uchcom.c revision 1.24
1 /* $NetBSD: uchcom.c,v 1.24 2018/12/12 23:21:36 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 1.24 2018/12/12 23:21:36 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_BREAK1 0x05 88 #define UCHCOM_REG_BREAK2 0x18 89 #define UCHCOM_REG_LCR1 0x18 90 #define UCHCOM_REG_LCR2 0x25 91 92 #define UCHCOM_VER_20 0x20 93 #define UCHCOM_VER_30 0x30 94 95 #define UCHCOM_BASE_UNKNOWN 0 96 97 #define UCHCOM_BPS_PRE_IMM 0x80 /* CH341: immediate RX forwarding */ 98 99 #define UCHCOM_DTR_MASK 0x20 100 #define UCHCOM_RTS_MASK 0x40 101 102 #define UCHCOM_BRK1_MASK 0x01 103 #define UCHCOM_BRK2_MASK 0x40 104 105 #define UCHCOM_LCR1_MASK 0xAF 106 #define UCHCOM_LCR2_MASK 0x07 107 #define UCHCOM_LCR1_PARENB 0x80 108 #define UCHCOM_LCR2_PAREVEN 0x07 109 #define UCHCOM_LCR2_PARODD 0x06 110 #define UCHCOM_LCR2_PARMARK 0x05 111 #define UCHCOM_LCR2_PARSPACE 0x04 112 113 #define UCHCOM_INTR_STAT1 0x02 114 #define UCHCOM_INTR_STAT2 0x03 115 #define UCHCOM_INTR_LEAST 4 116 117 #define UCHCOMIBUFSIZE 256 118 #define UCHCOMOBUFSIZE 256 119 120 struct uchcom_softc 121 { 122 device_t sc_dev; 123 struct usbd_device * sc_udev; 124 device_t sc_subdev; 125 struct usbd_interface * sc_iface; 126 int sc_dying; 127 /* */ 128 int sc_intr_endpoint; 129 int sc_intr_size; 130 struct usbd_pipe * sc_intr_pipe; 131 u_char *sc_intr_buf; 132 /* */ 133 uint8_t sc_version; 134 int sc_dtr; 135 int sc_rts; 136 u_char sc_lsr; 137 u_char sc_msr; 138 int sc_lcr1; 139 int sc_lcr2; 140 }; 141 142 struct uchcom_endpoints 143 { 144 int ep_bulkin; 145 int ep_bulkout; 146 int ep_intr; 147 int ep_intr_size; 148 }; 149 150 struct uchcom_divider 151 { 152 uint8_t dv_prescaler; 153 uint8_t dv_div; 154 }; 155 156 struct uchcom_divider_record 157 { 158 uint32_t dvr_high; 159 uint32_t dvr_low; 160 uint32_t dvr_base_clock; 161 struct uchcom_divider dvr_divider; 162 }; 163 164 static const struct uchcom_divider_record dividers[] = 165 { 166 { 307200, 307200, UCHCOM_BASE_UNKNOWN, { 7, 0xD9 } }, 167 { 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3 } }, 168 { 2999999, 23530, 6000000, { 3, 0 } }, 169 { 23529, 2942, 750000, { 2, 0 } }, 170 { 2941, 368, 93750, { 1, 0 } }, 171 { 367, 1, 11719, { 0, 0 } }, 172 }; 173 #define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0])) 174 175 static const struct usb_devno uchcom_devs[] = { 176 { USB_VENDOR_QINHENG2, USB_PRODUCT_QINHENG2_CH341SER }, 177 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH340 }, 178 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH341_ASP }, 179 }; 180 #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) 181 182 Static void uchcom_get_status(void *, int, u_char *, u_char *); 183 Static void uchcom_set(void *, int, int, int); 184 Static int uchcom_param(void *, int, struct termios *); 185 Static int uchcom_open(void *, int); 186 Static void uchcom_close(void *, int); 187 Static void uchcom_intr(struct usbd_xfer *, void *, 188 usbd_status); 189 190 static int set_config(struct uchcom_softc *); 191 static int find_ifaces(struct uchcom_softc *, struct usbd_interface **); 192 static int find_endpoints(struct uchcom_softc *, 193 struct uchcom_endpoints *); 194 static void close_intr_pipe(struct uchcom_softc *); 195 196 197 struct ucom_methods uchcom_methods = { 198 .ucom_get_status = uchcom_get_status, 199 .ucom_set = uchcom_set, 200 .ucom_param = uchcom_param, 201 .ucom_ioctl = NULL, 202 .ucom_open = uchcom_open, 203 .ucom_close = uchcom_close, 204 .ucom_read = NULL, 205 .ucom_write = NULL, 206 }; 207 208 int uchcom_match(device_t, cfdata_t, void *); 209 void uchcom_attach(device_t, device_t, void *); 210 void uchcom_childdet(device_t, device_t); 211 int uchcom_detach(device_t, int); 212 int uchcom_activate(device_t, enum devact); 213 214 extern struct cfdriver uchcom_cd; 215 216 CFATTACH_DECL2_NEW(uchcom, 217 sizeof(struct uchcom_softc), 218 uchcom_match, 219 uchcom_attach, 220 uchcom_detach, 221 uchcom_activate, 222 NULL, 223 uchcom_childdet); 224 225 /* ---------------------------------------------------------------------- 226 * driver entry points 227 */ 228 229 int 230 uchcom_match(device_t parent, cfdata_t match, void *aux) 231 { 232 struct usb_attach_arg *uaa = aux; 233 234 return (uchcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 235 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 236 } 237 238 void 239 uchcom_attach(device_t parent, device_t self, void *aux) 240 { 241 struct uchcom_softc *sc = device_private(self); 242 struct usb_attach_arg *uaa = aux; 243 struct usbd_device *dev = uaa->uaa_device; 244 char *devinfop; 245 struct uchcom_endpoints endpoints; 246 struct ucom_attach_args ucaa; 247 248 aprint_naive("\n"); 249 aprint_normal("\n"); 250 251 devinfop = usbd_devinfo_alloc(dev, 0); 252 aprint_normal_dev(self, "%s\n", devinfop); 253 usbd_devinfo_free(devinfop); 254 255 sc->sc_dev = self; 256 sc->sc_udev = dev; 257 sc->sc_dying = 0; 258 sc->sc_dtr = sc->sc_rts = -1; 259 sc->sc_lsr = sc->sc_msr = 0; 260 261 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 262 263 if (set_config(sc)) 264 goto failed; 265 266 if (find_ifaces(sc, &sc->sc_iface)) 267 goto failed; 268 269 if (find_endpoints(sc, &endpoints)) 270 goto failed; 271 272 sc->sc_intr_endpoint = endpoints.ep_intr; 273 sc->sc_intr_size = endpoints.ep_intr_size; 274 275 /* setup ucom layer */ 276 ucaa.ucaa_portno = UCOM_UNK_PORTNO; 277 ucaa.ucaa_bulkin = endpoints.ep_bulkin; 278 ucaa.ucaa_bulkout = endpoints.ep_bulkout; 279 ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; 280 ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; 281 ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; 282 ucaa.ucaa_opkthdrlen = 0; 283 ucaa.ucaa_device = dev; 284 ucaa.ucaa_iface = sc->sc_iface; 285 ucaa.ucaa_methods = &uchcom_methods; 286 ucaa.ucaa_arg = sc; 287 ucaa.ucaa_info = NULL; 288 289 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 290 291 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa, 292 ucomprint, ucomsubmatch); 293 294 return; 295 296 failed: 297 sc->sc_dying = 1; 298 return; 299 } 300 301 void 302 uchcom_childdet(device_t self, device_t child) 303 { 304 struct uchcom_softc *sc = device_private(self); 305 306 KASSERT(sc->sc_subdev == child); 307 sc->sc_subdev = NULL; 308 } 309 310 int 311 uchcom_detach(device_t self, int flags) 312 { 313 struct uchcom_softc *sc = device_private(self); 314 int rv = 0; 315 316 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 317 318 close_intr_pipe(sc); 319 320 sc->sc_dying = 1; 321 322 if (sc->sc_subdev != NULL) 323 rv = config_detach(sc->sc_subdev, flags); 324 325 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 326 327 return rv; 328 } 329 330 int 331 uchcom_activate(device_t self, enum devact act) 332 { 333 struct uchcom_softc *sc = device_private(self); 334 335 switch (act) { 336 case DVACT_DEACTIVATE: 337 close_intr_pipe(sc); 338 sc->sc_dying = 1; 339 return 0; 340 default: 341 return EOPNOTSUPP; 342 } 343 } 344 345 static int 346 set_config(struct uchcom_softc *sc) 347 { 348 usbd_status err; 349 350 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 351 if (err) { 352 aprint_error_dev(sc->sc_dev, 353 "failed to set configuration: %s\n", usbd_errstr(err)); 354 return -1; 355 } 356 357 return 0; 358 } 359 360 static int 361 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 362 { 363 usbd_status err; 364 365 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 366 riface); 367 if (err) { 368 aprint_error("\n%s: failed to get interface: %s\n", 369 device_xname(sc->sc_dev), usbd_errstr(err)); 370 return -1; 371 } 372 373 return 0; 374 } 375 376 static int 377 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 378 { 379 int i, bin=-1, bout=-1, intr=-1, isize=0; 380 usb_interface_descriptor_t *id; 381 usb_endpoint_descriptor_t *ed; 382 383 id = usbd_get_interface_descriptor(sc->sc_iface); 384 385 for (i = 0; i < id->bNumEndpoints; i++) { 386 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 387 if (ed == NULL) { 388 aprint_error_dev(sc->sc_dev, 389 "no endpoint descriptor for %d\n", i); 390 return -1; 391 } 392 393 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 394 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 395 intr = ed->bEndpointAddress; 396 isize = UGETW(ed->wMaxPacketSize); 397 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 398 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 399 bin = ed->bEndpointAddress; 400 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 401 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 402 bout = ed->bEndpointAddress; 403 } 404 } 405 406 if (intr == -1 || bin == -1 || bout == -1) { 407 if (intr == -1) { 408 aprint_error_dev(sc->sc_dev, 409 "no interrupt end point\n"); 410 } 411 if (bin == -1) { 412 aprint_error_dev(sc->sc_dev, 413 "no data bulk in end point\n"); 414 } 415 if (bout == -1) { 416 aprint_error_dev(sc->sc_dev, 417 "no data bulk out end point\n"); 418 } 419 return -1; 420 } 421 if (isize < UCHCOM_INTR_LEAST) { 422 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 423 return -1; 424 } 425 426 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 427 device_xname(sc->sc_dev), bin, bout, intr, isize)); 428 429 endpoints->ep_intr = intr; 430 endpoints->ep_intr_size = isize; 431 endpoints->ep_bulkin = bin; 432 endpoints->ep_bulkout = bout; 433 434 return 0; 435 } 436 437 438 /* ---------------------------------------------------------------------- 439 * low level i/o 440 */ 441 442 static __inline usbd_status 443 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 444 uint16_t value, uint16_t index) 445 { 446 usb_device_request_t req; 447 448 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 449 req.bRequest = reqno; 450 USETW(req.wValue, value); 451 USETW(req.wIndex, index); 452 USETW(req.wLength, 0); 453 454 return usbd_do_request(sc->sc_udev, &req, 0); 455 } 456 457 static __inline usbd_status 458 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 459 uint16_t value, uint16_t index, void *buf, int buflen, 460 int *actlen) 461 { 462 usb_device_request_t req; 463 464 req.bmRequestType = UT_READ_VENDOR_DEVICE; 465 req.bRequest = reqno; 466 USETW(req.wValue, value); 467 USETW(req.wIndex, index); 468 USETW(req.wLength, (uint16_t)buflen); 469 470 return usbd_do_request_flags(sc->sc_udev, &req, buf, 471 USBD_SHORT_XFER_OK, actlen, 472 USBD_DEFAULT_TIMEOUT); 473 } 474 475 static __inline usbd_status 476 write_reg(struct uchcom_softc *sc, 477 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 478 { 479 DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 480 device_xname(sc->sc_dev), 481 (unsigned)reg1, (unsigned)val1, 482 (unsigned)reg2, (unsigned)val2)); 483 return generic_control_out( 484 sc, UCHCOM_REQ_WRITE_REG, 485 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 486 } 487 488 static __inline usbd_status 489 read_reg(struct uchcom_softc *sc, 490 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 491 { 492 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 493 usbd_status err; 494 int actin; 495 496 err = generic_control_in( 497 sc, UCHCOM_REQ_READ_REG, 498 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 499 if (err) 500 return err; 501 502 DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 503 device_xname(sc->sc_dev), 504 (unsigned)reg1, (unsigned)buf[0], 505 (unsigned)reg2, (unsigned)buf[1])); 506 507 if (rval1) *rval1 = buf[0]; 508 if (rval2) *rval2 = buf[1]; 509 510 return USBD_NORMAL_COMPLETION; 511 } 512 513 static __inline usbd_status 514 get_version(struct uchcom_softc *sc, uint8_t *rver) 515 { 516 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 517 usbd_status err; 518 int actin; 519 520 err = generic_control_in( 521 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 522 if (err) 523 return err; 524 525 if (rver) *rver = buf[0]; 526 527 return USBD_NORMAL_COMPLETION; 528 } 529 530 static __inline usbd_status 531 get_status(struct uchcom_softc *sc, uint8_t *rval) 532 { 533 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 534 } 535 536 static __inline usbd_status 537 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 538 { 539 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 540 } 541 542 static __inline usbd_status 543 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 544 { 545 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 546 } 547 548 549 /* ---------------------------------------------------------------------- 550 * middle layer 551 */ 552 553 static int 554 update_version(struct uchcom_softc *sc) 555 { 556 usbd_status err; 557 558 err = get_version(sc, &sc->sc_version); 559 if (err) { 560 device_printf(sc->sc_dev, "cannot get version: %s\n", 561 usbd_errstr(err)); 562 return EIO; 563 } 564 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 565 566 return 0; 567 } 568 569 static void 570 convert_status(struct uchcom_softc *sc, uint8_t cur) 571 { 572 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 573 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 574 575 cur = ~cur & 0x0F; 576 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 577 } 578 579 static int 580 update_status(struct uchcom_softc *sc) 581 { 582 usbd_status err; 583 uint8_t cur; 584 585 err = get_status(sc, &cur); 586 if (err) { 587 device_printf(sc->sc_dev, 588 "cannot update status: %s\n", usbd_errstr(err)); 589 return EIO; 590 } 591 convert_status(sc, cur); 592 593 return 0; 594 } 595 596 597 static int 598 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 599 { 600 usbd_status err; 601 uint8_t val = 0; 602 603 if (dtr) val |= UCHCOM_DTR_MASK; 604 if (rts) val |= UCHCOM_RTS_MASK; 605 606 if (sc->sc_version < UCHCOM_VER_20) 607 err = set_dtrrts_10(sc, ~val); 608 else 609 err = set_dtrrts_20(sc, ~val); 610 611 if (err) { 612 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 613 usbd_errstr(err)); 614 return EIO; 615 } 616 617 return 0; 618 } 619 620 static int 621 set_break(struct uchcom_softc *sc, int onoff) 622 { 623 usbd_status err; 624 uint8_t brk1, brk2; 625 626 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 627 if (err) 628 return EIO; 629 if (onoff) { 630 /* on - clear bits */ 631 brk1 &= ~UCHCOM_BRK1_MASK; 632 brk2 &= ~UCHCOM_BRK2_MASK; 633 } else { 634 /* off - set bits */ 635 brk1 |= UCHCOM_BRK1_MASK; 636 brk2 |= UCHCOM_BRK2_MASK; 637 } 638 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 639 if (err) 640 return EIO; 641 642 return 0; 643 } 644 645 static int 646 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 647 { 648 int i; 649 const struct uchcom_divider_record *rp; 650 uint32_t div, rem; 651 652 /* find record */ 653 for (i=0; i<NUM_DIVIDERS; i++) { 654 if (dividers[i].dvr_high >= rate && 655 dividers[i].dvr_low <= rate) { 656 rp = ÷rs[i]; 657 goto found; 658 } 659 } 660 return -1; 661 662 found: 663 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 664 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 665 dp->dv_div = rp->dvr_divider.dv_div; 666 else { 667 div = rp->dvr_base_clock / rate; 668 rem = rp->dvr_base_clock % rate; 669 if (div==0 || div>=0xFF) 670 return -1; 671 if ((rem<<1) >= rate) 672 div += 1; 673 dp->dv_div = (uint8_t)-div; 674 } 675 676 return 0; 677 } 678 679 static int 680 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 681 { 682 usbd_status err; 683 struct uchcom_divider dv; 684 685 if (calc_divider_settings(&dv, rate)) 686 return EINVAL; 687 688 if ((err = write_reg(sc, 689 UCHCOM_REG_BPS_PRE, 690 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 691 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 692 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 693 usbd_errstr(err)); 694 return EIO; 695 } 696 697 return 0; 698 } 699 700 static int 701 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 702 { 703 if (sc->sc_version < UCHCOM_VER_30) { 704 usbd_status err; 705 uint8_t lcr1val = 0, lcr2val = 0; 706 707 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 708 if (err) { 709 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 710 usbd_errstr(err)); 711 return EIO; 712 } 713 714 lcr1val &= ~UCHCOM_LCR1_MASK; 715 lcr2val &= ~UCHCOM_LCR2_MASK; 716 717 /* 718 * XXX: it is difficult to handle the line control appropriately: 719 * - CS8, !CSTOPB and any parity mode seems ok, but 720 * - the chip doesn't have the function to calculate parity 721 * in !CS8 mode. 722 * - it is unclear that the chip supports CS5,6 mode. 723 * - it is unclear how to handle stop bits. 724 */ 725 726 switch (ISSET(cflag, CSIZE)) { 727 case CS5: 728 case CS6: 729 case CS7: 730 return EINVAL; 731 case CS8: 732 break; 733 } 734 735 if (ISSET(cflag, PARENB)) { 736 lcr1val |= UCHCOM_LCR1_PARENB; 737 if (ISSET(cflag, PARODD)) 738 lcr2val |= UCHCOM_LCR2_PARODD; 739 else 740 lcr2val |= UCHCOM_LCR2_PAREVEN; 741 } 742 743 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 744 if (err) { 745 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 746 usbd_errstr(err)); 747 return EIO; 748 } 749 } 750 751 return 0; 752 } 753 754 static int 755 clear_chip(struct uchcom_softc *sc) 756 { 757 usbd_status err; 758 759 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 760 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 761 if (err) { 762 device_printf(sc->sc_dev, "cannot clear: %s\n", 763 usbd_errstr(err)); 764 return EIO; 765 } 766 767 return 0; 768 } 769 770 static int 771 reset_chip(struct uchcom_softc *sc) 772 { 773 usbd_status err; 774 uint8_t lcr1val, lcr2val, pre, div; 775 uint16_t val=0, idx=0; 776 777 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 778 if (err) 779 goto failed; 780 781 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 782 if (err) 783 goto failed; 784 785 val |= (uint16_t)(lcr1val&0xF0) << 8; 786 val |= 0x01; 787 val |= (uint16_t)(lcr2val&0x0F) << 8; 788 val |= 0x02; 789 idx |= pre & 0x07; 790 val |= 0x04; 791 idx |= (uint16_t)div << 8; 792 val |= 0x08; 793 val |= 0x10; 794 795 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 796 device_xname(sc->sc_dev), val, idx)); 797 798 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 799 if (err) 800 goto failed; 801 802 return 0; 803 804 failed: 805 printf("%s: cannot reset: %s\n", 806 device_xname(sc->sc_dev), usbd_errstr(err)); 807 return EIO; 808 } 809 810 static int 811 setup_comm(struct uchcom_softc *sc) 812 { 813 int ret; 814 815 ret = update_version(sc); 816 if (ret) 817 return ret; 818 819 ret = clear_chip(sc); 820 if (ret) 821 return ret; 822 823 ret = set_dte_rate(sc, TTYDEF_SPEED); 824 if (ret) 825 return ret; 826 827 ret = set_line_control(sc, CS8); 828 if (ret) 829 return ret; 830 831 ret = update_status(sc); 832 if (ret) 833 return ret; 834 835 ret = reset_chip(sc); 836 if (ret) 837 return ret; 838 839 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 840 if (ret) 841 return ret; 842 843 sc->sc_dtr = sc->sc_rts = 1; 844 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 845 if (ret) 846 return ret; 847 848 return 0; 849 } 850 851 static int 852 setup_intr_pipe(struct uchcom_softc *sc) 853 { 854 usbd_status err; 855 856 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 857 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 858 err = usbd_open_pipe_intr(sc->sc_iface, 859 sc->sc_intr_endpoint, 860 USBD_SHORT_XFER_OK, 861 &sc->sc_intr_pipe, sc, 862 sc->sc_intr_buf, 863 sc->sc_intr_size, 864 uchcom_intr, USBD_DEFAULT_INTERVAL); 865 if (err) { 866 device_printf(sc->sc_dev, 867 "cannot open interrupt pipe: %s\n", 868 usbd_errstr(err)); 869 return EIO; 870 } 871 } 872 return 0; 873 } 874 875 static void 876 close_intr_pipe(struct uchcom_softc *sc) 877 { 878 usbd_status err; 879 880 if (sc->sc_dying) 881 return; 882 883 if (sc->sc_intr_pipe != NULL) { 884 err = usbd_abort_pipe(sc->sc_intr_pipe); 885 if (err) 886 device_printf(sc->sc_dev, 887 "abort interrupt pipe failed: %s\n", 888 usbd_errstr(err)); 889 err = usbd_close_pipe(sc->sc_intr_pipe); 890 if (err) 891 device_printf(sc->sc_dev, 892 "close interrupt pipe failed: %s\n", 893 usbd_errstr(err)); 894 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 895 sc->sc_intr_pipe = NULL; 896 } 897 } 898 899 900 /* ---------------------------------------------------------------------- 901 * methods for ucom 902 */ 903 void 904 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 905 { 906 struct uchcom_softc *sc = arg; 907 908 if (sc->sc_dying) 909 return; 910 911 *rlsr = sc->sc_lsr; 912 *rmsr = sc->sc_msr; 913 } 914 915 void 916 uchcom_set(void *arg, int portno, int reg, int onoff) 917 { 918 struct uchcom_softc *sc = arg; 919 920 if (sc->sc_dying) 921 return; 922 923 switch (reg) { 924 case UCOM_SET_DTR: 925 sc->sc_dtr = !!onoff; 926 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 927 break; 928 case UCOM_SET_RTS: 929 sc->sc_rts = !!onoff; 930 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 931 break; 932 case UCOM_SET_BREAK: 933 set_break(sc, onoff); 934 break; 935 } 936 } 937 938 int 939 uchcom_param(void *arg, int portno, struct termios *t) 940 { 941 struct uchcom_softc *sc = arg; 942 int ret; 943 944 if (sc->sc_dying) 945 return 0; 946 947 ret = set_line_control(sc, t->c_cflag); 948 if (ret) 949 return ret; 950 951 ret = set_dte_rate(sc, t->c_ospeed); 952 if (ret) 953 return ret; 954 955 return 0; 956 } 957 958 int 959 uchcom_open(void *arg, int portno) 960 { 961 int ret; 962 struct uchcom_softc *sc = arg; 963 964 if (sc->sc_dying) 965 return EIO; 966 967 ret = setup_intr_pipe(sc); 968 if (ret) 969 return ret; 970 971 ret = setup_comm(sc); 972 if (ret) 973 return ret; 974 975 return 0; 976 } 977 978 void 979 uchcom_close(void *arg, int portno) 980 { 981 struct uchcom_softc *sc = arg; 982 983 if (sc->sc_dying) 984 return; 985 986 close_intr_pipe(sc); 987 } 988 989 990 /* ---------------------------------------------------------------------- 991 * callback when the modem status is changed. 992 */ 993 void 994 uchcom_intr(struct usbd_xfer *xfer, void * priv, 995 usbd_status status) 996 { 997 struct uchcom_softc *sc = priv; 998 u_char *buf = sc->sc_intr_buf; 999 1000 if (sc->sc_dying) 1001 return; 1002 1003 if (status != USBD_NORMAL_COMPLETION) { 1004 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1005 return; 1006 1007 DPRINTF(("%s: abnormal status: %s\n", 1008 device_xname(sc->sc_dev), usbd_errstr(status))); 1009 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1010 return; 1011 } 1012 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1013 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1014 device_xname(sc->sc_dev), 1015 (unsigned)buf[0], (unsigned)buf[1], 1016 (unsigned)buf[2], (unsigned)buf[3], 1017 (unsigned)buf[4], (unsigned)buf[5], 1018 (unsigned)buf[6], (unsigned)buf[7])); 1019 1020 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1021 ucom_status_change(device_private(sc->sc_subdev)); 1022 } 1023
Indexes created Sat Oct 11 08:10:02 GMT 2025