| 1 | /* $NetBSD: uhid.c,v 1.98 2016/07/07 06:55:42 msaitoh Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1998, 2004, 2008, 2012 The NetBSD Foundation, Inc. |
| 5 | * All rights reserved. |
| 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 and Matthew R. Green (mrg@eterna.com.au). |
| 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 | * HID spec: http://www.usb.org/developers/devclass_docs/HID1_11.pdf |
| 35 | */ |
| 36 | |
| 37 | #include <sys/cdefs.h> |
| 38 | __KERNEL_RCSID(0, "$NetBSD: uhid.c,v 1.98 2016/07/07 06:55:42 msaitoh Exp $" ); |
| 39 | |
| 40 | #ifdef _KERNEL_OPT |
| 41 | #include "opt_compat_netbsd.h" |
| 42 | #include "opt_usb.h" |
| 43 | #endif |
| 44 | |
| 45 | #include <sys/param.h> |
| 46 | #include <sys/systm.h> |
| 47 | #include <sys/kernel.h> |
| 48 | #include <sys/kmem.h> |
| 49 | #include <sys/signalvar.h> |
| 50 | #include <sys/device.h> |
| 51 | #include <sys/ioctl.h> |
| 52 | #include <sys/conf.h> |
| 53 | #include <sys/tty.h> |
| 54 | #include <sys/file.h> |
| 55 | #include <sys/select.h> |
| 56 | #include <sys/proc.h> |
| 57 | #include <sys/vnode.h> |
| 58 | #include <sys/poll.h> |
| 59 | #include <sys/intr.h> |
| 60 | |
| 61 | #include <dev/usb/usb.h> |
| 62 | #include <dev/usb/usbhid.h> |
| 63 | |
| 64 | #include <dev/usb/usbdevs.h> |
| 65 | #include <dev/usb/usbdi.h> |
| 66 | #include <dev/usb/usbdi_util.h> |
| 67 | #include <dev/usb/hid.h> |
| 68 | #include <dev/usb/usb_quirks.h> |
| 69 | |
| 70 | #include <dev/usb/uhidev.h> |
| 71 | |
| 72 | #ifdef UHID_DEBUG |
| 73 | #define DPRINTF(x) if (uhiddebug) printf x |
| 74 | #define DPRINTFN(n,x) if (uhiddebug>(n)) printf x |
| 75 | int uhiddebug = 0; |
| 76 | #else |
| 77 | #define DPRINTF(x) |
| 78 | #define DPRINTFN(n,x) |
| 79 | #endif |
| 80 | |
| 81 | struct uhid_softc { |
| 82 | struct uhidev sc_hdev; |
| 83 | |
| 84 | kmutex_t sc_access_lock; /* serialises syscall accesses */ |
| 85 | kmutex_t sc_lock; /* protects refcnt, others */ |
| 86 | kcondvar_t sc_cv; |
| 87 | kcondvar_t sc_detach_cv; |
| 88 | |
| 89 | int sc_isize; |
| 90 | int sc_osize; |
| 91 | int sc_fsize; |
| 92 | |
| 93 | u_char *sc_obuf; |
| 94 | |
| 95 | struct clist sc_q; /* protected by sc_lock */ |
| 96 | struct selinfo sc_rsel; |
| 97 | proc_t *sc_async; /* process that wants SIGIO */ |
| 98 | void *sc_sih; |
| 99 | u_char sc_state; /* driver state */ |
| 100 | #define UHID_ASLP 0x01 /* waiting for device data */ |
| 101 | #define UHID_IMMED 0x02 /* return read data immediately */ |
| 102 | |
| 103 | int sc_refcnt; |
| 104 | u_char sc_dying; |
| 105 | }; |
| 106 | |
| 107 | #define UHIDUNIT(dev) (minor(dev)) |
| 108 | #define UHID_CHUNK 128 /* chunk size for read */ |
| 109 | #define UHID_BSIZE 1020 /* buffer size */ |
| 110 | |
| 111 | dev_type_open(uhidopen); |
| 112 | dev_type_close(uhidclose); |
| 113 | dev_type_read(uhidread); |
| 114 | dev_type_write(uhidwrite); |
| 115 | dev_type_ioctl(uhidioctl); |
| 116 | dev_type_poll(uhidpoll); |
| 117 | dev_type_kqfilter(uhidkqfilter); |
| 118 | |
| 119 | const struct cdevsw uhid_cdevsw = { |
| 120 | .d_open = uhidopen, |
| 121 | .d_close = uhidclose, |
| 122 | .d_read = uhidread, |
| 123 | .d_write = uhidwrite, |
| 124 | .d_ioctl = uhidioctl, |
| 125 | .d_stop = nostop, |
| 126 | .d_tty = notty, |
| 127 | .d_poll = uhidpoll, |
| 128 | .d_mmap = nommap, |
| 129 | .d_kqfilter = uhidkqfilter, |
| 130 | .d_discard = nodiscard, |
| 131 | .d_flag = D_OTHER |
| 132 | }; |
| 133 | |
| 134 | Static void uhid_intr(struct uhidev *, void *, u_int); |
| 135 | Static void uhid_softintr(void *); |
| 136 | |
| 137 | Static int uhid_do_read(struct uhid_softc *, struct uio *, int); |
| 138 | Static int uhid_do_write(struct uhid_softc *, struct uio *, int); |
| 139 | Static int uhid_do_ioctl(struct uhid_softc*, u_long, void *, int, struct lwp *); |
| 140 | |
| 141 | int uhid_match(device_t, cfdata_t, void *); |
| 142 | void uhid_attach(device_t, device_t, void *); |
| 143 | int uhid_detach(device_t, int); |
| 144 | int uhid_activate(device_t, enum devact); |
| 145 | extern struct cfdriver uhid_cd; |
| 146 | CFATTACH_DECL_NEW(uhid, sizeof(struct uhid_softc), uhid_match, uhid_attach, |
| 147 | uhid_detach, uhid_activate); |
| 148 | |
| 149 | int |
| 150 | uhid_match(device_t parent, cfdata_t match, void *aux) |
| 151 | { |
| 152 | #ifdef UHID_DEBUG |
| 153 | struct uhidev_attach_arg *uha = aux; |
| 154 | #endif |
| 155 | |
| 156 | DPRINTF(("uhid_match: report=%d\n" , uha->reportid)); |
| 157 | |
| 158 | if (match->cf_flags & 1) |
| 159 | return UMATCH_HIGHEST; |
| 160 | else |
| 161 | return UMATCH_IFACECLASS_GENERIC; |
| 162 | } |
| 163 | |
| 164 | void |
| 165 | uhid_attach(device_t parent, device_t self, void *aux) |
| 166 | { |
| 167 | struct uhid_softc *sc = device_private(self); |
| 168 | struct uhidev_attach_arg *uha = aux; |
| 169 | int size, repid; |
| 170 | void *desc; |
| 171 | |
| 172 | sc->sc_hdev.sc_dev = self; |
| 173 | selinit(&sc->sc_rsel); |
| 174 | sc->sc_hdev.sc_intr = uhid_intr; |
| 175 | sc->sc_hdev.sc_parent = uha->parent; |
| 176 | sc->sc_hdev.sc_report_id = uha->reportid; |
| 177 | sc->sc_sih = softint_establish(SOFTINT_CLOCK, uhid_softintr, sc); |
| 178 | |
| 179 | uhidev_get_report_desc(uha->parent, &desc, &size); |
| 180 | repid = uha->reportid; |
| 181 | sc->sc_isize = hid_report_size(desc, size, hid_input, repid); |
| 182 | sc->sc_osize = hid_report_size(desc, size, hid_output, repid); |
| 183 | sc->sc_fsize = hid_report_size(desc, size, hid_feature, repid); |
| 184 | |
| 185 | aprint_naive("\n" ); |
| 186 | aprint_normal(": input=%d, output=%d, feature=%d\n" , |
| 187 | sc->sc_isize, sc->sc_osize, sc->sc_fsize); |
| 188 | |
| 189 | mutex_init(&sc->sc_access_lock, MUTEX_DEFAULT, IPL_NONE); |
| 190 | mutex_init(&sc->sc_lock, MUTEX_DEFAULT, IPL_SOFTUSB); |
| 191 | cv_init(&sc->sc_cv, "uhidrea" ); |
| 192 | cv_init(&sc->sc_detach_cv, "uhiddet" ); |
| 193 | |
| 194 | if (!pmf_device_register(self, NULL, NULL)) |
| 195 | aprint_error_dev(self, "couldn't establish power handler\n" ); |
| 196 | |
| 197 | return; |
| 198 | } |
| 199 | |
| 200 | int |
| 201 | uhid_activate(device_t self, enum devact act) |
| 202 | { |
| 203 | struct uhid_softc *sc = device_private(self); |
| 204 | |
| 205 | switch (act) { |
| 206 | case DVACT_DEACTIVATE: |
| 207 | sc->sc_dying = 1; |
| 208 | return 0; |
| 209 | default: |
| 210 | return EOPNOTSUPP; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | int |
| 215 | uhid_detach(device_t self, int flags) |
| 216 | { |
| 217 | struct uhid_softc *sc = device_private(self); |
| 218 | int maj, mn; |
| 219 | |
| 220 | DPRINTF(("uhid_detach: sc=%p flags=%d\n" , sc, flags)); |
| 221 | |
| 222 | sc->sc_dying = 1; |
| 223 | |
| 224 | pmf_device_deregister(self); |
| 225 | |
| 226 | mutex_enter(&sc->sc_lock); |
| 227 | if (sc->sc_hdev.sc_state & UHIDEV_OPEN) { |
| 228 | if (--sc->sc_refcnt >= 0) { |
| 229 | /* Wake everyone */ |
| 230 | cv_broadcast(&sc->sc_cv); |
| 231 | /* Wait for processes to go away. */ |
| 232 | usb_detach_wait(sc->sc_hdev.sc_dev, |
| 233 | &sc->sc_detach_cv, &sc->sc_lock); |
| 234 | } |
| 235 | } |
| 236 | mutex_exit(&sc->sc_lock); |
| 237 | |
| 238 | /* locate the major number */ |
| 239 | maj = cdevsw_lookup_major(&uhid_cdevsw); |
| 240 | |
| 241 | /* Nuke the vnodes for any open instances (calls close). */ |
| 242 | mn = device_unit(self); |
| 243 | vdevgone(maj, mn, mn, VCHR); |
| 244 | |
| 245 | #if 0 |
| 246 | usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, |
| 247 | sc->sc_hdev.sc_parent->sc_udev, sc->sc_hdev.sc_dev); |
| 248 | #endif |
| 249 | cv_destroy(&sc->sc_cv); |
| 250 | cv_destroy(&sc->sc_detach_cv); |
| 251 | mutex_destroy(&sc->sc_lock); |
| 252 | mutex_destroy(&sc->sc_access_lock); |
| 253 | seldestroy(&sc->sc_rsel); |
| 254 | softint_disestablish(sc->sc_sih); |
| 255 | |
| 256 | return 0; |
| 257 | } |
| 258 | |
| 259 | void |
| 260 | uhid_intr(struct uhidev *addr, void *data, u_int len) |
| 261 | { |
| 262 | struct uhid_softc *sc = (struct uhid_softc *)addr; |
| 263 | |
| 264 | #ifdef UHID_DEBUG |
| 265 | if (uhiddebug > 5) { |
| 266 | uint32_t i; |
| 267 | |
| 268 | DPRINTF(("uhid_intr: data =" )); |
| 269 | for (i = 0; i < len; i++) |
| 270 | DPRINTF((" %02x" , ((u_char *)data)[i])); |
| 271 | DPRINTF(("\n" )); |
| 272 | } |
| 273 | #endif |
| 274 | |
| 275 | mutex_enter(&sc->sc_lock); |
| 276 | (void)b_to_q(data, len, &sc->sc_q); |
| 277 | |
| 278 | if (sc->sc_state & UHID_ASLP) { |
| 279 | sc->sc_state &= ~UHID_ASLP; |
| 280 | DPRINTFN(5, ("uhid_intr: waking %p\n" , &sc->sc_q)); |
| 281 | cv_broadcast(&sc->sc_cv); |
| 282 | } |
| 283 | selnotify(&sc->sc_rsel, 0, 0); |
| 284 | if (sc->sc_async != NULL) { |
| 285 | DPRINTFN(3, ("uhid_intr: sending SIGIO %p\n" , sc->sc_async)); |
| 286 | softint_schedule(sc->sc_sih); |
| 287 | } |
| 288 | mutex_exit(&sc->sc_lock); |
| 289 | } |
| 290 | |
| 291 | void |
| 292 | uhid_softintr(void *cookie) |
| 293 | { |
| 294 | struct uhid_softc *sc; |
| 295 | |
| 296 | sc = cookie; |
| 297 | |
| 298 | mutex_enter(proc_lock); |
| 299 | if (sc->sc_async != NULL) |
| 300 | psignal(sc->sc_async, SIGIO); |
| 301 | mutex_exit(proc_lock); |
| 302 | } |
| 303 | |
| 304 | int |
| 305 | uhidopen(dev_t dev, int flag, int mode, struct lwp *l) |
| 306 | { |
| 307 | struct uhid_softc *sc; |
| 308 | int error; |
| 309 | |
| 310 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 311 | if (sc == NULL) |
| 312 | return ENXIO; |
| 313 | |
| 314 | DPRINTF(("uhidopen: sc=%p\n" , sc)); |
| 315 | |
| 316 | if (sc->sc_dying) |
| 317 | return ENXIO; |
| 318 | |
| 319 | mutex_enter(&sc->sc_access_lock); |
| 320 | |
| 321 | /* |
| 322 | * uhid interrupts aren't enabled yet, so setup sc_q now, as |
| 323 | * long as they're not already allocated. |
| 324 | */ |
| 325 | if (sc->sc_hdev.sc_state & UHIDEV_OPEN) { |
| 326 | mutex_exit(&sc->sc_access_lock); |
| 327 | return EBUSY; |
| 328 | } |
| 329 | if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) { |
| 330 | mutex_exit(&sc->sc_access_lock); |
| 331 | return ENOMEM; |
| 332 | } |
| 333 | |
| 334 | error = uhidev_open(&sc->sc_hdev); |
| 335 | if (error) { |
| 336 | clfree(&sc->sc_q); |
| 337 | mutex_exit(&sc->sc_access_lock); |
| 338 | return error; |
| 339 | } |
| 340 | mutex_exit(&sc->sc_access_lock); |
| 341 | |
| 342 | if (sc->sc_osize > 0) |
| 343 | sc->sc_obuf = kmem_alloc(sc->sc_osize, KM_SLEEP); |
| 344 | else |
| 345 | sc->sc_obuf = NULL; |
| 346 | sc->sc_state &= ~UHID_IMMED; |
| 347 | |
| 348 | mutex_enter(proc_lock); |
| 349 | sc->sc_async = NULL; |
| 350 | mutex_exit(proc_lock); |
| 351 | |
| 352 | return 0; |
| 353 | } |
| 354 | |
| 355 | int |
| 356 | uhidclose(dev_t dev, int flag, int mode, struct lwp *l) |
| 357 | { |
| 358 | struct uhid_softc *sc; |
| 359 | |
| 360 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 361 | |
| 362 | DPRINTF(("uhidclose: sc=%p\n" , sc)); |
| 363 | |
| 364 | mutex_enter(proc_lock); |
| 365 | sc->sc_async = NULL; |
| 366 | mutex_exit(proc_lock); |
| 367 | |
| 368 | mutex_enter(&sc->sc_access_lock); |
| 369 | |
| 370 | uhidev_stop(&sc->sc_hdev); |
| 371 | |
| 372 | clfree(&sc->sc_q); |
| 373 | if (sc->sc_osize > 0) |
| 374 | kmem_free(sc->sc_obuf, sc->sc_osize); |
| 375 | |
| 376 | uhidev_close(&sc->sc_hdev); |
| 377 | |
| 378 | mutex_exit(&sc->sc_access_lock); |
| 379 | |
| 380 | return 0; |
| 381 | } |
| 382 | |
| 383 | int |
| 384 | uhid_do_read(struct uhid_softc *sc, struct uio *uio, int flag) |
| 385 | { |
| 386 | int error = 0; |
| 387 | int ; |
| 388 | size_t length; |
| 389 | u_char buffer[UHID_CHUNK]; |
| 390 | usbd_status err; |
| 391 | |
| 392 | DPRINTFN(1, ("uhidread\n" )); |
| 393 | if (sc->sc_state & UHID_IMMED) { |
| 394 | DPRINTFN(1, ("uhidread immed\n" )); |
| 395 | extra = sc->sc_hdev.sc_report_id != 0; |
| 396 | err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, |
| 397 | buffer, sc->sc_isize + extra); |
| 398 | if (err) |
| 399 | return EIO; |
| 400 | return uiomove(buffer+extra, sc->sc_isize, uio); |
| 401 | } |
| 402 | |
| 403 | mutex_enter(&sc->sc_lock); |
| 404 | while (sc->sc_q.c_cc == 0) { |
| 405 | if (flag & IO_NDELAY) { |
| 406 | mutex_exit(&sc->sc_lock); |
| 407 | return EWOULDBLOCK; |
| 408 | } |
| 409 | sc->sc_state |= UHID_ASLP; |
| 410 | DPRINTFN(5, ("uhidread: sleep on %p\n" , &sc->sc_q)); |
| 411 | error = cv_wait_sig(&sc->sc_cv, &sc->sc_lock); |
| 412 | DPRINTFN(5, ("uhidread: woke, error=%d\n" , error)); |
| 413 | if (sc->sc_dying) |
| 414 | error = EIO; |
| 415 | if (error) { |
| 416 | sc->sc_state &= ~UHID_ASLP; |
| 417 | break; |
| 418 | } |
| 419 | } |
| 420 | |
| 421 | /* Transfer as many chunks as possible. */ |
| 422 | while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0 && !error) { |
| 423 | length = min(sc->sc_q.c_cc, uio->uio_resid); |
| 424 | if (length > sizeof(buffer)) |
| 425 | length = sizeof(buffer); |
| 426 | |
| 427 | /* Remove a small chunk from the input queue. */ |
| 428 | (void) q_to_b(&sc->sc_q, buffer, length); |
| 429 | DPRINTFN(5, ("uhidread: got %lu chars\n" , (u_long)length)); |
| 430 | |
| 431 | /* Copy the data to the user process. */ |
| 432 | mutex_exit(&sc->sc_lock); |
| 433 | if ((error = uiomove(buffer, length, uio)) != 0) |
| 434 | return error; |
| 435 | mutex_enter(&sc->sc_lock); |
| 436 | } |
| 437 | |
| 438 | mutex_exit(&sc->sc_lock); |
| 439 | return error; |
| 440 | } |
| 441 | |
| 442 | int |
| 443 | uhidread(dev_t dev, struct uio *uio, int flag) |
| 444 | { |
| 445 | struct uhid_softc *sc; |
| 446 | int error; |
| 447 | |
| 448 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 449 | |
| 450 | mutex_enter(&sc->sc_lock); |
| 451 | sc->sc_refcnt++; |
| 452 | mutex_exit(&sc->sc_lock); |
| 453 | |
| 454 | mutex_enter(&sc->sc_access_lock); |
| 455 | error = uhid_do_read(sc, uio, flag); |
| 456 | mutex_exit(&sc->sc_access_lock); |
| 457 | |
| 458 | mutex_enter(&sc->sc_lock); |
| 459 | if (--sc->sc_refcnt < 0) |
| 460 | usb_detach_broadcast(sc->sc_hdev.sc_dev, &sc->sc_detach_cv); |
| 461 | mutex_exit(&sc->sc_lock); |
| 462 | return error; |
| 463 | } |
| 464 | |
| 465 | int |
| 466 | uhid_do_write(struct uhid_softc *sc, struct uio *uio, int flag) |
| 467 | { |
| 468 | int error; |
| 469 | int size; |
| 470 | usbd_status err; |
| 471 | |
| 472 | DPRINTFN(1, ("uhidwrite\n" )); |
| 473 | |
| 474 | if (sc->sc_dying) |
| 475 | return EIO; |
| 476 | |
| 477 | size = sc->sc_osize; |
| 478 | error = 0; |
| 479 | if (uio->uio_resid != size || size == 0) |
| 480 | return EINVAL; |
| 481 | error = uiomove(sc->sc_obuf, size, uio); |
| 482 | if (!error) { |
| 483 | err = uhidev_set_report(&sc->sc_hdev, UHID_OUTPUT_REPORT, |
| 484 | sc->sc_obuf, size); |
| 485 | if (err) |
| 486 | error = EIO; |
| 487 | } |
| 488 | |
| 489 | return error; |
| 490 | } |
| 491 | |
| 492 | int |
| 493 | uhidwrite(dev_t dev, struct uio *uio, int flag) |
| 494 | { |
| 495 | struct uhid_softc *sc; |
| 496 | int error; |
| 497 | |
| 498 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 499 | |
| 500 | mutex_enter(&sc->sc_lock); |
| 501 | sc->sc_refcnt++; |
| 502 | mutex_exit(&sc->sc_lock); |
| 503 | |
| 504 | mutex_enter(&sc->sc_access_lock); |
| 505 | error = uhid_do_write(sc, uio, flag); |
| 506 | mutex_exit(&sc->sc_access_lock); |
| 507 | |
| 508 | mutex_enter(&sc->sc_lock); |
| 509 | if (--sc->sc_refcnt < 0) |
| 510 | usb_detach_broadcast(sc->sc_hdev.sc_dev, &sc->sc_detach_cv); |
| 511 | mutex_exit(&sc->sc_lock); |
| 512 | return error; |
| 513 | } |
| 514 | |
| 515 | int |
| 516 | uhid_do_ioctl(struct uhid_softc *sc, u_long cmd, void *addr, |
| 517 | int flag, struct lwp *l) |
| 518 | { |
| 519 | struct usb_ctl_report_desc *rd; |
| 520 | struct usb_ctl_report *re; |
| 521 | u_char buffer[UHID_CHUNK]; |
| 522 | int size, ; |
| 523 | usbd_status err; |
| 524 | void *desc; |
| 525 | |
| 526 | DPRINTFN(2, ("uhidioctl: cmd=%lx\n" , cmd)); |
| 527 | |
| 528 | if (sc->sc_dying) |
| 529 | return EIO; |
| 530 | |
| 531 | switch (cmd) { |
| 532 | case FIONBIO: |
| 533 | /* All handled in the upper FS layer. */ |
| 534 | break; |
| 535 | |
| 536 | case FIOASYNC: |
| 537 | mutex_enter(proc_lock); |
| 538 | if (*(int *)addr) { |
| 539 | if (sc->sc_async != NULL) |
| 540 | return EBUSY; |
| 541 | sc->sc_async = l->l_proc; |
| 542 | DPRINTF(("uhid_do_ioctl: FIOASYNC %p\n" , l->l_proc)); |
| 543 | } else |
| 544 | sc->sc_async = NULL; |
| 545 | mutex_exit(proc_lock); |
| 546 | break; |
| 547 | |
| 548 | /* XXX this is not the most general solution. */ |
| 549 | case TIOCSPGRP: |
| 550 | mutex_enter(proc_lock); |
| 551 | if (sc->sc_async == NULL) { |
| 552 | mutex_exit(proc_lock); |
| 553 | return EINVAL; |
| 554 | } |
| 555 | if (*(int *)addr != sc->sc_async->p_pgid) { |
| 556 | mutex_exit(proc_lock); |
| 557 | return EPERM; |
| 558 | } |
| 559 | mutex_exit(proc_lock); |
| 560 | break; |
| 561 | |
| 562 | case FIOSETOWN: |
| 563 | mutex_enter(proc_lock); |
| 564 | if (sc->sc_async == NULL) { |
| 565 | mutex_exit(proc_lock); |
| 566 | return EINVAL; |
| 567 | } |
| 568 | if (-*(int *)addr != sc->sc_async->p_pgid |
| 569 | && *(int *)addr != sc->sc_async->p_pid) { |
| 570 | mutex_exit(proc_lock); |
| 571 | return EPERM; |
| 572 | } |
| 573 | mutex_exit(proc_lock); |
| 574 | break; |
| 575 | |
| 576 | case USB_GET_REPORT_DESC: |
| 577 | uhidev_get_report_desc(sc->sc_hdev.sc_parent, &desc, &size); |
| 578 | rd = (struct usb_ctl_report_desc *)addr; |
| 579 | size = min(size, sizeof(rd->ucrd_data)); |
| 580 | rd->ucrd_size = size; |
| 581 | memcpy(rd->ucrd_data, desc, size); |
| 582 | break; |
| 583 | |
| 584 | case USB_SET_IMMED: |
| 585 | if (*(int *)addr) { |
| 586 | extra = sc->sc_hdev.sc_report_id != 0; |
| 587 | err = uhidev_get_report(&sc->sc_hdev, UHID_INPUT_REPORT, |
| 588 | buffer, sc->sc_isize + extra); |
| 589 | if (err) |
| 590 | return EOPNOTSUPP; |
| 591 | |
| 592 | sc->sc_state |= UHID_IMMED; |
| 593 | } else |
| 594 | sc->sc_state &= ~UHID_IMMED; |
| 595 | break; |
| 596 | |
| 597 | case USB_GET_REPORT: |
| 598 | re = (struct usb_ctl_report *)addr; |
| 599 | switch (re->ucr_report) { |
| 600 | case UHID_INPUT_REPORT: |
| 601 | size = sc->sc_isize; |
| 602 | break; |
| 603 | case UHID_OUTPUT_REPORT: |
| 604 | size = sc->sc_osize; |
| 605 | break; |
| 606 | case UHID_FEATURE_REPORT: |
| 607 | size = sc->sc_fsize; |
| 608 | break; |
| 609 | default: |
| 610 | return EINVAL; |
| 611 | } |
| 612 | extra = sc->sc_hdev.sc_report_id != 0; |
| 613 | err = uhidev_get_report(&sc->sc_hdev, re->ucr_report, |
| 614 | re->ucr_data, size + extra); |
| 615 | if (extra) |
| 616 | memcpy(re->ucr_data, re->ucr_data+1, size); |
| 617 | if (err) |
| 618 | return EIO; |
| 619 | break; |
| 620 | |
| 621 | case USB_SET_REPORT: |
| 622 | re = (struct usb_ctl_report *)addr; |
| 623 | switch (re->ucr_report) { |
| 624 | case UHID_INPUT_REPORT: |
| 625 | size = sc->sc_isize; |
| 626 | break; |
| 627 | case UHID_OUTPUT_REPORT: |
| 628 | size = sc->sc_osize; |
| 629 | break; |
| 630 | case UHID_FEATURE_REPORT: |
| 631 | size = sc->sc_fsize; |
| 632 | break; |
| 633 | default: |
| 634 | return EINVAL; |
| 635 | } |
| 636 | err = uhidev_set_report(&sc->sc_hdev, re->ucr_report, |
| 637 | re->ucr_data, size); |
| 638 | if (err) |
| 639 | return EIO; |
| 640 | break; |
| 641 | |
| 642 | case USB_GET_REPORT_ID: |
| 643 | *(int *)addr = sc->sc_hdev.sc_report_id; |
| 644 | break; |
| 645 | |
| 646 | case USB_GET_DEVICE_DESC: |
| 647 | *(usb_device_descriptor_t *)addr = |
| 648 | *usbd_get_device_descriptor(sc->sc_hdev.sc_parent->sc_udev); |
| 649 | break; |
| 650 | |
| 651 | case USB_GET_DEVICEINFO: |
| 652 | usbd_fill_deviceinfo(sc->sc_hdev.sc_parent->sc_udev, |
| 653 | (struct usb_device_info *)addr, 0); |
| 654 | break; |
| 655 | #ifdef COMPAT_30 |
| 656 | case USB_GET_DEVICEINFO_OLD: |
| 657 | usbd_fill_deviceinfo_old(sc->sc_hdev.sc_parent->sc_udev, |
| 658 | (struct usb_device_info_old *)addr, 0); |
| 659 | |
| 660 | break; |
| 661 | #endif |
| 662 | case USB_GET_STRING_DESC: |
| 663 | { |
| 664 | struct usb_string_desc *si = (struct usb_string_desc *)addr; |
| 665 | err = usbd_get_string_desc(sc->sc_hdev.sc_parent->sc_udev, |
| 666 | si->usd_string_index, |
| 667 | si->usd_language_id, &si->usd_desc, &size); |
| 668 | if (err) |
| 669 | return EINVAL; |
| 670 | break; |
| 671 | } |
| 672 | |
| 673 | default: |
| 674 | return EINVAL; |
| 675 | } |
| 676 | return 0; |
| 677 | } |
| 678 | |
| 679 | int |
| 680 | uhidioctl(dev_t dev, u_long cmd, void *addr, int flag, struct lwp *l) |
| 681 | { |
| 682 | struct uhid_softc *sc; |
| 683 | int error; |
| 684 | |
| 685 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 686 | if (sc == NULL) |
| 687 | return ENXIO; |
| 688 | |
| 689 | if (sc->sc_dying) |
| 690 | return EIO; |
| 691 | |
| 692 | mutex_enter(&sc->sc_lock); |
| 693 | sc->sc_refcnt++; |
| 694 | mutex_exit(&sc->sc_lock); |
| 695 | |
| 696 | mutex_enter(&sc->sc_access_lock); |
| 697 | error = uhid_do_ioctl(sc, cmd, addr, flag, l); |
| 698 | mutex_exit(&sc->sc_access_lock); |
| 699 | |
| 700 | mutex_enter(&sc->sc_lock); |
| 701 | if (--sc->sc_refcnt < 0) |
| 702 | usb_detach_broadcast(sc->sc_hdev.sc_dev, &sc->sc_detach_cv); |
| 703 | mutex_exit(&sc->sc_lock); |
| 704 | return error; |
| 705 | } |
| 706 | |
| 707 | int |
| 708 | uhidpoll(dev_t dev, int events, struct lwp *l) |
| 709 | { |
| 710 | struct uhid_softc *sc; |
| 711 | int revents = 0; |
| 712 | |
| 713 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 714 | if (sc == NULL) |
| 715 | return ENXIO; |
| 716 | |
| 717 | if (sc->sc_dying) |
| 718 | return EIO; |
| 719 | |
| 720 | mutex_enter(&sc->sc_lock); |
| 721 | if (events & (POLLOUT | POLLWRNORM)) |
| 722 | revents |= events & (POLLOUT | POLLWRNORM); |
| 723 | if (events & (POLLIN | POLLRDNORM)) { |
| 724 | if (sc->sc_q.c_cc > 0) |
| 725 | revents |= events & (POLLIN | POLLRDNORM); |
| 726 | else |
| 727 | selrecord(l, &sc->sc_rsel); |
| 728 | } |
| 729 | mutex_exit(&sc->sc_lock); |
| 730 | |
| 731 | return revents; |
| 732 | } |
| 733 | |
| 734 | static void |
| 735 | filt_uhidrdetach(struct knote *kn) |
| 736 | { |
| 737 | struct uhid_softc *sc = kn->kn_hook; |
| 738 | |
| 739 | mutex_enter(&sc->sc_lock); |
| 740 | SLIST_REMOVE(&sc->sc_rsel.sel_klist, kn, knote, kn_selnext); |
| 741 | mutex_exit(&sc->sc_lock); |
| 742 | } |
| 743 | |
| 744 | static int |
| 745 | filt_uhidread(struct knote *kn, long hint) |
| 746 | { |
| 747 | struct uhid_softc *sc = kn->kn_hook; |
| 748 | |
| 749 | kn->kn_data = sc->sc_q.c_cc; |
| 750 | return kn->kn_data > 0; |
| 751 | } |
| 752 | |
| 753 | static const struct filterops uhidread_filtops = |
| 754 | { 1, NULL, filt_uhidrdetach, filt_uhidread }; |
| 755 | |
| 756 | static const struct filterops uhid_seltrue_filtops = |
| 757 | { 1, NULL, filt_uhidrdetach, filt_seltrue }; |
| 758 | |
| 759 | int |
| 760 | uhidkqfilter(dev_t dev, struct knote *kn) |
| 761 | { |
| 762 | struct uhid_softc *sc; |
| 763 | struct klist *klist; |
| 764 | |
| 765 | sc = device_lookup_private(&uhid_cd, UHIDUNIT(dev)); |
| 766 | |
| 767 | if (sc->sc_dying) |
| 768 | return ENXIO; |
| 769 | |
| 770 | switch (kn->kn_filter) { |
| 771 | case EVFILT_READ: |
| 772 | klist = &sc->sc_rsel.sel_klist; |
| 773 | kn->kn_fop = &uhidread_filtops; |
| 774 | break; |
| 775 | |
| 776 | case EVFILT_WRITE: |
| 777 | klist = &sc->sc_rsel.sel_klist; |
| 778 | kn->kn_fop = &uhid_seltrue_filtops; |
| 779 | break; |
| 780 | |
| 781 | default: |
| 782 | return EINVAL; |
| 783 | } |
| 784 | |
| 785 | kn->kn_hook = sc; |
| 786 | |
| 787 | mutex_enter(&sc->sc_lock); |
| 788 | SLIST_INSERT_HEAD(klist, kn, kn_selnext); |
| 789 | mutex_exit(&sc->sc_lock); |
| 790 | |
| 791 | return 0; |
| 792 | } |
| 793 | |