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 static bool debug;
  50
  51 /* Version Information */
  52 #define DRIVER_VERSION "v0.1"
  53 #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
  54
  55 #define USB_VENDOR_ID_QUATECH   0x061d  /* Quatech VID */
  56 #define QUATECH_SSU100  0xC020  /* SSU100 */
  57
  58 static const struct usb_device_id id_table[] = {
  59         {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
  60         {}                      /* Terminating entry */
  61 };
  62 MODULE_DEVICE_TABLE(usb, id_table);
  63
  64 struct ssu100_port_private {
  65         spinlock_t status_lock;
  66         u8 shadowLSR;
  67         u8 shadowMSR;
  68         wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
  69         struct async_icount icount;
  70 };
  71
  72 static inline int ssu100_control_msg(struct usb_device *dev,
  73                                      u8 request, u16 data, u16 index)
  74 {
  75         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  76                                request, 0x40, data, index,
  77                                NULL, 0, 300);
  78 }
  79
  80 static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
  81 {
  82         u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));
  83
  84         return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
  85 }
  86
  87
  88 static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
  89 {
  90         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  91                                QT_SET_GET_DEVICE, 0xc0, 0, 0,
  92                                data, 3, 300);
  93 }
  94
  95 static inline int ssu100_getregister(struct usb_device *dev,
  96                                      unsigned short uart,
  97                                      unsigned short reg,
  98                                      u8 *data)
  99 {
 100         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 101                                QT_SET_GET_REGISTER, 0xc0, reg,
 102                                uart, data, sizeof(*data), 300);
 103
 104 }
 105
 106
 107 static inline int ssu100_setregister(struct usb_device *dev,
 108                                      unsigned short uart,
 109                                      unsigned short reg,
 110                                      u16 data)
 111 {
 112         u16 value = (data << 8) | reg;
 113
 114         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 115                                QT_SET_GET_REGISTER, 0x40, value, uart,
 116                                NULL, 0, 300);
 117
 118 }
 119
 120 #define set_mctrl(dev, set)             update_mctrl((dev), (set), 0)
 121 #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
 122
 123 /* these do not deal with device that have more than 1 port */
 124 static inline int update_mctrl(struct usb_device *dev, unsigned int set,
 125                                unsigned int clear)
 126 {
 127         unsigned urb_value;
 128         int result;
 129
 130         if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
 131                 dbg("%s - DTR|RTS not being set|cleared", __func__);
 132                 return 0;       /* no change */
 133         }
 134
 135         clear &= ~set;  /* 'set' takes precedence over 'clear' */
 136         urb_value = 0;
 137         if (set & TIOCM_DTR)
 138                 urb_value |= UART_MCR_DTR;
 139         if (set & TIOCM_RTS)
 140                 urb_value |= UART_MCR_RTS;
 141
 142         result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
 143         if (result < 0)
 144                 dbg("%s Error from MODEM_CTRL urb", __func__);
 145
 146         return result;
 147 }
 148
 149 static int ssu100_initdevice(struct usb_device *dev)
 150 {
 151         u8 *data;
 152         int result = 0;
 153
 154         data = kzalloc(3, GFP_KERNEL);
 155         if (!data)
 156                 return -ENOMEM;
 157
 158         result = ssu100_getdevice(dev, data);
 159         if (result < 0) {
 160                 dbg("%s - get_device failed %i", __func__, result);
 161                 goto out;
 162         }
 163
 164         data[1] &= ~FULLPWRBIT;
 165
 166         result = ssu100_setdevice(dev, data);
 167         if (result < 0) {
 168                 dbg("%s - setdevice failed %i", __func__, result);
 169                 goto out;
 170         }
 171
 172         result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
 173         if (result < 0) {
 174                 dbg("%s - set prebuffer level failed %i", __func__, result);
 175                 goto out;
 176         }
 177
 178         result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
 179         if (result < 0) {
 180                 dbg("%s - set ATFprebuffer level failed %i", __func__, result);
 181                 goto out;
 182         }
 183
 184         result = ssu100_getdevice(dev, data);
 185         if (result < 0) {
 186                 dbg("%s - get_device failed %i", __func__, result);
 187                 goto out;
 188         }
 189
 190         data[0] &= ~(RR_BITS | DUPMODE_BITS);
 191         data[0] |= CLKS_X4;
 192         data[1] &= ~(LOOPMODE_BITS);
 193         data[1] |= RS232_MODE;
 194
 195         result = ssu100_setdevice(dev, data);
 196         if (result < 0) {
 197                 dbg("%s - setdevice failed %i", __func__, result);
 198                 goto out;
 199         }
 200
 201 out:    kfree(data);
 202         return result;
 203
 204 }
 205
 206
 207 static void ssu100_set_termios(struct tty_struct *tty,
 208                                struct usb_serial_port *port,
 209                                struct ktermios *old_termios)
 210 {
 211         struct usb_device *dev = port->serial->dev;
 212         struct ktermios *termios = tty->termios;
 213         u16 baud, divisor, remainder;
 214         unsigned int cflag = termios->c_cflag;
 215         u16 urb_value = 0; /* will hold the new flags */
 216         int result;
 217
 218         if (cflag & PARENB) {
 219                 if (cflag & PARODD)
 220                         urb_value |= UART_LCR_PARITY;
 221                 else
 222                         urb_value |= SERIAL_EVEN_PARITY;
 223         }
 224
 225         switch (cflag & CSIZE) {
 226         case CS5:
 227                 urb_value |= UART_LCR_WLEN5;
 228                 break;
 229         case CS6:
 230                 urb_value |= UART_LCR_WLEN6;
 231                 break;
 232         case CS7:
 233                 urb_value |= UART_LCR_WLEN7;
 234                 break;
 235         default:
 236         case CS8:
 237                 urb_value |= UART_LCR_WLEN8;
 238                 break;
 239         }
 240
 241         baud = tty_get_baud_rate(tty);
 242         if (!baud)
 243                 baud = 9600;
 244
 245         dbg("%s - got baud = %d\n", __func__, baud);
 246
 247
 248         divisor = MAX_BAUD_RATE / baud;
 249         remainder = MAX_BAUD_RATE % baud;
 250         if (((remainder * 2) >= baud) && (baud != 110))
 251                 divisor++;
 252
 253         urb_value = urb_value << 8;
 254
 255         result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
 256         if (result < 0)
 257                 dbg("%s - set uart failed", __func__);
 258
 259         if (cflag & CRTSCTS)
 260                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 261                                             SERIAL_CRTSCTS, 0);
 262         else
 263                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 264                                             0, 0);
 265         if (result < 0)
 266                 dbg("%s - set HW flow control failed", __func__);
 267
 268         if (I_IXOFF(tty) || I_IXON(tty)) {
 269                 u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));
 270
 271                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 272                                             x, 0);
 273         } else
 274                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 275                                             0, 0);
 276
 277         if (result < 0)
 278                 dbg("%s - set SW flow control failed", __func__);
 279
 280 }
 281
 282
 283 static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 284 {
 285         struct usb_device *dev = port->serial->dev;
 286         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 287         u8 *data;
 288         int result;
 289         unsigned long flags;
 290
 291         data = kzalloc(2, GFP_KERNEL);
 292         if (!data)
 293                 return -ENOMEM;
 294
 295         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 296                                  QT_OPEN_CLOSE_CHANNEL,
 297                                  QT_TRANSFER_IN, 0x01,
 298                                  0, data, 2, 300);
 299         if (result < 0) {
 300                 dbg("%s - open failed %i", __func__, result);
 301                 kfree(data);
 302                 return result;
 303         }
 304
 305         spin_lock_irqsave(&priv->status_lock, flags);
 306         priv->shadowLSR = data[0];
 307         priv->shadowMSR = data[1];
 308         spin_unlock_irqrestore(&priv->status_lock, flags);
 309
 310         kfree(data);
 311
 312 /* set to 9600 */
 313         result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
 314         if (result < 0)
 315                 dbg("%s - set uart failed", __func__);
 316
 317         if (tty)
 318                 ssu100_set_termios(tty, port, tty->termios);
 319
 320         return usb_serial_generic_open(tty, port);
 321 }
 322
 323 static void ssu100_close(struct usb_serial_port *port)
 324 {
 325         usb_serial_generic_close(port);
 326 }
 327
 328 static int get_serial_info(struct usb_serial_port *port,
 329                            struct serial_struct __user *retinfo)
 330 {
 331         struct serial_struct tmp;
 332
 333         if (!retinfo)
 334                 return -EFAULT;
 335
 336         memset(&tmp, 0, sizeof(tmp));
 337         tmp.line                = port->serial->minor;
 338         tmp.port                = 0;
 339         tmp.irq                 = 0;
 340         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 341         tmp.xmit_fifo_size      = port->bulk_out_size;
 342         tmp.baud_base           = 9600;
 343         tmp.close_delay         = 5*HZ;
 344         tmp.closing_wait        = 30*HZ;
 345
 346         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
 347                 return -EFAULT;
 348         return 0;
 349 }
 350
 351 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
 352 {
 353         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 354         struct async_icount prev, cur;
 355         unsigned long flags;
 356
 357         spin_lock_irqsave(&priv->status_lock, flags);
 358         prev = priv->icount;
 359         spin_unlock_irqrestore(&priv->status_lock, flags);
 360
 361         while (1) {
 362                 wait_event_interruptible(priv->delta_msr_wait,
 363                                          ((priv->icount.rng != prev.rng) ||
 364                                           (priv->icount.dsr != prev.dsr) ||
 365                                           (priv->icount.dcd != prev.dcd) ||
 366                                           (priv->icount.cts != prev.cts)));
 367
 368                 if (signal_pending(current))
 369                         return -ERESTARTSYS;
 370
 371                 spin_lock_irqsave(&priv->status_lock, flags);
 372                 cur = priv->icount;
 373                 spin_unlock_irqrestore(&priv->status_lock, flags);
 374
 375                 if ((prev.rng == cur.rng) &&
 376                     (prev.dsr == cur.dsr) &&
 377                     (prev.dcd == cur.dcd) &&
 378                     (prev.cts == cur.cts))
 379                         return -EIO;
 380
 381                 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
 382                     (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
 383                     (arg & TIOCM_CD  && (prev.dcd != cur.dcd)) ||
 384                     (arg & TIOCM_CTS && (prev.cts != cur.cts)))
 385                         return 0;
 386         }
 387         return 0;
 388 }
 389
 390 static int ssu100_get_icount(struct tty_struct *tty,
 391                         struct serial_icounter_struct *icount)
 392 {
 393         struct usb_serial_port *port = tty->driver_data;
 394         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 395         struct async_icount cnow = priv->icount;
 396
 397         icount->cts = cnow.cts;
 398         icount->dsr = cnow.dsr;
 399         icount->rng = cnow.rng;
 400         icount->dcd = cnow.dcd;
 401         icount->rx = cnow.rx;
 402         icount->tx = cnow.tx;
 403         icount->frame = cnow.frame;
 404         icount->overrun = cnow.overrun;
 405         icount->parity = cnow.parity;
 406         icount->brk = cnow.brk;
 407         icount->buf_overrun = cnow.buf_overrun;
 408
 409         return 0;
 410 }
 411
 412
 413
 414 static int ssu100_ioctl(struct tty_struct *tty,
 415                     unsigned int cmd, unsigned long arg)
 416 {
 417         struct usb_serial_port *port = tty->driver_data;
 418
 419         dbg("%s cmd 0x%04x", __func__, cmd);
 420
 421         switch (cmd) {
 422         case TIOCGSERIAL:
 423                 return get_serial_info(port,
 424                                        (struct serial_struct __user *) arg);
 425
 426         case TIOCMIWAIT:
 427                 return wait_modem_info(port, arg);
 428
 429         default:
 430                 break;
 431         }
 432
 433         dbg("%s arg not supported", __func__);
 434
 435         return -ENOIOCTLCMD;
 436 }
 437
 438 static int ssu100_attach(struct usb_serial *serial)
 439 {
 440         return ssu100_initdevice(serial->dev);
 441 }
 442
 443 static int ssu100_port_probe(struct usb_serial_port *port)
 444 {
 445         struct ssu100_port_private *priv;
 446
 447         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 448         if (!priv)
 449                 return -ENOMEM;
 450
 451         spin_lock_init(&priv->status_lock);
 452         init_waitqueue_head(&priv->delta_msr_wait);
 453
 454         usb_set_serial_port_data(port, priv);
 455
 456         return 0;
 457 }
 458
 459 static int ssu100_port_remove(struct usb_serial_port *port)
 460 {
 461         struct ssu100_port_private *priv;
 462
 463         priv = usb_get_serial_port_data(port);
 464         kfree(priv);
 465
 466         return 0;
 467 }
 468
 469 static int ssu100_tiocmget(struct tty_struct *tty)
 470 {
 471         struct usb_serial_port *port = tty->driver_data;
 472         struct usb_device *dev = port->serial->dev;
 473         u8 *d;
 474         int r;
 475
 476         d = kzalloc(2, GFP_KERNEL);
 477         if (!d)
 478                 return -ENOMEM;
 479
 480         r = ssu100_getregister(dev, 0, UART_MCR, d);
 481         if (r < 0)
 482                 goto mget_out;
 483
 484         r = ssu100_getregister(dev, 0, UART_MSR, d+1);
 485         if (r < 0)
 486                 goto mget_out;
 487
 488         r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
 489                 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
 490                 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
 491                 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
 492                 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
 493                 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
 494
 495 mget_out:
 496         kfree(d);
 497         return r;
 498 }
 499
 500 static int ssu100_tiocmset(struct tty_struct *tty,
 501                            unsigned int set, unsigned int clear)
 502 {
 503         struct usb_serial_port *port = tty->driver_data;
 504         struct usb_device *dev = port->serial->dev;
 505
 506         return update_mctrl(dev, set, clear);
 507 }
 508
 509 static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 510 {
 511         struct usb_device *dev = port->serial->dev;
 512
 513         mutex_lock(&port->serial->disc_mutex);
 514         if (!port->serial->disconnected) {
 515                 /* Disable flow control */
 516                 if (!on &&
 517                     ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
 518                         dev_err(&port->dev, "error from flowcontrol urb\n");
 519                 /* drop RTS and DTR */
 520                 if (on)
 521                         set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 522                 else
 523                         clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 524         }
 525         mutex_unlock(&port->serial->disc_mutex);
 526 }
 527
 528 static void ssu100_update_msr(struct usb_serial_port *port, u8 msr)
 529 {
 530         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 531         unsigned long flags;
 532
 533         spin_lock_irqsave(&priv->status_lock, flags);
 534         priv->shadowMSR = msr;
 535         spin_unlock_irqrestore(&priv->status_lock, flags);
 536
 537         if (msr & UART_MSR_ANY_DELTA) {
 538                 /* update input line counters */
 539                 if (msr & UART_MSR_DCTS)
 540                         priv->icount.cts++;
 541                 if (msr & UART_MSR_DDSR)
 542                         priv->icount.dsr++;
 543                 if (msr & UART_MSR_DDCD)
 544                         priv->icount.dcd++;
 545                 if (msr & UART_MSR_TERI)
 546                         priv->icount.rng++;
 547                 wake_up_interruptible(&priv->delta_msr_wait);
 548         }
 549 }
 550
 551 static void ssu100_update_lsr(struct usb_serial_port *port, u8 lsr,
 552                               char *tty_flag)
 553 {
 554         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 555         unsigned long flags;
 556
 557         spin_lock_irqsave(&priv->status_lock, flags);
 558         priv->shadowLSR = lsr;
 559         spin_unlock_irqrestore(&priv->status_lock, flags);
 560
 561         *tty_flag = TTY_NORMAL;
 562         if (lsr & UART_LSR_BRK_ERROR_BITS) {
 563                 /* we always want to update icount, but we only want to
 564                  * update tty_flag for one case */
 565                 if (lsr & UART_LSR_BI) {
 566                         priv->icount.brk++;
 567                         *tty_flag = TTY_BREAK;
 568                         usb_serial_handle_break(port);
 569                 }
 570                 if (lsr & UART_LSR_PE) {
 571                         priv->icount.parity++;
 572                         if (*tty_flag == TTY_NORMAL)
 573                                 *tty_flag = TTY_PARITY;
 574                 }
 575                 if (lsr & UART_LSR_FE) {
 576                         priv->icount.frame++;
 577                         if (*tty_flag == TTY_NORMAL)
 578                                 *tty_flag = TTY_FRAME;
 579                 }
 580                 if (lsr & UART_LSR_OE){
 581                         priv->icount.overrun++;
 582                         if (*tty_flag == TTY_NORMAL)
 583                                 *tty_flag = TTY_OVERRUN;
 584                 }
 585         }
 586
 587 }
 588
 589 static int ssu100_process_packet(struct urb *urb,
 590                                  struct tty_struct *tty)
 591 {
 592         struct usb_serial_port *port = urb->context;
 593         char *packet = (char *)urb->transfer_buffer;
 594         char flag = TTY_NORMAL;
 595         u32 len = urb->actual_length;
 596         int i;
 597         char *ch;
 598
 599         if ((len >= 4) &&
 600             (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 601             ((packet[2] == 0x00) || (packet[2] == 0x01))) {
 602                 if (packet[2] == 0x00) {
 603                         ssu100_update_lsr(port, packet[3], &flag);
 604                         if (flag == TTY_OVERRUN)
 605                                 tty_insert_flip_char(tty, 0, TTY_OVERRUN);
 606                 }
 607                 if (packet[2] == 0x01)
 608                         ssu100_update_msr(port, packet[3]);
 609
 610                 len -= 4;
 611                 ch = packet + 4;
 612         } else
 613                 ch = packet;
 614
 615         if (!len)
 616                 return 0;       /* status only */
 617
 618         if (port->port.console && port->sysrq) {
 619                 for (i = 0; i < len; i++, ch++) {
 620                         if (!usb_serial_handle_sysrq_char(port, *ch))
 621                                 tty_insert_flip_char(tty, *ch, flag);
 622                 }
 623         } else
 624                 tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
 625
 626         return len;
 627 }
 628
 629 static void ssu100_process_read_urb(struct urb *urb)
 630 {
 631         struct usb_serial_port *port = urb->context;
 632         struct tty_struct *tty;
 633         int count;
 634
 635         tty = tty_port_tty_get(&port->port);
 636         if (!tty)
 637                 return;
 638
 639         count = ssu100_process_packet(urb, tty);
 640
 641         if (count)
 642                 tty_flip_buffer_push(tty);
 643         tty_kref_put(tty);
 644 }
 645
 646 static struct usb_serial_driver ssu100_device = {
 647         .driver = {
 648                 .owner = THIS_MODULE,
 649                 .name = "ssu100",
 650         },
 651         .description         = DRIVER_DESC,
 652         .id_table            = id_table,
 653         .num_ports           = 1,
 654         .open                = ssu100_open,
 655         .close               = ssu100_close,
 656         .attach              = ssu100_attach,
 657         .port_probe          = ssu100_port_probe,
 658         .port_remove         = ssu100_port_remove,
 659         .dtr_rts             = ssu100_dtr_rts,
 660         .process_read_urb    = ssu100_process_read_urb,
 661         .tiocmget            = ssu100_tiocmget,
 662         .tiocmset            = ssu100_tiocmset,
 663         .get_icount          = ssu100_get_icount,
 664         .ioctl               = ssu100_ioctl,
 665         .set_termios         = ssu100_set_termios,
 666         .disconnect          = usb_serial_generic_disconnect,
 667 };
 668
 669 static struct usb_serial_driver * const serial_drivers[] = {
 670         &ssu100_device, NULL
 671 };
 672
 673 module_usb_serial_driver(serial_drivers, id_table);
 674
 675 MODULE_DESCRIPTION(DRIVER_DESC);
 676 MODULE_LICENSE("GPL");
 677
 678 module_param(debug, bool, S_IRUGO | S_IWUSR);
 679 MODULE_PARM_DESC(debug, "Debug enabled or not");