uchcom.c revision 1.23
1 /* $NetBSD: uchcom.c,v 1.23 2018/12/11 01:07:29 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 1.23 2018/12/11 01:07:29 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 #include <dev/usb/usbcdc.h> 58 59 #include <dev/usb/usbdi.h> 60 #include <dev/usb/usbdi_util.h> 61 #include <dev/usb/usbdevs.h> 62 #include <dev/usb/usb_quirks.h> 63 64 #include <dev/usb/ucomvar.h> 65 66 #ifdef UCHCOM_DEBUG 67 #define DPRINTFN(n, x) if (uchcomdebug > (n)) printf x 68 int uchcomdebug = 0; 69 #else 70 #define DPRINTFN(n, x) 71 #endif 72 #define DPRINTF(x) DPRINTFN(0, x) 73 74 #define UCHCOM_IFACE_INDEX 0 75 #define UCHCOM_CONFIG_INDEX 0 76 77 #define UCHCOM_INPUT_BUF_SIZE 8 78 79 #define UCHCOM_REQ_GET_VERSION 0x5F 80 #define UCHCOM_REQ_READ_REG 0x95 81 #define UCHCOM_REQ_WRITE_REG 0x9A 82 #define UCHCOM_REQ_RESET 0xA1 83 #define UCHCOM_REQ_SET_DTRRTS 0xA4 84 85 #define UCHCOM_REG_STAT1 0x06 86 #define UCHCOM_REG_STAT2 0x07 87 #define UCHCOM_REG_BPS_PRE 0x12 88 #define UCHCOM_REG_BPS_DIV 0x13 89 #define UCHCOM_REG_BREAK1 0x05 90 #define UCHCOM_REG_BREAK2 0x18 91 #define UCHCOM_REG_LCR1 0x18 92 #define UCHCOM_REG_LCR2 0x25 93 94 #define UCHCOM_VER_20 0x20 95 #define UCHCOM_VER_30 0x30 96 97 #define UCHCOM_BASE_UNKNOWN 0 98 99 #define UCHCOM_BPS_PRE_IMM 0x80 /* CH341: immediate RX forwarding */ 100 101 #define UCHCOM_DTR_MASK 0x20 102 #define UCHCOM_RTS_MASK 0x40 103 104 #define UCHCOM_BRK1_MASK 0x01 105 #define UCHCOM_BRK2_MASK 0x40 106 107 #define UCHCOM_LCR1_MASK 0xAF 108 #define UCHCOM_LCR2_MASK 0x07 109 #define UCHCOM_LCR1_PARENB 0x80 110 #define UCHCOM_LCR2_PAREVEN 0x07 111 #define UCHCOM_LCR2_PARODD 0x06 112 #define UCHCOM_LCR2_PARMARK 0x05 113 #define UCHCOM_LCR2_PARSPACE 0x04 114 115 #define UCHCOM_INTR_STAT1 0x02 116 #define UCHCOM_INTR_STAT2 0x03 117 #define UCHCOM_INTR_LEAST 4 118 119 #define UCHCOMIBUFSIZE 256 120 #define UCHCOMOBUFSIZE 256 121 122 struct uchcom_softc 123 { 124 device_t sc_dev; 125 struct usbd_device * sc_udev; 126 device_t sc_subdev; 127 struct usbd_interface * sc_iface; 128 int sc_dying; 129 /* */ 130 int sc_intr_endpoint; 131 int sc_intr_size; 132 struct usbd_pipe * sc_intr_pipe; 133 u_char *sc_intr_buf; 134 /* */ 135 uint8_t sc_version; 136 int sc_dtr; 137 int sc_rts; 138 u_char sc_lsr; 139 u_char sc_msr; 140 int sc_lcr1; 141 int sc_lcr2; 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 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 } }, 169 { 921600, 921600, UCHCOM_BASE_UNKNOWN, { 7, 0xF3 } }, 170 { 2999999, 23530, 6000000, { 3, 0 } }, 171 { 23529, 2942, 750000, { 2, 0 } }, 172 { 2941, 368, 93750, { 1, 0 } }, 173 { 367, 1, 11719, { 0, 0 } }, 174 }; 175 #define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0])) 176 177 static const struct usb_devno uchcom_devs[] = { 178 { USB_VENDOR_QINHENG2, USB_PRODUCT_QINHENG2_CH341SER }, 179 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH340 }, 180 { USB_VENDOR_QINHENG, USB_PRODUCT_QINHENG_CH341_ASP }, 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(struct usbd_xfer *, void *, 190 usbd_status); 191 192 static int set_config(struct uchcom_softc *); 193 static int find_ifaces(struct uchcom_softc *, struct usbd_interface **); 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->uaa_vendor, uaa->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 struct usbd_device *dev = uaa->uaa_device; 246 char *devinfop; 247 struct uchcom_endpoints endpoints; 248 struct ucom_attach_args ucaa; 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 if (find_ifaces(sc, &sc->sc_iface)) 269 goto failed; 270 271 if (find_endpoints(sc, &endpoints)) 272 goto failed; 273 274 sc->sc_intr_endpoint = endpoints.ep_intr; 275 sc->sc_intr_size = endpoints.ep_intr_size; 276 277 /* setup ucom layer */ 278 ucaa.ucaa_portno = UCOM_UNK_PORTNO; 279 ucaa.ucaa_bulkin = endpoints.ep_bulkin; 280 ucaa.ucaa_bulkout = endpoints.ep_bulkout; 281 ucaa.ucaa_ibufsize = UCHCOMIBUFSIZE; 282 ucaa.ucaa_obufsize = UCHCOMOBUFSIZE; 283 ucaa.ucaa_ibufsizepad = UCHCOMIBUFSIZE; 284 ucaa.ucaa_opkthdrlen = 0; 285 ucaa.ucaa_device = dev; 286 ucaa.ucaa_iface = sc->sc_iface; 287 ucaa.ucaa_methods = &uchcom_methods; 288 ucaa.ucaa_arg = sc; 289 ucaa.ucaa_info = NULL; 290 291 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, sc->sc_dev); 292 293 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &ucaa, 294 ucomprint, ucomsubmatch); 295 296 return; 297 298 failed: 299 sc->sc_dying = 1; 300 return; 301 } 302 303 void 304 uchcom_childdet(device_t self, device_t child) 305 { 306 struct uchcom_softc *sc = device_private(self); 307 308 KASSERT(sc->sc_subdev == child); 309 sc->sc_subdev = NULL; 310 } 311 312 int 313 uchcom_detach(device_t self, int flags) 314 { 315 struct uchcom_softc *sc = device_private(self); 316 int rv = 0; 317 318 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 319 320 close_intr_pipe(sc); 321 322 sc->sc_dying = 1; 323 324 if (sc->sc_subdev != NULL) 325 rv = config_detach(sc->sc_subdev, flags); 326 327 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, sc->sc_dev); 328 329 return rv; 330 } 331 332 int 333 uchcom_activate(device_t self, enum devact act) 334 { 335 struct uchcom_softc *sc = device_private(self); 336 337 switch (act) { 338 case DVACT_DEACTIVATE: 339 close_intr_pipe(sc); 340 sc->sc_dying = 1; 341 return 0; 342 default: 343 return EOPNOTSUPP; 344 } 345 } 346 347 static int 348 set_config(struct uchcom_softc *sc) 349 { 350 usbd_status err; 351 352 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 353 if (err) { 354 aprint_error_dev(sc->sc_dev, 355 "failed to set configuration: %s\n", usbd_errstr(err)); 356 return -1; 357 } 358 359 return 0; 360 } 361 362 static int 363 find_ifaces(struct uchcom_softc *sc, struct usbd_interface **riface) 364 { 365 usbd_status err; 366 367 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 368 riface); 369 if (err) { 370 aprint_error("\n%s: failed to get interface: %s\n", 371 device_xname(sc->sc_dev), usbd_errstr(err)); 372 return -1; 373 } 374 375 return 0; 376 } 377 378 static int 379 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 380 { 381 int i, bin=-1, bout=-1, intr=-1, isize=0; 382 usb_interface_descriptor_t *id; 383 usb_endpoint_descriptor_t *ed; 384 385 id = usbd_get_interface_descriptor(sc->sc_iface); 386 387 for (i = 0; i < id->bNumEndpoints; i++) { 388 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 389 if (ed == NULL) { 390 aprint_error_dev(sc->sc_dev, 391 "no endpoint descriptor for %d\n", i); 392 return -1; 393 } 394 395 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 396 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 397 intr = ed->bEndpointAddress; 398 isize = UGETW(ed->wMaxPacketSize); 399 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 400 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 401 bin = ed->bEndpointAddress; 402 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 403 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 404 bout = ed->bEndpointAddress; 405 } 406 } 407 408 if (intr == -1 || bin == -1 || bout == -1) { 409 if (intr == -1) { 410 aprint_error_dev(sc->sc_dev, 411 "no interrupt end point\n"); 412 } 413 if (bin == -1) { 414 aprint_error_dev(sc->sc_dev, 415 "no data bulk in end point\n"); 416 } 417 if (bout == -1) { 418 aprint_error_dev(sc->sc_dev, 419 "no data bulk out end point\n"); 420 } 421 return -1; 422 } 423 if (isize < UCHCOM_INTR_LEAST) { 424 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 425 return -1; 426 } 427 428 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 429 device_xname(sc->sc_dev), bin, bout, intr, isize)); 430 431 endpoints->ep_intr = intr; 432 endpoints->ep_intr_size = isize; 433 endpoints->ep_bulkin = bin; 434 endpoints->ep_bulkout = bout; 435 436 return 0; 437 } 438 439 440 /* ---------------------------------------------------------------------- 441 * low level i/o 442 */ 443 444 static __inline usbd_status 445 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 446 uint16_t value, uint16_t index) 447 { 448 usb_device_request_t req; 449 450 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 451 req.bRequest = reqno; 452 USETW(req.wValue, value); 453 USETW(req.wIndex, index); 454 USETW(req.wLength, 0); 455 456 return usbd_do_request(sc->sc_udev, &req, 0); 457 } 458 459 static __inline usbd_status 460 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 461 uint16_t value, uint16_t index, void *buf, int buflen, 462 int *actlen) 463 { 464 usb_device_request_t req; 465 466 req.bmRequestType = UT_READ_VENDOR_DEVICE; 467 req.bRequest = reqno; 468 USETW(req.wValue, value); 469 USETW(req.wIndex, index); 470 USETW(req.wLength, (uint16_t)buflen); 471 472 return usbd_do_request_flags(sc->sc_udev, &req, buf, 473 USBD_SHORT_XFER_OK, actlen, 474 USBD_DEFAULT_TIMEOUT); 475 } 476 477 static __inline usbd_status 478 write_reg(struct uchcom_softc *sc, 479 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 480 { 481 DPRINTF(("%s: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 482 device_xname(sc->sc_dev), 483 (unsigned)reg1, (unsigned)val1, 484 (unsigned)reg2, (unsigned)val2)); 485 return generic_control_out( 486 sc, UCHCOM_REQ_WRITE_REG, 487 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 488 } 489 490 static __inline usbd_status 491 read_reg(struct uchcom_softc *sc, 492 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 493 { 494 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 495 usbd_status err; 496 int actin; 497 498 err = generic_control_in( 499 sc, UCHCOM_REQ_READ_REG, 500 reg1|((uint16_t)reg2<<8), 0, buf, sizeof(buf), &actin); 501 if (err) 502 return err; 503 504 DPRINTF(("%s: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 505 device_xname(sc->sc_dev), 506 (unsigned)reg1, (unsigned)buf[0], 507 (unsigned)reg2, (unsigned)buf[1])); 508 509 if (rval1) *rval1 = buf[0]; 510 if (rval2) *rval2 = buf[1]; 511 512 return USBD_NORMAL_COMPLETION; 513 } 514 515 static __inline usbd_status 516 get_version(struct uchcom_softc *sc, uint8_t *rver) 517 { 518 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 519 usbd_status err; 520 int actin; 521 522 err = generic_control_in( 523 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf), &actin); 524 if (err) 525 return err; 526 527 if (rver) *rver = buf[0]; 528 529 return USBD_NORMAL_COMPLETION; 530 } 531 532 static __inline usbd_status 533 get_status(struct uchcom_softc *sc, uint8_t *rval) 534 { 535 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 536 } 537 538 static __inline usbd_status 539 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 540 { 541 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 542 } 543 544 static __inline usbd_status 545 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 546 { 547 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 548 } 549 550 551 /* ---------------------------------------------------------------------- 552 * middle layer 553 */ 554 555 static int 556 update_version(struct uchcom_softc *sc) 557 { 558 usbd_status err; 559 560 err = get_version(sc, &sc->sc_version); 561 if (err) { 562 device_printf(sc->sc_dev, "cannot get version: %s\n", 563 usbd_errstr(err)); 564 return EIO; 565 } 566 DPRINTF(("%s: update_version %d\n", device_xname(sc->sc_dev), sc->sc_version)); 567 568 return 0; 569 } 570 571 static void 572 convert_status(struct uchcom_softc *sc, uint8_t cur) 573 { 574 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 575 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 576 577 cur = ~cur & 0x0F; 578 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 579 } 580 581 static int 582 update_status(struct uchcom_softc *sc) 583 { 584 usbd_status err; 585 uint8_t cur; 586 587 err = get_status(sc, &cur); 588 if (err) { 589 device_printf(sc->sc_dev, 590 "cannot update status: %s\n", usbd_errstr(err)); 591 return EIO; 592 } 593 convert_status(sc, cur); 594 595 return 0; 596 } 597 598 599 static int 600 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 601 { 602 usbd_status err; 603 uint8_t val = 0; 604 605 if (dtr) val |= UCHCOM_DTR_MASK; 606 if (rts) val |= UCHCOM_RTS_MASK; 607 608 if (sc->sc_version < UCHCOM_VER_20) 609 err = set_dtrrts_10(sc, ~val); 610 else 611 err = set_dtrrts_20(sc, ~val); 612 613 if (err) { 614 device_printf(sc->sc_dev, "cannot set DTR/RTS: %s\n", 615 usbd_errstr(err)); 616 return EIO; 617 } 618 619 return 0; 620 } 621 622 static int 623 set_break(struct uchcom_softc *sc, int onoff) 624 { 625 usbd_status err; 626 uint8_t brk1, brk2; 627 628 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 629 if (err) 630 return EIO; 631 if (onoff) { 632 /* on - clear bits */ 633 brk1 &= ~UCHCOM_BRK1_MASK; 634 brk2 &= ~UCHCOM_BRK2_MASK; 635 } else { 636 /* off - set bits */ 637 brk1 |= UCHCOM_BRK1_MASK; 638 brk2 |= UCHCOM_BRK2_MASK; 639 } 640 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 641 if (err) 642 return EIO; 643 644 return 0; 645 } 646 647 static int 648 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 649 { 650 int i; 651 const struct uchcom_divider_record *rp; 652 uint32_t div, rem; 653 654 /* find record */ 655 for (i=0; i<NUM_DIVIDERS; i++) { 656 if (dividers[i].dvr_high >= rate && 657 dividers[i].dvr_low <= rate) { 658 rp = ÷rs[i]; 659 goto found; 660 } 661 } 662 return -1; 663 664 found: 665 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 666 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 667 dp->dv_div = rp->dvr_divider.dv_div; 668 else { 669 div = rp->dvr_base_clock / rate; 670 rem = rp->dvr_base_clock % rate; 671 if (div==0 || div>=0xFF) 672 return -1; 673 if ((rem<<1) >= rate) 674 div += 1; 675 dp->dv_div = (uint8_t)-div; 676 } 677 678 return 0; 679 } 680 681 static int 682 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 683 { 684 usbd_status err; 685 struct uchcom_divider dv; 686 687 if (calc_divider_settings(&dv, rate)) 688 return EINVAL; 689 690 if ((err = write_reg(sc, 691 UCHCOM_REG_BPS_PRE, 692 dv.dv_prescaler | UCHCOM_BPS_PRE_IMM, 693 UCHCOM_REG_BPS_DIV, dv.dv_div))) { 694 device_printf(sc->sc_dev, "cannot set DTE rate: %s\n", 695 usbd_errstr(err)); 696 return EIO; 697 } 698 699 return 0; 700 } 701 702 static int 703 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 704 { 705 if (sc->sc_version < UCHCOM_VER_30) { 706 usbd_status err; 707 uint8_t lcr1val = 0, lcr2val = 0; 708 709 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 710 if (err) { 711 device_printf(sc->sc_dev, "cannot get LCR: %s\n", 712 usbd_errstr(err)); 713 return EIO; 714 } 715 716 lcr1val &= ~UCHCOM_LCR1_MASK; 717 lcr2val &= ~UCHCOM_LCR2_MASK; 718 719 /* 720 * XXX: it is difficult to handle the line control appropriately: 721 * - CS8, !CSTOPB and any parity mode seems ok, but 722 * - the chip doesn't have the function to calculate parity 723 * in !CS8 mode. 724 * - it is unclear that the chip supports CS5,6 mode. 725 * - it is unclear how to handle stop bits. 726 */ 727 728 switch (ISSET(cflag, CSIZE)) { 729 case CS5: 730 case CS6: 731 case CS7: 732 return EINVAL; 733 case CS8: 734 break; 735 } 736 737 if (ISSET(cflag, PARENB)) { 738 lcr1val |= UCHCOM_LCR1_PARENB; 739 if (ISSET(cflag, PARODD)) 740 lcr2val |= UCHCOM_LCR2_PARODD; 741 else 742 lcr2val |= UCHCOM_LCR2_PAREVEN; 743 } 744 745 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 746 if (err) { 747 device_printf(sc->sc_dev, "cannot set LCR: %s\n", 748 usbd_errstr(err)); 749 return EIO; 750 } 751 } 752 753 return 0; 754 } 755 756 static int 757 clear_chip(struct uchcom_softc *sc) 758 { 759 usbd_status err; 760 761 DPRINTF(("%s: clear\n", device_xname(sc->sc_dev))); 762 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 763 if (err) { 764 device_printf(sc->sc_dev, "cannot clear: %s\n", 765 usbd_errstr(err)); 766 return EIO; 767 } 768 769 return 0; 770 } 771 772 static int 773 reset_chip(struct uchcom_softc *sc) 774 { 775 usbd_status err; 776 uint8_t lcr1val, lcr2val, pre, div; 777 uint16_t val=0, idx=0; 778 779 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 780 if (err) 781 goto failed; 782 783 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 784 if (err) 785 goto failed; 786 787 val |= (uint16_t)(lcr1val&0xF0) << 8; 788 val |= 0x01; 789 val |= (uint16_t)(lcr2val&0x0F) << 8; 790 val |= 0x02; 791 idx |= pre & 0x07; 792 val |= 0x04; 793 idx |= (uint16_t)div << 8; 794 val |= 0x08; 795 val |= 0x10; 796 797 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 798 device_xname(sc->sc_dev), val, idx)); 799 800 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 801 if (err) 802 goto failed; 803 804 return 0; 805 806 failed: 807 printf("%s: cannot reset: %s\n", 808 device_xname(sc->sc_dev), usbd_errstr(err)); 809 return EIO; 810 } 811 812 static int 813 setup_comm(struct uchcom_softc *sc) 814 { 815 int ret; 816 817 ret = update_version(sc); 818 if (ret) 819 return ret; 820 821 ret = clear_chip(sc); 822 if (ret) 823 return ret; 824 825 ret = set_dte_rate(sc, TTYDEF_SPEED); 826 if (ret) 827 return ret; 828 829 ret = set_line_control(sc, CS8); 830 if (ret) 831 return ret; 832 833 ret = update_status(sc); 834 if (ret) 835 return ret; 836 837 ret = reset_chip(sc); 838 if (ret) 839 return ret; 840 841 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 842 if (ret) 843 return ret; 844 845 sc->sc_dtr = sc->sc_rts = 1; 846 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 847 if (ret) 848 return ret; 849 850 return 0; 851 } 852 853 static int 854 setup_intr_pipe(struct uchcom_softc *sc) 855 { 856 usbd_status err; 857 858 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 859 sc->sc_intr_buf = kmem_alloc(sc->sc_intr_size, KM_SLEEP); 860 err = usbd_open_pipe_intr(sc->sc_iface, 861 sc->sc_intr_endpoint, 862 USBD_SHORT_XFER_OK, 863 &sc->sc_intr_pipe, sc, 864 sc->sc_intr_buf, 865 sc->sc_intr_size, 866 uchcom_intr, USBD_DEFAULT_INTERVAL); 867 if (err) { 868 device_printf(sc->sc_dev, 869 "cannot open interrupt pipe: %s\n", 870 usbd_errstr(err)); 871 return EIO; 872 } 873 } 874 return 0; 875 } 876 877 static void 878 close_intr_pipe(struct uchcom_softc *sc) 879 { 880 usbd_status err; 881 882 if (sc->sc_dying) 883 return; 884 885 if (sc->sc_intr_pipe != NULL) { 886 err = usbd_abort_pipe(sc->sc_intr_pipe); 887 if (err) 888 device_printf(sc->sc_dev, 889 "abort interrupt pipe failed: %s\n", 890 usbd_errstr(err)); 891 err = usbd_close_pipe(sc->sc_intr_pipe); 892 if (err) 893 device_printf(sc->sc_dev, 894 "close interrupt pipe failed: %s\n", 895 usbd_errstr(err)); 896 kmem_free(sc->sc_intr_buf, sc->sc_intr_size); 897 sc->sc_intr_pipe = NULL; 898 } 899 } 900 901 902 /* ---------------------------------------------------------------------- 903 * methods for ucom 904 */ 905 void 906 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 907 { 908 struct uchcom_softc *sc = arg; 909 910 if (sc->sc_dying) 911 return; 912 913 *rlsr = sc->sc_lsr; 914 *rmsr = sc->sc_msr; 915 } 916 917 void 918 uchcom_set(void *arg, int portno, int reg, int onoff) 919 { 920 struct uchcom_softc *sc = arg; 921 922 if (sc->sc_dying) 923 return; 924 925 switch (reg) { 926 case UCOM_SET_DTR: 927 sc->sc_dtr = !!onoff; 928 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 929 break; 930 case UCOM_SET_RTS: 931 sc->sc_rts = !!onoff; 932 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 933 break; 934 case UCOM_SET_BREAK: 935 set_break(sc, onoff); 936 break; 937 } 938 } 939 940 int 941 uchcom_param(void *arg, int portno, struct termios *t) 942 { 943 struct uchcom_softc *sc = arg; 944 int ret; 945 946 if (sc->sc_dying) 947 return 0; 948 949 ret = set_line_control(sc, t->c_cflag); 950 if (ret) 951 return ret; 952 953 ret = set_dte_rate(sc, t->c_ospeed); 954 if (ret) 955 return ret; 956 957 return 0; 958 } 959 960 int 961 uchcom_open(void *arg, int portno) 962 { 963 int ret; 964 struct uchcom_softc *sc = arg; 965 966 if (sc->sc_dying) 967 return EIO; 968 969 ret = setup_intr_pipe(sc); 970 if (ret) 971 return ret; 972 973 ret = setup_comm(sc); 974 if (ret) 975 return ret; 976 977 return 0; 978 } 979 980 void 981 uchcom_close(void *arg, int portno) 982 { 983 struct uchcom_softc *sc = arg; 984 985 if (sc->sc_dying) 986 return; 987 988 close_intr_pipe(sc); 989 } 990 991 992 /* ---------------------------------------------------------------------- 993 * callback when the modem status is changed. 994 */ 995 void 996 uchcom_intr(struct usbd_xfer *xfer, void * priv, 997 usbd_status status) 998 { 999 struct uchcom_softc *sc = priv; 1000 u_char *buf = sc->sc_intr_buf; 1001 1002 if (sc->sc_dying) 1003 return; 1004 1005 if (status != USBD_NORMAL_COMPLETION) { 1006 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1007 return; 1008 1009 DPRINTF(("%s: abnormal status: %s\n", 1010 device_xname(sc->sc_dev), usbd_errstr(status))); 1011 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1012 return; 1013 } 1014 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1015 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1016 device_xname(sc->sc_dev), 1017 (unsigned)buf[0], (unsigned)buf[1], 1018 (unsigned)buf[2], (unsigned)buf[3], 1019 (unsigned)buf[4], (unsigned)buf[5], 1020 (unsigned)buf[6], (unsigned)buf[7])); 1021 1022 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1023 ucom_status_change(device_private(sc->sc_subdev)); 1024 } 1025
Indexes created Tue Sep 23 14:10:03 GMT 2025