uchcom.c revision 1.5.2.1
1 /* $NetBSD: uchcom.c,v 1.5.2.1 2008/06/23 04:31:36 wrstuden 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 1.5.2.1 2008/06/23 04:31:36 wrstuden 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 #include <sys/workqueue.h> 52 53 #include <dev/usb/usb.h> 54 #include <dev/usb/usbcdc.h> 55 56 #include <dev/usb/usbdi.h> 57 #include <dev/usb/usbdi_util.h> 58 #include <dev/usb/usbdevs.h> 59 #include <dev/usb/usb_quirks.h> 60 61 #include <dev/usb/ucomvar.h> 62 63 #ifdef UCHCOM_DEBUG 64 #define DPRINTFN(n, x) if (uchcomdebug > (n)) logprintf x 65 int uchcomdebug = 0; 66 #else 67 #define DPRINTFN(n, x) 68 #endif 69 #define DPRINTF(x) DPRINTFN(0, x) 70 71 #define UCHCOM_IFACE_INDEX 0 72 #define UCHCOM_CONFIG_INDEX 0 73 74 #define UCHCOM_REV_CH340 0x0250 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_BPS_MOD 0x14 88 #define UCHCOM_REG_BPS_PAD 0x0F 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 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 USBBASEDEVICE sc_dev; 124 usbd_device_handle sc_udev; 125 device_ptr_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 }; 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(usbd_xfer_handle, usbd_private_handle, 188 usbd_status); 189 190 static int set_config(struct uchcom_softc *); 191 static int find_ifaces(struct uchcom_softc *, usbd_interface_handle *); 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 USB_MATCH(uchcom) 230 { 231 USB_MATCH_START(uchcom, uaa); 232 233 return (uchcom_lookup(uaa->vendor, uaa->product) != NULL ? 234 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 235 } 236 237 USB_ATTACH(uchcom) 238 { 239 USB_ATTACH_START(uchcom, sc, uaa); 240 usbd_device_handle dev = uaa->device; 241 char *devinfop; 242 struct uchcom_endpoints endpoints; 243 struct ucom_attach_args uca; 244 245 devinfop = usbd_devinfo_alloc(dev, 0); 246 USB_ATTACH_SETUP; 247 aprint_normal_dev(self, "%s\n", devinfop); 248 usbd_devinfo_free(devinfop); 249 250 sc->sc_dev = self; 251 sc->sc_udev = dev; 252 sc->sc_dying = 0; 253 sc->sc_dtr = sc->sc_rts = -1; 254 sc->sc_lsr = sc->sc_msr = 0; 255 256 DPRINTF(("\n\nuchcom attach: sc=%p\n", sc)); 257 258 if (set_config(sc)) 259 goto failed; 260 261 switch (uaa->release) { 262 case UCHCOM_REV_CH340: 263 aprint_normal_dev(self, "CH340 detected\n"); 264 break; 265 default: 266 aprint_normal_dev(self, "CH341 detected\n"); 267 break; 268 } 269 270 if (find_ifaces(sc, &sc->sc_iface)) 271 goto failed; 272 273 if (find_endpoints(sc, &endpoints)) 274 goto failed; 275 276 sc->sc_intr_endpoint = endpoints.ep_intr; 277 sc->sc_intr_size = endpoints.ep_intr_size; 278 279 /* setup ucom layer */ 280 uca.portno = UCOM_UNK_PORTNO; 281 uca.bulkin = endpoints.ep_bulkin; 282 uca.bulkout = endpoints.ep_bulkout; 283 uca.ibufsize = UCHCOMIBUFSIZE; 284 uca.obufsize = UCHCOMOBUFSIZE; 285 uca.ibufsizepad = UCHCOMIBUFSIZE; 286 uca.opkthdrlen = 0; 287 uca.device = dev; 288 uca.iface = sc->sc_iface; 289 uca.methods = &uchcom_methods; 290 uca.arg = sc; 291 uca.info = NULL; 292 293 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 294 USBDEV(sc->sc_dev)); 295 296 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &uca, 297 ucomprint, ucomsubmatch); 298 299 USB_ATTACH_SUCCESS_RETURN; 300 301 failed: 302 sc->sc_dying = 1; 303 USB_ATTACH_ERROR_RETURN; 304 } 305 306 void 307 uchcom_childdet(device_t self, device_t child) 308 { 309 struct uchcom_softc *sc = device_private(self); 310 311 KASSERT(sc->sc_subdev == child); 312 sc->sc_subdev = NULL; 313 } 314 315 USB_DETACH(uchcom) 316 { 317 USB_DETACH_START(uchcom, sc); 318 int rv = 0; 319 320 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 321 322 close_intr_pipe(sc); 323 324 sc->sc_dying = 1; 325 326 if (sc->sc_subdev != NULL) 327 rv = config_detach(sc->sc_subdev, flags); 328 329 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 330 USBDEV(sc->sc_dev)); 331 332 return rv; 333 } 334 335 int 336 uchcom_activate(device_t self, enum devact act) 337 { 338 struct uchcom_softc *sc = device_private(self); 339 int rv = 0; 340 341 switch (act) { 342 case DVACT_ACTIVATE: 343 rv = EOPNOTSUPP; 344 break; 345 case DVACT_DEACTIVATE: 346 close_intr_pipe(sc); 347 sc->sc_dying = 1; 348 if (sc->sc_subdev != NULL) 349 rv = config_deactivate(sc->sc_subdev); 350 break; 351 } 352 return rv; 353 } 354 355 static int 356 set_config(struct uchcom_softc *sc) 357 { 358 usbd_status err; 359 360 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 361 if (err) { 362 aprint_error_dev(sc->sc_dev, 363 "failed to set configuration: %s\n", usbd_errstr(err)); 364 return -1; 365 } 366 367 return 0; 368 } 369 370 static int 371 find_ifaces(struct uchcom_softc *sc, usbd_interface_handle *riface) 372 { 373 usbd_status err; 374 375 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 376 riface); 377 if (err) { 378 aprint_error("\n%s: failed to get interface: %s\n", 379 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 380 return -1; 381 } 382 383 return 0; 384 } 385 386 static int 387 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 388 { 389 int i, bin=-1, bout=-1, intr=-1, isize=0; 390 usb_interface_descriptor_t *id; 391 usb_endpoint_descriptor_t *ed; 392 393 id = usbd_get_interface_descriptor(sc->sc_iface); 394 395 for (i = 0; i < id->bNumEndpoints; i++) { 396 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 397 if (ed == NULL) { 398 aprint_error_dev(sc->sc_dev, 399 "no endpoint descriptor for %d\n", i); 400 return -1; 401 } 402 403 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 404 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 405 intr = ed->bEndpointAddress; 406 isize = UGETW(ed->wMaxPacketSize); 407 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 408 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 409 bin = ed->bEndpointAddress; 410 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 411 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 412 bout = ed->bEndpointAddress; 413 } 414 } 415 416 if (intr == -1 || bin == -1 || bout == -1) { 417 if (intr == -1) { 418 aprint_error_dev(sc->sc_dev, 419 "no interrupt end point\n"); 420 } 421 if (bin == -1) { 422 aprint_error_dev(sc->sc_dev, 423 "no data bulk in end point\n"); 424 } 425 if (bout == -1) { 426 aprint_error_dev(sc->sc_dev, 427 "no data bulk out end point\n"); 428 } 429 return -1; 430 } 431 if (isize < UCHCOM_INTR_LEAST) { 432 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 433 return -1; 434 } 435 436 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 437 USBDEVNAME(sc->sc_dev), bin, bout, intr, isize)); 438 439 endpoints->ep_intr = intr; 440 endpoints->ep_intr_size = isize; 441 endpoints->ep_bulkin = bin; 442 endpoints->ep_bulkout = bout; 443 444 return 0; 445 } 446 447 448 /* ---------------------------------------------------------------------- 449 * low level i/o 450 */ 451 452 static __inline usbd_status 453 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 454 uint16_t value, uint16_t index) 455 { 456 usb_device_request_t req; 457 458 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 459 req.bRequest = reqno; 460 USETW(req.wValue, value); 461 USETW(req.wIndex, index); 462 USETW(req.wLength, 0); 463 464 return usbd_do_request(sc->sc_udev, &req, 0); 465 } 466 467 static __inline usbd_status 468 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 469 uint16_t value, uint16_t index, void *buf, int buflen, 470 int *actlen) 471 { 472 usb_device_request_t req; 473 474 req.bmRequestType = UT_READ_VENDOR_DEVICE; 475 req.bRequest = reqno; 476 USETW(req.wValue, value); 477 USETW(req.wIndex, index); 478 USETW(req.wLength, (uint16_t)buflen); 479 480 return usbd_do_request_flags(sc->sc_udev, &req, buf, 481 USBD_SHORT_XFER_OK, actlen, 482 USBD_DEFAULT_TIMEOUT); 483 } 484 485 static __inline usbd_status 486 write_reg(struct uchcom_softc *sc, 487 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 488 { 489 DPRINTF(("uchcom: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 490 (unsigned)reg1, (unsigned)val1, 491 (unsigned)reg2, (unsigned)val2)); 492 return generic_control_out( 493 sc, UCHCOM_REQ_WRITE_REG, 494 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 495 } 496 497 static __inline usbd_status 498 read_reg(struct uchcom_softc *sc, 499 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 500 { 501 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 502 usbd_status err; 503 int actin; 504 505 err = generic_control_in( 506 sc, UCHCOM_REQ_READ_REG, 507 reg1|((uint16_t)reg2<<8), 0, buf, sizeof buf, &actin); 508 if (err) 509 return err; 510 511 DPRINTF(("uchcom: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 512 (unsigned)reg1, (unsigned)buf[0], 513 (unsigned)reg2, (unsigned)buf[1])); 514 515 if (rval1) *rval1 = buf[0]; 516 if (rval2) *rval2 = buf[1]; 517 518 return USBD_NORMAL_COMPLETION; 519 } 520 521 static __inline usbd_status 522 get_version(struct uchcom_softc *sc, uint8_t *rver) 523 { 524 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 525 usbd_status err; 526 int actin; 527 528 err = generic_control_in( 529 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof buf, &actin); 530 if (err) 531 return err; 532 533 if (rver) *rver = buf[0]; 534 535 return USBD_NORMAL_COMPLETION; 536 } 537 538 static __inline usbd_status 539 get_status(struct uchcom_softc *sc, uint8_t *rval) 540 { 541 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 542 } 543 544 static __inline usbd_status 545 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 546 { 547 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 548 } 549 550 static __inline usbd_status 551 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 552 { 553 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 554 } 555 556 557 /* ---------------------------------------------------------------------- 558 * middle layer 559 */ 560 561 static int 562 update_version(struct uchcom_softc *sc) 563 { 564 usbd_status err; 565 566 err = get_version(sc, &sc->sc_version); 567 if (err) { 568 aprint_error_dev(sc->sc_dev, "cannot get version: %s\n", 569 usbd_errstr(err)); 570 return EIO; 571 } 572 573 return 0; 574 } 575 576 static void 577 convert_status(struct uchcom_softc *sc, uint8_t cur) 578 { 579 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 580 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 581 582 cur = ~cur & 0x0F; 583 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 584 } 585 586 static int 587 update_status(struct uchcom_softc *sc) 588 { 589 usbd_status err; 590 uint8_t cur; 591 592 err = get_status(sc, &cur); 593 if (err) { 594 aprint_error_dev(sc->sc_dev, 595 "cannot update status: %s\n", usbd_errstr(err)); 596 return EIO; 597 } 598 convert_status(sc, cur); 599 600 return 0; 601 } 602 603 604 static int 605 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 606 { 607 usbd_status err; 608 uint8_t val = 0; 609 610 if (dtr) val |= UCHCOM_DTR_MASK; 611 if (rts) val |= UCHCOM_RTS_MASK; 612 613 if (sc->sc_version < UCHCOM_VER_20) 614 err = set_dtrrts_10(sc, ~val); 615 else 616 err = set_dtrrts_20(sc, ~val); 617 618 if (err) { 619 aprint_error_dev(sc->sc_dev, "cannot set DTR/RTS: %s\n", 620 usbd_errstr(err)); 621 return EIO; 622 } 623 624 return 0; 625 } 626 627 static int 628 set_break(struct uchcom_softc *sc, int onoff) 629 { 630 usbd_status err; 631 uint8_t brk1, brk2; 632 633 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 634 if (err) 635 return EIO; 636 if (onoff) { 637 /* on - clear bits */ 638 brk1 &= ~UCHCOM_BRK1_MASK; 639 brk2 &= ~UCHCOM_BRK2_MASK; 640 } else { 641 /* off - set bits */ 642 brk1 |= UCHCOM_BRK1_MASK; 643 brk2 |= UCHCOM_BRK2_MASK; 644 } 645 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 646 if (err) 647 return EIO; 648 649 return 0; 650 } 651 652 static int 653 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 654 { 655 int i; 656 const struct uchcom_divider_record *rp; 657 uint32_t div, rem, mod; 658 659 /* find record */ 660 for (i=0; i<NUM_DIVIDERS; i++) { 661 if (dividers[i].dvr_high >= rate && 662 dividers[i].dvr_low <= rate) { 663 rp = ÷rs[i]; 664 goto found; 665 } 666 } 667 return -1; 668 669 found: 670 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 671 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 672 dp->dv_div = rp->dvr_divider.dv_div; 673 else { 674 div = rp->dvr_base_clock / rate; 675 rem = rp->dvr_base_clock % rate; 676 if (div==0 || div>=0xFF) 677 return -1; 678 if ((rem<<1) >= rate) 679 div += 1; 680 dp->dv_div = (uint8_t)-div; 681 } 682 683 mod = UCHCOM_BPS_MOD_BASE/rate + UCHCOM_BPS_MOD_BASE_OFS; 684 mod = mod + mod/2; 685 686 dp->dv_mod = mod / 0x100; 687 688 return 0; 689 } 690 691 static int 692 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 693 { 694 usbd_status err; 695 struct uchcom_divider dv; 696 697 if (calc_divider_settings(&dv, rate)) 698 return EINVAL; 699 700 if ((err = write_reg(sc, 701 UCHCOM_REG_BPS_PRE, dv.dv_prescaler, 702 UCHCOM_REG_BPS_DIV, dv.dv_div)) || 703 (err = write_reg(sc, 704 UCHCOM_REG_BPS_MOD, dv.dv_mod, 705 UCHCOM_REG_BPS_PAD, 0))) { 706 aprint_error_dev(sc->sc_dev, "cannot set DTE rate: %s\n", 707 usbd_errstr(err)); 708 return EIO; 709 } 710 711 return 0; 712 } 713 714 static int 715 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 716 { 717 usbd_status err; 718 uint8_t lcr1val = 0, lcr2val = 0; 719 720 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 721 if (err) { 722 aprint_error_dev(sc->sc_dev, "cannot get LCR: %s\n", 723 usbd_errstr(err)); 724 return EIO; 725 } 726 727 lcr1val &= ~UCHCOM_LCR1_MASK; 728 lcr2val &= ~UCHCOM_LCR2_MASK; 729 730 /* 731 * XXX: it is difficult to handle the line control appropriately: 732 * - CS8, !CSTOPB and any parity mode seems ok, but 733 * - the chip doesn't have the function to calculate parity 734 * in !CS8 mode. 735 * - it is unclear that the chip supports CS5,6 mode. 736 * - it is unclear how to handle stop bits. 737 */ 738 739 switch (ISSET(cflag, CSIZE)) { 740 case CS5: 741 case CS6: 742 case CS7: 743 return EINVAL; 744 case CS8: 745 break; 746 } 747 748 if (ISSET(cflag, PARENB)) { 749 lcr1val |= UCHCOM_LCR1_PARENB; 750 if (ISSET(cflag, PARODD)) 751 lcr2val |= UCHCOM_LCR2_PARODD; 752 else 753 lcr2val |= UCHCOM_LCR2_PAREVEN; 754 } 755 756 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 757 if (err) { 758 aprint_error_dev(sc->sc_dev, "cannot set LCR: %s\n", 759 usbd_errstr(err)); 760 return EIO; 761 } 762 763 return 0; 764 } 765 766 static int 767 clear_chip(struct uchcom_softc *sc) 768 { 769 usbd_status err; 770 771 DPRINTF(("%s: clear\n", USBDEVNAME(sc->sc_dev))); 772 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 773 if (err) { 774 aprint_error_dev(sc->sc_dev, "cannot clear: %s\n", 775 usbd_errstr(err)); 776 return EIO; 777 } 778 779 return 0; 780 } 781 782 static int 783 reset_chip(struct uchcom_softc *sc) 784 { 785 usbd_status err; 786 uint8_t lcr1val, lcr2val, pre, div, mod; 787 uint16_t val=0, idx=0; 788 789 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 790 if (err) 791 goto failed; 792 793 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 794 if (err) 795 goto failed; 796 797 err = read_reg(sc, UCHCOM_REG_BPS_MOD, &mod, UCHCOM_REG_BPS_PAD, NULL); 798 if (err) 799 goto failed; 800 801 val |= (uint16_t)(lcr1val&0xF0) << 8; 802 val |= 0x01; 803 val |= (uint16_t)(lcr2val&0x0F) << 8; 804 val |= 0x02; 805 idx |= pre & 0x07; 806 val |= 0x04; 807 idx |= (uint16_t)div << 8; 808 val |= 0x08; 809 idx |= mod & 0xF8; 810 val |= 0x10; 811 812 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 813 USBDEVNAME(sc->sc_dev), val, idx)); 814 815 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 816 if (err) 817 goto failed; 818 819 return 0; 820 821 failed: 822 printf("%s: cannot reset: %s\n", 823 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 824 return EIO; 825 } 826 827 static int 828 setup_comm(struct uchcom_softc *sc) 829 { 830 int ret; 831 832 ret = update_version(sc); 833 if (ret) 834 return ret; 835 836 ret = clear_chip(sc); 837 if (ret) 838 return ret; 839 840 ret = set_dte_rate(sc, TTYDEF_SPEED); 841 if (ret) 842 return ret; 843 844 ret = set_line_control(sc, CS8); 845 if (ret) 846 return ret; 847 848 ret = update_status(sc); 849 if (ret) 850 return ret; 851 852 ret = reset_chip(sc); 853 if (ret) 854 return ret; 855 856 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 857 if (ret) 858 return ret; 859 860 sc->sc_dtr = sc->sc_rts = 1; 861 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 862 if (ret) 863 return ret; 864 865 return 0; 866 } 867 868 static int 869 setup_intr_pipe(struct uchcom_softc *sc) 870 { 871 usbd_status err; 872 873 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 874 sc->sc_intr_buf = malloc(sc->sc_intr_size, M_USBDEV, M_WAITOK); 875 err = usbd_open_pipe_intr(sc->sc_iface, 876 sc->sc_intr_endpoint, 877 USBD_SHORT_XFER_OK, 878 &sc->sc_intr_pipe, sc, 879 sc->sc_intr_buf, 880 sc->sc_intr_size, 881 uchcom_intr, USBD_DEFAULT_INTERVAL); 882 if (err) { 883 aprint_error_dev(sc->sc_dev, 884 "cannot open interrupt pipe: %s\n", 885 usbd_errstr(err)); 886 return EIO; 887 } 888 } 889 return 0; 890 } 891 892 static void 893 close_intr_pipe(struct uchcom_softc *sc) 894 { 895 usbd_status err; 896 897 if (sc->sc_dying) 898 return; 899 900 if (sc->sc_intr_pipe != NULL) { 901 err = usbd_abort_pipe(sc->sc_intr_pipe); 902 if (err) 903 aprint_error_dev(sc->sc_dev, 904 "abort interrupt pipe failed: %s\n", 905 usbd_errstr(err)); 906 err = usbd_close_pipe(sc->sc_intr_pipe); 907 if (err) 908 aprint_error_dev(sc->sc_dev, 909 "close interrupt pipe failed: %s\n", 910 usbd_errstr(err)); 911 free(sc->sc_intr_buf, M_USBDEV); 912 sc->sc_intr_pipe = NULL; 913 } 914 } 915 916 917 /* ---------------------------------------------------------------------- 918 * methods for ucom 919 */ 920 void 921 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 922 { 923 struct uchcom_softc *sc = arg; 924 925 if (sc->sc_dying) 926 return; 927 928 *rlsr = sc->sc_lsr; 929 *rmsr = sc->sc_msr; 930 } 931 932 void 933 uchcom_set(void *arg, int portno, int reg, int onoff) 934 { 935 struct uchcom_softc *sc = arg; 936 937 if (sc->sc_dying) 938 return; 939 940 switch (reg) { 941 case UCOM_SET_DTR: 942 sc->sc_dtr = !!onoff; 943 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 944 break; 945 case UCOM_SET_RTS: 946 sc->sc_rts = !!onoff; 947 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 948 break; 949 case UCOM_SET_BREAK: 950 set_break(sc, onoff); 951 break; 952 } 953 } 954 955 int 956 uchcom_param(void *arg, int portno, struct termios *t) 957 { 958 struct uchcom_softc *sc = arg; 959 int ret; 960 961 if (sc->sc_dying) 962 return 0; 963 964 ret = set_line_control(sc, t->c_cflag); 965 if (ret) 966 return ret; 967 968 ret = set_dte_rate(sc, t->c_ospeed); 969 if (ret) 970 return ret; 971 972 return 0; 973 } 974 975 int 976 uchcom_open(void *arg, int portno) 977 { 978 int ret; 979 struct uchcom_softc *sc = arg; 980 981 if (sc->sc_dying) 982 return EIO; 983 984 ret = setup_intr_pipe(sc); 985 if (ret) 986 return ret; 987 988 ret = setup_comm(sc); 989 if (ret) 990 return ret; 991 992 return 0; 993 } 994 995 void 996 uchcom_close(void *arg, int portno) 997 { 998 struct uchcom_softc *sc = arg; 999 1000 if (sc->sc_dying) 1001 return; 1002 1003 close_intr_pipe(sc); 1004 } 1005 1006 1007 /* ---------------------------------------------------------------------- 1008 * callback when the modem status is changed. 1009 */ 1010 void 1011 uchcom_intr(usbd_xfer_handle xfer, usbd_private_handle priv, 1012 usbd_status status) 1013 { 1014 struct uchcom_softc *sc = priv; 1015 u_char *buf = sc->sc_intr_buf; 1016 1017 if (sc->sc_dying) 1018 return; 1019 1020 if (status != USBD_NORMAL_COMPLETION) { 1021 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1022 return; 1023 1024 DPRINTF(("%s: abnormal status: %s\n", 1025 USBDEVNAME(sc->sc_dev), usbd_errstr(status))); 1026 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1027 return; 1028 } 1029 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1030 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1031 USBDEVNAME(sc->sc_dev), 1032 (unsigned)buf[0], (unsigned)buf[1], 1033 (unsigned)buf[2], (unsigned)buf[3], 1034 (unsigned)buf[4], (unsigned)buf[5], 1035 (unsigned)buf[6], (unsigned)buf[7])); 1036 1037 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1038 ucom_status_change(device_private(sc->sc_subdev)); 1039 } 1040
Indexes created Sat Oct 11 08:10:02 GMT 2025