uchcom.c revision 240659
1/* $NetBSD: uchcom.c,v 1.1 2007/09/03 17:57:37 tshiozak Exp $ */ 2 3/*- 4 * Copyright (c) 2007, Takanori Watanabe 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29/* 30 * Copyright (c) 2007 The NetBSD Foundation, Inc. 31 * All rights reserved. 32 * 33 * This code is derived from software contributed to The NetBSD Foundation 34 * by Takuya SHIOZAKI (tshiozak@netbsd.org). 35 * 36 * Redistribution and use in source and binary forms, with or without 37 * modification, are permitted provided that the following conditions 38 * are met: 39 * 1. Redistributions of source code must retain the above copyright 40 * notice, this list of conditions and the following disclaimer. 41 * 2. Redistributions in binary form must reproduce the above copyright 42 * notice, this list of conditions and the following disclaimer in the 43 * documentation and/or other materials provided with the distribution. 44 * 3. All advertising materials mentioning features or use of this software 45 * must display the following acknowledgement: 46 * This product includes software developed by the NetBSD 47 * Foundation, Inc. and its contributors. 48 * 4. Neither the name of The NetBSD Foundation nor the names of its 49 * contributors may be used to endorse or promote products derived 50 * from this software without specific prior written permission. 51 * 52 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 53 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 54 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 55 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 56 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 57 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 58 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 59 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 60 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 61 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 62 * POSSIBILITY OF SUCH DAMAGE. 63 */ 64 65#include <sys/cdefs.h> 66__FBSDID("$FreeBSD: stable/9/sys/dev/usb/serial/uchcom.c 240659 2012-09-18 16:28:49Z hselasky $"); 67 68/* 69 * Driver for WinChipHead CH341/340, the worst USB-serial chip in the 70 * world. 71 */ 72 73#include <sys/stdint.h> 74#include <sys/stddef.h> 75#include <sys/param.h> 76#include <sys/queue.h> 77#include <sys/types.h> 78#include <sys/systm.h> 79#include <sys/kernel.h> 80#include <sys/bus.h> 81#include <sys/module.h> 82#include <sys/lock.h> 83#include <sys/mutex.h> 84#include <sys/condvar.h> 85#include <sys/sysctl.h> 86#include <sys/sx.h> 87#include <sys/unistd.h> 88#include <sys/callout.h> 89#include <sys/malloc.h> 90#include <sys/priv.h> 91 92#include <dev/usb/usb.h> 93#include <dev/usb/usbdi.h> 94#include <dev/usb/usbdi_util.h> 95#include "usbdevs.h" 96 97#define USB_DEBUG_VAR uchcom_debug 98#include <dev/usb/usb_debug.h> 99#include <dev/usb/usb_process.h> 100 101#include <dev/usb/serial/usb_serial.h> 102 103#ifdef USB_DEBUG 104static int uchcom_debug = 0; 105 106SYSCTL_NODE(_hw_usb, OID_AUTO, uchcom, CTLFLAG_RW, 0, "USB uchcom"); 107SYSCTL_INT(_hw_usb_uchcom, OID_AUTO, debug, CTLFLAG_RW, 108 &uchcom_debug, 0, "uchcom debug level"); 109#endif 110 111#define UCHCOM_IFACE_INDEX 0 112#define UCHCOM_CONFIG_INDEX 0 113 114#define UCHCOM_REV_CH340 0x0250 115#define UCHCOM_INPUT_BUF_SIZE 8 116 117#define UCHCOM_REQ_GET_VERSION 0x5F 118#define UCHCOM_REQ_READ_REG 0x95 119#define UCHCOM_REQ_WRITE_REG 0x9A 120#define UCHCOM_REQ_RESET 0xA1 121#define UCHCOM_REQ_SET_DTRRTS 0xA4 122 123#define UCHCOM_REG_STAT1 0x06 124#define UCHCOM_REG_STAT2 0x07 125#define UCHCOM_REG_BPS_PRE 0x12 126#define UCHCOM_REG_BPS_DIV 0x13 127#define UCHCOM_REG_BPS_MOD 0x14 128#define UCHCOM_REG_BPS_PAD 0x0F 129#define UCHCOM_REG_BREAK1 0x05 130#define UCHCOM_REG_BREAK2 0x18 131#define UCHCOM_REG_LCR1 0x18 132#define UCHCOM_REG_LCR2 0x25 133 134#define UCHCOM_VER_20 0x20 135 136#define UCHCOM_BASE_UNKNOWN 0 137#define UCHCOM_BPS_MOD_BASE 20000000 138#define UCHCOM_BPS_MOD_BASE_OFS 1100 139 140#define UCHCOM_DTR_MASK 0x20 141#define UCHCOM_RTS_MASK 0x40 142 143#define UCHCOM_BRK1_MASK 0x01 144#define UCHCOM_BRK2_MASK 0x40 145 146#define UCHCOM_LCR1_MASK 0xAF 147#define UCHCOM_LCR2_MASK 0x07 148#define UCHCOM_LCR1_PARENB 0x80 149#define UCHCOM_LCR2_PAREVEN 0x07 150#define UCHCOM_LCR2_PARODD 0x06 151#define UCHCOM_LCR2_PARMARK 0x05 152#define UCHCOM_LCR2_PARSPACE 0x04 153 154#define UCHCOM_INTR_STAT1 0x02 155#define UCHCOM_INTR_STAT2 0x03 156#define UCHCOM_INTR_LEAST 4 157 158#define UCHCOM_BULK_BUF_SIZE 1024 /* bytes */ 159 160enum { 161 UCHCOM_BULK_DT_WR, 162 UCHCOM_BULK_DT_RD, 163 UCHCOM_INTR_DT_RD, 164 UCHCOM_N_TRANSFER, 165}; 166 167struct uchcom_softc { 168 struct ucom_super_softc sc_super_ucom; 169 struct ucom_softc sc_ucom; 170 171 struct usb_xfer *sc_xfer[UCHCOM_N_TRANSFER]; 172 struct usb_device *sc_udev; 173 struct mtx sc_mtx; 174 175 uint8_t sc_dtr; /* local copy */ 176 uint8_t sc_rts; /* local copy */ 177 uint8_t sc_version; 178 uint8_t sc_msr; 179 uint8_t sc_lsr; /* local status register */ 180}; 181 182struct uchcom_divider { 183 uint8_t dv_prescaler; 184 uint8_t dv_div; 185 uint8_t dv_mod; 186}; 187 188struct uchcom_divider_record { 189 uint32_t dvr_high; 190 uint32_t dvr_low; 191 uint32_t dvr_base_clock; 192 struct uchcom_divider dvr_divider; 193}; 194 195static const struct uchcom_divider_record dividers[] = 196{ 197 {307200, 307200, UCHCOM_BASE_UNKNOWN, {7, 0xD9, 0}}, 198 {921600, 921600, UCHCOM_BASE_UNKNOWN, {7, 0xF3, 0}}, 199 {2999999, 23530, 6000000, {3, 0, 0}}, 200 {23529, 2942, 750000, {2, 0, 0}}, 201 {2941, 368, 93750, {1, 0, 0}}, 202 {367, 1, 11719, {0, 0, 0}}, 203}; 204 205#define NUM_DIVIDERS (sizeof (dividers) / sizeof (dividers[0])) 206 207static const STRUCT_USB_HOST_ID uchcom_devs[] = { 208 {USB_VPI(USB_VENDOR_WCH, USB_PRODUCT_WCH_CH341SER, 0)}, 209 {USB_VPI(USB_VENDOR_WCH2, USB_PRODUCT_WCH2_CH341SER, 0)}, 210 {USB_VPI(USB_VENDOR_WCH2, USB_PRODUCT_WCH2_CH341SER_2, 0)}, 211}; 212 213/* protypes */ 214 215static void uchcom_free(struct ucom_softc *); 216static int uchcom_pre_param(struct ucom_softc *, struct termios *); 217static void uchcom_cfg_get_status(struct ucom_softc *, uint8_t *, 218 uint8_t *); 219static void uchcom_cfg_open(struct ucom_softc *ucom); 220static void uchcom_cfg_param(struct ucom_softc *, struct termios *); 221static void uchcom_cfg_set_break(struct ucom_softc *, uint8_t); 222static void uchcom_cfg_set_dtr(struct ucom_softc *, uint8_t); 223static void uchcom_cfg_set_rts(struct ucom_softc *, uint8_t); 224static void uchcom_start_read(struct ucom_softc *); 225static void uchcom_start_write(struct ucom_softc *); 226static void uchcom_stop_read(struct ucom_softc *); 227static void uchcom_stop_write(struct ucom_softc *); 228static void uchcom_update_version(struct uchcom_softc *); 229static void uchcom_convert_status(struct uchcom_softc *, uint8_t); 230static void uchcom_update_status(struct uchcom_softc *); 231static void uchcom_set_dtr_rts(struct uchcom_softc *); 232static int uchcom_calc_divider_settings(struct uchcom_divider *, uint32_t); 233static void uchcom_set_baudrate(struct uchcom_softc *, uint32_t); 234static void uchcom_poll(struct ucom_softc *ucom); 235 236static device_probe_t uchcom_probe; 237static device_attach_t uchcom_attach; 238static device_detach_t uchcom_detach; 239static void uchcom_free_softc(struct uchcom_softc *); 240 241static usb_callback_t uchcom_intr_callback; 242static usb_callback_t uchcom_write_callback; 243static usb_callback_t uchcom_read_callback; 244 245static const struct usb_config uchcom_config_data[UCHCOM_N_TRANSFER] = { 246 247 [UCHCOM_BULK_DT_WR] = { 248 .type = UE_BULK, 249 .endpoint = UE_ADDR_ANY, 250 .direction = UE_DIR_OUT, 251 .bufsize = UCHCOM_BULK_BUF_SIZE, 252 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 253 .callback = &uchcom_write_callback, 254 }, 255 256 [UCHCOM_BULK_DT_RD] = { 257 .type = UE_BULK, 258 .endpoint = UE_ADDR_ANY, 259 .direction = UE_DIR_IN, 260 .bufsize = UCHCOM_BULK_BUF_SIZE, 261 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 262 .callback = &uchcom_read_callback, 263 }, 264 265 [UCHCOM_INTR_DT_RD] = { 266 .type = UE_INTERRUPT, 267 .endpoint = UE_ADDR_ANY, 268 .direction = UE_DIR_IN, 269 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 270 .bufsize = 0, /* use wMaxPacketSize */ 271 .callback = &uchcom_intr_callback, 272 }, 273}; 274 275static struct ucom_callback uchcom_callback = { 276 .ucom_cfg_get_status = &uchcom_cfg_get_status, 277 .ucom_cfg_set_dtr = &uchcom_cfg_set_dtr, 278 .ucom_cfg_set_rts = &uchcom_cfg_set_rts, 279 .ucom_cfg_set_break = &uchcom_cfg_set_break, 280 .ucom_cfg_open = &uchcom_cfg_open, 281 .ucom_cfg_param = &uchcom_cfg_param, 282 .ucom_pre_param = &uchcom_pre_param, 283 .ucom_start_read = &uchcom_start_read, 284 .ucom_stop_read = &uchcom_stop_read, 285 .ucom_start_write = &uchcom_start_write, 286 .ucom_stop_write = &uchcom_stop_write, 287 .ucom_poll = &uchcom_poll, 288 .ucom_free = &uchcom_free, 289}; 290 291/* ---------------------------------------------------------------------- 292 * driver entry points 293 */ 294 295static int 296uchcom_probe(device_t dev) 297{ 298 struct usb_attach_arg *uaa = device_get_ivars(dev); 299 300 DPRINTFN(11, "\n"); 301 302 if (uaa->usb_mode != USB_MODE_HOST) { 303 return (ENXIO); 304 } 305 if (uaa->info.bConfigIndex != UCHCOM_CONFIG_INDEX) { 306 return (ENXIO); 307 } 308 if (uaa->info.bIfaceIndex != UCHCOM_IFACE_INDEX) { 309 return (ENXIO); 310 } 311 return (usbd_lookup_id_by_uaa(uchcom_devs, sizeof(uchcom_devs), uaa)); 312} 313 314static int 315uchcom_attach(device_t dev) 316{ 317 struct uchcom_softc *sc = device_get_softc(dev); 318 struct usb_attach_arg *uaa = device_get_ivars(dev); 319 int error; 320 uint8_t iface_index; 321 322 DPRINTFN(11, "\n"); 323 324 device_set_usb_desc(dev); 325 mtx_init(&sc->sc_mtx, "uchcom", NULL, MTX_DEF); 326 ucom_ref(&sc->sc_super_ucom); 327 328 sc->sc_udev = uaa->device; 329 330 switch (uaa->info.bcdDevice) { 331 case UCHCOM_REV_CH340: 332 device_printf(dev, "CH340 detected\n"); 333 break; 334 default: 335 device_printf(dev, "CH341 detected\n"); 336 break; 337 } 338 339 iface_index = UCHCOM_IFACE_INDEX; 340 error = usbd_transfer_setup(uaa->device, 341 &iface_index, sc->sc_xfer, uchcom_config_data, 342 UCHCOM_N_TRANSFER, sc, &sc->sc_mtx); 343 344 if (error) { 345 DPRINTF("one or more missing USB endpoints, " 346 "error=%s\n", usbd_errstr(error)); 347 goto detach; 348 } 349 350 /* clear stall at first run */ 351 mtx_lock(&sc->sc_mtx); 352 usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 353 usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 354 mtx_unlock(&sc->sc_mtx); 355 356 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 357 &uchcom_callback, &sc->sc_mtx); 358 if (error) { 359 goto detach; 360 } 361 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 362 363 return (0); 364 365detach: 366 uchcom_detach(dev); 367 return (ENXIO); 368} 369 370static int 371uchcom_detach(device_t dev) 372{ 373 struct uchcom_softc *sc = device_get_softc(dev); 374 375 DPRINTFN(11, "\n"); 376 377 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 378 usbd_transfer_unsetup(sc->sc_xfer, UCHCOM_N_TRANSFER); 379 380 device_claim_softc(dev); 381 382 uchcom_free_softc(sc); 383 384 return (0); 385} 386 387UCOM_UNLOAD_DRAIN(uchcom); 388 389static void 390uchcom_free_softc(struct uchcom_softc *sc) 391{ 392 if (ucom_unref(&sc->sc_super_ucom)) { 393 mtx_destroy(&sc->sc_mtx); 394 device_free_softc(sc); 395 } 396} 397 398static void 399uchcom_free(struct ucom_softc *ucom) 400{ 401 uchcom_free_softc(ucom->sc_parent); 402} 403 404/* ---------------------------------------------------------------------- 405 * low level i/o 406 */ 407 408static void 409uchcom_ctrl_write(struct uchcom_softc *sc, uint8_t reqno, 410 uint16_t value, uint16_t index) 411{ 412 struct usb_device_request req; 413 414 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 415 req.bRequest = reqno; 416 USETW(req.wValue, value); 417 USETW(req.wIndex, index); 418 USETW(req.wLength, 0); 419 420 ucom_cfg_do_request(sc->sc_udev, 421 &sc->sc_ucom, &req, NULL, 0, 1000); 422} 423 424static void 425uchcom_ctrl_read(struct uchcom_softc *sc, uint8_t reqno, 426 uint16_t value, uint16_t index, void *buf, uint16_t buflen) 427{ 428 struct usb_device_request req; 429 430 req.bmRequestType = UT_READ_VENDOR_DEVICE; 431 req.bRequest = reqno; 432 USETW(req.wValue, value); 433 USETW(req.wIndex, index); 434 USETW(req.wLength, buflen); 435 436 ucom_cfg_do_request(sc->sc_udev, 437 &sc->sc_ucom, &req, buf, USB_SHORT_XFER_OK, 1000); 438} 439 440static void 441uchcom_write_reg(struct uchcom_softc *sc, 442 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 443{ 444 DPRINTF("0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 445 (unsigned)reg1, (unsigned)val1, 446 (unsigned)reg2, (unsigned)val2); 447 uchcom_ctrl_write( 448 sc, UCHCOM_REQ_WRITE_REG, 449 reg1 | ((uint16_t)reg2 << 8), val1 | ((uint16_t)val2 << 8)); 450} 451 452static void 453uchcom_read_reg(struct uchcom_softc *sc, 454 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 455{ 456 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 457 458 uchcom_ctrl_read( 459 sc, UCHCOM_REQ_READ_REG, 460 reg1 | ((uint16_t)reg2 << 8), 0, buf, sizeof(buf)); 461 462 DPRINTF("0x%02X->0x%02X, 0x%02X->0x%02X\n", 463 (unsigned)reg1, (unsigned)buf[0], 464 (unsigned)reg2, (unsigned)buf[1]); 465 466 if (rval1) 467 *rval1 = buf[0]; 468 if (rval2) 469 *rval2 = buf[1]; 470} 471 472static void 473uchcom_get_version(struct uchcom_softc *sc, uint8_t *rver) 474{ 475 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 476 477 uchcom_ctrl_read(sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf)); 478 479 if (rver) 480 *rver = buf[0]; 481} 482 483static void 484uchcom_get_status(struct uchcom_softc *sc, uint8_t *rval) 485{ 486 uchcom_read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 487} 488 489static void 490uchcom_set_dtr_rts_10(struct uchcom_softc *sc, uint8_t val) 491{ 492 uchcom_write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 493} 494 495static void 496uchcom_set_dtr_rts_20(struct uchcom_softc *sc, uint8_t val) 497{ 498 uchcom_ctrl_write(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 499} 500 501 502/* ---------------------------------------------------------------------- 503 * middle layer 504 */ 505 506static void 507uchcom_update_version(struct uchcom_softc *sc) 508{ 509 uchcom_get_version(sc, &sc->sc_version); 510} 511 512static void 513uchcom_convert_status(struct uchcom_softc *sc, uint8_t cur) 514{ 515 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 516 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 517 518 cur = ~cur & 0x0F; 519 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 520} 521 522static void 523uchcom_update_status(struct uchcom_softc *sc) 524{ 525 uint8_t cur; 526 527 uchcom_get_status(sc, &cur); 528 uchcom_convert_status(sc, cur); 529} 530 531 532static void 533uchcom_set_dtr_rts(struct uchcom_softc *sc) 534{ 535 uint8_t val = 0; 536 537 if (sc->sc_dtr) 538 val |= UCHCOM_DTR_MASK; 539 if (sc->sc_rts) 540 val |= UCHCOM_RTS_MASK; 541 542 if (sc->sc_version < UCHCOM_VER_20) 543 uchcom_set_dtr_rts_10(sc, ~val); 544 else 545 uchcom_set_dtr_rts_20(sc, ~val); 546} 547 548static void 549uchcom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 550{ 551 struct uchcom_softc *sc = ucom->sc_parent; 552 uint8_t brk1; 553 uint8_t brk2; 554 555 uchcom_read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 556 if (onoff) { 557 /* on - clear bits */ 558 brk1 &= ~UCHCOM_BRK1_MASK; 559 brk2 &= ~UCHCOM_BRK2_MASK; 560 } else { 561 /* off - set bits */ 562 brk1 |= UCHCOM_BRK1_MASK; 563 brk2 |= UCHCOM_BRK2_MASK; 564 } 565 uchcom_write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 566} 567 568static int 569uchcom_calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 570{ 571 const struct uchcom_divider_record *rp; 572 uint32_t div; 573 uint32_t rem; 574 uint32_t mod; 575 uint8_t i; 576 577 /* find record */ 578 for (i = 0; i != NUM_DIVIDERS; i++) { 579 if (dividers[i].dvr_high >= rate && 580 dividers[i].dvr_low <= rate) { 581 rp = ÷rs[i]; 582 goto found; 583 } 584 } 585 return (-1); 586 587found: 588 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 589 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 590 dp->dv_div = rp->dvr_divider.dv_div; 591 else { 592 div = rp->dvr_base_clock / rate; 593 rem = rp->dvr_base_clock % rate; 594 if (div == 0 || div >= 0xFF) 595 return (-1); 596 if ((rem << 1) >= rate) 597 div += 1; 598 dp->dv_div = (uint8_t)-div; 599 } 600 601 mod = (UCHCOM_BPS_MOD_BASE / rate) + UCHCOM_BPS_MOD_BASE_OFS; 602 mod = mod + (mod / 2); 603 604 dp->dv_mod = (mod + 0xFF) / 0x100; 605 606 return (0); 607} 608 609static void 610uchcom_set_baudrate(struct uchcom_softc *sc, uint32_t rate) 611{ 612 struct uchcom_divider dv; 613 614 if (uchcom_calc_divider_settings(&dv, rate)) 615 return; 616 617 uchcom_write_reg(sc, 618 UCHCOM_REG_BPS_PRE, dv.dv_prescaler, 619 UCHCOM_REG_BPS_DIV, dv.dv_div); 620 uchcom_write_reg(sc, 621 UCHCOM_REG_BPS_MOD, dv.dv_mod, 622 UCHCOM_REG_BPS_PAD, 0); 623} 624 625/* ---------------------------------------------------------------------- 626 * methods for ucom 627 */ 628static void 629uchcom_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 630{ 631 struct uchcom_softc *sc = ucom->sc_parent; 632 633 DPRINTF("\n"); 634 635 *lsr = sc->sc_lsr; 636 *msr = sc->sc_msr; 637} 638 639static void 640uchcom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 641{ 642 struct uchcom_softc *sc = ucom->sc_parent; 643 644 DPRINTF("onoff = %d\n", onoff); 645 646 sc->sc_dtr = onoff; 647 uchcom_set_dtr_rts(sc); 648} 649 650static void 651uchcom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 652{ 653 struct uchcom_softc *sc = ucom->sc_parent; 654 655 DPRINTF("onoff = %d\n", onoff); 656 657 sc->sc_rts = onoff; 658 uchcom_set_dtr_rts(sc); 659} 660 661static void 662uchcom_cfg_open(struct ucom_softc *ucom) 663{ 664 struct uchcom_softc *sc = ucom->sc_parent; 665 666 DPRINTF("\n"); 667 668 uchcom_update_version(sc); 669 uchcom_update_status(sc); 670} 671 672static int 673uchcom_pre_param(struct ucom_softc *ucom, struct termios *t) 674{ 675 struct uchcom_divider dv; 676 677 switch (t->c_cflag & CSIZE) { 678 case CS8: 679 break; 680 default: 681 return (EIO); 682 } 683 684 if (uchcom_calc_divider_settings(&dv, t->c_ospeed)) { 685 return (EIO); 686 } 687 return (0); /* success */ 688} 689 690static void 691uchcom_cfg_param(struct ucom_softc *ucom, struct termios *t) 692{ 693 struct uchcom_softc *sc = ucom->sc_parent; 694 695 uchcom_get_version(sc, 0); 696 uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0, 0); 697 uchcom_set_baudrate(sc, t->c_ospeed); 698 uchcom_read_reg(sc, 0x18, 0, 0x25, 0); 699 uchcom_write_reg(sc, 0x18, 0x50, 0x25, 0x00); 700 uchcom_update_status(sc); 701 uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0x501f, 0xd90a); 702 uchcom_set_baudrate(sc, t->c_ospeed); 703 uchcom_set_dtr_rts(sc); 704 uchcom_update_status(sc); 705} 706 707static void 708uchcom_start_read(struct ucom_softc *ucom) 709{ 710 struct uchcom_softc *sc = ucom->sc_parent; 711 712 /* start interrupt endpoint */ 713 usbd_transfer_start(sc->sc_xfer[UCHCOM_INTR_DT_RD]); 714 715 /* start read endpoint */ 716 usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 717} 718 719static void 720uchcom_stop_read(struct ucom_softc *ucom) 721{ 722 struct uchcom_softc *sc = ucom->sc_parent; 723 724 /* stop interrupt endpoint */ 725 usbd_transfer_stop(sc->sc_xfer[UCHCOM_INTR_DT_RD]); 726 727 /* stop read endpoint */ 728 usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 729} 730 731static void 732uchcom_start_write(struct ucom_softc *ucom) 733{ 734 struct uchcom_softc *sc = ucom->sc_parent; 735 736 usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 737} 738 739static void 740uchcom_stop_write(struct ucom_softc *ucom) 741{ 742 struct uchcom_softc *sc = ucom->sc_parent; 743 744 usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 745} 746 747/* ---------------------------------------------------------------------- 748 * callback when the modem status is changed. 749 */ 750static void 751uchcom_intr_callback(struct usb_xfer *xfer, usb_error_t error) 752{ 753 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 754 struct usb_page_cache *pc; 755 uint8_t buf[UCHCOM_INTR_LEAST]; 756 int actlen; 757 758 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 759 760 switch (USB_GET_STATE(xfer)) { 761 case USB_ST_TRANSFERRED: 762 763 DPRINTF("actlen = %u\n", actlen); 764 765 if (actlen >= UCHCOM_INTR_LEAST) { 766 pc = usbd_xfer_get_frame(xfer, 0); 767 usbd_copy_out(pc, 0, buf, UCHCOM_INTR_LEAST); 768 769 DPRINTF("data = 0x%02X 0x%02X 0x%02X 0x%02X\n", 770 (unsigned)buf[0], (unsigned)buf[1], 771 (unsigned)buf[2], (unsigned)buf[3]); 772 773 uchcom_convert_status(sc, buf[UCHCOM_INTR_STAT1]); 774 ucom_status_change(&sc->sc_ucom); 775 } 776 case USB_ST_SETUP: 777tr_setup: 778 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 779 usbd_transfer_submit(xfer); 780 break; 781 782 default: /* Error */ 783 if (error != USB_ERR_CANCELLED) { 784 /* try to clear stall first */ 785 usbd_xfer_set_stall(xfer); 786 goto tr_setup; 787 } 788 break; 789 } 790} 791 792static void 793uchcom_write_callback(struct usb_xfer *xfer, usb_error_t error) 794{ 795 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 796 struct usb_page_cache *pc; 797 uint32_t actlen; 798 799 switch (USB_GET_STATE(xfer)) { 800 case USB_ST_SETUP: 801 case USB_ST_TRANSFERRED: 802tr_setup: 803 pc = usbd_xfer_get_frame(xfer, 0); 804 if (ucom_get_data(&sc->sc_ucom, pc, 0, 805 usbd_xfer_max_len(xfer), &actlen)) { 806 807 DPRINTF("actlen = %d\n", actlen); 808 809 usbd_xfer_set_frame_len(xfer, 0, actlen); 810 usbd_transfer_submit(xfer); 811 } 812 break; 813 814 default: /* Error */ 815 if (error != USB_ERR_CANCELLED) { 816 /* try to clear stall first */ 817 usbd_xfer_set_stall(xfer); 818 goto tr_setup; 819 } 820 break; 821 } 822} 823 824static void 825uchcom_read_callback(struct usb_xfer *xfer, usb_error_t error) 826{ 827 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 828 struct usb_page_cache *pc; 829 int actlen; 830 831 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 832 833 switch (USB_GET_STATE(xfer)) { 834 case USB_ST_TRANSFERRED: 835 836 if (actlen > 0) { 837 pc = usbd_xfer_get_frame(xfer, 0); 838 ucom_put_data(&sc->sc_ucom, pc, 0, actlen); 839 } 840 841 case USB_ST_SETUP: 842tr_setup: 843 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 844 usbd_transfer_submit(xfer); 845 break; 846 847 default: /* Error */ 848 if (error != USB_ERR_CANCELLED) { 849 /* try to clear stall first */ 850 usbd_xfer_set_stall(xfer); 851 goto tr_setup; 852 } 853 break; 854 } 855} 856 857static void 858uchcom_poll(struct ucom_softc *ucom) 859{ 860 struct uchcom_softc *sc = ucom->sc_parent; 861 usbd_transfer_poll(sc->sc_xfer, UCHCOM_N_TRANSFER); 862} 863 864static device_method_t uchcom_methods[] = { 865 /* Device interface */ 866 DEVMETHOD(device_probe, uchcom_probe), 867 DEVMETHOD(device_attach, uchcom_attach), 868 DEVMETHOD(device_detach, uchcom_detach), 869 DEVMETHOD_END 870}; 871 872static driver_t uchcom_driver = { 873 .name = "ucom", 874 .methods = uchcom_methods, 875 .size = sizeof(struct uchcom_softc) 876}; 877 878static devclass_t uchcom_devclass; 879 880DRIVER_MODULE(uchcom, uhub, uchcom_driver, uchcom_devclass, NULL, 0); 881MODULE_DEPEND(uchcom, ucom, 1, 1, 1); 882MODULE_DEPEND(uchcom, usb, 1, 1, 1); 883MODULE_VERSION(uchcom, 1); 884