summaryrefslogtreecommitdiffstats
path: root/drivers/usb/serial/spcp8x5.c
blob: a42536af1256afd47352e3ee2de2165ff4312232 (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
/*
 * spcp8x5 USB to serial adaptor driver
 *
 * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
 * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
 * Copyright (C) 2006 S1 Corp.
 *
 * Original driver for 2.6.10 pl2303 driver by
 *   Greg Kroah-Hartman (greg@kroah.com)
 * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
 *
 *	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.
 *
 *
 */
#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 <linux/usb.h>
#include <linux/usb/serial.h>

#define DRIVER_DESC 	"SPCP8x5 USB to serial adaptor driver"

#define SPCP8x5_007_VID		0x04FC
#define SPCP8x5_007_PID		0x0201
#define SPCP8x5_008_VID		0x04fc
#define SPCP8x5_008_PID		0x0235
#define SPCP8x5_PHILIPS_VID	0x0471
#define SPCP8x5_PHILIPS_PID	0x081e
#define SPCP8x5_INTERMATIC_VID	0x04FC
#define SPCP8x5_INTERMATIC_PID	0x0204
#define SPCP8x5_835_VID		0x04fc
#define SPCP8x5_835_PID		0x0231

static const struct usb_device_id id_table[] = {
	{ USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
	{ USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
	{ USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
	{ USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
	{ USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
	{ }					/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, id_table);

struct spcp8x5_usb_ctrl_arg {
	u8 	type;
	u8	cmd;
	u8	cmd_type;
	u16	value;
	u16	index;
	u16	length;
};


/* spcp8x5 spec register define */
#define MCR_CONTROL_LINE_RTS		0x02
#define MCR_CONTROL_LINE_DTR		0x01
#define MCR_DTR				0x01
#define MCR_RTS				0x02

#define MSR_STATUS_LINE_DCD		0x80
#define MSR_STATUS_LINE_RI		0x40
#define MSR_STATUS_LINE_DSR		0x20
#define MSR_STATUS_LINE_CTS		0x10

/* verdor command here , we should define myself */
#define SET_DEFAULT			0x40
#define SET_DEFAULT_TYPE		0x20

#define SET_UART_FORMAT			0x40
#define SET_UART_FORMAT_TYPE		0x21
#define SET_UART_FORMAT_SIZE_5		0x00
#define SET_UART_FORMAT_SIZE_6		0x01
#define SET_UART_FORMAT_SIZE_7		0x02
#define SET_UART_FORMAT_SIZE_8		0x03
#define SET_UART_FORMAT_STOP_1		0x00
#define SET_UART_FORMAT_STOP_2		0x04
#define SET_UART_FORMAT_PAR_NONE	0x00
#define SET_UART_FORMAT_PAR_ODD		0x10
#define SET_UART_FORMAT_PAR_EVEN	0x30
#define SET_UART_FORMAT_PAR_MASK	0xD0
#define SET_UART_FORMAT_PAR_SPACE	0x90

#define GET_UART_STATUS_TYPE		0xc0
#define GET_UART_STATUS			0x22
#define GET_UART_STATUS_MSR		0x06

#define SET_UART_STATUS			0x40
#define SET_UART_STATUS_TYPE		0x23
#define SET_UART_STATUS_MCR		0x0004
#define SET_UART_STATUS_MCR_DTR		0x01
#define SET_UART_STATUS_MCR_RTS		0x02
#define SET_UART_STATUS_MCR_LOOP	0x10

#define SET_WORKING_MODE		0x40
#define SET_WORKING_MODE_TYPE		0x24
#define SET_WORKING_MODE_U2C		0x00
#define SET_WORKING_MODE_RS485		0x01
#define SET_WORKING_MODE_PDMA		0x02
#define SET_WORKING_MODE_SPP		0x03

#define SET_FLOWCTL_CHAR		0x40
#define SET_FLOWCTL_CHAR_TYPE		0x25

#define GET_VERSION			0xc0
#define GET_VERSION_TYPE		0x26

#define SET_REGISTER			0x40
#define SET_REGISTER_TYPE		0x27

#define	GET_REGISTER			0xc0
#define GET_REGISTER_TYPE		0x28

#define SET_RAM				0x40
#define SET_RAM_TYPE			0x31

#define GET_RAM				0xc0
#define GET_RAM_TYPE			0x32

/* how come ??? */
#define UART_STATE			0x08
#define UART_STATE_TRANSIENT_MASK	0x75
#define UART_DCD			0x01
#define UART_DSR			0x02
#define UART_BREAK_ERROR		0x04
#define UART_RING			0x08
#define UART_FRAME_ERROR		0x10
#define UART_PARITY_ERROR		0x20
#define UART_OVERRUN_ERROR		0x40
#define UART_CTS			0x80

enum spcp8x5_type {
	SPCP825_007_TYPE,
	SPCP825_008_TYPE,
	SPCP825_PHILIP_TYPE,
	SPCP825_INTERMATIC_TYPE,
	SPCP835_TYPE,
};

struct spcp8x5_private {
	spinlock_t 	lock;
	enum spcp8x5_type	type;
	wait_queue_head_t	delta_msr_wait;
	u8 			line_control;
	u8 			line_status;
};

static int spcp8x5_port_probe(struct usb_serial_port *port)
{
	struct usb_serial *serial = port->serial;
	struct spcp8x5_private *priv;
	enum spcp8x5_type type = SPCP825_007_TYPE;
	u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);

	if (product == 0x0201)
		type = SPCP825_007_TYPE;
	else if (product == 0x0231)
		type = SPCP835_TYPE;
	else if (product == 0x0235)
		type = SPCP825_008_TYPE;
	else if (product == 0x0204)
		type = SPCP825_INTERMATIC_TYPE;
	else if (product == 0x0471 &&
		 serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
		type = SPCP825_PHILIP_TYPE;
	dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
		return -ENOMEM;

	spin_lock_init(&priv->lock);
	init_waitqueue_head(&priv->delta_msr_wait);
	priv->type = type;

	usb_set_serial_port_data(port , priv);

	return 0;
}

static int spcp8x5_port_remove(struct usb_serial_port *port)
{
	struct spcp8x5_private *priv;

	priv = usb_get_serial_port_data(port);
	kfree(priv);

	return 0;
}

/* set the modem control line of the device.
 * NOTE spcp825-007 not supported this */
static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
				enum spcp8x5_type type)
{
	int retval;
	u8 mcr = 0 ;

	if (type == SPCP825_007_TYPE)
		return -EPERM;

	mcr = (unsigned short)value;
	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
				 SET_UART_STATUS_TYPE, SET_UART_STATUS,
				 mcr, 0x04, NULL, 0, 100);
	if (retval != 0)
		dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
	return retval;
}

/* get the modem status register of the device
 * NOTE spcp825-007 not supported this */
static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
			   enum spcp8x5_type type)
{
	u8 *status_buffer;
	int ret;

	/* I return Permited not support here but seem inval device
	 * is more fix */
	if (type == SPCP825_007_TYPE)
		return -EPERM;
	if (status == NULL)
		return -EINVAL;

	status_buffer = kmalloc(1, GFP_KERNEL);
	if (!status_buffer)
		return -ENOMEM;
	status_buffer[0] = status[0];

	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
			      GET_UART_STATUS, GET_UART_STATUS_TYPE,
			      0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
	if (ret < 0)
		dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
			status_buffer, ret);

	dev_dbg(&dev->dev, "0xc0:0x22:0:6  %d - 0x%p ", ret, status_buffer);
	status[0] = status_buffer[0];
	kfree(status_buffer);

	return ret;
}

/* select the work mode.
 * NOTE this function not supported by spcp825-007 */
static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
				 u16 index, enum spcp8x5_type type)
{
	int ret;

	/* I return Permited not support here but seem inval device
	 * is more fix */
	if (type == SPCP825_007_TYPE)
		return;

	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
			      SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
			      value, index, NULL, 0, 100);
	dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
	if (ret < 0)
		dev_dbg(&dev->dev,
			"RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
}

static int spcp8x5_carrier_raised(struct usb_serial_port *port)
{
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	if (priv->line_status & MSR_STATUS_LINE_DCD)
		return 1;
	return 0;
}

static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
{
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

	spin_lock_irqsave(&priv->lock, flags);
	if (on)
		priv->line_control = MCR_CONTROL_LINE_DTR
						| MCR_CONTROL_LINE_RTS;
	else
		priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
						| MCR_CONTROL_LINE_RTS);
	control = priv->line_control;
	spin_unlock_irqrestore(&priv->lock, flags);
	spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
}

static void spcp8x5_init_termios(struct tty_struct *tty)
{
	/* for the 1st time call this function */
	tty->termios = tty_std_termios;
	tty->termios.c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
	tty->termios.c_ispeed = 115200;
	tty->termios.c_ospeed = 115200;
}

/* set the serial param for transfer. we should check if we really need to
 * transfer. if we set flow control we should do this too. */
static void spcp8x5_set_termios(struct tty_struct *tty,
		struct usb_serial_port *port, struct ktermios *old_termios)
{
	struct usb_serial *serial = port->serial;
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int cflag = tty->termios.c_cflag;
	unsigned int old_cflag = old_termios->c_cflag;
	unsigned short uartdata;
	unsigned char buf[2] = {0, 0};
	int baud;
	int i;
	u8 control;


	/* check that they really want us to change something */
	if (!tty_termios_hw_change(&tty->termios, old_termios))
		return;

	/* set DTR/RTS active */
	spin_lock_irqsave(&priv->lock, flags);
	control = priv->line_control;
	if ((old_cflag & CBAUD) == B0) {
		priv->line_control |= MCR_DTR;
		if (!(old_cflag & CRTSCTS))
			priv->line_control |= MCR_RTS;
	}
	if (control != priv->line_control) {
		control = priv->line_control;
		spin_unlock_irqrestore(&priv->lock, flags);
		spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
	} else {
		spin_unlock_irqrestore(&priv->lock, flags);
	}

	/* Set Baud Rate */
	baud = tty_get_baud_rate(tty);
	switch (baud) {
	case 300:	buf[0] = 0x00;	break;
	case 600:	buf[0] = 0x01;	break;
	case 1200:	buf[0] = 0x02;	break;
	case 2400:	buf[0] = 0x03;	break;
	case 4800:	buf[0] = 0x04;	break;
	case 9600:	buf[0] = 0x05;	break;
	case 19200:	buf[0] = 0x07;	break;
	case 38400:	buf[0] = 0x09;	break;
	case 57600:	buf[0] = 0x0a;	break;
	case 115200:	buf[0] = 0x0b;	break;
	case 230400:	buf[0] = 0x0c;	break;
	case 460800:	buf[0] = 0x0d;	break;
	case 921600:	buf[0] = 0x0e;	break;
/*	case 1200000:	buf[0] = 0x0f;	break; */
/*	case 2400000:	buf[0] = 0x10;	break; */
	case 3000000:	buf[0] = 0x11;	break;
/*	case 6000000:	buf[0] = 0x12;	break; */
	case 0:
	case 1000000:
			buf[0] = 0x0b;	break;
	default:
		dev_err(&port->dev, "spcp825 driver does not support the "
			"baudrate requested, using default of 9600.\n");
	}

	/* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
	if (cflag & CSIZE) {
		switch (cflag & CSIZE) {
		case CS5:
			buf[1] |= SET_UART_FORMAT_SIZE_5;
			break;
		case CS6:
			buf[1] |= SET_UART_FORMAT_SIZE_6;
			break;
		case CS7:
			buf[1] |= SET_UART_FORMAT_SIZE_7;
			break;
		default:
		case CS8:
			buf[1] |= SET_UART_FORMAT_SIZE_8;
			break;
		}
	}

	/* Set Stop bit2 : 0:1bit 1:2bit */
	buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
				     SET_UART_FORMAT_STOP_1;

	/* Set Parity bit3-4 01:Odd 11:Even */
	if (cflag & PARENB) {
		buf[1] |= (cflag & PARODD) ?
		SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
	} else
		buf[1] |= SET_UART_FORMAT_PAR_NONE;

	uartdata = buf[0] | buf[1]<<8;

	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			    SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
			    uartdata, 0, NULL, 0, 100);
	if (i < 0)
		dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
			uartdata, i);
	dev_dbg(&port->dev, "0x21:0x40:0:0  %d\n", i);

	if (cflag & CRTSCTS) {
		/* enable hardware flow control */
		spcp8x5_set_workMode(serial->dev, 0x000a,
				     SET_WORKING_MODE_U2C, priv->type);
	}
}

/* open the serial port. do some usb system call. set termios and get the line
 * status of the device. */
static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
{
	struct ktermios tmp_termios;
	struct usb_serial *serial = port->serial;
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	int ret;
	unsigned long flags;
	u8 status = 0x30;
	/* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */

	usb_clear_halt(serial->dev, port->write_urb->pipe);
	usb_clear_halt(serial->dev, port->read_urb->pipe);

	ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
			      0x09, 0x00,
			      0x01, 0x00, NULL, 0x00, 100);
	if (ret)
		return ret;

	spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);

	/* Setup termios */
	if (tty)
		spcp8x5_set_termios(tty, port, &tmp_termios);

	spcp8x5_get_msr(serial->dev, &status, priv->type);

	/* may be we should update uart status here but now we did not do */
	spin_lock_irqsave(&priv->lock, flags);
	priv->line_status = status & 0xf0 ;
	spin_unlock_irqrestore(&priv->lock, flags);

	port->port.drain_delay = 256;

	return usb_serial_generic_open(tty, port);
}

static void spcp8x5_process_read_urb(struct urb *urb)
{
	struct usb_serial_port *port = urb->context;
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	struct tty_struct *tty;
	unsigned char *data = urb->transfer_buffer;
	unsigned long flags;
	u8 status;
	char tty_flag;

	/* get tty_flag from status */
	tty_flag = TTY_NORMAL;

	spin_lock_irqsave(&priv->lock, flags);
	status = priv->line_status;
	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
	spin_unlock_irqrestore(&priv->lock, flags);
	/* wake up the wait for termios */
	wake_up_interruptible(&priv->delta_msr_wait);

	if (!urb->actual_length)
		return;

	tty = tty_port_tty_get(&port->port);
	if (!tty)
		return;

	if (status & UART_STATE_TRANSIENT_MASK) {
		/* break takes precedence over parity, which takes precedence
		 * over framing errors */
		if (status & UART_BREAK_ERROR)
			tty_flag = TTY_BREAK;
		else if (status & UART_PARITY_ERROR)
			tty_flag = TTY_PARITY;
		else if (status & UART_FRAME_ERROR)
			tty_flag = TTY_FRAME;
		dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);

		/* overrun is special, not associated with a char */
		if (status & UART_OVERRUN_ERROR)
			tty_insert_flip_char(tty, 0, TTY_OVERRUN);

		if (status & UART_DCD)
			usb_serial_handle_dcd_change(port, tty,
				   priv->line_status & MSR_STATUS_LINE_DCD);
	}

	tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
							urb->actual_length);
	tty_flip_buffer_push(tty);
	tty_kref_put(tty);
}

static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
				   unsigned int arg)
{
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int prevstatus;
	unsigned int status;
	unsigned int changed;

	spin_lock_irqsave(&priv->lock, flags);
	prevstatus = priv->line_status;
	spin_unlock_irqrestore(&priv->lock, flags);

	while (1) {
		/* wake up in bulk read */
		interruptible_sleep_on(&priv->delta_msr_wait);

		/* see if a signal did it */
		if (signal_pending(current))
			return -ERESTARTSYS;

		spin_lock_irqsave(&priv->lock, flags);
		status = priv->line_status;
		spin_unlock_irqrestore(&priv->lock, flags);

		changed = prevstatus^status;

		if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
		    ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
		    ((arg & TIOCM_CD)  && (changed & MSR_STATUS_LINE_DCD)) ||
		    ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
			return 0;

		prevstatus = status;
	}
	/* NOTREACHED */
	return 0;
}

static int spcp8x5_ioctl(struct tty_struct *tty,
			 unsigned int cmd, unsigned long arg)
{
	struct usb_serial_port *port = tty->driver_data;

	dev_dbg(&port->dev, "%s (%d) cmd = 0x%04x\n", __func__,
		port->number, cmd);

	switch (cmd) {
	case TIOCMIWAIT:
		dev_dbg(&port->dev, "%s (%d) TIOCMIWAIT\n", __func__,
			port->number);
		return spcp8x5_wait_modem_info(port, arg);

	default:
		dev_dbg(&port->dev, "%s not supported = 0x%04x", __func__,
			cmd);
		break;
	}

	return -ENOIOCTLCMD;
}

static int spcp8x5_tiocmset(struct tty_struct *tty,
			    unsigned int set, unsigned int clear)
{
	struct usb_serial_port *port = tty->driver_data;
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	u8 control;

	spin_lock_irqsave(&priv->lock, flags);
	if (set & TIOCM_RTS)
		priv->line_control |= MCR_RTS;
	if (set & TIOCM_DTR)
		priv->line_control |= MCR_DTR;
	if (clear & TIOCM_RTS)
		priv->line_control &= ~MCR_RTS;
	if (clear & TIOCM_DTR)
		priv->line_control &= ~MCR_DTR;
	control = priv->line_control;
	spin_unlock_irqrestore(&priv->lock, flags);

	return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
}

static int spcp8x5_tiocmget(struct tty_struct *tty)
{
	struct usb_serial_port *port = tty->driver_data;
	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
	unsigned long flags;
	unsigned int mcr;
	unsigned int status;
	unsigned int result;

	spin_lock_irqsave(&priv->lock, flags);
	mcr = priv->line_control;
	status = priv->line_status;
	spin_unlock_irqrestore(&priv->lock, flags);

	result = ((mcr & MCR_DTR)			? TIOCM_DTR : 0)
		  | ((mcr & MCR_RTS)			? TIOCM_RTS : 0)
		  | ((status & MSR_STATUS_LINE_CTS)	? TIOCM_CTS : 0)
		  | ((status & MSR_STATUS_LINE_DSR)	? TIOCM_DSR : 0)
		  | ((status & MSR_STATUS_LINE_RI)	? TIOCM_RI  : 0)
		  | ((status & MSR_STATUS_LINE_DCD)	? TIOCM_CD  : 0);

	return result;
}

/* All of the device info needed for the spcp8x5 SIO serial converter */
static struct usb_serial_driver spcp8x5_device = {
	.driver = {
		.owner =	THIS_MODULE,
		.name =		"SPCP8x5",
	},
	.id_table		= id_table,
	.num_ports		= 1,
	.open 			= spcp8x5_open,
	.dtr_rts		= spcp8x5_dtr_rts,
	.carrier_raised		= spcp8x5_carrier_raised,
	.set_termios 		= spcp8x5_set_termios,
	.init_termios		= spcp8x5_init_termios,
	.ioctl 			= spcp8x5_ioctl,
	.tiocmget 		= spcp8x5_tiocmget,
	.tiocmset 		= spcp8x5_tiocmset,
	.port_probe		= spcp8x5_port_probe,
	.port_remove		= spcp8x5_port_remove,
	.process_read_urb	= spcp8x5_process_read_urb,
};

static struct usb_serial_driver * const serial_drivers[] = {
	&spcp8x5_device, NULL
};

module_usb_serial_driver(serial_drivers, id_table);

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