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/uaccess.h>
  19
  20 #define QT_OPEN_CLOSE_CHANNEL       0xca
  21 #define QT_SET_GET_DEVICE           0xc2
  22 #define QT_SET_GET_REGISTER         0xc0
  23 #define QT_GET_SET_PREBUF_TRIG_LVL  0xcc
  24 #define QT_SET_ATF                  0xcd
  25 #define QT_GET_SET_UART             0xc1
  26 #define QT_TRANSFER_IN              0xc0
  27 #define QT_HW_FLOW_CONTROL_MASK     0xc5
  28 #define QT_SW_FLOW_CONTROL_MASK     0xc6
  29
  30 #define MODEM_CTL_REGISTER         0x04
  31 #define MODEM_STATUS_REGISTER      0x06
  32
  33
  34 #define SERIAL_LSR_OE       0x02
  35 #define SERIAL_LSR_PE       0x04
  36 #define SERIAL_LSR_FE       0x08
  37 #define SERIAL_LSR_BI       0x10
  38
  39 #define SERIAL_LSR_TEMT     0x40
  40
  41 #define  SERIAL_MCR_DTR             0x01
  42 #define  SERIAL_MCR_RTS             0x02
  43 #define  SERIAL_MCR_LOOP            0x10
  44
  45 #define  SERIAL_MSR_CTS             0x10
  46 #define  SERIAL_MSR_CD              0x80
  47 #define  SERIAL_MSR_RI              0x40
  48 #define  SERIAL_MSR_DSR             0x20
  49 #define  SERIAL_MSR_MASK            0xf0
  50
  51 #define  SERIAL_CRTSCTS ((SERIAL_MCR_RTS << 8) | SERIAL_MSR_CTS)
  52
  53 #define  SERIAL_8_DATA              0x03
  54 #define  SERIAL_7_DATA              0x02
  55 #define  SERIAL_6_DATA              0x01
  56 #define  SERIAL_5_DATA              0x00
  57
  58 #define  SERIAL_ODD_PARITY          0X08
  59 #define  SERIAL_EVEN_PARITY         0X18
  60
  61 #define  MAX_BAUD_RATE              460800
  62
  63 #define ATC_DISABLED                0x00
  64 #define DUPMODE_BITS        0xc0
  65 #define RR_BITS             0x03
  66 #define LOOPMODE_BITS       0x41
  67 #define RS232_MODE          0x00
  68 #define RTSCTS_TO_CONNECTOR 0x40
  69 #define CLKS_X4             0x02
  70 #define FULLPWRBIT          0x00000080
  71 #define NEXT_BOARD_POWER_BIT        0x00000004
  72
  73 static int debug = 1;
  74
  75 /* Version Information */
  76 #define DRIVER_VERSION "v0.1"
  77 #define DRIVER_DESC "Quatech SSU-100 USB to Serial Driver"
  78
  79 #define USB_VENDOR_ID_QUATECH   0x061d  /* Quatech VID */
  80 #define QUATECH_SSU100  0xC020  /* SSU100 */
  81
  82 static const struct usb_device_id id_table[] = {
  83         {USB_DEVICE(USB_VENDOR_ID_QUATECH, QUATECH_SSU100)},
  84         {}                      /* Terminating entry */
  85 };
  86
  87 MODULE_DEVICE_TABLE(usb, id_table);
  88
  89
  90 static struct usb_driver ssu100_driver = {
  91         .name                          = "ssu100",
  92         .probe                         = usb_serial_probe,
  93         .disconnect                    = usb_serial_disconnect,
  94         .id_table                      = id_table,
  95         .suspend                       = usb_serial_suspend,
  96         .resume                        = usb_serial_resume,
  97         .no_dynamic_id                 = 1,
  98         .supports_autosuspend          = 1,
  99 };
 100
 101 struct ssu100_port_private {
 102         spinlock_t status_lock;
 103         u8 shadowLSR;
 104         u8 shadowMSR;
 105         wait_queue_head_t delta_msr_wait; /* Used for TIOCMIWAIT */
 106         unsigned short max_packet_size;
 107 };
 108
 109 static void ssu100_release(struct usb_serial *serial)
 110 {
 111         struct ssu100_port_private *priv = usb_get_serial_port_data(*serial->port);
 112
 113         dbg("%s", __func__);
 114         kfree(priv);
 115 }
 116
 117 static inline int ssu100_control_msg(struct usb_device *dev,
 118                                      u8 request, u16 data, u16 index)
 119 {
 120         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 121                                request, 0x40, data, index,
 122                                NULL, 0, 300);
 123 }
 124
 125 static inline int ssu100_setdevice(struct usb_device *dev, u8 *data)
 126 {
 127         u16 x = ((u16)(data[1] << 8) | (u16)(data[0]));
 128
 129         return ssu100_control_msg(dev, QT_SET_GET_DEVICE, x, 0);
 130 }
 131
 132
 133 static inline int ssu100_getdevice(struct usb_device *dev, u8 *data)
 134 {
 135         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 136                                QT_SET_GET_DEVICE, 0xc0, 0, 0,
 137                                data, 3, 300);
 138 }
 139
 140 static inline int ssu100_getregister(struct usb_device *dev,
 141                                      unsigned short uart,
 142                                      unsigned short reg,
 143                                      u8 *data)
 144 {
 145         return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 146                                QT_SET_GET_REGISTER, 0xc0, reg,
 147                                uart, data, sizeof(*data), 300);
 148
 149 }
 150
 151
 152 static inline int ssu100_setregister(struct usb_device *dev,
 153                                      unsigned short uart,
 154                                      u16 data)
 155 {
 156         u16 value = (data << 8) | MODEM_CTL_REGISTER;
 157
 158         return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
 159                                QT_SET_GET_REGISTER, 0x40, value, uart,
 160                                NULL, 0, 300);
 161
 162 }
 163
 164 #define set_mctrl(dev, set)             update_mctrl((dev), (set), 0)
 165 #define clear_mctrl(dev, clear) update_mctrl((dev), 0, (clear))
 166
 167 /* these do not deal with device that have more than 1 port */
 168 static inline int update_mctrl(struct usb_device *dev, unsigned int set,
 169                                unsigned int clear)
 170 {
 171         unsigned urb_value;
 172         int result;
 173
 174         if (((set | clear) & (TIOCM_DTR | TIOCM_RTS)) == 0) {
 175                 dbg("%s - DTR|RTS not being set|cleared", __func__);
 176                 return 0;       /* no change */
 177         }
 178
 179         clear &= ~set;  /* 'set' takes precedence over 'clear' */
 180         urb_value = 0;
 181         if (set & TIOCM_DTR)
 182                 urb_value |= SERIAL_MCR_DTR;
 183         if (set & TIOCM_RTS)
 184                 urb_value |= SERIAL_MCR_RTS;
 185
 186         result = ssu100_setregister(dev, 0, urb_value);
 187         if (result < 0)
 188                 dbg("%s Error from MODEM_CTRL urb", __func__);
 189
 190         return result;
 191 }
 192
 193 static int ssu100_initdevice(struct usb_device *dev)
 194 {
 195         u8 *data;
 196         int result = 0;
 197
 198         dbg("%s", __func__);
 199
 200         data = kzalloc(3, GFP_KERNEL);
 201         if (!data)
 202                 return -ENOMEM;
 203
 204         result = ssu100_getdevice(dev, data);
 205         if (result < 0) {
 206                 dbg("%s - get_device failed %i", __func__, result);
 207                 goto out;
 208         }
 209
 210         data[1] &= ~FULLPWRBIT;
 211
 212         result = ssu100_setdevice(dev, data);
 213         if (result < 0) {
 214                 dbg("%s - setdevice failed %i", __func__, result);
 215                 goto out;
 216         }
 217
 218         result = ssu100_control_msg(dev, QT_GET_SET_PREBUF_TRIG_LVL, 128, 0);
 219         if (result < 0) {
 220                 dbg("%s - set prebuffer level failed %i", __func__, result);
 221                 goto out;
 222         }
 223
 224         result = ssu100_control_msg(dev, QT_SET_ATF, ATC_DISABLED, 0);
 225         if (result < 0) {
 226                 dbg("%s - set ATFprebuffer level failed %i", __func__, result);
 227                 goto out;
 228         }
 229
 230         result = ssu100_getdevice(dev, data);
 231         if (result < 0) {
 232                 dbg("%s - get_device failed %i", __func__, result);
 233                 goto out;
 234         }
 235
 236         data[0] &= ~(RR_BITS | DUPMODE_BITS);
 237         data[0] |= CLKS_X4;
 238         data[1] &= ~(LOOPMODE_BITS);
 239         data[1] |= RS232_MODE;
 240
 241         result = ssu100_setdevice(dev, data);
 242         if (result < 0) {
 243                 dbg("%s - setdevice failed %i", __func__, result);
 244                 goto out;
 245         }
 246
 247 out:    kfree(data);
 248         return result;
 249
 250 }
 251
 252
 253 static void ssu100_set_termios(struct tty_struct *tty,
 254                                struct usb_serial_port *port,
 255                                struct ktermios *old_termios)
 256 {
 257         struct usb_device *dev = port->serial->dev;
 258         struct ktermios *termios = tty->termios;
 259         u16 baud, divisor, remainder;
 260         unsigned int cflag = termios->c_cflag;
 261         u16 urb_value = 0; /* will hold the new flags */
 262         int result;
 263
 264         dbg("%s", __func__);
 265
 266         if (cflag & PARENB) {
 267                 if (cflag & PARODD)
 268                         urb_value |= SERIAL_ODD_PARITY;
 269                 else
 270                         urb_value |= SERIAL_EVEN_PARITY;
 271         }
 272
 273         switch (cflag & CSIZE) {
 274         case CS5:
 275                 urb_value |= SERIAL_5_DATA;
 276                 break;
 277         case CS6:
 278                 urb_value |= SERIAL_6_DATA;
 279                 break;
 280         case CS7:
 281                 urb_value |= SERIAL_7_DATA;
 282                 break;
 283         default:
 284         case CS8:
 285                 urb_value |= SERIAL_8_DATA;
 286                 break;
 287         }
 288
 289         baud = tty_get_baud_rate(tty);
 290         if (!baud)
 291                 baud = 9600;
 292
 293         dbg("%s - got baud = %d\n", __func__, baud);
 294
 295
 296         divisor = MAX_BAUD_RATE / baud;
 297         remainder = MAX_BAUD_RATE % baud;
 298         if (((remainder * 2) >= baud) && (baud != 110))
 299                 divisor++;
 300
 301         urb_value = urb_value << 8;
 302
 303         result = ssu100_control_msg(dev, QT_GET_SET_UART, divisor, urb_value);
 304         if (result < 0)
 305                 dbg("%s - set uart failed", __func__);
 306
 307         if (cflag & CRTSCTS)
 308                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 309                                             SERIAL_CRTSCTS, 0);
 310         else
 311                 result = ssu100_control_msg(dev, QT_HW_FLOW_CONTROL_MASK,
 312                                             0, 0);
 313         if (result < 0)
 314                 dbg("%s - set HW flow control failed", __func__);
 315
 316         if (I_IXOFF(tty) || I_IXON(tty)) {
 317                 u16 x = ((u16)(START_CHAR(tty) << 8) | (u16)(STOP_CHAR(tty)));
 318
 319                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 320                                             x, 0);
 321         } else
 322                 result = ssu100_control_msg(dev, QT_SW_FLOW_CONTROL_MASK,
 323                                             0, 0);
 324
 325         if (result < 0)
 326                 dbg("%s - set SW flow control failed", __func__);
 327
 328 }
 329
 330
 331 static int ssu100_open(struct tty_struct *tty, struct usb_serial_port *port)
 332 {
 333         struct usb_device *dev = port->serial->dev;
 334         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 335         u8 *data;
 336         int result;
 337         unsigned long flags;
 338
 339         dbg("%s - port %d", __func__, port->number);
 340
 341         data = kzalloc(2, GFP_KERNEL);
 342         if (!data)
 343                 return -ENOMEM;
 344
 345         result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
 346                                  QT_OPEN_CLOSE_CHANNEL,
 347                                  QT_TRANSFER_IN, 0x01,
 348                                  0, data, 2, 300);
 349         if (result < 0) {
 350                 dbg("%s - open failed %i", __func__, result);
 351                 kfree(data);
 352                 return result;
 353         }
 354
 355         spin_lock_irqsave(&priv->status_lock, flags);
 356         priv->shadowLSR = data[0]  & (SERIAL_LSR_OE | SERIAL_LSR_PE |
 357                                       SERIAL_LSR_FE | SERIAL_LSR_BI);
 358
 359         priv->shadowMSR = data[1]  & (SERIAL_MSR_CTS | SERIAL_MSR_DSR |
 360                                       SERIAL_MSR_RI | SERIAL_MSR_CD);
 361         spin_unlock_irqrestore(&priv->status_lock, flags);
 362
 363         kfree(data);
 364
 365 /* set to 9600 */
 366         result = ssu100_control_msg(dev, QT_GET_SET_UART, 0x30, 0x0300);
 367         if (result < 0)
 368                 dbg("%s - set uart failed", __func__);
 369
 370         if (tty)
 371                 ssu100_set_termios(tty, port, tty->termios);
 372
 373         return usb_serial_generic_open(tty, port);
 374 }
 375
 376 static void ssu100_close(struct usb_serial_port *port)
 377 {
 378         dbg("%s", __func__);
 379         usb_serial_generic_close(port);
 380 }
 381
 382 static int get_serial_info(struct usb_serial_port *port,
 383                            struct serial_struct __user *retinfo)
 384 {
 385         struct serial_struct tmp;
 386
 387         if (!retinfo)
 388                 return -EFAULT;
 389
 390         memset(&tmp, 0, sizeof(tmp));
 391         tmp.line                = port->serial->minor;
 392         tmp.port                = 0;
 393         tmp.irq                 = 0;
 394         tmp.flags               = ASYNC_SKIP_TEST | ASYNC_AUTO_IRQ;
 395         tmp.xmit_fifo_size      = port->bulk_out_size;
 396         tmp.baud_base           = 9600;
 397         tmp.close_delay         = 5*HZ;
 398         tmp.closing_wait        = 30*HZ;
 399
 400         if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
 401                 return -EFAULT;
 402         return 0;
 403 }
 404
 405 static int ssu100_ioctl(struct tty_struct *tty, struct file *file,
 406                     unsigned int cmd, unsigned long arg)
 407 {
 408         struct usb_serial_port *port = tty->driver_data;
 409         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 410
 411         dbg("%s cmd 0x%04x", __func__, cmd);
 412
 413         switch (cmd) {
 414         case TIOCGSERIAL:
 415                 return get_serial_info(port,
 416                                        (struct serial_struct __user *) arg);
 417
 418         case TIOCMIWAIT:
 419                 while (priv != NULL) {
 420                         u8 prevMSR = priv->shadowMSR & SERIAL_MSR_MASK;
 421                         interruptible_sleep_on(&priv->delta_msr_wait);
 422                         /* see if a signal did it */
 423                         if (signal_pending(current))
 424                                 return -ERESTARTSYS;
 425                         else {
 426                                 u8 diff = (priv->shadowMSR & SERIAL_MSR_MASK) ^ prevMSR;
 427                                 if (!diff)
 428                                         return -EIO; /* no change => error */
 429
 430                                 /* Return 0 if caller wanted to know about
 431                                    these bits */
 432
 433                                 if (((arg & TIOCM_RNG) && (diff & SERIAL_MSR_RI)) ||
 434                                     ((arg & TIOCM_DSR) && (diff & SERIAL_MSR_DSR)) ||
 435                                     ((arg & TIOCM_CD) && (diff & SERIAL_MSR_CD)) ||
 436                                     ((arg & TIOCM_CTS) && (diff & SERIAL_MSR_CTS)))
 437                                         return 0;
 438                         }
 439                 }
 440                 return 0;
 441
 442         default:
 443                 break;
 444         }
 445
 446         dbg("%s arg not supported", __func__);
 447
 448         return -ENOIOCTLCMD;
 449 }
 450
 451 static void ssu100_set_max_packet_size(struct usb_serial_port *port)
 452 {
 453         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 454         struct usb_serial *serial = port->serial;
 455         struct usb_device *udev = serial->dev;
 456
 457         struct usb_interface *interface = serial->interface;
 458         struct usb_endpoint_descriptor *ep_desc = &interface->cur_altsetting->endpoint[1].desc;
 459
 460         unsigned num_endpoints;
 461         int i;
 462         unsigned long flags;
 463
 464         num_endpoints = interface->cur_altsetting->desc.bNumEndpoints;
 465         dev_info(&udev->dev, "Number of endpoints %d\n", num_endpoints);
 466
 467         for (i = 0; i < num_endpoints; i++) {
 468                 dev_info(&udev->dev, "Endpoint %d MaxPacketSize %d\n", i+1,
 469                         interface->cur_altsetting->endpoint[i].desc.wMaxPacketSize);
 470                 ep_desc = &interface->cur_altsetting->endpoint[i].desc;
 471         }
 472
 473         /* set max packet size based on descriptor */
 474         spin_lock_irqsave(&priv->status_lock, flags);
 475         priv->max_packet_size = ep_desc->wMaxPacketSize;
 476         spin_unlock_irqrestore(&priv->status_lock, flags);
 477
 478         dev_info(&udev->dev, "Setting MaxPacketSize %d\n", priv->max_packet_size);
 479 }
 480
 481 static int ssu100_attach(struct usb_serial *serial)
 482 {
 483         struct ssu100_port_private *priv;
 484         struct usb_serial_port *port = *serial->port;
 485
 486         dbg("%s", __func__);
 487
 488         priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 489         if (!priv) {
 490                 dev_err(&port->dev, "%s- kmalloc(%Zd) failed.\n", __func__,
 491                         sizeof(*priv));
 492                 return -ENOMEM;
 493         }
 494
 495         spin_lock_init(&priv->status_lock);
 496         init_waitqueue_head(&priv->delta_msr_wait);
 497         usb_set_serial_port_data(port, priv);
 498         ssu100_set_max_packet_size(port);
 499
 500         return ssu100_initdevice(serial->dev);
 501 }
 502
 503 static int ssu100_tiocmget(struct tty_struct *tty, struct file *file)
 504 {
 505         struct usb_serial_port *port = tty->driver_data;
 506         struct usb_device *dev = port->serial->dev;
 507         u8 *d;
 508         int r;
 509
 510         dbg("%s\n", __func__);
 511
 512         d = kzalloc(2, GFP_KERNEL);
 513         if (!d)
 514                 return -ENOMEM;
 515
 516         r = ssu100_getregister(dev, 0, MODEM_CTL_REGISTER, d);
 517         if (r < 0)
 518                 goto mget_out;
 519
 520         r = ssu100_getregister(dev, 0, MODEM_STATUS_REGISTER, d+1);
 521         if (r < 0)
 522                 goto mget_out;
 523
 524         r = (d[0] & SERIAL_MCR_DTR ? TIOCM_DTR : 0) |
 525                 (d[0] & SERIAL_MCR_RTS ? TIOCM_RTS : 0) |
 526                 (d[1] & SERIAL_MSR_CTS ? TIOCM_CTS : 0) |
 527                 (d[1] & SERIAL_MSR_CD ? TIOCM_CAR : 0) |
 528                 (d[1] & SERIAL_MSR_RI ? TIOCM_RI : 0) |
 529                 (d[1] & SERIAL_MSR_DSR ? TIOCM_DSR : 0);
 530
 531 mget_out:
 532         kfree(d);
 533         return r;
 534 }
 535
 536 static int ssu100_tiocmset(struct tty_struct *tty, struct file *file,
 537                            unsigned int set, unsigned int clear)
 538 {
 539         struct usb_serial_port *port = tty->driver_data;
 540         struct usb_device *dev = port->serial->dev;
 541
 542         dbg("%s\n", __func__);
 543         return update_mctrl(dev, set, clear);
 544 }
 545
 546 static void ssu100_dtr_rts(struct usb_serial_port *port, int on)
 547 {
 548         struct usb_device *dev = port->serial->dev;
 549
 550         dbg("%s\n", __func__);
 551
 552         mutex_lock(&port->serial->disc_mutex);
 553         if (!port->serial->disconnected) {
 554                 /* Disable flow control */
 555                 if (!on &&
 556                     ssu100_setregister(dev, 0, 0) < 0)
 557                         dev_err(&port->dev, "error from flowcontrol urb\n");
 558                 /* drop RTS and DTR */
 559                 if (on)
 560                         set_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 561                 else
 562                         clear_mctrl(dev, TIOCM_DTR | TIOCM_RTS);
 563         }
 564         mutex_unlock(&port->serial->disc_mutex);
 565 }
 566
 567 static int ssu100_process_packet(struct tty_struct *tty,
 568                                  struct usb_serial_port *port,
 569                                  struct ssu100_port_private *priv,
 570                                  char *packet, int len)
 571 {
 572         int i;
 573         char flag;
 574         char *ch;
 575
 576         dbg("%s - port %d", __func__, port->number);
 577
 578         if (len < 4) {
 579                 dbg("%s - malformed packet", __func__);
 580                 return 0;
 581         }
 582
 583         if ((packet[0] == 0x1b) && (packet[1] == 0x1b) &&
 584             ((packet[2] == 0x00) || (packet[2] == 0x01))) {
 585                 if (packet[2] == 0x00)
 586                         priv->shadowLSR = packet[3] & (SERIAL_LSR_OE |
 587                                                        SERIAL_LSR_PE |
 588                                                        SERIAL_LSR_FE |
 589                                                        SERIAL_LSR_BI);
 590
 591                 if (packet[2] == 0x01) {
 592                         priv->shadowMSR = packet[3];
 593                         wake_up_interruptible(&priv->delta_msr_wait);
 594                 }
 595
 596                 len -= 4;
 597                 ch = packet + 4;
 598         } else
 599                 ch = packet;
 600
 601         if (!len)
 602                 return 0;       /* status only */
 603
 604         if (port->port.console && port->sysrq) {
 605                 for (i = 0; i < len; i++, ch++) {
 606                         if (!usb_serial_handle_sysrq_char(tty, port, *ch))
 607                                 tty_insert_flip_char(tty, *ch, flag);
 608                 }
 609         } else
 610                 tty_insert_flip_string_fixed_flag(tty, ch, flag, len);
 611
 612         return len;
 613 }
 614
 615 static void ssu100_process_read_urb(struct urb *urb)
 616 {
 617         struct usb_serial_port *port = urb->context;
 618         struct ssu100_port_private *priv = usb_get_serial_port_data(port);
 619         char *data = (char *)urb->transfer_buffer;
 620         struct tty_struct *tty;
 621         int count = 0;
 622         int i;
 623         int len;
 624
 625         dbg("%s", __func__);
 626
 627         tty = tty_port_tty_get(&port->port);
 628         if (!tty)
 629                 return;
 630
 631         for (i = 0; i < urb->actual_length; i += priv->max_packet_size) {
 632                 len = min_t(int, urb->actual_length - i, priv->max_packet_size);
 633                 count += ssu100_process_packet(tty, port, priv, &data[i], len);
 634         }
 635
 636         if (count)
 637                 tty_flip_buffer_push(tty);
 638         tty_kref_put(tty);
 639 }
 640
 641
 642 static struct usb_serial_driver ssu100_device = {
 643         .driver = {
 644                 .owner = THIS_MODULE,
 645                 .name = "ssu100",
 646         },
 647         .description         = DRIVER_DESC,
 648         .id_table            = id_table,
 649         .usb_driver          = &ssu100_driver,
 650         .num_ports           = 1,
 651         .bulk_in_size        = 256,
 652         .bulk_out_size       = 256,
 653         .open                = ssu100_open,
 654         .close               = ssu100_close,
 655         .attach              = ssu100_attach,
 656         .release             = ssu100_release,
 657         .dtr_rts             = ssu100_dtr_rts,
 658         .process_read_urb    = ssu100_process_read_urb,
 659         .tiocmget            = ssu100_tiocmget,
 660         .tiocmset            = ssu100_tiocmset,
 661         .ioctl               = ssu100_ioctl,
 662         .set_termios         = ssu100_set_termios,
 663 };
 664
 665 static int __init ssu100_init(void)
 666 {
 667         int retval;
 668
 669         dbg("%s", __func__);
 670
 671         /* register with usb-serial */
 672         retval = usb_serial_register(&ssu100_device);
 673
 674         if (retval)
 675                 goto failed_usb_sio_register;
 676
 677         retval = usb_register(&ssu100_driver);
 678         if (retval)
 679                 goto failed_usb_register;
 680
 681         printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 682                DRIVER_DESC "\n");
 683
 684         return 0;
 685
 686 failed_usb_register:
 687         usb_serial_deregister(&ssu100_device);
 688 failed_usb_sio_register:
 689         return retval;
 690 }
 691
 692 static void __exit ssu100_exit(void)
 693 {
 694         usb_deregister(&ssu100_driver);
 695         usb_serial_deregister(&ssu100_device);
 696 }
 697
 698 module_init(ssu100_init);
 699 module_exit(ssu100_exit);
 700
 701 MODULE_DESCRIPTION(DRIVER_DESC);
 702 MODULE_LICENSE("GPL");
 703
 704 module_param(debug, bool, S_IRUGO | S_IWUSR);
 705 MODULE_PARM_DESC(debug, "Debug enabled or not");