1 #include <sys/cdefs.h> 2 __FBSDID("$FreeBSD$"); 3 4 /*- 5 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 6 * 7 * Copyright (c) 2004 Dag-Erling Coïdan Smørgrav 8 * All rights reserved. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer 15 * in this position and unchanged. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 27 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 31 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* 35 * Device driver for Cypress CY7C637xx and CY7C640/1xx series USB to 36 * RS232 bridges. 37 */ 38 39 #include <sys/stdint.h> 40 #include <sys/stddef.h> 41 #include <sys/param.h> 42 #include <sys/queue.h> 43 #include <sys/types.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/bus.h> 47 #include <sys/module.h> 48 #include <sys/lock.h> 49 #include <sys/mutex.h> 50 #include <sys/condvar.h> 51 #include <sys/sysctl.h> 52 #include <sys/sx.h> 53 #include <sys/unistd.h> 54 #include <sys/callout.h> 55 #include <sys/malloc.h> 56 #include <sys/priv.h> 57 58 #include <dev/hid/hid.h> 59 60 #include <dev/usb/usb.h> 61 #include <dev/usb/usbdi.h> 62 #include <dev/usb/usbdi_util.h> 63 #include <dev/usb/usbhid.h> 64 #include "usbdevs.h" 65 66 #define USB_DEBUG_VAR usb_debug 67 #include <dev/usb/usb_debug.h> 68 #include <dev/usb/usb_process.h> 69 70 #include <dev/usb/serial/usb_serial.h> 71 72 #define UCYCOM_MAX_IOLEN (1024 + 2) /* bytes */ 73 74 #define UCYCOM_IFACE_INDEX 0 75 76 enum { 77 UCYCOM_CTRL_RD, 78 UCYCOM_INTR_RD, 79 UCYCOM_N_TRANSFER, 80 }; 81 82 struct ucycom_softc { 83 struct ucom_super_softc sc_super_ucom; 84 struct ucom_softc sc_ucom; 85 86 struct usb_device *sc_udev; 87 struct usb_xfer *sc_xfer[UCYCOM_N_TRANSFER]; 88 struct mtx sc_mtx; 89 90 uint32_t sc_model; 91 #define MODEL_CY7C63743 0x63743 92 #define MODEL_CY7C64013 0x64013 93 94 uint16_t sc_flen; /* feature report length */ 95 uint16_t sc_ilen; /* input report length */ 96 uint16_t sc_olen; /* output report length */ 97 98 uint8_t sc_fid; /* feature report id */ 99 uint8_t sc_iid; /* input report id */ 100 uint8_t sc_oid; /* output report id */ 101 uint8_t sc_cfg; 102 #define UCYCOM_CFG_RESET 0x80 103 #define UCYCOM_CFG_PARODD 0x20 104 #define UCYCOM_CFG_PAREN 0x10 105 #define UCYCOM_CFG_STOPB 0x08 106 #define UCYCOM_CFG_DATAB 0x03 107 uint8_t sc_ist; /* status flags from last input */ 108 uint8_t sc_iface_no; 109 uint8_t sc_temp_cfg[32]; 110 }; 111 112 /* prototypes */ 113 114 static device_probe_t ucycom_probe; 115 static device_attach_t ucycom_attach; 116 static device_detach_t ucycom_detach; 117 static void ucycom_free_softc(struct ucycom_softc *); 118 119 static usb_callback_t ucycom_ctrl_write_callback; 120 static usb_callback_t ucycom_intr_read_callback; 121 122 static void ucycom_free(struct ucom_softc *); 123 static void ucycom_cfg_open(struct ucom_softc *); 124 static void ucycom_start_read(struct ucom_softc *); 125 static void ucycom_stop_read(struct ucom_softc *); 126 static void ucycom_start_write(struct ucom_softc *); 127 static void ucycom_stop_write(struct ucom_softc *); 128 static void ucycom_cfg_write(struct ucycom_softc *, uint32_t, uint8_t); 129 static int ucycom_pre_param(struct ucom_softc *, struct termios *); 130 static void ucycom_cfg_param(struct ucom_softc *, struct termios *); 131 static void ucycom_poll(struct ucom_softc *ucom); 132 133 static const struct usb_config ucycom_config[UCYCOM_N_TRANSFER] = { 134 [UCYCOM_CTRL_RD] = { 135 .type = UE_CONTROL, 136 .endpoint = 0x00, /* Control pipe */ 137 .direction = UE_DIR_ANY, 138 .bufsize = (sizeof(struct usb_device_request) + UCYCOM_MAX_IOLEN), 139 .callback = &ucycom_ctrl_write_callback, 140 .timeout = 1000, /* 1 second */ 141 }, 142 143 [UCYCOM_INTR_RD] = { 144 .type = UE_INTERRUPT, 145 .endpoint = UE_ADDR_ANY, 146 .direction = UE_DIR_IN, 147 .flags = {.pipe_bof = 1,.short_xfer_ok = 1,}, 148 .bufsize = UCYCOM_MAX_IOLEN, 149 .callback = &ucycom_intr_read_callback, 150 }, 151 }; 152 153 static const struct ucom_callback ucycom_callback = { 154 .ucom_cfg_param = &ucycom_cfg_param, 155 .ucom_cfg_open = &ucycom_cfg_open, 156 .ucom_pre_param = &ucycom_pre_param, 157 .ucom_start_read = &ucycom_start_read, 158 .ucom_stop_read = &ucycom_stop_read, 159 .ucom_start_write = &ucycom_start_write, 160 .ucom_stop_write = &ucycom_stop_write, 161 .ucom_poll = &ucycom_poll, 162 .ucom_free = &ucycom_free, 163 }; 164 165 static device_method_t ucycom_methods[] = { 166 DEVMETHOD(device_probe, ucycom_probe), 167 DEVMETHOD(device_attach, ucycom_attach), 168 DEVMETHOD(device_detach, ucycom_detach), 169 DEVMETHOD_END 170 }; 171 172 static driver_t ucycom_driver = { 173 .name = "ucycom", 174 .methods = ucycom_methods, 175 .size = sizeof(struct ucycom_softc), 176 }; 177 178 /* 179 * Supported devices 180 */ 181 static const STRUCT_USB_HOST_ID ucycom_devs[] = { 182 {USB_VPI(USB_VENDOR_DELORME, USB_PRODUCT_DELORME_EARTHMATE, MODEL_CY7C64013)}, 183 }; 184 185 DRIVER_MODULE(ucycom, uhub, ucycom_driver, NULL, NULL); 186 MODULE_DEPEND(ucycom, ucom, 1, 1, 1); 187 MODULE_DEPEND(ucycom, usb, 1, 1, 1); 188 MODULE_DEPEND(ucycom, hid, 1, 1, 1); 189 MODULE_VERSION(ucycom, 1); 190 USB_PNP_HOST_INFO(ucycom_devs); 191 192 #define UCYCOM_DEFAULT_RATE 4800 193 #define UCYCOM_DEFAULT_CFG 0x03 /* N-8-1 */ 194 195 static int 196 ucycom_probe(device_t dev) 197 { 198 struct usb_attach_arg *uaa = device_get_ivars(dev); 199 200 if (uaa->usb_mode != USB_MODE_HOST) { 201 return (ENXIO); 202 } 203 if (uaa->info.bConfigIndex != 0) { 204 return (ENXIO); 205 } 206 if (uaa->info.bIfaceIndex != UCYCOM_IFACE_INDEX) { 207 return (ENXIO); 208 } 209 return (usbd_lookup_id_by_uaa(ucycom_devs, sizeof(ucycom_devs), uaa)); 210 } 211 212 static int 213 ucycom_attach(device_t dev) 214 { 215 struct usb_attach_arg *uaa = device_get_ivars(dev); 216 struct ucycom_softc *sc = device_get_softc(dev); 217 void *urd_ptr = NULL; 218 int32_t error; 219 uint16_t urd_len; 220 uint8_t iface_index; 221 222 sc->sc_udev = uaa->device; 223 224 device_set_usb_desc(dev); 225 mtx_init(&sc->sc_mtx, "ucycom", NULL, MTX_DEF); 226 ucom_ref(&sc->sc_super_ucom); 227 228 DPRINTF("\n"); 229 230 /* get chip model */ 231 sc->sc_model = USB_GET_DRIVER_INFO(uaa); 232 if (sc->sc_model == 0) { 233 device_printf(dev, "unsupported device\n"); 234 goto detach; 235 } 236 device_printf(dev, "Cypress CY7C%X USB to RS232 bridge\n", sc->sc_model); 237 238 /* get report descriptor */ 239 240 error = usbd_req_get_hid_desc(uaa->device, NULL, 241 &urd_ptr, &urd_len, M_USBDEV, 242 UCYCOM_IFACE_INDEX); 243 244 if (error) { 245 device_printf(dev, "failed to get report " 246 "descriptor: %s\n", 247 usbd_errstr(error)); 248 goto detach; 249 } 250 /* get report sizes */ 251 252 sc->sc_flen = hid_report_size_max(urd_ptr, urd_len, hid_feature, &sc->sc_fid); 253 sc->sc_ilen = hid_report_size_max(urd_ptr, urd_len, hid_input, &sc->sc_iid); 254 sc->sc_olen = hid_report_size_max(urd_ptr, urd_len, hid_output, &sc->sc_oid); 255 256 if ((sc->sc_ilen > UCYCOM_MAX_IOLEN) || (sc->sc_ilen < 1) || 257 (sc->sc_olen > UCYCOM_MAX_IOLEN) || (sc->sc_olen < 2) || 258 (sc->sc_flen > UCYCOM_MAX_IOLEN) || (sc->sc_flen < 5)) { 259 device_printf(dev, "invalid report size i=%d, o=%d, f=%d, max=%d\n", 260 sc->sc_ilen, sc->sc_olen, sc->sc_flen, 261 UCYCOM_MAX_IOLEN); 262 goto detach; 263 } 264 sc->sc_iface_no = uaa->info.bIfaceNum; 265 266 iface_index = UCYCOM_IFACE_INDEX; 267 error = usbd_transfer_setup(uaa->device, &iface_index, 268 sc->sc_xfer, ucycom_config, UCYCOM_N_TRANSFER, 269 sc, &sc->sc_mtx); 270 if (error) { 271 device_printf(dev, "allocating USB " 272 "transfers failed\n"); 273 goto detach; 274 } 275 error = ucom_attach(&sc->sc_super_ucom, &sc->sc_ucom, 1, sc, 276 &ucycom_callback, &sc->sc_mtx); 277 if (error) { 278 goto detach; 279 } 280 ucom_set_pnpinfo_usb(&sc->sc_super_ucom, dev); 281 282 if (urd_ptr) { 283 free(urd_ptr, M_USBDEV); 284 } 285 286 return (0); /* success */ 287 288 detach: 289 if (urd_ptr) { 290 free(urd_ptr, M_USBDEV); 291 } 292 ucycom_detach(dev); 293 return (ENXIO); 294 } 295 296 static int 297 ucycom_detach(device_t dev) 298 { 299 struct ucycom_softc *sc = device_get_softc(dev); 300 301 ucom_detach(&sc->sc_super_ucom, &sc->sc_ucom); 302 usbd_transfer_unsetup(sc->sc_xfer, UCYCOM_N_TRANSFER); 303 304 device_claim_softc(dev); 305 306 ucycom_free_softc(sc); 307 308 return (0); 309 } 310 311 UCOM_UNLOAD_DRAIN(ucycom); 312 313 static void 314 ucycom_free_softc(struct ucycom_softc *sc) 315 { 316 if (ucom_unref(&sc->sc_super_ucom)) { 317 mtx_destroy(&sc->sc_mtx); 318 device_free_softc(sc); 319 } 320 } 321 322 static void 323 ucycom_free(struct ucom_softc *ucom) 324 { 325 ucycom_free_softc(ucom->sc_parent); 326 } 327 328 static void 329 ucycom_cfg_open(struct ucom_softc *ucom) 330 { 331 struct ucycom_softc *sc = ucom->sc_parent; 332 333 /* set default configuration */ 334 ucycom_cfg_write(sc, UCYCOM_DEFAULT_RATE, UCYCOM_DEFAULT_CFG); 335 } 336 337 static void 338 ucycom_start_read(struct ucom_softc *ucom) 339 { 340 struct ucycom_softc *sc = ucom->sc_parent; 341 342 usbd_transfer_start(sc->sc_xfer[UCYCOM_INTR_RD]); 343 } 344 345 static void 346 ucycom_stop_read(struct ucom_softc *ucom) 347 { 348 struct ucycom_softc *sc = ucom->sc_parent; 349 350 usbd_transfer_stop(sc->sc_xfer[UCYCOM_INTR_RD]); 351 } 352 353 static void 354 ucycom_start_write(struct ucom_softc *ucom) 355 { 356 struct ucycom_softc *sc = ucom->sc_parent; 357 358 usbd_transfer_start(sc->sc_xfer[UCYCOM_CTRL_RD]); 359 } 360 361 static void 362 ucycom_stop_write(struct ucom_softc *ucom) 363 { 364 struct ucycom_softc *sc = ucom->sc_parent; 365 366 usbd_transfer_stop(sc->sc_xfer[UCYCOM_CTRL_RD]); 367 } 368 369 static void 370 ucycom_ctrl_write_callback(struct usb_xfer *xfer, usb_error_t error) 371 { 372 struct ucycom_softc *sc = usbd_xfer_softc(xfer); 373 struct usb_device_request req; 374 struct usb_page_cache *pc0, *pc1; 375 uint8_t data[2]; 376 uint8_t offset; 377 uint32_t actlen; 378 379 pc0 = usbd_xfer_get_frame(xfer, 0); 380 pc1 = usbd_xfer_get_frame(xfer, 1); 381 382 switch (USB_GET_STATE(xfer)) { 383 case USB_ST_TRANSFERRED: 384 tr_transferred: 385 case USB_ST_SETUP: 386 387 switch (sc->sc_model) { 388 case MODEL_CY7C63743: 389 offset = 1; 390 break; 391 case MODEL_CY7C64013: 392 offset = 2; 393 break; 394 default: 395 offset = 0; 396 break; 397 } 398 399 if (ucom_get_data(&sc->sc_ucom, pc1, offset, 400 sc->sc_olen - offset, &actlen)) { 401 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 402 req.bRequest = UR_SET_REPORT; 403 USETW2(req.wValue, UHID_OUTPUT_REPORT, sc->sc_oid); 404 req.wIndex[0] = sc->sc_iface_no; 405 req.wIndex[1] = 0; 406 USETW(req.wLength, sc->sc_olen); 407 408 switch (sc->sc_model) { 409 case MODEL_CY7C63743: 410 data[0] = actlen; 411 break; 412 case MODEL_CY7C64013: 413 data[0] = 0; 414 data[1] = actlen; 415 break; 416 default: 417 break; 418 } 419 420 usbd_copy_in(pc0, 0, &req, sizeof(req)); 421 usbd_copy_in(pc1, 0, data, offset); 422 423 usbd_xfer_set_frame_len(xfer, 0, sizeof(req)); 424 usbd_xfer_set_frame_len(xfer, 1, sc->sc_olen); 425 usbd_xfer_set_frames(xfer, sc->sc_olen ? 2 : 1); 426 usbd_transfer_submit(xfer); 427 } 428 return; 429 430 default: /* Error */ 431 if (error == USB_ERR_CANCELLED) { 432 return; 433 } 434 DPRINTF("error=%s\n", 435 usbd_errstr(error)); 436 goto tr_transferred; 437 } 438 } 439 440 static void 441 ucycom_cfg_write(struct ucycom_softc *sc, uint32_t baud, uint8_t cfg) 442 { 443 struct usb_device_request req; 444 uint16_t len; 445 usb_error_t err; 446 447 len = sc->sc_flen; 448 if (len > sizeof(sc->sc_temp_cfg)) { 449 len = sizeof(sc->sc_temp_cfg); 450 } 451 sc->sc_cfg = cfg; 452 453 req.bmRequestType = UT_WRITE_CLASS_INTERFACE; 454 req.bRequest = UR_SET_REPORT; 455 USETW2(req.wValue, UHID_FEATURE_REPORT, sc->sc_fid); 456 req.wIndex[0] = sc->sc_iface_no; 457 req.wIndex[1] = 0; 458 USETW(req.wLength, len); 459 460 sc->sc_temp_cfg[0] = (baud & 0xff); 461 sc->sc_temp_cfg[1] = (baud >> 8) & 0xff; 462 sc->sc_temp_cfg[2] = (baud >> 16) & 0xff; 463 sc->sc_temp_cfg[3] = (baud >> 24) & 0xff; 464 sc->sc_temp_cfg[4] = cfg; 465 466 err = ucom_cfg_do_request(sc->sc_udev, &sc->sc_ucom, 467 &req, sc->sc_temp_cfg, 0, 1000); 468 if (err) { 469 DPRINTFN(0, "device request failed, err=%s " 470 "(ignored)\n", usbd_errstr(err)); 471 } 472 } 473 474 static int 475 ucycom_pre_param(struct ucom_softc *ucom, struct termios *t) 476 { 477 switch (t->c_ospeed) { 478 case 600: 479 case 1200: 480 case 2400: 481 case 4800: 482 case 9600: 483 case 19200: 484 case 38400: 485 case 57600: 486 #if 0 487 /* 488 * Stock chips only support standard baud rates in the 600 - 57600 489 * range, but higher rates can be achieved using custom firmware. 490 */ 491 case 115200: 492 case 153600: 493 case 192000: 494 #endif 495 break; 496 default: 497 return (EINVAL); 498 } 499 return (0); 500 } 501 502 static void 503 ucycom_cfg_param(struct ucom_softc *ucom, struct termios *t) 504 { 505 struct ucycom_softc *sc = ucom->sc_parent; 506 uint8_t cfg; 507 508 DPRINTF("\n"); 509 510 if (t->c_cflag & CIGNORE) { 511 cfg = sc->sc_cfg; 512 } else { 513 cfg = 0; 514 switch (t->c_cflag & CSIZE) { 515 default: 516 case CS8: 517 ++cfg; 518 case CS7: 519 ++cfg; 520 case CS6: 521 ++cfg; 522 case CS5: 523 break; 524 } 525 526 if (t->c_cflag & CSTOPB) 527 cfg |= UCYCOM_CFG_STOPB; 528 if (t->c_cflag & PARENB) 529 cfg |= UCYCOM_CFG_PAREN; 530 if (t->c_cflag & PARODD) 531 cfg |= UCYCOM_CFG_PARODD; 532 } 533 534 ucycom_cfg_write(sc, t->c_ospeed, cfg); 535 } 536 537 static void 538 ucycom_intr_read_callback(struct usb_xfer *xfer, usb_error_t error) 539 { 540 struct ucycom_softc *sc = usbd_xfer_softc(xfer); 541 struct usb_page_cache *pc; 542 uint8_t buf[2]; 543 uint32_t offset; 544 int len; 545 int actlen; 546 547 usbd_xfer_status(xfer, &actlen, NULL, NULL, NULL); 548 pc = usbd_xfer_get_frame(xfer, 0); 549 550 switch (USB_GET_STATE(xfer)) { 551 case USB_ST_TRANSFERRED: 552 switch (sc->sc_model) { 553 case MODEL_CY7C63743: 554 if (actlen < 1) { 555 goto tr_setup; 556 } 557 usbd_copy_out(pc, 0, buf, 1); 558 559 sc->sc_ist = buf[0] & ~0x07; 560 len = buf[0] & 0x07; 561 562 actlen--; 563 offset = 1; 564 565 break; 566 567 case MODEL_CY7C64013: 568 if (actlen < 2) { 569 goto tr_setup; 570 } 571 usbd_copy_out(pc, 0, buf, 2); 572 573 sc->sc_ist = buf[0] & ~0x07; 574 len = buf[1]; 575 576 actlen -= 2; 577 offset = 2; 578 579 break; 580 581 default: 582 DPRINTFN(0, "unsupported model number\n"); 583 goto tr_setup; 584 } 585 586 if (len > actlen) 587 len = actlen; 588 if (len) 589 ucom_put_data(&sc->sc_ucom, pc, offset, len); 590 /* FALLTHROUGH */ 591 case USB_ST_SETUP: 592 tr_setup: 593 usbd_xfer_set_frame_len(xfer, 0, sc->sc_ilen); 594 usbd_transfer_submit(xfer); 595 return; 596 597 default: /* Error */ 598 if (error != USB_ERR_CANCELLED) { 599 /* try to clear stall first */ 600 usbd_xfer_set_stall(xfer); 601 goto tr_setup; 602 } 603 return; 604 } 605 } 606 607 static void 608 ucycom_poll(struct ucom_softc *ucom) 609 { 610 struct ucycom_softc *sc = ucom->sc_parent; 611 usbd_transfer_poll(sc->sc_xfer, UCYCOM_N_TRANSFER); 612 } 613