summaryrefslogtreecommitdiffstats
path: root/drivers/usb/serial/kobil_sct.c
blob: 87dfcd89ffabf44316fefa86d18cf4ecb1f077ce (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
/*
 *  KOBIL USB Smart Card Terminal Driver
 *
 *  Copyright (C) 2002  KOBIL Systems GmbH 
 *  Author: Thomas Wahrenbruch
 *
 *  Contact: linuxusb@kobil.de
 *
 *  This program is largely derived from work by the linux-usb group
 *  and associated source files.  Please see the usb/serial files for
 *  individual credits and copyrights.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  Thanks to Greg Kroah-Hartman (greg@kroah.com) for his help and
 *  patience.
 *
 * Supported readers: USB TWIN, KAAN Standard Plus and SecOVID Reader Plus
 * (Adapter K), B1 Professional and KAAN Professional (Adapter B)
 * 
 * (21/05/2004) tw
 *      Fix bug with P'n'P readers
 *
 * (28/05/2003) tw
 *      Add support for KAAN SIM
 *
 * (12/09/2002) tw
 *      Adapted to 2.5.
 *
 * (11/08/2002) tw
 *      Initial version.
 */


#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/tty.h>
#include <linux/tty_driver.h>
#include <linux/tty_flip.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <asm/uaccess.h>
#include <linux/usb.h>
#include <linux/ioctl.h>
#include "usb-serial.h"
#include "kobil_sct.h"

static int debug;

/* Version Information */
#define DRIVER_VERSION "21/05/2004"
#define DRIVER_AUTHOR "KOBIL Systems GmbH - http://www.kobil.com"
#define DRIVER_DESC "KOBIL USB Smart Card Terminal Driver (experimental)"

#define KOBIL_VENDOR_ID			0x0D46
#define KOBIL_ADAPTER_B_PRODUCT_ID	0x2011
#define KOBIL_ADAPTER_K_PRODUCT_ID	0x2012
#define KOBIL_USBTWIN_PRODUCT_ID	0x0078
#define KOBIL_KAAN_SIM_PRODUCT_ID       0x0081

#define KOBIL_TIMEOUT		500
#define KOBIL_BUF_LENGTH	300


/* Function prototypes */
static int  kobil_startup (struct usb_serial *serial);
static void kobil_shutdown (struct usb_serial *serial);
static int  kobil_open (struct usb_serial_port *port, struct file *filp);
static void kobil_close (struct usb_serial_port *port, struct file *filp);
static int  kobil_write (struct usb_serial_port *port, 
			 const unsigned char *buf, int count);
static int  kobil_write_room(struct usb_serial_port *port);
static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg);
static int  kobil_tiocmget(struct usb_serial_port *port, struct file *file);
static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
			   unsigned int set, unsigned int clear);
static void kobil_read_int_callback( struct urb *urb, struct pt_regs *regs );
static void kobil_write_callback( struct urb *purb, struct pt_regs *regs );


static struct usb_device_id id_table [] = {
	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_B_PRODUCT_ID) },
	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_ADAPTER_K_PRODUCT_ID) },
	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_USBTWIN_PRODUCT_ID) },
	{ USB_DEVICE(KOBIL_VENDOR_ID, KOBIL_KAAN_SIM_PRODUCT_ID) },
	{ }			/* Terminating entry */
};


MODULE_DEVICE_TABLE (usb, id_table);

static struct usb_driver kobil_driver = {
	.name =		"kobil",
	.probe =	usb_serial_probe,
	.disconnect =	usb_serial_disconnect,
	.id_table =	id_table,
	.no_dynamic_id = 	1,
};


static struct usb_serial_driver kobil_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"kobil",
	},
	.description =		"KOBIL USB smart card terminal",
	.id_table =		id_table,
	.num_interrupt_in =	NUM_DONT_CARE,
	.num_bulk_in =		0,
	.num_bulk_out =		0,
	.num_ports =		1,
	.attach =		kobil_startup,
	.shutdown =		kobil_shutdown,
	.ioctl =		kobil_ioctl,
	.tiocmget =		kobil_tiocmget,
	.tiocmset =		kobil_tiocmset,
	.open =			kobil_open,
	.close =		kobil_close,
	.write =		kobil_write,
	.write_room =		kobil_write_room,
	.read_int_callback =	kobil_read_int_callback,
};


struct kobil_private {
	int write_int_endpoint_address;
	int read_int_endpoint_address;
	unsigned char buf[KOBIL_BUF_LENGTH]; // buffer for the APDU to send
	int filled;  // index of the last char in buf
	int cur_pos; // index of the next char to send in buf
	__u16 device_type;
	int line_state;
	struct termios internal_termios;
};


static int kobil_startup (struct usb_serial *serial)
{
	int i;
	struct kobil_private *priv;
	struct usb_device *pdev;
	struct usb_host_config *actconfig;
	struct usb_interface *interface;
	struct usb_host_interface *altsetting;
	struct usb_host_endpoint *endpoint;

	priv = kmalloc(sizeof(struct kobil_private), GFP_KERNEL);
	if (!priv){
		return -ENOMEM;
	}

	priv->filled = 0;
	priv->cur_pos = 0;
	priv->device_type = le16_to_cpu(serial->dev->descriptor.idProduct);
	priv->line_state = 0;

	switch (priv->device_type){
	case KOBIL_ADAPTER_B_PRODUCT_ID:
		printk(KERN_DEBUG "KOBIL B1 PRO / KAAN PRO detected\n");
		break;
	case KOBIL_ADAPTER_K_PRODUCT_ID:
		printk(KERN_DEBUG "KOBIL KAAN Standard Plus / SecOVID Reader Plus detected\n");
		break;
	case KOBIL_USBTWIN_PRODUCT_ID:
		printk(KERN_DEBUG "KOBIL USBTWIN detected\n");
		break;
	case KOBIL_KAAN_SIM_PRODUCT_ID:
		printk(KERN_DEBUG "KOBIL KAAN SIM detected\n");
		break;
	}
	usb_set_serial_port_data(serial->port[0], priv);

	// search for the necessary endpoints
	pdev = serial->dev;
 	actconfig = pdev->actconfig;
 	interface = actconfig->interface[0];
	altsetting = interface->cur_altsetting;
 	endpoint = altsetting->endpoint;
  
 	for (i = 0; i < altsetting->desc.bNumEndpoints; i++) {
		endpoint = &altsetting->endpoint[i];
		if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_OUT) && 
 		    ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
		 	dbg("%s Found interrupt out endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
		 	priv->write_int_endpoint_address = endpoint->desc.bEndpointAddress;
 		}
 		if (((endpoint->desc.bEndpointAddress & USB_ENDPOINT_DIR_MASK) == USB_DIR_IN) && 
 		    ((endpoint->desc.bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT)) {
		 	dbg("%s Found interrupt in  endpoint. Address: %d", __FUNCTION__, endpoint->desc.bEndpointAddress);
		 	priv->read_int_endpoint_address = endpoint->desc.bEndpointAddress;
	 	}
	}
	return 0;
}


static void kobil_shutdown (struct usb_serial *serial)
{
	int i;
	dbg("%s - port %d", __FUNCTION__, serial->port[0]->number);

	for (i=0; i < serial->num_ports; ++i) {
		while (serial->port[i]->open_count > 0) {
			kobil_close (serial->port[i], NULL);
		}
		kfree(usb_get_serial_port_data(serial->port[i]));
		usb_set_serial_port_data(serial->port[i], NULL);
	}
}


static int kobil_open (struct usb_serial_port *port, struct file *filp)
{
	int i, result = 0;
	struct kobil_private *priv;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;
	int write_urb_transfer_buffer_length = 8;

	dbg("%s - port %d", __FUNCTION__, port->number);
	priv = usb_get_serial_port_data(port);
	priv->line_state = 0;

	// someone sets the dev to 0 if the close method has been called
	port->interrupt_in_urb->dev = port->serial->dev;


	/* force low_latency on so that our tty_push actually forces
	 * the data through, otherwise it is scheduled, and with high
	 * data rates (like with OHCI) data can get lost.
	 */
	port->tty->low_latency = 1;

	// without this, every push_tty_char is echoed :-(  
	port->tty->termios->c_lflag = 0;
	port->tty->termios->c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN | XCASE);
	port->tty->termios->c_iflag = IGNBRK | IGNPAR | IXOFF;
	port->tty->termios->c_oflag &= ~ONLCR; // do NOT translate CR to CR-NL (0x0A -> 0x0A 0x0D)
	
	// set up internal termios structure 
	priv->internal_termios.c_iflag = port->tty->termios->c_iflag;
	priv->internal_termios.c_oflag = port->tty->termios->c_oflag;
	priv->internal_termios.c_cflag = port->tty->termios->c_cflag;
	priv->internal_termios.c_lflag = port->tty->termios->c_lflag;

	for (i=0; i<NCCS; i++) {
		priv->internal_termios.c_cc[i] = port->tty->termios->c_cc[i];
	}
	
	// allocate memory for transfer buffer
	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
	if (! transfer_buffer) {
		return -ENOMEM;
	}
	
	// allocate write_urb
	if (!port->write_urb) { 
		dbg("%s - port %d  Allocating port->write_urb", __FUNCTION__, port->number);
		port->write_urb = usb_alloc_urb(0, GFP_KERNEL);  
		if (!port->write_urb) {
			dbg("%s - port %d usb_alloc_urb failed", __FUNCTION__, port->number);
			kfree(transfer_buffer);
			return -ENOMEM;
		}
	}

	// allocate memory for write_urb transfer buffer
	port->write_urb->transfer_buffer = (unsigned char *) kmalloc(write_urb_transfer_buffer_length, GFP_KERNEL);
	if (! port->write_urb->transfer_buffer) {
		kfree(transfer_buffer);
		usb_free_urb(port->write_urb);
		port->write_urb = NULL;
		return -ENOMEM;
	} 

	// get hardware version
	result = usb_control_msg( port->serial->dev, 
				  usb_rcvctrlpipe(port->serial->dev, 0 ), 
				  SUSBCRequest_GetMisc,
				  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
				  SUSBCR_MSC_GetHWVersion,
				  0,
				  transfer_buffer,
				  transfer_buffer_length,
				  KOBIL_TIMEOUT
		);
	dbg("%s - port %d Send get_HW_version URB returns: %i", __FUNCTION__, port->number, result);
	dbg("Harware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );
	
	// get firmware version
	result = usb_control_msg( port->serial->dev, 
				  usb_rcvctrlpipe(port->serial->dev, 0 ), 
				  SUSBCRequest_GetMisc,
				  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
				  SUSBCR_MSC_GetFWVersion,
				  0,
				  transfer_buffer,
				  transfer_buffer_length,
				  KOBIL_TIMEOUT
		);
	dbg("%s - port %d Send get_FW_version URB returns: %i", __FUNCTION__, port->number, result);
	dbg("Firmware version: %i.%i.%i", transfer_buffer[0], transfer_buffer[1], transfer_buffer[2] );

	if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) {
		// Setting Baudrate, Parity and Stopbits
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetBaudRateParityAndStopBits,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  SUSBCR_SBR_9600 | SUSBCR_SPASB_EvenParity | SUSBCR_SPASB_1StopBit,
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT
			);
		dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
		
		// reset all queues
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_Misc,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  SUSBCR_MSC_ResetAllQueues,
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT
			);
		dbg("%s - port %d Send reset_all_queues URB returns: %i", __FUNCTION__, port->number, result);
	}
	if (priv->device_type == KOBIL_USBTWIN_PRODUCT_ID || priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID ||
	    priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID) {
		// start reading (Adapter B 'cause PNP string)
		result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC  ); 
		dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
	}

	kfree(transfer_buffer);
	return 0;
}


static void kobil_close (struct usb_serial_port *port, struct file *filp)
{
	dbg("%s - port %d", __FUNCTION__, port->number);

	if (port->write_urb) {
		usb_kill_urb(port->write_urb);
		usb_free_urb( port->write_urb );
		port->write_urb = NULL;
	}
	if (port->interrupt_in_urb)
		usb_kill_urb(port->interrupt_in_urb);
}


static void kobil_read_int_callback( struct urb *purb, struct pt_regs *regs)
{
	int result;
	struct usb_serial_port *port = (struct usb_serial_port *) purb->context;
	struct tty_struct *tty;
	unsigned char *data = purb->transfer_buffer;
//	char *dbg_data;

	dbg("%s - port %d", __FUNCTION__, port->number);

	if (purb->status) {
		dbg("%s - port %d Read int status not zero: %d", __FUNCTION__, port->number, purb->status);
		return;
	}
	
	tty = port->tty; 
	if (purb->actual_length) {
		
		// BEGIN DEBUG
		/*
		  dbg_data = kzalloc((3 *  purb->actual_length + 10) * sizeof(char), GFP_KERNEL);
		  if (! dbg_data) {
		  return;
		  }
		  for (i = 0; i < purb->actual_length; i++) { 
		  sprintf(dbg_data +3*i, "%02X ", data[i]); 
		  }
		  dbg(" <-- %s", dbg_data );
		  kfree(dbg_data);
		*/
		// END DEBUG

		tty_buffer_request_room(tty, purb->actual_length);
		tty_insert_flip_string(tty, data, purb->actual_length);
		tty_flip_buffer_push(tty);
	}

	// someone sets the dev to 0 if the close method has been called
	port->interrupt_in_urb->dev = port->serial->dev;

	result = usb_submit_urb( port->interrupt_in_urb, GFP_ATOMIC ); 
	dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
}


static void kobil_write_callback( struct urb *purb, struct pt_regs *regs )
{
}


static int kobil_write (struct usb_serial_port *port, 
			const unsigned char *buf, int count)
{
	int length = 0;
	int result = 0;
	int todo = 0;
	struct kobil_private * priv;

	if (count == 0) {
		dbg("%s - port %d write request of 0 bytes", __FUNCTION__, port->number);
		return 0;
	}

	priv = usb_get_serial_port_data(port);

	if (count > (KOBIL_BUF_LENGTH - priv->filled)) {
		dbg("%s - port %d Error: write request bigger than buffer size", __FUNCTION__, port->number);
		return -ENOMEM;
	}

	// Copy data to buffer
	memcpy (priv->buf + priv->filled, buf, count);

	usb_serial_debug_data(debug, &port->dev, __FUNCTION__, count, priv->buf + priv->filled);

	priv->filled = priv->filled + count;


	// only send complete block. TWIN, KAAN SIM and adapter K use the same protocol.
	if ( ((priv->device_type != KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 2) && (priv->filled >= (priv->buf[1] + 3))) || 
	     ((priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) && (priv->filled > 3) && (priv->filled >= (priv->buf[2] + 4))) ) {
		
		// stop reading (except TWIN and KAAN SIM)
		if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) )
			usb_kill_urb(port->interrupt_in_urb);

		todo = priv->filled - priv->cur_pos;

		while(todo > 0) {
			// max 8 byte in one urb (endpoint size)
			length = (todo < 8) ? todo : 8;
			// copy data to transfer buffer
			memcpy(port->write_urb->transfer_buffer, priv->buf + priv->cur_pos, length );
			usb_fill_int_urb( port->write_urb,
					  port->serial->dev,
					  usb_sndintpipe(port->serial->dev, priv->write_int_endpoint_address),
					  port->write_urb->transfer_buffer,
					  length,
					  kobil_write_callback,
					  port,
					  8
				);

			priv->cur_pos = priv->cur_pos + length;
			result = usb_submit_urb( port->write_urb, GFP_NOIO );
			dbg("%s - port %d Send write URB returns: %i", __FUNCTION__, port->number, result);
			todo = priv->filled - priv->cur_pos;

			if (todo > 0) {
				msleep(24);
			}

		} // end while
		
		priv->filled = 0;
		priv->cur_pos = 0;

		// someone sets the dev to 0 if the close method has been called
		port->interrupt_in_urb->dev = port->serial->dev;
		
		// start reading (except TWIN and KAAN SIM)
		if ( (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) || (priv->device_type == KOBIL_ADAPTER_K_PRODUCT_ID) ) {
			// someone sets the dev to 0 if the close method has been called
			port->interrupt_in_urb->dev = port->serial->dev;
			
			result = usb_submit_urb( port->interrupt_in_urb, GFP_NOIO ); 
			dbg("%s - port %d Send read URB returns: %i", __FUNCTION__, port->number, result);
		}
	}
	return count;
}


static int kobil_write_room (struct usb_serial_port *port)
{
	//dbg("%s - port %d", __FUNCTION__, port->number);
	return 8;
}


static int kobil_tiocmget(struct usb_serial_port *port, struct file *file)
{
	struct kobil_private * priv;
	int result;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return -EINVAL;
	}

	// allocate memory for transfer buffer
	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
	if (!transfer_buffer) {
		return -ENOMEM;
	}

	result = usb_control_msg( port->serial->dev, 
				  usb_rcvctrlpipe(port->serial->dev, 0 ), 
				  SUSBCRequest_GetStatusLineState,
				  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_IN,
				  0,
				  0,
				  transfer_buffer,
				  transfer_buffer_length,
				  KOBIL_TIMEOUT);

	dbg("%s - port %d Send get_status_line_state URB returns: %i. Statusline: %02x", 
	    __FUNCTION__, port->number, result, transfer_buffer[0]);

	if ((transfer_buffer[0] & SUSBCR_GSL_DSR) != 0) {
		priv->line_state |= TIOCM_DSR;
	} else {
		priv->line_state &= ~TIOCM_DSR; 
	}

	kfree(transfer_buffer);
	return priv->line_state;
}

static int  kobil_tiocmset(struct usb_serial_port *port, struct file *file,
			   unsigned int set, unsigned int clear)
{
	struct kobil_private * priv;
	int result;
	int dtr = 0;
	int rts = 0;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return -EINVAL;
	}

	// allocate memory for transfer buffer
	transfer_buffer = kzalloc(transfer_buffer_length, GFP_KERNEL);
	if (! transfer_buffer) {
		return -ENOMEM;
	}

	if (set & TIOCM_RTS)
		rts = 1;
	if (set & TIOCM_DTR)
		dtr = 1;
	if (clear & TIOCM_RTS)
		rts = 0;
	if (clear & TIOCM_DTR)
		dtr = 0;

	if (priv->device_type == KOBIL_ADAPTER_B_PRODUCT_ID) {
		if (dtr != 0)
			dbg("%s - port %d Setting DTR", __FUNCTION__, port->number);
		else
			dbg("%s - port %d Clearing DTR", __FUNCTION__, port->number);
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetStatusLinesOrQueues,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  ((dtr != 0) ? SUSBCR_SSL_SETDTR : SUSBCR_SSL_CLRDTR),
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT);
	} else {
		if (rts != 0)
			dbg("%s - port %d Setting RTS", __FUNCTION__, port->number);
		else
			dbg("%s - port %d Clearing RTS", __FUNCTION__, port->number);
		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetStatusLinesOrQueues,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  ((rts != 0) ? SUSBCR_SSL_SETRTS : SUSBCR_SSL_CLRRTS),
					  0,
					  transfer_buffer,
					  0,
					  KOBIL_TIMEOUT);
	}
	dbg("%s - port %d Send set_status_line URB returns: %i", __FUNCTION__, port->number, result);
	kfree(transfer_buffer);
	return (result < 0) ? result : 0;
}


static int  kobil_ioctl(struct usb_serial_port *port, struct file *file,
			unsigned int cmd, unsigned long arg)
{
	struct kobil_private * priv;
	int result;
	unsigned short urb_val = 0;
	unsigned char *transfer_buffer;
	int transfer_buffer_length = 8;
	char *settings;
	void __user *user_arg = (void __user *)arg;

	priv = usb_get_serial_port_data(port);
	if ((priv->device_type == KOBIL_USBTWIN_PRODUCT_ID) || (priv->device_type == KOBIL_KAAN_SIM_PRODUCT_ID)) {
		// This device doesn't support ioctl calls
		return 0;
	}

	switch (cmd) {
	case TCGETS:   // 0x5401
		if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios))) {
			dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
			return -EFAULT;
		}
		if (kernel_termios_to_user_termios((struct termios __user *)arg,
						   &priv->internal_termios))
			return -EFAULT;
		return 0;

	case TCSETS:   // 0x5402
		if (!(port->tty->termios)) {
			dbg("%s - port %d Error: port->tty->termios is NULL", __FUNCTION__, port->number);
			return -ENOTTY;
		}
		if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios))) {
			dbg("%s - port %d Error in access_ok", __FUNCTION__, port->number);
			return -EFAULT;
		}
		if (user_termios_to_kernel_termios(&priv->internal_termios,
						   (struct termios __user *)arg))
			return -EFAULT;
		
		settings = kzalloc(50, GFP_KERNEL);
		if (! settings) {
			return -ENOBUFS;
		}

		switch (priv->internal_termios.c_cflag & CBAUD) {
		case B1200:
			urb_val = SUSBCR_SBR_1200;
			strcat(settings, "1200 ");
			break;
		case B9600:
		default:
			urb_val = SUSBCR_SBR_9600;
			strcat(settings, "9600 ");
			break;
		}

		urb_val |= (priv->internal_termios.c_cflag & CSTOPB) ? SUSBCR_SPASB_2StopBits : SUSBCR_SPASB_1StopBit;
		strcat(settings, (priv->internal_termios.c_cflag & CSTOPB) ? "2 StopBits " : "1 StopBit ");

		if (priv->internal_termios.c_cflag & PARENB) {
			if  (priv->internal_termios.c_cflag & PARODD) {
				urb_val |= SUSBCR_SPASB_OddParity;
				strcat(settings, "Odd Parity");
			} else {
				urb_val |= SUSBCR_SPASB_EvenParity;
				strcat(settings, "Even Parity");
			}
		} else {
			urb_val |= SUSBCR_SPASB_NoParity;
			strcat(settings, "No Parity");
		}
		dbg("%s - port %d setting port to: %s", __FUNCTION__, port->number, settings );

		result = usb_control_msg( port->serial->dev, 
					  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_SetBaudRateParityAndStopBits,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  urb_val,
					  0,
					  settings,
					  0,
					  KOBIL_TIMEOUT
			);

		dbg("%s - port %d Send set_baudrate URB returns: %i", __FUNCTION__, port->number, result);
		kfree(settings);
		return 0;

	case TCFLSH:   // 0x540B
		transfer_buffer = (unsigned char *) kmalloc(transfer_buffer_length, GFP_KERNEL);
		if (! transfer_buffer) {
		 	return -ENOBUFS;
		}

		result = usb_control_msg( port->serial->dev, 
		 			  usb_rcvctrlpipe(port->serial->dev, 0 ), 
					  SUSBCRequest_Misc,
					  USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT,
					  SUSBCR_MSC_ResetAllQueues,
					  0,
					  NULL,//transfer_buffer,
					  0,
					  KOBIL_TIMEOUT
			);
		
		dbg("%s - port %d Send reset_all_queues (FLUSH) URB returns: %i", __FUNCTION__, port->number, result);

		kfree(transfer_buffer);
		return ((result < 0) ? -EFAULT : 0);

	}
	return -ENOIOCTLCMD;
}


static int __init kobil_init (void)
{
	int retval;
	retval = usb_serial_register(&kobil_device);
	if (retval)
		goto failed_usb_serial_register;
	retval = usb_register(&kobil_driver);
	if (retval) 
		goto failed_usb_register;

	info(DRIVER_VERSION " " DRIVER_AUTHOR);
	info(DRIVER_DESC);

	return 0;
failed_usb_register:
	usb_serial_deregister(&kobil_device);
failed_usb_serial_register:
	return retval;
}


static void __exit kobil_exit (void)
{
	usb_deregister (&kobil_driver);
	usb_serial_deregister (&kobil_device);
}

module_init(kobil_init);
module_exit(kobil_exit);

MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE( "GPL" );

module_param(debug, bool, S_IRUGO | S_IWUSR);
MODULE_PARM_DESC(debug, "Debug enabled or not");
OpenPOWER on IntegriCloud