uchcom.c revision 1.28
1 /* $NetBSD: uchcom.c,v 1.28 2019/01/31 18:21:21 jakllsch 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 1.28 2019/01/31 18:21:21 jakllsch 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 int 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 struct ucom_methods uchcom_methods = { 189 .ucom_get_status = uchcom_get_status, 190 .ucom_set = uchcom_set, 191 .ucom_param = uchcom_param, 192 .ucom_ioctl = NULL, 193 .ucom_open = uchcom_open, 194 .ucom_close = uchcom_close, 195 .ucom_read = NULL, 196 .ucom_write = NULL, 197 }; 198 199 int uchcom_match(device_t, cfdata_t, void *); 200 void uchcom_attach(device_t, device_t, void *); 201 void uchcom_childdet(device_t, device_t); 202 int uchcom_detach(device_t, int); 203 int uchcom_activate(device_t, enum devact); 204 205 extern struct cfdriver uchcom_cd; 206 207 CFATTACH_DECL2_NEW(uchcom, 208 sizeof(struct uchcom_softc), 209 uchcom_match, 210 uchcom_attach, 211 uchcom_detach, 212 uchcom_activate, 213 NULL, 214 uchcom_childdet); 215 216 /* ---------------------------------------------------------------------- 217 * driver entry points 218 */ 219 220 int 221 uchcom_match(device_t parent, cfdata_t match, void *aux) 222 { 223 struct usb_attach_arg *uaa = aux; 224 225 return (uchcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 226 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 227 } 228 229 void 230 uchcom_attach(device_t parent, device_t self, void *aux) 231 { 232 struct uchcom_softc *sc = device_private(self); 233 struct usb_attach_arg *uaa = aux; 234 struct usbd_device *dev = uaa->uaa_device; 235 char *devinfop; 236 struct uchcom_endpoints endpoints; 237 struct ucom_attach_args ucaa; 238 239 aprint_naive("\n"); 240 aprint_normal("\n"); 241 242 devinfop = usbd_devinfo_alloc(dev, 0); 243 aprint_normal_dev(self, "%s\n", devinfop); 244 usbd_devinfo_free(devinfop); 245 246 sc->sc_dev = self; 247 sc->sc_udev = dev; 248 sc->sc_dying = 0; 249 sc->sc_dtr = sc->sc_rts = -1; 250 sc->sc_lsr = sc->sc_msr = 0; 251 252 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 253 254 if (set_config(sc)) 255 goto failed; 256 257 if (find_ifaces(sc, &sc->sc_iface)) 258 goto failed; 259 260 if (find_endpoints(sc, &endpoints)) 261 goto failed; 262 263 sc->sc_intr_endpoint = endpoints.ep_intr; 264 sc->sc_intr_size = endpoints.ep_intr_size; 265 266 /* setup ucom layer */ 267 ucaa.ucaa_portno = UCOM_UNK_PORTNO; 268 ucaa.ucaa_bulkin = endpoints.ep_bulkin; 269 ucaa.ucaa_bulkout = endpoints.ep_bulkout; 270 ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; 271 ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; 272 ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; 273 ucaa.ucaa_opkthdrlen = 0; 274 ucaa.ucaa_device = dev; 275 ucaa.ucaa_iface = sc->sc_iface; 276 ucaa.ucaa_methods = &uchcom_methods; 277 ucaa.ucaa_arg = sc; 278 ucaa.ucaa_info = NULL; 279 280 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 281 282 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa, 283 ucomprint, ucomsubmatch); 284 285 return; 286 287 failed: 288 sc->sc_dying = 1; 289 return; 290 } 291 292 void 293 uchcom_childdet(device_t self, device_t child) 294 { 295 struct uchcom_softc *sc = device_private(self); 296 297 KASSERT(sc->sc_subdev == child); 298 sc->sc_subdev = NULL; 299 } 300 301 int 302 uchcom_detach(device_t self, int flags) 303 { 304 struct uchcom_softc *sc = device_private(self); 305 int rv = 0; 306 307 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 308 309 close_intr_pipe(sc); 310 311 sc->sc_dying = 1; 312 313 if (sc->sc_subdev != NULL) 314 rv = config_detach(sc->sc_subdev, flags); 315 316 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 317 318 return rv; 319 } 320 321 int 322 uchcom_activate(device_t self, enum devact act) 323 { 324 struct uchcom_softc *sc = device_private(self); 325 326 switch (act) { 327 case DVACT_DEACTIVATE: 328 close_intr_pipe(sc); 329 sc->sc_dying = 1; 330 return 0; 331 default: 332 return EOPNOTSUPP; 333 } 334 } 335 336 static int 337 set_config(struct uchcom_softc *sc) 338 { 339 usbd_status err; 340 341 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 342 if (err) { 343 aprint_error_dev(sc->sc_dev, 344 "failed to set configuration: %s\n", usbd_errstr(err)); 345 return -1; 346 } 347 348 return 0; 349 } 350 351 static int 352 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 353 { 354 usbd_status err; 355 356 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 357 riface); 358 if (err) { 359 aprint_error("\n%s: failed to get interface: %s\n", 360 device_xname(sc->sc_dev), usbd_errstr(err)); 361 return -1; 362 } 363 364 return 0; 365 } 366 367 static int 368 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 369 { 370 int i, bin=-1, bout=-1, intr=-1, isize=0; 371 usb_interface_descriptor_t *id; 372 usb_endpoint_descriptor_t *ed; 373 374 id = usbd_get_interface_descriptor(sc->sc_iface); 375 376 for (i = 0; i < id->bNumEndpoints; i++) { 377 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 378 if (ed == NULL) { 379 aprint_error_dev(sc->sc_dev, 380 "no endpoint descriptor for %d\n", i); 381 return -1; 382 } 383 384 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 385 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 386 intr = ed->bEndpointAddress; 387 isize = UGETW(ed->wMaxPacketSize); 388 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 389 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 390 bin = ed->bEndpointAddress; 391 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 392 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 393 bout = ed->bEndpointAddress; 394 } 395 } 396 397 if (intr == -1 || bin == -1 || bout == -1) { 398 if (intr == -1) { 399 aprint_error_dev(sc->sc_dev, 400 "no interrupt end point\n"); 401 } 402 if (bin == -1) { 403 aprint_error_dev(sc->sc_dev, 404 "no data bulk in end point\n"); 405 } 406 if (bout == -1) { 407 aprint_error_dev(sc->sc_dev, 408 "no data bulk out end point\n"); 409 } 410 return -1; 411 } 412 if (isize < UCHCOM_INTR_LEAST) { 413 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 414 return -1; 415 } 416 417 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 418 device_xname(sc->sc_dev), bin, bout, intr, isize)); 419 420 endpoints->ep_intr = intr; 421 endpoints->ep_intr_size = isize; 422 endpoints->ep_bulkin = bin; 423 endpoints->ep_bulkout = bout; 424 425 return 0; 426 } 427 428 429 /* ---------------------------------------------------------------------- 430 * low level i/o 431 */ 432 433 static __inline usbd_status 434 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 435 uint16_t value, uint16_t index) 436 { 437 usb_device_request_t req; 438 439 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 440 req.bRequest = reqno; 441 USETW(req.wValue, value); 442 USETW(req.wIndex, index); 443 USETW(req.wLength, 0); 444 445 return usbd_do_request(sc->sc_udev, &req, 0); 446 } 447 448 static __inline usbd_status 449 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 450 uint16_t value, uint16_t index, void *buf, int buflen, 451 int *actlen) 452 { 453 usb_device_request_t req; 454 455 req.bmRequestType = UT_READ_VENDOR_DEVICE; 456 req.bRequest = reqno; 457 USETW(req.wValue, value); 458 USETW(req.wIndex, index); 459 USETW(req.wLength, (uint16_t)buflen); 460 461 return usbd_do_request_flags(sc->sc_udev, &req, buf, 462 USBD_SHORT_XFER_OK, actlen, 463 USBD_DEFAULT_TIMEOUT); 464 } 465 466 static __inline usbd_status 467 write_reg(struct uchcom_softc *sc, 468 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 469 { 470 DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 471 device_xname(sc->sc_dev), 472 (unsigned)reg1, (unsigned)val1, 473 (unsigned)reg2, (unsigned)val2)); 474 return generic_control_out( 475 sc, UCHCOM_REQ_WRITE_REG, 476 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 477 } 478 479 static __inline usbd_status 480 read_reg(struct uchcom_softc *sc, 481 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 482 { 483 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 484 usbd_status err; 485 int actin; 486 487 err = generic_control_in( 488 sc, UCHCOM_REQ_READ_REG, 489 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 490 if (err) 491 return err; 492 493 DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 494 device_xname(sc->sc_dev), 495 (unsigned)reg1, (unsigned)buf[0], 496 (unsigned)reg2, (unsigned)buf[1])); 497 498 if (rval1) *rval1 = buf[0]; 499 if (rval2) *rval2 = buf[1]; 500 501 return USBD_NORMAL_COMPLETION; 502 } 503 504 static __inline usbd_status 505 get_version(struct uchcom_softc *sc, uint8_t *rver) 506 { 507 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 508 usbd_status err; 509 int actin; 510 511 err = generic_control_in( 512 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 513 if (err) 514 return err; 515 516 if (rver) *rver = buf[0]; 517 518 return USBD_NORMAL_COMPLETION; 519 } 520 521 static __inline usbd_status 522 get_status(struct uchcom_softc *sc, uint8_t *rval) 523 { 524 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 525 } 526 527 static __inline usbd_status 528 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 529 { 530 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 531 } 532 533 static __inline usbd_status 534 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 535 { 536 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 537 } 538 539 540 /* ---------------------------------------------------------------------- 541 * middle layer 542 */ 543 544 static int 545 update_version(struct uchcom_softc *sc) 546 { 547 usbd_status err; 548 549 err = get_version(sc, &sc->sc_version); 550 if (err) { 551 device_printf(sc->sc_dev, "cannot get version: %s\n", 552 usbd_errstr(err)); 553 return EIO; 554 } 555 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 556 557 return 0; 558 } 559 560 static void 561 convert_status(struct uchcom_softc *sc, uint8_t cur) 562 { 563 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 564 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 565 566 cur = ~cur & 0x0F; 567 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 568 } 569 570 static int 571 update_status(struct uchcom_softc *sc) 572 { 573 usbd_status err; 574 uint8_t cur; 575 576 err = get_status(sc, &cur); 577 if (err) { 578 device_printf(sc->sc_dev, 579 "cannot update status: %s\n", usbd_errstr(err)); 580 return EIO; 581 } 582 convert_status(sc, cur); 583 584 return 0; 585 } 586 587 588 static int 589 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 590 { 591 usbd_status err; 592 uint8_t val = 0; 593 594 if (dtr) val |= UCHCOM_DTR_MASK; 595 if (rts) val |= UCHCOM_RTS_MASK; 596 597 if (sc->sc_version < UCHCOM_VER_20) 598 err = set_dtrrts_10(sc, ~val); 599 else 600 err = set_dtrrts_20(sc, ~val); 601 602 if (err) { 603 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 604 usbd_errstr(err)); 605 return EIO; 606 } 607 608 return 0; 609 } 610 611 static int 612 set_break(struct uchcom_softc *sc, int onoff) 613 { 614 usbd_status err; 615 uint8_t brk, lcr; 616 617 err = read_reg(sc, UCHCOM_REG_BREAK, &brk, UCHCOM_REG_LCR, &lcr); 618 if (err) 619 return EIO; 620 if (onoff) { 621 /* on - clear bits */ 622 brk &= ~UCHCOM_BREAK_MASK; 623 lcr &= ~UCHCOM_LCR_TXE; 624 } else { 625 /* off - set bits */ 626 brk |= UCHCOM_BREAK_MASK; 627 lcr |= UCHCOM_LCR_TXE; 628 } 629 err = write_reg(sc, UCHCOM_REG_BREAK, brk, UCHCOM_REG_LCR, lcr); 630 if (err) 631 return EIO; 632 633 return 0; 634 } 635 636 static int 637 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 638 { 639 size_t i; 640 uint32_t best, div, pre; 641 const uint32_t rate4x = rate * 4U; 642 643 if (rate == 0 || rate > 3000000) 644 return -1; 645 646 pre = __arraycount(rates4x); 647 best = UINT32_MAX; 648 649 for (i = 0; i < __arraycount(rates4x); i++) { 650 uint32_t score, try; 651 try = rates4x[i] * 2 / rate4x; 652 try = (try / 2) + (try & 1); 653 if (try < 2) 654 continue; 655 if (try > 255) 656 try = 255; 657 score = abs((int)rate4x - rates4x[i] / try); 658 if (score < best) { 659 best = score; 660 pre = i; 661 div = try; 662 } 663 } 664 665 if (pre >= __arraycount(rates4x)) 666 return -1; 667 if ((rates4x[pre] / div / 4) < (rate * 99 / 100)) 668 return -1; 669 if ((rates4x[pre] / div / 4) > (rate * 101 / 100)) 670 return -1; 671 672 dp->dv_prescaler = pre; 673 dp->dv_div = (uint8_t)-div; 674 675 return 0; 676 } 677 678 static int 679 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 680 { 681 usbd_status err; 682 struct uchcom_divider dv; 683 684 if (calc_divider_settings(&dv, rate)) 685 return EINVAL; 686 687 if ((err = write_reg(sc, 688 UCHCOM_REG_BPS_PRE, 689 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 690 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 691 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 692 usbd_errstr(err)); 693 return EIO; 694 } 695 696 return 0; 697 } 698 699 static int 700 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 701 { 702 usbd_status err; 703 uint8_t lcr = 0, lcr2 = 0; 704 705 err = read_reg(sc, UCHCOM_REG_LCR, &lcr, UCHCOM_REG_LCR2, &lcr2); 706 if (err) { 707 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 708 usbd_errstr(err)); 709 return EIO; 710 } 711 712 lcr = UCHCOM_LCR_RXE | UCHCOM_LCR_TXE; 713 714 switch (ISSET(cflag, CSIZE)) { 715 case CS5: 716 lcr |= UCHCOM_LCR_CS5; 717 break; 718 case CS6: 719 lcr |= UCHCOM_LCR_CS6; 720 break; 721 case CS7: 722 lcr |= UCHCOM_LCR_CS7; 723 break; 724 case CS8: 725 lcr |= UCHCOM_LCR_CS8; 726 break; 727 } 728 729 if (ISSET(cflag, PARENB)) { 730 lcr |= UCHCOM_LCR_PARENB; 731 if (!ISSET(cflag, PARODD)) 732 lcr |= UCHCOM_LCR_PAREVEN; 733 } 734 735 if (ISSET(cflag, CSTOPB)) { 736 lcr |= UCHCOM_LCR_STOPB; 737 } 738 739 err = write_reg(sc, UCHCOM_REG_LCR, lcr, UCHCOM_REG_LCR2, lcr2); 740 if (err) { 741 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 742 usbd_errstr(err)); 743 return EIO; 744 } 745 746 return 0; 747 } 748 749 static int 750 clear_chip(struct uchcom_softc *sc) 751 { 752 usbd_status err; 753 754 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 755 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 756 if (err) { 757 device_printf(sc->sc_dev, "cannot clear: %s\n", 758 usbd_errstr(err)); 759 return EIO; 760 } 761 762 return 0; 763 } 764 765 static int 766 reset_chip(struct uchcom_softc *sc) 767 { 768 usbd_status err; 769 770 err = generic_control_out(sc, UCHCOM_REQ_RESET, 771 UCHCOM_RESET_VALUE, UCHCOM_RESET_INDEX); 772 if (err) 773 goto failed; 774 775 return 0; 776 777 failed: 778 printf("%s: cannot reset: %s\n", 779 device_xname(sc->sc_dev), usbd_errstr(err)); 780 return EIO; 781 } 782 783 static int 784 setup_comm(struct uchcom_softc *sc) 785 { 786 int ret; 787 788 ret = update_version(sc); 789 if (ret) 790 return ret; 791 792 ret = clear_chip(sc); 793 if (ret) 794 return ret; 795 796 ret = set_dte_rate(sc, TTYDEF_SPEED); 797 if (ret) 798 return ret; 799 800 ret = set_line_control(sc, CS8); 801 if (ret) 802 return ret; 803 804 ret = update_status(sc); 805 if (ret) 806 return ret; 807 808 ret = reset_chip(sc); 809 if (ret) 810 return ret; 811 812 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 813 if (ret) 814 return ret; 815 816 sc->sc_dtr = sc->sc_rts = 1; 817 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 818 if (ret) 819 return ret; 820 821 return 0; 822 } 823 824 static int 825 setup_intr_pipe(struct uchcom_softc *sc) 826 { 827 usbd_status err; 828 829 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 830 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 831 err = usbd_open_pipe_intr(sc->sc_iface, 832 sc->sc_intr_endpoint, 833 USBD_SHORT_XFER_OK, 834 &sc->sc_intr_pipe, sc, 835 sc->sc_intr_buf, 836 sc->sc_intr_size, 837 uchcom_intr, USBD_DEFAULT_INTERVAL); 838 if (err) { 839 device_printf(sc->sc_dev, 840 "cannot open interrupt pipe: %s\n", 841 usbd_errstr(err)); 842 return EIO; 843 } 844 } 845 return 0; 846 } 847 848 static void 849 close_intr_pipe(struct uchcom_softc *sc) 850 { 851 usbd_status err; 852 853 if (sc->sc_dying) 854 return; 855 856 if (sc->sc_intr_pipe != NULL) { 857 err = usbd_abort_pipe(sc->sc_intr_pipe); 858 if (err) 859 device_printf(sc->sc_dev, 860 "abort interrupt pipe failed: %s\n", 861 usbd_errstr(err)); 862 err = usbd_close_pipe(sc->sc_intr_pipe); 863 if (err) 864 device_printf(sc->sc_dev, 865 "close interrupt pipe failed: %s\n", 866 usbd_errstr(err)); 867 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 868 sc->sc_intr_pipe = NULL; 869 } 870 } 871 872 873 /* ---------------------------------------------------------------------- 874 * methods for ucom 875 */ 876 void 877 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 878 { 879 struct uchcom_softc *sc = arg; 880 881 if (sc->sc_dying) 882 return; 883 884 *rlsr = sc->sc_lsr; 885 *rmsr = sc->sc_msr; 886 } 887 888 void 889 uchcom_set(void *arg, int portno, int reg, int onoff) 890 { 891 struct uchcom_softc *sc = arg; 892 893 if (sc->sc_dying) 894 return; 895 896 switch (reg) { 897 case UCOM_SET_DTR: 898 sc->sc_dtr = !!onoff; 899 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 900 break; 901 case UCOM_SET_RTS: 902 sc->sc_rts = !!onoff; 903 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 904 break; 905 case UCOM_SET_BREAK: 906 set_break(sc, onoff); 907 break; 908 } 909 } 910 911 int 912 uchcom_param(void *arg, int portno, struct termios *t) 913 { 914 struct uchcom_softc *sc = arg; 915 int ret; 916 917 if (sc->sc_dying) 918 return 0; 919 920 ret = set_line_control(sc, t->c_cflag); 921 if (ret) 922 return ret; 923 924 ret = set_dte_rate(sc, t->c_ospeed); 925 if (ret) 926 return ret; 927 928 return 0; 929 } 930 931 int 932 uchcom_open(void *arg, int portno) 933 { 934 int ret; 935 struct uchcom_softc *sc = arg; 936 937 if (sc->sc_dying) 938 return EIO; 939 940 ret = setup_intr_pipe(sc); 941 if (ret) 942 return ret; 943 944 ret = setup_comm(sc); 945 if (ret) 946 return ret; 947 948 return 0; 949 } 950 951 void 952 uchcom_close(void *arg, int portno) 953 { 954 struct uchcom_softc *sc = arg; 955 956 if (sc->sc_dying) 957 return; 958 959 close_intr_pipe(sc); 960 } 961 962 963 /* ---------------------------------------------------------------------- 964 * callback when the modem status is changed. 965 */ 966 void 967 uchcom_intr(struct usbd_xfer *xfer, void * priv, 968 usbd_status status) 969 { 970 struct uchcom_softc *sc = priv; 971 u_char *buf = sc->sc_intr_buf; 972 973 if (sc->sc_dying) 974 return; 975 976 if (status != USBD_NORMAL_COMPLETION) { 977 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 978 return; 979 980 DPRINTF(("%s: abnormal status: %s\n", 981 device_xname(sc->sc_dev), usbd_errstr(status))); 982 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 983 return; 984 } 985 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 986 "0x%02X 0x%02X 0x%02X 0x%02X\n", 987 device_xname(sc->sc_dev), 988 (unsigned)buf[0], (unsigned)buf[1], 989 (unsigned)buf[2], (unsigned)buf[3], 990 (unsigned)buf[4], (unsigned)buf[5], 991 (unsigned)buf[6], (unsigned)buf[7])); 992 993 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 994 ucom_status_change(device_private(sc->sc_subdev)); 995 } 996
Indexes created Thu Sep 25 02:09:54 GMT 2025