uchcom.c revision 1.13.4.1
1 /* $NetBSD: uchcom.c,v 1.13.4.1 2016/12/14 19:18:58 snj 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 1.13.4.1 2016/12/14 19:18:58 snj Exp $"); 34 35 /* 36 * driver for WinChipHead CH341/340, the worst USB-serial chip in the world. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/systm.h> 41 #include <sys/kernel.h> 42 #include <sys/malloc.h> 43 #include <sys/ioctl.h> 44 #include <sys/conf.h> 45 #include <sys/tty.h> 46 #include <sys/file.h> 47 #include <sys/select.h> 48 #include <sys/proc.h> 49 #include <sys/device.h> 50 #include <sys/poll.h> 51 52 #include <dev/usb/usb.h> 53 #include <dev/usb/usbcdc.h> 54 55 #include <dev/usb/usbdi.h> 56 #include <dev/usb/usbdi_util.h> 57 #include <dev/usb/usbdevs.h> 58 #include <dev/usb/usb_quirks.h> 59 60 #include <dev/usb/ucomvar.h> 61 62 #ifdef UCHCOM_DEBUG 63 #define DPRINTFN(n, x) if (uchcomdebug > (n)) printf x 64 int uchcomdebug = 0; 65 #else 66 #define DPRINTFN(n, x) 67 #endif 68 #define DPRINTF(x) DPRINTFN(0, x) 69 70 #define UCHCOM_IFACE_INDEX 0 71 #define UCHCOM_CONFIG_INDEX 0 72 73 #define UCHCOM_REV_CH340 0x0250 74 #define UCHCOM_INPUT_BUF_SIZE 8 75 76 #define UCHCOM_REQ_GET_VERSION 0x5F 77 #define UCHCOM_REQ_READ_REG 0x95 78 #define UCHCOM_REQ_WRITE_REG 0x9A 79 #define UCHCOM_REQ_RESET 0xA1 80 #define UCHCOM_REQ_SET_DTRRTS 0xA4 81 82 #define UCHCOM_REG_STAT1 0x06 83 #define UCHCOM_REG_STAT2 0x07 84 #define UCHCOM_REG_BPS_PRE 0x12 85 #define UCHCOM_REG_BPS_DIV 0x13 86 #define UCHCOM_REG_BPS_MOD 0x14 87 #define UCHCOM_REG_BPS_PAD 0x0F 88 #define UCHCOM_REG_BREAK1 0x05 89 #define UCHCOM_REG_BREAK2 0x18 90 #define UCHCOM_REG_LCR1 0x18 91 #define UCHCOM_REG_LCR2 0x25 92 93 #define UCHCOM_VER_20 0x20 94 #define UCHCOM_VER_30 0x30 95 96 #define UCHCOM_BASE_UNKNOWN 0 97 #define UCHCOM_BPS_MOD_BASE 20000000 98 #define UCHCOM_BPS_MOD_BASE_OFS 1100 99 100 #define UCHCOM_DTR_MASK 0x20 101 #define UCHCOM_RTS_MASK 0x40 102 103 #define UCHCOM_BRK1_MASK 0x01 104 #define UCHCOM_BRK2_MASK 0x40 105 106 #define UCHCOM_LCR1_MASK 0xAF 107 #define UCHCOM_LCR2_MASK 0x07 108 #define UCHCOM_LCR1_PARENB 0x80 109 #define UCHCOM_LCR2_PAREVEN 0x07 110 #define UCHCOM_LCR2_PARODD 0x06 111 #define UCHCOM_LCR2_PARMARK 0x05 112 #define UCHCOM_LCR2_PARSPACE 0x04 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 struct uchcom_softc 122 { 123 device_t sc_dev; 124 usbd_device_handle sc_udev; 125 device_t sc_subdev; 126 usbd_interface_handle sc_iface; 127 int sc_dying; 128 /* */ 129 int sc_intr_endpoint; 130 int sc_intr_size; 131 usbd_pipe_handle sc_intr_pipe; 132 u_char *sc_intr_buf; 133 /* */ 134 uint8_t sc_version; 135 int sc_dtr; 136 int sc_rts; 137 u_char sc_lsr; 138 u_char sc_msr; 139 int sc_lcr1; 140 int sc_lcr2; 141 }; 142 143 struct uchcom_endpoints 144 { 145 int ep_bulkin; 146 int ep_bulkout; 147 int ep_intr; 148 int ep_intr_size; 149 }; 150 151 struct uchcom_divider 152 { 153 uint8_t dv_prescaler; 154 uint8_t dv_div; 155 uint8_t dv_mod; 156 }; 157 158 struct uchcom_divider_record 159 { 160 uint32_t dvr_high; 161 uint32_t dvr_low; 162 uint32_t dvr_base_clock; 163 struct uchcom_divider dvr_divider; 164 }; 165 166 static const struct uchcom_divider_record dividers[] = 167 { 168 { 307200, 307200, UCHCOM_BASE_UNKNOWN, { 7, 0xD9, 0 } }, 169 { 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3, 0 } }, 170 { 2999999, 23530, 6000000, { 3, 0, 0 } }, 171 { 23529, 2942, 750000, { 2, 0, 0 } }, 172 { 2941, 368, 93750, { 1, 0, 0 } }, 173 { 367, 1, 11719, { 0, 0, 0 } }, 174 }; 175 #define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0])) 176 177 static const struct usb_devno uchcom_devs[] = { 178 { USB_VENDOR_WINCHIPHEAD, USB_PRODUCT_WINCHIPHEAD_CH341SER }, 179 { USB_VENDOR_WINCHIPHEAD2, USB_PRODUCT_WINCHIPHEAD2_CH341 }, 180 { USB_VENDOR_WINCHIPHEAD2, USB_PRODUCT_WINCHIPHEAD2_CH341_2 }, 181 }; 182 #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) 183 184 Static void uchcom_get_status(void *, int, u_char *, u_char *); 185 Static void uchcom_set(void *, int, int, int); 186 Static int uchcom_param(void *, int, struct termios *); 187 Static int uchcom_open(void *, int); 188 Static void uchcom_close(void *, int); 189 Static void uchcom_intr(usbd_xfer_handle, usbd_private_handle, 190 usbd_status); 191 192 static int set_config(struct uchcom_softc *); 193 static int find_ifaces(struct uchcom_softc *, usbd_interface_handle *); 194 static int find_endpoints(struct uchcom_softc *, 195 struct uchcom_endpoints *); 196 static void close_intr_pipe(struct uchcom_softc *); 197 198 199 struct ucom_methods uchcom_methods = { 200 .ucom_get_status = uchcom_get_status, 201 .ucom_set = uchcom_set, 202 .ucom_param = uchcom_param, 203 .ucom_ioctl = NULL, 204 .ucom_open = uchcom_open, 205 .ucom_close = uchcom_close, 206 .ucom_read = NULL, 207 .ucom_write = NULL, 208 }; 209 210 int uchcom_match(device_t, cfdata_t, void *); 211 void uchcom_attach(device_t, device_t, void *); 212 void uchcom_childdet(device_t, device_t); 213 int uchcom_detach(device_t, int); 214 int uchcom_activate(device_t, enum devact); 215 216 extern struct cfdriver uchcom_cd; 217 218 CFATTACH_DECL2_NEW(uchcom, 219 sizeof(struct uchcom_softc), 220 uchcom_match, 221 uchcom_attach, 222 uchcom_detach, 223 uchcom_activate, 224 NULL, 225 uchcom_childdet); 226 227 /* ---------------------------------------------------------------------- 228 * driver entry points 229 */ 230 231 int 232 uchcom_match(device_t parent, cfdata_t match, void *aux) 233 { 234 struct usb_attach_arg *uaa = aux; 235 236 return (uchcom_lookup(uaa->vendor, uaa->product) != NULL ? 237 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 238 } 239 240 void 241 uchcom_attach(device_t parent, device_t self, void *aux) 242 { 243 struct uchcom_softc *sc = device_private(self); 244 struct usb_attach_arg *uaa = aux; 245 usbd_device_handle dev = uaa->device; 246 char *devinfop; 247 struct uchcom_endpoints endpoints; 248 struct ucom_attach_args uca; 249 250 aprint_naive("\n"); 251 aprint_normal("\n"); 252 253 devinfop = usbd_devinfo_alloc(dev, 0); 254 aprint_normal_dev(self, "%s\n", devinfop); 255 usbd_devinfo_free(devinfop); 256 257 sc->sc_dev = self; 258 sc->sc_udev = dev; 259 sc->sc_dying = 0; 260 sc->sc_dtr = sc->sc_rts = -1; 261 sc->sc_lsr = sc->sc_msr = 0; 262 263 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 264 265 if (set_config(sc)) 266 goto failed; 267 268 switch (uaa->release) { 269 case UCHCOM_REV_CH340: 270 aprint_normal_dev(self, "CH340 detected\n"); 271 break; 272 default: 273 aprint_normal_dev(self, "CH341 detected\n"); 274 break; 275 } 276 277 if (find_ifaces(sc, &sc->sc_iface)) 278 goto failed; 279 280 if (find_endpoints(sc, &endpoints)) 281 goto failed; 282 283 sc->sc_intr_endpoint = endpoints.ep_intr; 284 sc->sc_intr_size = endpoints.ep_intr_size; 285 286 /* setup ucom layer */ 287 uca.portno = UCOM_UNK_PORTNO; 288 uca.bulkin = endpoints.ep_bulkin; 289 uca.bulkout = endpoints.ep_bulkout; 290 uca.ibufsize = UCHCOMIBUFSIZE; 291 uca.obufsize = UCHCOMOBUFSIZE; 292 uca.ibufsizepad = UCHCOMIBUFSIZE; 293 uca.opkthdrlen = 0; 294 uca.device = dev; 295 uca.iface = sc->sc_iface; 296 uca.methods = &uchcom_methods; 297 uca.arg = sc; 298 uca.info = NULL; 299 300 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 301 sc->sc_dev); 302 303 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &uca, 304 ucomprint, ucomsubmatch); 305 306 return; 307 308 failed: 309 sc->sc_dying = 1; 310 return; 311 } 312 313 void 314 uchcom_childdet(device_t self, device_t child) 315 { 316 struct uchcom_softc *sc = device_private(self); 317 318 KASSERT(sc->sc_subdev == child); 319 sc->sc_subdev = NULL; 320 } 321 322 int 323 uchcom_detach(device_t self, int flags) 324 { 325 struct uchcom_softc *sc = device_private(self); 326 int rv = 0; 327 328 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 329 330 close_intr_pipe(sc); 331 332 sc->sc_dying = 1; 333 334 if (sc->sc_subdev != NULL) 335 rv = config_detach(sc->sc_subdev, flags); 336 337 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 338 sc->sc_dev); 339 340 return rv; 341 } 342 343 int 344 uchcom_activate(device_t self, enum devact act) 345 { 346 struct uchcom_softc *sc = device_private(self); 347 348 switch (act) { 349 case DVACT_DEACTIVATE: 350 close_intr_pipe(sc); 351 sc->sc_dying = 1; 352 return 0; 353 default: 354 return EOPNOTSUPP; 355 } 356 } 357 358 static int 359 set_config(struct uchcom_softc *sc) 360 { 361 usbd_status err; 362 363 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 364 if (err) { 365 aprint_error_dev(sc->sc_dev, 366 "failed to set configuration: %s\n", usbd_errstr(err)); 367 return -1; 368 } 369 370 return 0; 371 } 372 373 static int 374 find_ifaces(struct uchcom_softc *sc, usbd_interface_handle *riface) 375 { 376 usbd_status err; 377 378 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 379 riface); 380 if (err) { 381 aprint_error("\n%s: failed to get interface: %s\n", 382 device_xname(sc->sc_dev), usbd_errstr(err)); 383 return -1; 384 } 385 386 return 0; 387 } 388 389 static int 390 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 391 { 392 int i, bin=-1, bout=-1, intr=-1, isize=0; 393 usb_interface_descriptor_t *id; 394 usb_endpoint_descriptor_t *ed; 395 396 id = usbd_get_interface_descriptor(sc->sc_iface); 397 398 for (i = 0; i < id->bNumEndpoints; i++) { 399 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 400 if (ed == NULL) { 401 aprint_error_dev(sc->sc_dev, 402 "no endpoint descriptor for %d\n", i); 403 return -1; 404 } 405 406 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 407 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 408 intr = ed->bEndpointAddress; 409 isize = UGETW(ed->wMaxPacketSize); 410 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 411 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 412 bin = ed->bEndpointAddress; 413 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 414 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 415 bout = ed->bEndpointAddress; 416 } 417 } 418 419 if (intr == -1 || bin == -1 || bout == -1) { 420 if (intr == -1) { 421 aprint_error_dev(sc->sc_dev, 422 "no interrupt end point\n"); 423 } 424 if (bin == -1) { 425 aprint_error_dev(sc->sc_dev, 426 "no data bulk in end point\n"); 427 } 428 if (bout == -1) { 429 aprint_error_dev(sc->sc_dev, 430 "no data bulk out end point\n"); 431 } 432 return -1; 433 } 434 if (isize < UCHCOM_INTR_LEAST) { 435 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 436 return -1; 437 } 438 439 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 440 device_xname(sc->sc_dev), bin, bout, intr, isize)); 441 442 endpoints->ep_intr = intr; 443 endpoints->ep_intr_size = isize; 444 endpoints->ep_bulkin = bin; 445 endpoints->ep_bulkout = bout; 446 447 return 0; 448 } 449 450 451 /* ---------------------------------------------------------------------- 452 * low level i/o 453 */ 454 455 static __inline usbd_status 456 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 457 uint16_t value, uint16_t index) 458 { 459 usb_device_request_t req; 460 461 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 462 req.bRequest = reqno; 463 USETW(req.wValue, value); 464 USETW(req.wIndex, index); 465 USETW(req.wLength, 0); 466 467 return usbd_do_request(sc->sc_udev, &req, 0); 468 } 469 470 static __inline usbd_status 471 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 472 uint16_t value, uint16_t index, void *buf, int buflen, 473 int *actlen) 474 { 475 usb_device_request_t req; 476 477 req.bmRequestType = UT_READ_VENDOR_DEVICE; 478 req.bRequest = reqno; 479 USETW(req.wValue, value); 480 USETW(req.wIndex, index); 481 USETW(req.wLength, (uint16_t)buflen); 482 483 return usbd_do_request_flags(sc->sc_udev, &req, buf, 484 USBD_SHORT_XFER_OK, actlen, 485 USBD_DEFAULT_TIMEOUT); 486 } 487 488 static __inline usbd_status 489 write_reg(struct uchcom_softc *sc, 490 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 491 { 492 DPRINTF(("uchcom: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 493 (unsigned)reg1, (unsigned)val1, 494 (unsigned)reg2, (unsigned)val2)); 495 return generic_control_out( 496 sc, UCHCOM_REQ_WRITE_REG, 497 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 498 } 499 500 static __inline usbd_status 501 read_reg(struct uchcom_softc *sc, 502 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 503 { 504 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 505 usbd_status err; 506 int actin; 507 508 err = generic_control_in( 509 sc, UCHCOM_REQ_READ_REG, 510 reg1|((uint16_t)reg2<<8), 0, buf, sizeof buf, &actin); 511 if (err) 512 return err; 513 514 DPRINTF(("uchcom: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 515 (unsigned)reg1, (unsigned)buf[0], 516 (unsigned)reg2, (unsigned)buf[1])); 517 518 if (rval1) *rval1 = buf[0]; 519 if (rval2) *rval2 = buf[1]; 520 521 return USBD_NORMAL_COMPLETION; 522 } 523 524 static __inline usbd_status 525 get_version(struct uchcom_softc *sc, uint8_t *rver) 526 { 527 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 528 usbd_status err; 529 int actin; 530 531 err = generic_control_in( 532 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof buf, &actin); 533 if (err) 534 return err; 535 536 if (rver) *rver = buf[0]; 537 538 return USBD_NORMAL_COMPLETION; 539 } 540 541 static __inline usbd_status 542 get_status(struct uchcom_softc *sc, uint8_t *rval) 543 { 544 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 545 } 546 547 static __inline usbd_status 548 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 549 { 550 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 551 } 552 553 static __inline usbd_status 554 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 555 { 556 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 557 } 558 559 560 /* ---------------------------------------------------------------------- 561 * middle layer 562 */ 563 564 static int 565 update_version(struct uchcom_softc *sc) 566 { 567 usbd_status err; 568 569 err = get_version(sc, &sc->sc_version); 570 if (err) { 571 aprint_error_dev(sc->sc_dev, "cannot get version: %s\n", 572 usbd_errstr(err)); 573 return EIO; 574 } 575 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 576 577 return 0; 578 } 579 580 static void 581 convert_status(struct uchcom_softc *sc, uint8_t cur) 582 { 583 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 584 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 585 586 cur = ~cur & 0x0F; 587 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 588 } 589 590 static int 591 update_status(struct uchcom_softc *sc) 592 { 593 usbd_status err; 594 uint8_t cur; 595 596 err = get_status(sc, &cur); 597 if (err) { 598 aprint_error_dev(sc->sc_dev, 599 "cannot update status: %s\n", usbd_errstr(err)); 600 return EIO; 601 } 602 convert_status(sc, cur); 603 604 return 0; 605 } 606 607 608 static int 609 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 610 { 611 usbd_status err; 612 uint8_t val = 0; 613 614 if (dtr) val |= UCHCOM_DTR_MASK; 615 if (rts) val |= UCHCOM_RTS_MASK; 616 617 if (sc->sc_version < UCHCOM_VER_20) 618 err = set_dtrrts_10(sc, ~val); 619 else 620 err = set_dtrrts_20(sc, ~val); 621 622 if (err) { 623 aprint_error_dev(sc->sc_dev, "cannot set DTR/RTS: %s\n", 624 usbd_errstr(err)); 625 return EIO; 626 } 627 628 return 0; 629 } 630 631 static int 632 set_break(struct uchcom_softc *sc, int onoff) 633 { 634 usbd_status err; 635 uint8_t brk1, brk2; 636 637 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 638 if (err) 639 return EIO; 640 if (onoff) { 641 /* on - clear bits */ 642 brk1 &= ~UCHCOM_BRK1_MASK; 643 brk2 &= ~UCHCOM_BRK2_MASK; 644 } else { 645 /* off - set bits */ 646 brk1 |= UCHCOM_BRK1_MASK; 647 brk2 |= UCHCOM_BRK2_MASK; 648 } 649 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 650 if (err) 651 return EIO; 652 653 return 0; 654 } 655 656 static int 657 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 658 { 659 int i; 660 const struct uchcom_divider_record *rp; 661 uint32_t div, rem, mod; 662 663 /* find record */ 664 for (i=0; i<NUM_DIVIDERS; i++) { 665 if (dividers[i].dvr_high >= rate && 666 dividers[i].dvr_low <= rate) { 667 rp = ÷rs[i]; 668 goto found; 669 } 670 } 671 return -1; 672 673 found: 674 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 675 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 676 dp->dv_div = rp->dvr_divider.dv_div; 677 else { 678 div = rp->dvr_base_clock / rate; 679 rem = rp->dvr_base_clock % rate; 680 if (div==0 || div>=0xFF) 681 return -1; 682 if ((rem<<1) >= rate) 683 div += 1; 684 dp->dv_div = (uint8_t)-div; 685 } 686 687 mod = UCHCOM_BPS_MOD_BASE/rate + UCHCOM_BPS_MOD_BASE_OFS; 688 mod = mod + mod/2; 689 690 dp->dv_mod = mod / 0x100; 691 692 return 0; 693 } 694 695 static int 696 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 697 { 698 usbd_status err; 699 struct uchcom_divider dv; 700 701 if (calc_divider_settings(&dv, rate)) 702 return EINVAL; 703 704 if ((err = write_reg(sc, 705 UCHCOM_REG_BPS_PRE, dv.dv_prescaler, 706 UCHCOM_REG_BPS_DIV, dv.dv_div)) || 707 (err = write_reg(sc, 708 UCHCOM_REG_BPS_MOD, dv.dv_mod, 709 UCHCOM_REG_BPS_PAD, 0))) { 710 aprint_error_dev(sc->sc_dev, "cannot set DTE rate: %s\n", 711 usbd_errstr(err)); 712 return EIO; 713 } 714 715 return 0; 716 } 717 718 static int 719 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 720 { 721 if (sc->sc_version < UCHCOM_VER_30) { 722 usbd_status err; 723 uint8_t lcr1val = 0, lcr2val = 0; 724 725 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 726 if (err) { 727 aprint_error_dev(sc->sc_dev, "cannot get LCR: %s\n", 728 usbd_errstr(err)); 729 return EIO; 730 } 731 732 lcr1val &= ~UCHCOM_LCR1_MASK; 733 lcr2val &= ~UCHCOM_LCR2_MASK; 734 735 /* 736 * XXX: it is difficult to handle the line control appropriately: 737 * - CS8, !CSTOPB and any parity mode seems ok, but 738 * - the chip doesn't have the function to calculate parity 739 * in !CS8 mode. 740 * - it is unclear that the chip supports CS5,6 mode. 741 * - it is unclear how to handle stop bits. 742 */ 743 744 switch (ISSET(cflag, CSIZE)) { 745 case CS5: 746 case CS6: 747 case CS7: 748 return EINVAL; 749 case CS8: 750 break; 751 } 752 753 if (ISSET(cflag, PARENB)) { 754 lcr1val |= UCHCOM_LCR1_PARENB; 755 if (ISSET(cflag, PARODD)) 756 lcr2val |= UCHCOM_LCR2_PARODD; 757 else 758 lcr2val |= UCHCOM_LCR2_PAREVEN; 759 } 760 761 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 762 if (err) { 763 aprint_error_dev(sc->sc_dev, "cannot set LCR: %s\n", 764 usbd_errstr(err)); 765 return EIO; 766 } 767 } 768 769 return 0; 770 } 771 772 static int 773 clear_chip(struct uchcom_softc *sc) 774 { 775 usbd_status err; 776 777 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 778 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 779 if (err) { 780 aprint_error_dev(sc->sc_dev, "cannot clear: %s\n", 781 usbd_errstr(err)); 782 return EIO; 783 } 784 785 return 0; 786 } 787 788 static int 789 reset_chip(struct uchcom_softc *sc) 790 { 791 usbd_status err; 792 uint8_t lcr1val, lcr2val, pre, div, mod; 793 uint16_t val=0, idx=0; 794 795 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 796 if (err) 797 goto failed; 798 799 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 800 if (err) 801 goto failed; 802 803 err = read_reg(sc, UCHCOM_REG_BPS_MOD, &mod, UCHCOM_REG_BPS_PAD, NULL); 804 if (err) 805 goto failed; 806 807 val |= (uint16_t)(lcr1val&0xF0) << 8; 808 val |= 0x01; 809 val |= (uint16_t)(lcr2val&0x0F) << 8; 810 val |= 0x02; 811 idx |= pre & 0x07; 812 val |= 0x04; 813 idx |= (uint16_t)div << 8; 814 val |= 0x08; 815 idx |= mod & 0xF8; 816 val |= 0x10; 817 818 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 819 device_xname(sc->sc_dev), val, idx)); 820 821 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 822 if (err) 823 goto failed; 824 825 return 0; 826 827 failed: 828 printf("%s: cannot reset: %s\n", 829 device_xname(sc->sc_dev), usbd_errstr(err)); 830 return EIO; 831 } 832 833 static int 834 setup_comm(struct uchcom_softc *sc) 835 { 836 int ret; 837 838 ret = update_version(sc); 839 if (ret) 840 return ret; 841 842 ret = clear_chip(sc); 843 if (ret) 844 return ret; 845 846 ret = set_dte_rate(sc, TTYDEF_SPEED); 847 if (ret) 848 return ret; 849 850 ret = set_line_control(sc, CS8); 851 if (ret) 852 return ret; 853 854 ret = update_status(sc); 855 if (ret) 856 return ret; 857 858 ret = reset_chip(sc); 859 if (ret) 860 return ret; 861 862 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 863 if (ret) 864 return ret; 865 866 sc->sc_dtr = sc->sc_rts = 1; 867 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 868 if (ret) 869 return ret; 870 871 return 0; 872 } 873 874 static int 875 setup_intr_pipe(struct uchcom_softc *sc) 876 { 877 usbd_status err; 878 879 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 880 sc->sc_intr_buf = malloc(sc->sc_intr_size, M_USBDEV, M_WAITOK); 881 err = usbd_open_pipe_intr(sc->sc_iface, 882 sc->sc_intr_endpoint, 883 USBD_SHORT_XFER_OK, 884 &sc->sc_intr_pipe, sc, 885 sc->sc_intr_buf, 886 sc->sc_intr_size, 887 uchcom_intr, USBD_DEFAULT_INTERVAL); 888 if (err) { 889 aprint_error_dev(sc->sc_dev, 890 "cannot open interrupt pipe: %s\n", 891 usbd_errstr(err)); 892 return EIO; 893 } 894 } 895 return 0; 896 } 897 898 static void 899 close_intr_pipe(struct uchcom_softc *sc) 900 { 901 usbd_status err; 902 903 if (sc->sc_dying) 904 return; 905 906 if (sc->sc_intr_pipe != NULL) { 907 err = usbd_abort_pipe(sc->sc_intr_pipe); 908 if (err) 909 aprint_error_dev(sc->sc_dev, 910 "abort interrupt pipe failed: %s\n", 911 usbd_errstr(err)); 912 err = usbd_close_pipe(sc->sc_intr_pipe); 913 if (err) 914 aprint_error_dev(sc->sc_dev, 915 "close interrupt pipe failed: %s\n", 916 usbd_errstr(err)); 917 free(sc->sc_intr_buf, M_USBDEV); 918 sc->sc_intr_pipe = NULL; 919 } 920 } 921 922 923 /* ---------------------------------------------------------------------- 924 * methods for ucom 925 */ 926 void 927 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 928 { 929 struct uchcom_softc *sc = arg; 930 931 if (sc->sc_dying) 932 return; 933 934 *rlsr = sc->sc_lsr; 935 *rmsr = sc->sc_msr; 936 } 937 938 void 939 uchcom_set(void *arg, int portno, int reg, int onoff) 940 { 941 struct uchcom_softc *sc = arg; 942 943 if (sc->sc_dying) 944 return; 945 946 switch (reg) { 947 case UCOM_SET_DTR: 948 sc->sc_dtr = !!onoff; 949 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 950 break; 951 case UCOM_SET_RTS: 952 sc->sc_rts = !!onoff; 953 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 954 break; 955 case UCOM_SET_BREAK: 956 set_break(sc, onoff); 957 break; 958 } 959 } 960 961 int 962 uchcom_param(void *arg, int portno, struct termios *t) 963 { 964 struct uchcom_softc *sc = arg; 965 int ret; 966 967 if (sc->sc_dying) 968 return 0; 969 970 ret = set_line_control(sc, t->c_cflag); 971 if (ret) 972 return ret; 973 974 ret = set_dte_rate(sc, t->c_ospeed); 975 if (ret) 976 return ret; 977 978 return 0; 979 } 980 981 int 982 uchcom_open(void *arg, int portno) 983 { 984 int ret; 985 struct uchcom_softc *sc = arg; 986 987 if (sc->sc_dying) 988 return EIO; 989 990 ret = setup_intr_pipe(sc); 991 if (ret) 992 return ret; 993 994 ret = setup_comm(sc); 995 if (ret) 996 return ret; 997 998 return 0; 999 } 1000 1001 void 1002 uchcom_close(void *arg, int portno) 1003 { 1004 struct uchcom_softc *sc = arg; 1005 1006 if (sc->sc_dying) 1007 return; 1008 1009 close_intr_pipe(sc); 1010 } 1011 1012 1013 /* ---------------------------------------------------------------------- 1014 * callback when the modem status is changed. 1015 */ 1016 void 1017 uchcom_intr(usbd_xfer_handle xfer, usbd_private_handle priv, 1018 usbd_status status) 1019 { 1020 struct uchcom_softc *sc = priv; 1021 u_char *buf = sc->sc_intr_buf; 1022 1023 if (sc->sc_dying) 1024 return; 1025 1026 if (status != USBD_NORMAL_COMPLETION) { 1027 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1028 return; 1029 1030 DPRINTF(("%s: abnormal status: %s\n", 1031 device_xname(sc->sc_dev), usbd_errstr(status))); 1032 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1033 return; 1034 } 1035 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1036 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1037 device_xname(sc->sc_dev), 1038 (unsigned)buf[0], (unsigned)buf[1], 1039 (unsigned)buf[2], (unsigned)buf[3], 1040 (unsigned)buf[4], (unsigned)buf[5], 1041 (unsigned)buf[6], (unsigned)buf[7])); 1042 1043 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1044 ucom_status_change(device_private(sc->sc_subdev)); 1045 } 1046
Indexes created Sat Oct 11 08:10:02 GMT 2025