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 void ssu100_release(struct usb_serial *serial)
  73 {
  74         struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port);
  75
  76         kfree(priv);
  77 }
  78
  79 static inline int ssu100_control_msg(struct usb_device *dev,
  80                                      u8 request, u16 data, u16 index)
  81 {
  82         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
  83                                request, 0x40, data, index,
  84                                NULL, 0, 300);
  85 }
  86
  87 static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
  88 {
  89         u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));
  90
  91         return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
  92 }
  93
  94
  95 static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
  96 {
  97         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
  98                                QT_SET_GET_DEVICE, 0xc0, 0, 0,
  99                                data, 3, 300);
 100 }
 101
 102 static inline int ssu100_getregister(struct usb_device *dev,
 103                                      unsigned short uart,
 104                                      unsigned short reg,
 105                                      u8 *data)
 106 {
 107         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 108                                QT_SET_GET_REGISTER, 0xc0, reg,
 109                                uart, data, sizeof(*data), 300);
 110
 111 }
 112
 113
 114 static inline int ssu100_setregister(struct usb_device *dev,
 115                                      unsigned short uart,
 116                                      unsigned short reg,
 117                                      u16 data)
 118 {
 119         u16 value = (data << 8) | reg;
 120
 121         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 122                                QT_SET_GET_REGISTER, 0x40, value, uart,
 123                                NULL, 0, 300);
 124
 125 }
 126
 127 #define set_mctrl(dev, set)             update_mctrl((dev), (set), 0)
 128 #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
 129
 130 /* these do not deal with device that have more than 1 port */
 131 static inline int update_mctrl(struct usb_device *dev, unsigned int set,
 132                                unsigned int clear)
 133 {
 134         unsigned urb_value;
 135         int result;
 136
 137         if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
 138                 dbg("%s - DTR|RTS not being set|cleared", __func__);
 139                 return 0;       /* no change */
 140         }
 141
 142         clear &= ~set;  /* 'set' takes precedence over 'clear' */
 143         urb_value = 0;
 144         if (set & TIOCM_DTR)
 145                 urb_value |= UART_MCR_DTR;
 146         if (set & TIOCM_RTS)
 147                 urb_value |= UART_MCR_RTS;
 148
 149         result = ssu100_setregister(dev, 0, UART_MCR, urb_value);
 150         if (result < 0)
 151                 dbg("%s Error from MODEM_CTRL urb", __func__);
 152
 153         return result;
 154 }
 155
 156 static int ssu100_initdevice(struct usb_device *dev)
 157 {
 158         u8 *data;
 159         int result = 0;
 160
 161         data = kzalloc(3, GFP_KERNEL);
 162         if (!data)
 163                 return -ENOMEM;
 164
 165         result = ssu100_getdevice(dev, data);
 166         if (result < 0) {
 167                 dbg("%s - get_device failed %i", __func__, result);
 168                 goto out;
 169         }
 170
 171         data[1] &= ~FULLPWRBIT;
 172
 173         result = ssu100_setdevice(dev, data);
 174         if (result < 0) {
 175                 dbg("%s - setdevice failed %i", __func__, result);
 176                 goto out;
 177         }
 178
 179         result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
 180         if (result < 0) {
 181                 dbg("%s - set prebuffer level failed %i", __func__, result);
 182                 goto out;
 183         }
 184
 185         result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
 186         if (result < 0) {
 187                 dbg("%s - set ATFprebuffer level failed %i", __func__, result);
 188                 goto out;
 189         }
 190
 191         result = ssu100_getdevice(dev, data);
 192         if (result < 0) {
 193                 dbg("%s - get_device failed %i", __func__, result);
 194                 goto out;
 195         }
 196
 197         data[0] &= ~(RR_BITS | DUPMODE_BITS);
 198         data[0] |= CLKS_X4;
 199         data[1] &= ~(LOOPMODE_BITS);
 200         data[1] |= RS232_MODE;
 201
 202         result = ssu100_setdevice(dev, data);
 203         if (result < 0) {
 204                 dbg("%s - setdevice failed %i", __func__, result);
 205                 goto out;
 206         }
 207
 208 out:    kfree(data);
 209         return result;
 210
 211 }
 212
 213
 214 static void ssu100_set_termios(struct tty_struct *tty,
 215                                struct usb_serial_port *port,
 216                                struct ktermios *old_termios)
 217 {
 218         struct usb_device *dev = port->serial->dev;
 219         struct ktermios *termios = tty->termios;
 220         u16 baud, divisor, remainder;
 221         unsigned int cflag = termios->c_cflag;
 222         u16 urb_value = 0; /* will hold the new flags */
 223         int result;
 224
 225         if (cflag & PARENB) {
 226                 if (cflag & PARODD)
 227                         urb_value |= UART_LCR_PARITY;
 228                 else
 229                         urb_value |= SERIAL_EVEN_PARITY;
 230         }
 231
 232         switch (cflag & CSIZE) {
 233         case CS5:
 234                 urb_value |= UART_LCR_WLEN5;
 235                 break;
 236         case CS6:
 237                 urb_value |= UART_LCR_WLEN6;
 238                 break;
 239         case CS7:
 240                 urb_value |= UART_LCR_WLEN7;
 241                 break;
 242         default:
 243         case CS8:
 244                 urb_value |= UART_LCR_WLEN8;
 245                 break;
 246         }
 247
 248         baud = tty_get_baud_rate(tty);
 249         if (!baud)
 250                 baud = 9600;
 251
 252         dbg("%s - got baud = %d\n", __func__, baud);
 253
 254
 255         divisor = MAX_BAUD_RATE / baud;
 256         remainder = MAX_BAUD_RATE % baud;
 257         if (((remainder * 2) >= baud) && (baud != 110))
 258                 divisor++;
 259
 260         urb_value = urb_value << 8;
 261
 262         result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
 263         if (result < 0)
 264                 dbg("%s - set uart failed", __func__);
 265
 266         if (cflag & CRTSCTS)
 267                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 268                                             SERIAL_CRTSCTS, 0);
 269         else
 270                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 271                                             0, 0);
 272         if (result < 0)
 273                 dbg("%s - set HW flow control failed", __func__);
 274
 275         if (I_IXOFF(tty) || I_IXON(tty)) {
 276                 u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));
 277
 278                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 279                                             x, 0);
 280         } else
 281                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 282                                             0, 0);
 283
 284         if (result < 0)
 285                 dbg("%s - set SW flow control failed", __func__);
 286
 287 }
 288
 289
 290 static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 291 {
 292         struct usb_device *dev = port->serial->dev;
 293         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 294         u8 *data;
 295         int result;
 296         unsigned long flags;
 297
 298         data = kzalloc(2, GFP_KERNEL);
 299         if (!data)
 300                 return -ENOMEM;
 301
 302         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 303                                  QT_OPEN_CLOSE_CHANNEL,
 304                                  QT_TRANSFER_IN, 0x01,
 305                                  0, data, 2, 300);
 306         if (result < 0) {
 307                 dbg("%s - open failed %i", __func__, result);
 308                 kfree(data);
 309                 return result;
 310         }
 311
 312         spin_lock_irqsave(&priv->status_lock, flags);
 313         priv->shadowLSR = data[0];
 314         priv->shadowMSR = data[1];
 315         spin_unlock_irqrestore(&priv->status_lock, flags);
 316
 317         kfree(data);
 318
 319 /* set to 9600 */
 320         result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
 321         if (result < 0)
 322                 dbg("%s - set uart failed", __func__);
 323
 324         if (tty)
 325                 ssu100_set_termios(tty, port, tty->termios);
 326
 327         return usb_serial_generic_open(tty, port);
 328 }
 329
 330 static void ssu100_close(struct usb_serial_port *port)
 331 {
 332         usb_serial_generic_close(port);
 333 }
 334
 335 static int get_serial_info(struct usb_serial_port *port,
 336                            struct serial_struct __user *retinfo)
 337 {
 338         struct serial_struct tmp;
 339
 340         if (!retinfo)
 341                 return -EFAULT;
 342
 343         memset(&tmp, 0, sizeof(tmp));
 344         tmp.line                = port->serial->minor;
 345         tmp.port                = 0;
 346         tmp.irq                 = 0;
 347         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 348         tmp.xmit_fifo_size      = port->bulk_out_size;
 349         tmp.baud_base           = 9600;
 350         tmp.close_delay         = 5*HZ;
 351         tmp.closing_wait        = 30*HZ;
 352
 353         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
 354                 return -EFAULT;
 355         return 0;
 356 }
 357
 358 static int wait_modem_info(struct usb_serial_port *port, unsigned int arg)
 359 {
 360         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 361         struct async_icount prev, cur;
 362         unsigned long flags;
 363
 364         spin_lock_irqsave(&priv->status_lock, flags);
 365         prev = priv->icount;
 366         spin_unlock_irqrestore(&priv->status_lock, flags);
 367
 368         while (1) {
 369                 wait_event_interruptible(priv->delta_msr_wait,
 370                                          ((priv->icount.rng != prev.rng) ||
 371                                           (priv->icount.dsr != prev.dsr) ||
 372                                           (priv->icount.dcd != prev.dcd) ||
 373                                           (priv->icount.cts != prev.cts)));
 374
 375                 if (signal_pending(current))
 376                         return -ERESTARTSYS;
 377
 378                 spin_lock_irqsave(&priv->status_lock, flags);
 379                 cur = priv->icount;
 380                 spin_unlock_irqrestore(&priv->status_lock, flags);
 381
 382                 if ((prev.rng == cur.rng) &&
 383                     (prev.dsr == cur.dsr) &&
 384                     (prev.dcd == cur.dcd) &&
 385                     (prev.cts == cur.cts))
 386                         return -EIO;
 387
 388                 if ((arg & TIOCM_RNG && (prev.rng != cur.rng)) ||
 389                     (arg & TIOCM_DSR && (prev.dsr != cur.dsr)) ||
 390                     (arg & TIOCM_CD  && (prev.dcd != cur.dcd)) ||
 391                     (arg & TIOCM_CTS && (prev.cts != cur.cts)))
 392                         return 0;
 393         }
 394         return 0;
 395 }
 396
 397 static int ssu100_get_icount(struct tty_struct *tty,
 398                         struct serial_icounter_struct *icount)
 399 {
 400         struct usb_serial_port *port = tty->driver_data;
 401         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 402         struct async_icount cnow = priv->icount;
 403
 404         icount->cts = cnow.cts;
 405         icount->dsr = cnow.dsr;
 406         icount->rng = cnow.rng;
 407         icount->dcd = cnow.dcd;
 408         icount->rx = cnow.rx;
 409         icount->tx = cnow.tx;
 410         icount->frame = cnow.frame;
 411         icount->overrun = cnow.overrun;
 412         icount->parity = cnow.parity;
 413         icount->brk = cnow.brk;
 414         icount->buf_overrun = cnow.buf_overrun;
 415
 416         return 0;
 417 }
 418
 419
 420
 421 static int ssu100_ioctl(struct tty_struct *tty,
 422                     unsigned int cmd, unsigned long arg)
 423 {
 424         struct usb_serial_port *port = tty->driver_data;
 425
 426         dbg("%s cmd 0x%04x", __func__, cmd);
 427
 428         switch (cmd) {
 429         case TIOCGSERIAL:
 430                 return get_serial_info(port,
 431                                        (struct serial_struct __user *) arg);
 432
 433         case TIOCMIWAIT:
 434                 return wait_modem_info(port, arg);
 435
 436         default:
 437                 break;
 438         }
 439
 440         dbg("%s arg not supported", __func__);
 441
 442         return -ENOIOCTLCMD;
 443 }
 444
 445 static int ssu100_attach(struct usb_serial *serial)
 446 {
 447         struct ssu100_port_private *priv;
 448         struct usb_serial_port *port = *serial->port;
 449
 450         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 451         if (!priv) {
 452                 dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
 453                         sizeof(*priv));
 454                 return -ENOMEM;
 455         }
 456
 457         spin_lock_init(&priv->status_lock);
 458         init_waitqueue_head(&priv->delta_msr_wait);
 459         usb_set_serial_port_data(port, priv);
 460
 461         return ssu100_initdevice(serial->dev);
 462 }
 463
 464 static int ssu100_tiocmget(struct tty_struct *tty)
 465 {
 466         struct usb_serial_port *port = tty->driver_data;
 467         struct usb_device *dev = port->serial->dev;
 468         u8 *d;
 469         int r;
 470
 471         d = kzalloc(2, GFP_KERNEL);
 472         if (!d)
 473                 return -ENOMEM;
 474
 475         r = ssu100_getregister(dev, 0, UART_MCR, d);
 476         if (r < 0)
 477                 goto mget_out;
 478
 479         r = ssu100_getregister(dev, 0, UART_MSR, d+1);
 480         if (r < 0)
 481                 goto mget_out;
 482
 483         r = (d[0] & UART_MCR_DTR ? TIOCM_DTR : 0) |
 484                 (d[0] & UART_MCR_RTS ? TIOCM_RTS : 0) |
 485                 (d[1] & UART_MSR_CTS ? TIOCM_CTS : 0) |
 486                 (d[1] & UART_MSR_DCD ? TIOCM_CAR : 0) |
 487                 (d[1] & UART_MSR_RI ? TIOCM_RI : 0) |
 488                 (d[1] & UART_MSR_DSR ? TIOCM_DSR : 0);
 489
 490 mget_out:
 491         kfree(d);
 492         return r;
 493 }
 494
 495 static int ssu100_tiocmset(struct tty_struct *tty,
 496                            unsigned int set, unsigned int clear)
 497 {
 498         struct usb_serial_port *port = tty->driver_data;
 499         struct usb_device *dev = port->serial->dev;
 500
 501         return update_mctrl(dev, set, clear);
 502 }
 503
 504 static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 505 {
 506         struct usb_device *dev = port->serial->dev;
 507
 508         mutex_lock(&port->serial->disc_mutex);
 509         if (!port->serial->disconnected) {
 510                 /* Disable flow control */
 511                 if (!on &&
 512                     ssu100_setregister(dev, 0, UART_MCR, 0) < 0)
 513                         dev_err(&port->dev, "error from flowcontrol urb\n");
 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         mutex_unlock(&port->serial->disc_mutex);
 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(&priv->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 int ssu100_process_packet(struct urb *urb,
 585                                  struct tty_struct *tty)
 586 {
 587         struct usb_serial_port *port = urb->context;
 588         char *packet = (char *)urb->transfer_buffer;
 589         char flag = TTY_NORMAL;
 590         u32 len = urb->actual_length;
 591         int i;
 592         char *ch;
 593
 594         if ((len >= 4) &&
 595             (packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 596             ((packet[2] == 0x00) || (packet[2] == 0x01))) {
 597                 if (packet[2] == 0x00) {
 598                         ssu100_update_lsr(port, packet[3], &flag);
 599                         if (flag == TTY_OVERRUN)
 600                                 tty_insert_flip_char(tty, 0, 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 0;       /* 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(tty, *ch, flag);
 617                 }
 618         } else
 619                 tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
 620
 621         return len;
 622 }
 623
 624 static void ssu100_process_read_urb(struct urb *urb)
 625 {
 626         struct usb_serial_port *port = urb->context;
 627         struct tty_struct *tty;
 628         int count;
 629
 630         tty = tty_port_tty_get(&port->port);
 631         if (!tty)
 632                 return;
 633
 634         count = ssu100_process_packet(urb, tty);
 635
 636         if (count)
 637                 tty_flip_buffer_push(tty);
 638         tty_kref_put(tty);
 639 }
 640
 641 static struct usb_serial_driver ssu100_device = {
 642         .driver = {
 643                 .owner = THIS_MODULE,
 644                 .name = "ssu100",
 645         },
 646         .description         = DRIVER_DESC,
 647         .id_table            = id_table,
 648         .num_ports           = 1,
 649         .open                = ssu100_open,
 650         .close               = ssu100_close,
 651         .attach              = ssu100_attach,
 652         .release             = ssu100_release,
 653         .dtr_rts             = ssu100_dtr_rts,
 654         .process_read_urb    = ssu100_process_read_urb,
 655         .tiocmget            = ssu100_tiocmget,
 656         .tiocmset            = ssu100_tiocmset,
 657         .get_icount          = ssu100_get_icount,
 658         .ioctl               = ssu100_ioctl,
 659         .set_termios         = ssu100_set_termios,
 660         .disconnect          = usb_serial_generic_disconnect,
 661 };
 662
 663 static struct usb_serial_driver * const serial_drivers[] = {
 664         &ssu100_device, NULL
 665 };
 666
 667 module_usb_serial_driver(serial_drivers, id_table);
 668
 669 MODULE_DESCRIPTION(DRIVER_DESC);
 670 MODULE_LICENSE("GPL");
 671
 672 module_param(debug, bool, S_IRUGO | S_IWUSR);
 673 MODULE_PARM_DESC(debug, "Debug enabled or not");