drivers/usb/serial/ssu100.c

   1 /*
   2  * usb-serial driver for Quatech SSU-100
   3  *
   4  * based on ftdi_sio.c and the original serqt_usb.c from Quatech
   5  *
   6  */
   7
   8 #include <linux/errno.h>
   9 #include <linux/init.h>
  10 #include <linux/slab.h>
  11 #include <linux/tty.h>
  12 #include <linux/tty_driver.h>
  13 #include <linux/tty_flip.h>
  14 #include <linux/module.h>
  15 #include <linux/serial.h>
  16 #include <linux/usb.h>
  17 #include <linux/usb/serial.h>
  18 #include <linux/serial_reg.h>
  19 #include <linux/uaccess.h>
  20
  21 #define QT_OPEN_CLOSE_CHANNEL       0xca
  22 #define QT_SET_GET_DEVICE           0xc2
  23 #define QT_SET_GET_REGISTER         0xc0
  24 #define QT_GET_SET_PREBUF_TRIG_LVL  0xcc
  25 #define QT_SET_ATF                  0xcd
  26 #define QT_GET_SET_UART             0xc1
  27 #define QT_TRANSFER_IN              0xc0
  28 #define QT_HW_FLOW_CONTROL_MASK     0xc5
  29 #define QT_SW_FLOW_CONTROL_MASK     0xc6
  30
  31 #define  SERIAL_MSR_MASK            0xf0
  32
  33 #define  SERIAL_CRTSCTS ((UART_MCR_RTS << 8) | UART_MSR_CTS)
  34
  35 #define  SERIAL_EVEN_PARITY         (UART_LCR_PARITY | UART_LCR_EPAR)
  36
  37 #define  MAX_BAUD_RATE              460800
  38
  39 #define ATC_DISABLED                0x00
  40 #define DUPMODE_BITS        0xc0
  41 #define RR_BITS             0x03
  42 #define LOOPMODE_BITS       0x41
  43 #define RS232_MODE          0x00
  44 #define RTSCTS_TO_CONNECTOR 0x40
  45 #define CLKS_X4             0x02
  46 #define FULLPWRBIT          0x00000080
  47 #define NEXT_BOARD_POWER_BIT        0x00000004
  48
  49 #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
  50
  51 #define USB_VENDOR_ID_QUATECH   0x061d  /* Quatech VID */
  52 #define QUATECH_SSU100  0xC020  /* SSU100 */
  53
  54 static const struct usb_device_id id_table[] = {
  55         {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
  56         {}                      /* Terminating entry */
  57 };
  58 MODULE_DEVICE_TABLE(usb, id_table);
  59
  60 struct ssu100_port_private {
  61         spinlock_t status_lock;
  62         u8 shadowLSR;
  63         u8 shadowMSR;
  64         wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
  65         struct async_icount icount;
  66 };
  67
  68 static inline int ssu100_control_msg(struct usb_device *dev,
  69                                      u8 request, u16 data, u16 index)
  70 {
  71         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  72                                request, 0x40, data, index,
  73                                NULL, 0, 300);
  74 }
  75
  76 static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
  77 {
  78         u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));
  79
  80         return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
  81 }
  82
  83
  84 static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
  85 {
  86         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  87                                QT_SET_GET_DEVICE, 0xc0, 0, 0,
  88                                data, 3, 300);
  89 }
  90
  91 static inline int ssu100_getregister(struct usb_device *dev,
  92                                      unsigned short uart,
  93                                      unsigned short reg,
  94                                      u8 *data)
  95 {
  96         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  97                                QT_SET_GET_REGISTER, 0xc0, reg,
  98                                uart, data, sizeof(*data), 300);
  99
 100 }
 101
 102
 103 static inline int ssu100_setregister(struct usb_device *dev,
 104                                      unsigned short uart,
 105                                      unsigned short reg,
 106                                      u16 data)
 107 {
 108         u16 value = (data << 8) | reg;
 109
 110         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 111                                QT_SET_GET_REGISTER, 0x40, value, uart,
 112                                NULL, 0, 300);
 113
 114 }
 115
 116 #define set_mctrl(dev, set)             update_mctrl((dev), (set), 0)
 117 #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
 118
 119 /* these do not deal with device that have more than 1 port */
 120 static inline int update_mctrl(struct usb_device *dev, unsigned int set,
 121                                unsigned int clear)
 122 {
 123         unsigned urb_value;
 124         int result;
 125
 126         if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
 127                 dev_dbg(&dev->dev, "%s - DTR|RTS not being set|cleared\n", __func__);
 128                 return 0;       /* no change */
 129         }
 130
 131         clear &= ~set;  /* 'set' takes precedence over 'clear' */
 132         urb_value = 0;
 133         if (set & TIOCM_DTR)
 134                 urb_value |= UART_MCR_DTR;
 135         if (set & TIOCM_RTS)
 136                 urb_value |= UART_MCR_RTS;
 137
 138         result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
 139         if (result < 0)
 140                 dev_dbg(&dev->dev, "%s Error from MODEM_CTRL urb\n", __func__);
 141
 142         return result;
 143 }
 144
 145 static int ssu100_initdevice(struct usb_device *dev)
 146 {
 147         u8 *data;
 148         int result = 0;
 149
 150         data = kzalloc(3, GFP_KERNEL);
 151         if (!data)
 152                 return -ENOMEM;
 153
 154         result = ssu100_getdevice(dev, data);
 155         if (result < 0) {
 156                 dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
 157                 goto out;
 158         }
 159
 160         data[1] &= ~FULLPWRBIT;
 161
 162         result = ssu100_setdevice(dev, data);
 163         if (result < 0) {
 164                 dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
 165                 goto out;
 166         }
 167
 168         result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
 169         if (result < 0) {
 170                 dev_dbg(&dev->dev, "%s - set prebuffer level failed %i\n", __func__, result);
 171                 goto out;
 172         }
 173
 174         result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
 175         if (result < 0) {
 176                 dev_dbg(&dev->dev, "%s - set ATFprebuffer level failed %i\n", __func__, result);
 177                 goto out;
 178         }
 179
 180         result = ssu100_getdevice(dev, data);
 181         if (result < 0) {
 182                 dev_dbg(&dev->dev, "%s - get_device failed %i\n", __func__, result);
 183                 goto out;
 184         }
 185
 186         data[0] &= ~(RR_BITS | DUPMODE_BITS);
 187         data[0] |= CLKS_X4;
 188         data[1] &= ~(LOOPMODE_BITS);
 189         data[1] |= RS232_MODE;
 190
 191         result = ssu100_setdevice(dev, data);
 192         if (result < 0) {
 193                 dev_dbg(&dev->dev, "%s - setdevice failed %i\n", __func__, result);
 194                 goto out;
 195         }
 196
 197 out:    kfree(data);
 198         return result;
 199
 200 }
 201
 202
 203 static void ssu100_set_termios(struct tty_struct *tty,
 204                                struct usb_serial_port *port,
 205                                struct ktermios *old_termios)
 206 {
 207         struct usb_device *dev = port->serial->dev;
 208         struct ktermios *termios = &tty->termios;
 209         u16 baud, divisor, remainder;
 210         unsigned int cflag = termios->c_cflag;
 211         u16 urb_value = 0; /* will hold the new flags */
 212         int result;
 213
 214         if (cflag & PARENB) {
 215                 if (cflag & PARODD)
 216                         urb_value |= UART_LCR_PARITY;
 217                 else
 218                         urb_value |= SERIAL_EVEN_PARITY;
 219         }
 220
 221         switch (cflag & CSIZE) {
 222         case CS5:
 223                 urb_value |= UART_LCR_WLEN5;
 224                 break;
 225         case CS6:
 226                 urb_value |= UART_LCR_WLEN6;
 227                 break;
 228         case CS7:
 229                 urb_value |= UART_LCR_WLEN7;
 230                 break;
 231         default:
 232         case CS8:
 233                 urb_value |= UART_LCR_WLEN8;
 234                 break;
 235         }
 236
 237         baud = tty_get_baud_rate(tty);
 238         if (!baud)
 239                 baud = 9600;
 240
 241         dev_dbg(&port->dev, "%s - got baud = %d\n", __func__, baud);
 242
 243
 244         divisor = MAX_BAUD_RATE / baud;
 245         remainder = MAX_BAUD_RATE % baud;
 246         if (((remainder * 2) >= baud) && (baud != 110))
 247                 divisor++;
 248
 249         urb_value = urb_value << 8;
 250
 251         result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
 252         if (result < 0)
 253                 dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
 254
 255         if (cflag & CRTSCTS)
 256                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 257                                             SERIAL_CRTSCTS, 0);
 258         else
 259                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 260                                             0, 0);
 261         if (result < 0)
 262                 dev_dbg(&port->dev, "%s - set HW flow control failed\n", __func__);
 263
 264         if (I_IXOFF(tty) || I_IXON(tty)) {
 265                 u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));
 266
 267                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 268                                             x, 0);
 269         } else
 270                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 271                                             0, 0);
 272
 273         if (result < 0)
 274                 dev_dbg(&port->dev, "%s - set SW flow control failed\n", __func__);
 275
 276 }
 277
 278
 279 static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 280 {
 281         struct usb_device *dev = port->serial->dev;
 282         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 283         u8 *data;
 284         int result;
 285         unsigned long flags;
 286
 287         data = kzalloc(2, GFP_KERNEL);
 288         if (!data)
 289                 return -ENOMEM;
 290
 291         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 292                                  QT_OPEN_CLOSE_CHANNEL,
 293                                  QT_TRANSFER_IN, 0x01,
 294                                  0, data, 2, 300);
 295         if (result < 0) {
 296                 dev_dbg(&port->dev, "%s - open failed %i\n", __func__, result);
 297                 kfree(data);
 298                 return result;
 299         }
 300
 301         spin_lock_irqsave(&priv->status_lock, flags);
 302         priv->shadowLSR = data[0];
 303         priv->shadowMSR = data[1];
 304         spin_unlock_irqrestore(&priv->status_lock, flags);
 305
 306         kfree(data);
 307
 308 /* set to 9600 */
 309         result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
 310         if (result < 0)
 311                 dev_dbg(&port->dev, "%s - set uart failed\n", __func__);
 312
 313         if (tty)
 314                 ssu100_set_termios(tty, port, &tty->termios);
 315
 316         return usb_serial_generic_open(tty, port);
 317 }
 318
 319 static void ssu100_close(struct usb_serial_port *port)
 320 {
 321         usb_serial_generic_close(port);
 322 }
 323
 324 static int get_serial_info(struct usb_serial_port *port,
 325                            struct serial_struct __user *retinfo)
 326 {
 327         struct serial_struct tmp;
 328
 329         if (!retinfo)
 330                 return -EFAULT;
 331
 332         memset(&tmp, 0, sizeof(tmp));
 333         tmp.line                = port->serial->minor;
 334         tmp.port                = 0;
 335         tmp.irq                 = 0;
 336         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 337         tmp.xmit_fifo_size      = port->bulk_out_size;
 338         tmp.baud_base           = 9600;
 339         tmp.close_delay         = 5*HZ;
 340         tmp.closing_wait        = 30*HZ;
 341
 342         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
 343                 return -EFAULT;
 344         return 0;
 345 }
 346
 347 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
 348 {
 349         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 350         struct async_icount prev, cur;
 351         unsigned long flags;
 352
 353         spin_lock_irqsave(&priv->status_lock, flags);
 354         prev = priv->icount;
 355         spin_unlock_irqrestore(&priv->status_lock, flags);
 356
 357         while (1) {
 358                 wait_event_interruptible(priv->delta_msr_wait,
 359                                          ((priv->icount.rng != prev.rng) ||
 360                                           (priv->icount.dsr != prev.dsr) ||
 361                                           (priv->icount.dcd != prev.dcd) ||
 362                                           (priv->icount.cts != prev.cts)));
 363
 364                 if (signal_pending(current))
 365                         return -ERESTARTSYS;
 366
 367                 spin_lock_irqsave(&priv->status_lock, flags);
 368                 cur = priv->icount;
 369                 spin_unlock_irqrestore(&priv->status_lock, flags);
 370
 371                 if ((prev.rng == cur.rng) &&
 372                     (prev.dsr == cur.dsr) &&
 373                     (prev.dcd == cur.dcd) &&
 374                     (prev.cts == cur.cts))
 375                         return -EIO;
 376
 377                 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
 378                     (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
 379                     (arg & TIOCM_CD  && (prev.dcd != cur.dcd)) ||
 380                     (arg & TIOCM_CTS && (prev.cts != cur.cts)))
 381                         return 0;
 382         }
 383         return 0;
 384 }
 385
 386 static int ssu100_get_icount(struct tty_struct *tty,
 387                         struct serial_icounter_struct *icount)
 388 {
 389         struct usb_serial_port *port = tty->driver_data;
 390         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 391         struct async_icount cnow = priv->icount;
 392
 393         icount->cts = cnow.cts;
 394         icount->dsr = cnow.dsr;
 395         icount->rng = cnow.rng;
 396         icount->dcd = cnow.dcd;
 397         icount->rx = cnow.rx;
 398         icount->tx = cnow.tx;
 399         icount->frame = cnow.frame;
 400         icount->overrun = cnow.overrun;
 401         icount->parity = cnow.parity;
 402         icount->brk = cnow.brk;
 403         icount->buf_overrun = cnow.buf_overrun;
 404
 405         return 0;
 406 }
 407
 408
 409
 410 static int ssu100_ioctl(struct tty_struct *tty,
 411                     unsigned int cmd, unsigned long arg)
 412 {
 413         struct usb_serial_port *port = tty->driver_data;
 414
 415         dev_dbg(&port->dev, "%s cmd 0x%04x\n", __func__, cmd);
 416
 417         switch (cmd) {
 418         case TIOCGSERIAL:
 419                 return get_serial_info(port,
 420                                        (struct serial_struct __user *) arg);
 421
 422         case TIOCMIWAIT:
 423                 return wait_modem_info(port, arg);
 424
 425         default:
 426                 break;
 427         }
 428
 429         dev_dbg(&port->dev, "%s arg not supported\n", __func__);
 430
 431         return -ENOIOCTLCMD;
 432 }
 433
 434 static int ssu100_attach(struct usb_serial *serial)
 435 {
 436         return ssu100_initdevice(serial->dev);
 437 }
 438
 439 static int ssu100_port_probe(struct usb_serial_port *port)
 440 {
 441         struct ssu100_port_private *priv;
 442
 443         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 444         if (!priv)
 445                 return -ENOMEM;
 446
 447         spin_lock_init(&priv->status_lock);
 448         init_waitqueue_head(&priv->delta_msr_wait);
 449
 450         usb_set_serial_port_data(port, priv);
 451
 452         return 0;
 453 }
 454
 455 static int ssu100_port_remove(struct usb_serial_port *port)
 456 {
 457         struct ssu100_port_private *priv;
 458
 459         priv = usb_get_serial_port_data(port);
 460         kfree(priv);
 461
 462         return 0;
 463 }
 464
 465 static int ssu100_tiocmget(struct tty_struct *tty)
 466 {
 467         struct usb_serial_port *port = tty->driver_data;
 468         struct usb_device *dev = port->serial->dev;
 469         u8 *d;
 470         int r;
 471
 472         d = kzalloc(2, GFP_KERNEL);
 473         if (!d)
 474                 return -ENOMEM;
 475
 476         r = ssu100_getregister(dev, 0, UART_MCR, d);
 477         if (r < 0)
 478                 goto mget_out;
 479
 480         r = ssu100_getregister(dev, 0, UART_MSR, d+1);
 481         if (r < 0)
 482                 goto mget_out;
 483
 484         r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
 485                 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
 486                 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
 487                 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
 488                 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
 489                 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
 490
 491 mget_out:
 492         kfree(d);
 493         return r;
 494 }
 495
 496 static int ssu100_tiocmset(struct tty_struct *tty,
 497                            unsigned int set, unsigned int clear)
 498 {
 499         struct usb_serial_port *port = tty->driver_data;
 500         struct usb_device *dev = port->serial->dev;
 501
 502         return update_mctrl(dev, set, clear);
 503 }
 504
 505 static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 506 {
 507         struct usb_device *dev = port->serial->dev;
 508
 509         /* Disable flow control */
 510         if (!on) {
 511                 if (ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
 512                         dev_err(&port->dev, "error from flowcontrol urb\n");
 513         }
 514         /* drop RTS and DTR */
 515         if (on)
 516                 set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 517         else
 518                 clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 519 }
 520
 521 static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
 522 {
 523         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 524         unsigned long flags;
 525
 526         spin_lock_irqsave(&priv->status_lock, flags);
 527         priv->shadowMSR = msr;
 528         spin_unlock_irqrestore(&priv->status_lock, flags);
 529
 530         if (msr & UART_MSR_ANY_DELTA) {
 531                 /* update input line counters */
 532                 if (msr & UART_MSR_DCTS)
 533                         priv->icount.cts++;
 534                 if (msr & UART_MSR_DDSR)
 535                         priv->icount.dsr++;
 536                 if (msr & UART_MSR_DDCD)
 537                         priv->icount.dcd++;
 538                 if (msr & UART_MSR_TERI)
 539                         priv->icount.rng++;
 540                 wake_up_interruptible(&priv->delta_msr_wait);
 541         }
 542 }
 543
 544 static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
 545                               char *tty_flag)
 546 {
 547         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 548         unsigned long flags;
 549
 550         spin_lock_irqsave(&priv->status_lock, flags);
 551         priv->shadowLSR = lsr;
 552         spin_unlock_irqrestore(&priv->status_lock, flags);
 553
 554         *tty_flag = TTY_NORMAL;
 555         if (lsr & UART_LSR_BRK_ERROR_BITS) {
 556                 /* we always want to update icount, but we only want to
 557                  * update tty_flag for one case */
 558                 if (lsr & UART_LSR_BI) {
 559                         priv->icount.brk++;
 560                         *tty_flag = TTY_BREAK;
 561                         usb_serial_handle_break(port);
 562                 }
 563                 if (lsr & UART_LSR_PE) {
 564                         priv->icount.parity++;
 565                         if (*tty_flag == TTY_NORMAL)
 566                                 *tty_flag = TTY_PARITY;
 567                 }
 568                 if (lsr & UART_LSR_FE) {
 569                         priv->icount.frame++;
 570                         if (*tty_flag == TTY_NORMAL)
 571                                 *tty_flag = TTY_FRAME;
 572                 }
 573                 if (lsr & UART_LSR_OE){
 574                         priv->icount.overrun++;
 575                         if (*tty_flag == TTY_NORMAL)
 576                                 *tty_flag = TTY_OVERRUN;
 577                 }
 578         }
 579
 580 }
 581
 582 static void ssu100_process_read_urb(struct urb *urb)
 583 {
 584         struct usb_serial_port *port = urb->context;
 585         char *packet = (char *)urb->transfer_buffer;
 586         char flag = TTY_NORMAL;
 587         u32 len = urb->actual_length;
 588         int i;
 589         char *ch;
 590
 591         if ((len >= 4) &&
 592             (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 593             ((packet[2] == 0x00) || (packet[2] == 0x01))) {
 594                 if (packet[2] == 0x00) {
 595                         ssu100_update_lsr(port, packet[3], &flag);
 596                         if (flag == TTY_OVERRUN)
 597                                 tty_insert_flip_char(&port->port, 0,
 598                                                 TTY_OVERRUN);
 599                 }
 600                 if (packet[2] == 0x01)
 601                         ssu100_update_msr(port, packet[3]);
 602
 603                 len -= 4;
 604                 ch = packet + 4;
 605         } else
 606                 ch = packet;
 607
 608         if (!len)
 609                 return; /* status only */
 610
 611         if (port->port.console && port->sysrq) {
 612                 for (i = 0; i < len; i++, ch++) {
 613                         if (!usb_serial_handle_sysrq_char(port, *ch))
 614                                 tty_insert_flip_char(&port->port, *ch, flag);
 615                 }
 616         } else
 617                 tty_insert_flip_string_fixed_flag(&port->port, ch, flag, len);
 618
 619         tty_flip_buffer_push(&port->port);
 620 }
 621
 622 static struct usb_serial_driver ssu100_device = {
 623         .driver = {
 624                 .owner = THIS_MODULE,
 625                 .name = "ssu100",
 626         },
 627         .description         = DRIVER_DESC,
 628         .id_table            = id_table,
 629         .num_ports           = 1,
 630         .open                = ssu100_open,
 631         .close               = ssu100_close,
 632         .attach              = ssu100_attach,
 633         .port_probe          = ssu100_port_probe,
 634         .port_remove         = ssu100_port_remove,
 635         .dtr_rts             = ssu100_dtr_rts,
 636         .process_read_urb    = ssu100_process_read_urb,
 637         .tiocmget            = ssu100_tiocmget,
 638         .tiocmset            = ssu100_tiocmset,
 639         .get_icount          = ssu100_get_icount,
 640         .ioctl               = ssu100_ioctl,
 641         .set_termios         = ssu100_set_termios,
 642         .disconnect          = usb_serial_generic_disconnect,
 643 };
 644
 645 static struct usb_serial_driver * const serial_drivers[] = {
 646         &ssu100_device, NULL
 647 };
 648
 649 module_usb_serial_driver(serial_drivers, id_table);
 650
 651 MODULE_DESCRIPTION(DRIVER_DESC);
 652 MODULE_LICENSE("GPL");