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("$FreeBSD$"); 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 104 static int uchcom_debug = 0; 105 106 static SYSCTL_NODE(_hw_usb, OID_AUTO, uchcom, CTLFLAG_RW, 0, "USB uchcom"); 107 SYSCTL_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 */ 159 160 enum { 161 UCHCOM_BULK_DT_WR, 162 UCHCOM_BULK_DT_RD, 163 UCHCOM_INTR_DT_RD, 164 UCHCOM_N_TRANSFER, 165 }; 166 167 struct 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 }; 181 182 struct uchcom_divider { 183 uint8_t dv_prescaler; 184 uint8_t dv_div; 185 uint8_t dv_mod; 186 }; 187 188 struct 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 }; 194 195 static 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])) 206 207 static 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 }; 211 212 /* protypes */ 213 214 static void uchcom_free(struct ucom_softc *); 215 static int uchcom_pre_param(struct ucom_softc *, struct termios *); 216 static void uchcom_cfg_get_status(struct ucom_softc *, uint8_t *, 217 uint8_t *); 218 static void uchcom_cfg_open(struct ucom_softc *ucom); 219 static void uchcom_cfg_param(struct ucom_softc *, struct termios *); 220 static void uchcom_cfg_set_break(struct ucom_softc *, uint8_t); 221 static void uchcom_cfg_set_dtr(struct ucom_softc *, uint8_t); 222 static void uchcom_cfg_set_rts(struct ucom_softc *, uint8_t); 223 static void uchcom_start_read(struct ucom_softc *); 224 static void uchcom_start_write(struct ucom_softc *); 225 static void uchcom_stop_read(struct ucom_softc *); 226 static void uchcom_stop_write(struct ucom_softc *); 227 static void uchcom_update_version(struct uchcom_softc *); 228 static void uchcom_convert_status(struct uchcom_softc *, uint8_t); 229 static void uchcom_update_status(struct uchcom_softc *); 230 static void uchcom_set_dtr_rts(struct uchcom_softc *); 231 static int uchcom_calc_divider_settings(struct uchcom_divider *, uint32_t); 232 static void uchcom_set_baudrate(struct uchcom_softc *, uint32_t); 233 static void uchcom_poll(struct ucom_softc *ucom); 234 235 static device_probe_t uchcom_probe; 236 static device_attach_t uchcom_attach; 237 static device_detach_t uchcom_detach; 238 static void uchcom_free_softc(struct uchcom_softc *); 239 240 static usb_callback_t uchcom_intr_callback; 241 static usb_callback_t uchcom_write_callback; 242 static usb_callback_t uchcom_read_callback; 243 244 static const struct usb_config uchcom_config_data[UCHCOM_N_TRANSFER] = { 245 246 [UCHCOM_BULK_DT_WR] = { 247 .type = UE_BULK, 248 .endpoint = UE_ADDR_ANY, 249 .direction = UE_DIR_OUT, 250 .bufsize = UCHCOM_BULK_BUF_SIZE, 251 .flags = {.pipe_bof = 1,.force_short_xfer = 1,}, 252 .callback = &uchcom_write_callback, 253 }, 254 255 [UCHCOM_BULK_DT_RD] = { 256 .type = UE_BULK, 257 .endpoint = UE_ADDR_ANY, 258 .direction = UE_DIR_IN, 259 .bufsize = UCHCOM_BULK_BUF_SIZE, 260 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 261 .callback = &uchcom_read_callback, 262 }, 263 264 [UCHCOM_INTR_DT_RD] = { 265 .type = UE_INTERRUPT, 266 .endpoint = UE_ADDR_ANY, 267 .direction = UE_DIR_IN, 268 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 269 .bufsize = 0, /* use wMaxPacketSize */ 270 .callback = &uchcom_intr_callback, 271 }, 272 }; 273 274 static struct ucom_callback uchcom_callback = { 275 .ucom_cfg_get_status = &uchcom_cfg_get_status, 276 .ucom_cfg_set_dtr = &uchcom_cfg_set_dtr, 277 .ucom_cfg_set_rts = &uchcom_cfg_set_rts, 278 .ucom_cfg_set_break = &uchcom_cfg_set_break, 279 .ucom_cfg_open = &uchcom_cfg_open, 280 .ucom_cfg_param = &uchcom_cfg_param, 281 .ucom_pre_param = &uchcom_pre_param, 282 .ucom_start_read = &uchcom_start_read, 283 .ucom_stop_read = &uchcom_stop_read, 284 .ucom_start_write = &uchcom_start_write, 285 .ucom_stop_write = &uchcom_stop_write, 286 .ucom_poll = &uchcom_poll, 287 .ucom_free = &uchcom_free, 288 }; 289 290 /* ---------------------------------------------------------------------- 291 * driver entry points 292 */ 293 294 static int 295 uchcom_probe(device_t dev) 296 { 297 struct usb_attach_arg *uaa = device_get_ivars(dev); 298 299 DPRINTFN(11, "\n"); 300 301 if (uaa->usb_mode != USB_MODE_HOST) { 302 return (ENXIO); 303 } 304 if (uaa->info.bConfigIndex != UCHCOM_CONFIG_INDEX) { 305 return (ENXIO); 306 } 307 if (uaa->info.bIfaceIndex != UCHCOM_IFACE_INDEX) { 308 return (ENXIO); 309 } 310 return (usbd_lookup_id_by_uaa(uchcom_devs, sizeof(uchcom_devs), uaa)); 311 } 312 313 static int 314 uchcom_attach(device_t dev) 315 { 316 struct uchcom_softc *sc = device_get_softc(dev); 317 struct usb_attach_arg *uaa = device_get_ivars(dev); 318 int error; 319 uint8_t iface_index; 320 321 DPRINTFN(11, "\n"); 322 323 device_set_usb_desc(dev); 324 mtx_init(&sc->sc_mtx, "uchcom", NULL, MTX_DEF); 325 ucom_ref(&sc->sc_super_ucom); 326 327 sc->sc_udev = uaa->device; 328 329 switch (uaa->info.bcdDevice) { 330 case UCHCOM_REV_CH340: 331 device_printf(dev, "CH340 detected\n"); 332 break; 333 default: 334 device_printf(dev, "CH341 detected\n"); 335 break; 336 } 337 338 iface_index = UCHCOM_IFACE_INDEX; 339 error = usbd_transfer_setup(uaa->device, 340 &iface_index, sc->sc_xfer, uchcom_config_data, 341 UCHCOM_N_TRANSFER, sc, &sc->sc_mtx); 342 343 if (error) { 344 DPRINTF("one or more missing USB endpoints, " 345 "error=%s\n", usbd_errstr(error)); 346 goto detach; 347 } 348 349 /* clear stall at first run */ 350 mtx_lock(&sc->sc_mtx); 351 usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 352 usbd_xfer_set_stall(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 353 mtx_unlock(&sc->sc_mtx); 354 355 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 356 &uchcom_callback, &sc->sc_mtx); 357 if (error) { 358 goto detach; 359 } 360 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 361 362 return (0); 363 364 detach: 365 uchcom_detach(dev); 366 return (ENXIO); 367 } 368 369 static int 370 uchcom_detach(device_t dev) 371 { 372 struct uchcom_softc *sc = device_get_softc(dev); 373 374 DPRINTFN(11, "\n"); 375 376 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 377 usbd_transfer_unsetup(sc->sc_xfer, UCHCOM_N_TRANSFER); 378 379 device_claim_softc(dev); 380 381 uchcom_free_softc(sc); 382 383 return (0); 384 } 385 386 UCOM_UNLOAD_DRAIN(uchcom); 387 388 static void 389 uchcom_free_softc(struct uchcom_softc *sc) 390 { 391 if (ucom_unref(&sc->sc_super_ucom)) { 392 mtx_destroy(&sc->sc_mtx); 393 device_free_softc(sc); 394 } 395 } 396 397 static void 398 uchcom_free(struct ucom_softc *ucom) 399 { 400 uchcom_free_softc(ucom->sc_parent); 401 } 402 403 /* ---------------------------------------------------------------------- 404 * low level i/o 405 */ 406 407 static void 408 uchcom_ctrl_write(struct uchcom_softc *sc, uint8_t reqno, 409 uint16_t value, uint16_t index) 410 { 411 struct usb_device_request req; 412 413 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 414 req.bRequest = reqno; 415 USETW(req.wValue, value); 416 USETW(req.wIndex, index); 417 USETW(req.wLength, 0); 418 419 ucom_cfg_do_request(sc->sc_udev, 420 &sc->sc_ucom, &req, NULL, 0, 1000); 421 } 422 423 static void 424 uchcom_ctrl_read(struct uchcom_softc *sc, uint8_t reqno, 425 uint16_t value, uint16_t index, void *buf, uint16_t buflen) 426 { 427 struct usb_device_request req; 428 429 req.bmRequestType = UT_READ_VENDOR_DEVICE; 430 req.bRequest = reqno; 431 USETW(req.wValue, value); 432 USETW(req.wIndex, index); 433 USETW(req.wLength, buflen); 434 435 ucom_cfg_do_request(sc->sc_udev, 436 &sc->sc_ucom, &req, buf, USB_SHORT_XFER_OK, 1000); 437 } 438 439 static void 440 uchcom_write_reg(struct uchcom_softc *sc, 441 uint8_t reg1, uint8_t val1, uint8_t reg2, uint8_t val2) 442 { 443 DPRINTF("0x%02X<-0x%02X, 0x%02X<-0x%02X\n", 444 (unsigned)reg1, (unsigned)val1, 445 (unsigned)reg2, (unsigned)val2); 446 uchcom_ctrl_write( 447 sc, UCHCOM_REQ_WRITE_REG, 448 reg1 | ((uint16_t)reg2 << 8), val1 | ((uint16_t)val2 << 8)); 449 } 450 451 static void 452 uchcom_read_reg(struct uchcom_softc *sc, 453 uint8_t reg1, uint8_t *rval1, uint8_t reg2, uint8_t *rval2) 454 { 455 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 456 457 uchcom_ctrl_read( 458 sc, UCHCOM_REQ_READ_REG, 459 reg1 | ((uint16_t)reg2 << 8), 0, buf, sizeof(buf)); 460 461 DPRINTF("0x%02X->0x%02X, 0x%02X->0x%02X\n", 462 (unsigned)reg1, (unsigned)buf[0], 463 (unsigned)reg2, (unsigned)buf[1]); 464 465 if (rval1) 466 *rval1 = buf[0]; 467 if (rval2) 468 *rval2 = buf[1]; 469 } 470 471 static void 472 uchcom_get_version(struct uchcom_softc *sc, uint8_t *rver) 473 { 474 uint8_t buf[UCHCOM_INPUT_BUF_SIZE]; 475 476 uchcom_ctrl_read(sc, UCHCOM_REQ_GET_VERSION, 0, 0, buf, sizeof(buf)); 477 478 if (rver) 479 *rver = buf[0]; 480 } 481 482 static void 483 uchcom_get_status(struct uchcom_softc *sc, uint8_t *rval) 484 { 485 uchcom_read_reg(sc, UCHCOM_REG_STAT1, rval, UCHCOM_REG_STAT2, NULL); 486 } 487 488 static void 489 uchcom_set_dtr_rts_10(struct uchcom_softc *sc, uint8_t val) 490 { 491 uchcom_write_reg(sc, UCHCOM_REG_STAT1, val, UCHCOM_REG_STAT1, val); 492 } 493 494 static void 495 uchcom_set_dtr_rts_20(struct uchcom_softc *sc, uint8_t val) 496 { 497 uchcom_ctrl_write(sc, UCHCOM_REQ_SET_DTRRTS, val, 0); 498 } 499 500 501 /* ---------------------------------------------------------------------- 502 * middle layer 503 */ 504 505 static void 506 uchcom_update_version(struct uchcom_softc *sc) 507 { 508 uchcom_get_version(sc, &sc->sc_version); 509 } 510 511 static void 512 uchcom_convert_status(struct uchcom_softc *sc, uint8_t cur) 513 { 514 sc->sc_dtr = !(cur & UCHCOM_DTR_MASK); 515 sc->sc_rts = !(cur & UCHCOM_RTS_MASK); 516 517 cur = ~cur & 0x0F; 518 sc->sc_msr = (cur << 4) | ((sc->sc_msr >> 4) ^ cur); 519 } 520 521 static void 522 uchcom_update_status(struct uchcom_softc *sc) 523 { 524 uint8_t cur; 525 526 uchcom_get_status(sc, &cur); 527 uchcom_convert_status(sc, cur); 528 } 529 530 531 static void 532 uchcom_set_dtr_rts(struct uchcom_softc *sc) 533 { 534 uint8_t val = 0; 535 536 if (sc->sc_dtr) 537 val |= UCHCOM_DTR_MASK; 538 if (sc->sc_rts) 539 val |= UCHCOM_RTS_MASK; 540 541 if (sc->sc_version < UCHCOM_VER_20) 542 uchcom_set_dtr_rts_10(sc, ~val); 543 else 544 uchcom_set_dtr_rts_20(sc, ~val); 545 } 546 547 static void 548 uchcom_cfg_set_break(struct ucom_softc *ucom, uint8_t onoff) 549 { 550 struct uchcom_softc *sc = ucom->sc_parent; 551 uint8_t brk1; 552 uint8_t brk2; 553 554 uchcom_read_reg(sc, UCHCOM_REG_BREAK1, &brk1, UCHCOM_REG_BREAK2, &brk2); 555 if (onoff) { 556 /* on - clear bits */ 557 brk1 &= ~UCHCOM_BRK1_MASK; 558 brk2 &= ~UCHCOM_BRK2_MASK; 559 } else { 560 /* off - set bits */ 561 brk1 |= UCHCOM_BRK1_MASK; 562 brk2 |= UCHCOM_BRK2_MASK; 563 } 564 uchcom_write_reg(sc, UCHCOM_REG_BREAK1, brk1, UCHCOM_REG_BREAK2, brk2); 565 } 566 567 static int 568 uchcom_calc_divider_settings(struct uchcom_divider *dp, uint32_t rate) 569 { 570 const struct uchcom_divider_record *rp; 571 uint32_t div; 572 uint32_t rem; 573 uint32_t mod; 574 uint8_t i; 575 576 /* find record */ 577 for (i = 0; i != NUM_DIVIDERS; i++) { 578 if (dividers[i].dvr_high >= rate && 579 dividers[i].dvr_low <= rate) { 580 rp = ÷rs[i]; 581 goto found; 582 } 583 } 584 return (-1); 585 586 found: 587 dp->dv_prescaler = rp->dvr_divider.dv_prescaler; 588 if (rp->dvr_base_clock == UCHCOM_BASE_UNKNOWN) 589 dp->dv_div = rp->dvr_divider.dv_div; 590 else { 591 div = rp->dvr_base_clock / rate; 592 rem = rp->dvr_base_clock % rate; 593 if (div == 0 || div >= 0xFF) 594 return (-1); 595 if ((rem << 1) >= rate) 596 div += 1; 597 dp->dv_div = (uint8_t)-div; 598 } 599 600 mod = (UCHCOM_BPS_MOD_BASE / rate) + UCHCOM_BPS_MOD_BASE_OFS; 601 mod = mod + (mod / 2); 602 603 dp->dv_mod = (mod + 0xFF) / 0x100; 604 605 return (0); 606 } 607 608 static void 609 uchcom_set_baudrate(struct uchcom_softc *sc, uint32_t rate) 610 { 611 struct uchcom_divider dv; 612 613 if (uchcom_calc_divider_settings(&dv, rate)) 614 return; 615 616 uchcom_write_reg(sc, 617 UCHCOM_REG_BPS_PRE, dv.dv_prescaler, 618 UCHCOM_REG_BPS_DIV, dv.dv_div); 619 uchcom_write_reg(sc, 620 UCHCOM_REG_BPS_MOD, dv.dv_mod, 621 UCHCOM_REG_BPS_PAD, 0); 622 } 623 624 /* ---------------------------------------------------------------------- 625 * methods for ucom 626 */ 627 static void 628 uchcom_cfg_get_status(struct ucom_softc *ucom, uint8_t *lsr, uint8_t *msr) 629 { 630 struct uchcom_softc *sc = ucom->sc_parent; 631 632 DPRINTF("\n"); 633 634 *lsr = sc->sc_lsr; 635 *msr = sc->sc_msr; 636 } 637 638 static void 639 uchcom_cfg_set_dtr(struct ucom_softc *ucom, uint8_t onoff) 640 { 641 struct uchcom_softc *sc = ucom->sc_parent; 642 643 DPRINTF("onoff = %d\n", onoff); 644 645 sc->sc_dtr = onoff; 646 uchcom_set_dtr_rts(sc); 647 } 648 649 static void 650 uchcom_cfg_set_rts(struct ucom_softc *ucom, uint8_t onoff) 651 { 652 struct uchcom_softc *sc = ucom->sc_parent; 653 654 DPRINTF("onoff = %d\n", onoff); 655 656 sc->sc_rts = onoff; 657 uchcom_set_dtr_rts(sc); 658 } 659 660 static void 661 uchcom_cfg_open(struct ucom_softc *ucom) 662 { 663 struct uchcom_softc *sc = ucom->sc_parent; 664 665 DPRINTF("\n"); 666 667 uchcom_update_version(sc); 668 uchcom_update_status(sc); 669 } 670 671 static int 672 uchcom_pre_param(struct ucom_softc *ucom, struct termios *t) 673 { 674 struct uchcom_divider dv; 675 676 switch (t->c_cflag & CSIZE) { 677 case CS8: 678 break; 679 default: 680 return (EIO); 681 } 682 683 if (uchcom_calc_divider_settings(&dv, t->c_ospeed)) { 684 return (EIO); 685 } 686 return (0); /* success */ 687 } 688 689 static void 690 uchcom_cfg_param(struct ucom_softc *ucom, struct termios *t) 691 { 692 struct uchcom_softc *sc = ucom->sc_parent; 693 694 uchcom_get_version(sc, 0); 695 uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0, 0); 696 uchcom_set_baudrate(sc, t->c_ospeed); 697 uchcom_read_reg(sc, 0x18, 0, 0x25, 0); 698 uchcom_write_reg(sc, 0x18, 0x50, 0x25, 0x00); 699 uchcom_update_status(sc); 700 uchcom_ctrl_write(sc, UCHCOM_REQ_RESET, 0x501f, 0xd90a); 701 uchcom_set_baudrate(sc, t->c_ospeed); 702 uchcom_set_dtr_rts(sc); 703 uchcom_update_status(sc); 704 } 705 706 static void 707 uchcom_start_read(struct ucom_softc *ucom) 708 { 709 struct uchcom_softc *sc = ucom->sc_parent; 710 711 /* start interrupt endpoint */ 712 usbd_transfer_start(sc->sc_xfer[UCHCOM_INTR_DT_RD]); 713 714 /* start read endpoint */ 715 usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 716 } 717 718 static void 719 uchcom_stop_read(struct ucom_softc *ucom) 720 { 721 struct uchcom_softc *sc = ucom->sc_parent; 722 723 /* stop interrupt endpoint */ 724 usbd_transfer_stop(sc->sc_xfer[UCHCOM_INTR_DT_RD]); 725 726 /* stop read endpoint */ 727 usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_RD]); 728 } 729 730 static void 731 uchcom_start_write(struct ucom_softc *ucom) 732 { 733 struct uchcom_softc *sc = ucom->sc_parent; 734 735 usbd_transfer_start(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 736 } 737 738 static void 739 uchcom_stop_write(struct ucom_softc *ucom) 740 { 741 struct uchcom_softc *sc = ucom->sc_parent; 742 743 usbd_transfer_stop(sc->sc_xfer[UCHCOM_BULK_DT_WR]); 744 } 745 746 /* ---------------------------------------------------------------------- 747 * callback when the modem status is changed. 748 */ 749 static void 750 uchcom_intr_callback(struct usb_xfer *xfer, usb_error_t error) 751 { 752 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 753 struct usb_page_cache *pc; 754 uint8_t buf[UCHCOM_INTR_LEAST]; 755 int actlen; 756 757 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 758 759 switch (USB_GET_STATE(xfer)) { 760 case USB_ST_TRANSFERRED: 761 762 DPRINTF("actlen = %u\n", actlen); 763 764 if (actlen >= UCHCOM_INTR_LEAST) { 765 pc = usbd_xfer_get_frame(xfer, 0); 766 usbd_copy_out(pc, 0, buf, UCHCOM_INTR_LEAST); 767 768 DPRINTF("data = 0x%02X 0x%02X 0x%02X 0x%02X\n", 769 (unsigned)buf[0], (unsigned)buf[1], 770 (unsigned)buf[2], (unsigned)buf[3]); 771 772 uchcom_convert_status(sc, buf[UCHCOM_INTR_STAT1]); 773 ucom_status_change(&sc->sc_ucom); 774 } 775 case USB_ST_SETUP: 776 tr_setup: 777 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 778 usbd_transfer_submit(xfer); 779 break; 780 781 default: /* Error */ 782 if (error != USB_ERR_CANCELLED) { 783 /* try to clear stall first */ 784 usbd_xfer_set_stall(xfer); 785 goto tr_setup; 786 } 787 break; 788 } 789 } 790 791 static void 792 uchcom_write_callback(struct usb_xfer *xfer, usb_error_t error) 793 { 794 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 795 struct usb_page_cache *pc; 796 uint32_t actlen; 797 798 switch (USB_GET_STATE(xfer)) { 799 case USB_ST_SETUP: 800 case USB_ST_TRANSFERRED: 801 tr_setup: 802 pc = usbd_xfer_get_frame(xfer, 0); 803 if (ucom_get_data(&sc->sc_ucom, pc, 0, 804 usbd_xfer_max_len(xfer), &actlen)) { 805 806 DPRINTF("actlen = %d\n", actlen); 807 808 usbd_xfer_set_frame_len(xfer, 0, actlen); 809 usbd_transfer_submit(xfer); 810 } 811 break; 812 813 default: /* Error */ 814 if (error != USB_ERR_CANCELLED) { 815 /* try to clear stall first */ 816 usbd_xfer_set_stall(xfer); 817 goto tr_setup; 818 } 819 break; 820 } 821 } 822 823 static void 824 uchcom_read_callback(struct usb_xfer *xfer, usb_error_t error) 825 { 826 struct uchcom_softc *sc = usbd_xfer_softc(xfer); 827 struct usb_page_cache *pc; 828 int actlen; 829 830 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 831 832 switch (USB_GET_STATE(xfer)) { 833 case USB_ST_TRANSFERRED: 834 835 if (actlen > 0) { 836 pc = usbd_xfer_get_frame(xfer, 0); 837 ucom_put_data(&sc->sc_ucom, pc, 0, actlen); 838 } 839 840 case USB_ST_SETUP: 841 tr_setup: 842 usbd_xfer_set_frame_len(xfer, 0, usbd_xfer_max_len(xfer)); 843 usbd_transfer_submit(xfer); 844 break; 845 846 default: /* Error */ 847 if (error != USB_ERR_CANCELLED) { 848 /* try to clear stall first */ 849 usbd_xfer_set_stall(xfer); 850 goto tr_setup; 851 } 852 break; 853 } 854 } 855 856 static void 857 uchcom_poll(struct ucom_softc *ucom) 858 { 859 struct uchcom_softc *sc = ucom->sc_parent; 860 usbd_transfer_poll(sc->sc_xfer, UCHCOM_N_TRANSFER); 861 } 862 863 static device_method_t uchcom_methods[] = { 864 /* Device interface */ 865 DEVMETHOD(device_probe, uchcom_probe), 866 DEVMETHOD(device_attach, uchcom_attach), 867 DEVMETHOD(device_detach, uchcom_detach), 868 DEVMETHOD_END 869 }; 870 871 static driver_t uchcom_driver = { 872 .name = "ucom", 873 .methods = uchcom_methods, 874 .size = sizeof(struct uchcom_softc) 875 }; 876 877 static devclass_t uchcom_devclass; 878 879 DRIVER_MODULE(uchcom, uhub, uchcom_driver, uchcom_devclass, NULL, 0); 880 MODULE_DEPEND(uchcom, ucom, 1, 1, 1); 881 MODULE_DEPEND(uchcom, usb, 1, 1, 1); 882 MODULE_VERSION(uchcom, 1); 883