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