sys/dev/usbmisc/umct/umct.c

   1 /*-
   2  * Copyright (c) 2003 Scott Long
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD: src/sys/dev/usb/umct.c,v 1.12 2006/09/07 00:06:42 imp Exp $
  27  * $DragonFly: src/sys/dev/usbmisc/umct/umct.c,v 1.10 2007/07/01 21:24:03 hasso Exp $
  28  */
  29
  30 /*
  31  * Driver for the MCT (Magic Control Technology) USB-RS232 Converter.
  32  * Based on the superb documentation from the linux mct_u232 driver by
  33  * Wolfgang Grandeggar <wolfgang@cec.ch>.
  34  * This device smells a lot like the Belkin F5U103, except that it has
  35  * suffered some mild brain-damage.  This driver is based off of the ubsa.c
  36  * driver from Alexander Kabaev <kan@freebsd.org>.  Merging the two together
  37  * might be useful, though the subtle differences might lead to lots of
  38  * #ifdef's.
  39  */
  40
  41 #include <sys/param.h>
  42 #include <sys/systm.h>
  43 #include <sys/kernel.h>
  44 #include <sys/malloc.h>
  45 #include <sys/bus.h>
  46 #include <sys/tty.h>
  47 #include <sys/taskqueue.h>
  48
  49 #include <bus/usb/usb.h>
  50 #include <bus/usb/usbdi.h>
  51 #include <bus/usb/usbdi_util.h>
  52 #include <bus/usb/usbdevs.h>
  53 #include "../ucom/ucomvar.h"
  54
  55 /* The UMCT advertises the standard 8250 UART registers */
  56 #define UMCT_GET_MSR            2       /* Get Modem Status Register */
  57 #define UMCT_GET_MSR_SIZE       1
  58 #define UMCT_GET_LCR            6       /* Get Line Control Register */
  59 #define UMCT_GET_LCR_SIZE       1
  60 #define UMCT_SET_BAUD           5       /* Set the Baud Rate Divisor */
  61 #define UMCT_SET_BAUD_SIZE      4
  62 #define UMCT_SET_LCR            7       /* Set Line Control Register */
  63 #define UMCT_SET_LCR_SIZE       1
  64 #define UMCT_SET_MCR            10      /* Set Modem Control Register */
  65 #define UMCT_SET_MCR_SIZE       1
  66 #define UMCT_SET_UNKNOWN1       11
  67 #define UMCT_SET_UNKNOWN1_SIZE  1
  68 #define UMCT_SET_UNKNOWN2       12
  69 #define UMCT_SET_UNKNOWN2_SIZE  1
  70
  71
  72 #define UMCT_INTR_INTERVAL      100
  73 #define UMCT_IFACE_INDEX        0
  74 #define UMCT_CONFIG_INDEX       1
  75
  76 struct umct_softc {
  77         struct ucom_softc       sc_ucom;
  78         int                     sc_iface_number;
  79         usbd_interface_handle   sc_intr_iface;
  80         int                     sc_intr_number;
  81         usbd_pipe_handle        sc_intr_pipe;
  82         u_char                  *sc_intr_buf;
  83         int                     sc_isize;
  84         uint8_t                 sc_lsr;
  85         uint8_t                 sc_msr;
  86         uint8_t                 sc_lcr;
  87         uint8_t                 sc_mcr;
  88         struct task             sc_task;
  89 };
  90
  91 static void umct_intr(usbd_xfer_handle, usbd_private_handle, usbd_status);
  92 static void umct_get_status(void *, int, u_char *, u_char *);
  93 static void umct_set(void *, int, int, int);
  94 static int  umct_param(void *, int, struct termios *);
  95 static int  umct_open(void *, int);
  96 static void umct_close(void *, int);
  97 static void umct_notify(void *, int);
  98
  99 static struct ucom_callback umct_callback = {
 100         umct_get_status,        /* ucom_get_status */
 101         umct_set,               /* ucom_set */
 102         umct_param,             /* ucom_param */
 103         NULL,                   /* ucom_ioctl */
 104         umct_open,              /* ucom_open */
 105         umct_close,             /* ucom_close */
 106         NULL,                   /* ucom_read */
 107         NULL                    /* ucom_write */
 108 };
 109
 110 static const struct umct_product {
 111         uint16_t        vendor;
 112         uint16_t        product;
 113 } umct_products[] = {
 114         { USB_VENDOR_MCT, USB_PRODUCT_MCT_USB232 },
 115         { USB_VENDOR_MCT, USB_PRODUCT_MCT_SITECOM_USB232 },
 116         { USB_VENDOR_MCT, USB_PRODUCT_MCT_DU_H3SP_USB232 },
 117         { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U109 },
 118         { USB_VENDOR_BELKIN, USB_PRODUCT_BELKIN_F5U409 },
 119         { 0, 0 }
 120 };
 121
 122 static device_probe_t   umct_match;
 123 static device_attach_t  umct_attach;
 124 static device_detach_t  umct_detach;
 125
 126 static device_method_t umct_methods[] = {
 127         DEVMETHOD(device_probe, umct_match),
 128         DEVMETHOD(device_attach, umct_attach),
 129         DEVMETHOD(device_detach, umct_detach),
 130         { 0, 0 }
 131 };
 132
 133 static driver_t umct_driver = {
 134         "ucom",
 135         umct_methods,
 136         sizeof(struct umct_softc)
 137 };
 138
 139 DRIVER_MODULE(umct, uhub, umct_driver, ucom_devclass, usbd_driver_load, 0);
 140 MODULE_DEPEND(umct, usb, 1, 1, 1);
 141 MODULE_DEPEND(umct, ucom, UCOM_MINVER, UCOM_PREFVER, UCOM_MAXVER);
 142 MODULE_VERSION(umct, 1);
 143
 144 static int
 145 umct_match(device_t self)
 146 {
 147         struct usb_attach_arg *uaa = device_get_ivars(self);
 148         int i;
 149
 150         if (uaa->iface != NULL)
 151                 return (UMATCH_NONE);
 152
 153         for (i = 0; umct_products[i].vendor != 0; i++) {
 154                 if (umct_products[i].vendor == uaa->vendor &&
 155                     umct_products[i].product == uaa->product) {
 156                         return (UMATCH_VENDOR_PRODUCT);
 157                 }
 158         }
 159
 160         return (UMATCH_NONE);
 161 }
 162
 163 static int
 164 umct_attach(device_t self)
 165 {
 166         struct umct_softc *sc = device_get_softc(self);
 167         struct usb_attach_arg *uaa = device_get_ivars(self);
 168         usbd_device_handle dev;
 169         struct ucom_softc *ucom;
 170         usb_config_descriptor_t *cdesc;
 171         usb_interface_descriptor_t *id;
 172         usb_endpoint_descriptor_t *ed;
 173         char *devinfo;
 174         const char *devname;
 175         usbd_status err;
 176         int i;
 177
 178         dev = uaa->device;
 179         devinfo = kmalloc(1024, M_USBDEV, M_INTWAIT | M_ZERO);
 180         bzero(sc, sizeof(struct umct_softc));
 181         ucom = &sc->sc_ucom;
 182         ucom->sc_dev = self;
 183         ucom->sc_udev = dev;
 184         ucom->sc_iface = uaa->iface;
 185
 186         usbd_devinfo(dev, 0, devinfo);
 187         device_set_desc_copy(self, devinfo);
 188         devname = device_get_nameunit(ucom->sc_dev);
 189         kprintf("%s: %s\n", devname, devinfo);
 190
 191         ucom->sc_bulkout_no = -1;
 192         ucom->sc_bulkin_no = -1;
 193         sc->sc_intr_number = -1;
 194         sc->sc_intr_pipe = NULL;
 195
 196         err = usbd_set_config_index(dev, UMCT_CONFIG_INDEX, 1);
 197         if (err) {
 198                 kprintf("%s: failed to set configuration: %s\n",
 199                     devname, usbd_errstr(err));
 200                 ucom->sc_dying = 1;
 201                 goto error;
 202         }
 203
 204         cdesc = usbd_get_config_descriptor(ucom->sc_udev);
 205         if (cdesc == NULL) {
 206                 kprintf("%s: failed to get configuration descriptor\n", devname);
 207                 ucom->sc_dying = 1;
 208                 goto error;
 209         }
 210
 211         err = usbd_device2interface_handle(dev, UMCT_IFACE_INDEX,
 212             &ucom->sc_iface);
 213         if (err) {
 214                 kprintf("%s: failed to get interface: %s\n", devname,
 215                     usbd_errstr(err));
 216                 ucom->sc_dying = 1;
 217                 goto error;
 218         }
 219
 220         id = usbd_get_interface_descriptor(ucom->sc_iface);
 221         sc->sc_iface_number = id->bInterfaceNumber;
 222
 223         for (i = 0; i < id->bNumEndpoints; i++) {
 224                 ed = usbd_interface2endpoint_descriptor(ucom->sc_iface, i);
 225                 if (ed == NULL) {
 226                         kprintf("%s: no endpoint descriptor for %d\n",
 227                             devname, i);
 228                         ucom->sc_dying = 1;
 229                         goto error;
 230                 }
 231
 232                 /*
 233                  * The real bulk-in endpoint is also marked as an interrupt.
 234                  * The only way to differentiate it from the real interrupt
 235                  * endpoint is to look at the wMaxPacketSize field.
 236                  */
 237                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_IN) {
 238                         if (UGETW(ed->wMaxPacketSize) == 0x2) {
 239                                 sc->sc_intr_number = ed->bEndpointAddress;
 240                                 sc->sc_isize = UGETW(ed->wMaxPacketSize);
 241                         } else {
 242                                 ucom->sc_bulkin_no = ed->bEndpointAddress;
 243                                 ucom->sc_ibufsize = UGETW(ed->wMaxPacketSize);
 244                         }
 245                         continue;
 246                 }
 247
 248                 if (UE_GET_DIR(ed->bEndpointAddress) == UE_DIR_OUT) {
 249                         ucom->sc_bulkout_no = ed->bEndpointAddress;
 250                         if (uaa->product == USB_PRODUCT_MCT_SITECOM_USB232)
 251                                 ucom->sc_obufsize = 16; /* device is broken */
 252                         else
 253                                 ucom->sc_obufsize = UGETW(ed->wMaxPacketSize);
 254                         continue;
 255                 }
 256
 257                 kprintf("%s: warning - unsupported endpoint 0x%x\n", devname,
 258                     ed->bEndpointAddress);
 259         }
 260
 261         if (sc->sc_intr_number == -1) {
 262                 kprintf("%s: Could not find interrupt in\n", devname);
 263                 ucom->sc_dying = 1;
 264                 goto error;
 265         }
 266
 267         sc->sc_intr_iface = ucom->sc_iface;
 268
 269         if (ucom->sc_bulkout_no == -1) {
 270                 kprintf("%s: Could not find data bulk out\n", devname);
 271                 ucom->sc_dying = 1;
 272                 goto error;
 273         }
 274
 275         ucom->sc_parent = sc;
 276         ucom->sc_portno = UCOM_UNK_PORTNO;
 277         ucom->sc_opkthdrlen = 0;
 278         ucom->sc_callback = &umct_callback;
 279         TASK_INIT(&sc->sc_task, 0, umct_notify, sc);
 280         ucom_attach(ucom);
 281
 282         kfree(devinfo, M_USBDEV);
 283         return 0;
 284
 285 error:
 286         kfree(devinfo, M_USBDEV);
 287         return ENXIO;
 288 }
 289
 290 static int
 291 umct_detach(device_t self)
 292 {
 293         struct umct_softc *sc = device_get_softc(self);
 294         int rv;
 295
 296         if (sc->sc_intr_pipe != NULL) {
 297                 usbd_abort_pipe(sc->sc_intr_pipe);
 298                 usbd_close_pipe(sc->sc_intr_pipe);
 299                 kfree(sc->sc_intr_buf, M_USBDEV);
 300                 sc->sc_intr_pipe = NULL;
 301         }
 302
 303         sc->sc_ucom.sc_dying = 1;
 304         rv = ucom_detach(&sc->sc_ucom);
 305         return (rv);
 306 }
 307
 308 static int
 309 umct_request(struct umct_softc *sc, uint8_t request, int len, uint32_t value)
 310 {
 311         usb_device_request_t req;
 312         usbd_status err;
 313         uint8_t oval[4];
 314
 315         req.bmRequestType = UT_WRITE_VENDOR_DEVICE;
 316         req.bRequest = request;
 317         USETW(req.wValue, 0);
 318         USETW(req.wIndex, sc->sc_iface_number);
 319         USETW(req.wLength, len);
 320         USETDW(oval, value);
 321
 322         err = usbd_do_request(sc->sc_ucom.sc_udev, &req, oval);
 323         if (err)
 324                 kprintf("%s: ubsa_request: %s\n",
 325                     device_get_nameunit(sc->sc_ucom.sc_dev), usbd_errstr(err));
 326         return (err);
 327 }
 328
 329 static void
 330 umct_intr(usbd_xfer_handle xfer, usbd_private_handle priv, usbd_status status)
 331 {
 332         struct umct_softc *sc;
 333         u_char *buf;
 334
 335         sc = (struct umct_softc *)priv;
 336         buf = sc->sc_intr_buf;
 337         if (sc->sc_ucom.sc_dying)
 338                 return;
 339
 340         if (status != USBD_NORMAL_COMPLETION) {
 341                 if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
 342                         return;
 343
 344                 usbd_clear_endpoint_stall_async(sc->sc_intr_pipe);
 345                 return;
 346         }
 347
 348         sc->sc_msr = buf[0];
 349         sc->sc_lsr = buf[1];
 350
 351         /*
 352          * Defer notifying the ucom layer as it doesn't like to be bothered
 353          * from an interrupt context.
 354          */
 355         taskqueue_enqueue(taskqueue_swi, &sc->sc_task);
 356 }
 357
 358 static void
 359 umct_notify(void *arg, int count)
 360 {
 361         struct umct_softc *sc;
 362
 363         sc = (struct umct_softc *)arg;
 364         if (sc->sc_ucom.sc_dying == 0)
 365                 ucom_status_change(&sc->sc_ucom);
 366 }
 367
 368 static void
 369 umct_get_status(void *addr, int portno, u_char *lsr, u_char *msr)
 370 {
 371         struct umct_softc *sc;
 372
 373         sc = addr;
 374         if (lsr != NULL)
 375                 *lsr = sc->sc_lsr;
 376         if (msr != NULL)
 377                 *msr = sc->sc_msr;
 378
 379         return;
 380 }
 381
 382 static void
 383 umct_set(void *addr, int portno, int reg, int onoff)
 384 {
 385         struct umct_softc *sc;
 386
 387         sc = addr;
 388         switch (reg) {
 389         case UCOM_SET_BREAK:
 390                 sc->sc_lcr &= ~0x40;
 391                 sc->sc_lcr |= (onoff) ? 0x40 : 0;
 392                 umct_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, sc->sc_lcr);
 393                 break;
 394         case UCOM_SET_DTR:
 395                 sc->sc_mcr &= ~0x01;
 396                 sc->sc_mcr |= (onoff) ? 0x01 : 0;
 397                 umct_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
 398                 break;
 399         case UCOM_SET_RTS:
 400                 sc->sc_mcr &= ~0x2;
 401                 sc->sc_mcr |= (onoff) ? 0x02 : 0;
 402                 umct_request(sc, UMCT_SET_MCR, UMCT_SET_MCR_SIZE, sc->sc_mcr);
 403                 break;
 404         default:
 405                 break;
 406         }
 407 }
 408
 409 static int
 410 umct_calc_baud(u_int baud)
 411 {
 412         switch(baud) {
 413         case B300: return (0x1);
 414         case B600: return (0x2);
 415         case B1200: return (0x3);
 416         case B2400: return (0x4);
 417         case B4800: return (0x6);
 418         case B9600: return (0x8);
 419         case B19200: return (0x9);
 420         case B38400: return (0xa);
 421         case B57600: return (0xb);
 422         case 115200: return (0xc);
 423         case B0:
 424         default:
 425                 break;
 426         }
 427
 428         return (0x0);
 429 }
 430
 431 static int
 432 umct_param(void *addr, int portno, struct termios *ti)
 433 {
 434         struct umct_softc *sc;
 435         uint32_t value;
 436
 437         sc = addr;
 438         value = umct_calc_baud(ti->c_ospeed);
 439         umct_request(sc, UMCT_SET_BAUD, UMCT_SET_BAUD_SIZE, value);
 440         umct_request(sc, UMCT_SET_UNKNOWN1, UMCT_SET_UNKNOWN1_SIZE, 0);
 441         umct_request(sc, UMCT_SET_UNKNOWN2, UMCT_SET_UNKNOWN2_SIZE, 0);
 442
 443         value = sc->sc_lcr & 0x40;
 444
 445         switch (ti->c_cflag & CSIZE) {
 446         case CS5: value |= 0x0; break;
 447         case CS6: value |= 0x1; break;
 448         case CS7: value |= 0x2; break;
 449         case CS8: value |= 0x3; break;
 450         default: value |= 0x0; break;
 451         }
 452
 453         value |= (ti->c_cflag & CSTOPB) ? 0x4 : 0;
 454         if (ti->c_cflag & PARENB) {
 455                 value |= 0x8;
 456                 value |= (ti->c_cflag & PARODD) ? 0x0 : 0x10;
 457         }
 458
 459         /*
 460          * XXX There doesn't seem to be a way to tell the device to use flow
 461          * control.
 462          */
 463
 464         sc->sc_lcr = value;
 465         umct_request(sc, UMCT_SET_LCR, UMCT_SET_LCR_SIZE, value);
 466
 467         return (0);
 468 }
 469
 470 static int
 471 umct_open(void *addr, int portno)
 472 {
 473         struct umct_softc *sc;
 474         int err;
 475
 476         sc = addr;
 477         if (sc->sc_ucom.sc_dying) {
 478                 return (ENXIO);
 479         }
 480
 481         if (sc->sc_intr_number != -1 && sc->sc_intr_pipe == NULL) {
 482                 sc->sc_intr_buf = kmalloc(sc->sc_isize, M_USBDEV, M_WAITOK);
 483                 err = usbd_open_pipe_intr(sc->sc_intr_iface, sc->sc_intr_number,
 484                     USBD_SHORT_XFER_OK, &sc->sc_intr_pipe, sc, sc->sc_intr_buf,
 485                     sc->sc_isize, umct_intr, UMCT_INTR_INTERVAL);
 486                 if (err) {
 487                         kprintf("%s: cannot open interrupt pipe (addr %d)\n",
 488                             device_get_nameunit(sc->sc_ucom.sc_dev),
 489                             sc->sc_intr_number);
 490                         kfree(sc->sc_intr_buf, M_USBDEV);
 491                         return (EIO);
 492                 }
 493         }
 494
 495         return (0);
 496 }
 497
 498 static void
 499 umct_close(void *addr, int portno)
 500 {
 501         struct umct_softc *sc;
 502         int err;
 503
 504         sc = addr;
 505         if (sc->sc_ucom.sc_dying)
 506                 return;
 507
 508         if (sc->sc_intr_pipe != NULL) {
 509                 err = usbd_abort_pipe(sc->sc_intr_pipe);
 510                 if (err)
 511                         kprintf("%s: abort interrupt pipe failed: %s\n",
 512                             device_get_nameunit(sc->sc_ucom.sc_dev), usbd_errstr(err));
 513                 err = usbd_close_pipe(sc->sc_intr_pipe);
 514                 if (err)
 515                         kprintf("%s: close interrupt pipe failed: %s\n",
 516                             device_get_nameunit(sc->sc_ucom.sc_dev), usbd_errstr(err));
 517                 kfree(sc->sc_intr_buf, M_USBDEV);
 518                 sc->sc_intr_pipe = NULL;
 519         }
 520 }