uchcom.c revision 1.3.4.3
1 /* $NetBSD: uchcom.c,v 1.3.4.3 2010/03/11 15:04:06 yamt 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 1.3.4.3 2010/03/11 15:04:06 yamt 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 { USB_VENDOR_WINCHIPHEAD2, USB_PRODUCT_WINCHIPHEAD2_CH341 }, 180 }; 181 #define uchcom_lookup(v, p) usb_lookup(uchcom_devs, v, p) 182 183 Static void uchcom_get_status(void *, int, u_char *, u_char *); 184 Static void uchcom_set(void *, int, int, int); 185 Static int uchcom_param(void *, int, struct termios *); 186 Static int uchcom_open(void *, int); 187 Static void uchcom_close(void *, int); 188 Static void uchcom_intr(usbd_xfer_handle, usbd_private_handle, 189 usbd_status); 190 191 static int set_config(struct uchcom_softc *); 192 static int find_ifaces(struct uchcom_softc *, usbd_interface_handle *); 193 static int find_endpoints(struct uchcom_softc *, 194 struct uchcom_endpoints *); 195 static void close_intr_pipe(struct uchcom_softc *); 196 197 198 struct ucom_methods uchcom_methods = { 199 .ucom_get_status = uchcom_get_status, 200 .ucom_set = uchcom_set, 201 .ucom_param = uchcom_param, 202 .ucom_ioctl = NULL, 203 .ucom_open = uchcom_open, 204 .ucom_close = uchcom_close, 205 .ucom_read = NULL, 206 .ucom_write = NULL, 207 }; 208 209 int uchcom_match(device_t, cfdata_t, void *); 210 void uchcom_attach(device_t, device_t, void *); 211 void uchcom_childdet(device_t, device_t); 212 int uchcom_detach(device_t, int); 213 int uchcom_activate(device_t, enum devact); 214 215 extern struct cfdriver uchcom_cd; 216 217 CFATTACH_DECL2_NEW(uchcom, 218 sizeof(struct uchcom_softc), 219 uchcom_match, 220 uchcom_attach, 221 uchcom_detach, 222 uchcom_activate, 223 NULL, 224 uchcom_childdet); 225 226 /* ---------------------------------------------------------------------- 227 * driver entry points 228 */ 229 230 USB_MATCH(uchcom) 231 { 232 USB_MATCH_START(uchcom, uaa); 233 234 return (uchcom_lookup(uaa->vendor, uaa->product) != NULL ? 235 UMATCH_VENDOR_PRODUCT : UMATCH_NONE); 236 } 237 238 USB_ATTACH(uchcom) 239 { 240 USB_ATTACH_START(uchcom, sc, uaa); 241 usbd_device_handle dev = uaa->device; 242 char *devinfop; 243 struct uchcom_endpoints endpoints; 244 struct ucom_attach_args uca; 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 switch (uaa->release) { 265 case UCHCOM_REV_CH340: 266 aprint_normal_dev(self, "CH340 detected\n"); 267 break; 268 default: 269 aprint_normal_dev(self, "CH341 detected\n"); 270 break; 271 } 272 273 if (find_ifaces(sc, &sc->sc_iface)) 274 goto failed; 275 276 if (find_endpoints(sc, &endpoints)) 277 goto failed; 278 279 sc->sc_intr_endpoint = endpoints.ep_intr; 280 sc->sc_intr_size = endpoints.ep_intr_size; 281 282 /* setup ucom layer */ 283 uca.portno = UCOM_UNK_PORTNO; 284 uca.bulkin = endpoints.ep_bulkin; 285 uca.bulkout = endpoints.ep_bulkout; 286 uca.ibufsize = UCHCOMIBUFSIZE; 287 uca.obufsize = UCHCOMOBUFSIZE; 288 uca.ibufsizepad = UCHCOMIBUFSIZE; 289 uca.opkthdrlen = 0; 290 uca.device = dev; 291 uca.iface = sc->sc_iface; 292 uca.methods = &uchcom_methods; 293 uca.arg = sc; 294 uca.info = NULL; 295 296 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 297 USBDEV(sc->sc_dev)); 298 299 sc->sc_subdev = config_found_sm_loc(self, "ucombus", NULL, &uca, 300 ucomprint, ucomsubmatch); 301 302 USB_ATTACH_SUCCESS_RETURN; 303 304 failed: 305 sc->sc_dying = 1; 306 USB_ATTACH_ERROR_RETURN; 307 } 308 309 void 310 uchcom_childdet(device_t self, device_t child) 311 { 312 struct uchcom_softc *sc = device_private(self); 313 314 KASSERT(sc->sc_subdev == child); 315 sc->sc_subdev = NULL; 316 } 317 318 USB_DETACH(uchcom) 319 { 320 USB_DETACH_START(uchcom, sc); 321 int rv = 0; 322 323 DPRINTF(("uchcom_detach: sc=%p flags=%d\n", sc, flags)); 324 325 close_intr_pipe(sc); 326 327 sc->sc_dying = 1; 328 329 if (sc->sc_subdev != NULL) 330 rv = config_detach(sc->sc_subdev, flags); 331 332 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 333 USBDEV(sc->sc_dev)); 334 335 return rv; 336 } 337 338 int 339 uchcom_activate(device_t self, enum devact act) 340 { 341 struct uchcom_softc *sc = device_private(self); 342 343 switch (act) { 344 case DVACT_DEACTIVATE: 345 close_intr_pipe(sc); 346 sc->sc_dying = 1; 347 return 0; 348 default: 349 return EOPNOTSUPP; 350 } 351 } 352 353 static int 354 set_config(struct uchcom_softc *sc) 355 { 356 usbd_status err; 357 358 err = usbd_set_config_index(sc->sc_udev, UCHCOM_CONFIG_INDEX, 1); 359 if (err) { 360 aprint_error_dev(sc->sc_dev, 361 "failed to set configuration: %s\n", usbd_errstr(err)); 362 return -1; 363 } 364 365 return 0; 366 } 367 368 static int 369 find_ifaces(struct uchcom_softc *sc, usbd_interface_handle *riface) 370 { 371 usbd_status err; 372 373 err = usbd_device2interface_handle(sc->sc_udev, UCHCOM_IFACE_INDEX, 374 riface); 375 if (err) { 376 aprint_error("\n%s: failed to get interface: %s\n", 377 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 378 return -1; 379 } 380 381 return 0; 382 } 383 384 static int 385 find_endpoints(struct uchcom_softc *sc, struct uchcom_endpoints *endpoints) 386 { 387 int i, bin=-1, bout=-1, intr=-1, isize=0; 388 usb_interface_descriptor_t *id; 389 usb_endpoint_descriptor_t *ed; 390 391 id = usbd_get_interface_descriptor(sc->sc_iface); 392 393 for (i = 0; i < id->bNumEndpoints; i++) { 394 ed = usbd_interface2endpoint_descriptor(sc->sc_iface, i); 395 if (ed == NULL) { 396 aprint_error_dev(sc->sc_dev, 397 "no endpoint descriptor for %d\n", i); 398 return -1; 399 } 400 401 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 402 UE_GET_XFERTYPE(ed->bmAttributes) == UE_INTERRUPT) { 403 intr = ed->bEndpointAddress; 404 isize = UGETW(ed->wMaxPacketSize); 405 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN && 406 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 407 bin = ed->bEndpointAddress; 408 } else if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT && 409 UE_GET_XFERTYPE(ed->bmAttributes) == UE_BULK) { 410 bout = ed->bEndpointAddress; 411 } 412 } 413 414 if (intr == -1 || bin == -1 || bout == -1) { 415 if (intr == -1) { 416 aprint_error_dev(sc->sc_dev, 417 "no interrupt end point\n"); 418 } 419 if (bin == -1) { 420 aprint_error_dev(sc->sc_dev, 421 "no data bulk in end point\n"); 422 } 423 if (bout == -1) { 424 aprint_error_dev(sc->sc_dev, 425 "no data bulk out end point\n"); 426 } 427 return -1; 428 } 429 if (isize < UCHCOM_INTR_LEAST) { 430 aprint_error_dev(sc->sc_dev, "intr pipe is too short\n"); 431 return -1; 432 } 433 434 DPRINTF(("%s: bulkin=%d, bulkout=%d, intr=%d, isize=%d\n", 435 USBDEVNAME(sc->sc_dev), bin, bout, intr, isize)); 436 437 endpoints->ep_intr = intr; 438 endpoints->ep_intr_size = isize; 439 endpoints->ep_bulkin = bin; 440 endpoints->ep_bulkout = bout; 441 442 return 0; 443 } 444 445 446 /* ---------------------------------------------------------------------- 447 * low level i/o 448 */ 449 450 static __inline usbd_status 451 generic_control_out(struct uchcom_softc *sc, uint8_t reqno, 452 uint16_t value, uint16_t index) 453 { 454 usb_device_request_t req; 455 456 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 457 req.bRequest = reqno; 458 USETW(req.wValue, value); 459 USETW(req.wIndex, index); 460 USETW(req.wLength, 0); 461 462 return usbd_do_request(sc->sc_udev, &req, 0); 463 } 464 465 static __inline usbd_status 466 generic_control_in(struct uchcom_softc *sc, uint8_t reqno, 467 uint16_t value, uint16_t index, void *buf, int buflen, 468 int *actlen) 469 { 470 usb_device_request_t req; 471 472 req.bmRequestType = UT_READ_VENDOR_DEVICE; 473 req.bRequest = reqno; 474 USETW(req.wValue, value); 475 USETW(req.wIndex, index); 476 USETW(req.wLength, (uint16_t)buflen); 477 478 return usbd_do_request_flags(sc->sc_udev, &req, buf, 479 USBD_SHORT_XFER_OK, actlen, 480 USBD_DEFAULT_TIMEOUT); 481 } 482 483 static __inline usbd_status 484 write_reg(struct uchcom_softc *sc, 485 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 486 { 487 DPRINTF(("uchcom: write reg 0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 488 (unsigned)reg1, (unsigned)val1, 489 (unsigned)reg2, (unsigned)val2)); 490 return generic_control_out( 491 sc, UCHCOM_REQ_WRITE_REG, 492 reg1|((uint16_t)reg2<<8), val1|((uint16_t)val2<<8)); 493 } 494 495 static __inline usbd_status 496 read_reg(struct uchcom_softc *sc, 497 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 498 { 499 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 500 usbd_status err; 501 int actin; 502 503 err = generic_control_in( 504 sc, UCHCOM_REQ_READ_REG, 505 reg1|((uint16_t)reg2<<8), 0, buf, sizeof buf, &actin); 506 if (err) 507 return err; 508 509 DPRINTF(("uchcom: read reg 0x%02X->0x%02X, 0x%02X->0x%02X\n", 510 (unsigned)reg1, (unsigned)buf[0], 511 (unsigned)reg2, (unsigned)buf[1])); 512 513 if (rval1) *rval1 = buf[0]; 514 if (rval2) *rval2 = buf[1]; 515 516 return USBD_NORMAL_COMPLETION; 517 } 518 519 static __inline usbd_status 520 get_version(struct uchcom_softc *sc, uint8_t *rver) 521 { 522 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 523 usbd_status err; 524 int actin; 525 526 err = generic_control_in( 527 sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof buf, &actin); 528 if (err) 529 return err; 530 531 if (rver) *rver = buf[0]; 532 533 return USBD_NORMAL_COMPLETION; 534 } 535 536 static __inline usbd_status 537 get_status(struct uchcom_softc *sc, uint8_t *rval) 538 { 539 return read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 540 } 541 542 static __inline usbd_status 543 set_dtrrts_10(struct uchcom_softc *sc, uint8_t val) 544 { 545 return write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 546 } 547 548 static __inline usbd_status 549 set_dtrrts_20(struct uchcom_softc *sc, uint8_t val) 550 { 551 return generic_control_out(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 552 } 553 554 555 /* ---------------------------------------------------------------------- 556 * middle layer 557 */ 558 559 static int 560 update_version(struct uchcom_softc *sc) 561 { 562 usbd_status err; 563 564 err = get_version(sc, &sc->sc_version); 565 if (err) { 566 aprint_error_dev(sc->sc_dev, "cannot get version: %s\n", 567 usbd_errstr(err)); 568 return EIO; 569 } 570 571 return 0; 572 } 573 574 static void 575 convert_status(struct uchcom_softc *sc, uint8_t cur) 576 { 577 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 578 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 579 580 cur = ~cur & 0x0F; 581 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 582 } 583 584 static int 585 update_status(struct uchcom_softc *sc) 586 { 587 usbd_status err; 588 uint8_t cur; 589 590 err = get_status(sc, &cur); 591 if (err) { 592 aprint_error_dev(sc->sc_dev, 593 "cannot update status: %s\n", usbd_errstr(err)); 594 return EIO; 595 } 596 convert_status(sc, cur); 597 598 return 0; 599 } 600 601 602 static int 603 set_dtrrts(struct uchcom_softc *sc, int dtr, int rts) 604 { 605 usbd_status err; 606 uint8_t val = 0; 607 608 if (dtr) val |= UCHCOM_DTR_MASK; 609 if (rts) val |= UCHCOM_RTS_MASK; 610 611 if (sc->sc_version < UCHCOM_VER_20) 612 err = set_dtrrts_10(sc, ~val); 613 else 614 err = set_dtrrts_20(sc, ~val); 615 616 if (err) { 617 aprint_error_dev(sc->sc_dev, "cannot set DTR/RTS: %s\n", 618 usbd_errstr(err)); 619 return EIO; 620 } 621 622 return 0; 623 } 624 625 static int 626 set_break(struct uchcom_softc *sc, int onoff) 627 { 628 usbd_status err; 629 uint8_t brk1, brk2; 630 631 err = read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 632 if (err) 633 return EIO; 634 if (onoff) { 635 /* on - clear bits */ 636 brk1 &= ~UCHCOM_BRK1_MASK; 637 brk2 &= ~UCHCOM_BRK2_MASK; 638 } else { 639 /* off - set bits */ 640 brk1 |= UCHCOM_BRK1_MASK; 641 brk2 |= UCHCOM_BRK2_MASK; 642 } 643 err = write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 644 if (err) 645 return EIO; 646 647 return 0; 648 } 649 650 static int 651 calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 652 { 653 int i; 654 const struct uchcom_divider_record *rp; 655 uint32_t div, rem, mod; 656 657 /* find record */ 658 for (i=0; i<NUM_DIVIDERS; i++) { 659 if (dividers[i].dvr_high >= rate && 660 dividers[i].dvr_low <= rate) { 661 rp = ÷rs[i]; 662 goto found; 663 } 664 } 665 return -1; 666 667 found: 668 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 669 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 670 dp->dv_div = rp->dvr_divider.dv_div; 671 else { 672 div = rp->dvr_base_clock / rate; 673 rem = rp->dvr_base_clock % rate; 674 if (div==0 || div>=0xFF) 675 return -1; 676 if ((rem<<1) >= rate) 677 div += 1; 678 dp->dv_div = (uint8_t)-div; 679 } 680 681 mod = UCHCOM_BPS_MOD_BASE/rate + UCHCOM_BPS_MOD_BASE_OFS; 682 mod = mod + mod/2; 683 684 dp->dv_mod = mod / 0x100; 685 686 return 0; 687 } 688 689 static int 690 set_dte_rate(struct uchcom_softc *sc, uint32_t rate) 691 { 692 usbd_status err; 693 struct uchcom_divider dv; 694 695 if (calc_divider_settings(&dv, rate)) 696 return EINVAL; 697 698 if ((err = write_reg(sc, 699 UCHCOM_REG_BPS_PRE, dv.dv_prescaler, 700 UCHCOM_REG_BPS_DIV, dv.dv_div)) || 701 (err = write_reg(sc, 702 UCHCOM_REG_BPS_MOD, dv.dv_mod, 703 UCHCOM_REG_BPS_PAD, 0))) { 704 aprint_error_dev(sc->sc_dev, "cannot set DTE rate: %s\n", 705 usbd_errstr(err)); 706 return EIO; 707 } 708 709 return 0; 710 } 711 712 static int 713 set_line_control(struct uchcom_softc *sc, tcflag_t cflag) 714 { 715 usbd_status err; 716 uint8_t lcr1val = 0, lcr2val = 0; 717 718 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 719 if (err) { 720 aprint_error_dev(sc->sc_dev, "cannot get LCR: %s\n", 721 usbd_errstr(err)); 722 return EIO; 723 } 724 725 lcr1val &= ~UCHCOM_LCR1_MASK; 726 lcr2val &= ~UCHCOM_LCR2_MASK; 727 728 /* 729 * XXX: it is difficult to handle the line control appropriately: 730 * - CS8, !CSTOPB and any parity mode seems ok, but 731 * - the chip doesn't have the function to calculate parity 732 * in !CS8 mode. 733 * - it is unclear that the chip supports CS5,6 mode. 734 * - it is unclear how to handle stop bits. 735 */ 736 737 switch (ISSET(cflag, CSIZE)) { 738 case CS5: 739 case CS6: 740 case CS7: 741 return EINVAL; 742 case CS8: 743 break; 744 } 745 746 if (ISSET(cflag, PARENB)) { 747 lcr1val |= UCHCOM_LCR1_PARENB; 748 if (ISSET(cflag, PARODD)) 749 lcr2val |= UCHCOM_LCR2_PARODD; 750 else 751 lcr2val |= UCHCOM_LCR2_PAREVEN; 752 } 753 754 err = write_reg(sc, UCHCOM_REG_LCR1, lcr1val, UCHCOM_REG_LCR2, lcr2val); 755 if (err) { 756 aprint_error_dev(sc->sc_dev, "cannot set LCR: %s\n", 757 usbd_errstr(err)); 758 return EIO; 759 } 760 761 return 0; 762 } 763 764 static int 765 clear_chip(struct uchcom_softc *sc) 766 { 767 usbd_status err; 768 769 DPRINTF(("%s: clear\n", USBDEVNAME(sc->sc_dev))); 770 err = generic_control_out(sc, UCHCOM_REQ_RESET, 0, 0); 771 if (err) { 772 aprint_error_dev(sc->sc_dev, "cannot clear: %s\n", 773 usbd_errstr(err)); 774 return EIO; 775 } 776 777 return 0; 778 } 779 780 static int 781 reset_chip(struct uchcom_softc *sc) 782 { 783 usbd_status err; 784 uint8_t lcr1val, lcr2val, pre, div, mod; 785 uint16_t val=0, idx=0; 786 787 err = read_reg(sc, UCHCOM_REG_LCR1, &lcr1val, UCHCOM_REG_LCR2, &lcr2val); 788 if (err) 789 goto failed; 790 791 err = read_reg(sc, UCHCOM_REG_BPS_PRE, &pre, UCHCOM_REG_BPS_DIV, &div); 792 if (err) 793 goto failed; 794 795 err = read_reg(sc, UCHCOM_REG_BPS_MOD, &mod, UCHCOM_REG_BPS_PAD, NULL); 796 if (err) 797 goto failed; 798 799 val |= (uint16_t)(lcr1val&0xF0) << 8; 800 val |= 0x01; 801 val |= (uint16_t)(lcr2val&0x0F) << 8; 802 val |= 0x02; 803 idx |= pre & 0x07; 804 val |= 0x04; 805 idx |= (uint16_t)div << 8; 806 val |= 0x08; 807 idx |= mod & 0xF8; 808 val |= 0x10; 809 810 DPRINTF(("%s: reset v=0x%04X, i=0x%04X\n", 811 USBDEVNAME(sc->sc_dev), val, idx)); 812 813 err = generic_control_out(sc, UCHCOM_REQ_RESET, val, idx); 814 if (err) 815 goto failed; 816 817 return 0; 818 819 failed: 820 printf("%s: cannot reset: %s\n", 821 USBDEVNAME(sc->sc_dev), usbd_errstr(err)); 822 return EIO; 823 } 824 825 static int 826 setup_comm(struct uchcom_softc *sc) 827 { 828 int ret; 829 830 ret = update_version(sc); 831 if (ret) 832 return ret; 833 834 ret = clear_chip(sc); 835 if (ret) 836 return ret; 837 838 ret = set_dte_rate(sc, TTYDEF_SPEED); 839 if (ret) 840 return ret; 841 842 ret = set_line_control(sc, CS8); 843 if (ret) 844 return ret; 845 846 ret = update_status(sc); 847 if (ret) 848 return ret; 849 850 ret = reset_chip(sc); 851 if (ret) 852 return ret; 853 854 ret = set_dte_rate(sc, TTYDEF_SPEED); /* XXX */ 855 if (ret) 856 return ret; 857 858 sc->sc_dtr = sc->sc_rts = 1; 859 ret = set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 860 if (ret) 861 return ret; 862 863 return 0; 864 } 865 866 static int 867 setup_intr_pipe(struct uchcom_softc *sc) 868 { 869 usbd_status err; 870 871 if (sc->sc_intr_endpoint != -1 && sc->sc_intr_pipe == NULL) { 872 sc->sc_intr_buf = malloc(sc->sc_intr_size, M_USBDEV, M_WAITOK); 873 err = usbd_open_pipe_intr(sc->sc_iface, 874 sc->sc_intr_endpoint, 875 USBD_SHORT_XFER_OK, 876 &sc->sc_intr_pipe, sc, 877 sc->sc_intr_buf, 878 sc->sc_intr_size, 879 uchcom_intr, USBD_DEFAULT_INTERVAL); 880 if (err) { 881 aprint_error_dev(sc->sc_dev, 882 "cannot open interrupt pipe: %s\n", 883 usbd_errstr(err)); 884 return EIO; 885 } 886 } 887 return 0; 888 } 889 890 static void 891 close_intr_pipe(struct uchcom_softc *sc) 892 { 893 usbd_status err; 894 895 if (sc->sc_dying) 896 return; 897 898 if (sc->sc_intr_pipe != NULL) { 899 err = usbd_abort_pipe(sc->sc_intr_pipe); 900 if (err) 901 aprint_error_dev(sc->sc_dev, 902 "abort interrupt pipe failed: %s\n", 903 usbd_errstr(err)); 904 err = usbd_close_pipe(sc->sc_intr_pipe); 905 if (err) 906 aprint_error_dev(sc->sc_dev, 907 "close interrupt pipe failed: %s\n", 908 usbd_errstr(err)); 909 free(sc->sc_intr_buf, M_USBDEV); 910 sc->sc_intr_pipe = NULL; 911 } 912 } 913 914 915 /* ---------------------------------------------------------------------- 916 * methods for ucom 917 */ 918 void 919 uchcom_get_status(void *arg, int portno, u_char *rlsr, u_char *rmsr) 920 { 921 struct uchcom_softc *sc = arg; 922 923 if (sc->sc_dying) 924 return; 925 926 *rlsr = sc->sc_lsr; 927 *rmsr = sc->sc_msr; 928 } 929 930 void 931 uchcom_set(void *arg, int portno, int reg, int onoff) 932 { 933 struct uchcom_softc *sc = arg; 934 935 if (sc->sc_dying) 936 return; 937 938 switch (reg) { 939 case UCOM_SET_DTR: 940 sc->sc_dtr = !!onoff; 941 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 942 break; 943 case UCOM_SET_RTS: 944 sc->sc_rts = !!onoff; 945 set_dtrrts(sc, sc->sc_dtr, sc->sc_rts); 946 break; 947 case UCOM_SET_BREAK: 948 set_break(sc, onoff); 949 break; 950 } 951 } 952 953 int 954 uchcom_param(void *arg, int portno, struct termios *t) 955 { 956 struct uchcom_softc *sc = arg; 957 int ret; 958 959 if (sc->sc_dying) 960 return 0; 961 962 ret = set_line_control(sc, t->c_cflag); 963 if (ret) 964 return ret; 965 966 ret = set_dte_rate(sc, t->c_ospeed); 967 if (ret) 968 return ret; 969 970 return 0; 971 } 972 973 int 974 uchcom_open(void *arg, int portno) 975 { 976 int ret; 977 struct uchcom_softc *sc = arg; 978 979 if (sc->sc_dying) 980 return EIO; 981 982 ret = setup_intr_pipe(sc); 983 if (ret) 984 return ret; 985 986 ret = setup_comm(sc); 987 if (ret) 988 return ret; 989 990 return 0; 991 } 992 993 void 994 uchcom_close(void *arg, int portno) 995 { 996 struct uchcom_softc *sc = arg; 997 998 if (sc->sc_dying) 999 return; 1000 1001 close_intr_pipe(sc); 1002 } 1003 1004 1005 /* ---------------------------------------------------------------------- 1006 * callback when the modem status is changed. 1007 */ 1008 void 1009 uchcom_intr(usbd_xfer_handle xfer, usbd_private_handle priv, 1010 usbd_status status) 1011 { 1012 struct uchcom_softc *sc = priv; 1013 u_char *buf = sc->sc_intr_buf; 1014 1015 if (sc->sc_dying) 1016 return; 1017 1018 if (status != USBD_NORMAL_COMPLETION) { 1019 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED) 1020 return; 1021 1022 DPRINTF(("%s: abnormal status: %s\n", 1023 USBDEVNAME(sc->sc_dev), usbd_errstr(status))); 1024 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe); 1025 return; 1026 } 1027 DPRINTF(("%s: intr: 0x%02X 0x%02X 0x%02X 0x%02X " 1028 "0x%02X 0x%02X 0x%02X 0x%02X\n", 1029 USBDEVNAME(sc->sc_dev), 1030 (unsigned)buf[0], (unsigned)buf[1], 1031 (unsigned)buf[2], (unsigned)buf[3], 1032 (unsigned)buf[4], (unsigned)buf[5], 1033 (unsigned)buf[6], (unsigned)buf[7])); 1034 1035 convert_status(sc, buf[UCHCOM_INTR_STAT1]); 1036 ucom_status_change(device_private(sc->sc_subdev)); 1037 } 1038
Indexes created Sat Oct 11 08:10:02 GMT 2025