uchcom.c revision 1.35
1 /* $NetBSD: uchcom.c,v 1.35 2020/03/13 18:17:40 christos Exp $ */ 2 3 /* 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Takuya SHIOZAKI (tshiozak (at) netbsd.org). 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: uchcom.c,v 1.35 2020/03/13 18:17:40 christos Exp $"); 34 35 #ifdef _KERNEL_OPT 36 #include "opt_usb.h" 37 #endif 38 39 /* 40 * driver for WinChipHead CH341/340, the worst USB-serial chip in the world. 41 */ 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/kmem.h> 47 #include <sys/ioctl.h> 48 #include <sys/conf.h> 49 #include <sys/tty.h> 50 #include <sys/file.h> 51 #include <sys/select.h> 52 #include <sys/proc.h> 53 #include <sys/device.h> 54 #include <sys/poll.h> 55 56 #include <dev/usb/usb.h> 57 58 #include <dev/usb/usbdi.h> 59 #include <dev/usb/usbdi_util.h> 60 #include <dev/usb/usbdevs.h> 61 62 #include <dev/usb/ucomvar.h> 63 64 #ifdef UCHCOM_DEBUG 65 #define DPRINTFN(n, x) if (uchcomdebug > (n)) printf x 66 int uchcomdebug = 0; 67 #else 68 #define DPRINTFN(n, x) 69 #endif 70 #define DPRINTF(x) DPRINTFN(0, x) 71 72 #define UCHCOM_IFACE_INDEX 0 73 #define UCHCOM_CONFIG_INDEX 0 74 75 #define UCHCOM_INPUT_BUF_SIZE 8 76 77 #define UCHCOM_REQ_GET_VERSION 0x5F 78 #define UCHCOM_REQ_READ_REG 0x95 79 #define UCHCOM_REQ_WRITE_REG 0x9A 80 #define UCHCOM_REQ_RESET 0xA1 81 #define UCHCOM_REQ_SET_DTRRTS 0xA4 82 83 #define UCHCOM_REG_STAT1 0x06 84 #define UCHCOM_REG_STAT2 0x07 85 #define UCHCOM_REG_BPS_PRE 0x12 86 #define UCHCOM_REG_BPS_DIV 0x13 87 #define UCHCOM_REG_BREAK 0x05 88 #define UCHCOM_REG_LCR 0x18 89 #define UCHCOM_REG_LCR2 0x25 90 91 #define UCHCOM_VER_20 0x20 92 #define UCHCOM_VER_30 0x30 93 94 #define UCHCOM_BPS_PRE_IMM 0x80 /* CH341: immediate RX forwarding */ 95 96 #define UCHCOM_DTR_MASK 0x20 97 #define UCHCOM_RTS_MASK 0x40 98 99 #define UCHCOM_BREAK_MASK 0x01 100 101 #define UCHCOM_LCR_CS5 0x00 102 #define UCHCOM_LCR_CS6 0x01 103 #define UCHCOM_LCR_CS7 0x02 104 #define UCHCOM_LCR_CS8 0x03 105 #define UCHCOM_LCR_STOPB 0x04 106 #define UCHCOM_LCR_PARENB 0x08 107 #define UCHCOM_LCR_PARODD 0x00 108 #define UCHCOM_LCR_PAREVEN 0x10 109 #define UCHCOM_LCR_PARMARK 0x20 110 #define UCHCOM_LCR_PARSPACE 0x30 111 #define UCHCOM_LCR_TXE 0x40 112 #define UCHCOM_LCR_RXE 0x80 113 114 #define UCHCOM_INTR_STAT1 0x02 115 #define UCHCOM_INTR_STAT2 0x03 116 #define UCHCOM_INTR_LEAST 4 117 118 #define UCHCOMIBUFSIZE 256 119 #define UCHCOMOBUFSIZE 256 120 121 #define UCHCOM_RESET_VALUE 0x501F 122 #define UCHCOM_RESET_INDEX 0xD90A 123 124 struct uchcom_softc 125 { 126 device_t sc_dev; 127 struct usbd_device * sc_udev; 128 device_t sc_subdev; 129 struct usbd_interface * sc_iface; 130 bool sc_dying; 131 /* */ 132 int sc_intr_endpoint; 133 int sc_intr_size; 134 struct usbd_pipe * sc_intr_pipe; 135 u_char *sc_intr_buf; 136 /* */ 137 uint8_t sc_version; 138 int sc_dtr; 139 int sc_rts; 140 u_char sc_lsr; 141 u_char sc_msr; 142 }; 143 144 struct uchcom_endpoints 145 { 146 int ep_bulkin; 147 int ep_bulkout; 148 int ep_intr; 149 int ep_intr_size; 150 }; 151 152 struct uchcom_divider 153 { 154 uint8_t dv_prescaler; 155 uint8_t dv_div; 156 }; 157 158 static const uint32_t rates4x[8] = { 159 [0] = 4 * 12000000 / 1024, 160 [1] = 4 * 12000000 / 128, 161 [2] = 4 * 12000000 / 16, 162 [3] = 4 * 12000000 / 2, 163 [7] = 4 * 12000000, 164 }; 165 166 static const struct usb_devno uchcom_devs[] = { 167 { USB_VENDOR_QINHENG2, USB_PRODUCT_QINHENG2_CH341SER }, 168 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH340 }, 169 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH341_ASP }, 170 }; 171 #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) 172 173 static void uchcom_get_status(void *, int, u_char *, u_char *); 174 static void uchcom_set(void *, int, int, int); 175 static int uchcom_param(void *, int, struct termios *); 176 static int uchcom_open(void *, int); 177 static void uchcom_close(void *, int); 178 static void uchcom_intr(struct usbd_xfer *, void *, 179 usbd_status); 180 181 static int set_config(struct uchcom_softc *); 182 static int find_ifaces(struct uchcom_softc *, struct usbd_interface **); 183 static int find_endpoints(struct uchcom_softc *, 184 struct uchcom_endpoints *); 185 static void close_intr_pipe(struct uchcom_softc *); 186 187 188 static const struct ucom_methods uchcom_methods = { 189 .ucom_get_status = uchcom_get_status, 190 .ucom_set = uchcom_set, 191 .ucom_param = uchcom_param, 192 .ucom_open = uchcom_open, 193 .ucom_close = uchcom_close, 194 }; 195 196 static int uchcom_match(device_t, cfdata_t, void *); 197 static void uchcom_attach(device_t, device_t, void *); 198 static void uchcom_childdet(device_t, device_t); 199 static int uchcom_detach(device_t, int); 200 201 CFATTACH_DECL2_NEW(uchcom, 202 sizeof(struct uchcom_softc), 203 uchcom_match, 204 uchcom_attach, 205 uchcom_detach, 206 NULL, 207 NULL, 208 uchcom_childdet); 209 210 /* ---------------------------------------------------------------------- 211 * driver entry points 212 */ 213 214 static int 215 uchcom_match(device_t parent, cfdata_t match, void *aux) 216 { 217 struct usb_attach_arg *uaa = aux; 218 219 return (uchcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 220 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 221 } 222 223 static void 224 uchcom_attach(device_t parent, device_t self, void *aux) 225 { 226 struct uchcom_softc *sc = device_private(self); 227 struct usb_attach_arg *uaa = aux; 228 struct usbd_device *dev = uaa->uaa_device; 229 char *devinfop; 230 struct uchcom_endpoints endpoints; 231 struct ucom_attach_args ucaa; 232 233 aprint_naive("\n"); 234 aprint_normal("\n"); 235 236 devinfop = usbd_devinfo_alloc(dev, 0); 237 aprint_normal_dev(self, "%s\n", devinfop); 238 usbd_devinfo_free(devinfop); 239 240 sc->sc_dev = self; 241 sc->sc_udev = dev; 242 sc->sc_dying = false; 243 sc->sc_dtr = sc->sc_rts = -1; 244 sc->sc_lsr = sc->sc_msr = 0; 245 246 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 247 248 if (set_config(sc)) 249 goto failed; 250 251 if (find_ifaces(sc, &sc->sc_iface)) 252 goto failed; 253 254 if (find_endpoints(sc, &endpoints)) 255 goto failed; 256 257 sc->sc_intr_endpoint = endpoints.ep_intr; 258 sc->sc_intr_size = endpoints.ep_intr_size; 259 260 /* setup ucom layer */ 261 ucaa.ucaa_portno = UCOM_UNK_PORTNO; 262 ucaa.ucaa_bulkin = endpoints.ep_bulkin; 263 ucaa.ucaa_bulkout = endpoints.ep_bulkout; 264 ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; 265 ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; 266 ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; 267 ucaa.ucaa_opkthdrlen = 0; 268 ucaa.ucaa_device = dev; 269 ucaa.ucaa_iface = sc->sc_iface; 270 ucaa.ucaa_methods = &uchcom_methods; 271 ucaa.ucaa_arg = sc; 272 ucaa.ucaa_info = NULL; 273 274 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 275 276 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa, 277 ucomprint, ucomsubmatch); 278 279 return; 280 281 failed: 282 sc->sc_dying = true; 283 return; 284 } 285 286 static void 287 uchcom_childdet(device_t self, device_t child) 288 { 289 struct uchcom_softc *sc = device_private(self); 290 291 KASSERT(sc->sc_subdev == child); 292 sc->sc_subdev = NULL; 293 } 294 295 static int 296 uchcom_detach(device_t self, int flags) 297 { 298 struct uchcom_softc *sc = device_private(self); 299 int rv = 0; 300 301 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 302 303 close_intr_pipe(sc); 304 305 sc->sc_dying = true; 306 307 if (sc->sc_subdev != NULL) { 308 rv = config_detach(sc->sc_subdev, flags); 309 sc->sc_subdev = NULL; 310 } 311 312 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 313 314 return rv; 315 } 316 317 static int 318 set_config(struct uchcom_softc *sc) 319 { 320 usbd_status err; 321 322 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 323 if (err) { 324 aprint_error_dev(sc->sc_dev, 325 "failed to set configuration: %s\n", usbd_errstr(err)); 326 return -1; 327 } 328 329 return 0; 330 } 331 332 static int 333 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 334 { 335 usbd_status err; 336 337 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 338 riface); 339 if (err) { 340 aprint_error("\n%s: failed to get interface: %s\n", 341 device_xname(sc->sc_dev), usbd_errstr(err)); 342 return -1; 343 } 344 345 return 0; 346 } 347 348 static int 349 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 350 { 351 int i, bin=-1, bout=-1, intr=-1, isize=0; 352 usb_interface_descriptor_t *id; 353 usb_endpoint_descriptor_t *ed; 354 355 id = usbd_get_interface_descriptor(sc->sc_iface); 356 357 for (i = 0; i < id->bNumEndpoints; i++) { 358 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 359 if (ed == NULL) { 360 aprint_error_dev(sc->sc_dev, 361 "no endpoint descriptor for %d\n", i); 362 return -1; 363 } 364 365 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 366 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 367 intr = ed->bEndpointAddress; 368 isize = UGETW(ed->wMaxPacketSize); 369 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 370 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 371 bin = ed->bEndpointAddress; 372 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 373 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 374 bout = ed->bEndpointAddress; 375 } 376 } 377 378 if (intr == -1 || bin == -1 || bout == -1) { 379 if (intr == -1) { 380 aprint_error_dev(sc->sc_dev, 381 "no interrupt end point\n"); 382 } 383 if (bin == -1) { 384 aprint_error_dev(sc->sc_dev, 385 "no data bulk in end point\n"); 386 } 387 if (bout == -1) { 388 aprint_error_dev(sc->sc_dev, 389 "no data bulk out end point\n"); 390 } 391 return -1; 392 } 393 if (isize < UCHCOM_INTR_LEAST) { 394 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 395 return -1; 396 } 397 398 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 399 device_xname(sc->sc_dev), bin, bout, intr, isize)); 400 401 endpoints->ep_intr = intr; 402 endpoints->ep_intr_size = isize; 403 endpoints->ep_bulkin = bin; 404 endpoints->ep_bulkout = bout; 405 406 return 0; 407 } 408 409 410 /* ---------------------------------------------------------------------- 411 * low level i/o 412 */ 413 414 static __inline usbd_status 415 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 416 uint16_t value, uint16_t index) 417 { 418 usb_device_request_t req; 419 420 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 421 req.bRequest = reqno; 422 USETW(req.wValue, value); 423 USETW(req.wIndex, index); 424 USETW(req.wLength, 0); 425 426 return usbd_do_request(sc->sc_udev, &req, 0); 427 } 428 429 static __inline usbd_status 430 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 431 uint16_t value, uint16_t index, void *buf, int buflen, 432 int *actlen) 433 { 434 usb_device_request_t req; 435 436 req.bmRequestType = UT_READ_VENDOR_DEVICE; 437 req.bRequest = reqno; 438 USETW(req.wValue, value); 439 USETW(req.wIndex, index); 440 USETW(req.wLength, (uint16_t)buflen); 441 442 return usbd_do_request_flags(sc->sc_udev, &req, buf, 443 USBD_SHORT_XFER_OK, actlen, 444 USBD_DEFAULT_TIMEOUT); 445 } 446 447 static __inline usbd_status 448 write_reg(struct uchcom_softc *sc, 449 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 450 { 451 DPRINTF(("%s: write reg %#02X<-%#02X, %#02X<-%#02X\n", 452 device_xname(sc->sc_dev), 453 (unsigned)reg1, (unsigned)val1, 454 (unsigned)reg2, (unsigned)val2)); 455 return generic_control_out( 456 sc, UCHCOM_REQ_WRITE_REG, 457 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 458 } 459 460 static __inline usbd_status 461 read_reg(struct uchcom_softc *sc, 462 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 463 { 464 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 465 usbd_status err; 466 int actin; 467 468 err = generic_control_in( 469 sc, UCHCOM_REQ_READ_REG, 470 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 471 if (err) 472 return err; 473 474 DPRINTF(("%s: read reg %#02X->%#02X, %#02X->%#02X\n", 475 device_xname(sc->sc_dev), 476 (unsigned)reg1, (unsigned)buf[0], 477 (unsigned)reg2, (unsigned)buf[1])); 478 479 if (rval1) *rval1 = buf[0]; 480 if (rval2) *rval2 = buf[1]; 481 482 return USBD_NORMAL_COMPLETION; 483 } 484 485 static __inline usbd_status 486 get_version(struct uchcom_softc *sc, uint8_t *rver) 487 { 488 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 489 usbd_status err; 490 int actin; 491 492 err = generic_control_in( 493 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 494 if (err) 495 return err; 496 497 if (rver) *rver = buf[0]; 498 499 return USBD_NORMAL_COMPLETION; 500 } 501 502 static __inline usbd_status 503 get_status(struct uchcom_softc *sc, uint8_t *rval) 504 { 505 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 506 } 507 508 static __inline usbd_status 509 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 510 { 511 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 512 } 513 514 static __inline usbd_status 515 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 516 { 517 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 518 } 519 520 521 /* ---------------------------------------------------------------------- 522 * middle layer 523 */ 524 525 static int 526 update_version(struct uchcom_softc *sc) 527 { 528 usbd_status err; 529 530 err = get_version(sc, &sc->sc_version); 531 if (err) { 532 device_printf(sc->sc_dev, "cannot get version: %s\n", 533 usbd_errstr(err)); 534 return EIO; 535 } 536 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 537 538 return 0; 539 } 540 541 static void 542 convert_status(struct uchcom_softc *sc, uint8_t cur) 543 { 544 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 545 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 546 547 cur = ~cur & 0x0F; 548 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 549 } 550 551 static int 552 update_status(struct uchcom_softc *sc) 553 { 554 usbd_status err; 555 uint8_t cur; 556 557 err = get_status(sc, &cur); 558 if (err) { 559 device_printf(sc->sc_dev, 560 "cannot update status: %s\n", usbd_errstr(err)); 561 return EIO; 562 } 563 convert_status(sc, cur); 564 565 return 0; 566 } 567 568 569 static int 570 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 571 { 572 usbd_status err; 573 uint8_t val = 0; 574 575 if (dtr) val |= UCHCOM_DTR_MASK; 576 if (rts) val |= UCHCOM_RTS_MASK; 577 578 if (sc->sc_version < UCHCOM_VER_20) 579 err = set_dtrrts_10(sc, ~val); 580 else 581 err = set_dtrrts_20(sc, ~val); 582 583 if (err) { 584 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 585 usbd_errstr(err)); 586 return EIO; 587 } 588 589 return 0; 590 } 591 592 static int 593 set_break(struct uchcom_softc *sc, int onoff) 594 { 595 usbd_status err; 596 uint8_t brk, lcr; 597 598 err = read_reg(sc, UCHCOM_REG_BREAK, &brk, UCHCOM_REG_LCR, &lcr); 599 if (err) 600 return EIO; 601 if (onoff) { 602 /* on - clear bits */ 603 brk &= ~UCHCOM_BREAK_MASK; 604 lcr &= ~UCHCOM_LCR_TXE; 605 } else { 606 /* off - set bits */ 607 brk |= UCHCOM_BREAK_MASK; 608 lcr |= UCHCOM_LCR_TXE; 609 } 610 err = write_reg(sc, UCHCOM_REG_BREAK, brk, UCHCOM_REG_LCR, lcr); 611 if (err) 612 return EIO; 613 614 return 0; 615 } 616 617 static int 618 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 619 { 620 size_t i; 621 uint32_t best, div, pre; 622 const uint32_t rate4x = rate * 4U; 623 624 if (rate == 0 || rate > 3000000) 625 return -1; 626 627 pre = __arraycount(rates4x); 628 best = UINT32_MAX; 629 630 for (i = 0; i < __arraycount(rates4x); i++) { 631 uint32_t score, try; 632 try = rates4x[i] * 2 / rate4x; 633 try = (try / 2) + (try & 1); 634 if (try < 2) 635 continue; 636 if (try > 255) 637 try = 255; 638 score = abs((int)rate4x - rates4x[i] / try); 639 if (score < best) { 640 best = score; 641 pre = i; 642 div = try; 643 } 644 } 645 646 if (pre >= __arraycount(rates4x)) 647 return -1; 648 if ((rates4x[pre] / div / 4) < (rate * 99 / 100)) 649 return -1; 650 if ((rates4x[pre] / div / 4) > (rate * 101 / 100)) 651 return -1; 652 653 dp->dv_prescaler = pre; 654 dp->dv_div = (uint8_t)-div; 655 656 return 0; 657 } 658 659 static int 660 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 661 { 662 usbd_status err; 663 struct uchcom_divider dv; 664 665 if (calc_divider_settings(&dv, rate)) 666 return EINVAL; 667 668 if ((err = write_reg(sc, 669 UCHCOM_REG_BPS_PRE, 670 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 671 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 672 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 673 usbd_errstr(err)); 674 return EIO; 675 } 676 677 return 0; 678 } 679 680 static int 681 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 682 { 683 usbd_status err; 684 uint8_t lcr = 0, lcr2 = 0; 685 686 err = read_reg(sc, UCHCOM_REG_LCR, &lcr, UCHCOM_REG_LCR2, &lcr2); 687 if (err) { 688 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 689 usbd_errstr(err)); 690 return EIO; 691 } 692 693 lcr = UCHCOM_LCR_RXE | UCHCOM_LCR_TXE; 694 695 switch (ISSET(cflag, CSIZE)) { 696 case CS5: 697 lcr |= UCHCOM_LCR_CS5; 698 break; 699 case CS6: 700 lcr |= UCHCOM_LCR_CS6; 701 break; 702 case CS7: 703 lcr |= UCHCOM_LCR_CS7; 704 break; 705 case CS8: 706 lcr |= UCHCOM_LCR_CS8; 707 break; 708 } 709 710 if (ISSET(cflag, PARENB)) { 711 lcr |= UCHCOM_LCR_PARENB; 712 if (!ISSET(cflag, PARODD)) 713 lcr |= UCHCOM_LCR_PAREVEN; 714 } 715 716 if (ISSET(cflag, CSTOPB)) { 717 lcr |= UCHCOM_LCR_STOPB; 718 } 719 720 err = write_reg(sc, UCHCOM_REG_LCR, lcr, UCHCOM_REG_LCR2, lcr2); 721 if (err) { 722 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 723 usbd_errstr(err)); 724 return EIO; 725 } 726 727 return 0; 728 } 729 730 static int 731 clear_chip(struct uchcom_softc *sc) 732 { 733 usbd_status err; 734 735 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 736 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 737 if (err) { 738 device_printf(sc->sc_dev, "cannot clear: %s\n", 739 usbd_errstr(err)); 740 return EIO; 741 } 742 743 return 0; 744 } 745 746 static int 747 reset_chip(struct uchcom_softc *sc) 748 { 749 usbd_status err; 750 751 err = generic_control_out(sc, UCHCOM_REQ_RESET, 752 UCHCOM_RESET_VALUE, UCHCOM_RESET_INDEX); 753 if (err) 754 goto failed; 755 756 return 0; 757 758 failed: 759 printf("%s: cannot reset: %s\n", 760 device_xname(sc->sc_dev), usbd_errstr(err)); 761 return EIO; 762 } 763 764 static int 765 setup_comm(struct uchcom_softc *sc) 766 { 767 int ret; 768 769 ret = update_version(sc); 770 if (ret) 771 return ret; 772 773 ret = clear_chip(sc); 774 if (ret) 775 return ret; 776 777 ret = set_dte_rate(sc, TTYDEF_SPEED); 778 if (ret) 779 return ret; 780 781 ret = set_line_control(sc, CS8); 782 if (ret) 783 return ret; 784 785 ret = update_status(sc); 786 if (ret) 787 return ret; 788 789 ret = reset_chip(sc); 790 if (ret) 791 return ret; 792 793 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 794 if (ret) 795 return ret; 796 797 sc->sc_dtr = sc->sc_rts = 1; 798 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 799 if (ret) 800 return ret; 801 802 return 0; 803 } 804 805 static int 806 setup_intr_pipe(struct uchcom_softc *sc) 807 { 808 usbd_status err; 809 810 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 811 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 812 err = usbd_open_pipe_intr(sc->sc_iface, 813 sc->sc_intr_endpoint, 814 USBD_SHORT_XFER_OK, 815 &sc->sc_intr_pipe, sc, 816 sc->sc_intr_buf, 817 sc->sc_intr_size, 818 uchcom_intr, USBD_DEFAULT_INTERVAL); 819 if (err) { 820 device_printf(sc->sc_dev, 821 "cannot open interrupt pipe: %s\n", 822 usbd_errstr(err)); 823 return EIO; 824 } 825 } 826 return 0; 827 } 828 829 static void 830 close_intr_pipe(struct uchcom_softc *sc) 831 { 832 833 if (sc->sc_intr_pipe != NULL) { 834 usbd_abort_pipe(sc->sc_intr_pipe); 835 usbd_close_pipe(sc->sc_intr_pipe); 836 sc->sc_intr_pipe = NULL; 837 } 838 if (sc->sc_intr_buf != NULL) { 839 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 840 sc->sc_intr_buf = NULL; 841 } 842 } 843 844 845 /* ---------------------------------------------------------------------- 846 * methods for ucom 847 */ 848 static void 849 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 850 { 851 struct uchcom_softc *sc = arg; 852 853 if (sc->sc_dying) 854 return; 855 856 *rlsr = sc->sc_lsr; 857 *rmsr = sc->sc_msr; 858 } 859 860 static void 861 uchcom_set(void *arg, int portno, int reg, int onoff) 862 { 863 struct uchcom_softc *sc = arg; 864 865 if (sc->sc_dying) 866 return; 867 868 switch (reg) { 869 case UCOM_SET_DTR: 870 sc->sc_dtr = !!onoff; 871 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 872 break; 873 case UCOM_SET_RTS: 874 sc->sc_rts = !!onoff; 875 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 876 break; 877 case UCOM_SET_BREAK: 878 set_break(sc, onoff); 879 break; 880 } 881 } 882 883 static int 884 uchcom_param(void *arg, int portno, struct termios *t) 885 { 886 struct uchcom_softc *sc = arg; 887 int ret; 888 889 if (sc->sc_dying) 890 return EIO; 891 892 ret = set_line_control(sc, t->c_cflag); 893 if (ret) 894 return ret; 895 896 ret = set_dte_rate(sc, t->c_ospeed); 897 if (ret) 898 return ret; 899 900 return 0; 901 } 902 903 static int 904 uchcom_open(void *arg, int portno) 905 { 906 int ret; 907 struct uchcom_softc *sc = arg; 908 909 if (sc->sc_dying) 910 return EIO; 911 912 ret = setup_intr_pipe(sc); 913 if (ret) 914 return ret; 915 916 ret = setup_comm(sc); 917 if (ret) 918 return ret; 919 920 return 0; 921 } 922 923 static void 924 uchcom_close(void *arg, int portno) 925 { 926 struct uchcom_softc *sc = arg; 927 928 if (sc->sc_dying) 929 return; 930 931 close_intr_pipe(sc); 932 } 933 934 935 /* ---------------------------------------------------------------------- 936 * callback when the modem status is changed. 937 */ 938 static void 939 uchcom_intr(struct usbd_xfer *xfer, void * priv, 940 usbd_status status) 941 { 942 struct uchcom_softc *sc = priv; 943 u_char *buf = sc->sc_intr_buf; 944 945 if (sc->sc_dying) 946 return; 947 948 if (status != USBD_NORMAL_COMPLETION) { 949 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 950 return; 951 952 DPRINTF(("%s: abnormal status: %s\n", 953 device_xname(sc->sc_dev), usbd_errstr(status))); 954 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 955 return; 956 } 957 DPRINTF(("%s: intr: %#02X %#02X %#02X %#02X " 958 "%#02X %#02X %#02X %#02X\n", 959 device_xname(sc->sc_dev), 960 (unsigned)buf[0], (unsigned)buf[1], 961 (unsigned)buf[2], (unsigned)buf[3], 962 (unsigned)buf[4], (unsigned)buf[5], 963 (unsigned)buf[6], (unsigned)buf[7])); 964 965 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 966 ucom_status_change(device_private(sc->sc_subdev)); 967 } 968
Indexes created Sat Oct 11 08:10:02 GMT 2025