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