uchcom.c revision 1.37
1 /* $NetBSD: uchcom.c,v 1.37 2021/04/24 23:36:59 thorpej 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 1.37 2021/04/24 23:36:59 thorpej 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(self, &ucaa, ucomprint, 277 CFARG_SUBMATCH, ucomsubmatch, 278 CFARG_EOL); 279 280 return; 281 282 failed: 283 sc->sc_dying = true; 284 return; 285 } 286 287 static void 288 uchcom_childdet(device_t self, device_t child) 289 { 290 struct uchcom_softc *sc = device_private(self); 291 292 KASSERT(sc->sc_subdev == child); 293 sc->sc_subdev = NULL; 294 } 295 296 static int 297 uchcom_detach(device_t self, int flags) 298 { 299 struct uchcom_softc *sc = device_private(self); 300 int rv = 0; 301 302 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 303 304 close_intr_pipe(sc); 305 306 sc->sc_dying = true; 307 308 if (sc->sc_subdev != NULL) { 309 rv = config_detach(sc->sc_subdev, flags); 310 sc->sc_subdev = NULL; 311 } 312 313 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 314 315 return rv; 316 } 317 318 static int 319 set_config(struct uchcom_softc *sc) 320 { 321 usbd_status err; 322 323 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 324 if (err) { 325 aprint_error_dev(sc->sc_dev, 326 "failed to set configuration: %s\n", usbd_errstr(err)); 327 return -1; 328 } 329 330 return 0; 331 } 332 333 static int 334 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 335 { 336 usbd_status err; 337 338 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 339 riface); 340 if (err) { 341 aprint_error("\n%s: failed to get interface: %s\n", 342 device_xname(sc->sc_dev), usbd_errstr(err)); 343 return -1; 344 } 345 346 return 0; 347 } 348 349 static int 350 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 351 { 352 int i, bin=-1, bout=-1, intr=-1, isize=0; 353 usb_interface_descriptor_t *id; 354 usb_endpoint_descriptor_t *ed; 355 356 id = usbd_get_interface_descriptor(sc->sc_iface); 357 358 for (i = 0; i < id->bNumEndpoints; i++) { 359 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 360 if (ed == NULL) { 361 aprint_error_dev(sc->sc_dev, 362 "no endpoint descriptor for %d\n", i); 363 return -1; 364 } 365 366 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 367 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 368 intr = ed->bEndpointAddress; 369 isize = UGETW(ed->wMaxPacketSize); 370 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 371 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 372 bin = ed->bEndpointAddress; 373 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 374 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 375 bout = ed->bEndpointAddress; 376 } 377 } 378 379 if (intr == -1 || bin == -1 || bout == -1) { 380 if (intr == -1) { 381 aprint_error_dev(sc->sc_dev, 382 "no interrupt end point\n"); 383 } 384 if (bin == -1) { 385 aprint_error_dev(sc->sc_dev, 386 "no data bulk in end point\n"); 387 } 388 if (bout == -1) { 389 aprint_error_dev(sc->sc_dev, 390 "no data bulk out end point\n"); 391 } 392 return -1; 393 } 394 if (isize < UCHCOM_INTR_LEAST) { 395 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 396 return -1; 397 } 398 399 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 400 device_xname(sc->sc_dev), bin, bout, intr, isize)); 401 402 endpoints->ep_intr = intr; 403 endpoints->ep_intr_size = isize; 404 endpoints->ep_bulkin = bin; 405 endpoints->ep_bulkout = bout; 406 407 return 0; 408 } 409 410 411 /* ---------------------------------------------------------------------- 412 * low level i/o 413 */ 414 415 static __inline usbd_status 416 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 417 uint16_t value, uint16_t index) 418 { 419 usb_device_request_t req; 420 421 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 422 req.bRequest = reqno; 423 USETW(req.wValue, value); 424 USETW(req.wIndex, index); 425 USETW(req.wLength, 0); 426 427 return usbd_do_request(sc->sc_udev, &req, 0); 428 } 429 430 static __inline usbd_status 431 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 432 uint16_t value, uint16_t index, void *buf, int buflen, 433 int *actlen) 434 { 435 usb_device_request_t req; 436 437 req.bmRequestType = UT_READ_VENDOR_DEVICE; 438 req.bRequest = reqno; 439 USETW(req.wValue, value); 440 USETW(req.wIndex, index); 441 USETW(req.wLength, (uint16_t)buflen); 442 443 return usbd_do_request_flags(sc->sc_udev, &req, buf, 444 USBD_SHORT_XFER_OK, actlen, 445 USBD_DEFAULT_TIMEOUT); 446 } 447 448 static __inline usbd_status 449 write_reg(struct uchcom_softc *sc, 450 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 451 { 452 DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 453 device_xname(sc->sc_dev), 454 (unsigned)reg1, (unsigned)val1, 455 (unsigned)reg2, (unsigned)val2)); 456 return generic_control_out( 457 sc, UCHCOM_REQ_WRITE_REG, 458 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 459 } 460 461 static __inline usbd_status 462 read_reg(struct uchcom_softc *sc, 463 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 464 { 465 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 466 usbd_status err; 467 int actin; 468 469 err = generic_control_in( 470 sc, UCHCOM_REQ_READ_REG, 471 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 472 if (err) 473 return err; 474 475 DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 476 device_xname(sc->sc_dev), 477 (unsigned)reg1, (unsigned)buf[0], 478 (unsigned)reg2, (unsigned)buf[1])); 479 480 if (rval1) *rval1 = buf[0]; 481 if (rval2) *rval2 = buf[1]; 482 483 return USBD_NORMAL_COMPLETION; 484 } 485 486 static __inline usbd_status 487 get_version(struct uchcom_softc *sc, uint8_t *rver) 488 { 489 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 490 usbd_status err; 491 int actin; 492 493 err = generic_control_in( 494 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 495 if (err) 496 return err; 497 498 if (rver) *rver = buf[0]; 499 500 return USBD_NORMAL_COMPLETION; 501 } 502 503 static __inline usbd_status 504 get_status(struct uchcom_softc *sc, uint8_t *rval) 505 { 506 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 507 } 508 509 static __inline usbd_status 510 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 511 { 512 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 513 } 514 515 static __inline usbd_status 516 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 517 { 518 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 519 } 520 521 522 /* ---------------------------------------------------------------------- 523 * middle layer 524 */ 525 526 static int 527 update_version(struct uchcom_softc *sc) 528 { 529 usbd_status err; 530 531 err = get_version(sc, &sc->sc_version); 532 if (err) { 533 device_printf(sc->sc_dev, "cannot get version: %s\n", 534 usbd_errstr(err)); 535 return EIO; 536 } 537 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 538 539 return 0; 540 } 541 542 static void 543 convert_status(struct uchcom_softc *sc, uint8_t cur) 544 { 545 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 546 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 547 548 cur = ~cur & 0x0F; 549 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 550 } 551 552 static int 553 update_status(struct uchcom_softc *sc) 554 { 555 usbd_status err; 556 uint8_t cur; 557 558 err = get_status(sc, &cur); 559 if (err) { 560 device_printf(sc->sc_dev, 561 "cannot update status: %s\n", usbd_errstr(err)); 562 return EIO; 563 } 564 convert_status(sc, cur); 565 566 return 0; 567 } 568 569 570 static int 571 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 572 { 573 usbd_status err; 574 uint8_t val = 0; 575 576 if (dtr) val |= UCHCOM_DTR_MASK; 577 if (rts) val |= UCHCOM_RTS_MASK; 578 579 if (sc->sc_version < UCHCOM_VER_20) 580 err = set_dtrrts_10(sc, ~val); 581 else 582 err = set_dtrrts_20(sc, ~val); 583 584 if (err) { 585 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 586 usbd_errstr(err)); 587 return EIO; 588 } 589 590 return 0; 591 } 592 593 static int 594 set_break(struct uchcom_softc *sc, int onoff) 595 { 596 usbd_status err; 597 uint8_t brk, lcr; 598 599 err = read_reg(sc, UCHCOM_REG_BREAK, &brk, UCHCOM_REG_LCR, &lcr); 600 if (err) 601 return EIO; 602 if (onoff) { 603 /* on - clear bits */ 604 brk &= ~UCHCOM_BREAK_MASK; 605 lcr &= ~UCHCOM_LCR_TXE; 606 } else { 607 /* off - set bits */ 608 brk |= UCHCOM_BREAK_MASK; 609 lcr |= UCHCOM_LCR_TXE; 610 } 611 err = write_reg(sc, UCHCOM_REG_BREAK, brk, UCHCOM_REG_LCR, lcr); 612 if (err) 613 return EIO; 614 615 return 0; 616 } 617 618 static int 619 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 620 { 621 size_t i; 622 uint32_t best, div, pre; 623 const uint32_t rate4x = rate * 4U; 624 625 if (rate == 0 || rate > 3000000) 626 return -1; 627 628 pre = __arraycount(rates4x); 629 best = UINT32_MAX; 630 631 for (i = 0; i < __arraycount(rates4x); i++) { 632 uint32_t score, try; 633 try = rates4x[i] * 2 / rate4x; 634 try = (try / 2) + (try & 1); 635 if (try < 2) 636 continue; 637 if (try > 255) 638 try = 255; 639 score = abs((int)rate4x - rates4x[i] / try); 640 if (score < best) { 641 best = score; 642 pre = i; 643 div = try; 644 } 645 } 646 647 if (pre >= __arraycount(rates4x)) 648 return -1; 649 if ((rates4x[pre] / div / 4) < (rate * 99 / 100)) 650 return -1; 651 if ((rates4x[pre] / div / 4) > (rate * 101 / 100)) 652 return -1; 653 654 dp->dv_prescaler = pre; 655 dp->dv_div = (uint8_t)-div; 656 657 return 0; 658 } 659 660 static int 661 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 662 { 663 usbd_status err; 664 struct uchcom_divider dv; 665 666 if (calc_divider_settings(&dv, rate)) 667 return EINVAL; 668 669 if ((err = write_reg(sc, 670 UCHCOM_REG_BPS_PRE, 671 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 672 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 673 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 674 usbd_errstr(err)); 675 return EIO; 676 } 677 678 return 0; 679 } 680 681 static int 682 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 683 { 684 usbd_status err; 685 uint8_t lcr = 0, lcr2 = 0; 686 687 err = read_reg(sc, UCHCOM_REG_LCR, &lcr, UCHCOM_REG_LCR2, &lcr2); 688 if (err) { 689 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 690 usbd_errstr(err)); 691 return EIO; 692 } 693 694 lcr = UCHCOM_LCR_RXE | UCHCOM_LCR_TXE; 695 696 switch (ISSET(cflag, CSIZE)) { 697 case CS5: 698 lcr |= UCHCOM_LCR_CS5; 699 break; 700 case CS6: 701 lcr |= UCHCOM_LCR_CS6; 702 break; 703 case CS7: 704 lcr |= UCHCOM_LCR_CS7; 705 break; 706 case CS8: 707 lcr |= UCHCOM_LCR_CS8; 708 break; 709 } 710 711 if (ISSET(cflag, PARENB)) { 712 lcr |= UCHCOM_LCR_PARENB; 713 if (!ISSET(cflag, PARODD)) 714 lcr |= UCHCOM_LCR_PAREVEN; 715 } 716 717 if (ISSET(cflag, CSTOPB)) { 718 lcr |= UCHCOM_LCR_STOPB; 719 } 720 721 err = write_reg(sc, UCHCOM_REG_LCR, lcr, UCHCOM_REG_LCR2, lcr2); 722 if (err) { 723 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 724 usbd_errstr(err)); 725 return EIO; 726 } 727 728 return 0; 729 } 730 731 static int 732 clear_chip(struct uchcom_softc *sc) 733 { 734 usbd_status err; 735 736 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 737 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 738 if (err) { 739 device_printf(sc->sc_dev, "cannot clear: %s\n", 740 usbd_errstr(err)); 741 return EIO; 742 } 743 744 return 0; 745 } 746 747 static int 748 reset_chip(struct uchcom_softc *sc) 749 { 750 usbd_status err; 751 752 err = generic_control_out(sc, UCHCOM_REQ_RESET, 753 UCHCOM_RESET_VALUE, UCHCOM_RESET_INDEX); 754 if (err) 755 goto failed; 756 757 return 0; 758 759 failed: 760 printf("%s: cannot reset: %s\n", 761 device_xname(sc->sc_dev), usbd_errstr(err)); 762 return EIO; 763 } 764 765 static int 766 setup_comm(struct uchcom_softc *sc) 767 { 768 int ret; 769 770 ret = update_version(sc); 771 if (ret) 772 return ret; 773 774 ret = clear_chip(sc); 775 if (ret) 776 return ret; 777 778 ret = set_dte_rate(sc, TTYDEF_SPEED); 779 if (ret) 780 return ret; 781 782 ret = set_line_control(sc, CS8); 783 if (ret) 784 return ret; 785 786 ret = update_status(sc); 787 if (ret) 788 return ret; 789 790 ret = reset_chip(sc); 791 if (ret) 792 return ret; 793 794 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 795 if (ret) 796 return ret; 797 798 sc->sc_dtr = sc->sc_rts = 1; 799 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 800 if (ret) 801 return ret; 802 803 return 0; 804 } 805 806 static int 807 setup_intr_pipe(struct uchcom_softc *sc) 808 { 809 usbd_status err; 810 811 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 812 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 813 err = usbd_open_pipe_intr(sc->sc_iface, 814 sc->sc_intr_endpoint, 815 USBD_SHORT_XFER_OK, 816 &sc->sc_intr_pipe, sc, 817 sc->sc_intr_buf, 818 sc->sc_intr_size, 819 uchcom_intr, USBD_DEFAULT_INTERVAL); 820 if (err) { 821 device_printf(sc->sc_dev, 822 "cannot open interrupt pipe: %s\n", 823 usbd_errstr(err)); 824 return EIO; 825 } 826 } 827 return 0; 828 } 829 830 static void 831 close_intr_pipe(struct uchcom_softc *sc) 832 { 833 834 if (sc->sc_intr_pipe != NULL) { 835 usbd_abort_pipe(sc->sc_intr_pipe); 836 usbd_close_pipe(sc->sc_intr_pipe); 837 sc->sc_intr_pipe = NULL; 838 } 839 if (sc->sc_intr_buf != NULL) { 840 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 841 sc->sc_intr_buf = NULL; 842 } 843 } 844 845 846 /* ---------------------------------------------------------------------- 847 * methods for ucom 848 */ 849 static void 850 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 851 { 852 struct uchcom_softc *sc = arg; 853 854 if (sc->sc_dying) 855 return; 856 857 *rlsr = sc->sc_lsr; 858 *rmsr = sc->sc_msr; 859 } 860 861 static void 862 uchcom_set(void *arg, int portno, int reg, int onoff) 863 { 864 struct uchcom_softc *sc = arg; 865 866 if (sc->sc_dying) 867 return; 868 869 switch (reg) { 870 case UCOM_SET_DTR: 871 sc->sc_dtr = !!onoff; 872 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 873 break; 874 case UCOM_SET_RTS: 875 sc->sc_rts = !!onoff; 876 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 877 break; 878 case UCOM_SET_BREAK: 879 set_break(sc, onoff); 880 break; 881 } 882 } 883 884 static int 885 uchcom_param(void *arg, int portno, struct termios *t) 886 { 887 struct uchcom_softc *sc = arg; 888 int ret; 889 890 if (sc->sc_dying) 891 return EIO; 892 893 ret = set_line_control(sc, t->c_cflag); 894 if (ret) 895 return ret; 896 897 ret = set_dte_rate(sc, t->c_ospeed); 898 if (ret) 899 return ret; 900 901 return 0; 902 } 903 904 static int 905 uchcom_open(void *arg, int portno) 906 { 907 int ret; 908 struct uchcom_softc *sc = arg; 909 910 if (sc->sc_dying) 911 return EIO; 912 913 ret = setup_intr_pipe(sc); 914 if (ret) 915 return ret; 916 917 ret = setup_comm(sc); 918 if (ret) 919 return ret; 920 921 return 0; 922 } 923 924 static void 925 uchcom_close(void *arg, int portno) 926 { 927 struct uchcom_softc *sc = arg; 928 929 if (sc->sc_dying) 930 return; 931 932 close_intr_pipe(sc); 933 } 934 935 936 /* ---------------------------------------------------------------------- 937 * callback when the modem status is changed. 938 */ 939 static void 940 uchcom_intr(struct usbd_xfer *xfer, void * priv, 941 usbd_status status) 942 { 943 struct uchcom_softc *sc = priv; 944 u_char *buf = sc->sc_intr_buf; 945 946 if (sc->sc_dying) 947 return; 948 949 if (status != USBD_NORMAL_COMPLETION) { 950 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 951 return; 952 953 DPRINTF(("%s: abnormal status: %s\n", 954 device_xname(sc->sc_dev), usbd_errstr(status))); 955 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 956 return; 957 } 958 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 959 "0x%02X 0x%02X 0x%02X 0x%02X\n", 960 device_xname(sc->sc_dev), 961 (unsigned)buf[0], (unsigned)buf[1], 962 (unsigned)buf[2], (unsigned)buf[3], 963 (unsigned)buf[4], (unsigned)buf[5], 964 (unsigned)buf[6], (unsigned)buf[7])); 965 966 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 967 ucom_status_change(device_private(sc->sc_subdev)); 968 } 969
Indexes created Wed Sep 24 15:09:51 GMT 2025