git.oblomov.eu Git - linux-2.6/blob - 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/kernel.h>
  39 #include <linux/errno.h>
  40 #include <linux/init.h>
  41 #include <linux/slab.h>
  42 #include <linux/tty.h>
  43 #include <linux/tty_driver.h>
  44 #include <linux/tty_flip.h>
  45 #include <linux/module.h>
  46 #include <linux/spinlock.h>
  47 #include <asm/uaccess.h>
  48 #include <linux/usb.h>
  49 #include <linux/usb/serial.h>
  50 #include <linux/ioctl.h>
  51 #include "kobil_sct.h"
  52
  53 static int debug;
  54
  55 /* Version Information */
  56 #define DRIVER_VERSION "21/05/2004"
  57 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
  58 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
  59
  60 #define KOBIL_VENDOR_ID                 0x0D46
  61 #define KOBIL_ADAPTER_B_PRODUCT_ID      0x2011
  62 #define KOBIL_ADAPTER_K_PRODUCT_ID      0x2012
  63 #define KOBIL_USBTWIN_PRODUCT_ID        0x0078
  64 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
  65
  66 #define KOBIL_TIMEOUT           500
  67 #define KOBIL_BUF_LENGTH        300
  68
  69
  70 /* Function prototypes */
  71 static int  kobil_startup (struct usb_serial *serial);
  72 static void kobil_shutdown (struct usb_serial *serial);
  73 static int  kobil_open (struct usb_serial_port *port, struct file *filp);
  74 static void kobil_close (struct usb_serial_port *port, struct file *filp);
  75 static int  kobil_write (struct usb_serial_port *port,
  76                          const unsigned char *buf, int count);
  77 static int  kobil_write_room(struct usb_serial_port *port);
  78 static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
  79                         unsigned int cmd, unsigned long arg);
  80 static int  kobil_tiocmget(struct usb_serial_port *port, struct file *file);
  81 static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
  82                            unsigned int set, unsigned int clear);
  83 static void kobil_read_int_callback( struct urb *urb, struct pt_regs *regs );
  84 static void kobil_write_callback( struct urb *purb, struct pt_regs *regs );
  85
  86
  87 static struct usb_device_id id_table [] = {
  88         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
  89         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
  90         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
  91         { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
  92         { }                     /* Terminating entry */
  93 };
  94
  95
  96 MODULE_DEVICE_TABLE (usb, id_table);
  97
  98 static struct usb_driver kobil_driver = {
  99         .name =         "kobil",
 100         .probe =        usb_serial_probe,
 101         .disconnect =   usb_serial_disconnect,
 102         .id_table =     id_table,
 103         .no_dynamic_id =        1,
 104 };
 105
 106
 107 static struct usb_serial_driver kobil_device = {
 108         .driver = {
 109                 .owner =        THIS_MODULE,
 110                 .name =         "kobil",
 111         },
 112         .description =          "KOBIL USB smart card terminal",
 113         .id_table =             id_table,
 114         .num_interrupt_in =     NUM_DONT_CARE,
 115         .num_bulk_in =          0,
 116         .num_bulk_out =         0,
 117         .num_ports =            1,
 118         .attach =               kobil_startup,
 119         .shutdown =             kobil_shutdown,
 120         .ioctl =                kobil_ioctl,
 121         .tiocmget =             kobil_tiocmget,
 122         .tiocmset =             kobil_tiocmset,
 123         .open =                 kobil_open,
 124         .close =                kobil_close,
 125         .write =                kobil_write,
 126         .write_room =           kobil_write_room,
 127         .read_int_callback =    kobil_read_int_callback,
 128 };
 129
 130
 131 struct kobil_private {
 132         int write_int_endpoint_address;
 133         int read_int_endpoint_address;
 134         unsigned char buf[KOBIL_BUF_LENGTH]; // buffer for the APDU to send
 135         int filled;  // index of the last char in buf
 136         int cur_pos; // index of the next char to send in buf
 137         __u16 device_type;
 138         int line_state;
 139         struct termios internal_termios;
 140 };
 141
 142
 143 static int kobil_startup (struct usb_serial *serial)
 144 {
 145         int i;
 146         struct kobil_private *priv;
 147         struct usb_device *pdev;
 148         struct usb_host_config *actconfig;
 149         struct usb_interface *interface;
 150         struct usb_host_interface *altsetting;
 151         struct usb_host_endpoint *endpoint;
 152
 153         priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
 154         if (!priv){
 155                 return -ENOMEM;
 156         }
 157
 158         priv->filled = 0;
 159         priv->cur_pos = 0;
 160         priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
 161         priv->line_state = 0;
 162
 163         switch (priv->device_type){
 164         case KOBIL_ADAPTER_B_PRODUCT_ID:
 165                 printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
 166                 break;
 167         case KOBIL_ADAPTER_K_PRODUCT_ID:
 168                 printk(KERN_DEBUG "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
 169                 break;
 170         case KOBIL_USBTWIN_PRODUCT_ID:
 171                 printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
 172                 break;
 173         case KOBIL_KAAN_SIM_PRODUCT_ID:
 174                 printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
 175                 break;
 176         }
 177         usb_set_serial_port_data(serial->port[0], priv);
 178
 179         // search for the necessary endpoints
 180         pdev = serial->dev;
 181         actconfig = pdev->actconfig;
 182         interface = actconfig->interface[0];
 183         altsetting = interface->cur_altsetting;
 184         endpoint = altsetting->endpoint;
 185
 186         for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
 187                 endpoint = &altsetting->endpoint[i];
 188                 if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) &&
 189                     ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
 190                         dbg("%s Found interrupt out endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
 191                         priv->write_int_endpoint_address = endpoint->desc.bEndpointAddress;
 192                 }
 193                 if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) &&
 194                     ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
 195                         dbg("%s Found interrupt in  endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
 196                         priv->read_int_endpoint_address = endpoint->desc.bEndpointAddress;
 197                 }
 198         }
 199         return 0;
 200 }
 201
 202
 203 static void kobil_shutdown (struct usb_serial *serial)
 204 {
 205         int i;
 206         dbg("%s - port %d", __FUNCTION__, serial->port[0]->number);
 207
 208         for (i=0; i < serial->num_ports; ++i) {
 209                 while (serial->port[i]->open_count > 0) {
 210                         kobil_close (serial->port[i], NULL);
 211                 }
 212                 kfree(usb_get_serial_port_data(serial->port[i]));
 213                 usb_set_serial_port_data(serial->port[i], NULL);
 214         }
 215 }
 216
 217
 218 static int kobil_open (struct usb_serial_port *port, struct file *filp)
 219 {
 220         int i, result = 0;
 221         struct kobil_private *priv;
 222         unsigned char *transfer_buffer;
 223         int transfer_buffer_length = 8;
 224         int write_urb_transfer_buffer_length = 8;
 225
 226         dbg("%s - port %d", __FUNCTION__, port->number);
 227         priv = usb_get_serial_port_data(port);
 228         priv->line_state = 0;
 229
 230         // someone sets the dev to 0 if the close method has been called
 231         port->interrupt_in_urb->dev = port->serial->dev;
 232
 233
 234         /* force low_latency on so that our tty_push actually forces
 235          * the data through, otherwise it is scheduled, and with high
 236          * data rates (like with OHCI) data can get lost.
 237          */
 238         port->tty->low_latency = 1;
 239
 240         // without this, every push_tty_char is echoed :-(
 241         port->tty->termios->c_lflag = 0;
 242         port->tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
 243         port->tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
 244         port->tty->termios->c_oflag &= ~ONLCR; // do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D)
 245
 246         // set up internal termios structure
 247         priv->internal_termios.c_iflag = port->tty->termios->c_iflag;
 248         priv->internal_termios.c_oflag = port->tty->termios->c_oflag;
 249         priv->internal_termios.c_cflag = port->tty->termios->c_cflag;
 250         priv->internal_termios.c_lflag = port->tty->termios->c_lflag;
 251
 252         for (i=0; i<NCCS; i++) {
 253                 priv->internal_termios.c_cc[i] = port->tty->termios->c_cc[i];
 254         }
 255
 256         // allocate memory for transfer buffer
 257         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 258         if (! transfer_buffer) {
 259                 return -ENOMEM;
 260         }
 261
 262         // allocate write_urb
 263         if (!port->write_urb) {
 264                 dbg("%s - port %d  Allocating port->write_urb", __FUNCTION__, port->number);
 265                 port->write_urb = usb_alloc_urb(0, GFP_KERNEL);
 266                 if (!port->write_urb) {
 267                         dbg("%s - port %d usb_alloc_urb failed", __FUNCTION__, port->number);
 268                         kfree(transfer_buffer);
 269                         return -ENOMEM;
 270                 }
 271         }
 272
 273         // allocate memory for write_urb transfer buffer
 274         port->write_urb->transfer_buffer = (unsigned char *) kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
 275         if (! port->write_urb->transfer_buffer) {
 276                 kfree(transfer_buffer);
 277                 usb_free_urb(port->write_urb);
 278                 port->write_urb = NULL;
 279                 return -ENOMEM;
 280         }
 281
 282         // get hardware version
 283         result = usb_control_msg( port->serial->dev,
 284                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 285                                   SUSBCRequest_GetMisc,
 286                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 287                                   SUSBCR_MSC_GetHWVersion,
 288                                   0,
 289                                   transfer_buffer,
 290                                   transfer_buffer_length,
 291                                   KOBIL_TIMEOUT
 292                 );
 293         dbg("%s - port %d Send get_HW_version URB returns: %i", __FUNCTION__, port->number, result);
 294         dbg("Harware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
 295
 296         // get firmware version
 297         result = usb_control_msg( port->serial->dev,
 298                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 299                                   SUSBCRequest_GetMisc,
 300                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 301                                   SUSBCR_MSC_GetFWVersion,
 302                                   0,
 303                                   transfer_buffer,
 304                                   transfer_buffer_length,
 305                                   KOBIL_TIMEOUT
 306                 );
 307         dbg("%s - port %d Send get_FW_version URB returns: %i", __FUNCTION__, port->number, result);
 308         dbg("Firmware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
 309
 310         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
 311                 // Setting Baudrate, Parity and Stopbits
 312                 result = usb_control_msg( port->serial->dev,
 313                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 314                                           SUSBCRequest_SetBaudRateParityAndStopBits,
 315                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 316                                           SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity | SUSBCR_SPASB_1StopBit,
 317                                           0,
 318                                           transfer_buffer,
 319                                           0,
 320                                           KOBIL_TIMEOUT
 321                         );
 322                 dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
 323
 324                 // reset all queues
 325                 result = usb_control_msg( port->serial->dev,
 326                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 327                                           SUSBCRequest_Misc,
 328                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 329                                           SUSBCR_MSC_ResetAllQueues,
 330                                           0,
 331                                           transfer_buffer,
 332                                           0,
 333                                           KOBIL_TIMEOUT
 334                         );
 335                 dbg("%s - port %d Send reset_all_queues URB returns: %i", __FUNCTION__, port->number, result);
 336         }
 337         if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
 338             priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
 339                 // start reading (Adapter B 'cause PNP string)
 340                 result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC  );
 341                 dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 342         }
 343
 344         kfree(transfer_buffer);
 345         return 0;
 346 }
 347
 348
 349 static void kobil_close (struct usb_serial_port *port, struct file *filp)
 350 {
 351         dbg("%s - port %d", __FUNCTION__, port->number);
 352
 353         if (port->write_urb) {
 354                 usb_kill_urb(port->write_urb);
 355                 usb_free_urb( port->write_urb );
 356                 port->write_urb = NULL;
 357         }
 358         if (port->interrupt_in_urb)
 359                 usb_kill_urb(port->interrupt_in_urb);
 360 }
 361
 362
 363 static void kobil_read_int_callback( struct urb *purb, struct pt_regs *regs)
 364 {
 365         int result;
 366         struct usb_serial_port *port = (struct usb_serial_port *) purb->context;
 367         struct tty_struct *tty;
 368         unsigned char *data = purb->transfer_buffer;
 369 //      char *dbg_data;
 370
 371         dbg("%s - port %d", __FUNCTION__, port->number);
 372
 373         if (purb->status) {
 374                 dbg("%s - port %d Read int status not zero: %d", __FUNCTION__, port->number, purb->status);
 375                 return;
 376         }
 377
 378         tty = port->tty;
 379         if (purb->actual_length) {
 380
 381                 // BEGIN DEBUG
 382                 /*
 383                   dbg_data = kzalloc((3 *  purb->actual_length + 10) * sizeof(char), GFP_KERNEL);
 384                   if (! dbg_data) {
 385                   return;
 386                   }
 387                   for (i = 0; i < purb->actual_length; i++) {
 388                   sprintf(dbg_data +3*i, "%02X ", data[i]);
 389                   }
 390                   dbg(" <-- %s", dbg_data );
 391                   kfree(dbg_data);
 392                 */
 393                 // END DEBUG
 394
 395                 tty_buffer_request_room(tty, purb->actual_length);
 396                 tty_insert_flip_string(tty, data, purb->actual_length);
 397                 tty_flip_buffer_push(tty);
 398         }
 399
 400         // someone sets the dev to 0 if the close method has been called
 401         port->interrupt_in_urb->dev = port->serial->dev;
 402
 403         result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC );
 404         dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 405 }
 406
 407
 408 static void kobil_write_callback( struct urb *purb, struct pt_regs *regs )
 409 {
 410 }
 411
 412
 413 static int kobil_write (struct usb_serial_port *port,
 414                         const unsigned char *buf, int count)
 415 {
 416         int length = 0;
 417         int result = 0;
 418         int todo = 0;
 419         struct kobil_private * priv;
 420
 421         if (count == 0) {
 422                 dbg("%s - port %d write request of 0 bytes", __FUNCTION__, port->number);
 423                 return 0;
 424         }
 425
 426         priv = usb_get_serial_port_data(port);
 427
 428         if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
 429                 dbg("%s - port %d Error: write request bigger than buffer size", __FUNCTION__, port->number);
 430                 return -ENOMEM;
 431         }
 432
 433         // Copy data to buffer
 434         memcpy (priv->buf + priv->filled, buf, count);
 435
 436         usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, priv->buf + priv->filled);
 437
 438         priv->filled = priv->filled + count;
 439
 440
 441         // only send complete block. TWIN, KAAN SIM and adapter K use the same protocol.
 442         if ( ((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
 443              ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4))) ) {
 444
 445                 // stop reading (except TWIN and KAAN SIM)
 446                 if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) )
 447                         usb_kill_urb(port->interrupt_in_urb);
 448
 449                 todo = priv->filled - priv->cur_pos;
 450
 451                 while(todo > 0) {
 452                         // max 8 byte in one urb (endpoint size)
 453                         length = (todo < 8) ? todo : 8;
 454                         // copy data to transfer buffer
 455                         memcpy(port->write_urb->transfer_buffer, priv->buf + priv->cur_pos, length );
 456                         usb_fill_int_urb( port->write_urb,
 457                                           port->serial->dev,
 458                                           usb_sndintpipe(port->serial->dev, priv->write_int_endpoint_address),
 459                                           port->write_urb->transfer_buffer,
 460                                           length,
 461                                           kobil_write_callback,
 462                                           port,
 463                                           8
 464                                 );
 465
 466                         priv->cur_pos = priv->cur_pos + length;
 467                         result = usb_submit_urb( port->write_urb, GFP_NOIO );
 468                         dbg("%s - port %d Send write URB returns: %i", __FUNCTION__, port->number, result);
 469                         todo = priv->filled - priv->cur_pos;
 470
 471                         if (todo > 0) {
 472                                 msleep(24);
 473                         }
 474
 475                 } // end while
 476
 477                 priv->filled = 0;
 478                 priv->cur_pos = 0;
 479
 480                 // someone sets the dev to 0 if the close method has been called
 481                 port->interrupt_in_urb->dev = port->serial->dev;
 482
 483                 // start reading (except TWIN and KAAN SIM)
 484                 if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
 485                         // someone sets the dev to 0 if the close method has been called
 486                         port->interrupt_in_urb->dev = port->serial->dev;
 487
 488                         result = usb_submit_urb( port->interrupt_in_urb, GFP_NOIO );
 489                         dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
 490                 }
 491         }
 492         return count;
 493 }
 494
 495
 496 static int kobil_write_room (struct usb_serial_port *port)
 497 {
 498         //dbg("%s - port %d", __FUNCTION__, port->number);
 499         return 8;
 500 }
 501
 502
 503 static int kobil_tiocmget(struct usb_serial_port *port, struct file *file)
 504 {
 505         struct kobil_private * priv;
 506         int result;
 507         unsigned char *transfer_buffer;
 508         int transfer_buffer_length = 8;
 509
 510         priv = usb_get_serial_port_data(port);
 511         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
 512                 // This device doesn't support ioctl calls
 513                 return -EINVAL;
 514         }
 515
 516         // allocate memory for transfer buffer
 517         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 518         if (!transfer_buffer) {
 519                 return -ENOMEM;
 520         }
 521
 522         result = usb_control_msg( port->serial->dev,
 523                                   usb_rcvctrlpipe(port->serial->dev, 0 ),
 524                                   SUSBCRequest_GetStatusLineState,
 525                                   USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
 526                                   0,
 527                                   0,
 528                                   transfer_buffer,
 529                                   transfer_buffer_length,
 530                                   KOBIL_TIMEOUT);
 531
 532         dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x",
 533             __FUNCTION__, port->number, result, transfer_buffer[0]);
 534
 535         if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) {
 536                 priv->line_state |= TIOCM_DSR;
 537         } else {
 538                 priv->line_state &= ~TIOCM_DSR;
 539         }
 540
 541         kfree(transfer_buffer);
 542         return priv->line_state;
 543 }
 544
 545 static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
 546                            unsigned int set, unsigned int clear)
 547 {
 548         struct kobil_private * priv;
 549         int result;
 550         int dtr = 0;
 551         int rts = 0;
 552         unsigned char *transfer_buffer;
 553         int transfer_buffer_length = 8;
 554
 555         priv = usb_get_serial_port_data(port);
 556         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
 557                 // This device doesn't support ioctl calls
 558                 return -EINVAL;
 559         }
 560
 561         // allocate memory for transfer buffer
 562         transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
 563         if (! transfer_buffer) {
 564                 return -ENOMEM;
 565         }
 566
 567         if (set & TIOCM_RTS)
 568                 rts = 1;
 569         if (set & TIOCM_DTR)
 570                 dtr = 1;
 571         if (clear & TIOCM_RTS)
 572                 rts = 0;
 573         if (clear & TIOCM_DTR)
 574                 dtr = 0;
 575
 576         if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
 577                 if (dtr != 0)
 578                         dbg("%s - port %d Setting DTR", __FUNCTION__, port->number);
 579                 else
 580                         dbg("%s - port %d Clearing DTR", __FUNCTION__, port->number);
 581                 result = usb_control_msg( port->serial->dev,
 582                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 583                                           SUSBCRequest_SetStatusLinesOrQueues,
 584                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 585                                           ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
 586                                           0,
 587                                           transfer_buffer,
 588                                           0,
 589                                           KOBIL_TIMEOUT);
 590         } else {
 591                 if (rts != 0)
 592                         dbg("%s - port %d Setting RTS", __FUNCTION__, port->number);
 593                 else
 594                         dbg("%s - port %d Clearing RTS", __FUNCTION__, port->number);
 595                 result = usb_control_msg( port->serial->dev,
 596                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 597                                           SUSBCRequest_SetStatusLinesOrQueues,
 598                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 599                                           ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
 600                                           0,
 601                                           transfer_buffer,
 602                                           0,
 603                                           KOBIL_TIMEOUT);
 604         }
 605         dbg("%s - port %d Send set_status_line URB returns: %i", __FUNCTION__, port->number, result);
 606         kfree(transfer_buffer);
 607         return (result < 0) ? result : 0;
 608 }
 609
 610
 611 static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
 612                         unsigned int cmd, unsigned long arg)
 613 {
 614         struct kobil_private * priv;
 615         int result;
 616         unsigned short urb_val = 0;
 617         unsigned char *transfer_buffer;
 618         int transfer_buffer_length = 8;
 619         char *settings;
 620         void __user *user_arg = (void __user *)arg;
 621
 622         priv = usb_get_serial_port_data(port);
 623         if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
 624                 // This device doesn't support ioctl calls
 625                 return 0;
 626         }
 627
 628         switch (cmd) {
 629         case TCGETS:   // 0x5401
 630                 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios))) {
 631                         dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
 632                         return -EFAULT;
 633                 }
 634                 if (kernel_termios_to_user_termios((struct termios __user *)arg,
 635                                                    &priv->internal_termios))
 636                         return -EFAULT;
 637                 return 0;
 638
 639         case TCSETS:   // 0x5402
 640                 if (!(port->tty->termios)) {
 641                         dbg("%s - port %d Error: port->tty->termios is NULL", __FUNCTION__, port->number);
 642                         return -ENOTTY;
 643                 }
 644                 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios))) {
 645                         dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
 646                         return -EFAULT;
 647                 }
 648                 if (user_termios_to_kernel_termios(&priv->internal_termios,
 649                                                    (struct termios __user *)arg))
 650                         return -EFAULT;
 651
 652                 settings = kzalloc(50, GFP_KERNEL);
 653                 if (! settings) {
 654                         return -ENOBUFS;
 655                 }
 656
 657                 switch (priv->internal_termios.c_cflag & CBAUD) {
 658                 case B1200:
 659                         urb_val = SUSBCR_SBR_1200;
 660                         strcat(settings, "1200 ");
 661                         break;
 662                 case B9600:
 663                 default:
 664                         urb_val = SUSBCR_SBR_9600;
 665                         strcat(settings, "9600 ");
 666                         break;
 667                 }
 668
 669                 urb_val |= (priv->internal_termios.c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : SUSBCR_SPASB_1StopBit;
 670                 strcat(settings, (priv->internal_termios.c_cflag & CSTOPB) ? "2 StopBits " : "1 StopBit ");
 671
 672                 if (priv->internal_termios.c_cflag & PARENB) {
 673                         if  (priv->internal_termios.c_cflag & PARODD) {
 674                                 urb_val |= SUSBCR_SPASB_OddParity;
 675                                 strcat(settings, "Odd Parity");
 676                         } else {
 677                                 urb_val |= SUSBCR_SPASB_EvenParity;
 678                                 strcat(settings, "Even Parity");
 679                         }
 680                 } else {
 681                         urb_val |= SUSBCR_SPASB_NoParity;
 682                         strcat(settings, "No Parity");
 683                 }
 684                 dbg("%s - port %d setting port to: %s", __FUNCTION__, port->number, settings );
 685
 686                 result = usb_control_msg( port->serial->dev,
 687                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 688                                           SUSBCRequest_SetBaudRateParityAndStopBits,
 689                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 690                                           urb_val,
 691                                           0,
 692                                           settings,
 693                                           0,
 694                                           KOBIL_TIMEOUT
 695                         );
 696
 697                 dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
 698                 kfree(settings);
 699                 return 0;
 700
 701         case TCFLSH:   // 0x540B
 702                 transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);
 703                 if (! transfer_buffer) {
 704                         return -ENOBUFS;
 705                 }
 706
 707                 result = usb_control_msg( port->serial->dev,
 708                                           usb_rcvctrlpipe(port->serial->dev, 0 ),
 709                                           SUSBCRequest_Misc,
 710                                           USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
 711                                           SUSBCR_MSC_ResetAllQueues,
 712                                           0,
 713                                           NULL,//transfer_buffer,
 714                                           0,
 715                                           KOBIL_TIMEOUT
 716                         );
 717
 718                 dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __FUNCTION__, port->number, result);
 719
 720                 kfree(transfer_buffer);
 721                 return ((result < 0) ? -EFAULT : 0);
 722
 723         }
 724         return -ENOIOCTLCMD;
 725 }
 726
 727
 728 static int __init kobil_init (void)
 729 {
 730         int retval;
 731         retval = usb_serial_register(&kobil_device);
 732         if (retval)
 733                 goto failed_usb_serial_register;
 734         retval = usb_register(&kobil_driver);
 735         if (retval)
 736                 goto failed_usb_register;
 737
 738         info(DRIVER_VERSION " " DRIVER_AUTHOR);
 739         info(DRIVER_DESC);
 740
 741         return 0;
 742 failed_usb_register:
 743         usb_serial_deregister(&kobil_device);
 744 failed_usb_serial_register:
 745         return retval;
 746 }
 747
 748
 749 static void __exit kobil_exit (void)
 750 {
 751         usb_deregister (&kobil_driver);
 752         usb_serial_deregister (&kobil_device);
 753 }
 754
 755 module_init(kobil_init);
 756 module_exit(kobil_exit);
 757
 758 MODULE_AUTHOR( DRIVER_AUTHOR );
 759 MODULE_DESCRIPTION( DRIVER_DESC );
 760 MODULE_LICENSE( "GPL" );
 761
 762 module_param(debug, bool, S_IRUGO | S_IWUSR);
 763 MODULE_PARM_DESC(debug, "Debug enabled or not");