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  * (21/05/2004) tw
  25  *      Fix bug with P'n'P readers
  26  *
  27  * (28/05/2003) tw
  28  *      Add support for KAAN SIM
  29  *
  30  * (12/09/2002) tw
  31  *      Adapted to 2.5.
  32  *
  33  * (11/08/2002) tw
  34  *      Initial version.
  35  */
  36
  37
  38 #include <linux/config.h>
  39 #include <linux/kernel.h>
  40 #include <linux/errno.h>
  41 #include <linux/init.h>
  42 #include <linux/slab.h>
  43 #include <linux/tty.h>
  44 #include <linux/tty_driver.h>
  45 #include <linux/tty_flip.h>
  46 #include <linux/module.h>
  47 #include <linux/spinlock.h>
  48 #include <asm/uaccess.h>
  49 #include <linux/usb.h>
  50 #include <linux/ioctl.h>
  51 #include "usb-serial.h"
  52 #include "kobil_sct.h"
  53
  54 static int debug;
  55
  56 /* Version Information */
  57 #define DRIVER_VERSION "21/05/2004"
  58 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
  59 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
  60
  61 #define KOBIL_VENDOR_ID                 0x0D46
  62 #define KOBIL_ADAPTER_B_PRODUCT_ID      0x2011
  63 #define KOBIL_ADAPTER_K_PRODUCT_ID      0x2012
  64 #define KOBIL_USBTWIN_PRODUCT_ID        0x0078
  65 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
  66
  67 #define KOBIL_TIMEOUT           500
  68 #define KOBIL_BUF_LENGTH        300
  69
  70
  71 /* Function prototypes */
  72 static int  kobil_startup (struct usb_serial *serial);
  73 static void kobil_shutdown (struct usb_serial *serial);
  74 static int  kobil_open (struct usb_serial_port *port, struct file *filp);
  75 static void kobil_close (struct usb_serial_port *port, struct file *filp);
  76 static int  kobil_write (struct usb_serial_port *port,
  77                          const unsigned char *buf, int count);
  78 static int  kobil_write_room(struct usb_serial_port *port);
  79 static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
  80                         unsigned int cmd, unsigned long arg);
  81 static int  kobil_tiocmget(struct usb_serial_port *port, struct file *file);
  82 static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
  83                            unsigned int set, unsigned int clear);
  84 static void kobil_read_int_callback( struct urb *urb, struct pt_regs *regs );
  85 static void kobil_write_callback( struct urb *purb, struct pt_regs *regs );
  86
  87
  88 static struct usb_device_id id_table [] = {
  89         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
  90         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
  91         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
  92         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
  93         { }                     /* Terminating entry */
  94 };
  95
  96
  97 MODULE_DEVICE_TABLE (usb, id_table);
  98
  99 static struct usb_driver kobil_driver = {
 100         .name =         "kobil",
 101         .probe =        usb_serial_probe,
 102         .disconnect =   usb_serial_disconnect,
 103         .id_table =     id_table,
 104         .no_dynamic_id =        1,
 105 };
 106
 107
 108 static struct usb_serial_driver kobil_device = {
 109         .driver = {
 110                 .owner =        THIS_MODULE,
 111                 .name =         "kobil",
 112         },
 113         .description =          "KOBIL USB smart card terminal",
 114         .id_table =             id_table,
 115         .num_interrupt_in =     NUM_DONT_CARE,
 116         .num_bulk_in =          0,
 117         .num_bulk_out =         0,
 118         .num_ports =            1,
 119         .attach =               kobil_startup,
 120         .shutdown =             kobil_shutdown,
 121         .ioctl =                kobil_ioctl,
 122         .tiocmget =             kobil_tiocmget,
 123         .tiocmset =             kobil_tiocmset,
 124         .open =                 kobil_open,
 125         .close =                kobil_close,
 126         .write =                kobil_write,
 127         .write_room =           kobil_write_room,
 128         .read_int_callback =    kobil_read_int_callback,
 129 };
 130
 131
 132 struct kobil_private {
 133         int write_int_endpoint_address;
 134         int read_int_endpoint_address;
 135         unsigned char buf[KOBIL_BUF_LENGTH]; // buffer for the APDU to send
 136         int filled;  // index of the last char in buf
 137         int cur_pos; // index of the next char to send in buf
 138         __u16 device_type;
 139         int line_state;
 140         struct termios internal_termios;
 141 };
 142
 143
 144 static int kobil_startup (struct usb_serial *serial)
 145 {
 146         int i;
 147         struct kobil_private *priv;
 148         struct usb_device *pdev;
 149         struct usb_host_config *actconfig;
 150         struct usb_interface *interface;
 151         struct usb_host_interface *altsetting;
 152         struct usb_host_endpoint *endpoint;
 153
 154         priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
 155         if (!priv){
 156                 return -ENOMEM;
 157         }
 158
 159         priv->filled = 0;
 160         priv->cur_pos = 0;
 161         priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
 162         priv->line_state = 0;
 163
 164         switch (priv->device_type){
 165         case KOBIL_ADAPTER_B_PRODUCT_ID:
 166                 printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
 167                 break;
 168         case KOBIL_ADAPTER_K_PRODUCT_ID:
 169                 printk(KERN_DEBUG "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
 170                 break;
 171         case KOBIL_USBTWIN_PRODUCT_ID:
 172                 printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
 173                 break;
 174         case KOBIL_KAAN_SIM_PRODUCT_ID:
 175                 printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
 176                 break;
 177         }
 178         usb_set_serial_port_data(serial->port[0], priv);
 179
 180         // search for the necessary endpoints
 181         pdev = serial->dev;
 182         actconfig = pdev->actconfig;
 183         interface = actconfig->interface[0];
 184         altsetting = interface->cur_altsetting;
 185         endpoint = altsetting->endpoint;
 186
 187         for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
 188                 endpoint = &altsetting->endpoint[i];
 189                 if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) &&
 190                     ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
 191                         dbg("%s Found interrupt out endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
 192                         priv->write_int_endpoint_address = endpoint->desc.bEndpointAddress;
 193                 }
 194                 if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) &&
 195                     ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
 196                         dbg("%s Found interrupt in  endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
 197                         priv->read_int_endpoint_address = endpoint->desc.bEndpointAddress;
 198                 }
 199         }
 200         return 0;
 201 }
 202
 203
 204 static void kobil_shutdown (struct usb_serial *serial)
 205 {
 206         int i;
 207         dbg("%s - port %d", __FUNCTION__, serial->port[0]->number);
 208
 209         for (i=0; i < serial->num_ports; ++i) {
 210                 while (serial->port[i]->open_count > 0) {
 211                         kobil_close (serial->port[i], NULL);
 212                 }
 213                 kfree(usb_get_serial_port_data(serial->port[i]));
 214                 usb_set_serial_port_data(serial->port[i], NULL);
 215         }
 216 }
 217
 218
 219 static int kobil_open (struct usb_serial_port *port, struct file *filp)
 220 {
 221         int i, result = 0;
 222         struct kobil_private *priv;
 223         unsigned char *transfer_buffer;
 224         int transfer_buffer_length = 8;
 225         int write_urb_transfer_buffer_length = 8;
 226
 227         dbg("%s - port %d", __FUNCTION__, port->number);
 228         priv = usb_get_serial_port_data(port);
 229         priv->line_state = 0;
 230
 231         // someone sets the dev to 0 if the close method has been called
 232         port->interrupt_in_urb->dev = port->serial->dev;
 233
 234
 235         /* force low_latency on so that our tty_push actually forces
 236          * the data through, otherwise it is scheduled, and with high
 237          * data rates (like with OHCI) data can get lost.
 238          */
 239         port->tty->low_latency = 1;
 240
 241         // without this, every push_tty_char is echoed :-(
 242         port->tty->termios->c_lflag = 0;
 243         port->tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
 244         port->tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
 245         port->tty->termios->c_oflag &= ~ONLCR; // do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D)
 246
 247         // set up internal termios structure
 248         priv->internal_termios.c_iflag = port->tty->termios->c_iflag;
 249         priv->internal_termios.c_oflag = port->tty->termios->c_oflag;
 250         priv->internal_termios.c_cflag = port->tty->termios->c_cflag;
 251         priv->internal_termios.c_lflag = port->tty->termios->c_lflag;
 252
 253         for (i=0; i<NCCS; i++) {
 254                 priv->internal_termios.c_cc[i] = port->tty->termios->c_cc[i];
 255         }
 256
 257         // allocate memory for transfer buffer
 258         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 259         if (! transfer_buffer) {
 260                 return -ENOMEM;
 261         }
 262
 263         // allocate write_urb
 264         if (!port->write_urb) {
 265                 dbg("%s - port %d  Allocating port->write_urb", __FUNCTION__, port->number);
 266                 port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 267                 if (!port->write_urb) {
 268                         dbg("%s - port %d usb_alloc_urb failed", __FUNCTION__, port->number);
 269                         kfree(transfer_buffer);
 270                         return -ENOMEM;
 271                 }
 272         }
 273
 274         // allocate memory for write_urb transfer buffer
 275         port->write_urb->transfer_buffer = (unsigned char *) kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
 276         if (! port->write_urb->transfer_buffer) {
 277                 kfree(transfer_buffer);
 278                 usb_free_urb(port->write_urb);
 279                 port->write_urb = NULL;
 280                 return -ENOMEM;
 281         }
 282
 283         // get hardware version
 284         result = usb_control_msg( port->serial->dev,
 285                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 286                                   SUSBCRequest_GetMisc,
 287                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 288                                   SUSBCR_MSC_GetHWVersion,
 289                                   0,
 290                                   transfer_buffer,
 291                                   transfer_buffer_length,
 292                                   KOBIL_TIMEOUT
 293                 );
 294         dbg("%s - port %d Send get_HW_version URB returns: %i", __FUNCTION__, port->number, result);
 295         dbg("Harware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
 296
 297         // get firmware version
 298         result = usb_control_msg( port->serial->dev,
 299                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 300                                   SUSBCRequest_GetMisc,
 301                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 302                                   SUSBCR_MSC_GetFWVersion,
 303                                   0,
 304                                   transfer_buffer,
 305                                   transfer_buffer_length,
 306                                   KOBIL_TIMEOUT
 307                 );
 308         dbg("%s - port %d Send get_FW_version URB returns: %i", __FUNCTION__, port->number, result);
 309         dbg("Firmware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
 310
 311         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 312                 // Setting Baudrate, Parity and Stopbits
 313                 result = usb_control_msg( port->serial->dev,
 314                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 315                                           SUSBCRequest_SetBaudRateParityAndStopBits,
 316                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 317                                           SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity | SUSBCR_SPASB_1StopBit,
 318                                           0,
 319                                           transfer_buffer,
 320                                           0,
 321                                           KOBIL_TIMEOUT
 322                         );
 323                 dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
 324
 325                 // reset all queues
 326                 result = usb_control_msg( port->serial->dev,
 327                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 328                                           SUSBCRequest_Misc,
 329                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 330                                           SUSBCR_MSC_ResetAllQueues,
 331                                           0,
 332                                           transfer_buffer,
 333                                           0,
 334                                           KOBIL_TIMEOUT
 335                         );
 336                 dbg("%s - port %d Send reset_all_queues URB returns: %i", __FUNCTION__, port->number, result);
 337         }
 338         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 339             priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 340                 // start reading (Adapter B 'cause PNP string)
 341                 result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC  );
 342                 dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 343         }
 344
 345         kfree(transfer_buffer);
 346         return 0;
 347 }
 348
 349
 350 static void kobil_close (struct usb_serial_port *port, struct file *filp)
 351 {
 352         dbg("%s - port %d", __FUNCTION__, port->number);
 353
 354         if (port->write_urb) {
 355                 usb_kill_urb(port->write_urb);
 356                 usb_free_urb( port->write_urb );
 357                 port->write_urb = NULL;
 358         }
 359         if (port->interrupt_in_urb)
 360                 usb_kill_urb(port->interrupt_in_urb);
 361 }
 362
 363
 364 static void kobil_read_int_callback( struct urb *purb, struct pt_regs *regs)
 365 {
 366         int result;
 367         struct usb_serial_port *port = (struct usb_serial_port *) purb->context;
 368         struct tty_struct *tty;
 369         unsigned char *data = purb->transfer_buffer;
 370 //      char *dbg_data;
 371
 372         dbg("%s - port %d", __FUNCTION__, port->number);
 373
 374         if (purb->status) {
 375                 dbg("%s - port %d Read int status not zero: %d", __FUNCTION__, port->number, purb->status);
 376                 return;
 377         }
 378
 379         tty = port->tty;
 380         if (purb->actual_length) {
 381
 382                 // BEGIN DEBUG
 383                 /*
 384                   dbg_data = kzalloc((3 *  purb->actual_length + 10) * sizeof(char), GFP_KERNEL);
 385                   if (! dbg_data) {
 386                   return;
 387                   }
 388                   for (i = 0; i < purb->actual_length; i++) {
 389                   sprintf(dbg_data +3*i, "%02X ", data[i]);
 390                   }
 391                   dbg(" <-- %s", dbg_data );
 392                   kfree(dbg_data);
 393                 */
 394                 // END DEBUG
 395
 396                 tty_buffer_request_room(tty, purb->actual_length);
 397                 tty_insert_flip_string(tty, data, purb->actual_length);
 398                 tty_flip_buffer_push(tty);
 399         }
 400
 401         // someone sets the dev to 0 if the close method has been called
 402         port->interrupt_in_urb->dev = port->serial->dev;
 403
 404         result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC );
 405         dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 406 }
 407
 408
 409 static void kobil_write_callback( struct urb *purb, struct pt_regs *regs )
 410 {
 411 }
 412
 413
 414 static int kobil_write (struct usb_serial_port *port,
 415                         const unsigned char *buf, int count)
 416 {
 417         int length = 0;
 418         int result = 0;
 419         int todo = 0;
 420         struct kobil_private * priv;
 421
 422         if (count == 0) {
 423                 dbg("%s - port %d write request of 0 bytes", __FUNCTION__, port->number);
 424                 return 0;
 425         }
 426
 427         priv = usb_get_serial_port_data(port);
 428
 429         if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
 430                 dbg("%s - port %d Error: write request bigger than buffer size", __FUNCTION__, port->number);
 431                 return -ENOMEM;
 432         }
 433
 434         // Copy data to buffer
 435         memcpy (priv->buf + priv->filled, buf, count);
 436
 437         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, priv->buf + priv->filled);
 438
 439         priv->filled = priv->filled + count;
 440
 441
 442         // only send complete block. TWIN, KAAN SIM and adapter K use the same protocol.
 443         if ( ((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
 444              ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4))) ) {
 445
 446                 // stop reading (except TWIN and KAAN SIM)
 447                 if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) )
 448                         usb_kill_urb(port->interrupt_in_urb);
 449
 450                 todo = priv->filled - priv->cur_pos;
 451
 452                 while(todo > 0) {
 453                         // max 8 byte in one urb (endpoint size)
 454                         length = (todo < 8) ? todo : 8;
 455                         // copy data to transfer buffer
 456                         memcpy(port->write_urb->transfer_buffer, priv->buf + priv->cur_pos, length );
 457                         usb_fill_int_urb( port->write_urb,
 458                                           port->serial->dev,
 459                                           usb_sndintpipe(port->serial->dev, priv->write_int_endpoint_address),
 460                                           port->write_urb->transfer_buffer,
 461                                           length,
 462                                           kobil_write_callback,
 463                                           port,
 464                                           8
 465                                 );
 466
 467                         priv->cur_pos = priv->cur_pos + length;
 468                         result = usb_submit_urb( port->write_urb, GFP_NOIO );
 469                         dbg("%s - port %d Send write URB returns: %i", __FUNCTION__, port->number, result);
 470                         todo = priv->filled - priv->cur_pos;
 471
 472                         if (todo > 0) {
 473                                 msleep(24);
 474                         }
 475
 476                 } // end while
 477
 478                 priv->filled = 0;
 479                 priv->cur_pos = 0;
 480
 481                 // someone sets the dev to 0 if the close method has been called
 482                 port->interrupt_in_urb->dev = port->serial->dev;
 483
 484                 // start reading (except TWIN and KAAN SIM)
 485                 if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
 486                         // someone sets the dev to 0 if the close method has been called
 487                         port->interrupt_in_urb->dev = port->serial->dev;
 488
 489                         result = usb_submit_urb( port->interrupt_in_urb, GFP_NOIO );
 490                         dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 491                 }
 492         }
 493         return count;
 494 }
 495
 496
 497 static int kobil_write_room (struct usb_serial_port *port)
 498 {
 499         //dbg("%s - port %d", __FUNCTION__, port->number);
 500         return 8;
 501 }
 502
 503
 504 static int kobil_tiocmget(struct usb_serial_port *port, struct file *file)
 505 {
 506         struct kobil_private * priv;
 507         int result;
 508         unsigned char *transfer_buffer;
 509         int transfer_buffer_length = 8;
 510
 511         priv = usb_get_serial_port_data(port);
 512         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (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
 523         result = usb_control_msg( port->serial->dev,
 524                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 525                                   SUSBCRequest_GetStatusLineState,
 526                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 527                                   0,
 528                                   0,
 529                                   transfer_buffer,
 530                                   transfer_buffer_length,
 531                                   KOBIL_TIMEOUT);
 532
 533         dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x",
 534             __FUNCTION__, port->number, result, transfer_buffer[0]);
 535
 536         if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) {
 537                 priv->line_state |= TIOCM_DSR;
 538         } else {
 539                 priv->line_state &= ~TIOCM_DSR;
 540         }
 541
 542         kfree(transfer_buffer);
 543         return priv->line_state;
 544 }
 545
 546 static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
 547                            unsigned int set, unsigned int clear)
 548 {
 549         struct kobil_private * priv;
 550         int result;
 551         int dtr = 0;
 552         int rts = 0;
 553         unsigned char *transfer_buffer;
 554         int transfer_buffer_length = 8;
 555
 556         priv = usb_get_serial_port_data(port);
 557         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
 558                 // This device doesn't support ioctl calls
 559                 return -EINVAL;
 560         }
 561
 562         // allocate memory for transfer buffer
 563         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 564         if (! transfer_buffer) {
 565                 return -ENOMEM;
 566         }
 567
 568         if (set & TIOCM_RTS)
 569                 rts = 1;
 570         if (set & TIOCM_DTR)
 571                 dtr = 1;
 572         if (clear & TIOCM_RTS)
 573                 rts = 0;
 574         if (clear & TIOCM_DTR)
 575                 dtr = 0;
 576
 577         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
 578                 if (dtr != 0)
 579                         dbg("%s - port %d Setting DTR", __FUNCTION__, port->number);
 580                 else
 581                         dbg("%s - port %d Clearing DTR", __FUNCTION__, port->number);
 582                 result = usb_control_msg( port->serial->dev,
 583                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 584                                           SUSBCRequest_SetStatusLinesOrQueues,
 585                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 586                                           ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
 587                                           0,
 588                                           transfer_buffer,
 589                                           0,
 590                                           KOBIL_TIMEOUT);
 591         } else {
 592                 if (rts != 0)
 593                         dbg("%s - port %d Setting RTS", __FUNCTION__, port->number);
 594                 else
 595                         dbg("%s - port %d Clearing RTS", __FUNCTION__, port->number);
 596                 result = usb_control_msg( port->serial->dev,
 597                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 598                                           SUSBCRequest_SetStatusLinesOrQueues,
 599                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 600                                           ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
 601                                           0,
 602                                           transfer_buffer,
 603                                           0,
 604                                           KOBIL_TIMEOUT);
 605         }
 606         dbg("%s - port %d Send set_status_line URB returns: %i", __FUNCTION__, port->number, result);
 607         kfree(transfer_buffer);
 608         return (result < 0) ? result : 0;
 609 }
 610
 611
 612 static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
 613                         unsigned int cmd, unsigned long arg)
 614 {
 615         struct kobil_private * priv;
 616         int result;
 617         unsigned short urb_val = 0;
 618         unsigned char *transfer_buffer;
 619         int transfer_buffer_length = 8;
 620         char *settings;
 621         void __user *user_arg = (void __user *)arg;
 622
 623         priv = usb_get_serial_port_data(port);
 624         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
 625                 // This device doesn't support ioctl calls
 626                 return 0;
 627         }
 628
 629         switch (cmd) {
 630         case TCGETS:   // 0x5401
 631                 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios))) {
 632                         dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
 633                         return -EFAULT;
 634                 }
 635                 if (kernel_termios_to_user_termios((struct termios __user *)arg,
 636                                                    &priv->internal_termios))
 637                         return -EFAULT;
 638                 return 0;
 639
 640         case TCSETS:   // 0x5402
 641                 if (!(port->tty->termios)) {
 642                         dbg("%s - port %d Error: port->tty->termios is NULL", __FUNCTION__, port->number);
 643                         return -ENOTTY;
 644                 }
 645                 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios))) {
 646                         dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
 647                         return -EFAULT;
 648                 }
 649                 if (user_termios_to_kernel_termios(&priv->internal_termios,
 650                                                    (struct termios __user *)arg))
 651                         return -EFAULT;
 652
 653                 settings = kzalloc(50, GFP_KERNEL);
 654                 if (! settings) {
 655                         return -ENOBUFS;
 656                 }
 657
 658                 switch (priv->internal_termios.c_cflag & CBAUD) {
 659                 case B1200:
 660                         urb_val = SUSBCR_SBR_1200;
 661                         strcat(settings, "1200 ");
 662                         break;
 663                 case B9600:
 664                 default:
 665                         urb_val = SUSBCR_SBR_9600;
 666                         strcat(settings, "9600 ");
 667                         break;
 668                 }
 669
 670                 urb_val |= (priv->internal_termios.c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : SUSBCR_SPASB_1StopBit;
 671                 strcat(settings, (priv->internal_termios.c_cflag & CSTOPB) ? "2 StopBits " : "1 StopBit ");
 672
 673                 if (priv->internal_termios.c_cflag & PARENB) {
 674                         if  (priv->internal_termios.c_cflag & PARODD) {
 675                                 urb_val |= SUSBCR_SPASB_OddParity;
 676                                 strcat(settings, "Odd Parity");
 677                         } else {
 678                                 urb_val |= SUSBCR_SPASB_EvenParity;
 679                                 strcat(settings, "Even Parity");
 680                         }
 681                 } else {
 682                         urb_val |= SUSBCR_SPASB_NoParity;
 683                         strcat(settings, "No Parity");
 684                 }
 685                 dbg("%s - port %d setting port to: %s", __FUNCTION__, port->number, settings );
 686
 687                 result = usb_control_msg( port->serial->dev,
 688                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 689                                           SUSBCRequest_SetBaudRateParityAndStopBits,
 690                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 691                                           urb_val,
 692                                           0,
 693                                           settings,
 694                                           0,
 695                                           KOBIL_TIMEOUT
 696                         );
 697
 698                 dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
 699                 kfree(settings);
 700                 return 0;
 701
 702         case TCFLSH:   // 0x540B
 703                 transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);
 704                 if (! transfer_buffer) {
 705                         return -ENOBUFS;
 706                 }
 707
 708                 result = usb_control_msg( port->serial->dev,
 709                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 710                                           SUSBCRequest_Misc,
 711                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 712                                           SUSBCR_MSC_ResetAllQueues,
 713                                           0,
 714                                           NULL,//transfer_buffer,
 715                                           0,
 716                                           KOBIL_TIMEOUT
 717                         );
 718
 719                 dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __FUNCTION__, port->number, result);
 720
 721                 kfree(transfer_buffer);
 722                 return ((result < 0) ? -EFAULT : 0);
 723
 724         }
 725         return -ENOIOCTLCMD;
 726 }
 727
 728
 729 static int __init kobil_init (void)
 730 {
 731         int retval;
 732         retval = usb_serial_register(&kobil_device);
 733         if (retval)
 734                 goto failed_usb_serial_register;
 735         retval = usb_register(&kobil_driver);
 736         if (retval)
 737                 goto failed_usb_register;
 738
 739         info(DRIVER_VERSION " " DRIVER_AUTHOR);
 740         info(DRIVER_DESC);
 741
 742         return 0;
 743 failed_usb_register:
 744         usb_serial_deregister(&kobil_device);
 745 failed_usb_serial_register:
 746         return retval;
 747 }
 748
 749
 750 static void __exit kobil_exit (void)
 751 {
 752         usb_deregister (&kobil_driver);
 753         usb_serial_deregister (&kobil_device);
 754 }
 755
 756 module_init(kobil_init);
 757 module_exit(kobil_exit);
 758
 759 MODULE_AUTHOR( DRIVER_AUTHOR );
 760 MODULE_DESCRIPTION( DRIVER_DESC );
 761 MODULE_LICENSE( "GPL" );
 762
 763 module_param(debug, bool, S_IRUGO | S_IWUSR);
 764 MODULE_PARM_DESC(debug, "Debug enabled or not");