Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/usb/uftdi.c
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1 /* $NetBSD: uftdi.c,v 1.20 2004/01/28 21:50:28 augustss Exp $ */ 2 3 /* 4 * Copyright (c) 2000 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Lennart Augustsson (lennart@augustsson.net). 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 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * FTDI FT8U100AX serial adapter driver 41 */ 42 43 /* 44 * XXX This driver will not support multiple serial ports. 45 * XXX The ucom layer needs to be extended first. 46 */ 47 48 #include <sys/cdefs.h> 49 __KERNEL_RCSID(0, "$NetBSD: uftdi.c,v 1.20 2004/01/28 21:50:28 augustss Exp $"); 50 51 #include <sys/param.h> 52 #include <sys/systm.h> 53 #include <sys/kernel.h> 54 #include <sys/device.h> 55 #include <sys/conf.h> 56 #include <sys/tty.h> 57 58 #include <dev/usb/usb.h> 59 #include <dev/usb/usbhid.h> 60 61 #include <dev/usb/usbdi.h> 62 #include <dev/usb/usbdi_util.h> 63 #include <dev/usb/usbdevs.h> 64 65 #include <dev/usb/ucomvar.h> 66 67 #include <dev/usb/uftdireg.h> 68 69 #ifdef UFTDI_DEBUG 70 #define DPRINTF(x) if (uftdidebug) printf x 71 #define DPRINTFN(n,x) if (uftdidebug>(n)) printf x 72 int uftdidebug = 0; 73 #else 74 #define DPRINTF(x) 75 #define DPRINTFN(n,x) 76 #endif 77 78 #define UFTDI_CONFIG_INDEX 0 79 #define UFTDI_IFACE_INDEX 0 80 81 82 /* 83 * These are the maximum number of bytes transferred per frame. 84 * The output buffer size cannot be increased due to the size encoding. 85 */ 86 #define UFTDIIBUFSIZE 64 87 #define UFTDIOBUFSIZE 64 88 89 struct uftdi_softc { 90 USBBASEDEVICE sc_dev; /* base device */ 91 usbd_device_handle sc_udev; /* device */ 92 usbd_interface_handle sc_iface; /* interface */ 93 94 enum uftdi_type sc_type; 95 u_int sc_hdrlen; 96 97 u_char sc_msr; 98 u_char sc_lsr; 99 100 device_ptr_t sc_subdev; 101 102 u_char sc_dying; 103 104 u_int last_lcr; 105 }; 106 107 Static void uftdi_get_status(void *, int portno, u_char *lsr, u_char *msr); 108 Static void uftdi_set(void *, int, int, int); 109 Static int uftdi_param(void *, int, struct termios *); 110 Static int uftdi_open(void *sc, int portno); 111 Static void uftdi_read(void *sc, int portno, u_char **ptr,u_int32_t *count); 112 Static void uftdi_write(void *sc, int portno, u_char *to, u_char *from, 113 u_int32_t *count); 114 Static void uftdi_break(void *sc, int portno, int onoff); 115 116 struct ucom_methods uftdi_methods = { 117 uftdi_get_status, 118 uftdi_set, 119 uftdi_param, 120 NULL, 121 uftdi_open, 122 NULL, 123 uftdi_read, 124 uftdi_write, 125 }; 126 127 USB_DECLARE_DRIVER(uftdi); 128 129 USB_MATCH(uftdi) 130 { 131 USB_MATCH_START(uftdi, uaa); 132 133 if (uaa->iface != NULL) 134 return (UMATCH_NONE); 135 136 DPRINTFN(20,("uftdi: vendor=0x%x, product=0x%x\n", 137 uaa->vendor, uaa->product)); 138 139 if (uaa->vendor == USB_VENDOR_FTDI && 140 (uaa->product == USB_PRODUCT_FTDI_SERIAL_8U100AX || 141 uaa->product == USB_PRODUCT_FTDI_SERIAL_8U232AM || 142 uaa->product == USB_PRODUCT_FTDI_SEMC_DSS20 || 143 uaa->product == USB_PRODUCT_FTDI_LCD_LK202_24_USB || 144 uaa->product == USB_PRODUCT_FTDI_LCD_MX200_USB || 145 uaa->product == USB_PRODUCT_FTDI_CFA_631)) 146 return (UMATCH_VENDOR_PRODUCT); 147 148 return (UMATCH_NONE); 149 } 150 151 USB_ATTACH(uftdi) 152 { 153 USB_ATTACH_START(uftdi, sc, uaa); 154 usbd_device_handle dev = uaa->device; 155 usbd_interface_handle iface; 156 usb_interface_descriptor_t *id; 157 usb_endpoint_descriptor_t *ed; 158 char devinfo[1024]; 159 char *devname = USBDEVNAME(sc->sc_dev); 160 int i; 161 usbd_status err; 162 struct ucom_attach_args uca; 163 164 DPRINTFN(10,("\nuftdi_attach: sc=%p\n", sc)); 165 166 /* Move the device into the configured state. */ 167 err = usbd_set_config_index(dev, UFTDI_CONFIG_INDEX, 1); 168 if (err) { 169 printf("\n%s: failed to set configuration, err=%s\n", 170 devname, usbd_errstr(err)); 171 goto bad; 172 } 173 174 err = usbd_device2interface_handle(dev, UFTDI_IFACE_INDEX, &iface); 175 if (err) { 176 printf("\n%s: failed to get interface, err=%s\n", 177 devname, usbd_errstr(err)); 178 goto bad; 179 } 180 181 usbd_devinfo(dev, 0, devinfo); 182 USB_ATTACH_SETUP; 183 printf("%s: %s\n", devname, devinfo); 184 185 id = usbd_get_interface_descriptor(iface); 186 187 sc->sc_udev = dev; 188 sc->sc_iface = iface; 189 190 switch (uaa->product) { 191 case USB_PRODUCT_FTDI_SERIAL_8U100AX: 192 sc->sc_type = UFTDI_TYPE_SIO; 193 sc->sc_hdrlen = 1; 194 break; 195 196 case USB_PRODUCT_FTDI_SEMC_DSS20: 197 case USB_PRODUCT_FTDI_SERIAL_8U232AM: 198 case USB_PRODUCT_FTDI_LCD_LK202_24_USB: 199 case USB_PRODUCT_FTDI_LCD_MX200_USB: 200 case USB_PRODUCT_FTDI_CFA_631: 201 sc->sc_type = UFTDI_TYPE_8U232AM; 202 sc->sc_hdrlen = 0; 203 break; 204 205 default: /* Can't happen */ 206 goto bad; 207 } 208 209 uca.bulkin = uca.bulkout = -1; 210 for (i = 0; i < id->bNumEndpoints; i++) { 211 int addr, dir, attr; 212 ed = usbd_interface2endpoint_descriptor(iface, i); 213 if (ed == NULL) { 214 printf("%s: could not read endpoint descriptor" 215 ": %s\n", devname, usbd_errstr(err)); 216 goto bad; 217 } 218 219 addr = ed->bEndpointAddress; 220 dir = UE_GET_DIR(ed->bEndpointAddress); 221 attr = ed->bmAttributes & UE_XFERTYPE; 222 if (dir == UE_DIR_IN && attr == UE_BULK) 223 uca.bulkin = addr; 224 else if (dir == UE_DIR_OUT && attr == UE_BULK) 225 uca.bulkout = addr; 226 else { 227 printf("%s: unexpected endpoint\n", devname); 228 goto bad; 229 } 230 } 231 if (uca.bulkin == -1) { 232 printf("%s: Could not find data bulk in\n", 233 USBDEVNAME(sc->sc_dev)); 234 goto bad; 235 } 236 if (uca.bulkout == -1) { 237 printf("%s: Could not find data bulk out\n", 238 USBDEVNAME(sc->sc_dev)); 239 goto bad; 240 } 241 242 uca.portno = FTDI_PIT_SIOA; 243 /* bulkin, bulkout set above */ 244 uca.ibufsize = UFTDIIBUFSIZE; 245 uca.obufsize = UFTDIOBUFSIZE - sc->sc_hdrlen; 246 uca.ibufsizepad = UFTDIIBUFSIZE; 247 uca.opkthdrlen = sc->sc_hdrlen; 248 uca.device = dev; 249 uca.iface = iface; 250 uca.methods = &uftdi_methods; 251 uca.arg = sc; 252 uca.info = NULL; 253 254 usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, 255 USBDEV(sc->sc_dev)); 256 257 DPRINTF(("uftdi: in=0x%x out=0x%x\n", uca.bulkin, uca.bulkout)); 258 sc->sc_subdev = config_found_sm(self, &uca, ucomprint, ucomsubmatch); 259 260 USB_ATTACH_SUCCESS_RETURN; 261 262 bad: 263 DPRINTF(("uftdi_attach: ATTACH ERROR\n")); 264 sc->sc_dying = 1; 265 USB_ATTACH_ERROR_RETURN; 266 } 267 268 int 269 uftdi_activate(device_ptr_t self, enum devact act) 270 { 271 struct uftdi_softc *sc = (struct uftdi_softc *)self; 272 int rv = 0; 273 274 switch (act) { 275 case DVACT_ACTIVATE: 276 return (EOPNOTSUPP); 277 278 case DVACT_DEACTIVATE: 279 if (sc->sc_subdev != NULL) 280 rv = config_deactivate(sc->sc_subdev); 281 sc->sc_dying = 1; 282 break; 283 } 284 return (rv); 285 } 286 287 int 288 uftdi_detach(device_ptr_t self, int flags) 289 { 290 struct uftdi_softc *sc = (struct uftdi_softc *)self; 291 292 DPRINTF(("uftdi_detach: sc=%p flags=%d\n", sc, flags)); 293 sc->sc_dying = 1; 294 if (sc->sc_subdev != NULL) { 295 config_detach(sc->sc_subdev, flags); 296 sc->sc_subdev = NULL; 297 } 298 299 usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, 300 USBDEV(sc->sc_dev)); 301 302 return (0); 303 } 304 305 Static int 306 uftdi_open(void *vsc, int portno) 307 { 308 struct uftdi_softc *sc = vsc; 309 usb_device_request_t req; 310 usbd_status err; 311 struct termios t; 312 313 DPRINTF(("uftdi_open: sc=%p\n", sc)); 314 315 if (sc->sc_dying) 316 return (EIO); 317 318 /* Perform a full reset on the device */ 319 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 320 req.bRequest = FTDI_SIO_RESET; 321 USETW(req.wValue, FTDI_SIO_RESET_SIO); 322 USETW(req.wIndex, portno); 323 USETW(req.wLength, 0); 324 err = usbd_do_request(sc->sc_udev, &req, NULL); 325 if (err) 326 return (EIO); 327 328 /* Set 9600 baud, 2 stop bits, no parity, 8 bits */ 329 t.c_ospeed = 9600; 330 t.c_cflag = CSTOPB | CS8; 331 (void)uftdi_param(sc, portno, &t); 332 333 /* Turn on RTS/CTS flow control */ 334 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 335 req.bRequest = FTDI_SIO_SET_FLOW_CTRL; 336 USETW(req.wValue, 0); 337 USETW2(req.wIndex, FTDI_SIO_RTS_CTS_HS, portno); 338 USETW(req.wLength, 0); 339 err = usbd_do_request(sc->sc_udev, &req, NULL); 340 if (err) 341 return (EIO); 342 343 return (0); 344 } 345 346 Static void 347 uftdi_read(void *vsc, int portno, u_char **ptr, u_int32_t *count) 348 { 349 struct uftdi_softc *sc = vsc; 350 u_char msr, lsr; 351 352 DPRINTFN(15,("uftdi_read: sc=%p, port=%d count=%d\n", sc, portno, 353 *count)); 354 355 msr = FTDI_GET_MSR(*ptr); 356 lsr = FTDI_GET_LSR(*ptr); 357 358 #ifdef UFTDI_DEBUG 359 if (*count != 2) 360 DPRINTFN(10,("uftdi_read: sc=%p, port=%d count=%d data[0]=" 361 "0x%02x\n", sc, portno, *count, (*ptr)[2])); 362 #endif 363 364 if (sc->sc_msr != msr || 365 (sc->sc_lsr & FTDI_LSR_MASK) != (lsr & FTDI_LSR_MASK)) { 366 DPRINTF(("uftdi_read: status change msr=0x%02x(0x%02x) " 367 "lsr=0x%02x(0x%02x)\n", msr, sc->sc_msr, 368 lsr, sc->sc_lsr)); 369 sc->sc_msr = msr; 370 sc->sc_lsr = lsr; 371 ucom_status_change((struct ucom_softc *)sc->sc_subdev); 372 } 373 374 /* Pick up status and adjust data part. */ 375 *ptr += 2; 376 *count -= 2; 377 } 378 379 Static void 380 uftdi_write(void *vsc, int portno, u_char *to, u_char *from, u_int32_t *count) 381 { 382 struct uftdi_softc *sc = vsc; 383 384 DPRINTFN(10,("uftdi_write: sc=%p, port=%d count=%u data[0]=0x%02x\n", 385 vsc, portno, *count, from[0])); 386 387 /* Make length tag and copy data */ 388 if (sc->sc_hdrlen > 0) 389 *to = FTDI_OUT_TAG(*count, portno); 390 391 memcpy(to + sc->sc_hdrlen, from, *count); 392 *count += sc->sc_hdrlen; 393 } 394 395 Static void 396 uftdi_set(void *vsc, int portno, int reg, int onoff) 397 { 398 struct uftdi_softc *sc = vsc; 399 usb_device_request_t req; 400 int ctl; 401 402 DPRINTF(("uftdi_set: sc=%p, port=%d reg=%d onoff=%d\n", vsc, portno, 403 reg, onoff)); 404 405 switch (reg) { 406 case UCOM_SET_DTR: 407 ctl = onoff ? FTDI_SIO_SET_DTR_HIGH : FTDI_SIO_SET_DTR_LOW; 408 break; 409 case UCOM_SET_RTS: 410 ctl = onoff ? FTDI_SIO_SET_RTS_HIGH : FTDI_SIO_SET_RTS_LOW; 411 break; 412 case UCOM_SET_BREAK: 413 uftdi_break(sc, portno, onoff); 414 return; 415 default: 416 return; 417 } 418 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 419 req.bRequest = FTDI_SIO_MODEM_CTRL; 420 USETW(req.wValue, ctl); 421 USETW(req.wIndex, portno); 422 USETW(req.wLength, 0); 423 DPRINTFN(2,("uftdi_set: reqtype=0x%02x req=0x%02x value=0x%04x " 424 "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest, 425 UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength))); 426 (void)usbd_do_request(sc->sc_udev, &req, NULL); 427 } 428 429 Static int 430 uftdi_param(void *vsc, int portno, struct termios *t) 431 { 432 struct uftdi_softc *sc = vsc; 433 usb_device_request_t req; 434 usbd_status err; 435 int rate, data, flow; 436 437 DPRINTF(("uftdi_param: sc=%p\n", sc)); 438 439 if (sc->sc_dying) 440 return (EIO); 441 442 switch (sc->sc_type) { 443 case UFTDI_TYPE_SIO: 444 switch (t->c_ospeed) { 445 case 300: rate = ftdi_sio_b300; break; 446 case 600: rate = ftdi_sio_b600; break; 447 case 1200: rate = ftdi_sio_b1200; break; 448 case 2400: rate = ftdi_sio_b2400; break; 449 case 4800: rate = ftdi_sio_b4800; break; 450 case 9600: rate = ftdi_sio_b9600; break; 451 case 19200: rate = ftdi_sio_b19200; break; 452 case 38400: rate = ftdi_sio_b38400; break; 453 case 57600: rate = ftdi_sio_b57600; break; 454 case 115200: rate = ftdi_sio_b115200; break; 455 default: 456 return (EINVAL); 457 } 458 break; 459 460 case UFTDI_TYPE_8U232AM: 461 switch(t->c_ospeed) { 462 case 300: rate = ftdi_8u232am_b300; break; 463 case 600: rate = ftdi_8u232am_b600; break; 464 case 1200: rate = ftdi_8u232am_b1200; break; 465 case 2400: rate = ftdi_8u232am_b2400; break; 466 case 4800: rate = ftdi_8u232am_b4800; break; 467 case 9600: rate = ftdi_8u232am_b9600; break; 468 case 19200: rate = ftdi_8u232am_b19200; break; 469 case 38400: rate = ftdi_8u232am_b38400; break; 470 case 57600: rate = ftdi_8u232am_b57600; break; 471 case 115200: rate = ftdi_8u232am_b115200; break; 472 case 230400: rate = ftdi_8u232am_b230400; break; 473 case 460800: rate = ftdi_8u232am_b460800; break; 474 case 921600: rate = ftdi_8u232am_b921600; break; 475 default: 476 return (EINVAL); 477 } 478 break; 479 480 default: 481 return (EINVAL); 482 } 483 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 484 req.bRequest = FTDI_SIO_SET_BAUD_RATE; 485 USETW(req.wValue, rate); 486 USETW(req.wIndex, portno); 487 USETW(req.wLength, 0); 488 DPRINTFN(2,("uftdi_param: reqtype=0x%02x req=0x%02x value=0x%04x " 489 "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest, 490 UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength))); 491 err = usbd_do_request(sc->sc_udev, &req, NULL); 492 if (err) 493 return (EIO); 494 495 if (ISSET(t->c_cflag, CSTOPB)) 496 data = FTDI_SIO_SET_DATA_STOP_BITS_2; 497 else 498 data = FTDI_SIO_SET_DATA_STOP_BITS_1; 499 if (ISSET(t->c_cflag, PARENB)) { 500 if (ISSET(t->c_cflag, PARODD)) 501 data |= FTDI_SIO_SET_DATA_PARITY_ODD; 502 else 503 data |= FTDI_SIO_SET_DATA_PARITY_EVEN; 504 } else 505 data |= FTDI_SIO_SET_DATA_PARITY_NONE; 506 switch (ISSET(t->c_cflag, CSIZE)) { 507 case CS5: 508 data |= FTDI_SIO_SET_DATA_BITS(5); 509 break; 510 case CS6: 511 data |= FTDI_SIO_SET_DATA_BITS(6); 512 break; 513 case CS7: 514 data |= FTDI_SIO_SET_DATA_BITS(7); 515 break; 516 case CS8: 517 data |= FTDI_SIO_SET_DATA_BITS(8); 518 break; 519 } 520 sc->last_lcr = data; 521 522 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 523 req.bRequest = FTDI_SIO_SET_DATA; 524 USETW(req.wValue, data); 525 USETW(req.wIndex, portno); 526 USETW(req.wLength, 0); 527 DPRINTFN(2,("uftdi_param: reqtype=0x%02x req=0x%02x value=0x%04x " 528 "index=0x%04x len=%d\n", req.bmRequestType, req.bRequest, 529 UGETW(req.wValue), UGETW(req.wIndex), UGETW(req.wLength))); 530 err = usbd_do_request(sc->sc_udev, &req, NULL); 531 if (err) 532 return (EIO); 533 534 if (ISSET(t->c_cflag, CRTSCTS)) { 535 flow = FTDI_SIO_RTS_CTS_HS; 536 USETW(req.wValue, 0); 537 } else if (ISSET(t->c_iflag, IXON|IXOFF)) { 538 flow = FTDI_SIO_XON_XOFF_HS; 539 USETW2(req.wValue, t->c_cc[VSTOP], t->c_cc[VSTART]); 540 } else { 541 flow = FTDI_SIO_DISABLE_FLOW_CTRL; 542 USETW(req.wValue, 0); 543 } 544 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 545 req.bRequest = FTDI_SIO_SET_FLOW_CTRL; 546 USETW2(req.wIndex, flow, portno); 547 USETW(req.wLength, 0); 548 err = usbd_do_request(sc->sc_udev, &req, NULL); 549 if (err) 550 return (EIO); 551 552 return (0); 553 } 554 555 void 556 uftdi_get_status(void *vsc, int portno, u_char *lsr, u_char *msr) 557 { 558 struct uftdi_softc *sc = vsc; 559 560 DPRINTF(("uftdi_status: msr=0x%02x lsr=0x%02x\n", 561 sc->sc_msr, sc->sc_lsr)); 562 563 if (msr != NULL) 564 *msr = sc->sc_msr; 565 if (lsr != NULL) 566 *lsr = sc->sc_lsr; 567 } 568 569 void 570 uftdi_break(void *vsc, int portno, int onoff) 571 { 572 struct uftdi_softc *sc = vsc; 573 usb_device_request_t req; 574 int data; 575 576 DPRINTF(("uftdi_break: sc=%p, port=%d onoff=%d\n", vsc, portno, 577 onoff)); 578 579 if (onoff) { 580 data = sc->last_lcr | FTDI_SIO_SET_BREAK; 581 } else { 582 data = sc->last_lcr; 583 } 584 585 req.bmRequestType = UT_WRITE_VENDOR_DEVICE; 586 req.bRequest = FTDI_SIO_SET_DATA; 587 USETW(req.wValue, data); 588 USETW(req.wIndex, portno); 589 USETW(req.wLength, 0); 590 (void)usbd_do_request(sc->sc_udev, &req, NULL); 591 }
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