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