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