xref: /openbmc/linux/drivers/usb/serial/spcp8x5.c (revision 32078f915d1acab356080b144aa89fe3487f3979)
1 /*
2  * spcp8x5 USB to serial adaptor driver
3  *
4  * Copyright (C) 2010 Johan Hovold (jhovold@gmail.com)
5  * Copyright (C) 2006 Linxb (xubin.lin@worldplus.com.cn)
6  * Copyright (C) 2006 S1 Corp.
7  *
8  * Original driver for 2.6.10 pl2303 driver by
9  *   Greg Kroah-Hartman (greg@kroah.com)
10  * Changes for 2.6.20 by Harald Klein <hari@vt100.at>
11  *
12  *	This program is free software; you can redistribute it and/or modify
13  *	it under the terms of the GNU General Public License as published by
14  *	the Free Software Foundation; either version 2 of the License, or
15  *	(at your option) any later version.
16  *
17  *
18  */
19 #include <linux/kernel.h>
20 #include <linux/errno.h>
21 #include <linux/init.h>
22 #include <linux/slab.h>
23 #include <linux/tty.h>
24 #include <linux/tty_driver.h>
25 #include <linux/tty_flip.h>
26 #include <linux/module.h>
27 #include <linux/spinlock.h>
28 #include <linux/usb.h>
29 #include <linux/usb/serial.h>
30 
31 
32 /* Version Information */
33 #define DRIVER_VERSION	"v0.10"
34 #define DRIVER_DESC 	"SPCP8x5 USB to serial adaptor driver"
35 
36 static bool debug;
37 
38 #define SPCP8x5_007_VID		0x04FC
39 #define SPCP8x5_007_PID		0x0201
40 #define SPCP8x5_008_VID		0x04fc
41 #define SPCP8x5_008_PID		0x0235
42 #define SPCP8x5_PHILIPS_VID	0x0471
43 #define SPCP8x5_PHILIPS_PID	0x081e
44 #define SPCP8x5_INTERMATIC_VID	0x04FC
45 #define SPCP8x5_INTERMATIC_PID	0x0204
46 #define SPCP8x5_835_VID		0x04fc
47 #define SPCP8x5_835_PID		0x0231
48 
49 static const struct usb_device_id id_table[] = {
50 	{ USB_DEVICE(SPCP8x5_PHILIPS_VID , SPCP8x5_PHILIPS_PID)},
51 	{ USB_DEVICE(SPCP8x5_INTERMATIC_VID, SPCP8x5_INTERMATIC_PID)},
52 	{ USB_DEVICE(SPCP8x5_835_VID, SPCP8x5_835_PID)},
53 	{ USB_DEVICE(SPCP8x5_008_VID, SPCP8x5_008_PID)},
54 	{ USB_DEVICE(SPCP8x5_007_VID, SPCP8x5_007_PID)},
55 	{ }					/* Terminating entry */
56 };
57 MODULE_DEVICE_TABLE(usb, id_table);
58 
59 struct spcp8x5_usb_ctrl_arg {
60 	u8 	type;
61 	u8	cmd;
62 	u8	cmd_type;
63 	u16	value;
64 	u16	index;
65 	u16	length;
66 };
67 
68 
69 /* spcp8x5 spec register define */
70 #define MCR_CONTROL_LINE_RTS		0x02
71 #define MCR_CONTROL_LINE_DTR		0x01
72 #define MCR_DTR				0x01
73 #define MCR_RTS				0x02
74 
75 #define MSR_STATUS_LINE_DCD		0x80
76 #define MSR_STATUS_LINE_RI		0x40
77 #define MSR_STATUS_LINE_DSR		0x20
78 #define MSR_STATUS_LINE_CTS		0x10
79 
80 /* verdor command here , we should define myself */
81 #define SET_DEFAULT			0x40
82 #define SET_DEFAULT_TYPE		0x20
83 
84 #define SET_UART_FORMAT			0x40
85 #define SET_UART_FORMAT_TYPE		0x21
86 #define SET_UART_FORMAT_SIZE_5		0x00
87 #define SET_UART_FORMAT_SIZE_6		0x01
88 #define SET_UART_FORMAT_SIZE_7		0x02
89 #define SET_UART_FORMAT_SIZE_8		0x03
90 #define SET_UART_FORMAT_STOP_1		0x00
91 #define SET_UART_FORMAT_STOP_2		0x04
92 #define SET_UART_FORMAT_PAR_NONE	0x00
93 #define SET_UART_FORMAT_PAR_ODD		0x10
94 #define SET_UART_FORMAT_PAR_EVEN	0x30
95 #define SET_UART_FORMAT_PAR_MASK	0xD0
96 #define SET_UART_FORMAT_PAR_SPACE	0x90
97 
98 #define GET_UART_STATUS_TYPE		0xc0
99 #define GET_UART_STATUS			0x22
100 #define GET_UART_STATUS_MSR		0x06
101 
102 #define SET_UART_STATUS			0x40
103 #define SET_UART_STATUS_TYPE		0x23
104 #define SET_UART_STATUS_MCR		0x0004
105 #define SET_UART_STATUS_MCR_DTR		0x01
106 #define SET_UART_STATUS_MCR_RTS		0x02
107 #define SET_UART_STATUS_MCR_LOOP	0x10
108 
109 #define SET_WORKING_MODE		0x40
110 #define SET_WORKING_MODE_TYPE		0x24
111 #define SET_WORKING_MODE_U2C		0x00
112 #define SET_WORKING_MODE_RS485		0x01
113 #define SET_WORKING_MODE_PDMA		0x02
114 #define SET_WORKING_MODE_SPP		0x03
115 
116 #define SET_FLOWCTL_CHAR		0x40
117 #define SET_FLOWCTL_CHAR_TYPE		0x25
118 
119 #define GET_VERSION			0xc0
120 #define GET_VERSION_TYPE		0x26
121 
122 #define SET_REGISTER			0x40
123 #define SET_REGISTER_TYPE		0x27
124 
125 #define	GET_REGISTER			0xc0
126 #define GET_REGISTER_TYPE		0x28
127 
128 #define SET_RAM				0x40
129 #define SET_RAM_TYPE			0x31
130 
131 #define GET_RAM				0xc0
132 #define GET_RAM_TYPE			0x32
133 
134 /* how come ??? */
135 #define UART_STATE			0x08
136 #define UART_STATE_TRANSIENT_MASK	0x75
137 #define UART_DCD			0x01
138 #define UART_DSR			0x02
139 #define UART_BREAK_ERROR		0x04
140 #define UART_RING			0x08
141 #define UART_FRAME_ERROR		0x10
142 #define UART_PARITY_ERROR		0x20
143 #define UART_OVERRUN_ERROR		0x40
144 #define UART_CTS			0x80
145 
146 enum spcp8x5_type {
147 	SPCP825_007_TYPE,
148 	SPCP825_008_TYPE,
149 	SPCP825_PHILIP_TYPE,
150 	SPCP825_INTERMATIC_TYPE,
151 	SPCP835_TYPE,
152 };
153 
154 static struct usb_driver spcp8x5_driver = {
155 	.name =			"spcp8x5",
156 	.id_table =		id_table,
157 };
158 
159 
160 struct spcp8x5_private {
161 	spinlock_t 	lock;
162 	enum spcp8x5_type	type;
163 	wait_queue_head_t	delta_msr_wait;
164 	u8 			line_control;
165 	u8 			line_status;
166 };
167 
168 /* desc : when device plug in,this function would be called.
169  * thanks to usb_serial subsystem,then do almost every things for us. And what
170  * we should do just alloc the buffer */
171 static int spcp8x5_startup(struct usb_serial *serial)
172 {
173 	struct spcp8x5_private *priv;
174 	int i;
175 	enum spcp8x5_type type = SPCP825_007_TYPE;
176 	u16 product = le16_to_cpu(serial->dev->descriptor.idProduct);
177 
178 	if (product == 0x0201)
179 		type = SPCP825_007_TYPE;
180 	else if (product == 0x0231)
181 		type = SPCP835_TYPE;
182 	else if (product == 0x0235)
183 		type = SPCP825_008_TYPE;
184 	else if (product == 0x0204)
185 		type = SPCP825_INTERMATIC_TYPE;
186 	else if (product == 0x0471 &&
187 		 serial->dev->descriptor.idVendor == cpu_to_le16(0x081e))
188 		type = SPCP825_PHILIP_TYPE;
189 	dev_dbg(&serial->dev->dev, "device type = %d\n", (int)type);
190 
191 	for (i = 0; i < serial->num_ports; ++i) {
192 		priv = kzalloc(sizeof(struct spcp8x5_private), GFP_KERNEL);
193 		if (!priv)
194 			goto cleanup;
195 
196 		spin_lock_init(&priv->lock);
197 		init_waitqueue_head(&priv->delta_msr_wait);
198 		priv->type = type;
199 		usb_set_serial_port_data(serial->port[i] , priv);
200 	}
201 
202 	return 0;
203 cleanup:
204 	for (--i; i >= 0; --i) {
205 		priv = usb_get_serial_port_data(serial->port[i]);
206 		kfree(priv);
207 		usb_set_serial_port_data(serial->port[i] , NULL);
208 	}
209 	return -ENOMEM;
210 }
211 
212 /* call when the device plug out. free all the memory alloced by probe */
213 static void spcp8x5_release(struct usb_serial *serial)
214 {
215 	int i;
216 
217 	for (i = 0; i < serial->num_ports; i++)
218 		kfree(usb_get_serial_port_data(serial->port[i]));
219 }
220 
221 /* set the modem control line of the device.
222  * NOTE spcp825-007 not supported this */
223 static int spcp8x5_set_ctrlLine(struct usb_device *dev, u8 value,
224 				enum spcp8x5_type type)
225 {
226 	int retval;
227 	u8 mcr = 0 ;
228 
229 	if (type == SPCP825_007_TYPE)
230 		return -EPERM;
231 
232 	mcr = (unsigned short)value;
233 	retval = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
234 				 SET_UART_STATUS_TYPE, SET_UART_STATUS,
235 				 mcr, 0x04, NULL, 0, 100);
236 	if (retval != 0)
237 		dev_dbg(&dev->dev, "usb_control_msg return %#x\n", retval);
238 	return retval;
239 }
240 
241 /* get the modem status register of the device
242  * NOTE spcp825-007 not supported this */
243 static int spcp8x5_get_msr(struct usb_device *dev, u8 *status,
244 			   enum spcp8x5_type type)
245 {
246 	u8 *status_buffer;
247 	int ret;
248 
249 	/* I return Permited not support here but seem inval device
250 	 * is more fix */
251 	if (type == SPCP825_007_TYPE)
252 		return -EPERM;
253 	if (status == NULL)
254 		return -EINVAL;
255 
256 	status_buffer = kmalloc(1, GFP_KERNEL);
257 	if (!status_buffer)
258 		return -ENOMEM;
259 	status_buffer[0] = status[0];
260 
261 	ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
262 			      GET_UART_STATUS, GET_UART_STATUS_TYPE,
263 			      0, GET_UART_STATUS_MSR, status_buffer, 1, 100);
264 	if (ret < 0)
265 		dev_dbg(&dev->dev, "Get MSR = 0x%p failed (error = %d)",
266 			status_buffer, ret);
267 
268 	dev_dbg(&dev->dev, "0xc0:0x22:0:6  %d - 0x%p ", ret, status_buffer);
269 	status[0] = status_buffer[0];
270 	kfree(status_buffer);
271 
272 	return ret;
273 }
274 
275 /* select the work mode.
276  * NOTE this function not supported by spcp825-007 */
277 static void spcp8x5_set_workMode(struct usb_device *dev, u16 value,
278 				 u16 index, enum spcp8x5_type type)
279 {
280 	int ret;
281 
282 	/* I return Permited not support here but seem inval device
283 	 * is more fix */
284 	if (type == SPCP825_007_TYPE)
285 		return;
286 
287 	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
288 			      SET_WORKING_MODE_TYPE, SET_WORKING_MODE,
289 			      value, index, NULL, 0, 100);
290 	dev_dbg(&dev->dev, "value = %#x , index = %#x\n", value, index);
291 	if (ret < 0)
292 		dev_dbg(&dev->dev,
293 			"RTSCTS usb_control_msg(enable flowctrl) = %d\n", ret);
294 }
295 
296 static int spcp8x5_carrier_raised(struct usb_serial_port *port)
297 {
298 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
299 	if (priv->line_status & MSR_STATUS_LINE_DCD)
300 		return 1;
301 	return 0;
302 }
303 
304 static void spcp8x5_dtr_rts(struct usb_serial_port *port, int on)
305 {
306 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
307 	unsigned long flags;
308 	u8 control;
309 
310 	spin_lock_irqsave(&priv->lock, flags);
311 	if (on)
312 		priv->line_control = MCR_CONTROL_LINE_DTR
313 						| MCR_CONTROL_LINE_RTS;
314 	else
315 		priv->line_control &= ~ (MCR_CONTROL_LINE_DTR
316 						| MCR_CONTROL_LINE_RTS);
317 	control = priv->line_control;
318 	spin_unlock_irqrestore(&priv->lock, flags);
319 	spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
320 }
321 
322 static void spcp8x5_init_termios(struct tty_struct *tty)
323 {
324 	/* for the 1st time call this function */
325 	*(tty->termios) = tty_std_termios;
326 	tty->termios->c_cflag = B115200 | CS8 | CREAD | HUPCL | CLOCAL;
327 	tty->termios->c_ispeed = 115200;
328 	tty->termios->c_ospeed = 115200;
329 }
330 
331 /* set the serial param for transfer. we should check if we really need to
332  * transfer. if we set flow control we should do this too. */
333 static void spcp8x5_set_termios(struct tty_struct *tty,
334 		struct usb_serial_port *port, struct ktermios *old_termios)
335 {
336 	struct usb_serial *serial = port->serial;
337 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
338 	unsigned long flags;
339 	unsigned int cflag = tty->termios->c_cflag;
340 	unsigned int old_cflag = old_termios->c_cflag;
341 	unsigned short uartdata;
342 	unsigned char buf[2] = {0, 0};
343 	int baud;
344 	int i;
345 	u8 control;
346 
347 
348 	/* check that they really want us to change something */
349 	if (!tty_termios_hw_change(tty->termios, old_termios))
350 		return;
351 
352 	/* set DTR/RTS active */
353 	spin_lock_irqsave(&priv->lock, flags);
354 	control = priv->line_control;
355 	if ((old_cflag & CBAUD) == B0) {
356 		priv->line_control |= MCR_DTR;
357 		if (!(old_cflag & CRTSCTS))
358 			priv->line_control |= MCR_RTS;
359 	}
360 	if (control != priv->line_control) {
361 		control = priv->line_control;
362 		spin_unlock_irqrestore(&priv->lock, flags);
363 		spcp8x5_set_ctrlLine(serial->dev, control , priv->type);
364 	} else {
365 		spin_unlock_irqrestore(&priv->lock, flags);
366 	}
367 
368 	/* Set Baud Rate */
369 	baud = tty_get_baud_rate(tty);
370 	switch (baud) {
371 	case 300:	buf[0] = 0x00;	break;
372 	case 600:	buf[0] = 0x01;	break;
373 	case 1200:	buf[0] = 0x02;	break;
374 	case 2400:	buf[0] = 0x03;	break;
375 	case 4800:	buf[0] = 0x04;	break;
376 	case 9600:	buf[0] = 0x05;	break;
377 	case 19200:	buf[0] = 0x07;	break;
378 	case 38400:	buf[0] = 0x09;	break;
379 	case 57600:	buf[0] = 0x0a;	break;
380 	case 115200:	buf[0] = 0x0b;	break;
381 	case 230400:	buf[0] = 0x0c;	break;
382 	case 460800:	buf[0] = 0x0d;	break;
383 	case 921600:	buf[0] = 0x0e;	break;
384 /*	case 1200000:	buf[0] = 0x0f;	break; */
385 /*	case 2400000:	buf[0] = 0x10;	break; */
386 	case 3000000:	buf[0] = 0x11;	break;
387 /*	case 6000000:	buf[0] = 0x12;	break; */
388 	case 0:
389 	case 1000000:
390 			buf[0] = 0x0b;	break;
391 	default:
392 		dev_err(&port->dev, "spcp825 driver does not support the "
393 			"baudrate requested, using default of 9600.\n");
394 	}
395 
396 	/* Set Data Length : 00:5bit, 01:6bit, 10:7bit, 11:8bit */
397 	if (cflag & CSIZE) {
398 		switch (cflag & CSIZE) {
399 		case CS5:
400 			buf[1] |= SET_UART_FORMAT_SIZE_5;
401 			break;
402 		case CS6:
403 			buf[1] |= SET_UART_FORMAT_SIZE_6;
404 			break;
405 		case CS7:
406 			buf[1] |= SET_UART_FORMAT_SIZE_7;
407 			break;
408 		default:
409 		case CS8:
410 			buf[1] |= SET_UART_FORMAT_SIZE_8;
411 			break;
412 		}
413 	}
414 
415 	/* Set Stop bit2 : 0:1bit 1:2bit */
416 	buf[1] |= (cflag & CSTOPB) ? SET_UART_FORMAT_STOP_2 :
417 				     SET_UART_FORMAT_STOP_1;
418 
419 	/* Set Parity bit3-4 01:Odd 11:Even */
420 	if (cflag & PARENB) {
421 		buf[1] |= (cflag & PARODD) ?
422 		SET_UART_FORMAT_PAR_ODD : SET_UART_FORMAT_PAR_EVEN ;
423 	} else
424 		buf[1] |= SET_UART_FORMAT_PAR_NONE;
425 
426 	uartdata = buf[0] | buf[1]<<8;
427 
428 	i = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
429 			    SET_UART_FORMAT_TYPE, SET_UART_FORMAT,
430 			    uartdata, 0, NULL, 0, 100);
431 	if (i < 0)
432 		dev_err(&port->dev, "Set UART format %#x failed (error = %d)\n",
433 			uartdata, i);
434 	dbg("0x21:0x40:0:0  %d", i);
435 
436 	if (cflag & CRTSCTS) {
437 		/* enable hardware flow control */
438 		spcp8x5_set_workMode(serial->dev, 0x000a,
439 				     SET_WORKING_MODE_U2C, priv->type);
440 	}
441 }
442 
443 /* open the serial port. do some usb system call. set termios and get the line
444  * status of the device. */
445 static int spcp8x5_open(struct tty_struct *tty, struct usb_serial_port *port)
446 {
447 	struct ktermios tmp_termios;
448 	struct usb_serial *serial = port->serial;
449 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
450 	int ret;
451 	unsigned long flags;
452 	u8 status = 0x30;
453 	/* status 0x30 means DSR and CTS = 1 other CDC RI and delta = 0 */
454 
455 	usb_clear_halt(serial->dev, port->write_urb->pipe);
456 	usb_clear_halt(serial->dev, port->read_urb->pipe);
457 
458 	ret = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
459 			      0x09, 0x00,
460 			      0x01, 0x00, NULL, 0x00, 100);
461 	if (ret)
462 		return ret;
463 
464 	spcp8x5_set_ctrlLine(serial->dev, priv->line_control , priv->type);
465 
466 	/* Setup termios */
467 	if (tty)
468 		spcp8x5_set_termios(tty, port, &tmp_termios);
469 
470 	spcp8x5_get_msr(serial->dev, &status, priv->type);
471 
472 	/* may be we should update uart status here but now we did not do */
473 	spin_lock_irqsave(&priv->lock, flags);
474 	priv->line_status = status & 0xf0 ;
475 	spin_unlock_irqrestore(&priv->lock, flags);
476 
477 	port->port.drain_delay = 256;
478 
479 	return usb_serial_generic_open(tty, port);
480 }
481 
482 static void spcp8x5_process_read_urb(struct urb *urb)
483 {
484 	struct usb_serial_port *port = urb->context;
485 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
486 	struct tty_struct *tty;
487 	unsigned char *data = urb->transfer_buffer;
488 	unsigned long flags;
489 	u8 status;
490 	char tty_flag;
491 
492 	/* get tty_flag from status */
493 	tty_flag = TTY_NORMAL;
494 
495 	spin_lock_irqsave(&priv->lock, flags);
496 	status = priv->line_status;
497 	priv->line_status &= ~UART_STATE_TRANSIENT_MASK;
498 	spin_unlock_irqrestore(&priv->lock, flags);
499 	/* wake up the wait for termios */
500 	wake_up_interruptible(&priv->delta_msr_wait);
501 
502 	if (!urb->actual_length)
503 		return;
504 
505 	tty = tty_port_tty_get(&port->port);
506 	if (!tty)
507 		return;
508 
509 	if (status & UART_STATE_TRANSIENT_MASK) {
510 		/* break takes precedence over parity, which takes precedence
511 		 * over framing errors */
512 		if (status & UART_BREAK_ERROR)
513 			tty_flag = TTY_BREAK;
514 		else if (status & UART_PARITY_ERROR)
515 			tty_flag = TTY_PARITY;
516 		else if (status & UART_FRAME_ERROR)
517 			tty_flag = TTY_FRAME;
518 		dev_dbg(&port->dev, "tty_flag = %d\n", tty_flag);
519 
520 		/* overrun is special, not associated with a char */
521 		if (status & UART_OVERRUN_ERROR)
522 			tty_insert_flip_char(tty, 0, TTY_OVERRUN);
523 
524 		if (status & UART_DCD)
525 			usb_serial_handle_dcd_change(port, tty,
526 				   priv->line_status & MSR_STATUS_LINE_DCD);
527 	}
528 
529 	tty_insert_flip_string_fixed_flag(tty, data, tty_flag,
530 							urb->actual_length);
531 	tty_flip_buffer_push(tty);
532 	tty_kref_put(tty);
533 }
534 
535 static int spcp8x5_wait_modem_info(struct usb_serial_port *port,
536 				   unsigned int arg)
537 {
538 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
539 	unsigned long flags;
540 	unsigned int prevstatus;
541 	unsigned int status;
542 	unsigned int changed;
543 
544 	spin_lock_irqsave(&priv->lock, flags);
545 	prevstatus = priv->line_status;
546 	spin_unlock_irqrestore(&priv->lock, flags);
547 
548 	while (1) {
549 		/* wake up in bulk read */
550 		interruptible_sleep_on(&priv->delta_msr_wait);
551 
552 		/* see if a signal did it */
553 		if (signal_pending(current))
554 			return -ERESTARTSYS;
555 
556 		spin_lock_irqsave(&priv->lock, flags);
557 		status = priv->line_status;
558 		spin_unlock_irqrestore(&priv->lock, flags);
559 
560 		changed = prevstatus^status;
561 
562 		if (((arg & TIOCM_RNG) && (changed & MSR_STATUS_LINE_RI)) ||
563 		    ((arg & TIOCM_DSR) && (changed & MSR_STATUS_LINE_DSR)) ||
564 		    ((arg & TIOCM_CD)  && (changed & MSR_STATUS_LINE_DCD)) ||
565 		    ((arg & TIOCM_CTS) && (changed & MSR_STATUS_LINE_CTS)))
566 			return 0;
567 
568 		prevstatus = status;
569 	}
570 	/* NOTREACHED */
571 	return 0;
572 }
573 
574 static int spcp8x5_ioctl(struct tty_struct *tty,
575 			 unsigned int cmd, unsigned long arg)
576 {
577 	struct usb_serial_port *port = tty->driver_data;
578 	dbg("%s (%d) cmd = 0x%04x", __func__, port->number, cmd);
579 
580 	switch (cmd) {
581 	case TIOCMIWAIT:
582 		dbg("%s (%d) TIOCMIWAIT", __func__,  port->number);
583 		return spcp8x5_wait_modem_info(port, arg);
584 
585 	default:
586 		dbg("%s not supported = 0x%04x", __func__, cmd);
587 		break;
588 	}
589 
590 	return -ENOIOCTLCMD;
591 }
592 
593 static int spcp8x5_tiocmset(struct tty_struct *tty,
594 			    unsigned int set, unsigned int clear)
595 {
596 	struct usb_serial_port *port = tty->driver_data;
597 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
598 	unsigned long flags;
599 	u8 control;
600 
601 	spin_lock_irqsave(&priv->lock, flags);
602 	if (set & TIOCM_RTS)
603 		priv->line_control |= MCR_RTS;
604 	if (set & TIOCM_DTR)
605 		priv->line_control |= MCR_DTR;
606 	if (clear & TIOCM_RTS)
607 		priv->line_control &= ~MCR_RTS;
608 	if (clear & TIOCM_DTR)
609 		priv->line_control &= ~MCR_DTR;
610 	control = priv->line_control;
611 	spin_unlock_irqrestore(&priv->lock, flags);
612 
613 	return spcp8x5_set_ctrlLine(port->serial->dev, control , priv->type);
614 }
615 
616 static int spcp8x5_tiocmget(struct tty_struct *tty)
617 {
618 	struct usb_serial_port *port = tty->driver_data;
619 	struct spcp8x5_private *priv = usb_get_serial_port_data(port);
620 	unsigned long flags;
621 	unsigned int mcr;
622 	unsigned int status;
623 	unsigned int result;
624 
625 	spin_lock_irqsave(&priv->lock, flags);
626 	mcr = priv->line_control;
627 	status = priv->line_status;
628 	spin_unlock_irqrestore(&priv->lock, flags);
629 
630 	result = ((mcr & MCR_DTR)			? TIOCM_DTR : 0)
631 		  | ((mcr & MCR_RTS)			? TIOCM_RTS : 0)
632 		  | ((status & MSR_STATUS_LINE_CTS)	? TIOCM_CTS : 0)
633 		  | ((status & MSR_STATUS_LINE_DSR)	? TIOCM_DSR : 0)
634 		  | ((status & MSR_STATUS_LINE_RI)	? TIOCM_RI  : 0)
635 		  | ((status & MSR_STATUS_LINE_DCD)	? TIOCM_CD  : 0);
636 
637 	return result;
638 }
639 
640 /* All of the device info needed for the spcp8x5 SIO serial converter */
641 static struct usb_serial_driver spcp8x5_device = {
642 	.driver = {
643 		.owner =	THIS_MODULE,
644 		.name =		"SPCP8x5",
645 	},
646 	.id_table		= id_table,
647 	.num_ports		= 1,
648 	.open 			= spcp8x5_open,
649 	.dtr_rts		= spcp8x5_dtr_rts,
650 	.carrier_raised		= spcp8x5_carrier_raised,
651 	.set_termios 		= spcp8x5_set_termios,
652 	.init_termios		= spcp8x5_init_termios,
653 	.ioctl 			= spcp8x5_ioctl,
654 	.tiocmget 		= spcp8x5_tiocmget,
655 	.tiocmset 		= spcp8x5_tiocmset,
656 	.attach 		= spcp8x5_startup,
657 	.release 		= spcp8x5_release,
658 	.process_read_urb	= spcp8x5_process_read_urb,
659 };
660 
661 static struct usb_serial_driver * const serial_drivers[] = {
662 	&spcp8x5_device, NULL
663 };
664 
665 module_usb_serial_driver(spcp8x5_driver, serial_drivers);
666 
667 MODULE_DESCRIPTION(DRIVER_DESC);
668 MODULE_VERSION(DRIVER_VERSION);
669 MODULE_LICENSE("GPL");
670 
671 module_param(debug, bool, S_IRUGO | S_IWUSR);
672 MODULE_PARM_DESC(debug, "Debug enabled or not");
673