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