uhid.c revision 1.16
1 /* $NetBSD: uhid.c,v 1.16 1999/04/21 19:02:26 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 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 (augustss (at) carlstedt.se) 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 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by the NetBSD 22 * Foundation, Inc. and its contributors. 23 * 4. Neither the name of The NetBSD Foundation nor the names of its 24 * contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 29 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 30 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 31 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 32 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 33 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 34 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 35 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 36 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 37 * POSSIBILITY OF SUCH DAMAGE. 38 */ 39 40 /* 41 * HID spec: http://www.usb.org/developers/data/usbhid10.pdf 42 */ 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/malloc.h> 48 #if defined(__NetBSD__) 49 #include <sys/device.h> 50 #include <sys/ioctl.h> 51 #elif defined(__FreeBSD__) 52 #include <sys/ioccom.h> 53 #include <sys/filio.h> 54 #include <sys/module.h> 55 #include <sys/bus.h> 56 #include <sys/ioccom.h> 57 #endif 58 #include <sys/tty.h> 59 #include <sys/file.h> 60 #include <sys/select.h> 61 #include <sys/proc.h> 62 #include <sys/vnode.h> 63 #include <sys/poll.h> 64 65 #include <dev/usb/usb.h> 66 #include <dev/usb/usbhid.h> 67 68 #include <dev/usb/usbdi.h> 69 #include <dev/usb/usbdi_util.h> 70 #include <dev/usb/hid.h> 71 #include <dev/usb/usb_quirks.h> 72 73 #ifdef USB_DEBUG 74 #define DPRINTF(x) if (uhiddebug) printf x 75 #define DPRINTFN(n,x) if (uhiddebug>(n)) printf x 76 int uhiddebug = 0; 77 #else 78 #define DPRINTF(x) 79 #define DPRINTFN(n,x) 80 #endif 81 82 struct uhid_softc { 83 bdevice sc_dev; /* base device */ 84 usbd_interface_handle sc_iface; /* interface */ 85 usbd_pipe_handle sc_intrpipe; /* interrupt pipe */ 86 int sc_ep_addr; 87 88 int sc_isize; 89 int sc_osize; 90 int sc_fsize; 91 u_int8_t sc_iid; 92 u_int8_t sc_oid; 93 u_int8_t sc_fid; 94 95 char *sc_ibuf; 96 char *sc_obuf; 97 98 void *sc_repdesc; 99 int sc_repdesc_size; 100 101 struct clist sc_q; 102 struct selinfo sc_rsel; 103 u_char sc_state; /* driver state */ 104 #define UHID_OPEN 0x01 /* device is open */ 105 #define UHID_ASLP 0x02 /* waiting for device data */ 106 #define UHID_NEEDCLEAR 0x04 /* needs clearing endpoint stall */ 107 #define UHID_IMMED 0x08 /* return read data immediately */ 108 int sc_disconnected; /* device is gone */ 109 }; 110 111 #define UHIDUNIT(dev) (minor(dev)) 112 #define UHID_CHUNK 128 /* chunk size for read */ 113 #define UHID_BSIZE 1020 /* buffer size */ 114 115 int uhidopen __P((dev_t, int, int, struct proc *)); 116 int uhidclose __P((dev_t, int, int, struct proc *p)); 117 int uhidread __P((dev_t, struct uio *uio, int)); 118 int uhidwrite __P((dev_t, struct uio *uio, int)); 119 int uhidioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 120 int uhidpoll __P((dev_t, int, struct proc *)); 121 void uhid_intr __P((usbd_request_handle, usbd_private_handle, usbd_status)); 122 void uhid_disco __P((void *)); 123 124 USB_DECLARE_DRIVER(uhid); 125 126 USB_MATCH(uhid) 127 { 128 USB_MATCH_START(uhid, uaa); 129 usb_interface_descriptor_t *id; 130 131 if (!uaa->iface) 132 return (UMATCH_NONE); 133 id = usbd_get_interface_descriptor(uaa->iface); 134 if (!id || id->bInterfaceClass != UCLASS_HID) 135 return (UMATCH_NONE); 136 return (UMATCH_IFACECLASS_GENERIC); 137 } 138 139 USB_ATTACH(uhid) 140 { 141 USB_ATTACH_START(uhid, sc, uaa); 142 usbd_interface_handle iface = uaa->iface; 143 usb_interface_descriptor_t *id; 144 usb_endpoint_descriptor_t *ed; 145 int size; 146 void *desc; 147 usbd_status r; 148 char devinfo[1024]; 149 150 sc->sc_disconnected = 1; 151 sc->sc_iface = iface; 152 id = usbd_get_interface_descriptor(iface); 153 usbd_devinfo(uaa->device, 0, devinfo); 154 USB_ATTACH_SETUP; 155 printf("%s: %s, iclass %d/%d\n", USBDEVNAME(sc->sc_dev), 156 devinfo, id->bInterfaceClass, id->bInterfaceSubClass); 157 158 ed = usbd_interface2endpoint_descriptor(iface, 0); 159 if (!ed) { 160 printf("%s: could not read endpoint descriptor\n", 161 USBDEVNAME(sc->sc_dev)); 162 USB_ATTACH_ERROR_RETURN; 163 } 164 165 DPRINTFN(10,("uhid_attach: bLength=%d bDescriptorType=%d " 166 "bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d" 167 " bInterval=%d\n", 168 ed->bLength, ed->bDescriptorType, 169 ed->bEndpointAddress & UE_ADDR, 170 ed->bEndpointAddress & UE_IN ? "in" : "out", 171 ed->bmAttributes & UE_XFERTYPE, 172 UGETW(ed->wMaxPacketSize), ed->bInterval)); 173 174 if ((ed->bEndpointAddress & UE_IN) != UE_IN || 175 (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 176 printf("%s: unexpected endpoint\n", USBDEVNAME(sc->sc_dev)); 177 USB_ATTACH_ERROR_RETURN; 178 } 179 180 sc->sc_ep_addr = ed->bEndpointAddress; 181 sc->sc_disconnected = 0; 182 183 r = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_USB); 184 if (r != USBD_NORMAL_COMPLETION) { 185 printf("%s: no report descriptor\n", USBDEVNAME(sc->sc_dev)); 186 USB_ATTACH_ERROR_RETURN; 187 } 188 189 (void)usbd_set_idle(iface, 0, 0); 190 191 sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid); 192 sc->sc_osize = hid_report_size(desc, size, hid_output, &sc->sc_oid); 193 sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid); 194 195 sc->sc_repdesc = desc; 196 sc->sc_repdesc_size = size; 197 198 USB_ATTACH_SUCCESS_RETURN; 199 } 200 201 #if defined(__FreeBSD__) 202 static int 203 uhid_detach(device_t self) 204 { 205 struct uhid_softc *sc = device_get_softc(self); 206 char *devinfo = (char *) device_get_desc(self); 207 208 if (devinfo) { 209 device_set_desc(self, NULL); 210 free(devinfo, M_USB); 211 } 212 return 0; 213 } 214 #endif 215 216 void 217 uhid_disco(p) 218 void *p; 219 { 220 struct uhid_softc *sc = p; 221 222 DPRINTF(("ums_hid: sc=%p\n", sc)); 223 usbd_abort_pipe(sc->sc_intrpipe); 224 sc->sc_disconnected = 1; 225 } 226 227 void 228 uhid_intr(reqh, addr, status) 229 usbd_request_handle reqh; 230 usbd_private_handle addr; 231 usbd_status status; 232 { 233 struct uhid_softc *sc = addr; 234 235 DPRINTFN(5, ("uhid_intr: status=%d\n", status)); 236 DPRINTFN(5, ("uhid_intr: data = %02x %02x %02x\n", 237 sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2])); 238 239 if (status == USBD_CANCELLED) 240 return; 241 242 if (status != USBD_NORMAL_COMPLETION) { 243 DPRINTF(("uhid_intr: status=%d\n", status)); 244 sc->sc_state |= UHID_NEEDCLEAR; 245 return; 246 } 247 248 (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q); 249 250 if (sc->sc_state & UHID_ASLP) { 251 sc->sc_state &= ~UHID_ASLP; 252 DPRINTFN(5, ("uhid_intr: waking %p\n", sc)); 253 wakeup((caddr_t)sc); 254 } 255 selwakeup(&sc->sc_rsel); 256 } 257 258 int 259 uhidopen(dev, flag, mode, p) 260 dev_t dev; 261 int flag; 262 int mode; 263 struct proc *p; 264 { 265 usbd_status r; 266 USB_GET_SC_OPEN(uhid, UHIDUNIT(dev), sc); 267 268 if (!sc) 269 return (ENXIO); 270 271 DPRINTF(("uhidopen: sc=%p, disco=%d\n", sc, sc->sc_disconnected)); 272 273 if (sc->sc_disconnected) 274 return (EIO); 275 276 if (sc->sc_state & UHID_OPEN) 277 return (EBUSY); 278 279 #if defined(__NetBSD__) 280 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) 281 return (ENOMEM); 282 #elif defined(__FreeBSD__) 283 clist_alloc_cblocks(&sc->sc_q, UHID_BSIZE, 0); 284 #endif 285 286 sc->sc_state |= UHID_OPEN; 287 sc->sc_state &= ~UHID_IMMED; 288 289 sc->sc_ibuf = malloc(sc->sc_isize, M_USB, M_WAITOK); 290 sc->sc_obuf = malloc(sc->sc_osize, M_USB, M_WAITOK); 291 292 /* Set up interrupt pipe. */ 293 r = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr, 294 USBD_SHORT_XFER_OK, 295 &sc->sc_intrpipe, sc, sc->sc_ibuf, 296 sc->sc_isize, uhid_intr); 297 if (r != USBD_NORMAL_COMPLETION) { 298 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, " 299 "error=%d\n",r)); 300 sc->sc_state &= ~UHID_OPEN; 301 return (EIO); 302 } 303 usbd_set_disco(sc->sc_intrpipe, uhid_disco, sc); 304 305 return (0); 306 } 307 308 int 309 uhidclose(dev, flag, mode, p) 310 dev_t dev; 311 int flag; 312 int mode; 313 struct proc *p; 314 { 315 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 316 317 if (sc->sc_disconnected) 318 return (EIO); 319 320 DPRINTF(("uhidclose: sc=%p\n", sc)); 321 322 /* Disable interrupts. */ 323 usbd_abort_pipe(sc->sc_intrpipe); 324 usbd_close_pipe(sc->sc_intrpipe); 325 326 sc->sc_state &= ~UHID_OPEN; 327 328 #if defined(__NetBSD__) 329 clfree(&sc->sc_q); 330 #elif defined(__FreeBSD__) 331 clist_free_cblocks(&sc->sc_q); 332 #endif 333 334 free(sc->sc_ibuf, M_USB); 335 free(sc->sc_obuf, M_USB); 336 337 return (0); 338 } 339 340 int 341 uhidread(dev, uio, flag) 342 dev_t dev; 343 struct uio *uio; 344 int flag; 345 { 346 int s; 347 int error = 0; 348 size_t length; 349 u_char buffer[UHID_CHUNK]; 350 usbd_status r; 351 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 352 353 if (sc->sc_disconnected) 354 return (EIO); 355 356 DPRINTFN(1, ("uhidread\n")); 357 if (sc->sc_state & UHID_IMMED) { 358 DPRINTFN(1, ("uhidread immed\n")); 359 360 r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT, 361 sc->sc_iid, buffer, sc->sc_isize); 362 if (r != USBD_NORMAL_COMPLETION) 363 return (EIO); 364 return (uiomove(buffer, sc->sc_isize, uio)); 365 } 366 367 s = splusb(); 368 while (sc->sc_q.c_cc == 0) { 369 if (flag & IO_NDELAY) { 370 splx(s); 371 return EWOULDBLOCK; 372 } 373 sc->sc_state |= UHID_ASLP; 374 DPRINTFN(5, ("uhidread: sleep on %p\n", sc)); 375 error = tsleep((caddr_t)sc, PZERO | PCATCH, "uhidrea", 0); 376 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 377 if (error) { 378 sc->sc_state &= ~UHID_ASLP; 379 splx(s); 380 return (error); 381 } 382 if (sc->sc_state & UHID_NEEDCLEAR) { 383 DPRINTFN(-1,("uhidread: clearing stall\n")); 384 sc->sc_state &= ~UHID_NEEDCLEAR; 385 usbd_clear_endpoint_stall(sc->sc_intrpipe); 386 } 387 } 388 splx(s); 389 390 /* Transfer as many chunks as possible. */ 391 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 392 length = min(sc->sc_q.c_cc, uio->uio_resid); 393 if (length > sizeof(buffer)) 394 length = sizeof(buffer); 395 396 /* Remove a small chunk from the input queue. */ 397 (void) q_to_b(&sc->sc_q, buffer, length); 398 DPRINTFN(5, ("uhidread: got %d chars\n", length)); 399 400 /* Copy the data to the user process. */ 401 if ((error = uiomove(buffer, length, uio)) != 0) 402 break; 403 } 404 405 return (error); 406 } 407 408 int 409 uhidwrite(dev, uio, flag) 410 dev_t dev; 411 struct uio *uio; 412 int flag; 413 { 414 int error; 415 int size; 416 usbd_status r; 417 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 418 419 if (sc->sc_disconnected) 420 return (EIO); 421 422 DPRINTFN(1, ("uhidwrite\n")); 423 424 size = sc->sc_osize; 425 error = 0; 426 while (uio->uio_resid > 0) { 427 if (uio->uio_resid != size) 428 return (0); 429 if ((error = uiomove(sc->sc_obuf, size, uio)) != 0) 430 break; 431 if (sc->sc_oid) 432 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 433 sc->sc_obuf[0], 434 sc->sc_obuf+1, size-1); 435 else 436 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 437 0, sc->sc_obuf, size); 438 if (r != USBD_NORMAL_COMPLETION) { 439 error = EIO; 440 break; 441 } 442 } 443 return (error); 444 } 445 446 int 447 uhidioctl(dev, cmd, addr, flag, p) 448 dev_t dev; 449 u_long cmd; 450 caddr_t addr; 451 int flag; 452 struct proc *p; 453 { 454 struct usb_ctl_report_desc *rd; 455 struct usb_ctl_report *re; 456 int size, id; 457 usbd_status r; 458 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 459 460 if (sc->sc_disconnected) 461 return (EIO); 462 463 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 464 switch (cmd) { 465 case FIONBIO: 466 /* All handled in the upper FS layer. */ 467 break; 468 469 case USB_GET_REPORT_DESC: 470 rd = (struct usb_ctl_report_desc *)addr; 471 size = min(sc->sc_repdesc_size, sizeof rd->data); 472 rd->size = size; 473 memcpy(rd->data, sc->sc_repdesc, size); 474 break; 475 476 case USB_SET_IMMED: 477 if (*(int *)addr) { 478 /* XXX should read into ibuf, but does it matter */ 479 r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT, 480 sc->sc_iid, sc->sc_ibuf, 481 sc->sc_isize); 482 if (r != USBD_NORMAL_COMPLETION) 483 return (EOPNOTSUPP); 484 485 sc->sc_state |= UHID_IMMED; 486 } else 487 sc->sc_state &= ~UHID_IMMED; 488 break; 489 490 case USB_GET_REPORT: 491 re = (struct usb_ctl_report *)addr; 492 switch (re->report) { 493 case UHID_INPUT_REPORT: 494 size = sc->sc_isize; 495 id = sc->sc_iid; 496 break; 497 case UHID_OUTPUT_REPORT: 498 size = sc->sc_osize; 499 id = sc->sc_oid; 500 break; 501 case UHID_FEATURE_REPORT: 502 size = sc->sc_fsize; 503 id = sc->sc_fid; 504 break; 505 default: 506 return (EINVAL); 507 } 508 r = usbd_get_report(sc->sc_iface, re->report, id, 509 re->data, size); 510 if (r != USBD_NORMAL_COMPLETION) 511 return (EIO); 512 break; 513 514 default: 515 return (EINVAL); 516 } 517 return (0); 518 } 519 520 int 521 uhidpoll(dev, events, p) 522 dev_t dev; 523 int events; 524 struct proc *p; 525 { 526 int revents = 0; 527 int s; 528 USB_GET_SC(uhid, UHIDUNIT(dev), sc); 529 530 if (sc->sc_disconnected) 531 return (EIO); 532 533 s = splusb(); 534 if (events & (POLLOUT | POLLWRNORM)) 535 revents |= events & (POLLOUT | POLLWRNORM); 536 if (events & (POLLIN | POLLRDNORM)) { 537 if (sc->sc_q.c_cc > 0) 538 revents |= events & (POLLIN | POLLRDNORM); 539 else 540 selrecord(p, &sc->sc_rsel); 541 } 542 543 splx(s); 544 return (revents); 545 } 546 547 #if defined(__FreeBSD__) 548 DRIVER_MODULE(uhid, usb, uhid_driver, uhid_devclass, usbd_driver_load, 0); 549 #endif 550
Indexes created Thu Oct 02 14:10:14 GMT 2025