xref: /openbmc/linux/drivers/usb/serial/kobil_sct.c (revision f6d47fe5)
1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3  *  KOBIL USB Smart Card Terminal Driver
4  *
5  *  Copyright (C) 2002  KOBIL Systems GmbH
6  *  Author: Thomas Wahrenbruch
7  *
8  *  Contact: linuxusb@kobil.de
9  *
10  *  This program is largely derived from work by the linux-usb group
11  *  and associated source files.  Please see the usb/serial files for
12  *  individual credits and copyrights.
13  *
14  *  Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
15  *  patience.
16  *
17  * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
18  * (Adapter K), B1 Professional and KAAN Professional (Adapter B)
19  */
20 
21 
22 #include <linux/kernel.h>
23 #include <linux/errno.h>
24 #include <linux/slab.h>
25 #include <linux/tty.h>
26 #include <linux/tty_driver.h>
27 #include <linux/tty_flip.h>
28 #include <linux/module.h>
29 #include <linux/spinlock.h>
30 #include <linux/uaccess.h>
31 #include <linux/usb.h>
32 #include <linux/usb/serial.h>
33 #include <linux/ioctl.h>
34 #include "kobil_sct.h"
35 
36 #define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
37 #define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"
38 
39 #define KOBIL_VENDOR_ID			0x0D46
40 #define KOBIL_ADAPTER_B_PRODUCT_ID	0x2011
41 #define KOBIL_ADAPTER_K_PRODUCT_ID	0x2012
42 #define KOBIL_USBTWIN_PRODUCT_ID	0x0078
43 #define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081
44 
45 #define KOBIL_TIMEOUT		500
46 #define KOBIL_BUF_LENGTH	300
47 
48 
49 /* Function prototypes */
50 static int kobil_port_probe(struct usb_serial_port *probe);
51 static void kobil_port_remove(struct usb_serial_port *probe);
52 static int  kobil_open(struct tty_struct *tty, struct usb_serial_port *port);
53 static void kobil_close(struct usb_serial_port *port);
54 static int  kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
55 			 const unsigned char *buf, int count);
56 static unsigned int kobil_write_room(struct tty_struct *tty);
57 static int  kobil_ioctl(struct tty_struct *tty,
58 			unsigned int cmd, unsigned long arg);
59 static int  kobil_tiocmget(struct tty_struct *tty);
60 static int  kobil_tiocmset(struct tty_struct *tty,
61 			   unsigned int set, unsigned int clear);
62 static void kobil_read_int_callback(struct urb *urb);
63 static void kobil_write_int_callback(struct urb *urb);
64 static void kobil_set_termios(struct tty_struct *tty,
65 			      struct usb_serial_port *port,
66 			      const struct ktermios *old);
67 static void kobil_init_termios(struct tty_struct *tty);
68 
69 static const struct usb_device_id id_table[] = {
70 	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
71 	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
72 	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
73 	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
74 	{ }			/* Terminating entry */
75 };
76 MODULE_DEVICE_TABLE(usb, id_table);
77 
78 static struct usb_serial_driver kobil_device = {
79 	.driver = {
80 		.owner =	THIS_MODULE,
81 		.name =		"kobil",
82 	},
83 	.description =		"KOBIL USB smart card terminal",
84 	.id_table =		id_table,
85 	.num_ports =		1,
86 	.num_interrupt_out =	1,
87 	.port_probe =		kobil_port_probe,
88 	.port_remove =		kobil_port_remove,
89 	.ioctl =		kobil_ioctl,
90 	.set_termios =		kobil_set_termios,
91 	.init_termios =		kobil_init_termios,
92 	.tiocmget =		kobil_tiocmget,
93 	.tiocmset =		kobil_tiocmset,
94 	.open =			kobil_open,
95 	.close =		kobil_close,
96 	.write =		kobil_write,
97 	.write_room =		kobil_write_room,
98 	.read_int_callback =	kobil_read_int_callback,
99 	.write_int_callback =	kobil_write_int_callback,
100 };
101 
102 static struct usb_serial_driver * const serial_drivers[] = {
103 	&kobil_device, NULL
104 };
105 
106 struct kobil_private {
107 	unsigned char buf[KOBIL_BUF_LENGTH]; /* buffer for the APDU to send */
108 	int filled;  /* index of the last char in buf */
109 	int cur_pos; /* index of the next char to send in buf */
110 	__u16 device_type;
111 };
112 
113 
kobil_port_probe(struct usb_serial_port * port)114 static int kobil_port_probe(struct usb_serial_port *port)
115 {
116 	struct usb_serial *serial = port->serial;
117 	struct kobil_private *priv;
118 
119 	priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
120 	if (!priv)
121 		return -ENOMEM;
122 
123 	priv->filled = 0;
124 	priv->cur_pos = 0;
125 	priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
126 
127 	switch (priv->device_type) {
128 	case KOBIL_ADAPTER_B_PRODUCT_ID:
129 		dev_dbg(&serial->dev->dev, "KOBIL B1 PRO / KAAN PRO detected\n");
130 		break;
131 	case KOBIL_ADAPTER_K_PRODUCT_ID:
132 		dev_dbg(&serial->dev->dev, "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
133 		break;
134 	case KOBIL_USBTWIN_PRODUCT_ID:
135 		dev_dbg(&serial->dev->dev, "KOBIL USBTWIN detected\n");
136 		break;
137 	case KOBIL_KAAN_SIM_PRODUCT_ID:
138 		dev_dbg(&serial->dev->dev, "KOBIL KAAN SIM detected\n");
139 		break;
140 	}
141 	usb_set_serial_port_data(port, priv);
142 
143 	return 0;
144 }
145 
146 
kobil_port_remove(struct usb_serial_port * port)147 static void kobil_port_remove(struct usb_serial_port *port)
148 {
149 	struct kobil_private *priv;
150 
151 	priv = usb_get_serial_port_data(port);
152 	kfree(priv);
153 }
154 
kobil_init_termios(struct tty_struct * tty)155 static void kobil_init_termios(struct tty_struct *tty)
156 {
157 	/* Default to echo off and other sane device settings */
158 	tty->termios.c_lflag = 0;
159 	tty->termios.c_iflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
160 	tty->termios.c_iflag |= IGNBRK | IGNPAR | IXOFF;
161 	/* do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D) */
162 	tty->termios.c_oflag &= ~ONLCR;
163 }
164 
kobil_open(struct tty_struct * tty,struct usb_serial_port * port)165 static int kobil_open(struct tty_struct *tty, struct usb_serial_port *port)
166 {
167 	struct device *dev = &port->dev;
168 	int result = 0;
169 	struct kobil_private *priv;
170 	unsigned char *transfer_buffer;
171 	int transfer_buffer_length = 8;
172 
173 	priv = usb_get_serial_port_data(port);
174 
175 	/* allocate memory for transfer buffer */
176 	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
177 	if (!transfer_buffer)
178 		return -ENOMEM;
179 
180 	/* get hardware version */
181 	result = usb_control_msg(port->serial->dev,
182 			  usb_rcvctrlpipe(port->serial->dev, 0),
183 			  SUSBCRequest_GetMisc,
184 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
185 			  SUSBCR_MSC_GetHWVersion,
186 			  0,
187 			  transfer_buffer,
188 			  transfer_buffer_length,
189 			  KOBIL_TIMEOUT
190 	);
191 	dev_dbg(dev, "%s - Send get_HW_version URB returns: %i\n", __func__, result);
192 	if (result >= 3) {
193 		dev_dbg(dev, "Hardware version: %i.%i.%i\n", transfer_buffer[0],
194 				transfer_buffer[1], transfer_buffer[2]);
195 	}
196 
197 	/* get firmware version */
198 	result = usb_control_msg(port->serial->dev,
199 			  usb_rcvctrlpipe(port->serial->dev, 0),
200 			  SUSBCRequest_GetMisc,
201 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
202 			  SUSBCR_MSC_GetFWVersion,
203 			  0,
204 			  transfer_buffer,
205 			  transfer_buffer_length,
206 			  KOBIL_TIMEOUT
207 	);
208 	dev_dbg(dev, "%s - Send get_FW_version URB returns: %i\n", __func__, result);
209 	if (result >= 3) {
210 		dev_dbg(dev, "Firmware version: %i.%i.%i\n", transfer_buffer[0],
211 				transfer_buffer[1], transfer_buffer[2]);
212 	}
213 
214 	if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
215 			priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
216 		/* Setting Baudrate, Parity and Stopbits */
217 		result = usb_control_msg(port->serial->dev,
218 			  usb_sndctrlpipe(port->serial->dev, 0),
219 			  SUSBCRequest_SetBaudRateParityAndStopBits,
220 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
221 			  SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity |
222 							SUSBCR_SPASB_1StopBit,
223 			  0,
224 			  NULL,
225 			  0,
226 			  KOBIL_TIMEOUT
227 		);
228 		dev_dbg(dev, "%s - Send set_baudrate URB returns: %i\n", __func__, result);
229 
230 		/* reset all queues */
231 		result = usb_control_msg(port->serial->dev,
232 			  usb_sndctrlpipe(port->serial->dev, 0),
233 			  SUSBCRequest_Misc,
234 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
235 			  SUSBCR_MSC_ResetAllQueues,
236 			  0,
237 			  NULL,
238 			  0,
239 			  KOBIL_TIMEOUT
240 		);
241 		dev_dbg(dev, "%s - Send reset_all_queues URB returns: %i\n", __func__, result);
242 	}
243 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
244 	    priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
245 	    priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
246 		/* start reading (Adapter B 'cause PNP string) */
247 		result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
248 		dev_dbg(dev, "%s - Send read URB returns: %i\n", __func__, result);
249 	}
250 
251 	kfree(transfer_buffer);
252 	return 0;
253 }
254 
255 
kobil_close(struct usb_serial_port * port)256 static void kobil_close(struct usb_serial_port *port)
257 {
258 	/* FIXME: Add rts/dtr methods */
259 	usb_kill_urb(port->interrupt_out_urb);
260 	usb_kill_urb(port->interrupt_in_urb);
261 }
262 
263 
kobil_read_int_callback(struct urb * urb)264 static void kobil_read_int_callback(struct urb *urb)
265 {
266 	int result;
267 	struct usb_serial_port *port = urb->context;
268 	unsigned char *data = urb->transfer_buffer;
269 	int status = urb->status;
270 
271 	if (status) {
272 		dev_dbg(&port->dev, "%s - Read int status not zero: %d\n", __func__, status);
273 		return;
274 	}
275 
276 	if (urb->actual_length) {
277 		usb_serial_debug_data(&port->dev, __func__, urb->actual_length,
278 									data);
279 		tty_insert_flip_string(&port->port, data, urb->actual_length);
280 		tty_flip_buffer_push(&port->port);
281 	}
282 
283 	result = usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC);
284 	dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
285 }
286 
287 
kobil_write_int_callback(struct urb * urb)288 static void kobil_write_int_callback(struct urb *urb)
289 {
290 }
291 
292 
kobil_write(struct tty_struct * tty,struct usb_serial_port * port,const unsigned char * buf,int count)293 static int kobil_write(struct tty_struct *tty, struct usb_serial_port *port,
294 			const unsigned char *buf, int count)
295 {
296 	int length = 0;
297 	int result = 0;
298 	int todo = 0;
299 	struct kobil_private *priv;
300 
301 	if (count == 0) {
302 		dev_dbg(&port->dev, "%s - write request of 0 bytes\n", __func__);
303 		return 0;
304 	}
305 
306 	priv = usb_get_serial_port_data(port);
307 
308 	if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
309 		dev_dbg(&port->dev, "%s - Error: write request bigger than buffer size\n", __func__);
310 		return -ENOMEM;
311 	}
312 
313 	/* Copy data to buffer */
314 	memcpy(priv->buf + priv->filled, buf, count);
315 	usb_serial_debug_data(&port->dev, __func__, count, priv->buf + priv->filled);
316 	priv->filled = priv->filled + count;
317 
318 	/* only send complete block. TWIN, KAAN SIM and adapter K
319 	   use the same protocol. */
320 	if (((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) ||
321 	     ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4)))) {
322 		/* stop reading (except TWIN and KAAN SIM) */
323 		if ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID)
324 			|| (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID))
325 			usb_kill_urb(port->interrupt_in_urb);
326 
327 		todo = priv->filled - priv->cur_pos;
328 
329 		while (todo > 0) {
330 			/* max 8 byte in one urb (endpoint size) */
331 			length = min(todo, port->interrupt_out_size);
332 			/* copy data to transfer buffer */
333 			memcpy(port->interrupt_out_buffer,
334 					priv->buf + priv->cur_pos, length);
335 			port->interrupt_out_urb->transfer_buffer_length = length;
336 
337 			priv->cur_pos = priv->cur_pos + length;
338 			result = usb_submit_urb(port->interrupt_out_urb,
339 					GFP_ATOMIC);
340 			dev_dbg(&port->dev, "%s - Send write URB returns: %i\n", __func__, result);
341 			todo = priv->filled - priv->cur_pos;
342 
343 			if (todo > 0)
344 				msleep(24);
345 		}
346 
347 		priv->filled = 0;
348 		priv->cur_pos = 0;
349 
350 		/* start reading (except TWIN and KAAN SIM) */
351 		if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
352 			priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
353 			result = usb_submit_urb(port->interrupt_in_urb,
354 					GFP_ATOMIC);
355 			dev_dbg(&port->dev, "%s - Send read URB returns: %i\n", __func__, result);
356 		}
357 	}
358 	return count;
359 }
360 
361 
kobil_write_room(struct tty_struct * tty)362 static unsigned int kobil_write_room(struct tty_struct *tty)
363 {
364 	/* FIXME */
365 	return 8;
366 }
367 
368 
kobil_tiocmget(struct tty_struct * tty)369 static int kobil_tiocmget(struct tty_struct *tty)
370 {
371 	struct usb_serial_port *port = tty->driver_data;
372 	struct kobil_private *priv;
373 	int result;
374 	unsigned char *transfer_buffer;
375 	int transfer_buffer_length = 8;
376 
377 	priv = usb_get_serial_port_data(port);
378 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
379 			|| priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
380 		/* This device doesn't support ioctl calls */
381 		return -EINVAL;
382 	}
383 
384 	/* allocate memory for transfer buffer */
385 	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
386 	if (!transfer_buffer)
387 		return -ENOMEM;
388 
389 	result = usb_control_msg(port->serial->dev,
390 			  usb_rcvctrlpipe(port->serial->dev, 0),
391 			  SUSBCRequest_GetStatusLineState,
392 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
393 			  0,
394 			  0,
395 			  transfer_buffer,
396 			  transfer_buffer_length,
397 			  KOBIL_TIMEOUT);
398 
399 	dev_dbg(&port->dev, "Send get_status_line_state URB returns: %i\n",
400 			result);
401 	if (result < 1) {
402 		if (result >= 0)
403 			result = -EIO;
404 		goto out_free;
405 	}
406 
407 	dev_dbg(&port->dev, "Statusline: %02x\n", transfer_buffer[0]);
408 
409 	result = 0;
410 	if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0)
411 		result = TIOCM_DSR;
412 out_free:
413 	kfree(transfer_buffer);
414 	return result;
415 }
416 
kobil_tiocmset(struct tty_struct * tty,unsigned int set,unsigned int clear)417 static int kobil_tiocmset(struct tty_struct *tty,
418 			   unsigned int set, unsigned int clear)
419 {
420 	struct usb_serial_port *port = tty->driver_data;
421 	struct device *dev = &port->dev;
422 	struct kobil_private *priv;
423 	int result;
424 	int dtr = 0;
425 	int rts = 0;
426 
427 	/* FIXME: locking ? */
428 	priv = usb_get_serial_port_data(port);
429 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID
430 		|| priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
431 		/* This device doesn't support ioctl calls */
432 		return -EINVAL;
433 	}
434 
435 	if (set & TIOCM_RTS)
436 		rts = 1;
437 	if (set & TIOCM_DTR)
438 		dtr = 1;
439 	if (clear & TIOCM_RTS)
440 		rts = 0;
441 	if (clear & TIOCM_DTR)
442 		dtr = 0;
443 
444 	if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
445 		if (dtr != 0)
446 			dev_dbg(dev, "%s - Setting DTR\n", __func__);
447 		else
448 			dev_dbg(dev, "%s - Clearing DTR\n", __func__);
449 		result = usb_control_msg(port->serial->dev,
450 			  usb_sndctrlpipe(port->serial->dev, 0),
451 			  SUSBCRequest_SetStatusLinesOrQueues,
452 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
453 			  ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
454 			  0,
455 			  NULL,
456 			  0,
457 			  KOBIL_TIMEOUT);
458 	} else {
459 		if (rts != 0)
460 			dev_dbg(dev, "%s - Setting RTS\n", __func__);
461 		else
462 			dev_dbg(dev, "%s - Clearing RTS\n", __func__);
463 		result = usb_control_msg(port->serial->dev,
464 			usb_sndctrlpipe(port->serial->dev, 0),
465 			SUSBCRequest_SetStatusLinesOrQueues,
466 			USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
467 			((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
468 			0,
469 			NULL,
470 			0,
471 			KOBIL_TIMEOUT);
472 	}
473 	dev_dbg(dev, "%s - Send set_status_line URB returns: %i\n", __func__, result);
474 	return (result < 0) ? result : 0;
475 }
476 
kobil_set_termios(struct tty_struct * tty,struct usb_serial_port * port,const struct ktermios * old)477 static void kobil_set_termios(struct tty_struct *tty,
478 			      struct usb_serial_port *port,
479 			      const struct ktermios *old)
480 {
481 	struct kobil_private *priv;
482 	int result;
483 	unsigned short urb_val = 0;
484 	int c_cflag = tty->termios.c_cflag;
485 	speed_t speed;
486 
487 	priv = usb_get_serial_port_data(port);
488 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
489 			priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
490 		/* This device doesn't support ioctl calls */
491 		tty_termios_copy_hw(&tty->termios, old);
492 		return;
493 	}
494 
495 	speed = tty_get_baud_rate(tty);
496 	switch (speed) {
497 	case 1200:
498 		urb_val = SUSBCR_SBR_1200;
499 		break;
500 	default:
501 		speed = 9600;
502 		fallthrough;
503 	case 9600:
504 		urb_val = SUSBCR_SBR_9600;
505 		break;
506 	}
507 	urb_val |= (c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits :
508 							SUSBCR_SPASB_1StopBit;
509 	if (c_cflag & PARENB) {
510 		if  (c_cflag & PARODD)
511 			urb_val |= SUSBCR_SPASB_OddParity;
512 		else
513 			urb_val |= SUSBCR_SPASB_EvenParity;
514 	} else
515 		urb_val |= SUSBCR_SPASB_NoParity;
516 	tty->termios.c_cflag &= ~CMSPAR;
517 	tty_encode_baud_rate(tty, speed, speed);
518 
519 	result = usb_control_msg(port->serial->dev,
520 		  usb_sndctrlpipe(port->serial->dev, 0),
521 		  SUSBCRequest_SetBaudRateParityAndStopBits,
522 		  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
523 		  urb_val,
524 		  0,
525 		  NULL,
526 		  0,
527 		  KOBIL_TIMEOUT
528 		);
529 	if (result) {
530 		dev_err(&port->dev, "failed to update line settings: %d\n",
531 				result);
532 	}
533 }
534 
kobil_ioctl(struct tty_struct * tty,unsigned int cmd,unsigned long arg)535 static int kobil_ioctl(struct tty_struct *tty,
536 					unsigned int cmd, unsigned long arg)
537 {
538 	struct usb_serial_port *port = tty->driver_data;
539 	struct kobil_private *priv = usb_get_serial_port_data(port);
540 	int result;
541 
542 	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID ||
543 			priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)
544 		/* This device doesn't support ioctl calls */
545 		return -ENOIOCTLCMD;
546 
547 	switch (cmd) {
548 	case TCFLSH:
549 		result = usb_control_msg(port->serial->dev,
550 			  usb_sndctrlpipe(port->serial->dev, 0),
551 			  SUSBCRequest_Misc,
552 			  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
553 			  SUSBCR_MSC_ResetAllQueues,
554 			  0,
555 			  NULL,
556 			  0,
557 			  KOBIL_TIMEOUT
558 			);
559 
560 		dev_dbg(&port->dev,
561 			"%s - Send reset_all_queues (FLUSH) URB returns: %i\n",
562 			__func__, result);
563 		return (result < 0) ? -EIO: 0;
564 	default:
565 		return -ENOIOCTLCMD;
566 	}
567 }
568 
569 module_usb_serial_driver(serial_drivers, id_table);
570 
571 MODULE_AUTHOR(DRIVER_AUTHOR);
572 MODULE_DESCRIPTION(DRIVER_DESC);
573 MODULE_LICENSE("GPL");
574