1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 #include <sys/param.h> 37 #include <sys/bus.h> 38 #include <sys/endian.h> 39 #include <sys/kernel.h> 40 #include <sys/lock.h> 41 #include <sys/malloc.h> 42 #include <sys/module.h> 43 #include <sys/mutex.h> 44 #include <sys/sysctl.h> 45 #include <sys/systm.h> 46 47 #include <dev/evdev/evdev.h> 48 #include <dev/evdev/input.h> 49 50 #include <dev/iicbus/iic.h> 51 #include <dev/iicbus/iicbus.h> 52 53 #define HID_DEBUG_VAR ietp_debug 54 #include <dev/hid/hid.h> 55 #include <dev/hid/hidbus.h> 56 #include <dev/hid/hidquirk.h> 57 58 #ifdef HID_DEBUG 59 static SYSCTL_NODE(_hw_hid, OID_AUTO, ietp, CTLFLAG_RW, 0, 60 "Elantech Touchpad"); 61 static int ietp_debug = 1; 62 SYSCTL_INT(_hw_hid_ietp, OID_AUTO, debug, CTLFLAG_RWTUN, 63 &ietp_debug, 1, "Debug level"); 64 #endif 65 66 #define IETP_PATTERN 0x0100 67 #define IETP_UNIQUEID 0x0101 68 #define IETP_FW_VERSION 0x0102 69 #define IETP_IC_TYPE 0x0103 70 #define IETP_OSM_VERSION 0x0103 71 #define IETP_NSM_VERSION 0x0104 72 #define IETP_TRACENUM 0x0105 73 #define IETP_MAX_X_AXIS 0x0106 74 #define IETP_MAX_Y_AXIS 0x0107 75 #define IETP_RESOLUTION 0x0108 76 #define IETP_PRESSURE 0x010A 77 78 #define IETP_CONTROL 0x0300 79 #define IETP_CTRL_ABSOLUTE 0x0001 80 #define IETP_CTRL_STANDARD 0x0000 81 82 #define IETP_REPORT_LEN_LO 32 83 #define IETP_REPORT_LEN_HI 37 84 #define IETP_MAX_FINGERS 5 85 86 #define IETP_REPORT_ID_LO 0x5D 87 #define IETP_REPORT_ID_HI 0x60 88 89 #define IETP_TOUCH_INFO 1 90 #define IETP_FINGER_DATA 2 91 #define IETP_FINGER_DATA_LEN 5 92 #define IETP_HOVER_INFO 28 93 #define IETP_WH_DATA 31 94 95 #define IETP_TOUCH_LMB (1 << 0) 96 #define IETP_TOUCH_RMB (1 << 1) 97 #define IETP_TOUCH_MMB (1 << 2) 98 99 #define IETP_MAX_PRESSURE 255 100 #define IETP_FWIDTH_REDUCE 90 101 #define IETP_FINGER_MAX_WIDTH 15 102 #define IETP_PRESSURE_BASE 25 103 104 struct ietp_softc { 105 device_t dev; 106 107 struct evdev_dev *evdev; 108 uint8_t report_id; 109 hid_size_t report_len; 110 111 uint16_t product_id; 112 uint16_t ic_type; 113 114 int32_t pressure_base; 115 uint16_t max_x; 116 uint16_t max_y; 117 uint16_t trace_x; 118 uint16_t trace_y; 119 uint16_t res_x; /* dots per mm */ 120 uint16_t res_y; 121 bool hi_precision; 122 bool is_clickpad; 123 bool has_3buttons; 124 }; 125 126 static evdev_open_t ietp_ev_open; 127 static evdev_close_t ietp_ev_close; 128 static hid_intr_t ietp_intr; 129 130 static int ietp_probe(struct ietp_softc *); 131 static int ietp_attach(struct ietp_softc *); 132 static int ietp_detach(struct ietp_softc *); 133 static int32_t ietp_res2dpmm(uint8_t, bool); 134 135 static device_identify_t ietp_iic_identify; 136 static device_probe_t ietp_iic_probe; 137 static device_attach_t ietp_iic_attach; 138 static device_detach_t ietp_iic_detach; 139 static device_resume_t ietp_iic_resume; 140 141 static int ietp_iic_read_reg(device_t, uint16_t, size_t, void *); 142 static int ietp_iic_write_reg(device_t, uint16_t, uint16_t); 143 static int ietp_iic_set_absolute_mode(device_t, bool); 144 145 #define IETP_IIC_DEV(pnp) \ 146 { HID_TLC(HUP_GENERIC_DESKTOP, HUG_MOUSE), HID_BUS(BUS_I2C), HID_PNP(pnp) } 147 148 static const struct hid_device_id ietp_iic_devs[] = { 149 IETP_IIC_DEV("ELAN0000"), 150 IETP_IIC_DEV("ELAN0100"), 151 IETP_IIC_DEV("ELAN0600"), 152 IETP_IIC_DEV("ELAN0601"), 153 IETP_IIC_DEV("ELAN0602"), 154 IETP_IIC_DEV("ELAN0603"), 155 IETP_IIC_DEV("ELAN0604"), 156 IETP_IIC_DEV("ELAN0605"), 157 IETP_IIC_DEV("ELAN0606"), 158 IETP_IIC_DEV("ELAN0607"), 159 IETP_IIC_DEV("ELAN0608"), 160 IETP_IIC_DEV("ELAN0609"), 161 IETP_IIC_DEV("ELAN060B"), 162 IETP_IIC_DEV("ELAN060C"), 163 IETP_IIC_DEV("ELAN060F"), 164 IETP_IIC_DEV("ELAN0610"), 165 IETP_IIC_DEV("ELAN0611"), 166 IETP_IIC_DEV("ELAN0612"), 167 IETP_IIC_DEV("ELAN0615"), 168 IETP_IIC_DEV("ELAN0616"), 169 IETP_IIC_DEV("ELAN0617"), 170 IETP_IIC_DEV("ELAN0618"), 171 IETP_IIC_DEV("ELAN0619"), 172 IETP_IIC_DEV("ELAN061A"), 173 IETP_IIC_DEV("ELAN061B"), 174 IETP_IIC_DEV("ELAN061C"), 175 IETP_IIC_DEV("ELAN061D"), 176 IETP_IIC_DEV("ELAN061E"), 177 IETP_IIC_DEV("ELAN061F"), 178 IETP_IIC_DEV("ELAN0620"), 179 IETP_IIC_DEV("ELAN0621"), 180 IETP_IIC_DEV("ELAN0622"), 181 IETP_IIC_DEV("ELAN0623"), 182 IETP_IIC_DEV("ELAN0624"), 183 IETP_IIC_DEV("ELAN0625"), 184 IETP_IIC_DEV("ELAN0626"), 185 IETP_IIC_DEV("ELAN0627"), 186 IETP_IIC_DEV("ELAN0628"), 187 IETP_IIC_DEV("ELAN0629"), 188 IETP_IIC_DEV("ELAN062A"), 189 IETP_IIC_DEV("ELAN062B"), 190 IETP_IIC_DEV("ELAN062C"), 191 IETP_IIC_DEV("ELAN062D"), 192 IETP_IIC_DEV("ELAN062E"), /* Lenovo V340 Whiskey Lake U */ 193 IETP_IIC_DEV("ELAN062F"), /* Lenovo V340 Comet Lake U */ 194 IETP_IIC_DEV("ELAN0631"), 195 IETP_IIC_DEV("ELAN0632"), 196 IETP_IIC_DEV("ELAN0633"), /* Lenovo S145 */ 197 IETP_IIC_DEV("ELAN0634"), /* Lenovo V340 Ice lake */ 198 IETP_IIC_DEV("ELAN0635"), /* Lenovo V1415-IIL */ 199 IETP_IIC_DEV("ELAN0636"), /* Lenovo V1415-Dali */ 200 IETP_IIC_DEV("ELAN0637"), /* Lenovo V1415-IGLR */ 201 IETP_IIC_DEV("ELAN1000"), 202 }; 203 204 static uint8_t const ietp_dummy_rdesc[] = { 205 0x05, HUP_GENERIC_DESKTOP, /* Usage Page (Generic Desktop Ctrls) */ 206 0x09, HUG_MOUSE, /* Usage (Mouse) */ 207 0xA1, 0x01, /* Collection (Application) */ 208 0x09, 0x01, /* Usage (0x01) */ 209 0x95, IETP_REPORT_LEN_LO, /* Report Count (IETP_REPORT_LEN_LO) */ 210 0x75, 0x08, /* Report Size (8) */ 211 0x81, 0x02, /* Input (Data,Var,Abs) */ 212 0xC0, /* End Collection */ 213 }; 214 215 static const struct evdev_methods ietp_evdev_methods = { 216 .ev_open = &ietp_ev_open, 217 .ev_close = &ietp_ev_close, 218 }; 219 220 static int 221 ietp_ev_open(struct evdev_dev *evdev) 222 { 223 return (hidbus_intr_start(evdev_get_softc(evdev))); 224 } 225 226 static int 227 ietp_ev_close(struct evdev_dev *evdev) 228 { 229 return (hidbus_intr_stop(evdev_get_softc(evdev))); 230 } 231 232 static int 233 ietp_probe(struct ietp_softc *sc) 234 { 235 if (hidbus_find_child(device_get_parent(sc->dev), 236 HID_USAGE2(HUP_DIGITIZERS, HUD_TOUCHPAD)) != NULL) { 237 DPRINTFN(5, "Ignore HID-compatible touchpad on %s\n", 238 device_get_nameunit(device_get_parent(sc->dev))); 239 return (ENXIO); 240 } 241 242 device_set_desc(sc->dev, "Elan Touchpad"); 243 244 return (BUS_PROBE_DEFAULT); 245 } 246 247 static int 248 ietp_attach(struct ietp_softc *sc) 249 { 250 const struct hid_device_info *hw = hid_get_device_info(sc->dev); 251 void *d_ptr; 252 hid_size_t d_len; 253 int32_t minor, major; 254 int error; 255 256 sc->report_id = sc->hi_precision ? 257 IETP_REPORT_ID_HI : IETP_REPORT_ID_LO; 258 sc->report_len = sc->hi_precision ? 259 IETP_REPORT_LEN_HI : IETP_REPORT_LEN_LO; 260 261 /* Try to detect 3-rd button by relative mouse TLC */ 262 if (!sc->is_clickpad) { 263 error = hid_get_report_descr(sc->dev, &d_ptr, &d_len); 264 if (error != 0) { 265 device_printf(sc->dev, "could not retrieve report " 266 "descriptor from device: %d\n", error); 267 return (ENXIO); 268 } 269 if (hidbus_locate(d_ptr, d_len, HID_USAGE2(HUP_BUTTON, 3), 270 hid_input, hidbus_get_index(sc->dev), 0, NULL, NULL, NULL, 271 NULL)) 272 sc->has_3buttons = true; 273 } 274 275 sc->evdev = evdev_alloc(); 276 evdev_set_name(sc->evdev, device_get_desc(sc->dev)); 277 evdev_set_phys(sc->evdev, device_get_nameunit(sc->dev)); 278 evdev_set_id(sc->evdev, hw->idBus, hw->idVendor, hw->idProduct, 279 hw->idVersion); 280 evdev_set_serial(sc->evdev, hw->serial); 281 evdev_set_methods(sc->evdev, sc->dev, &ietp_evdev_methods); 282 evdev_set_flag(sc->evdev, EVDEV_FLAG_MT_STCOMPAT); 283 evdev_set_flag(sc->evdev, EVDEV_FLAG_EXT_EPOCH); /* hidbus child */ 284 285 evdev_support_event(sc->evdev, EV_SYN); 286 evdev_support_event(sc->evdev, EV_ABS); 287 evdev_support_event(sc->evdev, EV_KEY); 288 evdev_support_prop(sc->evdev, INPUT_PROP_POINTER); 289 evdev_support_key(sc->evdev, BTN_LEFT); 290 if (sc->is_clickpad) { 291 evdev_support_prop(sc->evdev, INPUT_PROP_BUTTONPAD); 292 } else { 293 evdev_support_key(sc->evdev, BTN_RIGHT); 294 if (sc->has_3buttons) 295 evdev_support_key(sc->evdev, BTN_MIDDLE); 296 } 297 298 major = IETP_FINGER_MAX_WIDTH * MAX(sc->trace_x, sc->trace_y); 299 minor = IETP_FINGER_MAX_WIDTH * MIN(sc->trace_x, sc->trace_y); 300 301 evdev_support_abs(sc->evdev, ABS_MT_SLOT, 302 0, IETP_MAX_FINGERS - 1, 0, 0, 0); 303 evdev_support_abs(sc->evdev, ABS_MT_TRACKING_ID, 304 -1, IETP_MAX_FINGERS - 1, 0, 0, 0); 305 evdev_support_abs(sc->evdev, ABS_MT_POSITION_X, 306 0, sc->max_x, 0, 0, sc->res_x); 307 evdev_support_abs(sc->evdev, ABS_MT_POSITION_Y, 308 0, sc->max_y, 0, 0, sc->res_y); 309 evdev_support_abs(sc->evdev, ABS_MT_PRESSURE, 310 0, IETP_MAX_PRESSURE, 0, 0, 0); 311 evdev_support_abs(sc->evdev, ABS_MT_ORIENTATION, 0, 1, 0, 0, 0); 312 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MAJOR, 0, major, 0, 0, 0); 313 evdev_support_abs(sc->evdev, ABS_MT_TOUCH_MINOR, 0, minor, 0, 0, 0); 314 evdev_support_abs(sc->evdev, ABS_DISTANCE, 0, 1, 0, 0, 0); 315 316 error = evdev_register(sc->evdev); 317 if (error != 0) { 318 ietp_detach(sc); 319 return (ENOMEM); 320 } 321 322 hidbus_set_intr(sc->dev, ietp_intr, sc); 323 324 device_printf(sc->dev, "[%d:%d], %s\n", sc->max_x, sc->max_y, 325 sc->is_clickpad ? "clickpad" : 326 sc->has_3buttons ? "3 buttons" : "2 buttons"); 327 328 return (0); 329 } 330 331 static int 332 ietp_detach(struct ietp_softc *sc) 333 { 334 evdev_free(sc->evdev); 335 336 return (0); 337 } 338 339 static void 340 ietp_intr(void *context, void *buf, hid_size_t len) 341 { 342 struct ietp_softc *sc = context; 343 union evdev_mt_slot slot_data; 344 uint8_t *report, *fdata; 345 int32_t finger; 346 int32_t x, y, w, h, wh; 347 348 /* we seem to get 0 length reports sometimes, ignore them */ 349 if (len == 0) 350 return; 351 if (len != sc->report_len) { 352 DPRINTF("wrong report length (%d vs %d expected)", len, sc->report_len); 353 return; 354 } 355 356 report = buf; 357 if (*report != sc->report_id) 358 return; 359 360 evdev_push_key(sc->evdev, BTN_LEFT, 361 report[IETP_TOUCH_INFO] & IETP_TOUCH_LMB); 362 evdev_push_key(sc->evdev, BTN_MIDDLE, 363 report[IETP_TOUCH_INFO] & IETP_TOUCH_MMB); 364 evdev_push_key(sc->evdev, BTN_RIGHT, 365 report[IETP_TOUCH_INFO] & IETP_TOUCH_RMB); 366 evdev_push_abs(sc->evdev, ABS_DISTANCE, 367 (report[IETP_HOVER_INFO] & 0x40) >> 6); 368 369 for (finger = 0, fdata = report + IETP_FINGER_DATA; 370 finger < IETP_MAX_FINGERS; 371 finger++, fdata += IETP_FINGER_DATA_LEN) { 372 if ((report[IETP_TOUCH_INFO] & (1 << (finger + 3))) != 0) { 373 if (sc->hi_precision) { 374 x = fdata[0] << 8 | fdata[1]; 375 y = fdata[2] << 8 | fdata[3]; 376 wh = report[IETP_WH_DATA + finger]; 377 } else { 378 x = (fdata[0] & 0xf0) << 4 | fdata[1]; 379 y = (fdata[0] & 0x0f) << 8 | fdata[2]; 380 wh = fdata[3]; 381 } 382 383 if (x > sc->max_x || y > sc->max_y) { 384 DPRINTF("[%d] x=%d y=%d over max (%d, %d)", 385 finger, x, y, sc->max_x, sc->max_y); 386 continue; 387 } 388 389 /* Reduce trace size to not treat large finger as palm */ 390 w = (wh & 0x0F) * (sc->trace_x - IETP_FWIDTH_REDUCE); 391 h = (wh >> 4) * (sc->trace_y - IETP_FWIDTH_REDUCE); 392 393 slot_data = (union evdev_mt_slot) { 394 .id = finger, 395 .x = x, 396 .y = sc->max_y - y, 397 .p = MIN((int32_t)fdata[4] + sc->pressure_base, 398 IETP_MAX_PRESSURE), 399 .ori = w > h ? 1 : 0, 400 .maj = MAX(w, h), 401 .min = MIN(w, h), 402 }; 403 evdev_mt_push_slot(sc->evdev, finger, &slot_data); 404 } else { 405 evdev_push_abs(sc->evdev, ABS_MT_SLOT, finger); 406 evdev_push_abs(sc->evdev, ABS_MT_TRACKING_ID, -1); 407 } 408 } 409 410 evdev_sync(sc->evdev); 411 } 412 413 static int32_t 414 ietp_res2dpmm(uint8_t res, bool hi_precision) 415 { 416 int32_t dpi; 417 418 dpi = hi_precision ? 300 + res * 100 : 790 + res * 10; 419 420 return (dpi * 10 /254); 421 } 422 423 static void 424 ietp_iic_identify(driver_t *driver, device_t parent) 425 { 426 void *d_ptr; 427 hid_size_t d_len; 428 int isize; 429 uint8_t iid; 430 431 if (HIDBUS_LOOKUP_ID(parent, ietp_iic_devs) == NULL) 432 return; 433 if (hid_get_report_descr(parent, &d_ptr, &d_len) != 0) 434 return; 435 436 /* 437 * Some Elantech trackpads have a mangled HID report descriptor, which 438 * reads as having an incorrect input size (i.e. < IETP_REPORT_LEN_LO). 439 * If the input size is incorrect, load a dummy report descriptor. 440 */ 441 442 isize = hid_report_size_max(d_ptr, d_len, hid_input, &iid); 443 if (isize >= IETP_REPORT_LEN_LO) 444 return; 445 446 hid_set_report_descr(parent, ietp_dummy_rdesc, 447 sizeof(ietp_dummy_rdesc)); 448 } 449 450 static int 451 ietp_iic_probe(device_t dev) 452 { 453 struct ietp_softc *sc = device_get_softc(dev); 454 device_t iichid; 455 int error; 456 457 error = HIDBUS_LOOKUP_DRIVER_INFO(dev, ietp_iic_devs); 458 if (error != 0) 459 return (error); 460 461 iichid = device_get_parent(device_get_parent(dev)); 462 if (device_get_devclass(iichid) != devclass_find("iichid")) 463 return (ENXIO); 464 465 sc->dev = dev; 466 467 return (ietp_probe(sc)); 468 } 469 470 static int 471 ietp_iic_attach(device_t dev) 472 { 473 struct ietp_softc *sc = device_get_softc(dev); 474 uint16_t buf, reg; 475 uint8_t *buf8; 476 uint8_t pattern; 477 478 buf8 = (uint8_t *)&buf; 479 480 if (ietp_iic_read_reg(dev, IETP_UNIQUEID, sizeof(buf), &buf) != 0) { 481 device_printf(sc->dev, "failed reading product ID\n"); 482 return (EIO); 483 } 484 sc->product_id = le16toh(buf); 485 486 if (ietp_iic_read_reg(dev, IETP_PATTERN, sizeof(buf), &buf) != 0) { 487 device_printf(sc->dev, "failed reading pattern\n"); 488 return (EIO); 489 } 490 pattern = buf == 0xFFFF ? 0 : buf8[1]; 491 sc->hi_precision = pattern >= 0x02; 492 493 reg = pattern >= 0x01 ? IETP_IC_TYPE : IETP_OSM_VERSION; 494 if (ietp_iic_read_reg(dev, reg, sizeof(buf), &buf) != 0) { 495 device_printf(sc->dev, "failed reading IC type\n"); 496 return (EIO); 497 } 498 sc->ic_type = pattern >= 0x01 ? be16toh(buf) : buf8[1]; 499 500 if (ietp_iic_read_reg(dev, IETP_NSM_VERSION, sizeof(buf), &buf) != 0) { 501 device_printf(sc->dev, "failed reading SM version\n"); 502 return (EIO); 503 } 504 sc->is_clickpad = (buf8[0] & 0x10) != 0; 505 506 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 507 device_printf(sc->dev, "failed to set absolute mode\n"); 508 return (EIO); 509 } 510 511 if (ietp_iic_read_reg(dev, IETP_MAX_X_AXIS, sizeof(buf), &buf) != 0) { 512 device_printf(sc->dev, "failed reading max x\n"); 513 return (EIO); 514 } 515 sc->max_x = le16toh(buf); 516 517 if (ietp_iic_read_reg(dev, IETP_MAX_Y_AXIS, sizeof(buf), &buf) != 0) { 518 device_printf(sc->dev, "failed reading max y\n"); 519 return (EIO); 520 } 521 sc->max_y = le16toh(buf); 522 523 if (ietp_iic_read_reg(dev, IETP_TRACENUM, sizeof(buf), &buf) != 0) { 524 device_printf(sc->dev, "failed reading trace info\n"); 525 return (EIO); 526 } 527 sc->trace_x = sc->max_x / buf8[0]; 528 sc->trace_y = sc->max_y / buf8[1]; 529 530 if (ietp_iic_read_reg(dev, IETP_PRESSURE, sizeof(buf), &buf) != 0) { 531 device_printf(sc->dev, "failed reading pressure format\n"); 532 return (EIO); 533 } 534 sc->pressure_base = (buf8[0] & 0x10) ? 0 : IETP_PRESSURE_BASE; 535 536 if (ietp_iic_read_reg(dev, IETP_RESOLUTION, sizeof(buf), &buf) != 0) { 537 device_printf(sc->dev, "failed reading resolution\n"); 538 return (EIO); 539 } 540 /* Conversion from internal format to dot per mm */ 541 sc->res_x = ietp_res2dpmm(buf8[0], sc->hi_precision); 542 sc->res_y = ietp_res2dpmm(buf8[1], sc->hi_precision); 543 544 return (ietp_attach(sc)); 545 } 546 547 static int 548 ietp_iic_detach(device_t dev) 549 { 550 struct ietp_softc *sc = device_get_softc(dev); 551 552 if (ietp_iic_set_absolute_mode(dev, false) != 0) 553 device_printf(dev, "failed setting standard mode\n"); 554 555 return (ietp_detach(sc)); 556 } 557 558 static int 559 ietp_iic_resume(device_t dev) 560 { 561 if (ietp_iic_set_absolute_mode(dev, true) != 0) { 562 device_printf(dev, "reset when resuming failed: \n"); 563 return (EIO); 564 } 565 566 return (0); 567 } 568 569 static int 570 ietp_iic_set_absolute_mode(device_t dev, bool enable) 571 { 572 struct ietp_softc *sc = device_get_softc(dev); 573 static const struct { 574 uint16_t ic_type; 575 uint16_t product_id; 576 } special_fw[] = { 577 { 0x0E, 0x05 }, { 0x0E, 0x06 }, { 0x0E, 0x07 }, { 0x0E, 0x09 }, 578 { 0x0E, 0x13 }, { 0x08, 0x26 }, 579 }; 580 uint16_t val; 581 int i, error; 582 bool require_wakeup; 583 584 error = 0; 585 586 /* 587 * Some ASUS touchpads need to be powered on to enter absolute mode. 588 */ 589 require_wakeup = false; 590 for (i = 0; i < nitems(special_fw); i++) { 591 if (sc->ic_type == special_fw[i].ic_type && 592 sc->product_id == special_fw[i].product_id) { 593 require_wakeup = true; 594 break; 595 } 596 } 597 598 if (require_wakeup && hidbus_intr_start(dev) != 0) { 599 device_printf(dev, "failed writing poweron command\n"); 600 return (EIO); 601 } 602 603 val = enable ? IETP_CTRL_ABSOLUTE : IETP_CTRL_STANDARD; 604 if (ietp_iic_write_reg(dev, IETP_CONTROL, val) != 0) { 605 device_printf(dev, "failed setting absolute mode\n"); 606 error = EIO; 607 } 608 609 if (require_wakeup && hidbus_intr_stop(dev) != 0) { 610 device_printf(dev, "failed writing poweroff command\n"); 611 error = EIO; 612 } 613 614 return (error); 615 } 616 617 static int 618 ietp_iic_read_reg(device_t dev, uint16_t reg, size_t len, void *val) 619 { 620 device_t iichid = device_get_parent(device_get_parent(dev)); 621 uint16_t addr = iicbus_get_addr(iichid) << 1; 622 uint8_t cmd[2] = { reg & 0xff, (reg >> 8) & 0xff }; 623 struct iic_msg msgs[2] = { 624 { addr, IIC_M_WR | IIC_M_NOSTOP, sizeof(cmd), cmd }, 625 { addr, IIC_M_RD, len, val }, 626 }; 627 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 628 int error; 629 630 DPRINTF("Read reg 0x%04x with size %zu\n", reg, len); 631 632 error = hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird); 633 if (error != 0) 634 return (error); 635 636 DPRINTF("Response: %*D\n", (int)len, val, " "); 637 638 return (0); 639 } 640 641 static int 642 ietp_iic_write_reg(device_t dev, uint16_t reg, uint16_t val) 643 { 644 device_t iichid = device_get_parent(device_get_parent(dev)); 645 uint16_t addr = iicbus_get_addr(iichid) << 1; 646 uint8_t cmd[4] = { reg & 0xff, (reg >> 8) & 0xff, 647 val & 0xff, (val >> 8) & 0xff }; 648 struct iic_msg msgs[1] = { 649 { addr, IIC_M_WR, sizeof(cmd), cmd }, 650 }; 651 struct iic_rdwr_data ird = { msgs, nitems(msgs) }; 652 653 DPRINTF("Write reg 0x%04x with value 0x%04x\n", reg, val); 654 655 return (hid_ioctl(dev, I2CRDWR, (uintptr_t)&ird)); 656 } 657 658 static device_method_t ietp_methods[] = { 659 DEVMETHOD(device_identify, ietp_iic_identify), 660 DEVMETHOD(device_probe, ietp_iic_probe), 661 DEVMETHOD(device_attach, ietp_iic_attach), 662 DEVMETHOD(device_detach, ietp_iic_detach), 663 DEVMETHOD(device_resume, ietp_iic_resume), 664 DEVMETHOD_END 665 }; 666 667 static driver_t ietp_driver = { 668 .name = "ietp", 669 .methods = ietp_methods, 670 .size = sizeof(struct ietp_softc), 671 }; 672 673 DRIVER_MODULE(ietp, hidbus, ietp_driver, NULL, NULL); 674 MODULE_DEPEND(ietp, hidbus, 1, 1, 1); 675 MODULE_DEPEND(ietp, hid, 1, 1, 1); 676 MODULE_DEPEND(ietp, evdev, 1, 1, 1); 677 MODULE_VERSION(ietp, 1); 678 HID_PNP_INFO(ietp_iic_devs); 679