1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 2020, 2022 Vladimir Kondratyev <wulf@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 /* 29 * Elan I2C Touchpad driver. Based on Linux driver. 30 * https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/input/mouse/elan_i2c_core.c 31 */ 32 33 #include <sys/param.h> 34 #include <sys/bus.h> 35 #include <sys/endian.h> 36 #include <sys/kernel.h> 37 #include <sys/lock.h> 38 #include <sys/malloc.h> 39 #include <sys/module.h> 40 #include <sys/mutex.h> 41 #include <sys/sysctl.h> 42 #include <sys/systm.h> 43 44 #include <dev/evdev/evdev.h> 45 #include <dev/evdev/input.h> 46 47 #include <dev/iicbus/iic.h> 48 #include <dev/iicbus/iicbus.h> 49 50 #define HID_DEBUG_VAR ietp_debug 51 #include <dev/hid/hid.h> 52 #include <dev/hid/hidbus.h> 53 #include <dev/hid/hidquirk.h> 54 55 #ifdef HID_DEBUG 56 static SYSCTL_NODE(_hw_hid, OID_AUTO, ietp, CTLFLAG_RW, 0, 57 "Elantech Touchpad"); 58 static int ietp_debug = 1; 59 SYSCTL_INT(_hw_hid_ietp, OID_AUTO, debug, CTLFLAG_RWTUN, 60 &ietp_debug, 1, "Debug level"); 61 #endif 62 63 #define IETP_PATTERN 0x0100 64 #define IETP_UNIQUEID 0x0101 65 #define IETP_FW_VERSION 0x0102 66 #define IETP_IC_TYPE 0x0103 67 #define IETP_OSM_VERSION 0x0103 68 #define IETP_NSM_VERSION 0x0104 69 #define IETP_TRACENUM 0x0105 70 #define IETP_MAX_X_AXIS 0x0106 71 #define IETP_MAX_Y_AXIS 0x0107 72 #define IETP_RESOLUTION 0x0108 73 #define IETP_PRESSURE 0x010A 74 75 #define IETP_CONTROL 0x0300 76 #define IETP_CTRL_ABSOLUTE 0x0001 77 #define IETP_CTRL_STANDARD 0x0000 78 79 #define IETP_REPORT_LEN_LO 32 80 #define IETP_REPORT_LEN_HI 37 81 #define IETP_MAX_FINGERS 5 82 83 #define IETP_REPORT_ID_LO 0x5D 84 #define IETP_REPORT_ID_HI 0x60 85 86 #define IETP_TOUCH_INFO 1 87 #define IETP_FINGER_DATA 2 88 #define IETP_FINGER_DATA_LEN 5 89 #define IETP_HOVER_INFO 28 90 #define IETP_WH_DATA 31 91 92 #define IETP_TOUCH_LMB (1 << 0) 93 #define IETP_TOUCH_RMB (1 << 1) 94 #define IETP_TOUCH_MMB (1 << 2) 95 96 #define IETP_MAX_PRESSURE 255 97 #define IETP_FWIDTH_REDUCE 90 98 #define IETP_FINGER_MAX_WIDTH 15 99 #define IETP_PRESSURE_BASE 25 100 101 struct ietp_softc { 102 device_t dev; 103 104 struct evdev_dev *evdev; 105 uint8_t report_id; 106 hid_size_t report_len; 107 108 uint16_t product_id; 109 uint16_t ic_type; 110 111 int32_t pressure_base; 112 uint16_t max_x; 113 uint16_t max_y; 114 uint16_t trace_x; 115 uint16_t trace_y; 116 uint16_t res_x; /* dots per mm */ 117 uint16_t res_y; 118 bool hi_precision; 119 bool is_clickpad; 120 bool has_3buttons; 121 }; 122 123 static evdev_open_t ietp_ev_open; 124 static evdev_close_t ietp_ev_close; 125 static hid_intr_t ietp_intr; 126 127 static int ietp_probe(struct ietp_softc *); 128 static int ietp_attach(struct ietp_softc *); 129 static int ietp_detach(struct ietp_softc *); 130 static int32_t ietp_res2dpmm(uint8_t, bool); 131 132 static device_identify_t ietp_iic_identify; 133 static device_probe_t ietp_iic_probe; 134 static device_attach_t ietp_iic_attach; 135 static device_detach_t ietp_iic_detach; 136 static device_resume_t ietp_iic_resume; 137 138 static int ietp_iic_read_reg(device_t, uint16_t, size_t, void *); 139 static int ietp_iic_write_reg(device_t, uint16_t, uint16_t); 140 static int ietp_iic_set_absolute_mode(device_t, bool); 141 142 #define IETP_IIC_DEV(pnp) \ 143 { HID_TLC(HUP_GENERIC_DESKTOP, HUG_MOUSE), HID_BUS(BUS_I2C), HID_PNP(pnp) } 144 145 static const struct hid_device_id ietp_iic_devs[] = { 146 IETP_IIC_DEV("ELAN0000"), 147 IETP_IIC_DEV("ELAN0100"), 148 IETP_IIC_DEV("ELAN0600"), 149 IETP_IIC_DEV("ELAN0601"), 150 IETP_IIC_DEV("ELAN0602"), 151 IETP_IIC_DEV("ELAN0603"), 152 IETP_IIC_DEV("ELAN0604"), 153 IETP_IIC_DEV("ELAN0605"), 154 IETP_IIC_DEV("ELAN0606"), 155 IETP_IIC_DEV("ELAN0607"), 156 IETP_IIC_DEV("ELAN0608"), 157 IETP_IIC_DEV("ELAN0609"), 158 IETP_IIC_DEV("ELAN060B"), 159 IETP_IIC_DEV("ELAN060C"), 160 IETP_IIC_DEV("ELAN060F"), 161 IETP_IIC_DEV("ELAN0610"), 162 IETP_IIC_DEV("ELAN0611"), 163 IETP_IIC_DEV("ELAN0612"), 164 IETP_IIC_DEV("ELAN0615"), 165 IETP_IIC_DEV("ELAN0616"), 166 IETP_IIC_DEV("ELAN0617"), 167 IETP_IIC_DEV("ELAN0618"), 168 IETP_IIC_DEV("ELAN0619"), 169 IETP_IIC_DEV("ELAN061A"), 170 IETP_IIC_DEV("ELAN061B"), 171 IETP_IIC_DEV("ELAN061C"), 172 IETP_IIC_DEV("ELAN061D"), 173 IETP_IIC_DEV("ELAN061E"), 174 IETP_IIC_DEV("ELAN061F"), 175 IETP_IIC_DEV("ELAN0620"), 176 IETP_IIC_DEV("ELAN0621"), 177 IETP_IIC_DEV("ELAN0622"), 178 IETP_IIC_DEV("ELAN0623"), 179 IETP_IIC_DEV("ELAN0624"), 180 IETP_IIC_DEV("ELAN0625"), 181 IETP_IIC_DEV("ELAN0626"), 182 IETP_IIC_DEV("ELAN0627"), 183 IETP_IIC_DEV("ELAN0628"), 184 IETP_IIC_DEV("ELAN0629"), 185 IETP_IIC_DEV("ELAN062A"), 186 IETP_IIC_DEV("ELAN062B"), 187 IETP_IIC_DEV("ELAN062C"), 188 IETP_IIC_DEV("ELAN062D"), 189 IETP_IIC_DEV("ELAN062E"), /* Lenovo V340 Whiskey Lake U */ 190 IETP_IIC_DEV("ELAN062F"), /* Lenovo V340 Comet Lake U */ 191 IETP_IIC_DEV("ELAN0631"), 192 IETP_IIC_DEV("ELAN0632"), 193 IETP_IIC_DEV("ELAN0633"), /* Lenovo S145 */ 194 IETP_IIC_DEV("ELAN0634"), /* Lenovo V340 Ice lake */ 195 IETP_IIC_DEV("ELAN0635"), /* Lenovo V1415-IIL */ 196 IETP_IIC_DEV("ELAN0636"), /* Lenovo V1415-Dali */ 197 IETP_IIC_DEV("ELAN0637"), /* Lenovo V1415-IGLR */ 198 IETP_IIC_DEV("ELAN1000"), 199 }; 200 201 static uint8_t const ietp_dummy_rdesc[] = { 202 0x05, HUP_GENERIC_DESKTOP, /* Usage Page (Generic Desktop Ctrls) */ 203 0x09, HUG_MOUSE, /* Usage (Mouse) */ 204 0xA1, 0x01, /* Collection (Application) */ 205 0x09, 0x01, /* Usage (0x01) */ 206 0x95, IETP_REPORT_LEN_LO, /* Report Count (IETP_REPORT_LEN_LO) */ 207 0x75, 0x08, /* Report Size (8) */ 208 0x81, 0x02, /* Input (Data,Var,Abs) */ 209 0xC0, /* End Collection */ 210 }; 211 212 static const struct evdev_methods ietp_evdev_methods = { 213 .ev_open = &ietp_ev_open, 214 .ev_close = &ietp_ev_close, 215 }; 216 217 static int 218 ietp_ev_open(struct evdev_dev *evdev) 219 { 220 return (hid_intr_start(evdev_get_softc(evdev))); 221 } 222 223 static int 224 ietp_ev_close(struct evdev_dev *evdev) 225 { 226 return (hid_intr_stop(evdev_get_softc(evdev))); 227 } 228 229 static int 230 ietp_probe(struct ietp_softc *sc) 231 { 232 if (hidbus_find_child(device_get_parent(sc->dev), 233 HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD)) != NULL) { 234 DPRINTFN(5, "Ignore HID-compatible touchpad on %s\n", 235 device_get_nameunit(device_get_parent(sc->dev))); 236 return (ENXIO); 237 } 238 239 device_set_desc(sc->dev, "Elan Touchpad"); 240 241 return (BUS_PROBE_DEFAULT); 242 } 243 244 static int 245 ietp_attach(struct ietp_softc *sc) 246 { 247 const struct hid_device_info *hw = hid_get_device_info(sc->dev); 248 void *d_ptr; 249 hid_size_t d_len; 250 int32_t minor, major; 251 int error; 252 253 sc->report_id = sc->hi_precision ? 254 IETP_REPORT_ID_HI : IETP_REPORT_ID_LO; 255 sc->report_len = sc->hi_precision ? 256 IETP_REPORT_LEN_HI : IETP_REPORT_LEN_LO; 257 258 /* Try to detect 3-rd button by relative mouse TLC */ 259 if (!sc->is_clickpad) { 260 error = hid_get_report_descr(sc->dev, &d_ptr, &d_len); 261 if (error != 0) { 262 device_printf(sc->dev, "could not retrieve report " 263 "descriptor from device: %d\n", error); 264 return (ENXIO); 265 } 266 if (hidbus_locate(d_ptr, d_len, HID_USAGE2(HUP_BUTTON, 3), 267 hid_input, hidbus_get_index(sc->dev), 0, NULL, NULL, NULL, 268 NULL)) 269 sc->has_3buttons = true; 270 } 271 272 sc->evdev = evdev_alloc(); 273 evdev_set_name(sc->evdev, device_get_desc(sc->dev)); 274 evdev_set_phys(sc->evdev, device_get_nameunit(sc->dev)); 275 evdev_set_id(sc->evdev, hw->idBus, hw->idVendor, hw->idProduct, 276 hw->idVersion); 277 evdev_set_serial(sc->evdev, hw->serial); 278 evdev_set_methods(sc->evdev, sc->dev, &ietp_evdev_methods); 279 evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_STCOMPAT); 280 evdev_set_flag(sc->evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */ 281 282 evdev_support_event(sc->evdev, EV_SYN); 283 evdev_support_event(sc->evdev, EV_ABS); 284 evdev_support_event(sc->evdev, EV_KEY); 285 evdev_support_prop(sc->evdev, INPUT_PROP_POINTER); 286 evdev_support_key(sc->evdev, BTN_LEFT); 287 if (sc->is_clickpad) { 288 evdev_support_prop(sc->evdev, INPUT_PROP_BUTTONPAD); 289 } else { 290 evdev_support_key(sc->evdev, BTN_RIGHT); 291 if (sc->has_3buttons) 292 evdev_support_key(sc->evdev, BTN_MIDDLE); 293 } 294 295 major = IETP_FINGER_MAX_WIDTH * MAX(sc->trace_x, sc->trace_y); 296 minor = IETP_FINGER_MAX_WIDTH * MIN(sc->trace_x, sc->trace_y); 297 298 evdev_support_abs(sc->evdev, ABS_MT_SLOT, 299 0, IETP_MAX_FINGERS - 1, 0, 0, 0); 300 evdev_support_abs(sc->evdev, ABS_MT_TRACKING_ID, 301 -1, IETP_MAX_FINGERS - 1, 0, 0, 0); 302 evdev_support_abs(sc->evdev, ABS_MT_POSITION_X, 303 0, sc->max_x, 0, 0, sc->res_x); 304 evdev_support_abs(sc->evdev, ABS_MT_POSITION_Y, 305 0, sc->max_y, 0, 0, sc->res_y); 306 evdev_support_abs(sc->evdev, ABS_MT_PRESSURE, 307 0, IETP_MAX_PRESSURE, 0, 0, 0); 308 evdev_support_abs(sc->evdev, ABS_MT_ORIENTATION, 0, 1, 0, 0, 0); 309 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MAJOR, 0, major, 0, 0, 0); 310 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MINOR, 0, minor, 0, 0, 0); 311 evdev_support_abs(sc->evdev, ABS_DISTANCE, 0, 1, 0, 0, 0); 312 313 error = evdev_register(sc->evdev); 314 if (error != 0) { 315 ietp_detach(sc); 316 return (ENOMEM); 317 } 318 319 hidbus_set_intr(sc->dev, ietp_intr, sc); 320 321 device_printf(sc->dev, "[%d:%d], %s\n", sc->max_x, sc->max_y, 322 sc->is_clickpad ? "clickpad" : 323 sc->has_3buttons ? "3 buttons" : "2 buttons"); 324 325 return (0); 326 } 327 328 static int 329 ietp_detach(struct ietp_softc *sc) 330 { 331 evdev_free(sc->evdev); 332 333 return (0); 334 } 335 336 static void 337 ietp_intr(void *context, void *buf, hid_size_t len) 338 { 339 struct ietp_softc *sc = context; 340 union evdev_mt_slot slot_data; 341 uint8_t *report, *fdata; 342 int32_t finger; 343 int32_t x, y, w, h, wh; 344 345 /* we seem to get 0 length reports sometimes, ignore them */ 346 if (len == 0) 347 return; 348 if (len != sc->report_len) { 349 DPRINTF("wrong report length (%d vs %d expected)", len, sc->report_len); 350 return; 351 } 352 353 report = buf; 354 if (*report != sc->report_id) 355 return; 356 357 evdev_push_key(sc->evdev, BTN_LEFT, 358 report[IETP_TOUCH_INFO] & IETP_TOUCH_LMB); 359 evdev_push_key(sc->evdev, BTN_MIDDLE, 360 report[IETP_TOUCH_INFO] & IETP_TOUCH_MMB); 361 evdev_push_key(sc->evdev, BTN_RIGHT, 362 report[IETP_TOUCH_INFO] & IETP_TOUCH_RMB); 363 evdev_push_abs(sc->evdev, ABS_DISTANCE, 364 (report[IETP_HOVER_INFO] & 0x40) >> 6); 365 366 for (finger = 0, fdata = report + IETP_FINGER_DATA; 367 finger < IETP_MAX_FINGERS; 368 finger++, fdata += IETP_FINGER_DATA_LEN) { 369 if ((report[IETP_TOUCH_INFO] & (1 << (finger + 3))) != 0) { 370 if (sc->hi_precision) { 371 x = fdata[0] << 8 | fdata[1]; 372 y = fdata[2] << 8 | fdata[3]; 373 wh = report[IETP_WH_DATA + finger]; 374 } else { 375 x = (fdata[0] & 0xf0) << 4 | fdata[1]; 376 y = (fdata[0] & 0x0f) << 8 | fdata[2]; 377 wh = fdata[3]; 378 } 379 380 if (x > sc->max_x || y > sc->max_y) { 381 DPRINTF("[%d] x=%d y=%d over max (%d, %d)", 382 finger, x, y, sc->max_x, sc->max_y); 383 continue; 384 } 385 386 /* Reduce trace size to not treat large finger as palm */ 387 w = (wh & 0x0F) * (sc->trace_x - IETP_FWIDTH_REDUCE); 388 h = (wh >> 4) * (sc->trace_y - IETP_FWIDTH_REDUCE); 389 390 slot_data = (union evdev_mt_slot) { 391 .id = finger, 392 .x = x, 393 .y = sc->max_y - y, 394 .p = MIN((int32_t)fdata[4] + sc->pressure_base, 395 IETP_MAX_PRESSURE), 396 .ori = w > h ? 1 : 0, 397 .maj = MAX(w, h), 398 .min = MIN(w, h), 399 }; 400 evdev_mt_push_slot(sc->evdev, finger, &slot_data); 401 } else { 402 evdev_push_abs(sc->evdev, ABS_MT_SLOT, finger); 403 evdev_push_abs(sc->evdev, ABS_MT_TRACKING_ID, -1); 404 } 405 } 406 407 evdev_sync(sc->evdev); 408 } 409 410 static int32_t 411 ietp_res2dpmm(uint8_t res, bool hi_precision) 412 { 413 int32_t dpi; 414 415 dpi = hi_precision ? 300 + res * 100 : 790 + res * 10; 416 417 return (dpi * 10 /254); 418 } 419 420 static void 421 ietp_iic_identify(driver_t *driver, device_t parent) 422 { 423 void *d_ptr; 424 hid_size_t d_len; 425 int isize; 426 uint8_t iid; 427 428 if (HIDBUS_LOOKUP_ID(parent, ietp_iic_devs) == NULL) 429 return; 430 if (hid_get_report_descr(parent, &d_ptr, &d_len) != 0) 431 return; 432 433 /* 434 * Some Elantech trackpads have a mangled HID report descriptor, which 435 * reads as having an incorrect input size (i.e. < IETP_REPORT_LEN_LO). 436 * If the input size is incorrect, load a dummy report descriptor. 437 */ 438 439 isize = hid_report_size_max(d_ptr, d_len, hid_input, &iid); 440 if (isize >= IETP_REPORT_LEN_LO) 441 return; 442 443 hid_set_report_descr(parent, ietp_dummy_rdesc, 444 sizeof(ietp_dummy_rdesc)); 445 } 446 447 static int 448 ietp_iic_probe(device_t dev) 449 { 450 struct ietp_softc *sc = device_get_softc(dev); 451 device_t iichid; 452 int error; 453 454 error = HIDBUS_LOOKUP_DRIVER_INFO(dev, ietp_iic_devs); 455 if (error != 0) 456 return (error); 457 458 iichid = device_get_parent(device_get_parent(dev)); 459 if (device_get_devclass(iichid) != devclass_find("iichid")) 460 return (ENXIO); 461 462 sc->dev = dev; 463 464 return (ietp_probe(sc)); 465 } 466 467 static int 468 ietp_iic_attach(device_t dev) 469 { 470 struct ietp_softc *sc = device_get_softc(dev); 471 uint16_t buf, reg; 472 uint8_t *buf8; 473 uint8_t pattern; 474 475 buf8 = (uint8_t *)&buf; 476 477 if (ietp_iic_read_reg(dev, IETP_UNIQUEID, sizeof(buf), &buf) != 0) { 478 device_printf(sc->dev, "failed reading product ID\n"); 479 return (EIO); 480 } 481 sc->product_id = le16toh(buf); 482 483 if (ietp_iic_read_reg(dev, IETP_PATTERN, sizeof(buf), &buf) != 0) { 484 device_printf(sc->dev, "failed reading pattern\n"); 485 return (EIO); 486 } 487 pattern = buf == 0xFFFF ? 0 : buf8[1]; 488 sc->hi_precision = pattern >= 0x02; 489 490 reg = pattern >= 0x01 ? IETP_IC_TYPE : IETP_OSM_VERSION; 491 if (ietp_iic_read_reg(dev, reg, sizeof(buf), &buf) != 0) { 492 device_printf(sc->dev, "failed reading IC type\n"); 493 return (EIO); 494 } 495 sc->ic_type = pattern >= 0x01 ? be16toh(buf) : buf8[1]; 496 497 if (ietp_iic_read_reg(dev, IETP_NSM_VERSION, sizeof(buf), &buf) != 0) { 498 device_printf(sc->dev, "failed reading SM version\n"); 499 return (EIO); 500 } 501 sc->is_clickpad = (buf8[0] & 0x10) != 0; 502 503 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 504 device_printf(sc->dev, "failed to set absolute mode\n"); 505 return (EIO); 506 } 507 508 if (ietp_iic_read_reg(dev, IETP_MAX_X_AXIS, sizeof(buf), &buf) != 0) { 509 device_printf(sc->dev, "failed reading max x\n"); 510 return (EIO); 511 } 512 sc->max_x = le16toh(buf); 513 514 if (ietp_iic_read_reg(dev, IETP_MAX_Y_AXIS, sizeof(buf), &buf) != 0) { 515 device_printf(sc->dev, "failed reading max y\n"); 516 return (EIO); 517 } 518 sc->max_y = le16toh(buf); 519 520 if (ietp_iic_read_reg(dev, IETP_TRACENUM, sizeof(buf), &buf) != 0) { 521 device_printf(sc->dev, "failed reading trace info\n"); 522 return (EIO); 523 } 524 sc->trace_x = sc->max_x / buf8[0]; 525 sc->trace_y = sc->max_y / buf8[1]; 526 527 if (ietp_iic_read_reg(dev, IETP_PRESSURE, sizeof(buf), &buf) != 0) { 528 device_printf(sc->dev, "failed reading pressure format\n"); 529 return (EIO); 530 } 531 sc->pressure_base = (buf8[0] & 0x10) ? 0 : IETP_PRESSURE_BASE; 532 533 if (ietp_iic_read_reg(dev, IETP_RESOLUTION, sizeof(buf), &buf) != 0) { 534 device_printf(sc->dev, "failed reading resolution\n"); 535 return (EIO); 536 } 537 /* Conversion from internal format to dot per mm */ 538 sc->res_x = ietp_res2dpmm(buf8[0], sc->hi_precision); 539 sc->res_y = ietp_res2dpmm(buf8[1], sc->hi_precision); 540 541 return (ietp_attach(sc)); 542 } 543 544 static int 545 ietp_iic_detach(device_t dev) 546 { 547 struct ietp_softc *sc = device_get_softc(dev); 548 549 if (ietp_iic_set_absolute_mode(dev, false) != 0) 550 device_printf(dev, "failed setting standard mode\n"); 551 552 return (ietp_detach(sc)); 553 } 554 555 static int 556 ietp_iic_resume(device_t dev) 557 { 558 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 559 device_printf(dev, "reset when resuming failed: \n"); 560 return (EIO); 561 } 562 563 return (0); 564 } 565 566 static int 567 ietp_iic_set_absolute_mode(device_t dev, bool enable) 568 { 569 struct ietp_softc *sc = device_get_softc(dev); 570 static const struct { 571 uint16_t ic_type; 572 uint16_t product_id; 573 } special_fw[] = { 574 { 0x0E, 0x05 }, { 0x0E, 0x06 }, { 0x0E, 0x07 }, { 0x0E, 0x09 }, 575 { 0x0E, 0x13 }, { 0x08, 0x26 }, 576 }; 577 uint16_t val; 578 int i, error; 579 bool require_wakeup; 580 581 error = 0; 582 583 /* 584 * Some ASUS touchpads need to be powered on to enter absolute mode. 585 */ 586 require_wakeup = false; 587 for (i = 0; i < nitems(special_fw); i++) { 588 if (sc->ic_type == special_fw[i].ic_type && 589 sc->product_id == special_fw[i].product_id) { 590 require_wakeup = true; 591 break; 592 } 593 } 594 595 if (require_wakeup && hid_intr_start(dev) != 0) { 596 device_printf(dev, "failed writing poweron command\n"); 597 return (EIO); 598 } 599 600 val = enable ? IETP_CTRL_ABSOLUTE : IETP_CTRL_STANDARD; 601 if (ietp_iic_write_reg(dev, IETP_CONTROL, val) != 0) { 602 device_printf(dev, "failed setting absolute mode\n"); 603 error = EIO; 604 } 605 606 if (require_wakeup && hid_intr_stop(dev) != 0) { 607 device_printf(dev, "failed writing poweroff command\n"); 608 error = EIO; 609 } 610 611 return (error); 612 } 613 614 static int 615 ietp_iic_read_reg(device_t dev, uint16_t reg, size_t len, void *val) 616 { 617 device_t iichid = device_get_parent(device_get_parent(dev)); 618 uint16_t addr = iicbus_get_addr(iichid) << 1; 619 uint8_t cmd[2] = { reg & 0xff, (reg >> 8) & 0xff }; 620 struct iic_msg msgs[2] = { 621 { addr, IIC_M_WR | IIC_M_NOSTOP, sizeof(cmd), cmd }, 622 { addr, IIC_M_RD, len, val }, 623 }; 624 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 625 int error; 626 627 DPRINTF("Read reg 0x%04x with size %zu\n", reg, len); 628 629 error = hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird); 630 if (error != 0) 631 return (error); 632 633 DPRINTF("Response: %*D\n", (int)len, val, " "); 634 635 return (0); 636 } 637 638 static int 639 ietp_iic_write_reg(device_t dev, uint16_t reg, uint16_t val) 640 { 641 device_t iichid = device_get_parent(device_get_parent(dev)); 642 uint16_t addr = iicbus_get_addr(iichid) << 1; 643 uint8_t cmd[4] = { reg & 0xff, (reg >> 8) & 0xff, 644 val & 0xff, (val >> 8) & 0xff }; 645 struct iic_msg msgs[1] = { 646 { addr, IIC_M_WR, sizeof(cmd), cmd }, 647 }; 648 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 649 650 DPRINTF("Write reg 0x%04x with value 0x%04x\n", reg, val); 651 652 return (hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird)); 653 } 654 655 static device_method_t ietp_methods[] = { 656 DEVMETHOD(device_identify, ietp_iic_identify), 657 DEVMETHOD(device_probe, ietp_iic_probe), 658 DEVMETHOD(device_attach, ietp_iic_attach), 659 DEVMETHOD(device_detach, ietp_iic_detach), 660 DEVMETHOD(device_resume, ietp_iic_resume), 661 DEVMETHOD_END 662 }; 663 664 static driver_t ietp_driver = { 665 .name = "ietp", 666 .methods = ietp_methods, 667 .size = sizeof(struct ietp_softc), 668 }; 669 670 DRIVER_MODULE(ietp, hidbus, ietp_driver, NULL, NULL); 671 MODULE_DEPEND(ietp, hidbus, 1, 1, 1); 672 MODULE_DEPEND(ietp, hid, 1, 1, 1); 673 MODULE_DEPEND(ietp, evdev, 1, 1, 1); 674 MODULE_VERSION(ietp, 1); 675 HID_PNP_INFO(ietp_iic_devs); 676