irmce.c revision 1.1.36.1
1 /* $NetBSD: irmce.c,v 1.1.36.1 2016/09/06 20:33:09 skrll Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 Jared D. McNeill <jmcneill (at) invisible.ca> 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' 17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * IR receiver/transceiver for Windows Media Center 31 */ 32 33 #include <sys/cdefs.h> 34 __KERNEL_RCSID(0, "$NetBSD: irmce.c,v 1.1.36.1 2016/09/06 20:33:09 skrll Exp $"); 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/device.h> 40 #include <sys/conf.h> 41 #include <sys/bus.h> 42 #include <sys/select.h> 43 #include <sys/module.h> 44 45 #include <dev/usb/usb.h> 46 #include <dev/usb/usbdi.h> 47 #include <dev/usb/usbdi_util.h> 48 #include <dev/usb/usbdevs.h> 49 50 #include <dev/ir/ir.h> 51 #include <dev/ir/cirio.h> 52 #include <dev/ir/cirvar.h> 53 54 enum irmce_state { 55 IRMCE_STATE_HEADER, 56 IRMCE_STATE_IRDATA, 57 IRMCE_STATE_CMDHEADER, 58 IRMCE_STATE_CMDDATA, 59 }; 60 61 struct irmce_softc { 62 device_t sc_dev; 63 device_t sc_cirdev; 64 65 struct usbd_device * sc_udev; 66 struct usbd_interface * sc_iface; 67 68 int sc_bulkin_ep; 69 uint16_t sc_bulkin_maxpktsize; 70 struct usbd_pipe * sc_bulkin_pipe; 71 struct usbd_xfer * sc_bulkin_xfer; 72 uint8_t * sc_bulkin_buffer; 73 74 int sc_bulkout_ep; 75 uint16_t sc_bulkout_maxpktsize; 76 struct usbd_pipe * sc_bulkout_pipe; 77 struct usbd_xfer * sc_bulkout_xfer; 78 uint8_t * sc_bulkout_buffer; 79 80 bool sc_raw; 81 82 uint8_t sc_ir_buf[16]; 83 size_t sc_ir_bufused; 84 size_t sc_ir_resid; 85 enum irmce_state sc_ir_state; 86 uint8_t sc_ir_header; 87 88 bool sc_rc6_hb[256]; 89 size_t sc_rc6_nhb; 90 }; 91 92 static int irmce_match(device_t, cfdata_t, void *); 93 static void irmce_attach(device_t, device_t, void *); 94 static int irmce_detach(device_t, int); 95 static void irmce_childdet(device_t, device_t); 96 static int irmce_activate(device_t, enum devact); 97 static int irmce_rescan(device_t, const char *, const int *); 98 99 static int irmce_print(void *, const char *); 100 101 static int irmce_reset(struct irmce_softc *); 102 103 static int irmce_open(void *, int, int, struct proc *); 104 static int irmce_close(void *, int, int, struct proc *); 105 static int irmce_read(void *, struct uio *, int); 106 static int irmce_write(void *, struct uio *, int); 107 static int irmce_setparams(void *, struct cir_params *); 108 109 static const struct cir_methods irmce_cir_methods = { 110 .im_open = irmce_open, 111 .im_close = irmce_close, 112 .im_read = irmce_read, 113 .im_write = irmce_write, 114 .im_setparams = irmce_setparams, 115 }; 116 117 static const struct { 118 uint16_t vendor; 119 uint16_t product; 120 } irmce_devices[] = { 121 { USB_VENDOR_SMK, USB_PRODUCT_SMK_MCE_IR }, 122 }; 123 124 CFATTACH_DECL2_NEW(irmce, sizeof(struct irmce_softc), 125 irmce_match, irmce_attach, irmce_detach, irmce_activate, 126 irmce_rescan, irmce_childdet); 127 128 static int 129 irmce_match(device_t parent, cfdata_t match, void *opaque) 130 { 131 struct usbif_attach_arg *uiaa = opaque; 132 unsigned int i; 133 134 for (i = 0; i < __arraycount(irmce_devices); i++) { 135 if (irmce_devices[i].vendor == uiaa->uiaa_vendor && 136 irmce_devices[i].product == uiaa->uiaa_product) 137 return UMATCH_VENDOR_PRODUCT; 138 } 139 140 return UMATCH_NONE; 141 } 142 143 static void 144 irmce_attach(device_t parent, device_t self, void *opaque) 145 { 146 struct irmce_softc *sc = device_private(self); 147 struct usbif_attach_arg *uiaa = opaque; 148 usb_endpoint_descriptor_t *ed; 149 char *devinfop; 150 unsigned int i; 151 uint8_t nep; 152 153 pmf_device_register(self, NULL, NULL); 154 155 aprint_naive("\n"); 156 157 devinfop = usbd_devinfo_alloc(uiaa->uiaa_device, 0); 158 aprint_normal(": %s\n", devinfop); 159 usbd_devinfo_free(devinfop); 160 161 sc->sc_dev = self; 162 sc->sc_udev = uiaa->uiaa_device; 163 sc->sc_iface = uiaa->uiaa_iface; 164 165 nep = 0; 166 usbd_endpoint_count(sc->sc_iface, &nep); 167 sc->sc_bulkin_ep = sc->sc_bulkout_ep = -1; 168 for (i = 0; i < nep; i++) { 169 int dir, type; 170 171 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 172 if (ed == NULL) { 173 aprint_error_dev(self, 174 "couldn't read endpoint descriptor %d\n", i); 175 continue; 176 } 177 178 dir = UE_GET_DIR(ed->bEndpointAddress); 179 type = UE_GET_XFERTYPE(ed->bmAttributes); 180 181 if (type != UE_BULK) 182 continue; 183 184 if (dir == UE_DIR_IN && sc->sc_bulkin_ep == -1) { 185 sc->sc_bulkin_ep = ed->bEndpointAddress; 186 sc->sc_bulkin_maxpktsize = 187 UE_GET_SIZE(UGETW(ed->wMaxPacketSize)) * 188 (UE_GET_TRANS(UGETW(ed->wMaxPacketSize)) + 1); 189 } 190 if (dir == UE_DIR_OUT && sc->sc_bulkout_ep == -1) { 191 sc->sc_bulkout_ep = ed->bEndpointAddress; 192 sc->sc_bulkout_maxpktsize = 193 UE_GET_SIZE(UGETW(ed->wMaxPacketSize)) * 194 (UE_GET_TRANS(UGETW(ed->wMaxPacketSize)) + 1); 195 } 196 } 197 198 aprint_debug_dev(self, "in 0x%02x/%d out 0x%02x/%d\n", 199 sc->sc_bulkin_ep, sc->sc_bulkin_maxpktsize, 200 sc->sc_bulkout_ep, sc->sc_bulkout_maxpktsize); 201 202 if (sc->sc_bulkin_maxpktsize < 16 || sc->sc_bulkout_maxpktsize < 16) { 203 aprint_error_dev(self, "bad maxpktsize\n"); 204 return; 205 } 206 usbd_status err; 207 208 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkin_ep, 209 USBD_EXCLUSIVE_USE, &sc->sc_bulkin_pipe); 210 if (err) { 211 aprint_error_dev(sc->sc_dev, 212 "couldn't open bulk-in pipe: %s\n", usbd_errstr(err)); 213 return; 214 } 215 err = usbd_open_pipe(sc->sc_iface, sc->sc_bulkout_ep, 216 USBD_EXCLUSIVE_USE, &sc->sc_bulkout_pipe); 217 if (err) { 218 aprint_error_dev(sc->sc_dev, 219 "couldn't open bulk-out pipe: %s\n", usbd_errstr(err)); 220 usbd_close_pipe(sc->sc_bulkin_pipe); 221 sc->sc_bulkin_pipe = NULL; 222 return; 223 } 224 225 int error; 226 error = usbd_create_xfer(sc->sc_bulkin_pipe, sc->sc_bulkin_maxpktsize, 227 USBD_SHORT_XFER_OK, 0, &sc->sc_bulkin_xfer); 228 if (error) { 229 goto fail; 230 } 231 232 error = usbd_create_xfer(sc->sc_bulkout_pipe, 233 sc->sc_bulkout_maxpktsize, USBD_FORCE_SHORT_XFER, 0, 234 &sc->sc_bulkout_xfer); 235 if (error) { 236 goto fail; 237 } 238 sc->sc_bulkin_buffer = usbd_get_buffer(sc->sc_bulkin_xfer); 239 sc->sc_bulkout_buffer = usbd_get_buffer(sc->sc_bulkout_xfer); 240 241 irmce_rescan(self, NULL, NULL); 242 return; 243 244 fail: 245 if (sc->sc_bulkin_xfer) 246 usbd_destroy_xfer(sc->sc_bulkin_xfer); 247 if (sc->sc_bulkout_xfer) 248 usbd_destroy_xfer(sc->sc_bulkout_xfer); 249 } 250 251 static int 252 irmce_detach(device_t self, int flags) 253 { 254 struct irmce_softc *sc = device_private(self); 255 int error; 256 257 if (sc->sc_cirdev) { 258 error = config_detach(sc->sc_cirdev, flags); 259 if (error) 260 return error; 261 } 262 263 if (sc->sc_bulkin_pipe) { 264 usbd_abort_pipe(sc->sc_bulkin_pipe); 265 } 266 if (sc->sc_bulkout_pipe) { 267 usbd_abort_pipe(sc->sc_bulkout_pipe); 268 } 269 if (sc->sc_bulkin_xfer) { 270 usbd_destroy_xfer(sc->sc_bulkin_xfer); 271 sc->sc_bulkin_buffer = NULL; 272 sc->sc_bulkin_xfer = NULL; 273 } 274 if (sc->sc_bulkout_xfer) { 275 usbd_destroy_xfer(sc->sc_bulkout_xfer); 276 sc->sc_bulkout_buffer = NULL; 277 sc->sc_bulkout_xfer = NULL; 278 } 279 if (sc->sc_bulkin_pipe) { 280 usbd_close_pipe(sc->sc_bulkin_pipe); 281 sc->sc_bulkin_pipe = NULL; 282 } 283 if (sc->sc_bulkout_pipe) { 284 usbd_close_pipe(sc->sc_bulkout_pipe); 285 sc->sc_bulkout_pipe = NULL; 286 } 287 288 pmf_device_deregister(self); 289 290 return 0; 291 } 292 293 static int 294 irmce_activate(device_t self, enum devact act) 295 { 296 return 0; 297 } 298 299 static int 300 irmce_rescan(device_t self, const char *ifattr, const int *locators) 301 { 302 struct irmce_softc *sc = device_private(self); 303 struct ir_attach_args iaa; 304 305 if (sc->sc_cirdev == NULL) { 306 iaa.ia_type = IR_TYPE_CIR; 307 iaa.ia_methods = &irmce_cir_methods; 308 iaa.ia_handle = sc; 309 sc->sc_cirdev = config_found_ia(self, "irbus", 310 &iaa, irmce_print); 311 } 312 313 return 0; 314 } 315 316 static int 317 irmce_print(void *priv, const char *pnp) 318 { 319 if (pnp) 320 aprint_normal("cir at %s", pnp); 321 322 return UNCONF; 323 } 324 325 static void 326 irmce_childdet(device_t self, device_t child) 327 { 328 struct irmce_softc *sc = device_private(self); 329 330 if (sc->sc_cirdev == child) 331 sc->sc_cirdev = NULL; 332 } 333 334 static int 335 irmce_reset(struct irmce_softc *sc) 336 { 337 static const uint8_t reset_cmd[] = { 0x00, 0xff, 0xaa }; 338 uint8_t *p = sc->sc_bulkout_buffer; 339 usbd_status err; 340 uint32_t wlen; 341 unsigned int n; 342 343 for (n = 0; n < __arraycount(reset_cmd); n++) 344 *p++ = reset_cmd[n]; 345 346 wlen = sizeof(reset_cmd); 347 err = usbd_bulk_transfer(sc->sc_bulkout_xfer, sc->sc_bulkout_pipe, 348 USBD_FORCE_SHORT_XFER, USBD_DEFAULT_TIMEOUT, 349 sc->sc_bulkout_buffer, &wlen); 350 if (err != USBD_NORMAL_COMPLETION) { 351 if (err == USBD_INTERRUPTED) 352 return EINTR; 353 else if (err == USBD_TIMEOUT) 354 return ETIMEDOUT; 355 else 356 return EIO; 357 } 358 359 return 0; 360 } 361 362 static int 363 irmce_open(void *priv, int flag, int mode, struct proc *p) 364 { 365 struct irmce_softc *sc = priv; 366 int err = irmce_reset(sc); 367 if (err) { 368 aprint_error_dev(sc->sc_dev, 369 "couldn't reset device: %s\n", usbd_errstr(err)); 370 } 371 sc->sc_ir_state = IRMCE_STATE_HEADER; 372 sc->sc_rc6_nhb = 0; 373 374 return 0; 375 } 376 377 static int 378 irmce_close(void *priv, int flag, int mode, struct proc *p) 379 { 380 struct irmce_softc *sc = priv; 381 382 if (sc->sc_bulkin_pipe) { 383 usbd_abort_pipe(sc->sc_bulkin_pipe); 384 } 385 if (sc->sc_bulkout_pipe) { 386 usbd_abort_pipe(sc->sc_bulkout_pipe); 387 } 388 389 return 0; 390 } 391 392 static int 393 irmce_rc6_decode(struct irmce_softc *sc, uint8_t *buf, size_t buflen, 394 struct uio *uio) 395 { 396 bool *hb = &sc->sc_rc6_hb[0]; 397 unsigned int n; 398 int state, pulse; 399 uint32_t data; 400 uint8_t mode; 401 bool idle = false; 402 403 for (n = 0; n < buflen; n++) { 404 state = (buf[n] & 0x80) ? 1 : 0; 405 pulse = (buf[n] & 0x7f) * 50; 406 407 if (pulse >= 300 && pulse <= 600) { 408 hb[sc->sc_rc6_nhb++] = state; 409 } else if (pulse >= 680 && pulse <= 1080) { 410 hb[sc->sc_rc6_nhb++] = state; 411 hb[sc->sc_rc6_nhb++] = state; 412 } else if (pulse >= 1150 && pulse <= 1450) { 413 hb[sc->sc_rc6_nhb++] = state; 414 hb[sc->sc_rc6_nhb++] = state; 415 hb[sc->sc_rc6_nhb++] = state; 416 } else if (pulse >= 2400 && pulse <= 2800) { 417 hb[sc->sc_rc6_nhb++] = state; 418 hb[sc->sc_rc6_nhb++] = state; 419 hb[sc->sc_rc6_nhb++] = state; 420 hb[sc->sc_rc6_nhb++] = state; 421 hb[sc->sc_rc6_nhb++] = state; 422 hb[sc->sc_rc6_nhb++] = state; 423 } else if (pulse > 3000) { 424 if (sc->sc_rc6_nhb & 1) 425 hb[sc->sc_rc6_nhb++] = state; 426 idle = true; 427 break; 428 } else { 429 aprint_debug_dev(sc->sc_dev, 430 "error parsing RC6 stream (pulse=%d)\n", pulse); 431 return EIO; 432 } 433 } 434 435 if (!idle) 436 return 0; 437 438 if (sc->sc_rc6_nhb < 20) { 439 aprint_debug_dev(sc->sc_dev, "not enough RC6 data\n"); 440 return EIO; 441 } 442 443 /* RC6 leader 11111100 */ 444 if (!hb[0] || !hb[1] || !hb[2] || !hb[3] || !hb[4] || !hb[5] || 445 hb[6] || hb[7]) { 446 aprint_debug_dev(sc->sc_dev, "bad RC6 leader\n"); 447 return EIO; 448 } 449 450 /* start bit 10 */ 451 if (!hb[8] || hb[9]) { 452 aprint_debug_dev(sc->sc_dev, "missing RC6 start bit\n"); 453 return EIO; 454 } 455 456 /* mode info */ 457 mode = 0x00; 458 for (n = 10; n < 15; n += 2) { 459 if (hb[n] && !hb[n + 1]) 460 mode = (mode << 1) | 1; 461 else if (!hb[n] && hb[n + 1]) 462 mode = (mode << 1) | 0; 463 else { 464 aprint_debug_dev(sc->sc_dev, "bad RC6 mode bits\n"); 465 return EIO; 466 } 467 } 468 469 data = 0; 470 for (n = 20; n < sc->sc_rc6_nhb; n += 2) { 471 if (hb[n] && !hb[n + 1]) 472 data = (data << 1) | 1; 473 else if (!hb[n] && hb[n + 1]) 474 data = (data << 1) | 0; 475 else { 476 aprint_debug_dev(sc->sc_dev, "bad RC6 data bits\n"); 477 return EIO; 478 } 479 } 480 481 sc->sc_rc6_nhb = 0; 482 483 return uiomove(&data, sizeof(data), uio); 484 } 485 486 static int 487 irmce_process(struct irmce_softc *sc, uint8_t *buf, size_t buflen, 488 struct uio *uio) 489 { 490 uint8_t *p = buf; 491 uint8_t data, cmd; 492 int error; 493 494 while (p - buf < (ssize_t)buflen) { 495 switch (sc->sc_ir_state) { 496 case IRMCE_STATE_HEADER: 497 sc->sc_ir_header = data = *p++; 498 if ((data & 0xe0) == 0x80 && (data & 0x1f) != 0x1f) { 499 sc->sc_ir_bufused = 0; 500 sc->sc_ir_resid = data & 0x1f; 501 sc->sc_ir_state = IRMCE_STATE_IRDATA; 502 if (sc->sc_ir_resid > sizeof(sc->sc_ir_buf)) 503 return EIO; 504 if (sc->sc_ir_resid == 0) 505 sc->sc_ir_state = IRMCE_STATE_HEADER; 506 } else { 507 sc->sc_ir_state = IRMCE_STATE_CMDHEADER; 508 } 509 break; 510 case IRMCE_STATE_CMDHEADER: 511 cmd = *p++; 512 data = sc->sc_ir_header; 513 if (data == 0x00 && cmd == 0x9f) 514 sc->sc_ir_resid = 1; 515 else if (data == 0xff && cmd == 0x0b) 516 sc->sc_ir_resid = 2; 517 else if (data == 0x9f) { 518 if (cmd == 0x04 || cmd == 0x06 || 519 cmd == 0x0c || cmd == 0x15) { 520 sc->sc_ir_resid = 2; 521 } else if (cmd == 0x01 || cmd == 0x08 || 522 cmd == 0x14) { 523 sc->sc_ir_resid = 1; 524 } 525 } 526 if (sc->sc_ir_resid > 0) 527 sc->sc_ir_state = IRMCE_STATE_CMDDATA; 528 else 529 sc->sc_ir_state = IRMCE_STATE_HEADER; 530 break; 531 case IRMCE_STATE_IRDATA: 532 sc->sc_ir_resid--; 533 sc->sc_ir_buf[sc->sc_ir_bufused++] = *p; 534 p++; 535 if (sc->sc_ir_resid == 0) { 536 sc->sc_ir_state = IRMCE_STATE_HEADER; 537 error = irmce_rc6_decode(sc, 538 sc->sc_ir_buf, sc->sc_ir_bufused, uio); 539 if (error) 540 sc->sc_rc6_nhb = 0; 541 } 542 break; 543 case IRMCE_STATE_CMDDATA: 544 p++; 545 sc->sc_ir_resid--; 546 if (sc->sc_ir_resid == 0) 547 sc->sc_ir_state = IRMCE_STATE_HEADER; 548 break; 549 } 550 551 } 552 553 return 0; 554 } 555 556 static int 557 irmce_read(void *priv, struct uio *uio, int flag) 558 { 559 struct irmce_softc *sc = priv; 560 usbd_status err; 561 uint32_t rlen; 562 int error = 0; 563 564 while (uio->uio_resid > 0) { 565 rlen = sc->sc_bulkin_maxpktsize; 566 err = usbd_bulk_transfer(sc->sc_bulkin_xfer, 567 sc->sc_bulkin_pipe, USBD_SHORT_XFER_OK, 568 USBD_DEFAULT_TIMEOUT, sc->sc_bulkin_buffer, &rlen); 569 if (err != USBD_NORMAL_COMPLETION) { 570 if (err == USBD_INTERRUPTED) 571 return EINTR; 572 else if (err == USBD_TIMEOUT) 573 continue; 574 else 575 return EIO; 576 } 577 578 if (sc->sc_raw) { 579 error = uiomove(sc->sc_bulkin_buffer, rlen, uio); 580 break; 581 } else { 582 error = irmce_process(sc, sc->sc_bulkin_buffer, 583 rlen, uio); 584 if (error) 585 break; 586 } 587 } 588 589 return error; 590 } 591 592 static int 593 irmce_write(void *priv, struct uio *uio, int flag) 594 { 595 return EIO; 596 } 597 598 static int 599 irmce_setparams(void *priv, struct cir_params *params) 600 { 601 struct irmce_softc *sc = priv; 602 603 if (params->raw > 1) 604 return EINVAL; 605 sc->sc_raw = params->raw; 606 607 return 0; 608 } 609 610 MODULE(MODULE_CLASS_DRIVER, irmce, NULL); 611 612 #ifdef _MODULE 613 #include "ioconf.c" 614 #endif 615 616 static int 617 irmce_modcmd(modcmd_t cmd, void *opaque) 618 { 619 switch (cmd) { 620 case MODULE_CMD_INIT: 621 #ifdef _MODULE 622 return config_init_component(cfdriver_ioconf_irmce, 623 cfattach_ioconf_irmce, cfdata_ioconf_irmce); 624 #else 625 return 0; 626 #endif 627 case MODULE_CMD_FINI: 628 #ifdef _MODULE 629 return config_fini_component(cfdriver_ioconf_irmce, 630 cfattach_ioconf_irmce, cfdata_ioconf_irmce); 631 #else 632 return 0; 633 #endif 634 default: 635 return ENOTTY; 636 } 637 } 638
Indexes created Fri Oct 03 02:09:57 GMT 2025