1 /* 2 * KOBIL USB Smart Card Terminal Driver 3 * 4 * Copyright (C) 2002 KOBIL Systems GmbH 5 * Author: Thomas Wahrenbruch 6 * 7 * Contact: linuxusb@kobil.de 8 * 9 * This program is largely derived from work by the linux-usb group 10 * and associated source files. Please see the usb/serial files for 11 * individual credits and copyrights. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 * 18 * Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and 19 * patience. 20 * 21 * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus 22 * (Adapter K), B1 Professional and KAAN Professional (Adapter B) 23 */ 24 25 26 #include <linux/kernel.h> 27 #include <linux/errno.h> 28 #include <linux/init.h> 29 #include <linux/slab.h> 30 #include <linux/tty.h> 31 #include <linux/tty_driver.h> 32 #include <linux/tty_flip.h> 33 #include <linux/module.h> 34 #include <linux/spinlock.h> 35 #include <linux/uaccess.h> 36 #include <linux/usb.h> 37 #include <linux/usb/serial.h> 38 #include <linux/ioctl.h> 39 #include "kobil_sct.h" 40 41 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com" 42 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)" 43 44 #define KOBIL_VENDOR_ID 0x0D46 45 #define KOBIL_ADAPTER_B_PRODUCT_ID 0x2011 46 #define KOBIL_ADAPTER_K_PRODUCT_ID 0x2012 47 #define KOBIL_USBTWIN_PRODUCT_ID 0x0078 48 #define KOBIL_KAAN_SIM_PRODUCT_ID 0x0081 49 50 #define KOBIL_TIMEOUT 500 51 #define KOBIL_BUF_LENGTH 300 52 53 54 /* Function prototypes */ 55 static int kobil_port_probe(struct usb_serial_port *probe); 56 static int kobil_port_remove(struct usb_serial_port *probe); 57 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port); 58 static void kobil_close(struct usb_serial_port *port); 59 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port, 60 const unsigned char *buf, int count); 61 static int kobil_write_room(struct tty_struct *tty); 62 static int kobil_ioctl(struct tty_struct *tty, 63 unsigned int cmd, unsigned long arg); 64 static int kobil_tiocmget(struct tty_struct *tty); 65 static int kobil_tiocmset(struct tty_struct *tty, 66 unsigned int set, unsigned int clear); 67 static void kobil_read_int_callback(struct urb *urb); 68 static void kobil_write_callback(struct urb *purb); 69 static void kobil_set_termios(struct tty_struct *tty, 70 struct usb_serial_port *port, struct ktermios *old); 71 static void kobil_init_termios(struct tty_struct *tty); 72 73 static const struct usb_device_id id_table[] = { 74 { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) }, 75 { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) }, 76 { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) }, 77 { USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) }, 78 { } /* Terminating entry */ 79 }; 80 MODULE_DEVICE_TABLE(usb, id_table); 81 82 static struct usb_serial_driver kobil_device = { 83 .driver = { 84 .owner = THIS_MODULE, 85 .name = "kobil", 86 }, 87 .description = "KOBIL USB smart card terminal", 88 .id_table = id_table, 89 .num_ports = 1, 90 .port_probe = kobil_port_probe, 91 .port_remove = kobil_port_remove, 92 .ioctl = kobil_ioctl, 93 .set_termios = kobil_set_termios, 94 .init_termios = kobil_init_termios, 95 .tiocmget = kobil_tiocmget, 96 .tiocmset = kobil_tiocmset, 97 .open = kobil_open, 98 .close = kobil_close, 99 .write = kobil_write, 100 .write_room = kobil_write_room, 101 .read_int_callback = kobil_read_int_callback, 102 }; 103 104 static struct usb_serial_driver * const serial_drivers[] = { 105 &kobil_device, NULL 106 }; 107 108 struct kobil_private { 109 int write_int_endpoint_address; 110 int read_int_endpoint_address; 111 unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */ 112 int filled; /* index of the last char in buf */ 113 int cur_pos; /* index of the next char to send in buf */ 114 __u16 device_type; 115 }; 116 117 118 static int kobil_port_probe(struct usb_serial_port *port) 119 { 120 int i; 121 struct usb_serial *serial = port->serial; 122 struct kobil_private *priv; 123 struct usb_device *pdev; 124 struct usb_host_config *actconfig; 125 struct usb_interface *interface; 126 struct usb_host_interface *altsetting; 127 struct usb_host_endpoint *endpoint; 128 129 priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL); 130 if (!priv) 131 return -ENOMEM; 132 133 priv->filled = 0; 134 priv->cur_pos = 0; 135 priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct); 136 137 switch (priv->device_type) { 138 case KOBIL_ADAPTER_B_PRODUCT_ID: 139 dev_dbg(&serial->dev->dev, "KOBIL B1 PRO / KAAN PRO detected\n"); 140 break; 141 case KOBIL_ADAPTER_K_PRODUCT_ID: 142 dev_dbg(&serial->dev->dev, "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n"); 143 break; 144 case KOBIL_USBTWIN_PRODUCT_ID: 145 dev_dbg(&serial->dev->dev, "KOBIL USBTWIN detected\n"); 146 break; 147 case KOBIL_KAAN_SIM_PRODUCT_ID: 148 dev_dbg(&serial->dev->dev, "KOBIL KAAN SIM detected\n"); 149 break; 150 } 151 usb_set_serial_port_data(port, priv); 152 153 /* search for the necessary endpoints */ 154 pdev = serial->dev; 155 actconfig = pdev->actconfig; 156 interface = actconfig->interface[0]; 157 altsetting = interface->cur_altsetting; 158 endpoint = altsetting->endpoint; 159 160 for (i = 0; i < altsetting->desc.bNumEndpoints; i++) { 161 endpoint = &altsetting->endpoint[i]; 162 if (usb_endpoint_is_int_out(&endpoint->desc)) { 163 dev_dbg(&serial->dev->dev, 164 "%s Found interrupt out endpoint. Address: %d\n", 165 __func__, endpoint->desc.bEndpointAddress); 166 priv->write_int_endpoint_address = 167 endpoint->desc.bEndpointAddress; 168 } 169 if (usb_endpoint_is_int_in(&endpoint->desc)) { 170 dev_dbg(&serial->dev->dev, 171 "%s Found interrupt in endpoint. Address: %d\n", 172 __func__, endpoint->desc.bEndpointAddress); 173 priv->read_int_endpoint_address = 174 endpoint->desc.bEndpointAddress; 175 } 176 } 177 return 0; 178 } 179 180 181 static int kobil_port_remove(struct usb_serial_port *port) 182 { 183 struct kobil_private *priv; 184 185 priv = usb_get_serial_port_data(port); 186 kfree(priv); 187 188 return 0; 189 } 190 191 static void kobil_init_termios(struct tty_struct *tty) 192 { 193 /* Default to echo off and other sane device settings */ 194 tty->termios.c_lflag = 0; 195 tty->termios.c_iflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE); 196 tty->termios.c_iflag |= IGNBRK | IGNPAR | IXOFF; 197 /* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */ 198 tty->termios.c_oflag &= ~ONLCR; 199 } 200 201 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port) 202 { 203 struct device *dev = &port->dev; 204 int result = 0; 205 struct kobil_private *priv; 206 unsigned char *transfer_buffer; 207 int transfer_buffer_length = 8; 208 int write_urb_transfer_buffer_length = 8; 209 210 priv = usb_get_serial_port_data(port); 211 212 /* allocate memory for transfer buffer */ 213 transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL); 214 if (!transfer_buffer) 215 return -ENOMEM; 216 217 /* allocate write_urb */ 218 if (!port->write_urb) { 219 dev_dbg(dev, "%s - Allocating port->write_urb\n", __func__); 220 port->write_urb = usb_alloc_urb(0, GFP_KERNEL); 221 if (!port->write_urb) { 222 dev_dbg(dev, "%s - usb_alloc_urb failed\n", __func__); 223 kfree(transfer_buffer); 224 return -ENOMEM; 225 } 226 } 227 228 /* allocate memory for write_urb transfer buffer */ 229 port->write_urb->transfer_buffer = 230 kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL); 231 if (!port->write_urb->transfer_buffer) { 232 kfree(transfer_buffer); 233 usb_free_urb(port->write_urb); 234 port->write_urb = NULL; 235 return -ENOMEM; 236 } 237 238 /* get hardware version */ 239 result = usb_control_msg(port->serial->dev, 240 usb_rcvctrlpipe(port->serial->dev, 0), 241 SUSBCRequest_GetMisc, 242 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN, 243 SUSBCR_MSC_GetHWVersion, 244 0, 245 transfer_buffer, 246 transfer_buffer_length, 247 KOBIL_TIMEOUT 248 ); 249 dev_dbg(dev, "%s - Send get_HW_version URB returns: %i\n", __func__, result); 250 dev_dbg(dev, "Harware version: %i.%i.%i\n", transfer_buffer[0], 251 transfer_buffer[1], transfer_buffer[2]); 252 253 /* get firmware version */ 254 result = usb_control_msg(port->serial->dev, 255 usb_rcvctrlpipe(port->serial->dev, 0), 256 SUSBCRequest_GetMisc, 257 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN, 258 SUSBCR_MSC_GetFWVersion, 259 0, 260 transfer_buffer, 261 transfer_buffer_length, 262 KOBIL_TIMEOUT 263 ); 264 dev_dbg(dev, "%s - Send get_FW_version URB returns: %i\n", __func__, result); 265 dev_dbg(dev, "Firmware version: %i.%i.%i\n", transfer_buffer[0], 266 transfer_buffer[1], transfer_buffer[2]); 267 268 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || 269 priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) { 270 /* Setting Baudrate, Parity and Stopbits */ 271 result = usb_control_msg(port->serial->dev, 272 usb_rcvctrlpipe(port->serial->dev, 0), 273 SUSBCRequest_SetBaudRateParityAndStopBits, 274 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 275 SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity | 276 SUSBCR_SPASB_1StopBit, 277 0, 278 transfer_buffer, 279 0, 280 KOBIL_TIMEOUT 281 ); 282 dev_dbg(dev, "%s - Send set_baudrate URB returns: %i\n", __func__, result); 283 284 /* reset all queues */ 285 result = usb_control_msg(port->serial->dev, 286 usb_rcvctrlpipe(port->serial->dev, 0), 287 SUSBCRequest_Misc, 288 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 289 SUSBCR_MSC_ResetAllQueues, 290 0, 291 transfer_buffer, 292 0, 293 KOBIL_TIMEOUT 294 ); 295 dev_dbg(dev, "%s - Send reset_all_queues URB returns: %i\n", __func__, result); 296 } 297 if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || 298 priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || 299 priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { 300 /* start reading (Adapter B 'cause PNP string) */ 301 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); 302 dev_dbg(dev, "%s - Send read URB returns: %i\n", __func__, result); 303 } 304 305 kfree(transfer_buffer); 306 return 0; 307 } 308 309 310 static void kobil_close(struct usb_serial_port *port) 311 { 312 /* FIXME: Add rts/dtr methods */ 313 if (port->write_urb) { 314 usb_poison_urb(port->write_urb); 315 kfree(port->write_urb->transfer_buffer); 316 usb_free_urb(port->write_urb); 317 port->write_urb = NULL; 318 } 319 usb_kill_urb(port->interrupt_in_urb); 320 } 321 322 323 static void kobil_read_int_callback(struct urb *urb) 324 { 325 int result; 326 struct usb_serial_port *port = urb->context; 327 unsigned char *data = urb->transfer_buffer; 328 int status = urb->status; 329 330 if (status) { 331 dev_dbg(&port->dev, "%s - Read int status not zero: %d\n", __func__, status); 332 return; 333 } 334 335 if (urb->actual_length) { 336 337 /* BEGIN DEBUG */ 338 /* 339 char *dbg_data; 340 341 dbg_data = kzalloc((3 * purb->actual_length + 10) 342 * sizeof(char), GFP_KERNEL); 343 if (! dbg_data) { 344 return; 345 } 346 for (i = 0; i < purb->actual_length; i++) { 347 sprintf(dbg_data +3*i, "%02X ", data[i]); 348 } 349 dev_dbg(&port->dev, " <-- %s\n", dbg_data); 350 kfree(dbg_data); 351 */ 352 /* END DEBUG */ 353 354 tty_insert_flip_string(&port->port, data, urb->actual_length); 355 tty_flip_buffer_push(&port->port); 356 } 357 358 result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC); 359 dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result); 360 } 361 362 363 static void kobil_write_callback(struct urb *purb) 364 { 365 } 366 367 368 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port, 369 const unsigned char *buf, int count) 370 { 371 int length = 0; 372 int result = 0; 373 int todo = 0; 374 struct kobil_private *priv; 375 376 if (count == 0) { 377 dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__); 378 return 0; 379 } 380 381 priv = usb_get_serial_port_data(port); 382 383 if (count > (KOBIL_BUF_LENGTH - priv->filled)) { 384 dev_dbg(&port->dev, "%s - Error: write request bigger than buffer size\n", __func__); 385 return -ENOMEM; 386 } 387 388 /* Copy data to buffer */ 389 memcpy(priv->buf + priv->filled, buf, count); 390 usb_serial_debug_data(&port->dev, __func__, count, priv->buf + priv->filled); 391 priv->filled = priv->filled + count; 392 393 /* only send complete block. TWIN, KAAN SIM and adapter K 394 use the same protocol. */ 395 if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) || 396 ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) { 397 /* stop reading (except TWIN and KAAN SIM) */ 398 if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) 399 || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID)) 400 usb_kill_urb(port->interrupt_in_urb); 401 402 todo = priv->filled - priv->cur_pos; 403 404 while (todo > 0) { 405 /* max 8 byte in one urb (endpoint size) */ 406 length = (todo < 8) ? todo : 8; 407 /* copy data to transfer buffer */ 408 memcpy(port->write_urb->transfer_buffer, 409 priv->buf + priv->cur_pos, length); 410 usb_fill_int_urb(port->write_urb, 411 port->serial->dev, 412 usb_sndintpipe(port->serial->dev, 413 priv->write_int_endpoint_address), 414 port->write_urb->transfer_buffer, 415 length, 416 kobil_write_callback, 417 port, 418 8 419 ); 420 421 priv->cur_pos = priv->cur_pos + length; 422 result = usb_submit_urb(port->write_urb, GFP_NOIO); 423 dev_dbg(&port->dev, "%s - Send write URB returns: %i\n", __func__, result); 424 todo = priv->filled - priv->cur_pos; 425 426 if (todo > 0) 427 msleep(24); 428 } 429 430 priv->filled = 0; 431 priv->cur_pos = 0; 432 433 /* start reading (except TWIN and KAAN SIM) */ 434 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || 435 priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) { 436 result = usb_submit_urb(port->interrupt_in_urb, 437 GFP_NOIO); 438 dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result); 439 } 440 } 441 return count; 442 } 443 444 445 static int kobil_write_room(struct tty_struct *tty) 446 { 447 /* FIXME */ 448 return 8; 449 } 450 451 452 static int kobil_tiocmget(struct tty_struct *tty) 453 { 454 struct usb_serial_port *port = tty->driver_data; 455 struct kobil_private *priv; 456 int result; 457 unsigned char *transfer_buffer; 458 int transfer_buffer_length = 8; 459 460 priv = usb_get_serial_port_data(port); 461 if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID 462 || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { 463 /* This device doesn't support ioctl calls */ 464 return -EINVAL; 465 } 466 467 /* allocate memory for transfer buffer */ 468 transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL); 469 if (!transfer_buffer) 470 return -ENOMEM; 471 472 result = usb_control_msg(port->serial->dev, 473 usb_rcvctrlpipe(port->serial->dev, 0), 474 SUSBCRequest_GetStatusLineState, 475 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN, 476 0, 477 0, 478 transfer_buffer, 479 transfer_buffer_length, 480 KOBIL_TIMEOUT); 481 482 dev_dbg(&port->dev, "%s - Send get_status_line_state URB returns: %i. Statusline: %02x\n", 483 __func__, result, transfer_buffer[0]); 484 485 result = 0; 486 if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) 487 result = TIOCM_DSR; 488 kfree(transfer_buffer); 489 return result; 490 } 491 492 static int kobil_tiocmset(struct tty_struct *tty, 493 unsigned int set, unsigned int clear) 494 { 495 struct usb_serial_port *port = tty->driver_data; 496 struct device *dev = &port->dev; 497 struct kobil_private *priv; 498 int result; 499 int dtr = 0; 500 int rts = 0; 501 unsigned char *transfer_buffer; 502 int transfer_buffer_length = 8; 503 504 /* FIXME: locking ? */ 505 priv = usb_get_serial_port_data(port); 506 if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID 507 || priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { 508 /* This device doesn't support ioctl calls */ 509 return -EINVAL; 510 } 511 512 /* allocate memory for transfer buffer */ 513 transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL); 514 if (!transfer_buffer) 515 return -ENOMEM; 516 517 if (set & TIOCM_RTS) 518 rts = 1; 519 if (set & TIOCM_DTR) 520 dtr = 1; 521 if (clear & TIOCM_RTS) 522 rts = 0; 523 if (clear & TIOCM_DTR) 524 dtr = 0; 525 526 if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) { 527 if (dtr != 0) 528 dev_dbg(dev, "%s - Setting DTR\n", __func__); 529 else 530 dev_dbg(dev, "%s - Clearing DTR\n", __func__); 531 result = usb_control_msg(port->serial->dev, 532 usb_rcvctrlpipe(port->serial->dev, 0), 533 SUSBCRequest_SetStatusLinesOrQueues, 534 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 535 ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR), 536 0, 537 transfer_buffer, 538 0, 539 KOBIL_TIMEOUT); 540 } else { 541 if (rts != 0) 542 dev_dbg(dev, "%s - Setting RTS\n", __func__); 543 else 544 dev_dbg(dev, "%s - Clearing RTS\n", __func__); 545 result = usb_control_msg(port->serial->dev, 546 usb_rcvctrlpipe(port->serial->dev, 0), 547 SUSBCRequest_SetStatusLinesOrQueues, 548 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 549 ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS), 550 0, 551 transfer_buffer, 552 0, 553 KOBIL_TIMEOUT); 554 } 555 dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result); 556 kfree(transfer_buffer); 557 return (result < 0) ? result : 0; 558 } 559 560 static void kobil_set_termios(struct tty_struct *tty, 561 struct usb_serial_port *port, struct ktermios *old) 562 { 563 struct kobil_private *priv; 564 int result; 565 unsigned short urb_val = 0; 566 int c_cflag = tty->termios.c_cflag; 567 speed_t speed; 568 569 priv = usb_get_serial_port_data(port); 570 if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || 571 priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) { 572 /* This device doesn't support ioctl calls */ 573 tty_termios_copy_hw(&tty->termios, old); 574 return; 575 } 576 577 speed = tty_get_baud_rate(tty); 578 switch (speed) { 579 case 1200: 580 urb_val = SUSBCR_SBR_1200; 581 break; 582 default: 583 speed = 9600; 584 case 9600: 585 urb_val = SUSBCR_SBR_9600; 586 break; 587 } 588 urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : 589 SUSBCR_SPASB_1StopBit; 590 if (c_cflag & PARENB) { 591 if (c_cflag & PARODD) 592 urb_val |= SUSBCR_SPASB_OddParity; 593 else 594 urb_val |= SUSBCR_SPASB_EvenParity; 595 } else 596 urb_val |= SUSBCR_SPASB_NoParity; 597 tty->termios.c_cflag &= ~CMSPAR; 598 tty_encode_baud_rate(tty, speed, speed); 599 600 result = usb_control_msg(port->serial->dev, 601 usb_rcvctrlpipe(port->serial->dev, 0), 602 SUSBCRequest_SetBaudRateParityAndStopBits, 603 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 604 urb_val, 605 0, 606 NULL, 607 0, 608 KOBIL_TIMEOUT 609 ); 610 } 611 612 static int kobil_ioctl(struct tty_struct *tty, 613 unsigned int cmd, unsigned long arg) 614 { 615 struct usb_serial_port *port = tty->driver_data; 616 struct kobil_private *priv = usb_get_serial_port_data(port); 617 unsigned char *transfer_buffer; 618 int transfer_buffer_length = 8; 619 int result; 620 621 if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || 622 priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) 623 /* This device doesn't support ioctl calls */ 624 return -ENOIOCTLCMD; 625 626 switch (cmd) { 627 case TCFLSH: 628 transfer_buffer = kmalloc(transfer_buffer_length, GFP_KERNEL); 629 if (!transfer_buffer) 630 return -ENOBUFS; 631 632 result = usb_control_msg(port->serial->dev, 633 usb_rcvctrlpipe(port->serial->dev, 0), 634 SUSBCRequest_Misc, 635 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, 636 SUSBCR_MSC_ResetAllQueues, 637 0, 638 NULL, /* transfer_buffer, */ 639 0, 640 KOBIL_TIMEOUT 641 ); 642 643 dev_dbg(&port->dev, 644 "%s - Send reset_all_queues (FLUSH) URB returns: %i", __func__, result); 645 kfree(transfer_buffer); 646 return (result < 0) ? -EIO: 0; 647 default: 648 return -ENOIOCTLCMD; 649 } 650 } 651 652 module_usb_serial_driver(serial_drivers, id_table); 653 654 MODULE_AUTHOR(DRIVER_AUTHOR); 655 MODULE_DESCRIPTION(DRIVER_DESC); 656 MODULE_LICENSE("GPL"); 657