uhid.c revision 1.5
1 /* $NetBSD: uhid.c,v 1.5 1998/11/21 18:57:09 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Author: Lennart Augustsson <augustss (at) carlstedt.se> 8 * Carlstedt Research & Technology 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/malloc.h> 44 #include <sys/device.h> 45 #include <sys/ioctl.h> 46 #include <sys/tty.h> 47 #include <sys/file.h> 48 #include <sys/select.h> 49 #include <sys/proc.h> 50 #include <sys/vnode.h> 51 #include <sys/device.h> 52 #include <sys/poll.h> 53 54 #include <dev/usb/usb.h> 55 #include <dev/usb/usbhid.h> 56 57 #include <dev/usb/usbdi.h> 58 #include <dev/usb/usbdi_util.h> 59 #include <dev/usb/hid.h> 60 #include <dev/usb/usb_quirks.h> 61 62 #ifdef USB_DEBUG 63 #define DPRINTF(x) if (uhiddebug) printf x 64 #define DPRINTFN(n,x) if (uhiddebug>(n)) printf x 65 int uhiddebug = 0; 66 #else 67 #define DPRINTF(x) 68 #define DPRINTFN(n,x) 69 #endif 70 71 struct uhid_softc { 72 struct device sc_dev; /* base device */ 73 usbd_interface_handle sc_iface; /* interface */ 74 usbd_pipe_handle sc_intrpipe; /* interrupt pipe */ 75 int sc_ep_addr; 76 77 int sc_isize; 78 int sc_osize; 79 int sc_fsize; 80 u_int8_t sc_iid; 81 u_int8_t sc_oid; 82 u_int8_t sc_fid; 83 84 char *sc_ibuf; 85 char *sc_obuf; 86 87 void *sc_repdesc; 88 int sc_repdesc_size; 89 90 struct clist sc_q; 91 struct selinfo sc_rsel; 92 u_char sc_state; /* driver state */ 93 #define UHID_OPEN 0x01 /* device is open */ 94 #define UHID_ASLP 0x02 /* waiting for device data */ 95 #define UHID_NEEDCLEAR 0x04 /* needs clearing endpoint stall */ 96 #define UHID_IMMED 0x08 /* return read data immediately */ 97 int sc_disconnected; /* device is gone */ 98 }; 99 100 #define UHIDUNIT(dev) (minor(dev)) 101 #define UHID_CHUNK 128 /* chunk size for read */ 102 #define UHID_BSIZE 1020 /* buffer size */ 103 104 int uhid_match __P((struct device *, struct cfdata *, void *)); 105 void uhid_attach __P((struct device *, struct device *, void *)); 106 107 int uhidopen __P((dev_t, int, int, struct proc *)); 108 int uhidclose __P((dev_t, int, int, struct proc *p)); 109 int uhidread __P((dev_t, struct uio *uio, int)); 110 int uhidwrite __P((dev_t, struct uio *uio, int)); 111 int uhidioctl __P((dev_t, u_long, caddr_t, int, struct proc *)); 112 int uhidpoll __P((dev_t, int, struct proc *)); 113 void uhid_intr __P((usbd_request_handle, usbd_private_handle, usbd_status)); 114 void uhid_disco __P((void *)); 115 116 extern struct cfdriver uhid_cd; 117 118 struct cfattach uhid_ca = { 119 sizeof(struct uhid_softc), uhid_match, uhid_attach 120 }; 121 122 int 123 uhid_match(parent, match, aux) 124 struct device *parent; 125 struct cfdata *match; 126 void *aux; 127 { 128 struct usb_attach_arg *uaa = aux; 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 void 140 uhid_attach(parent, self, aux) 141 struct device *parent; 142 struct device *self; 143 void *aux; 144 { 145 struct uhid_softc *sc = (struct uhid_softc *)self; 146 struct usb_attach_arg *uaa = aux; 147 usbd_interface_handle iface = uaa->iface; 148 usb_interface_descriptor_t *id; 149 usb_endpoint_descriptor_t *ed; 150 int size; 151 void *desc; 152 usbd_status r; 153 char devinfo[1024]; 154 155 sc->sc_disconnected = 1; 156 sc->sc_iface = iface; 157 id = usbd_get_interface_descriptor(iface); 158 usbd_devinfo(uaa->device, 0, devinfo); 159 printf(": %s (interface class %d/%d)\n", devinfo, 160 id->bInterfaceClass, id->bInterfaceSubClass); 161 ed = usbd_interface2endpoint_descriptor(iface, 0); 162 if (!ed) { 163 printf("%s: could not read endpoint descriptor\n", 164 sc->sc_dev.dv_xname); 165 return; 166 } 167 168 DPRINTFN(10,("uhid_attach: \ 169 bLength=%d bDescriptorType=%d bEndpointAddress=%d-%s bmAttributes=%d wMaxPacketSize=%d bInterval=%d\n", 170 ed->bLength, ed->bDescriptorType, ed->bEndpointAddress & UE_ADDR, 171 ed->bEndpointAddress & UE_IN ? "in" : "out", 172 ed->bmAttributes & UE_XFERTYPE, 173 UGETW(ed->wMaxPacketSize), ed->bInterval)); 174 175 if ((ed->bEndpointAddress & UE_IN) != UE_IN || 176 (ed->bmAttributes & UE_XFERTYPE) != UE_INTERRUPT) { 177 printf("%s: unexpected endpoint\n", 178 sc->sc_dev.dv_xname); 179 return; 180 } 181 182 sc->sc_ep_addr = ed->bEndpointAddress; 183 sc->sc_disconnected = 0; 184 185 r = usbd_alloc_report_desc(uaa->iface, &desc, &size, M_USB); 186 if (r != USBD_NORMAL_COMPLETION) { 187 printf("%s: no report descriptor\n", sc->sc_dev.dv_xname); 188 return; 189 } 190 191 (void)usbd_set_idle(iface, 0, 0); 192 193 sc->sc_isize = hid_report_size(desc, size, hid_input, &sc->sc_iid); 194 sc->sc_osize = hid_report_size(desc, size, hid_output, &sc->sc_oid); 195 sc->sc_fsize = hid_report_size(desc, size, hid_feature, &sc->sc_fid); 196 197 sc->sc_repdesc = desc; 198 sc->sc_repdesc_size = size; 199 } 200 201 void 202 uhid_disco(p) 203 void *p; 204 { 205 struct uhid_softc *sc = p; 206 207 DPRINTF(("ums_hid: sc=%p\n", sc)); 208 usbd_abort_pipe(sc->sc_intrpipe); 209 sc->sc_disconnected = 1; 210 } 211 212 void 213 uhid_intr(reqh, addr, status) 214 usbd_request_handle reqh; 215 usbd_private_handle addr; 216 usbd_status status; 217 { 218 struct uhid_softc *sc = addr; 219 220 DPRINTFN(5, ("uhid_intr: status=%d\n", status)); 221 DPRINTFN(5, ("uhid_intr: data = %02x %02x %02x\n", 222 sc->sc_ibuf[0], sc->sc_ibuf[1], sc->sc_ibuf[2])); 223 224 if (status == USBD_CANCELLED) 225 return; 226 227 if (status != USBD_NORMAL_COMPLETION) { 228 DPRINTF(("uhid_intr: status=%d\n", status)); 229 sc->sc_state |= UHID_NEEDCLEAR; 230 return; 231 } 232 233 (void) b_to_q(sc->sc_ibuf, sc->sc_isize, &sc->sc_q); 234 235 if (sc->sc_state & UHID_ASLP) { 236 sc->sc_state &= ~UHID_ASLP; 237 DPRINTFN(5, ("uhid_intr: waking %p\n", sc)); 238 wakeup((caddr_t)sc); 239 } 240 selwakeup(&sc->sc_rsel); 241 } 242 243 int 244 uhidopen(dev, flag, mode, p) 245 dev_t dev; 246 int flag; 247 int mode; 248 struct proc *p; 249 { 250 int unit = UHIDUNIT(dev); 251 struct uhid_softc *sc; 252 usbd_status r; 253 254 if (unit >= uhid_cd.cd_ndevs) 255 return ENXIO; 256 sc = uhid_cd.cd_devs[unit]; 257 if (!sc) 258 return ENXIO; 259 260 DPRINTF(("uhidopen: sc=%p, disco=%d\n", sc, sc->sc_disconnected)); 261 262 if (sc->sc_disconnected) 263 return (EIO); 264 265 if (sc->sc_state & UHID_OPEN) 266 return EBUSY; 267 268 if (clalloc(&sc->sc_q, UHID_BSIZE, 0) == -1) 269 return ENOMEM; 270 271 sc->sc_state |= UHID_OPEN; 272 sc->sc_state &= ~UHID_IMMED; 273 274 sc->sc_ibuf = malloc(sc->sc_isize, M_USB, M_WAITOK); 275 sc->sc_obuf = malloc(sc->sc_osize, M_USB, M_WAITOK); 276 277 /* Set up interrupt pipe. */ 278 r = usbd_open_pipe_intr(sc->sc_iface, sc->sc_ep_addr, 279 USBD_SHORT_XFER_OK, 280 &sc->sc_intrpipe, sc, sc->sc_ibuf, 281 sc->sc_isize, uhid_intr); 282 if (r != USBD_NORMAL_COMPLETION) { 283 DPRINTF(("uhidopen: usbd_open_pipe_intr failed, error=%d\n",r)); 284 sc->sc_state &= ~UHID_OPEN; 285 return (EIO); 286 } 287 usbd_set_disco(sc->sc_intrpipe, uhid_disco, sc); 288 289 return 0; 290 } 291 292 int 293 uhidclose(dev, flag, mode, p) 294 dev_t dev; 295 int flag; 296 int mode; 297 struct proc *p; 298 { 299 struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)]; 300 301 if (sc->sc_disconnected) 302 return (EIO); 303 304 DPRINTF(("uhidclose: sc=%p\n", sc)); 305 306 /* Disable interrupts. */ 307 usbd_abort_pipe(sc->sc_intrpipe); 308 usbd_close_pipe(sc->sc_intrpipe); 309 310 sc->sc_state &= ~UHID_OPEN; 311 312 clfree(&sc->sc_q); 313 314 free(sc->sc_ibuf, M_USB); 315 free(sc->sc_obuf, M_USB); 316 317 return 0; 318 } 319 320 int 321 uhidread(dev, uio, flag) 322 dev_t dev; 323 struct uio *uio; 324 int flag; 325 { 326 struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)]; 327 int s; 328 int error = 0; 329 size_t length; 330 u_char buffer[UHID_CHUNK]; 331 usbd_status r; 332 333 if (sc->sc_disconnected) 334 return (EIO); 335 336 DPRINTFN(1, ("uhidread\n")); 337 if (sc->sc_state & UHID_IMMED) { 338 DPRINTFN(1, ("uhidread immed\n")); 339 340 r = usbd_get_report(sc->sc_iface, UHID_INPUT_REPORT, 341 sc->sc_iid, sc->sc_ibuf, sc->sc_isize); 342 if (r != USBD_NORMAL_COMPLETION) 343 return (EIO); 344 return (uiomove(buffer, sc->sc_isize, uio)); 345 } 346 347 s = spltty(); 348 while (sc->sc_q.c_cc == 0) { 349 if (flag & IO_NDELAY) { 350 splx(s); 351 return EWOULDBLOCK; 352 } 353 sc->sc_state |= UHID_ASLP; 354 DPRINTFN(5, ("uhidread: sleep on %p\n", sc)); 355 error = tsleep((caddr_t)sc, PZERO | PCATCH, "uhidrea", 0); 356 DPRINTFN(5, ("uhidread: woke, error=%d\n", error)); 357 if (error) { 358 sc->sc_state &= ~UHID_ASLP; 359 splx(s); 360 return (error); 361 } 362 if (sc->sc_state & UHID_NEEDCLEAR) { 363 DPRINTFN(-1,("uhidread: clearing stall\n")); 364 sc->sc_state &= ~UHID_NEEDCLEAR; 365 usbd_clear_endpoint_stall(sc->sc_intrpipe); 366 } 367 } 368 splx(s); 369 370 /* Transfer as many chunks as possible. */ 371 while (sc->sc_q.c_cc > 0 && uio->uio_resid > 0) { 372 length = min(sc->sc_q.c_cc, uio->uio_resid); 373 if (length > sizeof(buffer)) 374 length = sizeof(buffer); 375 376 /* Remove a small chunk from the input queue. */ 377 (void) q_to_b(&sc->sc_q, buffer, length); 378 DPRINTFN(5, ("uhidread: got %d chars\n", length)); 379 380 /* Copy the data to the user process. */ 381 if ((error = uiomove(buffer, length, uio)) != 0) 382 break; 383 } 384 385 return (error); 386 } 387 388 int 389 uhidwrite(dev, uio, flag) 390 dev_t dev; 391 struct uio *uio; 392 int flag; 393 { 394 struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)]; 395 int error; 396 int size; 397 usbd_status r; 398 399 if (sc->sc_disconnected) 400 return (EIO); 401 402 DPRINTFN(1, ("uhidwrite\n")); 403 404 size = sc->sc_osize; 405 error = 0; 406 while (uio->uio_resid > 0) { 407 if (uio->uio_resid != size) 408 return (0); 409 if ((error = uiomove(sc->sc_obuf, size, uio)) != 0) 410 break; 411 if (sc->sc_oid) 412 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 413 sc->sc_obuf[0], 414 sc->sc_obuf+1, size-1); 415 else 416 r = usbd_set_report(sc->sc_iface, UHID_OUTPUT_REPORT, 417 0, sc->sc_obuf, size); 418 if (r != USBD_NORMAL_COMPLETION) { 419 error = EIO; 420 break; 421 } 422 } 423 return (error); 424 } 425 426 int 427 uhidioctl(dev, cmd, addr, flag, p) 428 dev_t dev; 429 u_long cmd; 430 caddr_t addr; 431 int flag; 432 struct proc *p; 433 { 434 struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)]; 435 struct usb_ctl_report_desc *rd; 436 struct usb_ctl_report *re; 437 int size, id; 438 usbd_status r; 439 440 if (sc->sc_disconnected) 441 return (EIO); 442 443 DPRINTFN(2, ("uhidioctl: cmd=%lx\n", cmd)); 444 switch (cmd) { 445 case FIONBIO: 446 /* All handled in the upper FS layer. */ 447 break; 448 449 case USB_GET_REPORT_DESC: 450 rd = (struct usb_ctl_report_desc *)addr; 451 size = min(sc->sc_repdesc_size, sizeof rd->data); 452 rd->size = size; 453 memcpy(rd->data, sc->sc_repdesc, size); 454 break; 455 456 case USB_SET_IMMED: 457 if (*(int *)addr) 458 sc->sc_state |= UHID_IMMED; 459 else 460 sc->sc_state &= ~UHID_IMMED; 461 break; 462 463 case USB_GET_REPORT: 464 re = (struct usb_ctl_report *)addr; 465 switch (re->report) { 466 case UHID_INPUT_REPORT: 467 size = sc->sc_isize; 468 id = sc->sc_iid; 469 break; 470 case UHID_OUTPUT_REPORT: 471 size = sc->sc_osize; 472 id = sc->sc_oid; 473 break; 474 case UHID_FEATURE_REPORT: 475 size = sc->sc_fsize; 476 id = sc->sc_fid; 477 break; 478 default: 479 return (EINVAL); 480 } 481 r = usbd_get_report(sc->sc_iface, re->report, id, 482 re->data, size); 483 if (r != USBD_NORMAL_COMPLETION) 484 return (EIO); 485 break; 486 487 default: 488 return (EINVAL); 489 } 490 return (0); 491 } 492 493 int 494 uhidpoll(dev, events, p) 495 dev_t dev; 496 int events; 497 struct proc *p; 498 { 499 struct uhid_softc *sc = uhid_cd.cd_devs[UHIDUNIT(dev)]; 500 int revents = 0; 501 int s; 502 503 if (sc->sc_disconnected) 504 return (EIO); 505 506 s = spltty(); 507 if (events & (POLLOUT | POLLWRNORM)) 508 revents |= events & (POLLOUT | POLLWRNORM); 509 if (events & (POLLIN | POLLRDNORM)) { 510 if (sc->sc_q.c_cc > 0) 511 revents |= events & (POLLIN | POLLRDNORM); 512 else 513 selrecord(p, &sc->sc_rsel); 514 } 515 516 splx(s); 517 return (revents); 518 } 519
Indexes created Thu Oct 02 14:10:14 GMT 2025