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