drivers/usb/serial/kobil_sct.c

   1 /*
   2  *  KOBIL USB Smart Card Terminal Driver
   3  *
   4  *  Copyright (C) 2002  KOBIL Systems GmbH
   5  *  Author: Thomas Wahrenbruch
   6  *
   7  *  Contact: linuxusb@kobil.de
   8  *
   9  *  This program is largely derived from work by the linux-usb group
  10  *  and associated source files.  Please see the usb/serial files for
  11  *  individual credits and copyrights.
  12  *
  13  *  This program is free software; you can redistribute it and/or modify
  14  *  it under the terms of the GNU General Public License as published by
  15  *  the Free Software Foundation; either version 2 of the License, or
  16  *  (at your option) any later version.
  17  *
  18  *  Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
  19  *  patience.
  20  *
  21  * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
  22  * (Adapter K), B1 Professional and KAAN Professional (Adapter B)
  23  */
  24
  25
  26 #include <linux/kernel.h>
  27 #include <linux/errno.h>
  28 #include <linux/slab.h>
  29 #include <linux/tty.h>
  30 #include <linux/tty_driver.h>
  31 #include <linux/tty_flip.h>
  32 #include <linux/module.h>
  33 #include <linux/spinlock.h>
  34 #include <linux/uaccess.h>
  35 #include <linux/usb.h>
  36 #include <linux/usb/serial.h>
  37 #include <linux/ioctl.h>
  38 #include "kobil_sct.h"
  39
  40 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
  41 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
  42
  43 #define KOBIL_VENDOR_ID                 0x0D46
  44 #define KOBIL_ADAPTER_B_PRODUCT_ID      0x2011
  45 #define KOBIL_ADAPTER_K_PRODUCT_ID      0x2012
  46 #define KOBIL_USBTWIN_PRODUCT_ID        0x0078
  47 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
  48
  49 #define KOBIL_TIMEOUT           500
  50 #define KOBIL_BUF_LENGTH        300
  51
  52
  53 /* Function prototypes */
  54 static int kobil_port_probe(struct usb_serial_port *probe);
  55 static int kobil_port_remove(struct usb_serial_port *probe);
  56 static int  kobil_open(struct tty_struct *tty, struct usb_serial_port *port);
  57 static void kobil_close(struct usb_serial_port *port);
  58 static int  kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
  59                          const unsigned char *buf, int count);
  60 static int  kobil_write_room(struct tty_struct *tty);
  61 static int  kobil_ioctl(struct tty_struct *tty,
  62                         unsigned int cmd, unsigned long arg);
  63 static int  kobil_tiocmget(struct tty_struct *tty);
  64 static int  kobil_tiocmset(struct tty_struct *tty,
  65                            unsigned int set, unsigned int clear);
  66 static void kobil_read_int_callback(struct urb *urb);
  67 static void kobil_write_int_callback(struct urb *urb);
  68 static void kobil_set_termios(struct tty_struct *tty,
  69                         struct usb_serial_port *port, struct ktermios *old);
  70 static void kobil_init_termios(struct tty_struct *tty);
  71
  72 static const struct usb_device_id id_table[] = {
  73         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
  74         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
  75         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
  76         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
  77         { }                     /* Terminating entry */
  78 };
  79 MODULE_DEVICE_TABLE(usb, id_table);
  80
  81 static struct usb_serial_driver kobil_device = {
  82         .driver = {
  83                 .owner =        THIS_MODULE,
  84                 .name =         "kobil",
  85         },
  86         .description =          "KOBIL USB smart card terminal",
  87         .id_table =             id_table,
  88         .num_ports =            1,
  89         .port_probe =           kobil_port_probe,
  90         .port_remove =          kobil_port_remove,
  91         .ioctl =                kobil_ioctl,
  92         .set_termios =          kobil_set_termios,
  93         .init_termios =         kobil_init_termios,
  94         .tiocmget =             kobil_tiocmget,
  95         .tiocmset =             kobil_tiocmset,
  96         .open =                 kobil_open,
  97         .close =                kobil_close,
  98         .write =                kobil_write,
  99         .write_room =           kobil_write_room,
 100         .read_int_callback =    kobil_read_int_callback,
 101         .write_int_callback =   kobil_write_int_callback,
 102 };
 103
 104 static struct usb_serial_driver * const serial_drivers[] = {
 105         &kobil_device, NULL
 106 };
 107
 108 struct kobil_private {
 109         unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */
 110         int filled;  /* index of the last char in buf */
 111         int cur_pos; /* index of the next char to send in buf */
 112         __u16 device_type;
 113 };
 114
 115
 116 static int kobil_port_probe(struct usb_serial_port *port)
 117 {
 118         struct usb_serial *serial = port->serial;
 119         struct kobil_private *priv;
 120
 121         priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
 122         if (!priv)
 123                 return -ENOMEM;
 124
 125         priv->filled = 0;
 126         priv->cur_pos = 0;
 127         priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
 128
 129         switch (priv->device_type) {
 130         case KOBIL_ADAPTER_B_PRODUCT_ID:
 131                 dev_dbg(&serial->dev->dev, "KOBIL B1 PRO / KAAN PRO detected\n");
 132                 break;
 133         case KOBIL_ADAPTER_K_PRODUCT_ID:
 134                 dev_dbg(&serial->dev->dev, "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
 135                 break;
 136         case KOBIL_USBTWIN_PRODUCT_ID:
 137                 dev_dbg(&serial->dev->dev, "KOBIL USBTWIN detected\n");
 138                 break;
 139         case KOBIL_KAAN_SIM_PRODUCT_ID:
 140                 dev_dbg(&serial->dev->dev, "KOBIL KAAN SIM detected\n");
 141                 break;
 142         }
 143         usb_set_serial_port_data(port, priv);
 144
 145         return 0;
 146 }
 147
 148
 149 static int kobil_port_remove(struct usb_serial_port *port)
 150 {
 151         struct kobil_private *priv;
 152
 153         priv = usb_get_serial_port_data(port);
 154         kfree(priv);
 155
 156         return 0;
 157 }
 158
 159 static void kobil_init_termios(struct tty_struct *tty)
 160 {
 161         /* Default to echo off and other sane device settings */
 162         tty->termios.c_lflag = 0;
 163         tty->termios.c_iflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
 164         tty->termios.c_iflag |= IGNBRK | IGNPAR | IXOFF;
 165         /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */
 166         tty->termios.c_oflag &= ~ONLCR;
 167 }
 168
 169 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port)
 170 {
 171         struct device *dev = &port->dev;
 172         int result = 0;
 173         struct kobil_private *priv;
 174         unsigned char *transfer_buffer;
 175         int transfer_buffer_length = 8;
 176
 177         priv = usb_get_serial_port_data(port);
 178
 179         /* allocate memory for transfer buffer */
 180         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 181         if (!transfer_buffer)
 182                 return -ENOMEM;
 183
 184         /* get hardware version */
 185         result = usb_control_msg(port->serial->dev,
 186                           usb_rcvctrlpipe(port->serial->dev, 0),
 187                           SUSBCRequest_GetMisc,
 188                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 189                           SUSBCR_MSC_GetHWVersion,
 190                           0,
 191                           transfer_buffer,
 192                           transfer_buffer_length,
 193                           KOBIL_TIMEOUT
 194         );
 195         dev_dbg(dev, "%s - Send get_HW_version URB returns: %i\n", __func__, result);
 196         dev_dbg(dev, "Hardware version: %i.%i.%i\n", transfer_buffer[0],
 197                 transfer_buffer[1], transfer_buffer[2]);
 198
 199         /* get firmware version */
 200         result = usb_control_msg(port->serial->dev,
 201                           usb_rcvctrlpipe(port->serial->dev, 0),
 202                           SUSBCRequest_GetMisc,
 203                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 204                           SUSBCR_MSC_GetFWVersion,
 205                           0,
 206                           transfer_buffer,
 207                           transfer_buffer_length,
 208                           KOBIL_TIMEOUT
 209         );
 210         dev_dbg(dev, "%s - Send get_FW_version URB returns: %i\n", __func__, result);
 211         dev_dbg(dev, "Firmware version: %i.%i.%i\n", transfer_buffer[0],
 212                 transfer_buffer[1], transfer_buffer[2]);
 213
 214         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 215                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 216                 /* Setting Baudrate, Parity and Stopbits */
 217                 result = usb_control_msg(port->serial->dev,
 218                           usb_sndctrlpipe(port->serial->dev, 0),
 219                           SUSBCRequest_SetBaudRateParityAndStopBits,
 220                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 221                           SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
 222                                                         SUSBCR_SPASB_1StopBit,
 223                           0,
 224                           NULL,
 225                           0,
 226                           KOBIL_TIMEOUT
 227                 );
 228                 dev_dbg(dev, "%s - Send set_baudrate URB returns: %i\n", __func__, result);
 229
 230                 /* reset all queues */
 231                 result = usb_control_msg(port->serial->dev,
 232                           usb_sndctrlpipe(port->serial->dev, 0),
 233                           SUSBCRequest_Misc,
 234                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 235                           SUSBCR_MSC_ResetAllQueues,
 236                           0,
 237                           NULL,
 238                           0,
 239                           KOBIL_TIMEOUT
 240                 );
 241                 dev_dbg(dev, "%s - Send reset_all_queues URB returns: %i\n", __func__, result);
 242         }
 243         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 244             priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 245             priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 246                 /* start reading (Adapter B 'cause PNP string) */
 247                 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 248                 dev_dbg(dev, "%s - Send read URB returns: %i\n", __func__, result);
 249         }
 250
 251         kfree(transfer_buffer);
 252         return 0;
 253 }
 254
 255
 256 static void kobil_close(struct usb_serial_port *port)
 257 {
 258         /* FIXME: Add rts/dtr methods */
 259         usb_kill_urb(port->interrupt_out_urb);
 260         usb_kill_urb(port->interrupt_in_urb);
 261 }
 262
 263
 264 static void kobil_read_int_callback(struct urb *urb)
 265 {
 266         int result;
 267         struct usb_serial_port *port = urb->context;
 268         unsigned char *data = urb->transfer_buffer;
 269         int status = urb->status;
 270
 271         if (status) {
 272                 dev_dbg(&port->dev, "%s - Read int status not zero: %d\n", __func__, status);
 273                 return;
 274         }
 275
 276         if (urb->actual_length) {
 277                 usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
 278                                                                         data);
 279                 tty_insert_flip_string(&port->port, data, urb->actual_length);
 280                 tty_flip_buffer_push(&port->port);
 281         }
 282
 283         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 284         dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
 285 }
 286
 287
 288 static void kobil_write_int_callback(struct urb *urb)
 289 {
 290 }
 291
 292
 293 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
 294                         const unsigned char *buf, int count)
 295 {
 296         int length = 0;
 297         int result = 0;
 298         int todo = 0;
 299         struct kobil_private *priv;
 300
 301         if (count == 0) {
 302                 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
 303                 return 0;
 304         }
 305
 306         priv = usb_get_serial_port_data(port);
 307
 308         if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
 309                 dev_dbg(&port->dev, "%s - Error: write request bigger than buffer size\n", __func__);
 310                 return -ENOMEM;
 311         }
 312
 313         /* Copy data to buffer */
 314         memcpy(priv->buf + priv->filled, buf, count);
 315         usb_serial_debug_data(&port->dev, __func__, count, priv->buf + priv->filled);
 316         priv->filled = priv->filled + count;
 317
 318         /* only send complete block. TWIN, KAAN SIM and adapter K
 319            use the same protocol. */
 320         if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
 321              ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) {
 322                 /* stop reading (except TWIN and KAAN SIM) */
 323                 if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID)
 324                         || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID))
 325                         usb_kill_urb(port->interrupt_in_urb);
 326
 327                 todo = priv->filled - priv->cur_pos;
 328
 329                 while (todo > 0) {
 330                         /* max 8 byte in one urb (endpoint size) */
 331                         length = min(todo, port->interrupt_out_size);
 332                         /* copy data to transfer buffer */
 333                         memcpy(port->interrupt_out_buffer,
 334                                         priv->buf + priv->cur_pos, length);
 335                         port->interrupt_out_urb->transfer_buffer_length = length;
 336
 337                         priv->cur_pos = priv->cur_pos + length;
 338                         result = usb_submit_urb(port->interrupt_out_urb, GFP_NOIO);
 339                         dev_dbg(&port->dev, "%s - Send write URB returns: %i\n", __func__, result);
 340                         todo = priv->filled - priv->cur_pos;
 341
 342                         if (todo > 0)
 343                                 msleep(24);
 344                 }
 345
 346                 priv->filled = 0;
 347                 priv->cur_pos = 0;
 348
 349                 /* start reading (except TWIN and KAAN SIM) */
 350                 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 351                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 352                         result = usb_submit_urb(port->interrupt_in_urb,
 353                                                                 GFP_NOIO);
 354                         dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
 355                 }
 356         }
 357         return count;
 358 }
 359
 360
 361 static int kobil_write_room(struct tty_struct *tty)
 362 {
 363         /* FIXME */
 364         return 8;
 365 }
 366
 367
 368 static int kobil_tiocmget(struct tty_struct *tty)
 369 {
 370         struct usb_serial_port *port = tty->driver_data;
 371         struct kobil_private *priv;
 372         int result;
 373         unsigned char *transfer_buffer;
 374         int transfer_buffer_length = 8;
 375
 376         priv = usb_get_serial_port_data(port);
 377         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 378                         || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 379                 /* This device doesn't support ioctl calls */
 380                 return -EINVAL;
 381         }
 382
 383         /* allocate memory for transfer buffer */
 384         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 385         if (!transfer_buffer)
 386                 return -ENOMEM;
 387
 388         result = usb_control_msg(port->serial->dev,
 389                           usb_rcvctrlpipe(port->serial->dev, 0),
 390                           SUSBCRequest_GetStatusLineState,
 391                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 392                           0,
 393                           0,
 394                           transfer_buffer,
 395                           transfer_buffer_length,
 396                           KOBIL_TIMEOUT);
 397
 398         dev_dbg(&port->dev, "%s - Send get_status_line_state URB returns: %i. Statusline: %02x\n",
 399                 __func__, result, transfer_buffer[0]);
 400
 401         result = 0;
 402         if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0)
 403                 result = TIOCM_DSR;
 404         kfree(transfer_buffer);
 405         return result;
 406 }
 407
 408 static int kobil_tiocmset(struct tty_struct *tty,
 409                            unsigned int set, unsigned int clear)
 410 {
 411         struct usb_serial_port *port = tty->driver_data;
 412         struct device *dev = &port->dev;
 413         struct kobil_private *priv;
 414         int result;
 415         int dtr = 0;
 416         int rts = 0;
 417         unsigned char *transfer_buffer;
 418         int transfer_buffer_length = 8;
 419
 420         /* FIXME: locking ? */
 421         priv = usb_get_serial_port_data(port);
 422         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 423                 || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 424                 /* This device doesn't support ioctl calls */
 425                 return -EINVAL;
 426         }
 427
 428         /* allocate memory for transfer buffer */
 429         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 430         if (!transfer_buffer)
 431                 return -ENOMEM;
 432
 433         if (set & TIOCM_RTS)
 434                 rts = 1;
 435         if (set & TIOCM_DTR)
 436                 dtr = 1;
 437         if (clear & TIOCM_RTS)
 438                 rts = 0;
 439         if (clear & TIOCM_DTR)
 440                 dtr = 0;
 441
 442         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
 443                 if (dtr != 0)
 444                         dev_dbg(dev, "%s - Setting DTR\n", __func__);
 445                 else
 446                         dev_dbg(dev, "%s - Clearing DTR\n", __func__);
 447                 result = usb_control_msg(port->serial->dev,
 448                           usb_sndctrlpipe(port->serial->dev, 0),
 449                           SUSBCRequest_SetStatusLinesOrQueues,
 450                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 451                           ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
 452                           0,
 453                           NULL,
 454                           0,
 455                           KOBIL_TIMEOUT);
 456         } else {
 457                 if (rts != 0)
 458                         dev_dbg(dev, "%s - Setting RTS\n", __func__);
 459                 else
 460                         dev_dbg(dev, "%s - Clearing RTS\n", __func__);
 461                 result = usb_control_msg(port->serial->dev,
 462                         usb_sndctrlpipe(port->serial->dev, 0),
 463                         SUSBCRequest_SetStatusLinesOrQueues,
 464                         USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 465                         ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
 466                         0,
 467                         NULL,
 468                         0,
 469                         KOBIL_TIMEOUT);
 470         }
 471         dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result);
 472         kfree(transfer_buffer);
 473         return (result < 0) ? result : 0;
 474 }
 475
 476 static void kobil_set_termios(struct tty_struct *tty,
 477                         struct usb_serial_port *port, struct ktermios *old)
 478 {
 479         struct kobil_private *priv;
 480         int result;
 481         unsigned short urb_val = 0;
 482         int c_cflag = tty->termios.c_cflag;
 483         speed_t speed;
 484
 485         priv = usb_get_serial_port_data(port);
 486         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 487                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 488                 /* This device doesn't support ioctl calls */
 489                 tty_termios_copy_hw(&tty->termios, old);
 490                 return;
 491         }
 492
 493         speed = tty_get_baud_rate(tty);
 494         switch (speed) {
 495         case 1200:
 496                 urb_val = SUSBCR_SBR_1200;
 497                 break;
 498         default:
 499                 speed = 9600;
 500         case 9600:
 501                 urb_val = SUSBCR_SBR_9600;
 502                 break;
 503         }
 504         urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits :
 505                                                         SUSBCR_SPASB_1StopBit;
 506         if (c_cflag & PARENB) {
 507                 if  (c_cflag & PARODD)
 508                         urb_val |= SUSBCR_SPASB_OddParity;
 509                 else
 510                         urb_val |= SUSBCR_SPASB_EvenParity;
 511         } else
 512                 urb_val |= SUSBCR_SPASB_NoParity;
 513         tty->termios.c_cflag &= ~CMSPAR;
 514         tty_encode_baud_rate(tty, speed, speed);
 515
 516         result = usb_control_msg(port->serial->dev,
 517                   usb_sndctrlpipe(port->serial->dev, 0),
 518                   SUSBCRequest_SetBaudRateParityAndStopBits,
 519                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 520                   urb_val,
 521                   0,
 522                   NULL,
 523                   0,
 524                   KOBIL_TIMEOUT
 525                 );
 526 }
 527
 528 static int kobil_ioctl(struct tty_struct *tty,
 529                                         unsigned int cmd, unsigned long arg)
 530 {
 531         struct usb_serial_port *port = tty->driver_data;
 532         struct kobil_private *priv = usb_get_serial_port_data(port);
 533         unsigned char *transfer_buffer;
 534         int transfer_buffer_length = 8;
 535         int result;
 536
 537         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 538                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)
 539                 /* This device doesn't support ioctl calls */
 540                 return -ENOIOCTLCMD;
 541
 542         switch (cmd) {
 543         case TCFLSH:
 544                 transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
 545                 if (!transfer_buffer)
 546                         return -ENOBUFS;
 547
 548                 result = usb_control_msg(port->serial->dev,
 549                           usb_sndctrlpipe(port->serial->dev, 0),
 550                           SUSBCRequest_Misc,
 551                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 552                           SUSBCR_MSC_ResetAllQueues,
 553                           0,
 554                           NULL,
 555                           0,
 556                           KOBIL_TIMEOUT
 557                         );
 558
 559                 dev_dbg(&port->dev,
 560                         "%s - Send reset_all_queues (FLUSH) URB returns: %i\n",
 561                         __func__, result);
 562                 kfree(transfer_buffer);
 563                 return (result < 0) ? -EIO: 0;
 564         default:
 565                 return -ENOIOCTLCMD;
 566         }
 567 }
 568
 569 module_usb_serial_driver(serial_drivers, id_table);
 570
 571 MODULE_AUTHOR(DRIVER_AUTHOR);
 572 MODULE_DESCRIPTION(DRIVER_DESC);
 573 MODULE_LICENSE("GPL");