890 - psmouse_queue_work(psmouse, &priv->recalib_wq, 0); 891 - return count; 892 - } 893 - 894 - __PSMOUSE_DEFINE_ATTR(recalibrate, S_IWUSR | S_IRUGO, NULL, 895 - hgpk_trigger_recal_show, hgpk_trigger_recal, false); 896 - 897 - static void hgpk_disconnect(struct psmouse *psmouse) 898 - { 899 - struct hgpk_data *priv = psmouse->private; 900 - 901 - device_remove_file(&psmouse->ps2dev.serio->dev, 902 - &psmouse_attr_powered.dattr); 903 - device_remove_file(&psmouse->ps2dev.serio->dev, 904 - &psmouse_attr_hgpk_mode.dattr); 905 - 906 - if (psmouse->model >= HGPK_MODEL_C) 907 - device_remove_file(&psmouse->ps2dev.serio->dev, 908 - &psmouse_attr_recalibrate.dattr); 909 - 910 - psmouse_reset(psmouse); 911 - kfree(priv); 912 - } 913 - 914 - static void hgpk_recalib_work(struct work_struct *work) 915 - { 916 - struct delayed_work *w = to_delayed_work(work); 917 - struct hgpk_data *priv = container_of(w, struct hgpk_data, recalib_wq); 918 - struct psmouse *psmouse = priv->psmouse; 919 - 920 - if (hgpk_force_recalibrate(psmouse)) 921 - psmouse_err(psmouse, "recalibration failed!\n"); 922 - } 923 - 924 - static int hgpk_register(struct psmouse *psmouse) 925 - { 926 - struct hgpk_data *priv = psmouse->private; 927 - int err; 928 - 929 - /* register handlers */ 930 - psmouse->protocol_handler = hgpk_process_byte; 931 - psmouse->poll = hgpk_poll; 932 - psmouse->disconnect = hgpk_disconnect; 933 - psmouse->reconnect = hgpk_reconnect; 934 - 935 - /* Disable the idle resync. */ 936 - psmouse->resync_time = 0; 937 - /* Reset after a lot of bad bytes. */ 938 - psmouse->resetafter = 1024; 939 - 940 - hgpk_setup_input_device(psmouse->dev, NULL, priv->mode); 941 - 942 - err = device_create_file(&psmouse->ps2dev.serio->dev, 943 - &psmouse_attr_powered.dattr); 944 - if (err) { 945 - psmouse_err(psmouse, "Failed creating 'powered' sysfs node\n"); 946 - return err; 947 - } 948 - 949 - err = device_create_file(&psmouse->ps2dev.serio->dev, 950 - &psmouse_attr_hgpk_mode.dattr); 951 - if (err) { 952 - psmouse_err(psmouse, 953 - "Failed creating 'hgpk_mode' sysfs node\n"); 954 - goto err_remove_powered; 955 - } 956 - 957 - /* C-series touchpads added the recalibrate command */ 958 - if (psmouse->model >= HGPK_MODEL_C) { 959 - err = device_create_file(&psmouse->ps2dev.serio->dev, 960 - &psmouse_attr_recalibrate.dattr); 961 - if (err) { 962 - psmouse_err(psmouse, 963 - "Failed creating 'recalibrate' sysfs node\n"); 964 - goto err_remove_mode; 965 - } 966 - } 967 - 968 - return 0; 969 - 970 - err_remove_mode: 971 - device_remove_file(&psmouse->ps2dev.serio->dev, 972 - &psmouse_attr_hgpk_mode.dattr); 973 - err_remove_powered: 974 - device_remove_file(&psmouse->ps2dev.serio->dev, 975 - &psmouse_attr_powered.dattr); 976 - return err; 977 - } 978 - 979 - int hgpk_init(struct psmouse *psmouse) 980 - { 981 - struct hgpk_data *priv; 982 - int err; 983 - 984 - priv = kzalloc_obj(*priv); 985 - if (!priv) { 986 - err = -ENOMEM; 987 - goto alloc_fail; 988 - } 989 - 990 - psmouse->private = priv; 991 - 992 - priv->psmouse = psmouse; 993 - priv->powered = true; 994 - priv->mode = hgpk_default_mode; 995 - INIT_DELAYED_WORK(&priv->recalib_wq, hgpk_recalib_work); 996 - 997 - err = hgpk_reset_device(psmouse, false); 998 - if (err) 999 - goto init_fail; 1000 - 1001 - err = hgpk_register(psmouse); 1002 - if (err) 1003 - goto init_fail; 1004 - 1005 - return 0; 1006 - 1007 - init_fail: 1008 - kfree(priv); 1009 - alloc_fail: 1010 - return err; 1011 - } 1012 - 1013 - static enum hgpk_model_t hgpk_get_model(struct psmouse *psmouse) 1014 - { 1015 - struct ps2dev *ps2dev = &psmouse->ps2dev; 1016 - unsigned char param[3]; 1017 - 1018 - /* E7, E7, E7, E9 gets us a 3 byte identifier */ 1019 - if (ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1020 - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1021 - ps2_command(ps2dev, NULL, PSMOUSE_CMD_SETSCALE21) || 1022 - ps2_command(ps2dev, param, PSMOUSE_CMD_GETINFO)) { 1023 - return -EIO; 1024 - } 1025 - 1026 - psmouse_dbg(psmouse, "ID: %*ph\n", 3, param); 1027 - 1028 - /* HGPK signature: 0x67, 0x00, 0x<model> */ 1029 - if (param[0] != 0x67 || param[1] != 0x00) 1030 - return -ENODEV; 1031 - 1032 - psmouse_info(psmouse, "OLPC touchpad revision 0x%x\n", param[2]); 1033 - 1034 - return param[2]; 1035 - } 1036 - 1037 - int hgpk_detect(struct psmouse *psmouse, bool set_properties) 1038 - { 1039 - int version; 1040 - 1041 - version = hgpk_get_model(psmouse); 1042 - if (version < 0) 1043 - return version; 1044 - 1045 - if (set_properties) { 1046 - psmouse->vendor = "ALPS"; 1047 - psmouse->name = "HGPK"; 1048 - psmouse->model = version; 1049 - } 1050 - 1051 - return 0; 1052 - } 1053 - 1054 - void hgpk_module_init(void) 1055 - { 1056 - hgpk_default_mode = hgpk_mode_from_name(hgpk_mode_name, 1057 - strlen(hgpk_mode_name)); 1058 - if (hgpk_default_mode == HGPK_MODE_INVALID) { 1059 - hgpk_default_mode = HGPK_MODE_MOUSE; 1060 - strscpy(hgpk_mode_name, hgpk_mode_names[HGPK_MODE_MOUSE], 1061 - sizeof(hgpk_mode_name)); 1062 - } 1063 - }
-61
drivers/input/mouse/hgpk.h
··· 1 - /* SPDX-License-Identifier: GPL-2.0 */ 2 - /* 3 - * OLPC HGPK (XO-1) touchpad PS/2 mouse driver 4 - */ 5 - 6 - #ifndef _HGPK_H 7 - #define _HGPK_H 8 - 9 - #define HGPK_GS 0xff /* The GlideSensor */ 10 - #define HGPK_PT 0xcf /* The PenTablet */ 11 - 12 - enum hgpk_model_t { 13 - HGPK_MODEL_PREA = 0x0a, /* pre-B1s */ 14 - HGPK_MODEL_A = 0x14, /* found on B1s, PT disabled in hardware */ 15 - HGPK_MODEL_B = 0x28, /* B2s, has capacitance issues */ 16 - HGPK_MODEL_C = 0x3c, 17 - HGPK_MODEL_D = 0x50, /* C1, mass production */ 18 - }; 19 - 20 - enum hgpk_spew_flag { 21 - NO_SPEW, 22 - MAYBE_SPEWING, 23 - SPEW_DETECTED, 24 - RECALIBRATING, 25 - }; 26 - 27 - #define SPEW_WATCH_COUNT 42 /* at 12ms/packet, this is 1/2 second */ 28 - 29 - enum hgpk_mode { 30 - HGPK_MODE_MOUSE, 31 - HGPK_MODE_GLIDESENSOR, 32 - HGPK_MODE_PENTABLET, 33 - HGPK_MODE_INVALID 34 - }; 35 - 36 - struct hgpk_data { 37 - struct psmouse *psmouse; 38 - enum hgpk_mode mode; 39 - bool powered; 40 - enum hgpk_spew_flag spew_flag; 41 - int spew_count, x_tally, y_tally; /* spew detection */ 42 - unsigned long recalib_window; 43 - struct delayed_work recalib_wq; 44 - int abs_x, abs_y; 45 - int dupe_count; 46 - int xbigj, ybigj, xlast, ylast; /* jumpiness detection */ 47 - int xsaw_secondary, ysaw_secondary; /* jumpiness detection */ 48 - }; 49 - 50 - int hgpk_detect(struct psmouse *psmouse, bool set_properties); 51 - int hgpk_init(struct psmouse *psmouse); 52 - 53 - #ifdef CONFIG_MOUSE_PS2_OLPC 54 - void hgpk_module_init(void); 55 - #else 56 - static inline void hgpk_module_init(void) 57 - { 58 - } 59 - #endif 60 - 61 - #endif
+1 -20
drivers/input/mouse/psmouse-base.c
··· 26 26 #include "synaptics.h" 27 27 #include "logips2pp.h" 28 28 #include "alps.h" 29 - #include "hgpk.h" 30 29 #include "lifebook.h" 31 30 #include "trackpoint.h" 32 31 #include "touchkit_ps2.h" ··· 392 393 return; 393 394 } 394 395 395 - if (psmouse->packet[1] == PSMOUSE_RET_ID || 396 - (psmouse->protocol->type == PSMOUSE_HGPK && 397 - psmouse->packet[1] == PSMOUSE_RET_BAT)) { 396 + if (psmouse->packet[1] == PSMOUSE_RET_ID) { 398 397 __psmouse_set_state(psmouse, PSMOUSE_IGNORE); 399 398 serio_reconnect(ps2dev->serio); 400 399 return; ··· 834 837 .detect = touchkit_ps2_detect, 835 838 }, 836 839 #endif 837 - #ifdef CONFIG_MOUSE_PS2_OLPC 838 - { 839 - .type = PSMOUSE_HGPK, 840 - .name = "OLPC HGPK", 841 - .alias = "hgpk", 842 - .detect = hgpk_detect, 843 - }, 844 - #endif 845 840 #ifdef CONFIG_MOUSE_PS2_ELANTECH 846 841 { 847 842 .type = PSMOUSE_ELANTECH, ··· 1140 1151 if (psmouse_try_protocol(psmouse, PSMOUSE_ALPS, 1141 1152 &max_proto, set_properties, true)) 1142 1153 return PSMOUSE_ALPS; 1143 - } 1144 - 1145 - /* Try OLPC HGPK touchpad */ 1146 - if (max_proto > PSMOUSE_IMEX && 1147 - psmouse_try_protocol(psmouse, PSMOUSE_HGPK, &max_proto, 1148 - set_properties, true)) { 1149 - return PSMOUSE_HGPK; 1150 1154 } 1151 1155 1152 1156 /* Try Elantech touchpad */ ··· 2017 2035 2018 2036 lifebook_module_init(); 2019 2037 synaptics_module_init(); 2020 - hgpk_module_init(); 2021 2038 2022 2039 err = psmouse_smbus_module_init(); 2023 2040 if (err)
+1 -1
drivers/input/mouse/psmouse.h
··· 59 59 PSMOUSE_TRACKPOINT, 60 60 PSMOUSE_TOUCHKIT_PS2, 61 61 PSMOUSE_CORTRON, 62 - PSMOUSE_HGPK, 62 + PSMOUSE_HGPK, /* No longer used */ 63 63 PSMOUSE_ELANTECH, 64 64 PSMOUSE_FSP, 65 65 PSMOUSE_SYNAPTICS_RELATIVE,