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/init.h>
  29 #include <linux/slab.h>
  30 #include <linux/tty.h>
  31 #include <linux/tty_driver.h>
  32 #include <linux/tty_flip.h>
  33 #include <linux/module.h>
  34 #include <linux/spinlock.h>
  35 #include <linux/uaccess.h>
  36 #include <linux/usb.h>
  37 #include <linux/usb/serial.h>
  38 #include <linux/ioctl.h>
  39 #include "kobil_sct.h"
  40
  41 static bool debug;
  42
  43 /* Version Information */
  44 #define DRIVER_VERSION "21/05/2004"
  45 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
  46 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
  47
  48 #define KOBIL_VENDOR_ID                 0x0D46
  49 #define KOBIL_ADAPTER_B_PRODUCT_ID      0x2011
  50 #define KOBIL_ADAPTER_K_PRODUCT_ID      0x2012
  51 #define KOBIL_USBTWIN_PRODUCT_ID        0x0078
  52 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
  53
  54 #define KOBIL_TIMEOUT           500
  55 #define KOBIL_BUF_LENGTH        300
  56
  57
  58 /* Function prototypes */
  59 static int  kobil_startup(struct usb_serial *serial);
  60 static void kobil_release(struct usb_serial *serial);
  61 static int  kobil_open(struct tty_struct *tty, struct usb_serial_port *port);
  62 static void kobil_close(struct usb_serial_port *port);
  63 static int  kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
  64                          const unsigned char *buf, int count);
  65 static int  kobil_write_room(struct tty_struct *tty);
  66 static int  kobil_ioctl(struct tty_struct *tty,
  67                         unsigned int cmd, unsigned long arg);
  68 static int  kobil_tiocmget(struct tty_struct *tty);
  69 static int  kobil_tiocmset(struct tty_struct *tty,
  70                            unsigned int set, unsigned int clear);
  71 static void kobil_read_int_callback(struct urb *urb);
  72 static void kobil_write_callback(struct urb *purb);
  73 static void kobil_set_termios(struct tty_struct *tty,
  74                         struct usb_serial_port *port, struct ktermios *old);
  75 static void kobil_init_termios(struct tty_struct *tty);
  76
  77 static const struct usb_device_id id_table[] = {
  78         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
  79         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
  80         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
  81         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
  82         { }                     /* Terminating entry */
  83 };
  84
  85
  86 MODULE_DEVICE_TABLE(usb, id_table);
  87
  88 static struct usb_driver kobil_driver = {
  89         .name =         "kobil",
  90         .id_table =     id_table,
  91 };
  92
  93
  94 static struct usb_serial_driver kobil_device = {
  95         .driver = {
  96                 .owner =        THIS_MODULE,
  97                 .name =         "kobil",
  98         },
  99         .description =          "KOBIL USB smart card terminal",
 100         .id_table =             id_table,
 101         .num_ports =            1,
 102         .attach =               kobil_startup,
 103         .release =              kobil_release,
 104         .ioctl =                kobil_ioctl,
 105         .set_termios =          kobil_set_termios,
 106         .init_termios =         kobil_init_termios,
 107         .tiocmget =             kobil_tiocmget,
 108         .tiocmset =             kobil_tiocmset,
 109         .open =                 kobil_open,
 110         .close =                kobil_close,
 111         .write =                kobil_write,
 112         .write_room =           kobil_write_room,
 113         .read_int_callback =    kobil_read_int_callback,
 114 };
 115
 116 static struct usb_serial_driver * const serial_drivers[] = {
 117         &kobil_device, NULL
 118 };
 119
 120 struct kobil_private {
 121         int write_int_endpoint_address;
 122         int read_int_endpoint_address;
 123         unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */
 124         int filled;  /* index of the last char in buf */
 125         int cur_pos; /* index of the next char to send in buf */
 126         __u16 device_type;
 127 };
 128
 129
 130 static int kobil_startup(struct usb_serial *serial)
 131 {
 132         int i;
 133         struct kobil_private *priv;
 134         struct usb_device *pdev;
 135         struct usb_host_config *actconfig;
 136         struct usb_interface *interface;
 137         struct usb_host_interface *altsetting;
 138         struct usb_host_endpoint *endpoint;
 139
 140         priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
 141         if (!priv)
 142                 return -ENOMEM;
 143
 144         priv->filled = 0;
 145         priv->cur_pos = 0;
 146         priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
 147
 148         switch (priv->device_type) {
 149         case KOBIL_ADAPTER_B_PRODUCT_ID:
 150                 printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
 151                 break;
 152         case KOBIL_ADAPTER_K_PRODUCT_ID:
 153                 printk(KERN_DEBUG
 154                   "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
 155                 break;
 156         case KOBIL_USBTWIN_PRODUCT_ID:
 157                 printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
 158                 break;
 159         case KOBIL_KAAN_SIM_PRODUCT_ID:
 160                 printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
 161                 break;
 162         }
 163         usb_set_serial_port_data(serial->port[0], priv);
 164
 165         /* search for the necessary endpoints */
 166         pdev = serial->dev;
 167         actconfig = pdev->actconfig;
 168         interface = actconfig->interface[0];
 169         altsetting = interface->cur_altsetting;
 170         endpoint = altsetting->endpoint;
 171
 172         for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
 173                 endpoint = &altsetting->endpoint[i];
 174                 if (usb_endpoint_is_int_out(&endpoint->desc)) {
 175                         dbg("%s Found interrupt out endpoint. Address: %d",
 176                                 __func__, endpoint->desc.bEndpointAddress);
 177                         priv->write_int_endpoint_address =
 178                                 endpoint->desc.bEndpointAddress;
 179                 }
 180                 if (usb_endpoint_is_int_in(&endpoint->desc)) {
 181                         dbg("%s Found interrupt in  endpoint. Address: %d",
 182                                 __func__, endpoint->desc.bEndpointAddress);
 183                         priv->read_int_endpoint_address =
 184                                 endpoint->desc.bEndpointAddress;
 185                 }
 186         }
 187         return 0;
 188 }
 189
 190
 191 static void kobil_release(struct usb_serial *serial)
 192 {
 193         int i;
 194
 195         for (i = 0; i < serial->num_ports; ++i)
 196                 kfree(usb_get_serial_port_data(serial->port[i]));
 197 }
 198
 199 static void kobil_init_termios(struct tty_struct *tty)
 200 {
 201         /* Default to echo off and other sane device settings */
 202         tty->termios->c_lflag = 0;
 203         tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
 204         tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
 205         /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */
 206         tty->termios->c_oflag &= ~ONLCR;
 207 }
 208
 209 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port)
 210 {
 211         int result = 0;
 212         struct kobil_private *priv;
 213         unsigned char *transfer_buffer;
 214         int transfer_buffer_length = 8;
 215         int write_urb_transfer_buffer_length = 8;
 216
 217         priv = usb_get_serial_port_data(port);
 218
 219         /* allocate memory for transfer buffer */
 220         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 221         if (!transfer_buffer)
 222                 return -ENOMEM;
 223
 224         /* allocate write_urb */
 225         if (!port->write_urb) {
 226                 dbg("%s - port %d  Allocating port->write_urb",
 227                                                 __func__, port->number);
 228                 port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 229                 if (!port->write_urb) {
 230                         dbg("%s - port %d usb_alloc_urb failed",
 231                                                 __func__, port->number);
 232                         kfree(transfer_buffer);
 233                         return -ENOMEM;
 234                 }
 235         }
 236
 237         /* allocate memory for write_urb transfer buffer */
 238         port->write_urb->transfer_buffer =
 239                         kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
 240         if (!port->write_urb->transfer_buffer) {
 241                 kfree(transfer_buffer);
 242                 usb_free_urb(port->write_urb);
 243                 port->write_urb = NULL;
 244                 return -ENOMEM;
 245         }
 246
 247         /* get hardware version */
 248         result = usb_control_msg(port->serial->dev,
 249                           usb_rcvctrlpipe(port->serial->dev, 0),
 250                           SUSBCRequest_GetMisc,
 251                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 252                           SUSBCR_MSC_GetHWVersion,
 253                           0,
 254                           transfer_buffer,
 255                           transfer_buffer_length,
 256                           KOBIL_TIMEOUT
 257         );
 258         dbg("%s - port %d Send get_HW_version URB returns: %i",
 259                 __func__, port->number, result);
 260         dbg("Harware version: %i.%i.%i",
 261                 transfer_buffer[0], transfer_buffer[1], transfer_buffer[2]);
 262
 263         /* get firmware version */
 264         result = usb_control_msg(port->serial->dev,
 265                           usb_rcvctrlpipe(port->serial->dev, 0),
 266                           SUSBCRequest_GetMisc,
 267                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 268                           SUSBCR_MSC_GetFWVersion,
 269                           0,
 270                           transfer_buffer,
 271                           transfer_buffer_length,
 272                           KOBIL_TIMEOUT
 273         );
 274         dbg("%s - port %d Send get_FW_version URB returns: %i",
 275                                         __func__, port->number, result);
 276         dbg("Firmware version: %i.%i.%i",
 277                 transfer_buffer[0], transfer_buffer[1], transfer_buffer[2]);
 278
 279         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 280                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 281                 /* Setting Baudrate, Parity and Stopbits */
 282                 result = usb_control_msg(port->serial->dev,
 283                           usb_rcvctrlpipe(port->serial->dev, 0),
 284                           SUSBCRequest_SetBaudRateParityAndStopBits,
 285                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 286                           SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
 287                                                         SUSBCR_SPASB_1StopBit,
 288                           0,
 289                           transfer_buffer,
 290                           0,
 291                           KOBIL_TIMEOUT
 292                 );
 293                 dbg("%s - port %d Send set_baudrate URB returns: %i",
 294                                         __func__, port->number, result);
 295
 296                 /* reset all queues */
 297                 result = usb_control_msg(port->serial->dev,
 298                           usb_rcvctrlpipe(port->serial->dev, 0),
 299                           SUSBCRequest_Misc,
 300                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 301                           SUSBCR_MSC_ResetAllQueues,
 302                           0,
 303                           transfer_buffer,
 304                           0,
 305                           KOBIL_TIMEOUT
 306                 );
 307                 dbg("%s - port %d Send reset_all_queues URB returns: %i",
 308                                         __func__, port->number, result);
 309         }
 310         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 311             priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 312             priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 313                 /* start reading (Adapter B 'cause PNP string) */
 314                 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 315                 dbg("%s - port %d Send read URB returns: %i",
 316                                         __func__, port->number, result);
 317         }
 318
 319         kfree(transfer_buffer);
 320         return 0;
 321 }
 322
 323
 324 static void kobil_close(struct usb_serial_port *port)
 325 {
 326         /* FIXME: Add rts/dtr methods */
 327         if (port->write_urb) {
 328                 usb_poison_urb(port->write_urb);
 329                 kfree(port->write_urb->transfer_buffer);
 330                 usb_free_urb(port->write_urb);
 331                 port->write_urb = NULL;
 332         }
 333         usb_kill_urb(port->interrupt_in_urb);
 334 }
 335
 336
 337 static void kobil_read_int_callback(struct urb *urb)
 338 {
 339         int result;
 340         struct usb_serial_port *port = urb->context;
 341         struct tty_struct *tty;
 342         unsigned char *data = urb->transfer_buffer;
 343         int status = urb->status;
 344 /*      char *dbg_data; */
 345
 346         if (status) {
 347                 dbg("%s - port %d Read int status not zero: %d",
 348                     __func__, port->number, status);
 349                 return;
 350         }
 351
 352         tty = tty_port_tty_get(&port->port);
 353         if (tty && urb->actual_length) {
 354
 355                 /* BEGIN DEBUG */
 356                 /*
 357                   dbg_data = kzalloc((3 *  purb->actual_length + 10)
 358                                                 * sizeof(char), GFP_KERNEL);
 359                   if (! dbg_data) {
 360                           return;
 361                   }
 362                   for (i = 0; i < purb->actual_length; i++) {
 363                           sprintf(dbg_data +3*i, "%02X ", data[i]);
 364                   }
 365                   dbg(" <-- %s", dbg_data);
 366                   kfree(dbg_data);
 367                 */
 368                 /* END DEBUG */
 369
 370                 tty_insert_flip_string(tty, data, urb->actual_length);
 371                 tty_flip_buffer_push(tty);
 372         }
 373         tty_kref_put(tty);
 374
 375         result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
 376         dbg("%s - port %d Send read URB returns: %i",
 377                         __func__, port->number, result);
 378 }
 379
 380
 381 static void kobil_write_callback(struct urb *purb)
 382 {
 383 }
 384
 385
 386 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
 387                         const unsigned char *buf, int count)
 388 {
 389         int length = 0;
 390         int result = 0;
 391         int todo = 0;
 392         struct kobil_private *priv;
 393
 394         if (count == 0) {
 395                 dbg("%s - port %d write request of 0 bytes",
 396                                                 __func__, port->number);
 397                 return 0;
 398         }
 399
 400         priv = usb_get_serial_port_data(port);
 401
 402         if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
 403                 dbg("%s - port %d Error: write request bigger than buffer size", __func__, port->number);
 404                 return -ENOMEM;
 405         }
 406
 407         /* Copy data to buffer */
 408         memcpy(priv->buf + priv->filled, buf, count);
 409         usb_serial_debug_data(debug, &port->dev, __func__, count,
 410                                                 priv->buf + priv->filled);
 411         priv->filled = priv->filled + count;
 412
 413         /* only send complete block. TWIN, KAAN SIM and adapter K
 414            use the same protocol. */
 415         if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
 416              ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) {
 417                 /* stop reading (except TWIN and KAAN SIM) */
 418                 if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID)
 419                         || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID))
 420                         usb_kill_urb(port->interrupt_in_urb);
 421
 422                 todo = priv->filled - priv->cur_pos;
 423
 424                 while (todo > 0) {
 425                         /* max 8 byte in one urb (endpoint size) */
 426                         length = (todo < 8) ? todo : 8;
 427                         /* copy data to transfer buffer */
 428                         memcpy(port->write_urb->transfer_buffer,
 429                                         priv->buf + priv->cur_pos, length);
 430                         usb_fill_int_urb(port->write_urb,
 431                                   port->serial->dev,
 432                                   usb_sndintpipe(port->serial->dev,
 433                                         priv->write_int_endpoint_address),
 434                                   port->write_urb->transfer_buffer,
 435                                   length,
 436                                   kobil_write_callback,
 437                                   port,
 438                                   8
 439                         );
 440
 441                         priv->cur_pos = priv->cur_pos + length;
 442                         result = usb_submit_urb(port->write_urb, GFP_NOIO);
 443                         dbg("%s - port %d Send write URB returns: %i",
 444                                         __func__, port->number, result);
 445                         todo = priv->filled - priv->cur_pos;
 446
 447                         if (todo > 0)
 448                                 msleep(24);
 449                 }
 450
 451                 priv->filled = 0;
 452                 priv->cur_pos = 0;
 453
 454                 /* start reading (except TWIN and KAAN SIM) */
 455                 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 456                         priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 457                         result = usb_submit_urb(port->interrupt_in_urb,
 458                                                                 GFP_NOIO);
 459                         dbg("%s - port %d Send read URB returns: %i",
 460                                         __func__, port->number, result);
 461                 }
 462         }
 463         return count;
 464 }
 465
 466
 467 static int kobil_write_room(struct tty_struct *tty)
 468 {
 469         /* FIXME */
 470         return 8;
 471 }
 472
 473
 474 static int kobil_tiocmget(struct tty_struct *tty)
 475 {
 476         struct usb_serial_port *port = tty->driver_data;
 477         struct kobil_private *priv;
 478         int result;
 479         unsigned char *transfer_buffer;
 480         int transfer_buffer_length = 8;
 481
 482         priv = usb_get_serial_port_data(port);
 483         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 484                         || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 485                 /* This device doesn't support ioctl calls */
 486                 return -EINVAL;
 487         }
 488
 489         /* allocate memory for transfer buffer */
 490         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 491         if (!transfer_buffer)
 492                 return -ENOMEM;
 493
 494         result = usb_control_msg(port->serial->dev,
 495                           usb_rcvctrlpipe(port->serial->dev, 0),
 496                           SUSBCRequest_GetStatusLineState,
 497                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 498                           0,
 499                           0,
 500                           transfer_buffer,
 501                           transfer_buffer_length,
 502                           KOBIL_TIMEOUT);
 503
 504         dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x",
 505             __func__, port->number, result, transfer_buffer[0]);
 506
 507         result = 0;
 508         if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0)
 509                 result = TIOCM_DSR;
 510         kfree(transfer_buffer);
 511         return result;
 512 }
 513
 514 static int kobil_tiocmset(struct tty_struct *tty,
 515                            unsigned int set, unsigned int clear)
 516 {
 517         struct usb_serial_port *port = tty->driver_data;
 518         struct kobil_private *priv;
 519         int result;
 520         int dtr = 0;
 521         int rts = 0;
 522         unsigned char *transfer_buffer;
 523         int transfer_buffer_length = 8;
 524
 525         /* FIXME: locking ? */
 526         priv = usb_get_serial_port_data(port);
 527         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
 528                 || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 529                 /* This device doesn't support ioctl calls */
 530                 return -EINVAL;
 531         }
 532
 533         /* allocate memory for transfer buffer */
 534         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 535         if (!transfer_buffer)
 536                 return -ENOMEM;
 537
 538         if (set & TIOCM_RTS)
 539                 rts = 1;
 540         if (set & TIOCM_DTR)
 541                 dtr = 1;
 542         if (clear & TIOCM_RTS)
 543                 rts = 0;
 544         if (clear & TIOCM_DTR)
 545                 dtr = 0;
 546
 547         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
 548                 if (dtr != 0)
 549                         dbg("%s - port %d Setting DTR",
 550                                                 __func__, port->number);
 551                 else
 552                         dbg("%s - port %d Clearing DTR",
 553                                                 __func__, port->number);
 554                 result = usb_control_msg(port->serial->dev,
 555                           usb_rcvctrlpipe(port->serial->dev, 0),
 556                           SUSBCRequest_SetStatusLinesOrQueues,
 557                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 558                           ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
 559                           0,
 560                           transfer_buffer,
 561                           0,
 562                           KOBIL_TIMEOUT);
 563         } else {
 564                 if (rts != 0)
 565                         dbg("%s - port %d Setting RTS",
 566                                                 __func__, port->number);
 567                 else
 568                         dbg("%s - port %d Clearing RTS",
 569                                                 __func__, port->number);
 570                 result = usb_control_msg(port->serial->dev,
 571                         usb_rcvctrlpipe(port->serial->dev, 0),
 572                         SUSBCRequest_SetStatusLinesOrQueues,
 573                         USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 574                         ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
 575                         0,
 576                         transfer_buffer,
 577                         0,
 578                         KOBIL_TIMEOUT);
 579         }
 580         dbg("%s - port %d Send set_status_line URB returns: %i",
 581                                         __func__, port->number, result);
 582         kfree(transfer_buffer);
 583         return (result < 0) ? result : 0;
 584 }
 585
 586 static void kobil_set_termios(struct tty_struct *tty,
 587                         struct usb_serial_port *port, struct ktermios *old)
 588 {
 589         struct kobil_private *priv;
 590         int result;
 591         unsigned short urb_val = 0;
 592         int c_cflag = tty->termios->c_cflag;
 593         speed_t speed;
 594
 595         priv = usb_get_serial_port_data(port);
 596         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 597                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 598                 /* This device doesn't support ioctl calls */
 599                 *tty->termios = *old;
 600                 return;
 601         }
 602
 603         speed = tty_get_baud_rate(tty);
 604         switch (speed) {
 605         case 1200:
 606                 urb_val = SUSBCR_SBR_1200;
 607                 break;
 608         default:
 609                 speed = 9600;
 610         case 9600:
 611                 urb_val = SUSBCR_SBR_9600;
 612                 break;
 613         }
 614         urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits :
 615                                                         SUSBCR_SPASB_1StopBit;
 616         if (c_cflag & PARENB) {
 617                 if  (c_cflag & PARODD)
 618                         urb_val |= SUSBCR_SPASB_OddParity;
 619                 else
 620                         urb_val |= SUSBCR_SPASB_EvenParity;
 621         } else
 622                 urb_val |= SUSBCR_SPASB_NoParity;
 623         tty->termios->c_cflag &= ~CMSPAR;
 624         tty_encode_baud_rate(tty, speed, speed);
 625
 626         result = usb_control_msg(port->serial->dev,
 627                   usb_rcvctrlpipe(port->serial->dev, 0),
 628                   SUSBCRequest_SetBaudRateParityAndStopBits,
 629                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 630                   urb_val,
 631                   0,
 632                   NULL,
 633                   0,
 634                   KOBIL_TIMEOUT
 635                 );
 636 }
 637
 638 static int kobil_ioctl(struct tty_struct *tty,
 639                                         unsigned int cmd, unsigned long arg)
 640 {
 641         struct usb_serial_port *port = tty->driver_data;
 642         struct kobil_private *priv = usb_get_serial_port_data(port);
 643         unsigned char *transfer_buffer;
 644         int transfer_buffer_length = 8;
 645         int result;
 646
 647         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
 648                         priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)
 649                 /* This device doesn't support ioctl calls */
 650                 return -ENOIOCTLCMD;
 651
 652         switch (cmd) {
 653         case TCFLSH:
 654                 transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL);
 655                 if (!transfer_buffer)
 656                         return -ENOBUFS;
 657
 658                 result = usb_control_msg(port->serial->dev,
 659                           usb_rcvctrlpipe(port->serial->dev, 0),
 660                           SUSBCRequest_Misc,
 661                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 662                           SUSBCR_MSC_ResetAllQueues,
 663                           0,
 664                           NULL, /* transfer_buffer, */
 665                           0,
 666                           KOBIL_TIMEOUT
 667                         );
 668
 669                 dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __func__, port->number, result);
 670                 kfree(transfer_buffer);
 671                 return (result < 0) ? -EIO: 0;
 672         default:
 673                 return -ENOIOCTLCMD;
 674         }
 675 }
 676
 677 module_usb_serial_driver(kobil_driver, serial_drivers);
 678
 679 MODULE_AUTHOR(DRIVER_AUTHOR);
 680 MODULE_DESCRIPTION(DRIVER_DESC);
 681 MODULE_LICENSE("GPL");
 682
 683 module_param(debug, bool, S_IRUGO | S_IWUSR);
 684 MODULE_PARM_DESC(debug, "Debug enabled or not");