ihidev.c revision 1.20.2.1
1 /* $NetBSD: ihidev.c,v 1.20.2.1 2021/08/09 00:30:09 thorpej Exp $ */ 2 /* $OpenBSD ihidev.c,v 1.13 2017/04/08 02:57:23 deraadt Exp $ */ 3 4 /*- 5 * Copyright (c) 2017 The NetBSD Foundation, Inc. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Manuel Bouyer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 24 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 25 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 26 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 30 * POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 /* 34 * Copyright (c) 2015, 2016 joshua stein <jcs (at) openbsd.org> 35 * 36 * Permission to use, copy, modify, and distribute this software for any 37 * purpose with or without fee is hereby granted, provided that the above 38 * copyright notice and this permission notice appear in all copies. 39 * 40 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 41 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 42 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 43 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 44 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 45 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 46 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 47 */ 48 49 /* 50 * HID-over-i2c driver 51 * 52 * https://msdn.microsoft.com/en-us/library/windows/hardware/dn642101%28v=vs.85%29.aspx 53 * 54 */ 55 56 #include <sys/cdefs.h> 57 __KERNEL_RCSID(0, "$NetBSD: ihidev.c,v 1.20.2.1 2021/08/09 00:30:09 thorpej Exp $"); 58 59 #include <sys/param.h> 60 #include <sys/systm.h> 61 #include <sys/device.h> 62 #include <sys/kmem.h> 63 64 65 #include <dev/i2c/i2cvar.h> 66 #include <dev/i2c/ihidev.h> 67 68 #include <dev/hid/hid.h> 69 70 #if defined(__i386__) || defined(__amd64__) 71 # include "acpica.h" 72 #endif 73 #if NACPICA > 0 74 #include <dev/acpi/acpivar.h> 75 #include <dev/acpi/acpi_intr.h> 76 #endif 77 78 #include "locators.h" 79 80 /* #define IHIDEV_DEBUG */ 81 82 #ifdef IHIDEV_DEBUG 83 #define DPRINTF(x) printf x 84 #else 85 #define DPRINTF(x) 86 #endif 87 88 /* 7.2 */ 89 enum { 90 I2C_HID_CMD_DESCR = 0x0, 91 I2C_HID_CMD_RESET = 0x1, 92 I2C_HID_CMD_GET_REPORT = 0x2, 93 I2C_HID_CMD_SET_REPORT = 0x3, 94 I2C_HID_CMD_GET_IDLE = 0x4, 95 I2C_HID_CMD_SET_IDLE = 0x5, 96 I2C_HID_CMD_GET_PROTO = 0x6, 97 I2C_HID_CMD_SET_PROTO = 0x7, 98 I2C_HID_CMD_SET_POWER = 0x8, 99 100 /* pseudo commands */ 101 I2C_HID_REPORT_DESCR = 0x100, 102 }; 103 104 static int I2C_HID_POWER_ON = 0x0; 105 static int I2C_HID_POWER_OFF = 0x1; 106 107 static int ihidev_match(device_t, cfdata_t, void *); 108 static void ihidev_attach(device_t, device_t, void *); 109 static int ihidev_detach(device_t, int); 110 CFATTACH_DECL_NEW(ihidev, sizeof(struct ihidev_softc), 111 ihidev_match, ihidev_attach, ihidev_detach, NULL); 112 113 static bool ihiddev_intr_init(struct ihidev_softc *); 114 static void ihiddev_intr_fini(struct ihidev_softc *); 115 116 static bool ihidev_suspend(device_t, const pmf_qual_t *); 117 static bool ihidev_resume(device_t, const pmf_qual_t *); 118 static int ihidev_hid_command(struct ihidev_softc *, int, void *, bool); 119 static int ihidev_intr(void *); 120 static void ihidev_softintr(void *); 121 static int ihidev_reset(struct ihidev_softc *, bool); 122 static int ihidev_hid_desc_parse(struct ihidev_softc *); 123 124 static int ihidev_maxrepid(void *, int); 125 static int ihidev_print(void *, const char *); 126 static int ihidev_submatch(device_t, cfdata_t, const int *, void *); 127 128 static bool ihidev_acpi_get_info(struct ihidev_softc *); 129 130 static const struct device_compatible_entry compat_data[] = { 131 { .compat = "PNP0C50" }, 132 { .compat = "ACPI0C50" }, 133 { .compat = "hid-over-i2c" }, 134 DEVICE_COMPAT_EOL 135 }; 136 137 static int 138 ihidev_match(device_t parent, cfdata_t match, void *aux) 139 { 140 struct i2c_attach_args * const ia = aux; 141 int match_result; 142 143 if (iic_use_direct_match(ia, match, compat_data, &match_result)) 144 return I2C_MATCH_DIRECT_COMPATIBLE; 145 146 return 0; 147 } 148 149 static void 150 ihidev_attach(device_t parent, device_t self, void *aux) 151 { 152 struct ihidev_softc *sc = device_private(self); 153 struct i2c_attach_args *ia = aux; 154 struct ihidev_attach_arg iha; 155 device_t dev; 156 int repid, repsz; 157 int isize; 158 int locs[IHIDBUSCF_NLOCS]; 159 160 sc->sc_dev = self; 161 sc->sc_tag = ia->ia_tag; 162 sc->sc_addr = ia->ia_addr; 163 mutex_init(&sc->sc_intr_lock, MUTEX_DEFAULT, IPL_VM); 164 165 if (devhandle_type(device_handle(self)) != DEVHANDLE_TYPE_ACPI) { 166 aprint_error(": unsupported device tree type\n"); 167 return; 168 } 169 if (! ihidev_acpi_get_info(sc)) { 170 return; 171 } 172 173 if (ihidev_hid_command(sc, I2C_HID_CMD_DESCR, NULL, false) || 174 ihidev_hid_desc_parse(sc)) { 175 aprint_error(": failed fetching initial HID descriptor\n"); 176 return; 177 } 178 179 aprint_naive("\n"); 180 aprint_normal(": vendor 0x%x product 0x%x, %s\n", 181 le16toh(sc->hid_desc.wVendorID), le16toh(sc->hid_desc.wProductID), 182 ia->ia_name); 183 184 sc->sc_nrepid = ihidev_maxrepid(sc->sc_report, sc->sc_reportlen); 185 if (sc->sc_nrepid < 0) 186 return; 187 188 aprint_normal_dev(self, "%d report id%s\n", sc->sc_nrepid, 189 sc->sc_nrepid > 1 ? "s" : ""); 190 191 sc->sc_nrepid++; 192 sc->sc_subdevs = kmem_zalloc(sc->sc_nrepid * sizeof(struct ihidev *), 193 KM_SLEEP); 194 195 /* find largest report size and allocate memory for input buffer */ 196 sc->sc_isize = le16toh(sc->hid_desc.wMaxInputLength); 197 for (repid = 0; repid < sc->sc_nrepid; repid++) { 198 repsz = hid_report_size(sc->sc_report, sc->sc_reportlen, 199 hid_input, repid); 200 201 isize = repsz + 2; /* two bytes for the length */ 202 isize += (sc->sc_nrepid != 1); /* one byte for the report ID */ 203 if (isize > sc->sc_isize) 204 sc->sc_isize = isize; 205 206 DPRINTF(("%s: repid %d size %d\n", sc->sc_dev.dv_xname, repid, 207 repsz)); 208 } 209 sc->sc_ibuf = kmem_zalloc(sc->sc_isize, KM_SLEEP); 210 if (! ihiddev_intr_init(sc)) { 211 return; 212 } 213 214 iha.iaa = ia; 215 iha.parent = sc; 216 217 /* Look for a driver claiming all report IDs first. */ 218 iha.reportid = IHIDEV_CLAIM_ALLREPORTID; 219 locs[IHIDBUSCF_REPORTID] = IHIDEV_CLAIM_ALLREPORTID; 220 dev = config_found(self, &iha, ihidev_print, 221 CFARGS(.submatch = ihidev_submatch, 222 .locators = locs)); 223 if (dev != NULL) { 224 for (repid = 0; repid < sc->sc_nrepid; repid++) 225 sc->sc_subdevs[repid] = device_private(dev); 226 return; 227 } 228 229 for (repid = 0; repid < sc->sc_nrepid; repid++) { 230 if (hid_report_size(sc->sc_report, sc->sc_reportlen, hid_input, 231 repid) == 0 && 232 hid_report_size(sc->sc_report, sc->sc_reportlen, 233 hid_output, repid) == 0 && 234 hid_report_size(sc->sc_report, sc->sc_reportlen, 235 hid_feature, repid) == 0) 236 continue; 237 238 iha.reportid = repid; 239 locs[IHIDBUSCF_REPORTID] = repid; 240 dev = config_found(self, &iha, ihidev_print, 241 CFARGS(.submatch = ihidev_submatch, 242 .locators = locs)); 243 sc->sc_subdevs[repid] = device_private(dev); 244 } 245 246 /* power down until we're opened */ 247 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, &I2C_HID_POWER_OFF, false)) { 248 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 249 return; 250 } 251 if (!pmf_device_register(self, ihidev_suspend, ihidev_resume)) 252 aprint_error_dev(self, "couldn't establish power handler\n"); 253 } 254 255 static int 256 ihidev_detach(device_t self, int flags) 257 { 258 struct ihidev_softc *sc = device_private(self); 259 260 mutex_enter(&sc->sc_intr_lock); 261 ihiddev_intr_fini(sc); 262 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 263 &I2C_HID_POWER_OFF, true)) 264 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 265 mutex_exit(&sc->sc_intr_lock); 266 if (sc->sc_ibuf != NULL) { 267 kmem_free(sc->sc_ibuf, sc->sc_isize); 268 sc->sc_ibuf = NULL; 269 } 270 271 if (sc->sc_report != NULL) 272 kmem_free(sc->sc_report, sc->sc_reportlen); 273 274 pmf_device_deregister(self); 275 return (0); 276 } 277 278 static bool 279 ihidev_suspend(device_t self, const pmf_qual_t *q) 280 { 281 struct ihidev_softc *sc = device_private(self); 282 283 mutex_enter(&sc->sc_intr_lock); 284 if (sc->sc_refcnt > 0) { 285 printf("ihidev power off\n"); 286 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 287 &I2C_HID_POWER_OFF, true)) 288 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 289 } 290 mutex_exit(&sc->sc_intr_lock); 291 return true; 292 } 293 294 static bool 295 ihidev_resume(device_t self, const pmf_qual_t *q) 296 { 297 struct ihidev_softc *sc = device_private(self); 298 299 mutex_enter(&sc->sc_intr_lock); 300 if (sc->sc_refcnt > 0) { 301 printf("ihidev power reset\n"); 302 ihidev_reset(sc, true); 303 } 304 mutex_exit(&sc->sc_intr_lock); 305 return true; 306 } 307 308 static int 309 ihidev_hid_command(struct ihidev_softc *sc, int hidcmd, void *arg, bool poll) 310 { 311 int i, res = 1; 312 int flags = poll ? I2C_F_POLL : 0; 313 314 iic_acquire_bus(sc->sc_tag, flags); 315 316 switch (hidcmd) { 317 case I2C_HID_CMD_DESCR: { 318 /* 319 * 5.2.2 - HID Descriptor Retrieval 320 * register is passed from the controller 321 */ 322 uint8_t cmd[] = { 323 htole16(sc->sc_hid_desc_addr) & 0xff, 324 htole16(sc->sc_hid_desc_addr) >> 8, 325 }; 326 327 DPRINTF(("%s: HID command I2C_HID_CMD_DESCR at 0x%x\n", 328 sc->sc_dev.dv_xname, htole16(sc->sc_hid_desc_addr))); 329 330 /* 20 00 */ 331 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 332 &cmd, sizeof(cmd), &sc->hid_desc_buf, 333 sizeof(struct i2c_hid_desc), flags); 334 335 DPRINTF(("%s: HID descriptor:", sc->sc_dev.dv_xname)); 336 for (i = 0; i < sizeof(struct i2c_hid_desc); i++) 337 DPRINTF((" %.2x", sc->hid_desc_buf[i])); 338 DPRINTF(("\n")); 339 340 break; 341 } 342 case I2C_HID_CMD_RESET: { 343 uint8_t cmd[] = { 344 htole16(sc->hid_desc.wCommandRegister) & 0xff, 345 htole16(sc->hid_desc.wCommandRegister) >> 8, 346 0, 347 I2C_HID_CMD_RESET, 348 }; 349 350 DPRINTF(("%s: HID command I2C_HID_CMD_RESET\n", 351 sc->sc_dev.dv_xname)); 352 353 /* 22 00 00 01 */ 354 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 355 &cmd, sizeof(cmd), NULL, 0, flags); 356 357 break; 358 } 359 case I2C_HID_CMD_GET_REPORT: { 360 struct i2c_hid_report_request *rreq = 361 (struct i2c_hid_report_request *)arg; 362 363 uint8_t cmd[] = { 364 htole16(sc->hid_desc.wCommandRegister) & 0xff, 365 htole16(sc->hid_desc.wCommandRegister) >> 8, 366 0, 367 I2C_HID_CMD_GET_REPORT, 368 0, 0, 0, 369 }; 370 int cmdlen = 7; 371 int dataoff = 4; 372 int report_id = rreq->id; 373 int report_id_len = 1; 374 int report_len = rreq->len + 2; 375 int d; 376 uint8_t *tmprep; 377 378 DPRINTF(("%s: HID command I2C_HID_CMD_GET_REPORT %d " 379 "(type %d, len %d)\n", sc->sc_dev.dv_xname, report_id, 380 rreq->type, rreq->len)); 381 382 /* 383 * 7.2.2.4 - "The protocol is optimized for Report < 15. If a 384 * report ID >= 15 is necessary, then the Report ID in the Low 385 * Byte must be set to 1111 and a Third Byte is appended to the 386 * protocol. This Third Byte contains the entire/actual report 387 * ID." 388 */ 389 if (report_id >= 15) { 390 cmd[dataoff++] = report_id; 391 report_id = 15; 392 report_id_len = 2; 393 } else 394 cmdlen--; 395 396 cmd[2] = report_id | rreq->type << 4; 397 398 cmd[dataoff++] = sc->hid_desc.wDataRegister & 0xff; 399 cmd[dataoff] = sc->hid_desc.wDataRegister >> 8; 400 401 /* 402 * 7.2.2.2 - Response will be a 2-byte length value, the report 403 * id with length determined above, and then the report. 404 * Allocate rreq->len + 2 + 2 bytes, read into that temporary 405 * buffer, and then copy only the report back out to 406 * rreq->data. 407 */ 408 report_len += report_id_len; 409 tmprep = kmem_zalloc(report_len, KM_NOSLEEP); 410 411 /* type 3 id 8: 22 00 38 02 23 00 */ 412 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 413 &cmd, cmdlen, tmprep, report_len, flags); 414 415 d = tmprep[0] | tmprep[1] << 8; 416 if (d != report_len) { 417 DPRINTF(("%s: response size %d != expected length %d\n", 418 sc->sc_dev.dv_xname, d, report_len)); 419 } 420 421 if (report_id_len == 2) 422 d = tmprep[2] | tmprep[3] << 8; 423 else 424 d = tmprep[2]; 425 426 if (d != rreq->id) { 427 DPRINTF(("%s: response report id %d != %d\n", 428 sc->sc_dev.dv_xname, d, rreq->id)); 429 iic_release_bus(sc->sc_tag, 0); 430 kmem_free(tmprep, report_len); 431 return (1); 432 } 433 434 DPRINTF(("%s: response:", sc->sc_dev.dv_xname)); 435 for (i = 0; i < report_len; i++) 436 DPRINTF((" %.2x", tmprep[i])); 437 DPRINTF(("\n")); 438 439 memcpy(rreq->data, tmprep + 2 + report_id_len, rreq->len); 440 kmem_free(tmprep, report_len); 441 442 break; 443 } 444 case I2C_HID_CMD_SET_REPORT: { 445 struct i2c_hid_report_request *rreq = 446 (struct i2c_hid_report_request *)arg; 447 448 uint8_t cmd[] = { 449 htole16(sc->hid_desc.wCommandRegister) & 0xff, 450 htole16(sc->hid_desc.wCommandRegister) >> 8, 451 0, 452 I2C_HID_CMD_SET_REPORT, 453 0, 0, 0, 0, 0, 0, 454 }; 455 int cmdlen = 10; 456 int report_id = rreq->id; 457 int report_len = 2 + (report_id ? 1 : 0) + rreq->len; 458 int dataoff; 459 uint8_t *finalcmd; 460 461 DPRINTF(("%s: HID command I2C_HID_CMD_SET_REPORT %d " 462 "(type %d, len %d):", sc->sc_dev.dv_xname, report_id, 463 rreq->type, rreq->len)); 464 for (i = 0; i < rreq->len; i++) 465 DPRINTF((" %.2x", ((uint8_t *)rreq->data)[i])); 466 DPRINTF(("\n")); 467 468 /* 469 * 7.2.2.4 - "The protocol is optimized for Report < 15. If a 470 * report ID >= 15 is necessary, then the Report ID in the Low 471 * Byte must be set to 1111 and a Third Byte is appended to the 472 * protocol. This Third Byte contains the entire/actual report 473 * ID." 474 */ 475 dataoff = 4; 476 if (report_id >= 15) { 477 cmd[dataoff++] = report_id; 478 report_id = 15; 479 } else 480 cmdlen--; 481 482 cmd[2] = report_id | rreq->type << 4; 483 484 if (rreq->type == I2C_HID_REPORT_TYPE_FEATURE) { 485 cmd[dataoff++] = htole16(sc->hid_desc.wDataRegister) 486 & 0xff; 487 cmd[dataoff++] = htole16(sc->hid_desc.wDataRegister) 488 >> 8; 489 } else { 490 cmd[dataoff++] = htole16(sc->hid_desc.wOutputRegister) 491 & 0xff; 492 cmd[dataoff++] = htole16(sc->hid_desc.wOutputRegister) 493 >> 8; 494 } 495 496 cmd[dataoff++] = report_len & 0xff; 497 cmd[dataoff++] = report_len >> 8; 498 cmd[dataoff] = rreq->id; 499 500 finalcmd = kmem_zalloc(cmdlen + rreq->len, KM_NOSLEEP); 501 502 memcpy(finalcmd, cmd, cmdlen); 503 memcpy(finalcmd + cmdlen, rreq->data, rreq->len); 504 505 /* type 3 id 4: 22 00 34 03 23 00 04 00 04 03 */ 506 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 507 finalcmd, cmdlen + rreq->len, NULL, 0, flags); 508 kmem_free(finalcmd, cmdlen + rreq->len); 509 510 break; 511 } 512 513 case I2C_HID_CMD_SET_POWER: { 514 int power = *(int *)arg; 515 uint8_t cmd[] = { 516 htole16(sc->hid_desc.wCommandRegister) & 0xff, 517 htole16(sc->hid_desc.wCommandRegister) >> 8, 518 power, 519 I2C_HID_CMD_SET_POWER, 520 }; 521 522 DPRINTF(("%s: HID command I2C_HID_CMD_SET_POWER(%d)\n", 523 sc->sc_dev.dv_xname, power)); 524 525 /* 22 00 00 08 */ 526 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 527 &cmd, sizeof(cmd), NULL, 0, flags); 528 529 break; 530 } 531 case I2C_HID_REPORT_DESCR: { 532 uint8_t cmd[] = { 533 htole16(sc->hid_desc.wReportDescRegister) & 0xff, 534 htole16(sc->hid_desc.wReportDescRegister) >> 8, 535 }; 536 537 DPRINTF(("%s: HID command I2C_HID_REPORT_DESCR at 0x%x with " 538 "size %d\n", sc->sc_dev.dv_xname, cmd[0], 539 sc->sc_reportlen)); 540 541 /* 20 00 */ 542 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 543 &cmd, sizeof(cmd), sc->sc_report, sc->sc_reportlen, flags); 544 545 DPRINTF(("%s: HID report descriptor:", sc->sc_dev.dv_xname)); 546 for (i = 0; i < sc->sc_reportlen; i++) 547 DPRINTF((" %.2x", sc->sc_report[i])); 548 DPRINTF(("\n")); 549 550 break; 551 } 552 default: 553 aprint_error_dev(sc->sc_dev, "unknown command %d\n", 554 hidcmd); 555 } 556 557 iic_release_bus(sc->sc_tag, flags); 558 559 return (res); 560 } 561 562 static int 563 ihidev_reset(struct ihidev_softc *sc, bool poll) 564 { 565 DPRINTF(("%s: resetting\n", sc->sc_dev.dv_xname)); 566 567 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 568 &I2C_HID_POWER_ON, poll)) { 569 aprint_error_dev(sc->sc_dev, "failed to power on\n"); 570 return (1); 571 } 572 573 DELAY(1000); 574 575 if (ihidev_hid_command(sc, I2C_HID_CMD_RESET, 0, poll)) { 576 aprint_error_dev(sc->sc_dev, "failed to reset hardware\n"); 577 578 ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 579 &I2C_HID_POWER_OFF, poll); 580 581 return (1); 582 } 583 584 DELAY(1000); 585 586 return (0); 587 } 588 589 /* 590 * 5.2.2 - HID Descriptor Retrieval 591 * 592 * parse HID Descriptor that has already been read into hid_desc with 593 * I2C_HID_CMD_DESCR 594 */ 595 static int 596 ihidev_hid_desc_parse(struct ihidev_softc *sc) 597 { 598 int retries = 3; 599 600 /* must be v01.00 */ 601 if (le16toh(sc->hid_desc.bcdVersion) != 0x0100) { 602 aprint_error_dev(sc->sc_dev, 603 "bad HID descriptor bcdVersion (0x%x)\n", 604 le16toh(sc->hid_desc.bcdVersion)); 605 return (1); 606 } 607 608 /* must be 30 bytes for v1.00 */ 609 if (le16toh(sc->hid_desc.wHIDDescLength != 610 sizeof(struct i2c_hid_desc))) { 611 aprint_error_dev(sc->sc_dev, 612 "bad HID descriptor size (%d != %zu)\n", 613 le16toh(sc->hid_desc.wHIDDescLength), 614 sizeof(struct i2c_hid_desc)); 615 return (1); 616 } 617 618 if (le16toh(sc->hid_desc.wReportDescLength) <= 0) { 619 aprint_error_dev(sc->sc_dev, 620 "bad HID report descriptor size (%d)\n", 621 le16toh(sc->hid_desc.wReportDescLength)); 622 return (1); 623 } 624 625 while (retries-- > 0) { 626 if (ihidev_reset(sc, false)) { 627 if (retries == 0) 628 return(1); 629 630 DELAY(1000); 631 } 632 else 633 break; 634 } 635 636 sc->sc_reportlen = le16toh(sc->hid_desc.wReportDescLength); 637 sc->sc_report = kmem_zalloc(sc->sc_reportlen, KM_NOSLEEP); 638 639 if (ihidev_hid_command(sc, I2C_HID_REPORT_DESCR, 0, false)) { 640 aprint_error_dev(sc->sc_dev, "failed fetching HID report\n"); 641 return (1); 642 } 643 644 return (0); 645 } 646 647 static bool 648 ihiddev_intr_init(struct ihidev_softc *sc) 649 { 650 #if NACPICA > 0 651 ACPI_HANDLE hdl = devhandle_to_acpi(device_handle(sc->sc_dev)); 652 struct acpi_resources res; 653 ACPI_STATUS rv; 654 char buf[100]; 655 656 rv = acpi_resource_parse(sc->sc_dev, hdl, "_CRS", &res, 657 &acpi_resource_parse_ops_quiet); 658 if (ACPI_FAILURE(rv)) { 659 aprint_error_dev(sc->sc_dev, "can't parse '_CRS'\n"); 660 return false; 661 } 662 663 const struct acpi_irq * const irq = acpi_res_irq(&res, 0); 664 if (irq == NULL) { 665 aprint_error_dev(sc->sc_dev, "no IRQ resource\n"); 666 acpi_resource_cleanup(&res); 667 return false; 668 } 669 670 sc->sc_intr_type = 671 irq->ar_type == ACPI_EDGE_SENSITIVE ? IST_EDGE : IST_LEVEL; 672 673 acpi_resource_cleanup(&res); 674 675 sc->sc_ih = acpi_intr_establish(sc->sc_dev, (uint64_t)hdl, IPL_TTY, 676 false, ihidev_intr, sc, device_xname(sc->sc_dev)); 677 if (sc->sc_ih == NULL) { 678 aprint_error_dev(sc->sc_dev, "can't establish interrupt\n"); 679 return false; 680 } 681 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", 682 acpi_intr_string(sc->sc_ih, buf, sizeof(buf))); 683 684 sc->sc_sih = softint_establish(SOFTINT_SERIAL, ihidev_softintr, sc); 685 if (sc->sc_sih == NULL) { 686 aprint_error_dev(sc->sc_dev, 687 "can't establish soft interrupt\n"); 688 return false; 689 } 690 691 return true; 692 #else 693 aprint_error_dev(sc->sc_dev, "can't establish interrupt\n"); 694 return false; 695 #endif 696 } 697 698 static void 699 ihiddev_intr_fini(struct ihidev_softc *sc) 700 { 701 #if NACPICA > 0 702 if (sc->sc_ih != NULL) { 703 acpi_intr_disestablish(sc->sc_ih); 704 } 705 if (sc->sc_sih != NULL) { 706 softint_disestablish(sc->sc_sih); 707 } 708 #endif 709 } 710 711 static void 712 ihidev_intr_mask(struct ihidev_softc * const sc) 713 { 714 715 if (sc->sc_intr_type == IST_LEVEL) { 716 #if NACPICA > 0 717 acpi_intr_mask(sc->sc_ih); 718 #endif 719 } 720 } 721 722 static void 723 ihidev_intr_unmask(struct ihidev_softc * const sc) 724 { 725 726 if (sc->sc_intr_type == IST_LEVEL) { 727 #if NACPICA > 0 728 acpi_intr_unmask(sc->sc_ih); 729 #endif 730 } 731 } 732 733 static int 734 ihidev_intr(void *arg) 735 { 736 struct ihidev_softc * const sc = arg; 737 738 mutex_enter(&sc->sc_intr_lock); 739 740 /* 741 * Schedule our soft interrupt handler. If we're using a level- 742 * triggered interrupt, we have to mask it off while we wait 743 * for service. 744 */ 745 softint_schedule(sc->sc_sih); 746 ihidev_intr_mask(sc); 747 748 mutex_exit(&sc->sc_intr_lock); 749 750 return 1; 751 } 752 753 static void 754 ihidev_softintr(void *arg) 755 { 756 struct ihidev_softc * const sc = arg; 757 struct ihidev *scd; 758 u_int psize; 759 int res, i; 760 u_char *p; 761 u_int rep = 0; 762 763 mutex_enter(&sc->sc_intr_lock); 764 iic_acquire_bus(sc->sc_tag, 0); 765 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, NULL, 0, 766 sc->sc_ibuf, sc->sc_isize, 0); 767 iic_release_bus(sc->sc_tag, 0); 768 mutex_exit(&sc->sc_intr_lock); 769 770 if (res != 0) 771 goto out; 772 773 /* 774 * 6.1.1 - First two bytes are the packet length, which must be less 775 * than or equal to wMaxInputLength 776 */ 777 psize = sc->sc_ibuf[0] | sc->sc_ibuf[1] << 8; 778 if (!psize || psize > sc->sc_isize) { 779 DPRINTF(("%s: %s: invalid packet size (%d vs. %d)\n", 780 sc->sc_dev.dv_xname, __func__, psize, sc->sc_isize)); 781 goto out; 782 } 783 784 /* 3rd byte is the report id */ 785 p = sc->sc_ibuf + 2; 786 psize -= 2; 787 if (sc->sc_nrepid != 1) 788 rep = *p++, psize--; 789 790 if (rep >= sc->sc_nrepid) { 791 aprint_error_dev(sc->sc_dev, "%s: bad report id %d\n", 792 __func__, rep); 793 goto out; 794 } 795 796 DPRINTF(("%s: %s: hid input (rep %d):", sc->sc_dev.dv_xname, 797 __func__, rep)); 798 for (i = 0; i < sc->sc_isize; i++) 799 DPRINTF((" %.2x", sc->sc_ibuf[i])); 800 DPRINTF(("\n")); 801 802 scd = sc->sc_subdevs[rep]; 803 if (scd == NULL || !(scd->sc_state & IHIDEV_OPEN)) 804 goto out; 805 806 scd->sc_intr(scd, p, psize); 807 808 out: 809 /* 810 * If our interrupt is level-triggered, re-enable it now. 811 */ 812 ihidev_intr_unmask(sc); 813 } 814 815 static int 816 ihidev_maxrepid(void *buf, int len) 817 { 818 struct hid_data *d; 819 struct hid_item h; 820 int maxid; 821 822 maxid = -1; 823 h.report_ID = 0; 824 for (d = hid_start_parse(buf, len, hid_none); hid_get_item(d, &h); ) 825 if ((int)h.report_ID > maxid) 826 maxid = h.report_ID; 827 hid_end_parse(d); 828 829 return (maxid); 830 } 831 832 static int 833 ihidev_print(void *aux, const char *pnp) 834 { 835 struct ihidev_attach_arg *iha = aux; 836 837 if (iha->reportid == IHIDEV_CLAIM_ALLREPORTID) 838 return (QUIET); 839 840 if (pnp) 841 aprint_normal("hid at %s", pnp); 842 843 if (iha->reportid != 0) 844 aprint_normal(" reportid %d", iha->reportid); 845 846 return (UNCONF); 847 } 848 849 static int 850 ihidev_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 851 { 852 struct ihidev_attach_arg *iha = aux; 853 854 if (cf->ihidevcf_reportid != IHIDEV_UNK_REPORTID && 855 cf->ihidevcf_reportid != iha->reportid) 856 return (0); 857 858 return config_match(parent, cf, aux); 859 } 860 861 int 862 ihidev_open(struct ihidev *scd) 863 { 864 struct ihidev_softc *sc = scd->sc_parent; 865 866 DPRINTF(("%s: %s: state=%d refcnt=%d\n", sc->sc_dev.dv_xname, 867 __func__, scd->sc_state, sc->sc_refcnt)); 868 869 if (scd->sc_state & IHIDEV_OPEN) 870 return (EBUSY); 871 872 scd->sc_state |= IHIDEV_OPEN; 873 874 if (sc->sc_refcnt++ || sc->sc_isize == 0) 875 return (0); 876 877 /* power on */ 878 ihidev_reset(sc, false); 879 880 return (0); 881 } 882 883 void 884 ihidev_close(struct ihidev *scd) 885 { 886 struct ihidev_softc *sc = scd->sc_parent; 887 888 DPRINTF(("%s: %s: state=%d refcnt=%d\n", sc->sc_dev.dv_xname, 889 __func__, scd->sc_state, sc->sc_refcnt)); 890 891 if (!(scd->sc_state & IHIDEV_OPEN)) 892 return; 893 894 scd->sc_state &= ~IHIDEV_OPEN; 895 896 if (--sc->sc_refcnt) 897 return; 898 899 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 900 &I2C_HID_POWER_OFF, false)) 901 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 902 } 903 904 void 905 ihidev_get_report_desc(struct ihidev_softc *sc, void **desc, int *size) 906 { 907 *desc = sc->sc_report; 908 *size = sc->sc_reportlen; 909 } 910 911 /* convert hid_* constants used throughout HID code to i2c HID equivalents */ 912 int 913 ihidev_report_type_conv(int hid_type_id) 914 { 915 switch (hid_type_id) { 916 case hid_input: 917 return I2C_HID_REPORT_TYPE_INPUT; 918 case hid_output: 919 return I2C_HID_REPORT_TYPE_OUTPUT; 920 case hid_feature: 921 return I2C_HID_REPORT_TYPE_FEATURE; 922 default: 923 return -1; 924 } 925 } 926 927 int 928 ihidev_get_report(struct device *dev, int type, int id, void *data, int len) 929 { 930 struct ihidev_softc *sc = (struct ihidev_softc *)dev; 931 struct i2c_hid_report_request rreq; 932 int ctype; 933 934 if ((ctype = ihidev_report_type_conv(type)) < 0) 935 return (1); 936 937 rreq.type = ctype; 938 rreq.id = id; 939 rreq.data = data; 940 rreq.len = len; 941 942 if (ihidev_hid_command(sc, I2C_HID_CMD_GET_REPORT, &rreq, false)) { 943 aprint_error_dev(sc->sc_dev, "failed fetching report\n"); 944 return (1); 945 } 946 947 return 0; 948 } 949 950 int 951 ihidev_set_report(struct device *dev, int type, int id, void *data, 952 int len) 953 { 954 struct ihidev_softc *sc = (struct ihidev_softc *)dev; 955 struct i2c_hid_report_request rreq; 956 int ctype; 957 958 if ((ctype = ihidev_report_type_conv(type)) < 0) 959 return (1); 960 961 rreq.type = ctype; 962 rreq.id = id; 963 rreq.data = data; 964 rreq.len = len; 965 966 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_REPORT, &rreq, false)) { 967 aprint_error_dev(sc->sc_dev, "failed setting report\n"); 968 return (1); 969 } 970 971 return 0; 972 } 973 974 static bool 975 ihidev_acpi_get_info(struct ihidev_softc *sc) 976 { 977 ACPI_HANDLE hdl = devhandle_to_acpi(device_handle(sc->sc_dev)); 978 ACPI_STATUS status; 979 ACPI_INTEGER val; 980 981 /* 3cdff6f7-4267-4555-ad05-b30a3d8938de */ 982 uint8_t i2c_hid_guid[] = { 983 0xF7, 0xF6, 0xDF, 0x3C, 984 0x67, 0x42, 985 0x55, 0x45, 986 0xAD, 0x05, 987 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE, 988 }; 989 990 status = acpi_dsm_integer(hdl, i2c_hid_guid, 1, 1, NULL, &val); 991 if (ACPI_FAILURE(status)) { 992 aprint_error_dev(sc->sc_dev, 993 "failed to get HidDescriptorAddress: %s\n", 994 AcpiFormatException(status)); 995 return false; 996 } 997 998 sc->sc_hid_desc_addr = (u_int)val; 999 1000 return true; 1001 } 1002
Indexes created Tue Sep 30 07:10:03 GMT 2025