uchcom.c revision 1.25
1 /* $NetBSD: uchcom.c,v 1.25 2018/12/12 23:26:00 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 1.25 2018/12/12 23:26:00 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 }; 139 140 struct uchcom_endpoints 141 { 142 int ep_bulkin; 143 int ep_bulkout; 144 int ep_intr; 145 int ep_intr_size; 146 }; 147 148 struct uchcom_divider 149 { 150 uint8_t dv_prescaler; 151 uint8_t dv_div; 152 }; 153 154 struct uchcom_divider_record 155 { 156 uint32_t dvr_high; 157 uint32_t dvr_low; 158 uint32_t dvr_base_clock; 159 struct uchcom_divider dvr_divider; 160 }; 161 162 static const struct uchcom_divider_record dividers[] = 163 { 164 { 307200, 307200, UCHCOM_BASE_UNKNOWN, { 7, 0xD9 } }, 165 { 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3 } }, 166 { 2999999, 23530, 6000000, { 3, 0 } }, 167 { 23529, 2942, 750000, { 2, 0 } }, 168 { 2941, 368, 93750, { 1, 0 } }, 169 { 367, 1, 11719, { 0, 0 } }, 170 }; 171 #define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0])) 172 173 static const struct usb_devno uchcom_devs[] = { 174 { USB_VENDOR_QINHENG2, USB_PRODUCT_QINHENG2_CH341SER }, 175 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH340 }, 176 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH341_ASP }, 177 }; 178 #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) 179 180 Static void uchcom_get_status(void *, int, u_char *, u_char *); 181 Static void uchcom_set(void *, int, int, int); 182 Static int uchcom_param(void *, int, struct termios *); 183 Static int uchcom_open(void *, int); 184 Static void uchcom_close(void *, int); 185 Static void uchcom_intr(struct usbd_xfer *, void *, 186 usbd_status); 187 188 static int set_config(struct uchcom_softc *); 189 static int find_ifaces(struct uchcom_softc *, struct usbd_interface **); 190 static int find_endpoints(struct uchcom_softc *, 191 struct uchcom_endpoints *); 192 static void close_intr_pipe(struct uchcom_softc *); 193 194 195 struct ucom_methods uchcom_methods = { 196 .ucom_get_status = uchcom_get_status, 197 .ucom_set = uchcom_set, 198 .ucom_param = uchcom_param, 199 .ucom_ioctl = NULL, 200 .ucom_open = uchcom_open, 201 .ucom_close = uchcom_close, 202 .ucom_read = NULL, 203 .ucom_write = NULL, 204 }; 205 206 int uchcom_match(device_t, cfdata_t, void *); 207 void uchcom_attach(device_t, device_t, void *); 208 void uchcom_childdet(device_t, device_t); 209 int uchcom_detach(device_t, int); 210 int uchcom_activate(device_t, enum devact); 211 212 extern struct cfdriver uchcom_cd; 213 214 CFATTACH_DECL2_NEW(uchcom, 215 sizeof(struct uchcom_softc), 216 uchcom_match, 217 uchcom_attach, 218 uchcom_detach, 219 uchcom_activate, 220 NULL, 221 uchcom_childdet); 222 223 /* ---------------------------------------------------------------------- 224 * driver entry points 225 */ 226 227 int 228 uchcom_match(device_t parent, cfdata_t match, void *aux) 229 { 230 struct usb_attach_arg *uaa = aux; 231 232 return (uchcom_lookup(uaa->uaa_vendor, uaa->uaa_product) != NULL ? 233 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 234 } 235 236 void 237 uchcom_attach(device_t parent, device_t self, void *aux) 238 { 239 struct uchcom_softc *sc = device_private(self); 240 struct usb_attach_arg *uaa = aux; 241 struct usbd_device *dev = uaa->uaa_device; 242 char *devinfop; 243 struct uchcom_endpoints endpoints; 244 struct ucom_attach_args ucaa; 245 246 aprint_naive("\n"); 247 aprint_normal("\n"); 248 249 devinfop = usbd_devinfo_alloc(dev, 0); 250 aprint_normal_dev(self, "%s\n", devinfop); 251 usbd_devinfo_free(devinfop); 252 253 sc->sc_dev = self; 254 sc->sc_udev = dev; 255 sc->sc_dying = 0; 256 sc->sc_dtr = sc->sc_rts = -1; 257 sc->sc_lsr = sc->sc_msr = 0; 258 259 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 260 261 if (set_config(sc)) 262 goto failed; 263 264 if (find_ifaces(sc, &sc->sc_iface)) 265 goto failed; 266 267 if (find_endpoints(sc, &endpoints)) 268 goto failed; 269 270 sc->sc_intr_endpoint = endpoints.ep_intr; 271 sc->sc_intr_size = endpoints.ep_intr_size; 272 273 /* setup ucom layer */ 274 ucaa.ucaa_portno = UCOM_UNK_PORTNO; 275 ucaa.ucaa_bulkin = endpoints.ep_bulkin; 276 ucaa.ucaa_bulkout = endpoints.ep_bulkout; 277 ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; 278 ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; 279 ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; 280 ucaa.ucaa_opkthdrlen = 0; 281 ucaa.ucaa_device = dev; 282 ucaa.ucaa_iface = sc->sc_iface; 283 ucaa.ucaa_methods = &uchcom_methods; 284 ucaa.ucaa_arg = sc; 285 ucaa.ucaa_info = NULL; 286 287 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 288 289 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa, 290 ucomprint, ucomsubmatch); 291 292 return; 293 294 failed: 295 sc->sc_dying = 1; 296 return; 297 } 298 299 void 300 uchcom_childdet(device_t self, device_t child) 301 { 302 struct uchcom_softc *sc = device_private(self); 303 304 KASSERT(sc->sc_subdev == child); 305 sc->sc_subdev = NULL; 306 } 307 308 int 309 uchcom_detach(device_t self, int flags) 310 { 311 struct uchcom_softc *sc = device_private(self); 312 int rv = 0; 313 314 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 315 316 close_intr_pipe(sc); 317 318 sc->sc_dying = 1; 319 320 if (sc->sc_subdev != NULL) 321 rv = config_detach(sc->sc_subdev, flags); 322 323 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 324 325 return rv; 326 } 327 328 int 329 uchcom_activate(device_t self, enum devact act) 330 { 331 struct uchcom_softc *sc = device_private(self); 332 333 switch (act) { 334 case DVACT_DEACTIVATE: 335 close_intr_pipe(sc); 336 sc->sc_dying = 1; 337 return 0; 338 default: 339 return EOPNOTSUPP; 340 } 341 } 342 343 static int 344 set_config(struct uchcom_softc *sc) 345 { 346 usbd_status err; 347 348 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 349 if (err) { 350 aprint_error_dev(sc->sc_dev, 351 "failed to set configuration: %s\n", usbd_errstr(err)); 352 return -1; 353 } 354 355 return 0; 356 } 357 358 static int 359 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 360 { 361 usbd_status err; 362 363 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 364 riface); 365 if (err) { 366 aprint_error("\n%s: failed to get interface: %s\n", 367 device_xname(sc->sc_dev), usbd_errstr(err)); 368 return -1; 369 } 370 371 return 0; 372 } 373 374 static int 375 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 376 { 377 int i, bin=-1, bout=-1, intr=-1, isize=0; 378 usb_interface_descriptor_t *id; 379 usb_endpoint_descriptor_t *ed; 380 381 id = usbd_get_interface_descriptor(sc->sc_iface); 382 383 for (i = 0; i < id->bNumEndpoints; i++) { 384 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 385 if (ed == NULL) { 386 aprint_error_dev(sc->sc_dev, 387 "no endpoint descriptor for %d\n", i); 388 return -1; 389 } 390 391 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 392 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 393 intr = ed->bEndpointAddress; 394 isize = UGETW(ed->wMaxPacketSize); 395 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 396 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 397 bin = ed->bEndpointAddress; 398 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 399 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 400 bout = ed->bEndpointAddress; 401 } 402 } 403 404 if (intr == -1 || bin == -1 || bout == -1) { 405 if (intr == -1) { 406 aprint_error_dev(sc->sc_dev, 407 "no interrupt end point\n"); 408 } 409 if (bin == -1) { 410 aprint_error_dev(sc->sc_dev, 411 "no data bulk in end point\n"); 412 } 413 if (bout == -1) { 414 aprint_error_dev(sc->sc_dev, 415 "no data bulk out end point\n"); 416 } 417 return -1; 418 } 419 if (isize < UCHCOM_INTR_LEAST) { 420 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 421 return -1; 422 } 423 424 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 425 device_xname(sc->sc_dev), bin, bout, intr, isize)); 426 427 endpoints->ep_intr = intr; 428 endpoints->ep_intr_size = isize; 429 endpoints->ep_bulkin = bin; 430 endpoints->ep_bulkout = bout; 431 432 return 0; 433 } 434 435 436 /* ---------------------------------------------------------------------- 437 * low level i/o 438 */ 439 440 static __inline usbd_status 441 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 442 uint16_t value, uint16_t index) 443 { 444 usb_device_request_t req; 445 446 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 447 req.bRequest = reqno; 448 USETW(req.wValue, value); 449 USETW(req.wIndex, index); 450 USETW(req.wLength, 0); 451 452 return usbd_do_request(sc->sc_udev, &req, 0); 453 } 454 455 static __inline usbd_status 456 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 457 uint16_t value, uint16_t index, void *buf, int buflen, 458 int *actlen) 459 { 460 usb_device_request_t req; 461 462 req.bmRequestType = UT_READ_VENDOR_DEVICE; 463 req.bRequest = reqno; 464 USETW(req.wValue, value); 465 USETW(req.wIndex, index); 466 USETW(req.wLength, (uint16_t)buflen); 467 468 return usbd_do_request_flags(sc->sc_udev, &req, buf, 469 USBD_SHORT_XFER_OK, actlen, 470 USBD_DEFAULT_TIMEOUT); 471 } 472 473 static __inline usbd_status 474 write_reg(struct uchcom_softc *sc, 475 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 476 { 477 DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 478 device_xname(sc->sc_dev), 479 (unsigned)reg1, (unsigned)val1, 480 (unsigned)reg2, (unsigned)val2)); 481 return generic_control_out( 482 sc, UCHCOM_REQ_WRITE_REG, 483 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 484 } 485 486 static __inline usbd_status 487 read_reg(struct uchcom_softc *sc, 488 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 489 { 490 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 491 usbd_status err; 492 int actin; 493 494 err = generic_control_in( 495 sc, UCHCOM_REQ_READ_REG, 496 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 497 if (err) 498 return err; 499 500 DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 501 device_xname(sc->sc_dev), 502 (unsigned)reg1, (unsigned)buf[0], 503 (unsigned)reg2, (unsigned)buf[1])); 504 505 if (rval1) *rval1 = buf[0]; 506 if (rval2) *rval2 = buf[1]; 507 508 return USBD_NORMAL_COMPLETION; 509 } 510 511 static __inline usbd_status 512 get_version(struct uchcom_softc *sc, uint8_t *rver) 513 { 514 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 515 usbd_status err; 516 int actin; 517 518 err = generic_control_in( 519 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 520 if (err) 521 return err; 522 523 if (rver) *rver = buf[0]; 524 525 return USBD_NORMAL_COMPLETION; 526 } 527 528 static __inline usbd_status 529 get_status(struct uchcom_softc *sc, uint8_t *rval) 530 { 531 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 532 } 533 534 static __inline usbd_status 535 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 536 { 537 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 538 } 539 540 static __inline usbd_status 541 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 542 { 543 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 544 } 545 546 547 /* ---------------------------------------------------------------------- 548 * middle layer 549 */ 550 551 static int 552 update_version(struct uchcom_softc *sc) 553 { 554 usbd_status err; 555 556 err = get_version(sc, &sc->sc_version); 557 if (err) { 558 device_printf(sc->sc_dev, "cannot get version: %s\n", 559 usbd_errstr(err)); 560 return EIO; 561 } 562 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 563 564 return 0; 565 } 566 567 static void 568 convert_status(struct uchcom_softc *sc, uint8_t cur) 569 { 570 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 571 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 572 573 cur = ~cur & 0x0F; 574 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 575 } 576 577 static int 578 update_status(struct uchcom_softc *sc) 579 { 580 usbd_status err; 581 uint8_t cur; 582 583 err = get_status(sc, &cur); 584 if (err) { 585 device_printf(sc->sc_dev, 586 "cannot update status: %s\n", usbd_errstr(err)); 587 return EIO; 588 } 589 convert_status(sc, cur); 590 591 return 0; 592 } 593 594 595 static int 596 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 597 { 598 usbd_status err; 599 uint8_t val = 0; 600 601 if (dtr) val |= UCHCOM_DTR_MASK; 602 if (rts) val |= UCHCOM_RTS_MASK; 603 604 if (sc->sc_version < UCHCOM_VER_20) 605 err = set_dtrrts_10(sc, ~val); 606 else 607 err = set_dtrrts_20(sc, ~val); 608 609 if (err) { 610 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 611 usbd_errstr(err)); 612 return EIO; 613 } 614 615 return 0; 616 } 617 618 static int 619 set_break(struct uchcom_softc *sc, int onoff) 620 { 621 usbd_status err; 622 uint8_t brk1, brk2; 623 624 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 625 if (err) 626 return EIO; 627 if (onoff) { 628 /* on - clear bits */ 629 brk1 &= ~UCHCOM_BRK1_MASK; 630 brk2 &= ~UCHCOM_BRK2_MASK; 631 } else { 632 /* off - set bits */ 633 brk1 |= UCHCOM_BRK1_MASK; 634 brk2 |= UCHCOM_BRK2_MASK; 635 } 636 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 637 if (err) 638 return EIO; 639 640 return 0; 641 } 642 643 static int 644 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 645 { 646 int i; 647 const struct uchcom_divider_record *rp; 648 uint32_t div, rem; 649 650 /* find record */ 651 for (i=0; i<NUM_DIVIDERS; i++) { 652 if (dividers[i].dvr_high >= rate && 653 dividers[i].dvr_low <= rate) { 654 rp = ÷rs[i]; 655 goto found; 656 } 657 } 658 return -1; 659 660 found: 661 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 662 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 663 dp->dv_div = rp->dvr_divider.dv_div; 664 else { 665 div = rp->dvr_base_clock / rate; 666 rem = rp->dvr_base_clock % rate; 667 if (div==0 || div>=0xFF) 668 return -1; 669 if ((rem<<1) >= rate) 670 div += 1; 671 dp->dv_div = (uint8_t)-div; 672 } 673 674 return 0; 675 } 676 677 static int 678 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 679 { 680 usbd_status err; 681 struct uchcom_divider dv; 682 683 if (calc_divider_settings(&dv, rate)) 684 return EINVAL; 685 686 if ((err = write_reg(sc, 687 UCHCOM_REG_BPS_PRE, 688 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 689 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 690 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 691 usbd_errstr(err)); 692 return EIO; 693 } 694 695 return 0; 696 } 697 698 static int 699 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 700 { 701 if (sc->sc_version < UCHCOM_VER_30) { 702 usbd_status err; 703 uint8_t lcr1val = 0, lcr2val = 0; 704 705 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 706 if (err) { 707 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 708 usbd_errstr(err)); 709 return EIO; 710 } 711 712 lcr1val &= ~UCHCOM_LCR1_MASK; 713 lcr2val &= ~UCHCOM_LCR2_MASK; 714 715 /* 716 * XXX: it is difficult to handle the line control appropriately: 717 * - CS8, !CSTOPB and any parity mode seems ok, but 718 * - the chip doesn't have the function to calculate parity 719 * in !CS8 mode. 720 * - it is unclear that the chip supports CS5,6 mode. 721 * - it is unclear how to handle stop bits. 722 */ 723 724 switch (ISSET(cflag, CSIZE)) { 725 case CS5: 726 case CS6: 727 case CS7: 728 return EINVAL; 729 case CS8: 730 break; 731 } 732 733 if (ISSET(cflag, PARENB)) { 734 lcr1val |= UCHCOM_LCR1_PARENB; 735 if (ISSET(cflag, PARODD)) 736 lcr2val |= UCHCOM_LCR2_PARODD; 737 else 738 lcr2val |= UCHCOM_LCR2_PAREVEN; 739 } 740 741 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 742 if (err) { 743 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 744 usbd_errstr(err)); 745 return EIO; 746 } 747 } 748 749 return 0; 750 } 751 752 static int 753 clear_chip(struct uchcom_softc *sc) 754 { 755 usbd_status err; 756 757 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 758 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 759 if (err) { 760 device_printf(sc->sc_dev, "cannot clear: %s\n", 761 usbd_errstr(err)); 762 return EIO; 763 } 764 765 return 0; 766 } 767 768 static int 769 reset_chip(struct uchcom_softc *sc) 770 { 771 usbd_status err; 772 uint8_t lcr1val, lcr2val, pre, div; 773 uint16_t val=0, idx=0; 774 775 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 776 if (err) 777 goto failed; 778 779 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 780 if (err) 781 goto failed; 782 783 val |= (uint16_t)(lcr1val&0xF0) << 8; 784 val |= 0x01; 785 val |= (uint16_t)(lcr2val&0x0F) << 8; 786 val |= 0x02; 787 idx |= pre & 0x07; 788 val |= 0x04; 789 idx |= (uint16_t)div << 8; 790 val |= 0x08; 791 val |= 0x10; 792 793 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 794 device_xname(sc->sc_dev), val, idx)); 795 796 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 797 if (err) 798 goto failed; 799 800 return 0; 801 802 failed: 803 printf("%s: cannot reset: %s\n", 804 device_xname(sc->sc_dev), usbd_errstr(err)); 805 return EIO; 806 } 807 808 static int 809 setup_comm(struct uchcom_softc *sc) 810 { 811 int ret; 812 813 ret = update_version(sc); 814 if (ret) 815 return ret; 816 817 ret = clear_chip(sc); 818 if (ret) 819 return ret; 820 821 ret = set_dte_rate(sc, TTYDEF_SPEED); 822 if (ret) 823 return ret; 824 825 ret = set_line_control(sc, CS8); 826 if (ret) 827 return ret; 828 829 ret = update_status(sc); 830 if (ret) 831 return ret; 832 833 ret = reset_chip(sc); 834 if (ret) 835 return ret; 836 837 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 838 if (ret) 839 return ret; 840 841 sc->sc_dtr = sc->sc_rts = 1; 842 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 843 if (ret) 844 return ret; 845 846 return 0; 847 } 848 849 static int 850 setup_intr_pipe(struct uchcom_softc *sc) 851 { 852 usbd_status err; 853 854 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 855 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 856 err = usbd_open_pipe_intr(sc->sc_iface, 857 sc->sc_intr_endpoint, 858 USBD_SHORT_XFER_OK, 859 &sc->sc_intr_pipe, sc, 860 sc->sc_intr_buf, 861 sc->sc_intr_size, 862 uchcom_intr, USBD_DEFAULT_INTERVAL); 863 if (err) { 864 device_printf(sc->sc_dev, 865 "cannot open interrupt pipe: %s\n", 866 usbd_errstr(err)); 867 return EIO; 868 } 869 } 870 return 0; 871 } 872 873 static void 874 close_intr_pipe(struct uchcom_softc *sc) 875 { 876 usbd_status err; 877 878 if (sc->sc_dying) 879 return; 880 881 if (sc->sc_intr_pipe != NULL) { 882 err = usbd_abort_pipe(sc->sc_intr_pipe); 883 if (err) 884 device_printf(sc->sc_dev, 885 "abort interrupt pipe failed: %s\n", 886 usbd_errstr(err)); 887 err = usbd_close_pipe(sc->sc_intr_pipe); 888 if (err) 889 device_printf(sc->sc_dev, 890 "close interrupt pipe failed: %s\n", 891 usbd_errstr(err)); 892 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 893 sc->sc_intr_pipe = NULL; 894 } 895 } 896 897 898 /* ---------------------------------------------------------------------- 899 * methods for ucom 900 */ 901 void 902 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 903 { 904 struct uchcom_softc *sc = arg; 905 906 if (sc->sc_dying) 907 return; 908 909 *rlsr = sc->sc_lsr; 910 *rmsr = sc->sc_msr; 911 } 912 913 void 914 uchcom_set(void *arg, int portno, int reg, int onoff) 915 { 916 struct uchcom_softc *sc = arg; 917 918 if (sc->sc_dying) 919 return; 920 921 switch (reg) { 922 case UCOM_SET_DTR: 923 sc->sc_dtr = !!onoff; 924 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 925 break; 926 case UCOM_SET_RTS: 927 sc->sc_rts = !!onoff; 928 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 929 break; 930 case UCOM_SET_BREAK: 931 set_break(sc, onoff); 932 break; 933 } 934 } 935 936 int 937 uchcom_param(void *arg, int portno, struct termios *t) 938 { 939 struct uchcom_softc *sc = arg; 940 int ret; 941 942 if (sc->sc_dying) 943 return 0; 944 945 ret = set_line_control(sc, t->c_cflag); 946 if (ret) 947 return ret; 948 949 ret = set_dte_rate(sc, t->c_ospeed); 950 if (ret) 951 return ret; 952 953 return 0; 954 } 955 956 int 957 uchcom_open(void *arg, int portno) 958 { 959 int ret; 960 struct uchcom_softc *sc = arg; 961 962 if (sc->sc_dying) 963 return EIO; 964 965 ret = setup_intr_pipe(sc); 966 if (ret) 967 return ret; 968 969 ret = setup_comm(sc); 970 if (ret) 971 return ret; 972 973 return 0; 974 } 975 976 void 977 uchcom_close(void *arg, int portno) 978 { 979 struct uchcom_softc *sc = arg; 980 981 if (sc->sc_dying) 982 return; 983 984 close_intr_pipe(sc); 985 } 986 987 988 /* ---------------------------------------------------------------------- 989 * callback when the modem status is changed. 990 */ 991 void 992 uchcom_intr(struct usbd_xfer *xfer, void * priv, 993 usbd_status status) 994 { 995 struct uchcom_softc *sc = priv; 996 u_char *buf = sc->sc_intr_buf; 997 998 if (sc->sc_dying) 999 return; 1000 1001 if (status != USBD_NORMAL_COMPLETION) { 1002 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1003 return; 1004 1005 DPRINTF(("%s: abnormal status: %s\n", 1006 device_xname(sc->sc_dev), usbd_errstr(status))); 1007 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1008 return; 1009 } 1010 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1011 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1012 device_xname(sc->sc_dev), 1013 (unsigned)buf[0], (unsigned)buf[1], 1014 (unsigned)buf[2], (unsigned)buf[3], 1015 (unsigned)buf[4], (unsigned)buf[5], 1016 (unsigned)buf[6], (unsigned)buf[7])); 1017 1018 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1019 ucom_status_change(device_private(sc->sc_subdev)); 1020 } 1021
Indexes created Sat Oct 11 08:10:02 GMT 2025