ihidev.c revision 1.20
1 /* $NetBSD: ihidev.c,v 1.20 2021/08/07 16:19:11 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 2021/08/07 16:19:11 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 sc->sc_phandle = ia->ia_cookie; 166 if (ia->ia_cookietype != I2C_COOKIE_ACPI) { 167 aprint_error(": unsupported device tree type\n"); 168 return; 169 } 170 if (! ihidev_acpi_get_info(sc)) { 171 return; 172 } 173 174 if (ihidev_hid_command(sc, I2C_HID_CMD_DESCR, NULL, false) || 175 ihidev_hid_desc_parse(sc)) { 176 aprint_error(": failed fetching initial HID descriptor\n"); 177 return; 178 } 179 180 aprint_naive("\n"); 181 aprint_normal(": vendor 0x%x product 0x%x, %s\n", 182 le16toh(sc->hid_desc.wVendorID), le16toh(sc->hid_desc.wProductID), 183 ia->ia_name); 184 185 sc->sc_nrepid = ihidev_maxrepid(sc->sc_report, sc->sc_reportlen); 186 if (sc->sc_nrepid < 0) 187 return; 188 189 aprint_normal_dev(self, "%d report id%s\n", sc->sc_nrepid, 190 sc->sc_nrepid > 1 ? "s" : ""); 191 192 sc->sc_nrepid++; 193 sc->sc_subdevs = kmem_zalloc(sc->sc_nrepid * sizeof(struct ihidev *), 194 KM_SLEEP); 195 196 /* find largest report size and allocate memory for input buffer */ 197 sc->sc_isize = le16toh(sc->hid_desc.wMaxInputLength); 198 for (repid = 0; repid < sc->sc_nrepid; repid++) { 199 repsz = hid_report_size(sc->sc_report, sc->sc_reportlen, 200 hid_input, repid); 201 202 isize = repsz + 2; /* two bytes for the length */ 203 isize += (sc->sc_nrepid != 1); /* one byte for the report ID */ 204 if (isize > sc->sc_isize) 205 sc->sc_isize = isize; 206 207 DPRINTF(("%s: repid %d size %d\n", sc->sc_dev.dv_xname, repid, 208 repsz)); 209 } 210 sc->sc_ibuf = kmem_zalloc(sc->sc_isize, KM_SLEEP); 211 if (! ihiddev_intr_init(sc)) { 212 return; 213 } 214 215 iha.iaa = ia; 216 iha.parent = sc; 217 218 /* Look for a driver claiming all report IDs first. */ 219 iha.reportid = IHIDEV_CLAIM_ALLREPORTID; 220 locs[IHIDBUSCF_REPORTID] = IHIDEV_CLAIM_ALLREPORTID; 221 dev = config_found(self, &iha, ihidev_print, 222 CFARGS(.submatch = ihidev_submatch, 223 .locators = locs)); 224 if (dev != NULL) { 225 for (repid = 0; repid < sc->sc_nrepid; repid++) 226 sc->sc_subdevs[repid] = device_private(dev); 227 return; 228 } 229 230 for (repid = 0; repid < sc->sc_nrepid; repid++) { 231 if (hid_report_size(sc->sc_report, sc->sc_reportlen, hid_input, 232 repid) == 0 && 233 hid_report_size(sc->sc_report, sc->sc_reportlen, 234 hid_output, repid) == 0 && 235 hid_report_size(sc->sc_report, sc->sc_reportlen, 236 hid_feature, repid) == 0) 237 continue; 238 239 iha.reportid = repid; 240 locs[IHIDBUSCF_REPORTID] = repid; 241 dev = config_found(self, &iha, ihidev_print, 242 CFARGS(.submatch = ihidev_submatch, 243 .locators = locs)); 244 sc->sc_subdevs[repid] = device_private(dev); 245 } 246 247 /* power down until we're opened */ 248 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, &I2C_HID_POWER_OFF, false)) { 249 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 250 return; 251 } 252 if (!pmf_device_register(self, ihidev_suspend, ihidev_resume)) 253 aprint_error_dev(self, "couldn't establish power handler\n"); 254 } 255 256 static int 257 ihidev_detach(device_t self, int flags) 258 { 259 struct ihidev_softc *sc = device_private(self); 260 261 mutex_enter(&sc->sc_intr_lock); 262 ihiddev_intr_fini(sc); 263 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 264 &I2C_HID_POWER_OFF, true)) 265 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 266 mutex_exit(&sc->sc_intr_lock); 267 if (sc->sc_ibuf != NULL) { 268 kmem_free(sc->sc_ibuf, sc->sc_isize); 269 sc->sc_ibuf = NULL; 270 } 271 272 if (sc->sc_report != NULL) 273 kmem_free(sc->sc_report, sc->sc_reportlen); 274 275 pmf_device_deregister(self); 276 return (0); 277 } 278 279 static bool 280 ihidev_suspend(device_t self, const pmf_qual_t *q) 281 { 282 struct ihidev_softc *sc = device_private(self); 283 284 mutex_enter(&sc->sc_intr_lock); 285 if (sc->sc_refcnt > 0) { 286 printf("ihidev power off\n"); 287 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 288 &I2C_HID_POWER_OFF, true)) 289 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 290 } 291 mutex_exit(&sc->sc_intr_lock); 292 return true; 293 } 294 295 static bool 296 ihidev_resume(device_t self, const pmf_qual_t *q) 297 { 298 struct ihidev_softc *sc = device_private(self); 299 300 mutex_enter(&sc->sc_intr_lock); 301 if (sc->sc_refcnt > 0) { 302 printf("ihidev power reset\n"); 303 ihidev_reset(sc, true); 304 } 305 mutex_exit(&sc->sc_intr_lock); 306 return true; 307 } 308 309 static int 310 ihidev_hid_command(struct ihidev_softc *sc, int hidcmd, void *arg, bool poll) 311 { 312 int i, res = 1; 313 int flags = poll ? I2C_F_POLL : 0; 314 315 iic_acquire_bus(sc->sc_tag, flags); 316 317 switch (hidcmd) { 318 case I2C_HID_CMD_DESCR: { 319 /* 320 * 5.2.2 - HID Descriptor Retrieval 321 * register is passed from the controller 322 */ 323 uint8_t cmd[] = { 324 htole16(sc->sc_hid_desc_addr) & 0xff, 325 htole16(sc->sc_hid_desc_addr) >> 8, 326 }; 327 328 DPRINTF(("%s: HID command I2C_HID_CMD_DESCR at 0x%x\n", 329 sc->sc_dev.dv_xname, htole16(sc->sc_hid_desc_addr))); 330 331 /* 20 00 */ 332 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 333 &cmd, sizeof(cmd), &sc->hid_desc_buf, 334 sizeof(struct i2c_hid_desc), flags); 335 336 DPRINTF(("%s: HID descriptor:", sc->sc_dev.dv_xname)); 337 for (i = 0; i < sizeof(struct i2c_hid_desc); i++) 338 DPRINTF((" %.2x", sc->hid_desc_buf[i])); 339 DPRINTF(("\n")); 340 341 break; 342 } 343 case I2C_HID_CMD_RESET: { 344 uint8_t cmd[] = { 345 htole16(sc->hid_desc.wCommandRegister) & 0xff, 346 htole16(sc->hid_desc.wCommandRegister) >> 8, 347 0, 348 I2C_HID_CMD_RESET, 349 }; 350 351 DPRINTF(("%s: HID command I2C_HID_CMD_RESET\n", 352 sc->sc_dev.dv_xname)); 353 354 /* 22 00 00 01 */ 355 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 356 &cmd, sizeof(cmd), NULL, 0, flags); 357 358 break; 359 } 360 case I2C_HID_CMD_GET_REPORT: { 361 struct i2c_hid_report_request *rreq = 362 (struct i2c_hid_report_request *)arg; 363 364 uint8_t cmd[] = { 365 htole16(sc->hid_desc.wCommandRegister) & 0xff, 366 htole16(sc->hid_desc.wCommandRegister) >> 8, 367 0, 368 I2C_HID_CMD_GET_REPORT, 369 0, 0, 0, 370 }; 371 int cmdlen = 7; 372 int dataoff = 4; 373 int report_id = rreq->id; 374 int report_id_len = 1; 375 int report_len = rreq->len + 2; 376 int d; 377 uint8_t *tmprep; 378 379 DPRINTF(("%s: HID command I2C_HID_CMD_GET_REPORT %d " 380 "(type %d, len %d)\n", sc->sc_dev.dv_xname, report_id, 381 rreq->type, rreq->len)); 382 383 /* 384 * 7.2.2.4 - "The protocol is optimized for Report < 15. If a 385 * report ID >= 15 is necessary, then the Report ID in the Low 386 * Byte must be set to 1111 and a Third Byte is appended to the 387 * protocol. This Third Byte contains the entire/actual report 388 * ID." 389 */ 390 if (report_id >= 15) { 391 cmd[dataoff++] = report_id; 392 report_id = 15; 393 report_id_len = 2; 394 } else 395 cmdlen--; 396 397 cmd[2] = report_id | rreq->type << 4; 398 399 cmd[dataoff++] = sc->hid_desc.wDataRegister & 0xff; 400 cmd[dataoff] = sc->hid_desc.wDataRegister >> 8; 401 402 /* 403 * 7.2.2.2 - Response will be a 2-byte length value, the report 404 * id with length determined above, and then the report. 405 * Allocate rreq->len + 2 + 2 bytes, read into that temporary 406 * buffer, and then copy only the report back out to 407 * rreq->data. 408 */ 409 report_len += report_id_len; 410 tmprep = kmem_zalloc(report_len, KM_NOSLEEP); 411 412 /* type 3 id 8: 22 00 38 02 23 00 */ 413 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 414 &cmd, cmdlen, tmprep, report_len, flags); 415 416 d = tmprep[0] | tmprep[1] << 8; 417 if (d != report_len) { 418 DPRINTF(("%s: response size %d != expected length %d\n", 419 sc->sc_dev.dv_xname, d, report_len)); 420 } 421 422 if (report_id_len == 2) 423 d = tmprep[2] | tmprep[3] << 8; 424 else 425 d = tmprep[2]; 426 427 if (d != rreq->id) { 428 DPRINTF(("%s: response report id %d != %d\n", 429 sc->sc_dev.dv_xname, d, rreq->id)); 430 iic_release_bus(sc->sc_tag, 0); 431 kmem_free(tmprep, report_len); 432 return (1); 433 } 434 435 DPRINTF(("%s: response:", sc->sc_dev.dv_xname)); 436 for (i = 0; i < report_len; i++) 437 DPRINTF((" %.2x", tmprep[i])); 438 DPRINTF(("\n")); 439 440 memcpy(rreq->data, tmprep + 2 + report_id_len, rreq->len); 441 kmem_free(tmprep, report_len); 442 443 break; 444 } 445 case I2C_HID_CMD_SET_REPORT: { 446 struct i2c_hid_report_request *rreq = 447 (struct i2c_hid_report_request *)arg; 448 449 uint8_t cmd[] = { 450 htole16(sc->hid_desc.wCommandRegister) & 0xff, 451 htole16(sc->hid_desc.wCommandRegister) >> 8, 452 0, 453 I2C_HID_CMD_SET_REPORT, 454 0, 0, 0, 0, 0, 0, 455 }; 456 int cmdlen = 10; 457 int report_id = rreq->id; 458 int report_len = 2 + (report_id ? 1 : 0) + rreq->len; 459 int dataoff; 460 uint8_t *finalcmd; 461 462 DPRINTF(("%s: HID command I2C_HID_CMD_SET_REPORT %d " 463 "(type %d, len %d):", sc->sc_dev.dv_xname, report_id, 464 rreq->type, rreq->len)); 465 for (i = 0; i < rreq->len; i++) 466 DPRINTF((" %.2x", ((uint8_t *)rreq->data)[i])); 467 DPRINTF(("\n")); 468 469 /* 470 * 7.2.2.4 - "The protocol is optimized for Report < 15. If a 471 * report ID >= 15 is necessary, then the Report ID in the Low 472 * Byte must be set to 1111 and a Third Byte is appended to the 473 * protocol. This Third Byte contains the entire/actual report 474 * ID." 475 */ 476 dataoff = 4; 477 if (report_id >= 15) { 478 cmd[dataoff++] = report_id; 479 report_id = 15; 480 } else 481 cmdlen--; 482 483 cmd[2] = report_id | rreq->type << 4; 484 485 if (rreq->type == I2C_HID_REPORT_TYPE_FEATURE) { 486 cmd[dataoff++] = htole16(sc->hid_desc.wDataRegister) 487 & 0xff; 488 cmd[dataoff++] = htole16(sc->hid_desc.wDataRegister) 489 >> 8; 490 } else { 491 cmd[dataoff++] = htole16(sc->hid_desc.wOutputRegister) 492 & 0xff; 493 cmd[dataoff++] = htole16(sc->hid_desc.wOutputRegister) 494 >> 8; 495 } 496 497 cmd[dataoff++] = report_len & 0xff; 498 cmd[dataoff++] = report_len >> 8; 499 cmd[dataoff] = rreq->id; 500 501 finalcmd = kmem_zalloc(cmdlen + rreq->len, KM_NOSLEEP); 502 503 memcpy(finalcmd, cmd, cmdlen); 504 memcpy(finalcmd + cmdlen, rreq->data, rreq->len); 505 506 /* type 3 id 4: 22 00 34 03 23 00 04 00 04 03 */ 507 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 508 finalcmd, cmdlen + rreq->len, NULL, 0, flags); 509 kmem_free(finalcmd, cmdlen + rreq->len); 510 511 break; 512 } 513 514 case I2C_HID_CMD_SET_POWER: { 515 int power = *(int *)arg; 516 uint8_t cmd[] = { 517 htole16(sc->hid_desc.wCommandRegister) & 0xff, 518 htole16(sc->hid_desc.wCommandRegister) >> 8, 519 power, 520 I2C_HID_CMD_SET_POWER, 521 }; 522 523 DPRINTF(("%s: HID command I2C_HID_CMD_SET_POWER(%d)\n", 524 sc->sc_dev.dv_xname, power)); 525 526 /* 22 00 00 08 */ 527 res = iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 528 &cmd, sizeof(cmd), NULL, 0, flags); 529 530 break; 531 } 532 case I2C_HID_REPORT_DESCR: { 533 uint8_t cmd[] = { 534 htole16(sc->hid_desc.wReportDescRegister) & 0xff, 535 htole16(sc->hid_desc.wReportDescRegister) >> 8, 536 }; 537 538 DPRINTF(("%s: HID command I2C_HID_REPORT_DESCR at 0x%x with " 539 "size %d\n", sc->sc_dev.dv_xname, cmd[0], 540 sc->sc_reportlen)); 541 542 /* 20 00 */ 543 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 544 &cmd, sizeof(cmd), sc->sc_report, sc->sc_reportlen, flags); 545 546 DPRINTF(("%s: HID report descriptor:", sc->sc_dev.dv_xname)); 547 for (i = 0; i < sc->sc_reportlen; i++) 548 DPRINTF((" %.2x", sc->sc_report[i])); 549 DPRINTF(("\n")); 550 551 break; 552 } 553 default: 554 aprint_error_dev(sc->sc_dev, "unknown command %d\n", 555 hidcmd); 556 } 557 558 iic_release_bus(sc->sc_tag, flags); 559 560 return (res); 561 } 562 563 static int 564 ihidev_reset(struct ihidev_softc *sc, bool poll) 565 { 566 DPRINTF(("%s: resetting\n", sc->sc_dev.dv_xname)); 567 568 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 569 &I2C_HID_POWER_ON, poll)) { 570 aprint_error_dev(sc->sc_dev, "failed to power on\n"); 571 return (1); 572 } 573 574 DELAY(1000); 575 576 if (ihidev_hid_command(sc, I2C_HID_CMD_RESET, 0, poll)) { 577 aprint_error_dev(sc->sc_dev, "failed to reset hardware\n"); 578 579 ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 580 &I2C_HID_POWER_OFF, poll); 581 582 return (1); 583 } 584 585 DELAY(1000); 586 587 return (0); 588 } 589 590 /* 591 * 5.2.2 - HID Descriptor Retrieval 592 * 593 * parse HID Descriptor that has already been read into hid_desc with 594 * I2C_HID_CMD_DESCR 595 */ 596 static int 597 ihidev_hid_desc_parse(struct ihidev_softc *sc) 598 { 599 int retries = 3; 600 601 /* must be v01.00 */ 602 if (le16toh(sc->hid_desc.bcdVersion) != 0x0100) { 603 aprint_error_dev(sc->sc_dev, 604 "bad HID descriptor bcdVersion (0x%x)\n", 605 le16toh(sc->hid_desc.bcdVersion)); 606 return (1); 607 } 608 609 /* must be 30 bytes for v1.00 */ 610 if (le16toh(sc->hid_desc.wHIDDescLength != 611 sizeof(struct i2c_hid_desc))) { 612 aprint_error_dev(sc->sc_dev, 613 "bad HID descriptor size (%d != %zu)\n", 614 le16toh(sc->hid_desc.wHIDDescLength), 615 sizeof(struct i2c_hid_desc)); 616 return (1); 617 } 618 619 if (le16toh(sc->hid_desc.wReportDescLength) <= 0) { 620 aprint_error_dev(sc->sc_dev, 621 "bad HID report descriptor size (%d)\n", 622 le16toh(sc->hid_desc.wReportDescLength)); 623 return (1); 624 } 625 626 while (retries-- > 0) { 627 if (ihidev_reset(sc, false)) { 628 if (retries == 0) 629 return(1); 630 631 DELAY(1000); 632 } 633 else 634 break; 635 } 636 637 sc->sc_reportlen = le16toh(sc->hid_desc.wReportDescLength); 638 sc->sc_report = kmem_zalloc(sc->sc_reportlen, KM_NOSLEEP); 639 640 if (ihidev_hid_command(sc, I2C_HID_REPORT_DESCR, 0, false)) { 641 aprint_error_dev(sc->sc_dev, "failed fetching HID report\n"); 642 return (1); 643 } 644 645 return (0); 646 } 647 648 static bool 649 ihiddev_intr_init(struct ihidev_softc *sc) 650 { 651 #if NACPICA > 0 652 ACPI_HANDLE hdl = (void *)(uintptr_t)sc->sc_phandle; 653 struct acpi_resources res; 654 ACPI_STATUS rv; 655 char buf[100]; 656 657 rv = acpi_resource_parse(sc->sc_dev, hdl, "_CRS", &res, 658 &acpi_resource_parse_ops_quiet); 659 if (ACPI_FAILURE(rv)) { 660 aprint_error_dev(sc->sc_dev, "can't parse '_CRS'\n"); 661 return false; 662 } 663 664 const struct acpi_irq * const irq = acpi_res_irq(&res, 0); 665 if (irq == NULL) { 666 aprint_error_dev(sc->sc_dev, "no IRQ resource\n"); 667 acpi_resource_cleanup(&res); 668 return false; 669 } 670 671 sc->sc_intr_type = 672 irq->ar_type == ACPI_EDGE_SENSITIVE ? IST_EDGE : IST_LEVEL; 673 674 acpi_resource_cleanup(&res); 675 676 sc->sc_ih = acpi_intr_establish(sc->sc_dev, sc->sc_phandle, IPL_TTY, 677 false, ihidev_intr, sc, device_xname(sc->sc_dev)); 678 if (sc->sc_ih == NULL) { 679 aprint_error_dev(sc->sc_dev, "can't establish interrupt\n"); 680 return false; 681 } 682 aprint_normal_dev(sc->sc_dev, "interrupting at %s\n", 683 acpi_intr_string(sc->sc_ih, buf, sizeof(buf))); 684 685 sc->sc_sih = softint_establish(SOFTINT_SERIAL, ihidev_softintr, sc); 686 if (sc->sc_sih == NULL) { 687 aprint_error_dev(sc->sc_dev, 688 "can't establish soft interrupt\n"); 689 return false; 690 } 691 692 return true; 693 #else 694 aprint_error_dev(sc->sc_dev, "can't establish interrupt\n"); 695 return false; 696 #endif 697 } 698 699 static void 700 ihiddev_intr_fini(struct ihidev_softc *sc) 701 { 702 #if NACPICA > 0 703 if (sc->sc_ih != NULL) { 704 acpi_intr_disestablish(sc->sc_ih); 705 } 706 if (sc->sc_sih != NULL) { 707 softint_disestablish(sc->sc_sih); 708 } 709 #endif 710 } 711 712 static void 713 ihidev_intr_mask(struct ihidev_softc * const sc) 714 { 715 716 if (sc->sc_intr_type == IST_LEVEL) { 717 #if NACPICA > 0 718 acpi_intr_mask(sc->sc_ih); 719 #endif 720 } 721 } 722 723 static void 724 ihidev_intr_unmask(struct ihidev_softc * const sc) 725 { 726 727 if (sc->sc_intr_type == IST_LEVEL) { 728 #if NACPICA > 0 729 acpi_intr_unmask(sc->sc_ih); 730 #endif 731 } 732 } 733 734 static int 735 ihidev_intr(void *arg) 736 { 737 struct ihidev_softc * const sc = arg; 738 739 mutex_enter(&sc->sc_intr_lock); 740 741 /* 742 * Schedule our soft interrupt handler. If we're using a level- 743 * triggered interrupt, we have to mask it off while we wait 744 * for service. 745 */ 746 softint_schedule(sc->sc_sih); 747 ihidev_intr_mask(sc); 748 749 mutex_exit(&sc->sc_intr_lock); 750 751 return 1; 752 } 753 754 static void 755 ihidev_softintr(void *arg) 756 { 757 struct ihidev_softc * const sc = arg; 758 struct ihidev *scd; 759 u_int psize; 760 int res, i; 761 u_char *p; 762 u_int rep = 0; 763 764 mutex_enter(&sc->sc_intr_lock); 765 iic_acquire_bus(sc->sc_tag, 0); 766 res = iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, NULL, 0, 767 sc->sc_ibuf, sc->sc_isize, 0); 768 iic_release_bus(sc->sc_tag, 0); 769 mutex_exit(&sc->sc_intr_lock); 770 771 if (res != 0) 772 goto out; 773 774 /* 775 * 6.1.1 - First two bytes are the packet length, which must be less 776 * than or equal to wMaxInputLength 777 */ 778 psize = sc->sc_ibuf[0] | sc->sc_ibuf[1] << 8; 779 if (!psize || psize > sc->sc_isize) { 780 DPRINTF(("%s: %s: invalid packet size (%d vs. %d)\n", 781 sc->sc_dev.dv_xname, __func__, psize, sc->sc_isize)); 782 goto out; 783 } 784 785 /* 3rd byte is the report id */ 786 p = sc->sc_ibuf + 2; 787 psize -= 2; 788 if (sc->sc_nrepid != 1) 789 rep = *p++, psize--; 790 791 if (rep >= sc->sc_nrepid) { 792 aprint_error_dev(sc->sc_dev, "%s: bad report id %d\n", 793 __func__, rep); 794 goto out; 795 } 796 797 DPRINTF(("%s: %s: hid input (rep %d):", sc->sc_dev.dv_xname, 798 __func__, rep)); 799 for (i = 0; i < sc->sc_isize; i++) 800 DPRINTF((" %.2x", sc->sc_ibuf[i])); 801 DPRINTF(("\n")); 802 803 scd = sc->sc_subdevs[rep]; 804 if (scd == NULL || !(scd->sc_state & IHIDEV_OPEN)) 805 goto out; 806 807 scd->sc_intr(scd, p, psize); 808 809 out: 810 /* 811 * If our interrupt is level-triggered, re-enable it now. 812 */ 813 ihidev_intr_unmask(sc); 814 } 815 816 static int 817 ihidev_maxrepid(void *buf, int len) 818 { 819 struct hid_data *d; 820 struct hid_item h; 821 int maxid; 822 823 maxid = -1; 824 h.report_ID = 0; 825 for (d = hid_start_parse(buf, len, hid_none); hid_get_item(d, &h); ) 826 if ((int)h.report_ID > maxid) 827 maxid = h.report_ID; 828 hid_end_parse(d); 829 830 return (maxid); 831 } 832 833 static int 834 ihidev_print(void *aux, const char *pnp) 835 { 836 struct ihidev_attach_arg *iha = aux; 837 838 if (iha->reportid == IHIDEV_CLAIM_ALLREPORTID) 839 return (QUIET); 840 841 if (pnp) 842 aprint_normal("hid at %s", pnp); 843 844 if (iha->reportid != 0) 845 aprint_normal(" reportid %d", iha->reportid); 846 847 return (UNCONF); 848 } 849 850 static int 851 ihidev_submatch(device_t parent, cfdata_t cf, const int *locs, void *aux) 852 { 853 struct ihidev_attach_arg *iha = aux; 854 855 if (cf->ihidevcf_reportid != IHIDEV_UNK_REPORTID && 856 cf->ihidevcf_reportid != iha->reportid) 857 return (0); 858 859 return config_match(parent, cf, aux); 860 } 861 862 int 863 ihidev_open(struct ihidev *scd) 864 { 865 struct ihidev_softc *sc = scd->sc_parent; 866 867 DPRINTF(("%s: %s: state=%d refcnt=%d\n", sc->sc_dev.dv_xname, 868 __func__, scd->sc_state, sc->sc_refcnt)); 869 870 if (scd->sc_state & IHIDEV_OPEN) 871 return (EBUSY); 872 873 scd->sc_state |= IHIDEV_OPEN; 874 875 if (sc->sc_refcnt++ || sc->sc_isize == 0) 876 return (0); 877 878 /* power on */ 879 ihidev_reset(sc, false); 880 881 return (0); 882 } 883 884 void 885 ihidev_close(struct ihidev *scd) 886 { 887 struct ihidev_softc *sc = scd->sc_parent; 888 889 DPRINTF(("%s: %s: state=%d refcnt=%d\n", sc->sc_dev.dv_xname, 890 __func__, scd->sc_state, sc->sc_refcnt)); 891 892 if (!(scd->sc_state & IHIDEV_OPEN)) 893 return; 894 895 scd->sc_state &= ~IHIDEV_OPEN; 896 897 if (--sc->sc_refcnt) 898 return; 899 900 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_POWER, 901 &I2C_HID_POWER_OFF, false)) 902 aprint_error_dev(sc->sc_dev, "failed to power down\n"); 903 } 904 905 void 906 ihidev_get_report_desc(struct ihidev_softc *sc, void **desc, int *size) 907 { 908 *desc = sc->sc_report; 909 *size = sc->sc_reportlen; 910 } 911 912 /* convert hid_* constants used throughout HID code to i2c HID equivalents */ 913 int 914 ihidev_report_type_conv(int hid_type_id) 915 { 916 switch (hid_type_id) { 917 case hid_input: 918 return I2C_HID_REPORT_TYPE_INPUT; 919 case hid_output: 920 return I2C_HID_REPORT_TYPE_OUTPUT; 921 case hid_feature: 922 return I2C_HID_REPORT_TYPE_FEATURE; 923 default: 924 return -1; 925 } 926 } 927 928 int 929 ihidev_get_report(struct device *dev, int type, int id, void *data, int len) 930 { 931 struct ihidev_softc *sc = (struct ihidev_softc *)dev; 932 struct i2c_hid_report_request rreq; 933 int ctype; 934 935 if ((ctype = ihidev_report_type_conv(type)) < 0) 936 return (1); 937 938 rreq.type = ctype; 939 rreq.id = id; 940 rreq.data = data; 941 rreq.len = len; 942 943 if (ihidev_hid_command(sc, I2C_HID_CMD_GET_REPORT, &rreq, false)) { 944 aprint_error_dev(sc->sc_dev, "failed fetching report\n"); 945 return (1); 946 } 947 948 return 0; 949 } 950 951 int 952 ihidev_set_report(struct device *dev, int type, int id, void *data, 953 int len) 954 { 955 struct ihidev_softc *sc = (struct ihidev_softc *)dev; 956 struct i2c_hid_report_request rreq; 957 int ctype; 958 959 if ((ctype = ihidev_report_type_conv(type)) < 0) 960 return (1); 961 962 rreq.type = ctype; 963 rreq.id = id; 964 rreq.data = data; 965 rreq.len = len; 966 967 if (ihidev_hid_command(sc, I2C_HID_CMD_SET_REPORT, &rreq, false)) { 968 aprint_error_dev(sc->sc_dev, "failed setting report\n"); 969 return (1); 970 } 971 972 return 0; 973 } 974 975 static bool 976 ihidev_acpi_get_info(struct ihidev_softc *sc) 977 { 978 ACPI_HANDLE hdl = (void *)(uintptr_t)sc->sc_phandle; 979 ACPI_STATUS status; 980 ACPI_INTEGER val; 981 982 /* 3cdff6f7-4267-4555-ad05-b30a3d8938de */ 983 uint8_t i2c_hid_guid[] = { 984 0xF7, 0xF6, 0xDF, 0x3C, 985 0x67, 0x42, 986 0x55, 0x45, 987 0xAD, 0x05, 988 0xB3, 0x0A, 0x3D, 0x89, 0x38, 0xDE, 989 }; 990 991 status = acpi_dsm_integer(hdl, i2c_hid_guid, 1, 1, NULL, &val); 992 if (ACPI_FAILURE(status)) { 993 aprint_error_dev(sc->sc_dev, 994 "failed to get HidDescriptorAddress: %s\n", 995 AcpiFormatException(status)); 996 return false; 997 } 998 999 sc->sc_hid_desc_addr = (u_int)val; 1000 1001 return true; 1002 } 1003
Indexes created Wed Sep 24 14:09:57 GMT 2025