Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/dev/usb/input/usbhid.c
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1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 3 * 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * Copyright (c) 2019 Vladimir Kondratyev <wulf@FreeBSD.org> 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net) at 9 * Carlstedt Research & Technology. 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 #include <sys/cdefs.h> 34 __FBSDID("$FreeBSD$"); 35 36 /* 37 * HID spec: https://www.usb.org/sites/default/files/documents/hid1_11.pdf 38 */ 39 40 #include <sys/stdint.h> 41 #include <sys/stddef.h> 42 #include <sys/param.h> 43 #include <sys/queue.h> 44 #include <sys/types.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/bus.h> 48 #include <sys/module.h> 49 #include <sys/lock.h> 50 #include <sys/mutex.h> 51 #include <sys/condvar.h> 52 #include <sys/sysctl.h> 53 #include <sys/sx.h> 54 #include <sys/unistd.h> 55 #include <sys/callout.h> 56 #include <sys/malloc.h> 57 #include <sys/priv.h> 58 #include <sys/conf.h> 59 #include <sys/fcntl.h> 60 61 #include <dev/evdev/input.h> 62 63 #include <dev/hid/hid.h> 64 #include <dev/hid/hidquirk.h> 65 66 #include <dev/usb/usb.h> 67 #include <dev/usb/usbdi.h> 68 #include <dev/usb/usbdi_util.h> 69 #include <dev/usb/usbhid.h> 70 #include <dev/usb/usb_core.h> 71 #include <dev/usb/usb_ioctl.h> 72 #include <dev/usb/usb_util.h> 73 74 #define USB_DEBUG_VAR usbhid_debug 75 #include <dev/usb/usb_debug.h> 76 77 #include <dev/usb/quirk/usb_quirk.h> 78 79 #include "hid_if.h" 80 81 static SYSCTL_NODE(_hw_usb, OID_AUTO, usbhid, CTLFLAG_RW, 0, "USB usbhid"); 82 static int usbhid_enable = 0; 83 SYSCTL_INT(_hw_usb_usbhid, OID_AUTO, enable, CTLFLAG_RWTUN, 84 &usbhid_enable, 0, "Enable usbhid and prefer it to other USB HID drivers"); 85 #ifdef USB_DEBUG 86 static int usbhid_debug = 0; 87 SYSCTL_INT(_hw_usb_usbhid, OID_AUTO, debug, CTLFLAG_RWTUN, 88 &usbhid_debug, 0, "Debug level"); 89 #endif 90 91 /* Second set of USB transfers for polling mode */ 92 #define POLL_XFER(xfer) ((xfer) + USBHID_N_TRANSFER) 93 enum { 94 USBHID_INTR_OUT_DT, 95 USBHID_INTR_IN_DT, 96 USBHID_CTRL_DT, 97 USBHID_N_TRANSFER, 98 }; 99 100 struct usbhid_xfer_ctx; 101 typedef int usbhid_callback_t(struct usbhid_xfer_ctx *xfer_ctx); 102 103 union usbhid_device_request { 104 struct { /* INTR xfers */ 105 uint16_t maxlen; 106 uint16_t actlen; 107 } intr; 108 struct usb_device_request ctrl; /* CTRL xfers */ 109 }; 110 111 /* Syncronous USB transfer context */ 112 struct usbhid_xfer_ctx { 113 union usbhid_device_request req; 114 uint8_t *buf; 115 int error; 116 usbhid_callback_t *cb; 117 void *cb_ctx; 118 int waiters; 119 bool influx; 120 }; 121 122 struct usbhid_softc { 123 hid_intr_t *sc_intr_handler; 124 void *sc_intr_ctx; 125 void *sc_intr_buf; 126 127 struct hid_device_info sc_hw; 128 129 struct mtx sc_mtx; 130 struct usb_config sc_config[USBHID_N_TRANSFER]; 131 struct usb_xfer *sc_xfer[POLL_XFER(USBHID_N_TRANSFER)]; 132 struct usbhid_xfer_ctx sc_xfer_ctx[POLL_XFER(USBHID_N_TRANSFER)]; 133 bool sc_can_poll; 134 135 struct usb_device *sc_udev; 136 uint8_t sc_iface_no; 137 uint8_t sc_iface_index; 138 }; 139 140 /* prototypes */ 141 142 static device_probe_t usbhid_probe; 143 static device_attach_t usbhid_attach; 144 static device_detach_t usbhid_detach; 145 146 static usb_callback_t usbhid_intr_out_callback; 147 static usb_callback_t usbhid_intr_in_callback; 148 static usb_callback_t usbhid_ctrl_callback; 149 150 static usbhid_callback_t usbhid_intr_handler_cb; 151 static usbhid_callback_t usbhid_sync_wakeup_cb; 152 153 static void 154 usbhid_intr_out_callback(struct usb_xfer *xfer, usb_error_t error) 155 { 156 struct usbhid_xfer_ctx *xfer_ctx = usbd_xfer_softc(xfer); 157 struct usb_page_cache *pc; 158 int len; 159 160 switch (USB_GET_STATE(xfer)) { 161 case USB_ST_TRANSFERRED: 162 case USB_ST_SETUP: 163 tr_setup: 164 len = xfer_ctx->req.intr.maxlen; 165 if (len == 0) { 166 if (USB_IN_POLLING_MODE_FUNC()) 167 xfer_ctx->error = 0; 168 return; 169 } 170 pc = usbd_xfer_get_frame(xfer, 0); 171 usbd_copy_in(pc, 0, xfer_ctx->buf, len); 172 usbd_xfer_set_frame_len(xfer, 0, len); 173 usbd_transfer_submit(xfer); 174 xfer_ctx->req.intr.maxlen = 0; 175 if (USB_IN_POLLING_MODE_FUNC()) 176 return; 177 xfer_ctx->error = 0; 178 goto tr_exit; 179 180 default: /* Error */ 181 if (error != USB_ERR_CANCELLED) { 182 /* try to clear stall first */ 183 usbd_xfer_set_stall(xfer); 184 goto tr_setup; 185 } 186 xfer_ctx->error = EIO; 187 tr_exit: 188 (void)xfer_ctx->cb(xfer_ctx); 189 return; 190 } 191 } 192 193 static void 194 usbhid_intr_in_callback(struct usb_xfer *xfer, usb_error_t error) 195 { 196 struct usbhid_xfer_ctx *xfer_ctx = usbd_xfer_softc(xfer); 197 struct usb_page_cache *pc; 198 int actlen; 199 200 switch (USB_GET_STATE(xfer)) { 201 case USB_ST_TRANSFERRED: 202 DPRINTF("transferred!\n"); 203 204 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 205 pc = usbd_xfer_get_frame(xfer, 0); 206 usbd_copy_out(pc, 0, xfer_ctx->buf, actlen); 207 xfer_ctx->req.intr.actlen = actlen; 208 if (xfer_ctx->cb(xfer_ctx) != 0) 209 return; 210 211 case USB_ST_SETUP: 212 re_submit: 213 usbd_xfer_set_frame_len(xfer, 0, xfer_ctx->req.intr.maxlen); 214 usbd_transfer_submit(xfer); 215 return; 216 217 default: /* Error */ 218 if (error != USB_ERR_CANCELLED) { 219 /* try to clear stall first */ 220 usbd_xfer_set_stall(xfer); 221 goto re_submit; 222 } 223 return; 224 } 225 } 226 227 static void 228 usbhid_ctrl_callback(struct usb_xfer *xfer, usb_error_t error) 229 { 230 struct usbhid_xfer_ctx *xfer_ctx = usbd_xfer_softc(xfer); 231 struct usb_device_request *req = &xfer_ctx->req.ctrl; 232 struct usb_page_cache *pc; 233 int len = UGETW(req->wLength); 234 bool is_rd = (req->bmRequestType & UT_READ) != 0; 235 236 switch (USB_GET_STATE(xfer)) { 237 case USB_ST_SETUP: 238 if (!is_rd && len != 0) { 239 pc = usbd_xfer_get_frame(xfer, 1); 240 usbd_copy_in(pc, 0, xfer_ctx->buf, len); 241 } 242 243 pc = usbd_xfer_get_frame(xfer, 0); 244 usbd_copy_in(pc, 0, req, sizeof(*req)); 245 usbd_xfer_set_frame_len(xfer, 0, sizeof(*req)); 246 if (len != 0) 247 usbd_xfer_set_frame_len(xfer, 1, len); 248 usbd_xfer_set_frames(xfer, len != 0 ? 2 : 1); 249 usbd_transfer_submit(xfer); 250 return; 251 252 case USB_ST_TRANSFERRED: 253 if (is_rd && len != 0) { 254 pc = usbd_xfer_get_frame(xfer, 0); 255 usbd_copy_out(pc, sizeof(*req), xfer_ctx->buf, len); 256 } 257 xfer_ctx->error = 0; 258 goto tr_exit; 259 260 default: /* Error */ 261 /* bomb out */ 262 DPRINTFN(1, "error=%s\n", usbd_errstr(error)); 263 xfer_ctx->error = EIO; 264 tr_exit: 265 (void)xfer_ctx->cb(xfer_ctx); 266 return; 267 } 268 } 269 270 static int 271 usbhid_intr_handler_cb(struct usbhid_xfer_ctx *xfer_ctx) 272 { 273 struct usbhid_softc *sc = xfer_ctx->cb_ctx; 274 275 sc->sc_intr_handler(sc->sc_intr_ctx, xfer_ctx->buf, 276 xfer_ctx->req.intr.actlen); 277 278 return (0); 279 } 280 281 static int 282 usbhid_sync_wakeup_cb(struct usbhid_xfer_ctx *xfer_ctx) 283 { 284 285 if (!USB_IN_POLLING_MODE_FUNC()) 286 wakeup(xfer_ctx->cb_ctx); 287 288 return (ECANCELED); 289 } 290 291 static const struct usb_config usbhid_config[USBHID_N_TRANSFER] = { 292 293 [USBHID_INTR_OUT_DT] = { 294 .type = UE_INTERRUPT, 295 .endpoint = UE_ADDR_ANY, 296 .direction = UE_DIR_OUT, 297 .flags = {.pipe_bof = 1,.proxy_buffer = 1}, 298 .callback = &usbhid_intr_out_callback, 299 }, 300 [USBHID_INTR_IN_DT] = { 301 .type = UE_INTERRUPT, 302 .endpoint = UE_ADDR_ANY, 303 .direction = UE_DIR_IN, 304 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,.proxy_buffer = 1}, 305 .callback = &usbhid_intr_in_callback, 306 }, 307 [USBHID_CTRL_DT] = { 308 .type = UE_CONTROL, 309 .endpoint = 0x00, /* Control pipe */ 310 .direction = UE_DIR_ANY, 311 .flags = {.proxy_buffer = 1}, 312 .callback = &usbhid_ctrl_callback, 313 .timeout = 1000, /* 1 second */ 314 }, 315 }; 316 317 static inline usb_frlength_t 318 usbhid_xfer_max_len(struct usb_xfer *xfer) 319 { 320 return (xfer == NULL ? 0 : usbd_xfer_max_len(xfer)); 321 } 322 323 static inline int 324 usbhid_xfer_check_len(struct usbhid_softc* sc, int xfer_idx, hid_size_t len) 325 { 326 if (USB_IN_POLLING_MODE_FUNC()) 327 xfer_idx = POLL_XFER(xfer_idx); 328 if (sc->sc_xfer[xfer_idx] == NULL) 329 return (ENODEV); 330 if (len > usbd_xfer_max_len(sc->sc_xfer[xfer_idx])) 331 return (ENOBUFS); 332 return (0); 333 } 334 335 static void 336 usbhid_intr_setup(device_t dev, hid_intr_t intr, void *context, 337 struct hid_rdesc_info *rdesc) 338 { 339 struct usbhid_softc* sc = device_get_softc(dev); 340 uint16_t n; 341 bool nowrite; 342 int error; 343 344 nowrite = hid_test_quirk(&sc->sc_hw, HQ_NOWRITE); 345 346 /* 347 * Setup the USB transfers one by one, so they are memory independent 348 * which allows for handling panics triggered by the HID drivers 349 * itself, typically by hkbd via CTRL+ALT+ESC sequences. Or if the HID 350 * keyboard driver was processing a key at the moment of panic. 351 */ 352 if (intr == NULL) { 353 if (sc->sc_can_poll) 354 return; 355 for (n = 0; n != USBHID_N_TRANSFER; n++) { 356 if (nowrite && n == USBHID_INTR_OUT_DT) 357 continue; 358 error = usbd_transfer_setup(sc->sc_udev, 359 &sc->sc_iface_index, sc->sc_xfer + POLL_XFER(n), 360 sc->sc_config + n, 1, 361 (void *)(sc->sc_xfer_ctx + POLL_XFER(n)), 362 &sc->sc_mtx); 363 if (error) 364 DPRINTF("xfer %d setup error=%s\n", n, 365 usbd_errstr(error)); 366 } 367 mtx_lock(&sc->sc_mtx); 368 if (sc->sc_xfer[USBHID_INTR_IN_DT] != NULL && 369 sc->sc_xfer[USBHID_INTR_IN_DT]->flags_int.started) 370 usbd_transfer_start( 371 sc->sc_xfer[POLL_XFER(USBHID_INTR_IN_DT)]); 372 mtx_unlock(&sc->sc_mtx); 373 sc->sc_can_poll = true; 374 return; 375 } 376 377 sc->sc_intr_handler = intr; 378 sc->sc_intr_ctx = context; 379 bcopy(usbhid_config, sc->sc_config, sizeof(usbhid_config)); 380 bzero(sc->sc_xfer, sizeof(sc->sc_xfer)); 381 382 /* Set buffer sizes to match HID report sizes */ 383 sc->sc_config[USBHID_INTR_OUT_DT].bufsize = rdesc->osize; 384 sc->sc_config[USBHID_INTR_IN_DT].bufsize = rdesc->isize; 385 sc->sc_config[USBHID_CTRL_DT].bufsize = 386 MAX(rdesc->isize, MAX(rdesc->osize, rdesc->fsize)); 387 388 for (n = 0; n != USBHID_N_TRANSFER; n++) { 389 if (nowrite && n == USBHID_INTR_OUT_DT) 390 continue; 391 error = usbd_transfer_setup(sc->sc_udev, &sc->sc_iface_index, 392 sc->sc_xfer + n, sc->sc_config + n, 1, 393 (void *)(sc->sc_xfer_ctx + n), &sc->sc_mtx); 394 if (error) 395 DPRINTF("xfer %d setup error=%s\n", n, 396 usbd_errstr(error)); 397 } 398 399 rdesc->rdsize = usbhid_xfer_max_len(sc->sc_xfer[USBHID_INTR_IN_DT]); 400 rdesc->grsize = usbhid_xfer_max_len(sc->sc_xfer[USBHID_CTRL_DT]); 401 rdesc->srsize = rdesc->grsize; 402 rdesc->wrsize = nowrite ? rdesc->srsize : 403 usbhid_xfer_max_len(sc->sc_xfer[USBHID_INTR_OUT_DT]); 404 405 sc->sc_intr_buf = malloc(rdesc->rdsize, M_USBDEV, M_ZERO | M_WAITOK); 406 } 407 408 static void 409 usbhid_intr_unsetup(device_t dev) 410 { 411 struct usbhid_softc* sc = device_get_softc(dev); 412 413 usbd_transfer_unsetup(sc->sc_xfer, USBHID_N_TRANSFER); 414 if (sc->sc_can_poll) 415 usbd_transfer_unsetup( 416 sc->sc_xfer, POLL_XFER(USBHID_N_TRANSFER)); 417 sc->sc_can_poll = false; 418 free(sc->sc_intr_buf, M_USBDEV); 419 } 420 421 static int 422 usbhid_intr_start(device_t dev) 423 { 424 struct usbhid_softc* sc = device_get_softc(dev); 425 426 if (sc->sc_xfer[USBHID_INTR_IN_DT] == NULL) 427 return (ENODEV); 428 429 mtx_lock(&sc->sc_mtx); 430 sc->sc_xfer_ctx[USBHID_INTR_IN_DT] = (struct usbhid_xfer_ctx) { 431 .req.intr.maxlen = 432 usbd_xfer_max_len(sc->sc_xfer[USBHID_INTR_IN_DT]), 433 .cb = usbhid_intr_handler_cb, 434 .cb_ctx = sc, 435 .buf = sc->sc_intr_buf, 436 }; 437 sc->sc_xfer_ctx[POLL_XFER(USBHID_INTR_IN_DT)] = (struct usbhid_xfer_ctx) { 438 .req.intr.maxlen = 439 usbd_xfer_max_len(sc->sc_xfer[USBHID_INTR_IN_DT]), 440 .cb = usbhid_intr_handler_cb, 441 .cb_ctx = sc, 442 .buf = sc->sc_intr_buf, 443 }; 444 usbd_transfer_start(sc->sc_xfer[USBHID_INTR_IN_DT]); 445 if (sc->sc_can_poll) 446 usbd_transfer_start(sc->sc_xfer[POLL_XFER(USBHID_INTR_IN_DT)]); 447 mtx_unlock(&sc->sc_mtx); 448 449 return (0); 450 } 451 452 static int 453 usbhid_intr_stop(device_t dev) 454 { 455 struct usbhid_softc* sc = device_get_softc(dev); 456 457 usbd_transfer_drain(sc->sc_xfer[USBHID_INTR_IN_DT]); 458 usbd_transfer_drain(sc->sc_xfer[USBHID_INTR_OUT_DT]); 459 if (sc->sc_can_poll) 460 usbd_transfer_drain(sc->sc_xfer[POLL_XFER(USBHID_INTR_IN_DT)]); 461 462 return (0); 463 } 464 465 static void 466 usbhid_intr_poll(device_t dev) 467 { 468 struct usbhid_softc* sc = device_get_softc(dev); 469 470 MPASS(sc->sc_can_poll); 471 usbd_transfer_poll(sc->sc_xfer + USBHID_INTR_IN_DT, 1); 472 usbd_transfer_poll(sc->sc_xfer + POLL_XFER(USBHID_INTR_IN_DT), 1); 473 } 474 475 /* 476 * HID interface 477 */ 478 static int 479 usbhid_sync_xfer(struct usbhid_softc* sc, int xfer_idx, 480 union usbhid_device_request *req, void *buf) 481 { 482 int error, timeout; 483 struct usbhid_xfer_ctx *xfer_ctx; 484 485 xfer_ctx = sc->sc_xfer_ctx + xfer_idx; 486 487 if (USB_IN_POLLING_MODE_FUNC()) { 488 xfer_ctx = POLL_XFER(xfer_ctx); 489 xfer_idx = POLL_XFER(xfer_idx); 490 } else { 491 mtx_lock(&sc->sc_mtx); 492 ++xfer_ctx->waiters; 493 while (xfer_ctx->influx) 494 mtx_sleep(&xfer_ctx->waiters, &sc->sc_mtx, 0, 495 "usbhid wt", 0); 496 --xfer_ctx->waiters; 497 xfer_ctx->influx = true; 498 } 499 500 xfer_ctx->buf = buf; 501 xfer_ctx->req = *req; 502 xfer_ctx->error = ETIMEDOUT; 503 xfer_ctx->cb = &usbhid_sync_wakeup_cb; 504 xfer_ctx->cb_ctx = xfer_ctx; 505 timeout = USB_DEFAULT_TIMEOUT; 506 usbd_transfer_start(sc->sc_xfer[xfer_idx]); 507 508 if (USB_IN_POLLING_MODE_FUNC()) 509 while (timeout > 0 && xfer_ctx->error == ETIMEDOUT) { 510 usbd_transfer_poll(sc->sc_xfer + xfer_idx, 1); 511 DELAY(1000); 512 timeout--; 513 } 514 else 515 msleep_sbt(xfer_ctx, &sc->sc_mtx, 0, "usbhid io", 516 SBT_1MS * timeout, 0, C_HARDCLOCK); 517 518 /* Perform usbhid_write() asyncronously to improve pipelining */ 519 if (USB_IN_POLLING_MODE_FUNC() || xfer_ctx->error != 0 || 520 sc->sc_config[xfer_idx].type != UE_INTERRUPT || 521 sc->sc_config[xfer_idx].direction != UE_DIR_OUT) 522 usbd_transfer_stop(sc->sc_xfer[xfer_idx]); 523 error = xfer_ctx->error; 524 if (error == 0) 525 *req = xfer_ctx->req; 526 527 if (!USB_IN_POLLING_MODE_FUNC()) { 528 xfer_ctx->influx = false; 529 if (xfer_ctx->waiters != 0) 530 wakeup_one(&xfer_ctx->waiters); 531 mtx_unlock(&sc->sc_mtx); 532 } 533 534 if (error) 535 DPRINTF("USB IO error:%d\n", error); 536 537 return (error); 538 } 539 540 static int 541 usbhid_get_rdesc(device_t dev, void *buf, hid_size_t len) 542 { 543 struct usbhid_softc* sc = device_get_softc(dev); 544 int error; 545 546 error = usbd_req_get_report_descriptor(sc->sc_udev, NULL, 547 buf, len, sc->sc_iface_index); 548 549 if (error) 550 DPRINTF("no report descriptor: %s\n", usbd_errstr(error)); 551 552 return (error == 0 ? 0 : ENXIO); 553 } 554 555 static int 556 usbhid_get_report(device_t dev, void *buf, hid_size_t maxlen, 557 hid_size_t *actlen, uint8_t type, uint8_t id) 558 { 559 struct usbhid_softc* sc = device_get_softc(dev); 560 union usbhid_device_request req; 561 int error; 562 563 error = usbhid_xfer_check_len(sc, USBHID_CTRL_DT, maxlen); 564 if (error) 565 return (error); 566 567 req.ctrl.bmRequestType = UT_READ_CLASS_INTERFACE; 568 req.ctrl.bRequest = UR_GET_REPORT; 569 USETW2(req.ctrl.wValue, type, id); 570 req.ctrl.wIndex[0] = sc->sc_iface_no; 571 req.ctrl.wIndex[1] = 0; 572 USETW(req.ctrl.wLength, maxlen); 573 574 error = usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, buf); 575 if (!error && actlen != NULL) 576 *actlen = maxlen; 577 578 return (error); 579 } 580 581 static int 582 usbhid_set_report(device_t dev, const void *buf, hid_size_t len, uint8_t type, 583 uint8_t id) 584 { 585 struct usbhid_softc* sc = device_get_softc(dev); 586 union usbhid_device_request req; 587 int error; 588 589 error = usbhid_xfer_check_len(sc, USBHID_CTRL_DT, len); 590 if (error) 591 return (error); 592 593 req.ctrl.bmRequestType = UT_WRITE_CLASS_INTERFACE; 594 req.ctrl.bRequest = UR_SET_REPORT; 595 USETW2(req.ctrl.wValue, type, id); 596 req.ctrl.wIndex[0] = sc->sc_iface_no; 597 req.ctrl.wIndex[1] = 0; 598 USETW(req.ctrl.wLength, len); 599 600 return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, 601 __DECONST(void *, buf))); 602 } 603 604 static int 605 usbhid_read(device_t dev, void *buf, hid_size_t maxlen, hid_size_t *actlen) 606 { 607 struct usbhid_softc* sc = device_get_softc(dev); 608 union usbhid_device_request req; 609 int error; 610 611 error = usbhid_xfer_check_len(sc, USBHID_INTR_IN_DT, maxlen); 612 if (error) 613 return (error); 614 615 req.intr.maxlen = maxlen; 616 error = usbhid_sync_xfer(sc, USBHID_INTR_IN_DT, &req, buf); 617 if (error == 0 && actlen != NULL) 618 *actlen = req.intr.actlen; 619 620 return (error); 621 } 622 623 static int 624 usbhid_write(device_t dev, const void *buf, hid_size_t len) 625 { 626 struct usbhid_softc* sc = device_get_softc(dev); 627 union usbhid_device_request req; 628 int error; 629 630 error = usbhid_xfer_check_len(sc, USBHID_INTR_OUT_DT, len); 631 if (error) 632 return (error); 633 634 req.intr.maxlen = len; 635 return (usbhid_sync_xfer(sc, USBHID_INTR_OUT_DT, &req, 636 __DECONST(void *, buf))); 637 } 638 639 static int 640 usbhid_set_idle(device_t dev, uint16_t duration, uint8_t id) 641 { 642 struct usbhid_softc* sc = device_get_softc(dev); 643 union usbhid_device_request req; 644 int error; 645 646 error = usbhid_xfer_check_len(sc, USBHID_CTRL_DT, 0); 647 if (error) 648 return (error); 649 650 /* Duration is measured in 4 milliseconds per unit. */ 651 req.ctrl.bmRequestType = UT_WRITE_CLASS_INTERFACE; 652 req.ctrl.bRequest = UR_SET_IDLE; 653 USETW2(req.ctrl.wValue, (duration + 3) / 4, id); 654 req.ctrl.wIndex[0] = sc->sc_iface_no; 655 req.ctrl.wIndex[1] = 0; 656 USETW(req.ctrl.wLength, 0); 657 658 return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, NULL)); 659 } 660 661 static int 662 usbhid_set_protocol(device_t dev, uint16_t protocol) 663 { 664 struct usbhid_softc* sc = device_get_softc(dev); 665 union usbhid_device_request req; 666 int error; 667 668 error = usbhid_xfer_check_len(sc, USBHID_CTRL_DT, 0); 669 if (error) 670 return (error); 671 672 req.ctrl.bmRequestType = UT_WRITE_CLASS_INTERFACE; 673 req.ctrl.bRequest = UR_SET_PROTOCOL; 674 USETW(req.ctrl.wValue, protocol); 675 req.ctrl.wIndex[0] = sc->sc_iface_no; 676 req.ctrl.wIndex[1] = 0; 677 USETW(req.ctrl.wLength, 0); 678 679 return (usbhid_sync_xfer(sc, USBHID_CTRL_DT, &req, NULL)); 680 } 681 682 static int 683 usbhid_ioctl(device_t dev, unsigned long cmd, uintptr_t data) 684 { 685 struct usbhid_softc* sc = device_get_softc(dev); 686 struct usb_ctl_request *ucr; 687 union usbhid_device_request req; 688 int error; 689 690 switch (cmd) { 691 case USB_REQUEST: 692 ucr = (struct usb_ctl_request *)data; 693 req.ctrl = ucr->ucr_request; 694 error = usbhid_xfer_check_len( 695 sc, USBHID_CTRL_DT, UGETW(req.ctrl.wLength)); 696 if (error) 697 break; 698 error = usb_check_request(sc->sc_udev, &req.ctrl); 699 if (error) 700 break; 701 error = usbhid_sync_xfer( 702 sc, USBHID_CTRL_DT, &req, ucr->ucr_data); 703 if (error == 0) 704 ucr->ucr_actlen = UGETW(req.ctrl.wLength); 705 break; 706 default: 707 error = EINVAL; 708 } 709 710 return (error); 711 } 712 713 static void 714 usbhid_init_device_info(struct usb_attach_arg *uaa, struct hid_device_info *hw) 715 { 716 717 hw->idBus = BUS_USB; 718 hw->idVendor = uaa->info.idVendor; 719 hw->idProduct = uaa->info.idProduct; 720 hw->idVersion = uaa->info.bcdDevice; 721 722 /* Set various quirks based on usb_attach_arg */ 723 hid_add_dynamic_quirk(hw, USB_GET_DRIVER_INFO(uaa)); 724 } 725 726 static void 727 usbhid_fill_device_info(struct usb_attach_arg *uaa, struct hid_device_info *hw) 728 { 729 struct usb_device *udev = uaa->device; 730 struct usb_interface *iface = uaa->iface; 731 struct usb_hid_descriptor *hid; 732 struct usb_endpoint *ep; 733 734 snprintf(hw->name, sizeof(hw->name), "%s %s", 735 usb_get_manufacturer(udev), usb_get_product(udev)); 736 strlcpy(hw->serial, usb_get_serial(udev), sizeof(hw->serial)); 737 738 if (uaa->info.bInterfaceClass == UICLASS_HID && 739 iface != NULL && iface->idesc != NULL) { 740 hid = hid_get_descriptor_from_usb( 741 usbd_get_config_descriptor(udev), iface->idesc); 742 if (hid != NULL) 743 hw->rdescsize = 744 UGETW(hid->descrs[0].wDescriptorLength); 745 } 746 747 /* See if there is a interrupt out endpoint. */ 748 ep = usbd_get_endpoint(udev, uaa->info.bIfaceIndex, 749 usbhid_config + USBHID_INTR_OUT_DT); 750 if (ep == NULL || ep->methods == NULL) 751 hid_add_dynamic_quirk(hw, HQ_NOWRITE); 752 } 753 754 static const STRUCT_USB_HOST_ID usbhid_devs[] = { 755 /* the Xbox 360 gamepad doesn't use the HID class */ 756 {USB_IFACE_CLASS(UICLASS_VENDOR), 757 USB_IFACE_SUBCLASS(UISUBCLASS_XBOX360_CONTROLLER), 758 USB_IFACE_PROTOCOL(UIPROTO_XBOX360_GAMEPAD), 759 USB_DRIVER_INFO(HQ_IS_XBOX360GP)}, 760 /* HID keyboard with boot protocol support */ 761 {USB_IFACE_CLASS(UICLASS_HID), 762 USB_IFACE_SUBCLASS(UISUBCLASS_BOOT), 763 USB_IFACE_PROTOCOL(UIPROTO_BOOT_KEYBOARD), 764 USB_DRIVER_INFO(HQ_HAS_KBD_BOOTPROTO)}, 765 /* HID mouse with boot protocol support */ 766 {USB_IFACE_CLASS(UICLASS_HID), 767 USB_IFACE_SUBCLASS(UISUBCLASS_BOOT), 768 USB_IFACE_PROTOCOL(UIPROTO_MOUSE), 769 USB_DRIVER_INFO(HQ_HAS_MS_BOOTPROTO)}, 770 /* generic HID class */ 771 {USB_IFACE_CLASS(UICLASS_HID), USB_DRIVER_INFO(HQ_NONE)}, 772 }; 773 774 static int 775 usbhid_probe(device_t dev) 776 { 777 struct usb_attach_arg *uaa = device_get_ivars(dev); 778 struct usbhid_softc *sc = device_get_softc(dev); 779 int error; 780 781 DPRINTFN(11, "\n"); 782 783 if (usbhid_enable == 0) 784 return (ENXIO); 785 786 if (uaa->usb_mode != USB_MODE_HOST) 787 return (ENXIO); 788 789 error = usbd_lookup_id_by_uaa(usbhid_devs, sizeof(usbhid_devs), uaa); 790 if (error) 791 return (error); 792 793 if (usb_test_quirk(uaa, UQ_HID_IGNORE)) 794 return (ENXIO); 795 796 /* 797 * Setup temporary hid_device_info so that we can figure out some 798 * basic quirks for this device. 799 */ 800 usbhid_init_device_info(uaa, &sc->sc_hw); 801 802 if (hid_test_quirk(&sc->sc_hw, HQ_HID_IGNORE)) 803 return (ENXIO); 804 805 return (BUS_PROBE_DEFAULT + 1); 806 } 807 808 static int 809 usbhid_attach(device_t dev) 810 { 811 struct usb_attach_arg *uaa = device_get_ivars(dev); 812 struct usbhid_softc *sc = device_get_softc(dev); 813 device_t child; 814 int error = 0; 815 816 DPRINTFN(10, "sc=%p\n", sc); 817 818 device_set_usb_desc(dev); 819 820 sc->sc_udev = uaa->device; 821 sc->sc_iface_no = uaa->info.bIfaceNum; 822 sc->sc_iface_index = uaa->info.bIfaceIndex; 823 824 usbhid_fill_device_info(uaa, &sc->sc_hw); 825 826 error = usbd_req_set_idle(uaa->device, NULL, 827 uaa->info.bIfaceIndex, 0, 0); 828 if (error) 829 DPRINTF("set idle failed, error=%s (ignored)\n", 830 usbd_errstr(error)); 831 832 mtx_init(&sc->sc_mtx, "usbhid lock", NULL, MTX_DEF); 833 834 child = device_add_child(dev, "hidbus", -1); 835 if (child == NULL) { 836 device_printf(dev, "Could not add hidbus device\n"); 837 usbhid_detach(dev); 838 return (ENOMEM); 839 } 840 841 device_set_ivars(child, &sc->sc_hw); 842 error = bus_generic_attach(dev); 843 if (error) { 844 device_printf(dev, "failed to attach child: %d\n", error); 845 usbhid_detach(dev); 846 return (error); 847 } 848 849 return (0); /* success */ 850 } 851 852 static int 853 usbhid_detach(device_t dev) 854 { 855 struct usbhid_softc *sc = device_get_softc(dev); 856 857 device_delete_children(dev); 858 mtx_destroy(&sc->sc_mtx); 859 860 return (0); 861 } 862 863 static device_method_t usbhid_methods[] = { 864 DEVMETHOD(device_probe, usbhid_probe), 865 DEVMETHOD(device_attach, usbhid_attach), 866 DEVMETHOD(device_detach, usbhid_detach), 867 868 DEVMETHOD(hid_intr_setup, usbhid_intr_setup), 869 DEVMETHOD(hid_intr_unsetup, usbhid_intr_unsetup), 870 DEVMETHOD(hid_intr_start, usbhid_intr_start), 871 DEVMETHOD(hid_intr_stop, usbhid_intr_stop), 872 DEVMETHOD(hid_intr_poll, usbhid_intr_poll), 873 874 /* HID interface */ 875 DEVMETHOD(hid_get_rdesc, usbhid_get_rdesc), 876 DEVMETHOD(hid_read, usbhid_read), 877 DEVMETHOD(hid_write, usbhid_write), 878 DEVMETHOD(hid_get_report, usbhid_get_report), 879 DEVMETHOD(hid_set_report, usbhid_set_report), 880 DEVMETHOD(hid_set_idle, usbhid_set_idle), 881 DEVMETHOD(hid_set_protocol, usbhid_set_protocol), 882 DEVMETHOD(hid_ioctl, usbhid_ioctl), 883 884 DEVMETHOD_END 885 }; 886 887 static driver_t usbhid_driver = { 888 .name = "usbhid", 889 .methods = usbhid_methods, 890 .size = sizeof(struct usbhid_softc), 891 }; 892 893 DRIVER_MODULE(usbhid, uhub, usbhid_driver, NULL, NULL); 894 MODULE_DEPEND(usbhid, usb, 1, 1, 1); 895 MODULE_DEPEND(usbhid, hid, 1, 1, 1); 896 MODULE_DEPEND(usbhid, hidbus, 1, 1, 1); 897 MODULE_VERSION(usbhid, 1); 898 USB_PNP_HOST_INFO(usbhid_devs);
Cache object: e019181163a7b54c1a84214e3a5bad52
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